Large-span ring-shaped concrete pole segmented prefabrication splicing production equipment

Abstract

This invention provides a production equipment for segmented prefabrication and splicing of large-span circular concrete poles, relating to concrete poles. This equipment includes a reinforcing cage constituting the pole's skeleton, a mold for placing the reinforcing cage, and flanges connected to both ends of the reinforcing cage and inserted into the mold. The reinforcing cage includes a base cage formed by reinforcing bars wound and fixedly connected around the outer ring of vertical foundation reinforcing bars, and prestressed tension reinforcing bars inserted into the base cage between adjacent vertical foundation reinforcing bars. This equipment, by pre-setting the base cage formed by the reinforcing bars wound and fixedly connected around the outer ring of vertical foundation reinforcing bars and installing the vertical foundation reinforcing bars during the flange installation process, and by using the tension flanges to achieve prestressing of the reinforcing cage, is more convenient than applying external stress after the entire reinforcing cage is formed, while also preventing deformation of the reinforcing cage at the joints.

Description

Technical Field

[0001] This invention relates to concrete poles, specifically a production equipment for segmented prefabrication and splicing of large-span ring-shaped concrete poles. Background Technology

[0002] The span of a concrete pole refers to the horizontal distance between the conductor suspension points of two adjacent poles. Increasing the span of concrete poles primarily involves enhancing the pole's bending / pull-out resistance, reinforcing the pole base, reducing conductor tension, and optimizing sag. For optimizing the pole itself, a common technical solution is to use high-strength poles with flange connections.

[0003] Flange-connected high-strength poles refer to poles prefabricated into several segments of varying lengths, connected by pre-embedded flanges and nuts. The internal reinforcing steel skeleton typically employs a "partially prestressed" design, combining prestressed steel bars (such as spiral ribbed steel wire) with ordinary hot-rolled ribbed steel bars (such as threaded steel). This combination utilizes prestressing technology to improve the pole's crack resistance and stiffness while ensuring sufficient toughness and bending strength through ordinary steel bars.

[0004] During the fabrication of prestressed tension poles, prestress needs to be applied to the prestressed steel bars. After the steel bars are connected to other steel bars, the application of prestress will cause overall deformation, and the connection parts will also deform. For example, at the connection between non-stressed steel bars and spiral steel bars, the weld joint may fall off due to tension. At the same time, how to achieve concrete solidification while maintaining prestress is also a challenge. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a segmented prefabrication and splicing production equipment for large-span annular concrete poles, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a segmented prefabrication and splicing production equipment for large-span annular concrete poles, comprising a reinforcing cage constituting the pole's skeleton, a mold for placing the reinforcing cage, and flanges connected to both ends of the reinforcing cage and inserted into the mold. The reinforcing cage includes a base cage formed by reinforcing bars wound and fixedly connected around the outer ring of vertical foundation reinforcing bars, and prestressed tensile reinforcing bars inserted into the base cage between adjacent vertical foundation reinforcing bars. The flanges include a blind plate portion embedded in the concrete and connected to the reinforcing cage, and a flange ring located on the outer side of the concrete. The blind plate portion is provided with a protruding ring that inserts into the edge of the mold, one end of which is designated as the fixed end and the other end as the tensile end. The vertical foundation reinforcing bars and prestressed tensile reinforcing bars are connected at the connection between the fixed end and the blind plate portion. Each part is provided with a protrusion to restrict its movement toward the tension end. The prestressed tension steel bar is provided with a threaded part at the tension end, and nuts are threadedly connected to both sides of the blind plate. The nut on the side closer to the fixed end is in close contact with the blind plate, and the nut on the side farther from the fixed end is adjusted to be in close contact with the blind plate after the prestress is applied. The vertical foundation steel bar is slidably connected to the blind plate at the tension end. The inner ring of the flange is threadedly connected to a sealing plate that is spliced ​​with the mold to form a closed space. The mold is divided into upper and lower groups. The outer surfaces of the upper and lower molds are provided with a fixed ring formed by splicing, and a transverse connecting plane located at the contact surface of the upper and lower molds. The upper and lower groups of the mold are divided into a short part near the tension end and another long part. The short part and the long part are connected by a flange half-ring with the same diameter as the fixed ring.

[0007] Preferably, the reinforcing cage further includes a support ring disposed on the outer surface of the vertical foundation reinforcing bars, and the prestressed tensile reinforcing bars are slidably connected to the support ring.

[0008] The fixed connecting steel bar deforms at the contact point with the prestressed tensile steel bar, and the prestressed tensile steel bar crosses through the inner and outer rings of the fixed connecting steel bar.

[0009] Preferably, the blind plate portion at the fixed end is provided with a notch with an opening pointing inwards, and the vertical foundation steel bars and prestressed tension steel bars are sleeved inside the notch. The blind plate portion at the tension end is provided with an adjustment portion with an opening pointing outwards, and the nut is adjusted from the adjustment portion.

[0010] Preferably, the blind plate section is provided with multiple layers, and a semi-open reinforcing support is provided between adjacent blind plate sections at the outer ring of the vertical foundation steel bars and prestressed tensile steel bars.

[0011] Preferably, the threaded portion of the prestressed tensile steel bar is connected to the foundation by welding, and the distance from the starting end of the thread to the welding connection position is greater than three times the diameter of the threaded portion.

[0012] Preferably, the flange portion is provided with a prestressing application unit, which includes a fixing part for temporarily fixing the fixed end and a displacement part for displacement after being connected to the tension end. The displacement part includes a support sleeve fitted on the inner ring of the flange portion and a traction moving part fitted on the outer ring of the support sleeve for traction displacement of the tension end flange portion.

[0013] Preferably, the fixed connecting steel bars are arranged at equal intervals on the outer surface of the vertical foundation steel bars in a circumferential manner.

[0014] Preferably, the fixed connection steel bars are arranged in a spiral form on the outer surface of the vertical foundation steel bars.

[0015] Preferably, the connection method between the fixed connecting steel bars and the vertical foundation steel bars is welding.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This large-span ring concrete pole segmented prefabrication and splicing production equipment forms a foundation cage by pre-setting vertical foundation steel bars and fixing the outer ring of connecting steel bars. The vertical foundation steel bars are installed during the flange installation process. The steel cage is prestressed by stretching the flange. This is more convenient than applying external stress after the overall steel cage is formed, and at the same time, it avoids deformation of the steel cage at the connection.

[0017] 2. This large-span circular concrete pole segmented prefabrication and splicing production equipment divides the mold into two parts of different lengths. It can be adapted to the process of installing the reinforcing cage into the mold to apply prestress and then pouring concrete. During the application of prestress, the prestressed tensile steel bars in the reinforcing cage deform, that is, part of the reinforcing cage grows in the mold. By splicing, the return to its original position after growth can be restricted, so that prestress can be formed after the concrete is poured.

[0018] 3. In this large-span annular concrete pole segmented prefabrication and splicing production equipment, the fixed connecting steel bar deforms at the contact position with the prestressed tensile steel bar, and the prestressed tensile steel bar crosses through the inner and outer rings of the fixed connecting steel bar, thus forming an inner and outer protrusion, forming a ring between the two winding distances, restricting the radial movement of the prestressed tensile steel bar, and at the same time forming a ring, which facilitates the insertion of the prestressed tensile steel bar into the foundation cage.

[0019] 4. In this large-span ring concrete pole segmented prefabrication and splicing production equipment, the fixed connecting steel bars are equidistantly arranged on the outer surface of the vertical foundation steel bars in a complete circle. The fixed connecting steel bars are wrapped around the outer circle of the vertical foundation steel bars to form a complete circle, and lapped wrapping is formed at the interface. This connection method allows for the mass production of fixed connecting steel bars and the pre-treatment of bending at each position.

[0020] 5. The segmented prefabrication and splicing production equipment for this large-span ring concrete pole has a notch with an opening pointing inwards on the blind plate at the fixed end. The vertical foundation steel bars and prestressed tensile steel bars are sleeved inside the notch. In this way, during the installation process, it is only necessary to clamp from the center to both sides, which improves the installation efficiency.

[0021] 6. In this large-span circular concrete pole segmented prefabrication and splicing production equipment, the prestressed tensile steel bars have threaded ends. The threaded ends of the prestressed tensile steel bars are connected to the foundation via welding, and the distance from the starting end of the thread to the welding connection position is greater than three times the diameter of the threaded end. This avoids affecting the thread strength due to welding. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the mold components of the present invention. Figure 3 This is a schematic diagram of the mold closing according to the present invention; Figure 4 This is a schematic diagram of the prestressing application unit of the present invention; Figure 5 This is a schematic diagram of the reinforcing cage of the present invention; Figure 6 This is a schematic diagram of the bending of the reinforcing bars for fixing the reinforcing cage according to the present invention; Figure 7 This is a schematic diagram of the flange connection of the present invention; Figure 8 This is a schematic diagram showing the connection between the flange and the reinforcing cage of the present invention; Figure 9 This is a half-sectional schematic diagram of the flange portion of the present invention; Figure 10 This is a schematic diagram of the connection between the flange and the prestressed steel bar of the present invention.

[0023] In the diagram: 1. Reinforcing cage; 2. Mold; 3. Flange section; 101. Vertical foundation reinforcement; 102. Fixed connection reinforcement; 103. Prestressed tension reinforcement; 301. Blind flange section; 302. Flange ring; 303. Nut; 304. Sealing plate; 201. Fixing ring; 202. Lateral connection plane; 203. Short section; 204. Flange half ring; 205. Long section; 104. Support ring; 4. Prestressing application unit; 41. Displacement section; 411. Support sleeve; 412. Traction moving section. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0026] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0028] like Figure 1-10 As shown, a segmented prefabrication and splicing production equipment for a large-span annular concrete pole includes a steel cage 1 that forms the pole's skeleton, a mold 2 for placing the steel cage 1, and a flange 3 connected to both ends of the steel cage 1 and inserted into the mold 2. The steel cage 1 includes a base cage formed by steel bars 102 that are fixedly connected to the outer ring of vertical foundation steel bars 101, and prestressed tensile steel bars 103 inserted in the base cage between adjacent vertical foundation steel bars 101. In the process of making the steel cage 1, the shape is first determined by the base cage, and then the prestressed tensile steel bars 103 are installed during the connection with the flange 3, instead of directly generating the prestressed tensile steel bars 103 and the base cage at the same time. The steel cage 1 also includes a support ring 104 disposed on the outer surface of the vertical foundation steel bars 101. The prestressed tensile steel bars 103 are slidably connected to the support ring 104. The support ring 104 can restrict the position of the steel bars, prevent the vertical steel bars from being eccentric, and guide the sliding of the prestressed tensile steel bars 103.

[0029] The flange portion 3 includes a blind plate portion 301 embedded in the concrete and connected to the reinforcing cage 1, and a flange ring 302 located on the outside of the concrete. The blind plate portion 301 is provided with a protruding ring that inserts into the edge of the mold 2, one end of which is named the fixed end and the other end is named the tension end. The vertical foundation steel bar 101 and the prestressed tension steel bar 103 are both provided with a protrusion at the connection between the fixed end and the blind plate portion 301 to restrict their movement toward the tension end. The part of the protrusion can be welded or a threaded protrusion. In order to facilitate installation, the blind plate portion 301 at the fixed end is provided with a notch with an opening pointing inward. The vertical foundation steel bar 101 and the prestressed tension steel bar 103 are sleeved inside the notch. In this way, during the installation process, it is only necessary to snap it from the center to both sides, which improves the installation efficiency.

[0030] The prestressed tension steel bar 103 has a threaded portion at its tension end. This threaded portion is connected to the foundation via welding, and the distance from the starting end of the thread to the weld connection is greater than three times the diameter of the thread. During welding, heat treatment occurs at the material contact point, which may result in insufficient strength. Therefore, it is necessary to limit the start and end of the threaded portion. Furthermore, the connection can be subjected to quenching heat treatment after welding to improve its strength.

[0031] Nuts 303 are threadedly connected to both sides of the blind plate portion 301. The blind plate portion 301 at the stretching end is provided with an adjustment portion with an opening facing outward. The nuts 303 are adjusted from the adjustment portion. By restricting the adjustment from the outer ring, it is easier to adjust from the outer ring after stretching, which is more convenient than adjusting the nuts 303 from the inner ring.

[0032] The nut 303 near the fixed end is tightly attached to the blind plate part 301. In this way, when prestress is applied, the base part of the prestressed tensile steel bar 103 can be prestressed by stretching the blind plate part 301. The nut 303 away from the fixed end is adjusted to be tightly attached to the blind plate part 301 after the prestress is applied. After the prestress is applied, the prestress is locked by rotating the nut 303 on this side. The vertical foundation steel bar 101 is slidably connected to the blind plate part 301 at the stretching end. The inner ring of the flange part 3 is threadedly connected to a sealing plate 304 that is spliced ​​with the mold 2 to form a closed space. The sealing plate 304 prevents concrete leakage during centrifugal molding and is opened during curing to allow steam curing inside.

[0033] The mold 2 is divided into upper and lower groups. The outer surfaces of the upper and lower mold 2 are provided with a fixing ring 201 formed by splicing, and a transverse connecting plane 202 located on the contact surface of the upper and lower mold 2, as well as other auxiliary forming components, such as pouring gates.

[0034] The upper and lower sets of the mold 2 are both divided into a short part 203 near the stretching end and another long part 205. The short part 203 and the long part 205 are connected by a flange half ring 204 with the same diameter as the fixing ring 201. The long part 205 is closed when the steel cage 1 is connected to the flange part 3. The short part 203 is closed after the steel cage 1 is prestressed. After the closure is completed, a closed space is formed.

[0035] The mold 2 is divided into two parts, long and short, which can be adapted to the process of installing the steel cage 1 into the mold 2 for tensioning and applying prestress, and then pouring concrete. During the process of applying prestress, the prestressed tensile steel bar 103 in the steel cage 1 deforms, that is, part of the steel cage 1 grows in the mold 2. By splicing, the return to its original position after growth can be restricted, so that prestress can be formed after pouring concrete.

[0036] The fixed connecting steel bar 102 deforms at the contact position with the prestressed tension steel bar 103. The prestressed tension steel bar 103 crosses through the inner and outer rings of the fixed connecting steel bar 102, thus forming an inner and outer protrusion. A ring is formed between the two winding distances, which restricts the radial movement of the prestressed tension steel bar 103. At the same time, the ring facilitates the insertion of the prestressed tension steel bar 103 into the foundation cage.

[0037] The blind plate part 301 is provided with multiple layers. A semi-open reinforcing support is provided between adjacent blind plate parts 301 at the outer ring of the vertical foundation steel bar 101 and the prestressed tensile steel bar 103. The function of the reinforcing support and adjustment part is to locally improve the strength of the blind plate part 301 and prevent the blind plate part 301 from deforming during the application of prestress.

[0038] The flange portion 3 is provided with a prestressing application unit 4, which includes a fixing part for fixing the fixed end when it is at zero. This part can be a frame for temporarily fixing the mold 2. And a displacement part 41 that is connected to the tension end and then moves. The displacement part 41 determines the displacement length by reinforcement to provide sufficient prestress. The displacement part 41 includes a support sleeve 411 that is sleeved on the inner ring of the flange part 3. The support sleeve 411 supports the flange part 3 and guides the flange part 3 to move. And a traction moving part 412 that is sleeved on the outer ring of the support sleeve 411 to pull the tension end flange part 3 to move. The traction moving part 412 can be a hydraulic telescopic cylinder.

[0039] The fixed connecting steel bars 102 are equidistantly arranged on the outer surface of the vertical foundation steel bars 101 in a complete circle. The fixed connecting steel bars 102 are wrapped around the outer circle of the vertical foundation steel bars 101 to form a complete circle, and lapped wrapping is formed at the joint. This connection method allows for the mass production of fixed connecting steel bars 102 and the pre-treatment of bending at each position.

[0040] The fixed connecting steel bar 102 is arranged in a spiral form on the outer surface of the vertical foundation steel bar 101. This implementation method has a low installation cost. With the help of a welding mechanism, the fixed connecting steel bar 102 and the vertical foundation steel bar 101 are connected by welding, which can quickly achieve the connection. However, the part that forms the ring needs to be formed one by one in the later stage, which reduces the work efficiency.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0042] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production equipment for segmented prefabrication and splicing of large-span annular concrete poles, comprising a steel cage (1) constituting the pole's skeleton, a mold (2) for placing the steel cage (1), and flange portions (3) connected to both ends of the steel cage (1) and inserted into the mold (2), characterized in that: The steel cage (1) includes a base cage formed by a fixed connecting steel bar (102) wrapped around the outer ring of the vertical foundation steel bar (101), and a prestressed tensile steel bar (103) inserted in the base cage between adjacent vertical foundation steel bars (101). The flange (3) includes a blind plate (301) embedded in the concrete and connected to the reinforcing cage (1) and a flange ring (302) located on the outside of the concrete. The blind plate (301) is provided with a protruding ring that is inserted into the edge of the mold (2). One end is named the fixed end and the other end is named the tension end. The vertical foundation steel (101) and the prestressed tension steel (103) are provided with protrusions at the connection between the fixed end and the blind plate (301) to restrict their movement toward the tension end. The prestressed tension steel (103) is provided with a threaded part at the tension end, and nuts (303) are threadedly connected to both sides of the blind plate (301). The nut (303) on the side closer to the fixed end is in close contact with the blind plate (301), and the nut (303) on the side farther from the fixed end is adjusted to be in close contact with the blind plate (301) after the prestress is applied. The vertical foundation steel (101) is slidably connected to the blind plate (301) at the tension end. The inner ring of the flange (3) is threadedly connected to a sealing plate (304) that is spliced ​​with the mold (2) to form a closed space. The mold (2) is divided into upper and lower groups. The outer surfaces of the upper and lower molds (2) are provided with a fixed ring (201) formed by splicing, and a transverse connecting plane (202) located on the contact surface of the upper and lower molds (2). The upper and lower sets of the mold (2) are divided into a short part (203) near the stretching end and another long part (205). The short part (203) and the long part (205) are connected by a flange half ring (204) with the same diameter as the fixing ring (201).

2. The segmented prefabrication and splicing production equipment for large-span ring-shaped concrete poles according to claim 1, characterized in that: The steel cage (1) also includes a support ring (104) set on the outer surface of the vertical foundation steel bars (101), and the prestressed tensile steel bars (103) are slidably connected to the support ring (104).

3. The segmented prefabrication and splicing production equipment for large-span ring-shaped concrete poles according to claim 2, characterized in that: The fixed connecting steel bar (102) deforms at the contact position with the prestressed tensile steel bar (103), and the prestressed tensile steel bar (103) crosses through the inner and outer rings of the fixed connecting steel bar (102).

4. A segmented prefabrication and splicing production equipment for large-span ring-shaped concrete poles according to claims 1-3, characterized in that: The blind plate part (301) of the fixed end is provided with a notch with an opening pointing to the inner circle, and the vertical foundation steel bar (101) and the prestressed tensile steel bar (103) are sleeved inside the notch; The blind plate portion (301) at the stretching end is provided with an adjustment portion with an opening facing outwards, and the nut (303) is adjusted from the adjustment portion.

5. The segmented prefabrication and splicing production equipment for large-span ring-shaped concrete poles according to claim 4, characterized in that: The blind plate section (301) is provided with multiple layers, and a semi-open reinforcing support is provided between adjacent blind plate sections (301) on the outer ring of the vertical foundation steel bar (101) and the prestressed tensile steel bar (103).

6. The segmented prefabrication and splicing production equipment for large-span ring-shaped concrete poles according to claim 5, characterized in that: The threaded portion of the prestressed tensile steel bar (103) is connected to the foundation by welding, and the length from the starting end of the thread to the welding connection position is greater than three times the diameter of the threaded portion.

7. A segmented prefabrication and splicing production equipment for large-span ring-shaped concrete poles according to claim 5 or 6, characterized in that: The flange (3) is provided with a prestressing unit (4). The prestressing unit (4) includes a fixing part for temporarily fixing the fixed end and a displacement part (41) for displacement after being connected to the tension end. The displacement part (41) includes a support sleeve (411) sleeved on the inner ring of the flange (3) and a traction moving part (412) sleeved on the outer ring of the support sleeve (411) for traction of the tension end flange (3) to cause displacement.

8. The segmented prefabrication and splicing production equipment for large-span ring-shaped concrete poles according to claim 7, characterized in that: The fixed connecting steel bars (102) are arranged at equal intervals on the outer surface of the vertical foundation steel bars (101) in a circumference.

9. The segmented prefabrication and splicing production equipment for large-span ring-shaped concrete poles according to claim 7, characterized in that: The fixed connection steel bars (102) are arranged in a spiral form on the outer surface of the vertical foundation steel bars (101).

10. A segmented prefabrication and splicing production equipment for large-span ring-shaped concrete poles according to claim 8 or 9, characterized in that: The connection method between the fixed connection steel bar (102) and the vertical foundation steel bar (101) is welding.

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