CN-117259059-B - Rotary spraying clamping device for ductile cast iron pipe

CN117259059BCN 117259059 BCN117259059 BCN 117259059BCN-117259059-B

Abstract

The invention relates to a rotary spraying clamping device in the process of externally spraying a bell and spigot nodular cast iron pipe, which comprises a clamping driving mechanism, an inner center, an outer center, a top seat, a second top seat and a third top seat, wherein a groove allowing a shearing resistant member to be embedded is formed in the position, opposite to the outer center fixing hole 211, of the bottom of the outer center, the outer center is detachably connected with the inner center through the outer center fixing hole, a pore canal on the shearing resistant member and a shearing resistant member mounting groove, the second top seat bulge is in concave-convex fit with the second top seat pin groove, the second top seat is detachably connected with the top surface of a first top seat through the second top seat fixing hole, the third top seat is detachably connected with the top surface of the first top seat through the third top seat fixing hole, and bolt connection is completely anti-torsion converted into bulge or shearing resistant member conversion through a top connection bulge, a shearing resistant member connection bulge, a second top seat bulge, a third top seat shearing resistant bulge and the like, so that the service life of a bolt is prolonged.

Inventors

CHEN XIANGRU
XI JIE
WANG SONG
DU PENGYUAN
LIANG ZENGHUI
SONG JIANAN
LV XIAOFEI

Assignees

新兴河北工程技术有限公司

Dates

Publication Date: 20260512
Application Date: 20230921

Claims (2)

1. The utility model provides a rotatory spraying clamping device of nodular cast iron pipe which characterized in that includes: a ductile iron pipe (400); The clamping driving mechanism (100) is a driving mechanism which stretches linearly and rotates around the stretching direction and is positioned at two sides of the axial direction of the nodular cast iron pipe (400), and a center connecting part (110) is fixedly connected to the end part of the clamping driving mechanism (100) close to the nodular cast iron pipe (400) in the direction; The top connecting part bulge (111) is fixed on the top connecting part (110) and is a bulge facing the direction of the nodular cast iron pipe (400), or one side of the top connecting part (110) facing the nodular cast iron pipe (400) is provided with a top connecting part groove, and a rigid block protruding out of the top connecting part groove is detachably arranged in the top connecting part groove; The inner center (220) is an umbrella-shaped cone, and a groove which is concave inwards and matched with the protrusion (111) of the center connecting part is formed in the bottom surface of the inner center (220); The inner center (220) is provided with an inner center fixing hole (221) penetrating through the top surface and the bottom surface of the inner center (220), the center connecting part (110) is provided with a pore canal opposite to the inner center fixing hole (221), and the inner center (220) penetrates through the center connecting part (110) by means of the inner center fixing hole (221) and is detachably connected through a bolt; The top surface of the inner center (220) is also provided with an inward concave shear part mounting groove (2121), and the bottom of the shear part mounting groove (2121) is provided with a pore canal communicated with the bottom of the inner center (220); The outer center (210) is an umbrella-shaped cone, and a groove with the same or similar shape as the top surface of the inner center (220) is arranged at the bottom and sleeved outside the top surface of the inner center (220); the outer center fixing hole (211) is a hole channel penetrating through the top surface and the bottom surface of the outer center (210) and is opposite to the shearing-resistant member mounting groove (2121); the shearing resistant member (212) is a rigid wedge block, is provided with a pore canal which is opposite to the outer center fixing hole (211) and penetrates through the shearing resistant member (212); The outer center (210) is detachably connected with the inner center (220) by means of the outer center fixing hole (211), a pore canal on the shear resistant piece (212) and a shear resistant piece mounting groove (2121); when the inner center (220) is assembled with the outer center (210), one part of the shear-resistant piece (212) is positioned inside the outer center (210), and the other part of the shear-resistant piece is positioned inside the inner center (220); The outer center (210) or the inner center (220) is matched with the two axial ends of the ductile cast iron pipe (400), and the ductile cast iron pipe (400) is fixed and rotated by the clamping driving mechanism (100).
2. The apparatus according to claim 1, wherein the top surfaces of the inner and outer tips (220, 210) are inclined at an angle of 65 ° to 80 ° to the axis of the tube (400).

Description

Rotary spraying clamping device for ductile cast iron pipe Technical Field The invention relates to a rotary spraying clamping device, in particular to a rotary spraying clamping device in the process of externally spraying a bell and spigot nodular cast iron pipe. Background In the technical requirements of GB/T13295-2019 spheroidal graphite cast iron pipes, pipe fittings and accessories for water and gas, the pipes and the pipe fittings are usually delivered in an inner coating state and an outer coating state, the inner surface and the outer surface before coating are free of rust and sundries, the inner surface and the outer surface after coating are uniform and firm in adhesion, the abnormity caused by climate change is avoided, and the outer coating of the centrifugal spheroidal graphite cast iron pipe comprises a metallic zinc layer and a synthetic resin finishing layer which is covered on the metallic zinc layer and is compatible with zinc. A pushing rotary mechanism (application number: 201921354572.4) for zinc spraying of cast tube in the prior art discloses a rotary spraying clamping device in the zinc spraying process, which indicates that when zinc spraying of cast tube is carried out, a driving pushing main shaft and a driven pushing main shaft in the driving pushing rotary mechanism are required to move in opposite directions to clamp the cast tube and lock the cast tube, then the cast tube is driven to rotate, and then zinc spraying trolley performs zinc spraying. The inventor finds in the prior art that (1) because the clamping head is usually connected with the rotary mechanism through bolts before rotating at high speed and high torque, the bolts are easy to break and the service life is short, and (2) when flexible production (simultaneous threading of workpieces with different diameters) is performed, the pushing rotary assembly needs to be replaced frequently. Therefore, a rotary spraying clamping device for ductile cast iron pipes, which is suitable for flexible production and has long service life, is needed. Disclosure of Invention In order to solve the problems of short service life of bolts and lack of matching of flexible production components in the prior art, the direct bolt connection is changed into a form of a block structure for overcoming shearing force by utilizing a concave-convex matching form similar to key connection, and meanwhile, the matched structural form is additionally arranged on a single center structure, so that quick replacement is realized under the condition of simple disassembly. The invention adopts the technical scheme that the rotary spraying clamping device for the ductile cast iron pipe comprises the ductile cast iron pipe; The clamping driving mechanism is a driving mechanism which stretches linearly and rotates around the stretching direction and is positioned at two sides of the axial direction of the nodular cast iron pipe, and a center connecting part is fixedly connected to the end part of the clamping driving mechanism, which is close to the direction of the nodular cast iron pipe; the top connecting part is protruding and fixed on the top connecting part and is protruding towards the direction of the graphite cast iron pipe, or a top connecting part groove is formed in one side of the top connecting part towards the ductile cast iron pipe, and a rigid block protruding out of the top connecting part groove is detachably arranged in the top connecting part groove; The inner center is an umbrella-shaped cone, and the bottom surface of the inner center is provided with a groove which is concave inwards and is matched with the bulge of the center connecting part; The inner center is provided with an inner center fixing hole penetrating through the top surface and the bottom surface of the inner center, the center connecting part is provided with a pore canal opposite to the inner center fixing hole, and the inner center passes through the center connecting part by virtue of the inner center fixing hole and is detachably connected by virtue of a bolt; The top surface of the inner center is also provided with an inward concave shearing-resistant member mounting groove, and the bottom of the shearing-resistant member mounting groove is provided with a pore canal communicated with the bottom of the inner center; the outer center is an umbrella-shaped cone, and the bottom of the outer center is provided with a groove which is the same as or similar to the top surface of the inner center in shape and sleeved outside the top surface of the inner center; The outer center fixing hole is a hole channel penetrating through the top surface and the bottom surface of the outer center and is opposite to the shearing-resistant piece mounting groove in position; the shearing resistant member is a rigid wedge block, is provided with a pore canal which is opposite to the outer center fixing hole and penetrates through the shearing resistant member; The outer center