Abstract: A scissors type vertical elevated substructure. The base and the surface of the substructure are articulated through folding legs. The nodes of the legs are articulated through connection rods and form double parallelograms which are mirror images and share a common base. There is a guide device on the base. Lifting sheaves are installed on both the surface of the substructure and the top of the guide. One end of the lifting wireline is fixed on the nodes of the folding legs and the other end of the wireline runs around the lifting sheaves in a given order to connect with the drawworks. The guide pulley sits in the vertical elevated guide-rail which is set on the guide device. The support rod is fixed to the base, the surface, and the folding legs.

Abstract: A vertically elevated gate mast with open front that is divided into multiple sections and is assembled section by section from bottom to the top. The first section is an integrated structure, and 2nd to nth sections are divided into a left part and a right part. Each left and right part is assembled by connecting front upright posts, back upright posts, upper beams, lower beams and brace rods. Corresponding left and right parts are then connected with back beams and brace rods to form each section with beams and brace rods at the left, right and back sides. Lifting and lowering of the mast is realized by drawworks. Installation is performed from the ground, by assembling the left parts and the right parts with the back beams and the brace rods into a shape of gate, and then lifting each section as a whole with a crane.

Abstract: A vertically elevated gate mast with open front that is divided into multiple sections and is assembled section by section from bottom to the top. The first section is an integrated structure, and 2nd to nth sections are divided into a left part and a right part. Each left and right partis assembled by connecting front upright posts, back upright posts, upper beams, lower beams and brace rods. Corresponding left and right parts are then connected with back beams and brace rods to form each section with beams and brace rods at the left, right and back sides. Lifting and lowering of the mast is realized by drawworks. Installation is performed from the ground, by assembling the left parts and the right parts with the back beams and the brace rods into a shape of gate, and then lifting each section as a whole with a crane.

Abstract: A scissors type vertical elevated substructure. The base and the surface of the substructure are articulated through folding legs. The nodes of the legs are articulated through connection rods and form double parallelograms which are mirror images and share a common base. There is a guide device on the base. Lifting sheaves are installed on both the surface of the substructure and the top of the guide. One end of the lifting wireline is fixed on the nodes of the folding legs and the other end of the wireline runs around the lifting sheaves in a given order to connect with the drawworks. The guide pulley sits in the vertical elevated guide-rail which is set on the guide device. The support rod is fixed to the base, the surface, and the folding legs.