7 results about "Longitudinal contraction" patented technology

The invention discloses a portal type integrated operation workstation capable of adapting to different underground cavern sections. The portal type integrated operation workstation comprises a frame supporting system, an intelligent control room, a moving walking system, an electrical system and a functional arm system. The frame supporting system comprises first longitudinal beams which are arranged in a left-right spaced mode, and a plurality of transverse telescopic joints are installed between the left first longitudinal beam and the right first longitudinal beam. A plurality of longitudinal shrinkage joints are mounted at the lower end of each first longitudinal beam, the lower ends of the longitudinal shrinkage joints are connected with a high-strength supporting frame, and a movable walking system is mounted at the bottom of the high-strength supporting frame; the functional arm system comprises a concrete spraying-arch mounting arm, an anchor rod mounting arm and a drilling arm which are arranged in a layered mode from top to bottom. According to the portal type integrated operation workstation capable of adapting to different underground cavern sections, the functions of drilling, anchor rod construction, grouting, net hanging, arch frame installation, spraying and mixing and the like are integrated, and meanwhile the size of equipment can be freely adjusted so that the portal type integrated operation workstation can adapt to the extra-large sections of different sizes.

The invention discloses a chain clip with longitudinal contraction for a transverse stretcher, and belongs to the technical field of film shaping devices, the chain clip comprises a track and a plurality of clamping plates slidably assembled on the track, a clamping assembly used for clamping a film is mounted on the side, away from the track, of each clamping plate, and a convex rail is mounted on the side, close to the clamping plates, of the track; one side of the convex rail away from the track is inclined; through the arranged adjusting block, in the process that the clamping plate moves along with the rail, the adjusting block can be retained at the concave part of the convex rail, so that when the clamping plate moves to the position close to the concave part, the auxiliary bearing can be matched with the adjusting block, and therefore the main bearing is prevented from moving towards the concave part; and the tension on the film can be continuously and stably increased.

A device and method for controlling cracks in ultra-long concrete slab structures are disclosed. The device includes an anti-buoyancy anchor rod, a container, a moving block, a smooth rod section, and a limiting block. The method includes the steps of assembling the device, anchoring the anchor rod, welding the device to the reinforcing cage, and pouring foundation slab concrete. Based on relevant data on concrete shrinkage, this invention pre-sets a container, a moving block, and a smooth rod section on the rod that can simultaneously satisfy the longitudinal and horizontal shrinkage ranges of concrete. As horizontal and longitudinal shrinkage occurs, the concrete of the foundation slab causes the container to undergo horizontal and longitudinal displacement. At this time, the moving block slides upward on the smooth rod section, simultaneously releasing the constraint force on the foundation slab in the horizontal and longitudinal directions. Since the rod does not hinder the shrinkage deformation of the concrete, cracks caused by the constraint force of the anchor rod will not occur.

The utility model discloses a chain clip system convenient for adjusting a longitudinal shrinkage ratio, a plurality of chain links are sequentially hinged on a plurality of articulated shafts in an end-to-end manner, and matching pieces and chain clip bodies are alternately arranged on the plurality of articulated shafts which are sequentially arranged; the walking assembly is matched with the main track to limit the chain clip body to move in the extending direction of the main track; the first adjusting track and the main track are arranged at an interval in the horizontal direction, and the distance between the two changes according to a preset rule; the adjusting assembly is connected with the first adjusting track so as to drive the first adjusting track to move towards or away from the main track. The matching pieces are located between the main track and the first adjusting track and abut against the first adjusting track, when the chain clip moves in the extending direction of the main track, the matching pieces move along with the chain clip body in the extending direction of the main track, and the first adjusting track forces the two adjacent matching pieces to oppositely swing around hinge shafts connected to the chain clip. And the distance between the two adjacent chain clip bodies is shortened. The longitudinal shrinkage of the film can be realized.

The invention discloses a longitudinal seam welding device and method for a cylinder of a pressure vessel, and relates to the technical field of longitudinal seam welding of pressure vessels. The four pairs of welding guns are arranged and define a rectangle, the welding guns at the two ends synchronously face the center of a welding seam to conduct welding, welding stress is concentrated towards the middle of the welding seam, the pressing wheels are arranged on the two sides of the welding guns, the rotating directions of the pressing wheels point to the welding seam, and welding seam fusion materials are promoted to flow towards the center of the welding seam. By simultaneously applying internal and external synchronous welding and welding two longitudinal seams from the two ends to the center, heat input and cooling in the welding process are symmetrical in the circumferential direction, and then transverse contraction force and longitudinal contraction force generated by contraction of the welding seams are equal in magnitude and opposite in direction in the symmetrical positions; the mutual restraining and counteracting capacities are greatly enhanced, so that the influence of welding stress is reduced, shearing force generated by rotation of the pressing wheels drives molten metal to migrate towards the center of a welding seam, and the undercut defect is reduced.

This utility model discloses a wall longitudinal contraction joint edge-sealing device, belonging to the field of contraction joint technology. Its key technical features include two longitudinal wall bodies, with a water-stopping mechanism positioned between opposite sides of the two longitudinal wall bodies. A decorative cover body is positioned on the front side of each longitudinal wall body, and pulling mechanisms are positioned at the top and bottom of the rear side of the decorative cover body. The water-stopping mechanism includes four screws, two fixing frames, a water-stopping strip body, and two protrusions. The surface of the water-stopping strip body contacts the inner wall of the fixing frames. This solves the problem that in existing longitudinal wall contraction joint edge-sealing devices, the water-stopping strip, after installation, directly and tightly contacts the edge of the longitudinal wall. The rough and sharp edges of the wall can easily cause localized pressure damage to the rubber water-stopping strip, affecting the waterproofing effect. Furthermore, it is inconvenient to open the decorative cover, making it difficult to replace the aged water-stopping strip after long-term use.

A steel box girder structure capable of preventing top plate deformation comprises a U-shaped frame and a top plate body, U-shaped reinforcing ribs formed by transverse partition plates and longitudinal partition plates are fixedly arranged on the inner wall of the U-shaped frame, a plurality of transverse reinforcing rods are fixedly arranged at the bottom of the top plate body, and the transverse reinforcing rods are fixedly connected with the U-shaped reinforcing ribs; the transverse reinforcing rods are fixedly arranged on the top plate in advance to resist transverse shrinkage deformation after the top plate is welded, the transverse reinforcing rods are fixedly connected with the U-shaped reinforcing ribs, and the longitudinal reinforcing rods fixedly connected with the top plate are arranged to resist longitudinal shrinkage deformation after the top plate is welded, so that the stability of the top plate after welding is guaranteed; and while transverse and longitudinal contraction deformation is offset, complex early-stage work such as welding parameter selection and inspection is omitted in the early stage of welding, the production efficiency is improved, and the construction period is shortened.