5results about How to "Reduce pressure per unit area" patented technology

The utility model relates to gas pipe correction technical field especially, it relates to a kind of PE gas pipe correction clamp, solve the problem that the pipe wall is prone to local indentation, flattening or stress concentration, and new plastic deformation is easily caused in the clamping area of pipe body when only applying correction force from outside in prior art due to the certain flexibility and elasticity of PE material.A kind of PE gas pipe correction clamp, including frame, both sides of frame are fixedly connected with side plate, and the opposite side of two side plates is equipped with arc clamping plate, and the bottom of two arc clamping plates is slidably connected between the bottom of frame, both sides of frame are equipped with support rod, and the one end of two support rods is respectively through both sides of frame.The utility model effectively solves the problem that pipe wall is prone to flattening, indentation or uneven stress due to lack of inside support in existing correction clamp, realizes the simultaneous support and uniform stress of inside and outside of PE gas pipe.

The application discloses a crankshaft transmission mechanism for an engine, which comprises a crankshaft and a connecting rod, a crank arm and a balance weight are integrally formed and are connected through a smooth transition of a concave arc surface; a first boss in a ring shape is arranged on the outer side surface of the crank arm near the two ends of the crankshaft, and the radial outer contour of the first boss extends to be tangent to the concave arc surface; the end surface of the one end of the crank arm where a connecting rod journal is located is a circular arc surface, is concentric with the connecting rod journal, and has a diameter smaller than the outer diameter of the axial end surface of the big end of the connecting rod. The radial size of the first boss is enlarged to increase the contact area with the inner wall of the shell to reduce the surface pressure, meanwhile, the big end of the connecting rod is exposed to the axial end surface to form a lubrication exposed area through the circular arc surface, so that forced lubrication and cooling are realized; and through the structure that the end surface of the driving gear is integrated into a contact surface, the semi-ring second boss surface is axially positioned, the connecting rod journal is thickened, and the eccentric mass block of the balance shaft is recessed to avoid, the wear resistance, the lubrication and heat dissipation performance, the structural strength and the running stability of the crankshaft transmission mechanism are simultaneously improved under the compact layout.

The utility model relates to the technical field of welding, in particular to a resistance welding electrode assembly which comprises a first electrode and a second electrode, the first electrode comprises a first electrode body and a first electrode cap, and the second electrode comprises a second electrode body and a second electrode cap. The second electrode cap is provided with a second end face, and the diameter of the first end face is larger than that of the second end face. Through accurate heat distribution, the welding parameter adjusting frequency is reduced, long-time stable welding is achieved, the production takt time can be effectively shortened, the comprehensive manufacturing cost is reduced, and the requirement of industrial production for efficient and stable welding is met.

The utility model discloses a lifting device and a lifting connection device. The lifting device comprises a supporting structure, the supporting structure comprises at least one supporting assembly, the supporting assembly is used for containing a base plate, each supporting assembly comprises a first base, the first base is provided with a plurality of sets of supporting units, and the supporting units are connected with the base plate; the lifting structure comprises a driving part, the output end of the driving part is provided with a steering assembly, the steering assembly is connected with at least one lifting assembly and converts rotary motion into vertical motion, and the lifting assemblies are connected with the first base so as to drive the base plate to ascend or descend. According to the utility model, the single driving piece drives the lifting assemblies through the steering assembly, so that synchronous lifting of multiple supporting points is ensured, and inclination or clamping stagnation of the substrate is avoided; the steering assembly converts the horizontal rotating motion of the driving piece into the vertical direction, and the problem that the precision of a traditional pneumatic / hydraulic system is insufficient due to pressure fluctuation is solved.

The utility model relates to pipeline protection structure technical field discloses a kind of anticorrosive pipeline protection structures, including protective layer, the both ends of the outer side top and bottom of protective layer are fixedly connected with fixed block, the fixed block is connected with fixed ring by installation component, the left and right ends of the fixed ring are all set with clamping slot, detachably connected with horizontal plate in the inner wall of clamping slot, the similar end of horizontal plate is all fixedly connected with limit board, the protective layer is connected with support ring by fixed component, the inner wall of support ring is fixedly connected with support plate, the inner wall of support plate is provided with pipe body, the inner wall of protective layer is all set with limit slot in front and back end. In the utility model, air circulation is promoted by support ring air hole, sealing plate and protective layer cooperate to form multiple anticorrosive barriers, compared with traditional single coating more effectively insulate corrosive medium;Meanwhile, fixed ring, horizontal plate and limit board are used to increase soil contact area, load dispersion reduces settlement, and stability is better than traditional structure.