62results about How to "Improve hoisting safety" patented technology

The invention discloses a double-quality fly wheel lifting appliance which comprises a lifting plate, a tooth ring covering plate and a clamping plate, wherein the lifting plate is arranged between the tooth ring covering plate and the clamping plate; the lifting plate is connected with the second quality side of a double-quality fly wheel; the tooth ring covering plate comprises a first covering plate and a second covering plate; one end of the first covering plate is hinged with one end of the second covering plate; a first pin shaft is arranged on the first covering plate; a second pin shaft is arranged on the second covering plate; the clamping plate comprises a first clamping plate and a second clamping plate; one end of the first clamping plate is hinged with one end of the second clamping plate; the first clamping plate is connected with the first covering plate by the first pin shaft; the second clamping plate is connected with the second covering plate by a second pin shaft; a third pin shaft is arranged on the hinged part of the first clamping plate and the second clamping plate; the clamping plate is connected with the lifting plate by the third pin shaft. The double-quality fly wheel lifting appliance can be used for reducing the labor intensity of an operator in lifting by effective supporting and limiting, so that the lifting production efficiency of the double-quality fly wheel is improved.

The invention relates to a hanging tool for precast concrete box beams. According to the scheme, the hanging tool for the precast concrete box beams comprises a beam. The beam is provided with two vertical positioning holes. The two vertical positioning holes are symmetrically arranged along the vertical section in the longitudinal direction of the beam. The two ends of the beam are correspondingly connected with vertical beams which are arranged below the beam. Vertical beams are provided with extruding blocks which are located below the beam. Extruding blocks are provided with vertical through holes which are matched with the vertical beams. The vertical beams are inserted into the vertical through holes on the extruding blocks through the lower ends of the vertical beams. A structure which enables the extruding blocks to move vertically on the vertical beams is formed. The extruding blocks are provided with fixing holes. The fixing holes are located under the positioning through holes. The side surfaces, close to the fixing holes, of the extruding blocks are inclined planes. An obtuse included angle is formed between the upper end surfaces of the inclined planes and the extruding blocks. The hanging tool for the precast concrete box beams is ingenious in structure and convenient and easy to operate, the problem of uneasy fixing of the precast concrete box beams before hanging is solved, meanwhile, the safety of hanging is improved, and by using the side surfaces of the precast concrete box beams as bearing surfaces, damages for the precast concrete box beams are low.

The invention relates to a quick lifting tool for concrete precast box beams. The tool comprises a cross beam; a vertical beam positioned under the cross beam is mounted at one end of the cross beam; a connecting block is mounted at the lower end of the vertical beam; an extrusion plate positioned below the cross beam is mounted on one side of the connecting block; the lower part of the extrusion plate is hinged to the connecting block by an articulated shaft; an arc positioning rod is mounted at the upper part of the extrusion plate; the connecting block is provided with an arc sliding chute matched with the positioning rod; the positioning rod is positioned in the sliding chute, and is provided with a positioning toothed groove; the positioning toothed groove consists of multiple longitudinal through holes distributed in the radian direction of the positioning rod; and the connecting block is provided with a locking pin inserted in the corresponding longitudinal through hole. The tool is skilful in structure and convenient in operation, solves the problem of difficult placement of steel wire ropes or other lifters at the bottoms of the concrete precast box beams before lifting of the concrete precast box beams, and meanwhile, improves the lifting safety; and side surfaces of the concrete precast box beams are used as bearing surfaces, so that the damage to the concrete precast box beams is lower.

The invention discloses an integral lifting tool for an anode roasting fire wall, which has the advantage of better safety. The integral lifting tool comprises a lower wall support, an upper wall clamping plate and a pre-pressing mechanism, wherein the pre-pressing mechanism is connected between the upper wall clamping plate and the lower wall support, and a wall body containing space is defined by the upper wall clamping plate and the lower wall support; the pre-pressing mechanism comprises a left frame rod and a right frame rod, the left frame rod and the right frame rod are arranged in a bilateral symmetry way, wherein the upper ends of the left frame rod and the right frame rod are connected with a hanging connecting rod through rotation shafts, and the hanging connecting rod can be rotatably connected with the upper wall clamping plate; the lower ends of the left frame rod and the right frame rod are respectively and rotatably connected with the lower wall support, wherein the lower rotation connecting point positioned on the lower end is positioned outside the upper rotation connecting point positioned on the upper end; lifting points of a lifting mechanism are distributed by a lifting point distributing mechanism to sub-lifting points formed in the middle parts of the left frame rod and the right frame rod; and during lifting, the gravity of a wall body is driven by the pre-pressing mechanism, so that the upper wall clamping plate trends to move to the lower wall support to clamp the fire wall between the upper wall clamping plate and the lower wall support. The integral lifting tool has the advantages of simple and clever structure, stability and reliability.