187 results about "Steel square" patented technology

The invention relates to the technical field of rail transit materials, in particular to a CFRP reinforced thin-wall square tube plastic mechanical model construction and prediction method, and the construction method comprises the steps: 1, forming a mixed square tube by a CFRP square tube and a Steel square tube; 2, establishing a plastic mechanical model of the CFRP reinforced thin-wall square tube under the end constraint boundary condition; the prediction method comprises the following steps: S1, obtaining size data and material parameters of the mixed square tube; s2, selecting a proper plastic mechanical model; and S3, inputting the data into the model, and predicting the plastic mechanics and energy absorption response of the hybrid square tube under the end constraint condition. The invention provides a method for constructing a plastic mechanics theoretical prediction model of a CFRP reinforced thin-wall square tube. And an expression between the bending load and the deflection of the hybrid square tube under the end constraint condition and an energy absorption theoretical prediction model are constructed. The method achieves the accurate prediction of the influence rule of the change of each structure parameter on the energy absorption mechanism of the CFRP reinforced thin-wall square tube.

A multi-purpose framer's speed square in the form of a right triangle comprising a top plate with a T-shaped edge and a series of etched top plate lines including framing top plate call outs, a notched front edge having a plurality of notches spaced along the length in ¼″ increments, ruler etching callouts, and lumber width callouts denoting lumber sizes, and a hypotenuse edge having etched top plate lines, common rafter window plumb cut outs and a hip / valley section disposed above the hypotenuse edge having etched degrees and hip / valley roof rafter plumb cuts.

The invention relates to the technical field of pipeline welding, in particular to a stainless steel square pipe plasma arc welding device which comprises a base and further comprises a supporting mechanism, a welding mechanism and a clamping mechanism. The stainless steel square tube plasma arc welding device comprises a base, a welding mechanism and a clamping mechanism, the welding mechanism comprises a double-shaft air cylinder, a welding gun and an angle adjusting assembly, a base table is fixedly arranged at the top of the base, and the clamping mechanism is arranged at the top of the base table and comprises a sliding assembly, a lifting assembly, a rotating assembly, a centering assembly and two clamping plates. And by supporting the interiors of the two square pipes and clamping and limiting the exteriors of the two square pipes, the problem of welding deformation under the action of contraction force and thermal stress of a welding seam can be prevented, and then the plasma arc welding quality is improved.

The utility model relates to the technical field of construction tools, in particular to a measuring angle square which comprises an aluminum handle, one end of the aluminum handle is vertically connected with an angle square, the front face of the angle square is provided with inclined angle rulers which are distributed and arranged, the inclined angle rulers are attached and abut against one another, the other end of the aluminum handle is provided with a sliding groove, and a supporting block is arranged on the inner side of the sliding groove in a limited sliding mode. Protective plates are buckled on the upper surface and the lower surface of the aluminum handle; according to the utility model, the plurality of bevel angle rulers are transversely distributed on the surface of the angle square, the angle square can be directly used for scribing according to the angle required to be measured or cut, the measuring efficiency of a plate is improved, the supporting block is limited and slides on the inner side of the chute at the tail end of the aluminum handle, the supporting block and the ruler body of the angle square are directly used for supporting the plate, and the angle square can be placed; the angle square is prevented from moving due to the fact that the aluminum handle slides downwards, and the use convenience of the measuring angle square is improved.

The utility model discloses a round stone decoration column which comprises supports, the supports are connected with vertical steel rectangular pipes through split bolts, the vertical steel rectangular pipes are connected to adjusting supports, the supports are fixed to a center column through expansion bolts, the four supports are arranged around the center column at equal intervals, the adjusting supports are connected with arc angle steel cross beams, and the arc angle steel cross beams are fixed to the center column. By means of the decoration structure, the decoration problem of the center column of the main body structure is effectively solved, the main body structure construction error and the material machining error can be adjusted through the design of the adjusting support, the splicing flatness of the final decoration shell is guaranteed, and the decoration quality of the decoration shell is improved. And through the design of the arc angle steel cross beams, the stability of main body installation is guaranteed, and the anti-seismic property and safety of the stone are enhanced.

The utility model relates to the technical field of steel structure measurement, and discloses a super high-rise steel structure measuring device, which comprises an angle measuring ruler and two angle measuring rods, one ends of the two angle measuring rods are rotationally connected to the middle part of the angle measuring ruler; the bottom of the protractor is connected with a fixing rod, the fixing rod is slidably sleeved with an adjusting piece used for adjusting the angle between the two protractor rods, and the adjusting piece is provided with an elastic pressing piece abutting against the fixing rod. One end, far away from the protractor, of the fixed rod is provided with a rod type driving piece for adjusting the length of the fixed rod; a telescopic piece used for pushing the adjusting piece to slide on the fixing rod is installed on the adjusting piece. The utility model provides a super high-rise steel structure measuring device, which solves the problem that when an equivalent angle rod is in contact with a steel structure, the surface of the steel structure is uneven or misoperation occurs, and the angle measuring rod is easy to rotate, so that the measured angle is deviated.

The invention relates to a concrete formwork construction method, and relates to the technical field of post-pouring reserved hole supporting-free and dismantling-free integrated formworks, the concrete formwork construction method comprises a fixing mechanism, the fixing mechanism comprises a steel plate, fixing holes, a partition frame, angle steel, grooves, small steel sheets, steel square tubes, rubber strips and short steel, the steel plate is evenly provided with a plurality of fixing holes, and the steel plate is provided with a plurality of grooves. The top of the steel plate is fixedly connected with a partition frame, three pieces of angle steel are arranged in the partition frame, and grooves are formed in the two sides of the angle steel correspondingly, the short steel is arranged to be matched with the fixing holes and other structures, so that the steel plate can be conveniently installed, the steel plate is lifted through the lifting rope and fixed through bolts, and the steel plate can be conveniently installed; a formwork supporting frame does not need to be erected on the lower portion, a large number of frame body materials are saved, manpower for erecting and dismantling the frame body is also saved, the construction cost is reduced, meanwhile, the space of a floor below the reserved hole cannot be occupied, other types of work can be smoothly carried out, and the construction progress is accelerated.

The invention discloses a construction method of a buried assembly type concrete fire pool, which is characterized in that a prefabricated pool top plate and prefabricated pool side plates are produced in a factory in a standardized manner, the quality is controllable, common quality problems in cast-in-place concrete construction are effectively avoided, and the prefabricated pool top plate and the prefabricated pool side plates are assembled and fixed in a manner of reserving connecting anchor bars on plates; a steel square tube bearing structure and a transverse supporting rod are installed in the pool, the structural stability of the fabricated concrete fire-fighting pool is ensured, then anti-seepage concrete is poured and tamped at the splicing position to connect the stand columns and the connecting beams, and finally the interior of the pool is coated with waterproof paint, so that the construction efficiency and the construction quality of the fabricated concrete fire-fighting pool are improved; and the waterproof performance of the structure is effectively ensured.

The utility model belongs to the technical field of pipeline cutting, and particularly relates to an angle-adjustable pipeline cutting device. Comprising a square pipe, a ruler box and a plurality of pipe fixing nuts are welded to the square pipe, pipe fixing bolts are connected into the pipe fixing nuts in a threaded mode, bolt tails of the pipe fixing bolts penetrate through the square pipe, an angle fixing rod is hinged to the square pipe, an angle fixing ruler is inserted into the ruler box, the angle fixing rod is connected with the angle fixing ruler in a bolted mode through a bolt pair, scales are arranged on the angle fixing ruler, and a ruler fixing nut is welded to the ruler box. A sizing bolt is in threaded connection with the interior of the sizing nut, and the tail of the sizing bolt penetrates through the ruler box. The pipeline cutting angle adjusting device can adjust the cutting angle of a pipeline, so that the accuracy of the cutting angle of the pipeline is improved, repeated correction and overlarge gaps caused by overlarge errors are prevented, the welding quality is improved, and leakage points of the pipeline are avoided.

A convenient lattice type pile pulling device comprises a steel square ground breaking module, a lattice column, a lattice column connecting unit and a lattice column extending frame which are sequentially connected from bottom to top, the lattice column extending frame is connected with a vibration head of a crawler crane, and the lower portion of the steel square ground breaking module is a square ground breaking head of a rectangular hollow structure. An inclined plate is arranged on the front face of the upper portion of the steel square ground breaking module to form a variable cross-section, the minimum position of the variable cross-section is connected with the latticed column, and the minimum cross-section of the variable cross-section is the same as the cross-section of the latticed column. Inclined sliding grooves are formed in the left side face and the right side face of the square ground breaking head, the two inclined sliding grooves are sleeved with the steel bottom-carrying pile pulling sliding bolt in an up-down sliding mode, the highest positions of the inclined sliding grooves are close to the front face of the square ground breaking head, namely the maximum section position of the inclined plate, and the lowest positions of the inclined sliding grooves are located in the middle of the square ground breaking head. The structure is easy and convenient to construct, high in construction speed, low in cost and small in influence on the environment.

The utility model provides a steel rectangular tube fireproof wall body structure, which relates to the technical field of fireproof wall devices, and comprises a steel rectangular tube frame and a plurality of fireproof plates, the plurality of fireproof plates are arranged in the steel rectangular tube frame, the thickness of the fireproof plates is greater than the diameter of the steel rectangular tube frame, and the fireproof plates are arranged in the steel rectangular tube frame. The steel rectangular pipe fireproof wall structure comprises a steel rectangular pipe frame, a fireproof plate and fireproof cotton, positioning steel bars are inserted into the inner side of the steel rectangular pipe frame in a penetrating mode, the other ends, penetrating through the steel rectangular pipe frame, of the positioning steel bars are inserted into the fireproof plate, and self-adhesion gridding cloth is connected to the outer surface of the fireproof cotton. Through splicing of the fireproof plates, construction is convenient, the construction period is greatly shortened, the exposed position of the steel rectangular pipe frame is shielded through the fireproof cotton, a fire source is prevented from making direct contact with the steel rectangular pipe frame when a fire happens, and the fireproof grade of the steel rectangular pipe frame is improved.

The invention belongs to the technical field of metallurgy, and particularly relates to low-crack-expansibility high-speed steel casting powder and a preparation method thereof.The casting powder is composed of, by weight, 35%-40% of silicon dioxide, 26%-29% of graphite, 12%-15% of aluminum oxide, 11%-15% of calcium oxide, 2%-4% of calcium fluoride, 3%-5% of magnesium oxide and 2%-5% of sodium oxide. According to the casting powder, by precisely adjusting the proportion of the fluxing agents such as SiO, CaO, CaF and NaO to the key components, the optimized CaO / SiO ratio and a proper amount of AlO, the technical problem that in the casting process of a high-speed steel square billet, surface defects are likely to be formed and expand into macroscopic cracks in the follow-up forging link, and then the product yield and economic benefits are seriously affected is solved.

The present application relates to the technical field of mechanical assembly, in particular to a kind of dome top cover assembly jig manufacturing method, comprising the following steps: S1, according to the contour size of the shape of dome top cover Determine the relative position and size of frame, support arm, S2, according to the curvature of dome top cover Determine the angle of first positioning card plate assembly, second positioning card plate assembly, third positioning card plate assembly;S3, frame is constituted by Q2353 steel square tube and standard parts, support arm is constituted by Q235 steel square tube and standard parts, positioning card plate is constituted by Q235 steel plate and standard parts, S4, support seat is combined by Q235 angle steel, angle iron, positioning pin, connecting plate, all are corresponding standard parts;By setting multiple positioning card plate assemblies, compared with traditional assembly jig tool, the number of positioning card plates is increased, to ensure that each component of dome top cover can be accurately positioned.

The utility model provides a hidden internally-opened aluminum plate window which comprises a hinge, a hinge and a sealing rubber strip and further comprises a first profile frame used for being connected with a steel square pipe at the position of a suspended ceiling window and a second profile frame connected to the inner side of the first profile frame, the hinge is fixed to the upper face of the first profile frame, and the second profile frame is fixed to the lower face of the second profile frame. Two clamping pieces of the hinge are fixedly connected with the first profile frame and the second profile frame respectively, the lower portion of the first profile frame is used for being connected with a suspended ceiling aluminum plate, the lower portion of the second profile frame is fixedly connected with a windowing aluminum plate, and an installation seam is formed between the lower portion of the first profile frame and the lower portion of the second profile frame. The ends, close to the mounting seam, of the suspended ceiling aluminum plate and the windowing aluminum plate are both bent upwards and located in the mounting seam, the second profile frame can rotate upwards around the hinge, the opened window is located in the suspended ceiling, opening is convenient and safer, the windowing aluminum plate only needs to be installed outside the second profile frame in an internal opening mode, and the structure is simple. Cost is saved, the seam hiding effect is achieved, and the appearance is more attractive.

The invention relates to the technical field of measuring tool production, in particular to a cutting device for combined angle square production, comprising: a support frame on which a clamping mechanism for positioning and fixing a combined angle square is arranged; the cutting mechanism is arranged on the supporting frame and used for conducting grooving work on the combined angle square, and the cutting mechanism comprises a cutting tool driven by a first motor; the first driving part is used for driving the cutting tool to move in the Z-axis direction; the second driving part is used for driving the first driving part to move in the X-axis direction; and the intermittent mechanism is driven by the second driving part and is used for controlling the intermittent work of the cutting tool. The cutting device has the advantages that the intermittent mechanism is matched with the first rack and the coil spring, intermittent movement (such as cutting-pause-cutting circulation) of the cutting tool is achieved, invalid cutting time is shortened, energy consumption is reduced, the directional spraying mechanism is matched, centrifugal blades are used for spraying in a linkage mode only in the non-cutting stage, the using amount of cutting fluid is accurately controlled, and the cutting fluid is saved.

1. The name of this design product: Pot washing brush (stainless steel square). 2. Purpose of the product of this design: a pot washing brush used for washing pots and pans. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic drawing 1. 5. The bottom view of Design 1 has been shown in the stereoscopic view of Design 1 2, and the bottom view of Design 2 has been shown in the stereoscopic view of Design 2 2. The bottom view of Design 1 and the bottom view of Design 2 are omitted. 6. Designate Design 1 as the base design.

The present application relates to the technical field of nuclear fusion device processing and manufacturing, and particularly relates to a double-layer stainless steel square neck pipe and a processing and manufacturing method thereof. The square neck pipe comprises an inner shell formed by butt welding of multiple arc-shaped inner shell pieces, an outer shell formed by butt welding of arc-shaped outer shell pieces and straight outer shell pieces, a web plate connecting the inner and outer shells, and a support guide column welded to the outer arc surface of the inner shell. The double-layer stainless steel square neck pipe can be modularly split and cut, the arc-shaped pieces are subjected to solid solution treatment with a mold, the inner shell assembly welding, web plate welding, low-temperature annealing, support guide column welding and outer shell assembly welding are sequentially performed, and in the key welding process, small heat input welding process is adopted and laser scanning monitoring is performed at intervals. Through model splitting, stress control and whole-process precision monitoring, the present application can inhibit the processing and welding deformation of austenitic stainless steel, realize high-precision manufacturing of the double-layer square neck pipe with millimeter-level profile, and avoid the risk of traditional straightening process.

The application discloses a flexible assembly jig for a forklift mast and a mast assembly fixing method. When the flexible assembly jig is used, a pin hole positioning shaft is used in cooperation with a low positioning seat to fix a mast roller installation hole; the pin hole positioning shaft is used in cooperation with a high positioning seat and a spacer to fix an outer mast frame installation hole; a positioning block and a limiting block are used to form a mast slide way fixing assembly to position a mast roller slide way; a threaded hole positioning shaft, a positioning shaft installation block and a positioning angle ruler are used to form a threaded hole positioning assembly to fix an outer mast oil cylinder installation hole and a chain installation hole; a limiting block and a positioning angle ruler are used to form a mast lower cross beam fixing block to support a mast lower cross beam; and the limiting block is used to limit the mast end portion. The application has high flexibility and strong universality, can improve the positioning accuracy and positioning efficiency of the mast workpiece, and ensures that the workpiece is firmly positioned during welding.

The invention discloses a full-automatic shoe washing machine capable of being embedded into the ground. The shoe washing machine comprises an inflation water-resisting layer, a shoe sole supporting frame, a gear track and a drainage groove. The sole supporting frame comprises a sleeve, a steel column and a steel square frame, the steel column is sleeved with the sleeve, the steel column is fixed to the steel square frame, and the two sides of the steel square frame are connected with electric push-pull rods; two steel frames are independently mounted on the gear track below the sole support frame, and a brush, a sprinkler head, a hair wiper and a water suction port are respectively fixed on the two steel frames; when the shoe sole cleaning device works, the brush is used for cleaning shoe soles, when the electric push-pull rod drives the steel square frame and the steel column to move front and back, the sleeve rotates to expose the uncleaned shoe soles, and the shoe soles are further cleaned by the brush and wiped by the brush. And thorough and comprehensive cleaning of the shoe sole is realized. The shoe washing machine is simple in structure, ingenious in design, capable of being embedded into various ground structures such as tiles, wood floors and floor heating along with decoration, capable of guaranteeing ground flatness, wide in application scene and high in practicability.

The utility model discloses an anti-deviation embedded part system which comprises pre-welding parts, a plate-type embedded part and a full-length steel square pipe, the pre-welding parts are welded to the two sides of the waist of an I-shaped steel structural beam, a plurality of threaded holes are formed in the pre-welding parts, the plate-type embedded part is fixed in a concrete floor, and the full-length steel square pipe is connected with the pre-welding parts. The full-length steel square pipe is welded to the plate-type embedded part above the concrete floor slab, the plate-type embedded part below the concrete floor slab is welded to an adapter square pipe, the welding square pipe is welded to a steel adapter, a plurality of threaded holes are formed in the steel adapter, and the steel adapter is welded to the through-length steel square pipe. According to the deviation-preventing embedded part system, when large deviation occurs, use of the embedded parts is not affected, the field installation efficiency is improved, compared with a traditional embedded part form, the use number of the embedded parts is effectively reduced, and use and arrangement of the embedded parts on a construction site are more flexible.

The utility model discloses a steel square tube connecting and positioning structure which comprises a main steel square tube, the main steel square tube is vertically arranged, a first concave base is fixedly connected to the center of the outer wall of the main steel square tube, grooves are formed in the four faces of the corners of the top of the first concave base, the bottom of a steel sleeve is buckled with the grooves of the first concave base through protrusions, and the steel sleeve is fixedly connected with the main steel square tube. The four sides of the side wall of the steel sleeve are provided with square grooves, the square grooves of the steel sleeve are buckled with side steel square pipes, the side walls of the side steel square pipes are sleeved with first bolts, and the first bolts penetrate through the steel sleeve blocks to be in threaded connection with the screw holes of the main steel square pipe. A supporting system of a foundation pit is achieved, meanwhile, positioning work of installation is completed, the whole is more stable when connection is reinforced, the shape is not greatly changed in production, only punching work is added, a stable inner supporting structure is formed in construction, and the structure has the independent disassembly function and can be assembled according to the position of the foundation pit; meanwhile, the influence of mounting and dismounting of the inner support on foundation pit construction is reduced.

The utility model discloses a prefabricated partition wall suitable for side air supply of a data center machine room, which belongs to the field of construction, and comprises an air conditioning room, a machine room, a corridor, an edge closing keel, a rock wool sandwich board, a steel square tube, a thick gypsum board, a light steel keel, a color steel plate and a single glass magnesium board. The purpose of rapidly assembling a plurality of wallboards is achieved by arranging the edge closing keels, the rock wool sandwich boards, the steel square tubes, the thick gypsum boards, the light steel keels, the color steel plates and the single glass magnesium boards, the original framework structure can be kept through cooperation of the steel square tubes, the thick gypsum boards, the color steel plates and the single glass magnesium boards, and rapid and flexible installation can be achieved; the partition wall practice scheme of the machine room side and the air conditioner room side can be matched with a data machine room air supply mode of side air supply, the partition wall practice scheme of the two rooms without raised floors is synchronously optimized, the interior decoration style of the whole space can be matched, and the construction speed is increased.

The invention relates to a forging method of an M2 high-speed steel square forge piece, which comprises the following steps: 1) heating a blank, heating to 500 DEG C at a speed of less than or equal to 200 DEG C / h, heating to 850 DEG C at a speed of less than or equal to 60 DEG C / h, heating to 1070 DEG C at a speed of less than or equal to 80 DEG C / h, heating to 1150-1170 DEG C at a speed of less than or equal to 100 DEG C / h, cooling to 1125-1145 DEG C, and carrying out heat preservation forging; (2) a circle is forged on a 1800-ton radial forging machine, the diameter of the circle is 20-30 mm larger than that of the side of the square forge piece, the hammering amount of the first pass and the hammering amount of the last pass are 20-30 mm, and the hammering amount of the rest passes is 35-45 mm; (3) before forging, an axial feeding clamping jaw for clamping the blank does not rotate and only can do axial reciprocating motion, one-pass lower hammer forging is carried out to form a square piece, and a square forge piece with arc edges and corners is obtained; (4) after forging and forming, feeding to an annealing furnace, heating to 740-780 DEG C at the speed of less than or equal to 80 DEG C / h, preserving heat, cooling to 700-740 DEG C at the speed of less than or equal to 7 DEG C / h, cooling to 530-570 DEG C at the speed of less than or equal to 50 DEG C / h, opening a furnace door, cooling to 280-320 DEG C, and discharging; and (5) straightening is conducted after discharging, the materials are tiled, air-cooled and aired to the room temperature after being straightened, and the problems that uniformity and consistency are poor, the heating number is large, the outturn percentage is low, efficiency is low, and square forgings with arc-shaped edges and corners are not prone to being forged are solved.

The invention provides a stainless steel waterproof structure of an ultra-deep diving pool and a construction method of the stainless steel waterproof structure. Polyurethane primer covers the pool bottom and the pool wall of the ultra-deep diving pool; the polymer cement waterproof mortar covers the polyurethane primer on the pool bottom and the pool wall respectively; the stainless steel tank bottom is welded on the polymer cement waterproof mortar at the tank bottom; the stainless steel connectors and the cement overhanging piece keels are welded on the polymer cement waterproof mortar of the pool wall at intervals; the stainless steel square tubes are welded on the stainless steel corner connectors; the stainless steel tank wall plates are welded on the stainless steel square pipes, the cement hanging piece keels penetrate out of the stainless steel tank wall plates, and decorative bricks are arranged on the cement hanging piece keels penetrating out of the stainless steel tank wall plates; the decoration of the deep diving center is attractive and practical, and meanwhile, the waterproof and durability requirements in a special environment are met.

The utility model discloses a novel black copper sludge receiving tank, and belongs to the technical field of copper electrolytic refining. The device comprises a stainless steel square steel rack, stainless steel lifting lugs and a glass fiber reinforced plastic tank body, the glass fiber reinforced plastic tank body is a rectangular tank body, a circle of stainless steel square steel rack is fixed on the periphery of the top of the glass fiber reinforced plastic tank body, four single pieces of the stainless steel square steel rack are arranged in an outward inclined mode, and glass fiber reinforced plastic is embedded in the four single pieces of the stainless steel square steel rack; stainless steel lifting lugs are fixed to the positions, on the inner side of the stainless steel square steel rack, of the four corners of the glass fiber reinforced plastic groove body correspondingly, the four stainless steel lifting lugs are arranged on the glass fiber reinforced plastic groove body in a rectangular shape, and lifting rings are arranged on the stainless steel lifting lugs correspondingly. Glass fiber reinforced plastic is pasted outside the stainless steel square steel rack, glass fiber reinforced plastic is pasted outside the stainless steel lifting lugs, the stainless steel square steel rack is made of stainless steel square steel, and the interior of the glass fiber reinforced plastic is flat and smooth. According to the utility model, the tank cleaning time can be effectively shortened, the working efficiency is improved, the labor intensity is reduced, and the safety coefficient is improved.

The utility model discloses a support frame for placing a bridge frame, which comprises a bridge frame assembly and a support assembly, the bridge frame assembly is positioned above the support assembly, the support assembly comprises a support tube, a top hole, a sliding chute, a clamping plate, a sliding block, a bolt, a fan hole, a fan and a lifting appliance, the support tube is a stainless steel square tube, the top of the support tube is provided with the top hole, and the top of the support tube is provided with the sliding chute. A sliding groove is formed in the top of the supporting pipe, the sliding groove is trapezoidal, a clamping plate is arranged above the supporting pipe, a sliding block is fixedly connected to the bottom of the clamping plate, the sliding block is trapezoidal, a bolt is connected to the clamping plate in a threaded mode, and fan holes are formed in the left side wall and the right side wall of the supporting pipe. By arranging the supporting pipe, the sliding grooves, the clamping plates, the sliding blocks and the bolts, the bridge and the supporting pipe can be connected together by adjusting the position between the clamping plates on the two sides in the laying process, and therefore the bridge laying device is suitable for bridges of different sizes and high in applicability.

The utility model relates to the technical field of square tubes, in particular to a stainless steel square tube easy to cut, which comprises a square tube and a gasket component, the gasket component is arranged on the outer surface of the square tube, a dovetail groove is arranged on the outer surface of the square tube, and grooves are equidistantly arranged on two sides of the dovetail groove on the outer surface of the square tube. The gasket assembly comprises a first gasket and a second gasket, and the first gasket and the second gasket are connected with the dovetail groove through clamping grooves. By additionally arranging the auxiliary cutting structure and forming different grooves in the outer surface, the effect of auxiliary limiting is achieved, the stability of the square pipe in the cutting machining process is improved, pressure borne by extrusion can be relieved, deformation is avoided, and therefore the using effect is improved.

The invention discloses a square thin-wall shell. The square thin-wall shell is manufactured by performing multi-pass deep drawing forming on an ellipse-like steel plate original blank. Correspondingly, the invention further discloses a manufacturing method of the square thin-wall shell, and the manufacturing method comprises the following steps: obtaining an ellipse-like steel plate original blank; and multi-pass deep drawing forming is conducted on the steel plate original blank, and the square thin-wall shell is obtained. The obtained square thin-wall shell can replace an existing aluminum shell, so that high strength is obtained while light weight is guaranteed, and reduction of carbon emission is facilitated. According to the manufacturing method disclosed by the invention, a multi-pass deep drawing forming process aiming at the ellipse-like steel blank is adopted, so that the manufacturing problem of the steel square thin-wall shell is effectively solved.

The utility model discloses a kind of turnover rapid splicing steel structure tower crane foundation templates, the foundation template includes: template body, the template body includes inner side and outer side, the template body can be welded along its length direction between, it can also be in first placement state or second placement state and be fixed;Wherein, first placement state is the inner side between the template body is placed at right angle angle, second placement state is the outer side between the template body is placed at right angle angle, to make template body can be connected and form a rectangular mold cavity, the rectangular mold cavity is used for pouring foundation;Foundation template further includes: inner bracing, both ends of the inner bracing are installed in the inner side of the template body;Steel square tube main keel is transversely installed in the outer side of the template body, for connecting template body in the first placement state.

The invention provides a multifunctional transport trailer for transferring and fixing an unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicle corollary equipment, the multifunctional transport trailer comprises a transfer frame which is of a rectangular frame structure formed by welding stainless steel square tubes, support rails are symmetrically arranged on the transfer frame left and right, and the support rails are used for supporting an undercarriage of the unmanned aerial vehicle; one end of the supporting rail is of a downwards-bent arc-shaped structure facilitating loading of the undercarriage, and a reset base is arranged on the outer wall of the other end of the supporting rail. An L-shaped outer blocking piece is vertically and upwards arranged at the edge of the outer end of the top of the supporting rail. In the aspects of mounting, dismounting and fixing of the unmanned aerial vehicle undercarriage, the undercarriage can easily slide into and be fixed on the transfer frame through the design of the arc-shaped structure of the supporting rail and the reset seat, and the difficulty of mounting and dismounting operation is remarkably reduced. The stability of the undercarriage in the transportation process is ensured through the cooperation of the outer blocking piece and the inner blocking edge block, the fixing effect is further enhanced through the linkage design of the lock frame and the lock rod, and the undercarriage is prevented from moving or falling off in the transportation process.