40results about How to "Prevent arching deformation" patented technology

The invention belongs to the field of ship T-shaped profile machining, and particularly discloses a ship T-shaped profile anti-deformation machining process. The ship T-shaped profile anti-deformationmachining process comprises the following steps that a T-shaped profile component assembling and welding anti-deformation jig frame and a T-shaped profile component mold are built, and the T-shaped profile component mold is provided with a mold cavity matched with a T-shaped profile component; the T-shaped profile component is placed in the mold cavity, the mold cavity is filled with a proper amount of liquid nitrogen, the mold is assembled, and the interior of the mold cavity is cooled by the liquid nitrogen; the T-shaped profile component is placed on the assembling and welding anti-deformation jig frame, the T-shaped profile component is fixed through a fixing structure on the assembling and welding anti-deformation jig frame, a cooling agent is sprayed to a weld joint area of the T-shaped profile component through a spray head, the temperature of the weld joint area is lower than that of a base metal area, and a weld joint anti-deformation freezing layer is formed in the weld joint area; and after fixing is completed, assembling and welding of the T-shaped profile component are conducted, and after assembling and welding are completed, repair welding and air hole grinding needto be conducted on weld joints. The machining process is free of deformation, and the working efficiency of shipbuilding can be greatly improved.

The invention relates to a floor capable of being provided with various kinds of keels. A plank left vertical insertion tenon, a plank left vertical insertion groove and a plank horizontal insertion groove are formed in the left edge of a plank, a plank right vertical insertion groove is formed in the right edge of the plank, and a bottom insertion groove is formed in the bottom of the plank; a first keel decoration strip, a first keel vertical insertion groove and a first keel right vertical insertion tenon are formed in the upper portion of a first keel from left to right in sequence, a first keel horizontal insertion tenon is formed in the middle of the first keel, a first bottom vertical insertion tenon extends to the lower portion of the first keel, a first keel left vertical insertion tenon is formed in the lower portion of the first keel decoration strip of the first keel, and the first keel is an aluminium alloy solid body; the plank can be installed by adopting various kinds of keels, and the first keel has good heat conduction performance and is low in production cost; the second keel has good elasticity, and through the second keel, the plank can be prevented from arching and deforming.

The invention discloses a copper bar connecting structure. The copper bar connecting structure comprises an input copper bar, an output copper bar and bolts, wherein the input copper bar and the output copper bar are arranged in a crossed manner, the cross section of the input copper bar is I-shaped, long grooves are formed in the two sides of the input copper bar, nuts are arranged in the long grooves, and a conductive pad is arranged between the input copper bar and the output copper bar; after sequentially penetrating through the output copper bar and the conductive pad, the bolts are fixed on the nuts in the long grooves; the cross sections of the long grooves are in a shape like the Chinese character tu, and raised lines are arranged on the inner surfaces of the open ends of the long grooves; grooves are formed in the surfaces of single sides of the nuts, and the raised lines are clamped in the grooves. The copper bar connecting structure has the advantages that the input copper bar is designed to be I-shaped, and the nuts can slide in the long grooves, so that the output copper bar can be fixed in any position in the long grooves without punching holes; current flows in from the input copper bar, flows across the conductive pad and then flows out from the output copper bar.

A floor with a heat emitting, heat guiding and heat insulating function and a transverse inserted connection function comprises a wood board block and a keel. According to the keel of the structure, transverse auxiliary ribs are formed on the left side and the right side of a main rib respectively, the lower surface of each auxiliary rib is an inclined surface, the inner side of each inclined surface extends to form a hook-shaped tenon, the two auxiliary ribs are connected together through an elastic piece, and a heating cable is placed in each auxiliary rib; a main rib insertion groove, auxiliary insertion grooves and hook-shaped tenon insertion grooves are formed in the wood board block, the main rib, the auxiliary ribs and the hook-shaped tenons are inserted in the main rib insertion groove, the auxiliary insertion grooves and the hook-shaped tenon insertion grooves respectively, the main rib is vertical, the auxiliary ribs are transverse and straight, and the hook-shaped tenons arestraight. The floor can prevent the wood board block from arching deformation and has the heat emitting, heat guiding and heat insulating function and the horizontal oppositely inserted installationfunction.

The invention relates to the technical field of foundation pit supporting, and particularly relates to a safety supporting structure for civil engineering foundation pit supporting. The safety supporting structure comprises a plurality of supporting plates, wherein upper channel steel extending towards one side of a slope body is fixedly arranged at the upper ends of the supporting plates, lower channel steel extending towards the side away from the slope body is fixedly arranged at the lower ends of the supporting plates, openings of the upper channel steel and the lower channel steel are upward, and drainage grooves used for drainage are formed in the upper ends and the lower ends of the supporting plates; and vertically-arranged reinforcing ribs are arranged in the middles of the left sides of the supporting plates, and first holes are formed in the reinforcing ribs. According to the safety supporting structure, the supporting plates, the reinforcing ribs and steel wire ropes are arranged so that the overall structural stability of the supporting plates can be improved, the vibration energy can be consumed, the damping effect can be achieved, and therefore the situation that residual deformation of prestressed anchor rods is caused due to position deviation of the supporting plates can be avoided, the constraint of the prestressed anchor rods on the slope body can be guaranteed, and the risk of instability and collapse of the slope body can be reduced.

The invention discloses a copper bar connecting structure comprising an input copper bar, an output copper bar and a bolt, wherein the input copper bar and the output copper bar are arranged in a crossed manner, the cross section of the input copper bar is in an I shape, long grooves are formed in the two sides of the input copper bar, and nuts are arranged in the long grooves, a conductive cushion block is arranged between the input copper bar and the output copper bar, the bolt penetrates through the output copper bar and the conductive cushion block in sequence, and then is fixed on the nuts in the long grooves, the cross section of each long groove is in a convex shape, a convex strip is arranged on the inner surface of the opening end of the long groove, and a groove is formed in thesingle side surface of each nut, and the convex strip is clamped into the groove. The method has the advantages that the input copper bar is designed into an I shape, the nuts can slide in the long grooves, so that the output copper bar can be fixed at any position in the long grooves, hole punching is not needed, the current flows from the input copper bar, passes through the conductive cushion block and then flows out of the output copper bar.

The invention relates to a combined double-keel decorative board. A right additional rib and a left additional rib are located on the two sides of a main rib respectively; a hollow sleeving part is arranged at the upper part of an upper keel; an upper keel right additional rib chase mortise extends transversely from the hollow sleeving part; the right additional rib is arranged in the upper keel right additional rib chase mortise; the upper keel right additional rib chase mortise is inserted and sleeved into a matched right additional rib groove in a board block; the left additional rib is inserted and sleeved into a matched left additional rib inserting groove in the board block; the main rib is sleeved with the hollow sleeving part; the hollow sleeving part is inserted and sleeved into a matched main rib inserting groove in the board block; an additional bar transverse clearance less than 1mm exists between the right additional rib and the upper keel right additional rib chase mortise; and a main rib transverse clearance less than 1mm exists between the hollow sleeving part and the main rib. According to the board, the board block can be effectively prevented from arch camber deformation, and visible contraction joint gaps on the surface of the board block can be smaller.

The invention discloses a karst grouting reinforcement method near an existing ballastless track roadbed; and the newly built building substrate karst grouting reinforcement near the existing ballastless track roadbed is scientifically and reasonably performed to effectively prevent the upwarp deformation of the ballastless track roadbed. The method comprises the following steps: (1) related parameters are determined through data collection or a high-density electrical method or a ground penetrating radar or an earthquake reflecting method or electromagnetic wave CT; (2) the weight gamma d andthe internal friction angle FORMULA of a substrate karst top covering layer of the existing roadbed are determined through scene investigation or data collection or drilling sampling or indoor geotechnical tests; (3) the grouting pressure omega z of the newly built building substrate karst is determined through calculation; and (4) the newly built building substrate is drilled to a karst distribution area; and the grouting reinforcement is performed according to the grouting pressure not higher than the grouting pressure omega z determined in the step (3).