Connecting tool for partial prestress electric pole production

Abstract

The utility model relates to a connecting tool for partial prestress electric pole production, which comprises a tensioning disc connected with a plurality of steel bars, and further comprises a connecting nut connected on the tensioning disc through a fixing bolt, the connecting nut is pre-buried in concrete, the connecting nut extends to the inner end face of the tensioning disc, and the steel bars are arranged on the tensioning disc. The end of the steel bar is installed in the connecting nut, the connecting nut comprises a shell, a threaded hole is formed in the shell, the fixing bolt is in threaded connection in the threaded hole, a pier head groove is formed in the shell, the end of the steel bar is installed in the pier head groove, the steel bar comprises a bar body, and pier heads are connected to the two ends of the bar body. According to the prestressed steel bar tensioning device, the steel bar and the tensioning disc are connected through the connecting nut, the prestressed steel bar does not need to be cut off and released after demolding, and only the bolt needs to be detached.

Description

Technical Field

[0001] The utility model relates to the technical field of partially prestressed electric poles, in particular to the field of electric pole production, and specifically refers to a connecting tool for producing partially prestressed electric poles. Background Art

[0002] Concrete poles refer to poles made of concrete and steel bars or steel wires. There are two types of concrete poles: ordinary reinforced concrete poles and prestressed concrete poles. Prestressed poles are made of concrete and have internal prestressed reinforcement. They are mainly used for overhead transmission lines above 35 kV. Prestressing saves steel compared to ordinary poles, and partially prestressed poles are a type of pole tower between prestressed poles and non-prestressed poles. Their design combines the advantages of prestressed poles and non-prestressed poles. The steel skeleton of partially prestressed poles is composed of prestressed steel wires and ordinary steel bars. Its production cost is low, and its strength and toughness are better than ordinary non-prestressed poles. Partially prestressed poles have good crack resistance and load-bearing capacity, and are suitable for occasions where overhead lines need to bear large loads. In addition, ordinary steel bars can be configured in the longitudinal force-bearing steel bars of partially prestressed poles to increase their crack resistance and load-bearing capacity.

[0003] During the production process, some prestressed poles need to be prestressed and stretched to improve their crack resistance and bearing capacity. In the prior art, poles that do not use flanges need to cut off the excess steel bars after the stretching is completed. This process is cumbersome and the cut steel bars will also cause waste. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a connecting tool for producing a partially prestressed electric pole. A connecting nut is used to connect a steel rod and a tensioning plate. After demoulding, the prestressed steel rod does not need to be cut or tensioned, and only the bolts need to be removed.

[0005] The utility model is realized through the following technical scheme, which provides a connection tool for the production of partially prestressed electric poles, including a tensioning disk, wherein the tensioning disk is connected to a plurality of steel bars, and also includes a connecting nut connected to the tensioning disk by a fixing bolt, the connecting nut is pre-embedded in concrete, the connecting nut extends to the inner end surface of the tensioning disk, the end of the steel bar is installed in the connecting nut, the connecting nut includes a shell, a threaded hole is provided in the shell, the fixing bolt is threadedly connected in the threaded hole, a pier head groove is provided in the shell, and the end of the steel bar is installed in the pier head groove.

[0006] The utility model connects the tensioning plate and the steel rod by arranging a connecting nut, the connecting nut is located in the concrete pouring area, and the connecting nut is retained in the pole after the concrete is poured. After demoulding, the steel rod does not need to be cut off to release the tension, and only the fixing bolt needs to be removed. The threaded hole of the connecting nut is used for threaded connection of the fixing bolt, and the pier head groove is used for connecting the steel rod.

[0007] As an optimization, the steel rod includes a rod body, two ends of the rod body are connected to pier heads, the diameter of the pier heads is larger than the diameter of the rod body, the pier head groove is connected to a through groove, the diameter of the through groove is smaller than the pier head, the rod body passes through the through groove, and the pier head is installed in the pier head groove. The setting of this optimization scheme can make the pier head stuck in the pier head groove, thereby limiting the axial displacement of the steel rod.

[0008] As an optimization, an external thread is provided on the outer end surface of the shell, and the external thread extends from the left end of the shell to the right end of the shell. The setting of this optimization scheme can make the connection nut and concrete more firmly combined, making it less likely to have steel bar shrinkage and preventing the rod body concrete from longitudinal cracking.

[0009] As an optimization, the connecting nut is cylindrical, and the threaded hole, the pier head groove, and the through groove are coaxially arranged. The arrangement of this optimization scheme facilitates the threading of the steel rod.

[0010] As an optimization, the fixing bolt extends to the pier head, and the inner end surface of the fixing bolt fits with the outer end surface of the pier head. The setting of this optimization scheme can make the fixing bolt press the two ends of the steel rod, and further limit the position of the steel rod.

[0011] The beneficial effects of the utility model are as follows: the electric pole needs to tension the prestressed steel rod, and the connecting nut of the utility model can connect the steel rod and the tensioning plate, so that after demoulding, the prestressed steel rod does not need to be cut and tensioned, and only the fixing bolt needs to be removed, and the connecting nut will remain in the electric pole permanently. An external thread is arranged on the outside of the connecting nut, so that the connection nut and the concrete are more firmly combined, making it less likely to have steel bar shrinkage, thereby preventing longitudinal cracks in the pole body concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a connection diagram of the utility model;

[0014] Figure 3 It is a cross-sectional view of the connecting nut;

[0015] Figure 4 It is a side view of the connecting nut;

[0016] Figure 5 This is the side view of the finished pole;

[0017] As shown in the figure:

[0018] 1. Tensioning plate, 2. Fixing bolt, 3. Connecting nut, 31. Shell, 32. Threaded hole, 33. Pier head groove, 34. Through groove, 35. External thread, 4. Steel rod, 41. Rod body, 42. Pier head, 5. Steel cage. DETAILED DESCRIPTION

[0019] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0020] like Figures 1 to 5 The utility model shown is a connecting tool for producing a partially prestressed electric pole, including a tensioning disk 1, which is a prior art. The tensioning disk 1 is a tool for fixing steel bars and maintaining their position during tensioning. The tensioning disk 1 is cylindrical, extending in the left-right direction, and provided with a plurality of bolt holes, which extend in the left-right direction and are evenly distributed along the circumference of the tensioning disk 1. The tensioning disk is connected to a plurality of steel bars 4, which extend in the left-right direction, and one end of the steel bars 4 is provided with a tensioning disk 1, and the other end of the steel bars 4 is provided with a steel hoop, and the steel bar 4 is fixedly connected to the steel hoop, and the steel hoop is fixedly connected with Rebars, several steel bars are evenly distributed along the circumference of the tensioning disk 1, the steel bars and steel bars are alternately distributed, the steel bars are evenly distributed along the circumference of the tensioning disk, the positions of the steel bars correspond to the positions of the bolt holes, a steel cage 5 is welded on the steel bar 4, the steel bar 4, the steel cage 5, and the steel bars are arranged in cooperation to form a steel skeleton, several steel bars are internally welded with the steel cage 5, the steel bar includes a rod body 41, the rod body 41 extends in the left and right directions, and both ends of the rod body 41 are connected to pier heads 42, the pier head 42 is spherical, and the pier head 42 is integrally formed with the rod body 41, and the end of the steel bar is upset by a hydraulic upsetting machine to process the pier head 42, and the diameter of the pier head 42 is larger than the diameter of the rod body 41.

[0021] The present embodiment also includes a connecting nut 3 connected to the tensioning disk 1 by a fixing bolt 2. The fixing bolt 2 is threadedly connected to the tensioning disk 1. The fixing bolt 2 extends in the left-right direction. A plurality of fixing bolts are provided. The number of the fixing bolts 2 is consistent with the number of the bolt holes. The fixing bolt 2 is threadedly connected in the bolt hole. The head of the fixing bolt 2 is located at the outer end of the tensioning disk. The inner end of the fixing bolt extends to the inner side of the tensioning disk 1. The inner side is a side of the fixing bolt close to the steel rod. The area where the steel skeleton is located is the pouring area. The steel skeleton is placed in a mold to complete the pouring, and the fixing bolt extends into the pouring area.

[0022] The connecting nut 3 is threadedly connected to the fixing bolt 2. The connecting nut 3 extends in the left and right directions. The connecting nut 3 is pre-buried in the concrete, that is, the connecting nut 3 is located in the pouring area. The left end face of the connecting nut 3 is in contact with the right end face of the tensioning disk 1. The connecting nut extends to the inner end face of the tensioning disk 1. The inner end of the fixing bolt extends out of the tensioning disk and is completely located in the connecting nut. The end of the steel rod is installed in the connecting nut 3.

[0023] like Figure 4As shown, the connecting nut 3 is cylindrical, and the left and right ends of the connecting nut are chamfered 2×45°. The connecting nut is made of 28 round steel. The connecting nut includes a shell 31, and the shell 31 extends in the left and right directions. The outer end surface of the shell 31 is in contact with the inner end surface of the tensioning disk 1. A threaded hole 32 is opened in the shell, and the threaded hole 32 extends in the left and right directions. The inner diameter of the threaded hole is larger than the diameter of the pier head 42. The threaded hole 32 is coaxially arranged with the bolt hole, and the fixing bolt 2 is threadedly connected in the threaded hole, and the part of the inner end of the fixing bolt extending out of the tensioning disk 1 is completely located in the threaded hole 32.

[0024] A pier head groove 33 is provided in the shell body, and the pier head groove is located at the inner side of the threaded hole 32. The pier head groove 33 is coaxially arranged with the threaded hole 32, and the diameter of the pier head groove is the same as the diameter of the threaded hole. The pier head groove 33 extends in the left and right directions, and the pier head groove 33 is connected with a through groove 34, and the through groove 34 extends in the left and right directions. The through groove 34 extends from the inner end surface of the shell body 31 to the pier head groove 33, and the through groove 34 is coaxially arranged with the pier head groove 33. The diameter of the through groove 34 is smaller than the pier head 42. The connection between the pier head groove 33 and the through groove 34 is chamfered to facilitate the transition. The inner wall of the through groove 34 fits with the outer wall of the steel rod, and the rod body 41 passes through the through groove 34. The pier head 42 is installed in the pier head groove 33, so that the end of the steel rod is installed in the pier head groove 33, and the fixing bolt extends to the pier head 42, and the inner end surface of the fixing bolt 2 fits with the outer end surface of the pier head 42, and the fixing bolt presses the pier head 42.

[0025] An external thread 35 is provided on the outer end surface of the shell, and the external thread 35 extends from the left end of the shell 31 to the right end of the shell 31. The setting of the external thread 35 can make the connection nut 3 more firmly combined with the concrete, making it less likely to have steel bar shrinkage, and preventing longitudinal cracks in the rod body concrete.

[0026] During use of this embodiment, the steel rod 4 is passed through the through groove 34 of the connecting nut 3, the connecting nut 3 is sleeved on the steel rod 4, and the steel rod is cold-forged to form pier heads 42 at both ends of the steel rod. The connecting nut 3 is moved to the end where the tensioning disk 1 is provided, so that the pier head 42 is located in the pier head groove 33 of the connecting nut 3, the connecting nut 3 is aligned with the bolt hole, the fixing bolt 2 is passed through the bolt hole and threadedly connected with the connecting nut 3, the fixing bolt 2 presses the pier head 42, and the outer end face of the connecting nut 3 is tightly fitted with the inner end face of the tensioning disk. The combined steel skeleton, connecting nut, and tensioning disk are placed in a mold. When the tensioning pouring is completed, demoulding is performed. After demoulding, the fixing bolt 2 is unscrewed, the tensioning disk is removed, and the connecting nut 3 is permanently left in the live pole, and the outer end face of the connecting nut is flush with the outer end face of the pole.

[0027] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A connection tool for producing partially prestressed electric poles, comprising a tensioning plate (1), to which a plurality of steel bars (4) are connected, characterized in that: It also includes a connecting nut (3) connected to the tensioning disk (1) through a fixing bolt (2), the connecting nut (3) is pre-buried in concrete, the connecting nut extends to the inner end surface of the tensioning disk (1), the end of the steel rod is installed in the connecting nut (3), the connecting nut includes a shell (31), a threaded hole (32) is provided in the shell, the fixing bolt (2) is threadedly connected in the threaded hole, the shell is provided with a pier head groove (33), and the end of the steel rod is installed in the pier head groove (33).

2. A connection tool for producing partially prestressed electric poles according to claim 1, characterized in that: The steel rod comprises a rod body (41), two ends of the rod body (41) are connected to pier heads (42), the diameter of the pier heads (42) is larger than the diameter of the rod body (41), the pier head groove (33) is connected to a through groove (34), the diameter of the through groove (34) is smaller than the pier head (42), the rod body (41) passes through the through groove (34), and the pier head (42) is installed in the pier head groove (33).

3. The connection tool for producing partially prestressed electric poles according to claim 1, characterized in that: An external thread (35) is provided on the outer end surface of the shell, and the external thread (35) extends from the left end of the shell (31) to the right end of the shell (31).

4. The connecting tool for producing partially prestressed electric poles according to claim 2, characterized in that: The connecting nut (3) is cylindrical, and the threaded hole (32), the pier head groove (33), and the through groove (34) are coaxially arranged.

5. The connection tool for producing partially prestressed electric poles according to claim 2, characterized in that: The fixing bolt extends to the pier head (42), and the inner end surface of the fixing bolt (2) is in contact with the outer end surface of the pier head (42).

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