7results about How to "Straight lines" patented technology

The utility model discloses a slab type ballastless track base plate formwork, including two side steel mould, the side steel mould is by base plate side mould top surface steel sheet, base plate side mould bottom surface steel sheet, base plate side mould panel and base plate side mould formwork rib plate welding composition, and the square steel of being connected between two side steel moulds, and the base plate expansion joint plug -in board of being set between two side steel moulds and being at square steel rear, the utility model discloses adopts the bolt assembly of block type steel formwork, and each base plate is by two steel moulds, and expansion joint position is disconnected with square steel and is connected two side formworks and square steel through bolt, and the expansion joint foam board is clamped between two base plate formworks with the collocation plug -in board, and this design effectively avoids the disturbance of concrete pouring and personnel trample to expansion joint, ensures that expansion joint is vertical, and linear is straight, greatly improves expansion joint construction quality, lays the foundation for track plate accurate laying, guarantees the high -quality completion of high -speed railway slab type ballastless track base plate construction.

The invention discloses a construction process of a main structure of a small-curvature teardrop-shaped cable tower, which is characterized by comprising the following steps: step 1: tower base construction; step 2: connection plate construction; step 3: tower column construction; step 4: lower cross beam construction; wherein step 2 includes steel anchor beam construction, steel anchor beam and corbel integral hoisting, and the installation of the embedded cable guide tube is carried out after the steel anchor beam system is installed and positioned, at which time the connecting bolts between the steel anchor beam and the steel corbel do not need to be tightened in place, and a gap is left for adjustment. If the accuracy requirement is not met, the position of the lower port is fine-tuned to the deviation meeting the accuracy requirement under the premise of meeting the smoothness requirement, and after the steel anchor beam is positioned, a longitudinal limit device of the steel anchor beam is installed, the limit device is perpendicular to the center line of the bridge tower, and the limit device is connected and fixed by a pre-embedded steel plate pre-embedded in the tower wall. The invention ensures the construction efficiency and assembly accuracy of the steel anchor beam and steel corbel unit assembly construction, and enables the main tower to have good technical guarantee.

The invention discloses resin for a KrF photoresist and a preparation method of the resin. The preparation method of the resin for the KrF photoresist comprises the following steps: in a continuous flow reactor, in the presence of an initiator, carrying out polymerization reaction on monomers in parts by weight in a solvent to obtain a polymer; 50-65 parts of a monomer A, 2-15 parts of a monomer B and 25-45 parts of a monomer C are included. The molecular weight distribution of the resin obtained by adopting the preparation method is relatively narrow, the thermal performance requirement of the KrF photoresist can be met, and the KrF photoresist prepared from the resin is clear and straight in pattern circuit after being developed, relatively good in resolution ratio and corrosion resistance and good in application prospect. # imgabs0 #

The invention belongs to the field of single crystal material pole tip V-shaped groove array processing, and particularly discloses a single crystal material V-shaped groove array ultra-precision composite processing method and an alignment method, after the crystal orientation of a single crystal material is determined, femtosecond laser is adopted for processing in the direction parallel or / and perpendicular to the crystal orientation, and the single crystal material pole tip V-shaped groove array is obtained. Forming a microstructure array on the surface of the single crystal material; carrying out wet etching on the processed single crystal material in an anisotropic etching solution; the obtained single crystal material is placed on a tool table of a slitting machining system, a diamond cutter of the slitting machining system is used for further machining the V-shaped groove, and in the machining process, a tool nose of the diamond cutter is aligned with the bottom of the groove, and then slitting machining is conducted.

A high-speed railway track embedded sleeve accurate positioning tool comprises a positioning framework used for being erected and installed on a box girder reinforcing mesh, a plurality of threaded positioning holes allowing bolts to be screwed in are formed in the positioning framework, the center lines of the threaded positioning holes extend in the vertical direction, and the threaded positioning holes are the same as internal threads of an embedded sleeve in specification. According to the tool, self-locking positioning is achieved by screwing the bolts into the threaded positioning holes of the positioning framework, then the pre-embedded sleeves are screwed to the ends of the bolts for self-locking positioning, the positioning framework is installed on a box girder reinforcing mesh corresponding to the required point positions of the pre-embedded sleeves, each pre-embedded sleeve can be adjusted to the designed elevation position by adjusting the bolts, the perpendicularity is high, and the positioning accuracy is high. And the pre-embedded sleeves are linear and straight, so that the impact influence of concrete flow can be resisted in the concrete pouring process, and the modular mounting efficiency is high.

The invention discloses a partition seam structure for waterproof layer protection concrete and a construction method, and relates to the field of building partition seams, the partition seam structure comprises a base, a partition mechanism is arranged above the base, the partition mechanism comprises a partition body plate, and the bottom of the partition body plate is connected with an inner cavity of the base in an inserted mode; the separation body and the base are in deep insertion connection, and the first plastic nails penetrating through the side wall of the base and the separation body are used in an auxiliary mode, so that reliable transverse constraint is formed, floating or displacement possibly occurring in the concrete pouring and vibrating process of the separation body is effectively restrained, and it is guaranteed that the separation seam is accurately positioned, and the linear shape is straight; a butt joint seat arranged at the top is fixed to the top of the partition body through a second plastic nail, and the overall connection strength and shear resistance are improved; the cover strip body is in mechanical clamping connection with the barb groove in the inner wall of the butt joint base through the installation hook on the lower portion of the cover strip body, a detachable structure is formed, the cover strip body can be independently replaced when aged and damaged, and the separation body and the peripheral filling layer do not need to be disturbed.

The utility model discloses a template suitable for urban rail track bed semicircular ditch belongs to urban rail transit construction auxiliary equipment technical field, including semicircular template main part and template endless adjustment support, and the support is by support rod, adjusting lever and two interval settings support arm constitute. The support arm is equipped with the limit card slot, and the both ends of support rod are arranged in the card slot and can slide along the horizontal transverse, thereby realize the convenient adjustment of template main part horizontal position, and the adjusting lever is connected with the support rod through the nut cooperation, realizes the endless fine adjustment of template height. The utility model solves the problem that the template cannot be adjusted after being fixed in prior art, and the splicing error platform needs to be repeatedly disassembled, and its adjustment precision is accurate, and the operation is simple, and the construction efficiency is high, and can guarantee the ditch pouring quality.