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A production process and technology for utility poles, applied in the field of prefabricated components of cement products, can solve problems such as complex production process, high production cost, and loss of prestress, and achieve the effects of ensuring accuracy, large tension, and reducing crack resistance
Active Publication Date: 2016-09-28
BEIHAI JINGYI CONCRETE PROD
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[0005] However, the poles produced by the above-mentioned process have complicated manufacturing process and high production cost. During the construction stage, the prestress loss due to factors such as stress relaxation, temperature difference concrete shrinkage, and creep
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Embodiment 1
[0035] Such as Figure 1 to Figure 4 As shown, the process of this embodiment is mainly used to produce φ190×12m electric poles, including the following steps:
[0036] S1: Straighten, lengthen and cut the high-strength tendons to form the main rib 1, the number of which is 14, the tensile strength of the main rib 1 is ≥ 1570Mpa, and the maximum elongation is 0.56%. Changhe pier head, the verticality of the shear end face of the main reinforcement 1 is ≤3°, the sheared burr and flash are ≤0.3mm, the length is fixed twice, and the relative error of its length does not exceed 1.5 / 10000 of the length of the steel bar. Head diameter: Ф8±0.1 mm, thickness: 8±0.1mm, strength ≥1491Mpa, heading deflection ≤0.3mm. ;
[0037] S2: Arrange a group of main ribs 1 distributed around the axis according to the size and taper of the proposed pole, and then weld a group of erection rings 4 evenly spaced along its axial direction on the inner side. The plane of the erection rings 4 is perpendi...
Embodiment 2
[0046] The difference from Example 1 is that the process of this example is mainly used to produce φ130×6m electric poles, including the following steps:
[0047] S1: Straighten, lengthen and cut high-strength tendons to form main tendons 1 with 6 tendons. Changhe pier head, the verticality of the shear end face of the main reinforcement 1 is ≤3°, the sheared burr and flash are ≤0.3mm, the length is fixed twice, and the relative error of its length does not exceed 1.5 / 10000 of the length of the steel bar. Head diameter: Ф8±0.1 mm, thickness: 8±0.1mm, strength ≥1491Mpa, heading deflection ≤0.3mm;
[0048] S2: Arrange a group of main ribs 1 distributed around the axis according to the size and taper of the proposed pole, and then weld a group of erection rings 4 evenly spaced along its axial direction on the inner side. The plane of the erection rings 4 is perpendicular to the skeleton axis and vertical The deviation shall not exceed 1 / 40 of the diameter of the erecting ring. T...
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Abstract
The invention relates to the field of cement product prefabricated parts, in particular to a telegraph pole production process. The telegraph pole production process is characterized in that the process includes the following steps that high-strength ribs are straightened and subjected to fixed length treatment and shearing, and main ribs are formed; a set of main ribs distributed around the axis are arranged, a set of erecting rings at equal intervals are welded on the inner sides in the axial direction of the main ribs, a conical rebar framework is formed, and rib hanging disks are installed at the two ends of the rebar framework; spiral ribs are arranged in the whole-length range of the rebar framework and bound firmly with iron wires; the rebar framework is pre-tensioned, and a plurality of circles of cushion blocks are arranged on the surface at equal intervals; the rebar framework is hoisted into a telegraph pole steel mold base, mold assembly is performed after concrete slurry is poured in, tensioning is performed, and then the centrifuging process is performed; and a telegraph pole formed after centrifuging is hoisted into a steaming pond to be subjected to steaming, natural curing is performed after steaming of the telegraph pole ends, and demolding is performed. The telegraph pole production process can improve the strength and the prestress performance of the telegraph pole; and meanwhile, steel materials can be saved, waste of concrete is reduced, and the production cost is reduced.
Description
technical field [0001] The invention relates to the field of cement product prefabricated components, in particular to a production process for utility poles. Background technique [0002] At present, land resources in small and medium-sized cities are in short supply, distribution line corridors are becoming more and more tense, and cable lines are difficult to popularize due to high cost. Reinforced concrete poles are more economical than steel pipe poles and iron towers, and the later maintenance is simple. It has significant advantages in medium application, so it is still widely used in substation structure and supporting transmission and distribution lines. At present, the production process of concrete poles at home and abroad basically adopts the centrifugal process, followed by atmospheric steam curing. By applying prestress to the steel bars in the concrete, the rigidity and strength of reinforced concrete poles can be improved. In recent years, the innovation and...
Claims
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