Pre-embedded connecting piece for prestressed concrete electric pole and sectional type electric pole applying pre-embedded connecting piece
By installing protective steel rings on the joints in the middle section of prestressed concrete poles, the problem of easy corrosion between the steel plate splice rings or flanges and the concrete contact surface is solved, extending the service life of the poles and improving safety.
Patent Information
- Application Number
- CN202520384623.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-06
AI Technical Summary
When existing prestressed concrete poles are used in the field, gaps easily form between the steel plate splice ring or flange and the concrete contact surface, leading to corrosion. This affects the durability and safety of the poles, and can easily cause water seepage and corrosion of the prestressed main reinforcement, resulting in safety accidents such as pole collapse.
A protective steel ring is installed on the middle section joint to move its contact position with the concrete upward and fix it by welding. This increases the corrosion time and improves the connection strength. After a gap is formed between the protective steel ring and the concrete contact surface, it will be the first to be corroded, reducing the possibility of corrosion of the prestressed main reinforcement and enhancing the durability and safety of the joint.
This extends the service life of prestressed concrete poles, reduces the incidence of pole collapse accidents, and improves the durability and safety of poles.
Smart Images
Figure CN223880864U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to prestressed concrete pole production technical field, especially relates to a prestressed concrete pole pre -buried connecting piece and sectional type pole of application thereof. BACKGROUND
[0002] With the rural power grid reconstruction and mobile communication construction of our country, the production and application of concrete pole have got the rapid development. Concrete pole has two kinds of ordinary reinforced concrete pole and prestressed concrete pole, wherein the manufacturing process of prestressed concrete pole is that first steel bar is woven into steel framework according to design requirement, then the steel framework is vertically tensioned and prestressed in steel mould, under the action of centrifugal force, concrete is poured on the steel framework, finally the prestressed concrete pole can be obtained after the solidification of concrete, the prestressed concrete pole produced by the above-mentioned mode saves steel material than ordinary reinforced concrete pole, and can improve the crack resistance and service life.
[0003] At present, the length of prestressed concrete pole is generally 6-21m, due to the fact that the place of erecting pole is mostly wild, under the limitation of road transportation condition in wild field, the pole above 12m is mostly transported in sectional mode, and the end of pole to be connected is pre-buried with steel plate adapter ring or flange plate during the production of pole, then the adjacent two poles are assembled into whole pole through welding or bolt assembly after the sectional pole is transported to installation site. However, the whole prestressed pole assembled by the above-mentioned two modes, due to the fact that the pre-buried steel plate adapter ring or flange plate and the concrete of pole are two different materials, in the actual use process, the joint surface of steel plate adapter ring or flange plate and concrete is easy to produce gap due to the influence of temperature difference change and environment, the end surface of steel plate adapter ring or flange plate is easy to be eroded by water, the concrete at the gap position is expanded to form wider and deeper water penetration channel, and then the main prestressed reinforcement in the pole near the position is easy to be eroded, which leads to the reduction of strength of concrete pole near the steel plate adapter ring or flange plate, affects the durability and safety of pole, and causes the pole to collapse and other safety accidents during the power maintenance operation. SUMMARY
[0004] In order to overcome the problems in the background art, the utility model provides a prestressed concrete pole pre-buried connecting piece, which can increase the corrosion time of pre-buried connecting piece, improve the connection strength of pole end and pre-buried connecting piece, and effectively improve the service life of cement pole.
[0005] The utility model provides a prestressed concrete electric pole pre -buried connecting piece, including pre -buried in the middle section joint spare of electric pole end, the one end of middle section joint spare is equipped with the protective steel ring with electric pole contact, the outer surface of protective steel ring is flush with the outside wall of electric pole, the one end of protective steel ring is higher than the one end of middle section joint spare and electric pole contact away from middle section joint spare.
[0006] Further, the middle section joint spare is a steel plate adapter ring, the protective steel ring is fixed on the outer side surface or the upper end surface of the steel plate adapter ring, and the side wall thickness of the protective steel ring is less than the side wall thickness of the steel plate adapter ring.
[0007] Further, the inner side wall of the steel plate adapter ring is provided with a hanging tendon plate, and the prestressed main tendon in the electric pole is fixedly connected to the hanging tendon plate.
[0008] Further, the middle section joint spare is a flange plate, the flange plate comprises an upper ring plate, an inner steel ring and a lower ring plate connected in sequence from top to bottom, and the protective steel ring is fixed on the outer side surface or the upper end surface of the upper ring plate.
[0009] Further, the upper ring plate is provided with a first tendon hole, and the prestressed main tendon in the electric pole is fixedly connected to the lower end surface of the upper ring plate after passing through the first tendon hole.
[0010] Further, the protective steel ring is fixedly welded to the middle section joint spare.
[0011] Further, the hanging tendon plate is provided with a second tendon hole, and the prestressed main tendon in the electric pole is fixedly connected to the hanging tendon plate after passing through the second tendon hole.
[0012] Further, the lower end surface of the steel plate adapter ring is provided with an inclined surface, and the inclined surface is inclined downward from the outer side surface of the steel plate adapter ring.
[0013] The utility model also provides a sectional electric pole using any one of the prestressed concrete electric pole pre -buried connecting piece, which is formed by butt joint of at least two electric poles, and the end of the adjacent electric poles is provided with the pre -buried connecting piece, and the two opposite pre -buried connecting pieces are fixedly connected.
[0014] Compared with the prior art, the prestressed concrete electric pole pre -buried connecting piece has the following beneficial effects:
[0015] (1)The utility model discloses a protective steel ring is set up on the middle joint spare, and the middle joint spare and the concrete contact position are moved to the upper end of protective steel ring, when the gap of protective steel ring and the concrete contact surface is produced, the upper end surface of the protective steel ring with the small thickness of side wall is first corroded, then is corroded along the end of protective steel ring and goes down, increases the corrosion fracture time of pole pre -buried connecting piece, also makes the maintenance personnel easy to observe the corrosion condition, and through setting up this protective steel ring, also makes the concrete between the middle joint spare and protective steel ring more dense under the centrifugal force, improves the bonding strength between the middle joint spare and the pole, prolongs the service life of prestressed concrete pole, reduces the incidence of safety accidents such as pole collapse.
[0016] (2)The utility model discloses a protective steel ring is set up on the outside of steel sheet adapter ring or the upper end surface, and the protective steel ring and the concrete protective layer thickness between the prestressed main reinforcement in the pole are thickened compared with the original steel sheet adapter ring and the concrete protective layer thickness between the prestressed main reinforcement in the pole, reduces the possibility that the prestressed main reinforcement near the steel sheet adapter ring and the concrete contact surface is corroded and fractured. When the gap of protective steel ring and the concrete contact surface is produced, the upper end surface of the protective steel ring is first corroded, then continues to corrode along the height direction of protective steel ring and goes down to the steel sheet adapter ring, finally again corrodes along the end surface of steel sheet adapter ring and goes inwards, only then will lead to the corrosion of prestressed main reinforcement, greatly reduce the possibility that the prestressed main reinforcement is corroded and fractured, improve the durability and safety of the pole.
[0017] (3)The utility model discloses a protective steel ring is set up on the outside of flange plate ring plate or the upper end surface, not only reduces the corrosion speed of flange plate, but also makes the concrete between protective steel ring and upper ring plate more dense under the centrifugal force, thereby improves the connecting strength between flange plate and the end of pole, effectively slows down the weathering speed of concrete at this contact position, improves the service life of prestressed concrete pole. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the drawing needed to use in the embodiment or prior art description simple introduction, obviously, below description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.
[0019] Figure 1 It is cross section structure schematic diagram that steel sheet adapter ring is pre -buried in the pole in prior art;
[0020] Figure 2 It is cross section structure schematic diagram that flange plate is pre -buried in the pole in prior art;
[0021] Figure 3 A cross-section structure schematic view of the protective steel ring arranged on the outer side of the steel plate adapter ring in the embedded connecting piece of the utility model is shown in the figure;
[0022] Figure 4 A cross-section structure schematic view of the protective steel ring arranged on the upper side of the steel plate adapter ring in the embedded connecting piece of the utility model is shown in the figure;
[0023] Figure 5 A cross-section structure schematic view of the protective steel ring arranged on the outer side of the ring plate of the flange in the embedded connecting piece of the utility model is shown in the figure;
[0024] Figure 6 A cross-section structure schematic view of the protective steel ring arranged on the upper end face of the ring plate of the flange in the embedded connecting piece of the utility model is shown in the figure;
[0025] Wherein: 1 - middle joint piece, 2 - protective steel ring, 3 - electric pole, 4 - steel plate adapter ring, 41 - hanging rib plate, 410 - second hanging rib hole, 42 - bevel, 5 - prestressed main rib, 6 - flange, 61 - upper ring plate, 610 - first hanging rib hole, 62 - inner steel ring, 63 - lower ring plate, 64 - reinforcing rib plate. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor are within the protection scope of the utility model.
[0027] The utility model will be described in detail below with reference to the drawings. Figures 1 to 6 and specific embodiments.
[0028] The utility model provides a kind of prestressed concrete electric pole embedded connecting piece, including middle joint piece 1 embedded in the end of electric pole, the end of middle joint piece 1 and electric pole 3 contact is equipped with protective steel ring 2, the outer surface of protective steel ring 2 is flush with the outer side wall of electric pole 3, the end of protective steel ring 2 away from middle joint piece 1 is higher than the end of middle joint piece 1 and electric pole 3 contact.
[0029] Specifically, Figure 1 and Figure 2The thickness of the concrete protection layer between the prestressed main reinforcement 5 in the electric pole 3 and the outer wall of the electric pole 3 is W, in the production process of the prestressed concrete electric pole, the prestressed main reinforcement 5 in the steel reinforcement framework is fixed on the middle joint piece 1 after being longitudinally tensioned, a steel mold which is flush with the outer wall of the middle joint piece 1 is arranged on the outer side of the middle joint piece 1, under the action of the centrifugal force, the concrete is poured on the steel reinforcement framework, and the prestressed concrete electric pole can be obtained after the concrete is solidified. Figure 1 And Figure 2 It can be known that the contact surface between the middle joint piece 1 and the electric pole concrete is point A in the figure, in the use process of the electric pole, since the material of the middle joint piece 1 is different from that of the electric pole concrete, a gap is easily generated at this position, and the end surface of the middle joint piece 1 is corroded inwards from this position, so that the prestressed main reinforcement 5 near the position is easily corroded, and the durability and safety of the electric pole 3 are affected.
[0030] Specifically, referring to Figures 3-6 The protective steel ring 2 is welded and fixed with the middle joint piece 1, the structural strength of the protective steel ring 2 and the middle joint piece 1 is firm through the welding mode, the processing is convenient and good in implementation, and the investment cost is low.
[0031] Specifically, referring to Figures 3-6 The distance H between the end of the protective steel ring 2 away from the middle joint piece 1 and the end of the middle joint piece 1 contacting the electric pole 3 is 15mm-25m. Preferably, the distance H between the end of the protective steel ring 2 away from the middle joint piece 1 and the end of the middle joint piece 1 contacting the electric pole 3 is 20mm.
[0032] The prestressed concrete electric pole pre-buried connecting piece moves the contact position between the middle joint piece 1 and the concrete to the upper end of the protective steel ring 2, when a gap is generated at the contact surface A between the protective steel ring 2 and the concrete, the upper end surface of the protective steel ring 2 with a small side wall thickness is first corroded, then the corrosion is along the end of the protective steel ring 2 downwards until the middle joint piece 1, the corrosion time of the electric pole pre-buried connecting piece is increased, the corrosion condition at the position is easily observed by the maintenance personnel, so that the maintenance measures can be taken in time, meanwhile, the concrete between the middle joint piece 1 and the protective steel ring 2 is more dense under the action of the centrifugal force, the bonding strength between the middle joint piece 1 and the electric pole 3 is improved, and the service life of the prestressed concrete electric pole is prolonged.
[0033] Specifically, referring to Figures 3-4 In an embodiment, the middle joint piece 1 is a steel plate butt joint ring 4, the protective steel ring 2 is fixed on the outer side or the upper end surface of the steel plate butt joint ring 4, and the side wall thickness of the protective steel ring 2 is smaller than that of the steel plate butt joint ring 4. Referring toFigure 1 In actual production, the side wall thickness T1 of the steel plate connecting ring 4 is generally 10 mm, and the thickness W of the concrete protection layer between the inner prestressed reinforcement 5 of the pole 3 and the outer side wall of the pole 3 is required to be not less than 15 mm in the national standard. However, in the prior art, the concrete thickness between the inner side wall of the steel plate connecting ring 4 and the inner prestressed reinforcement 5 of the pole 3 is only 5 mm. When the upper end surface of the steel plate connecting ring 4 is corroded at the concrete contact position A, the inner prestressed reinforcement 5 of the pole 3 is corroded only after the concrete protection layer of 5 mm depth is further eroded inwardly, which causes the inner prestressed reinforcement 5 of the pole 3 to be easily corroded and broken, thereby causing the pole to collapse and a safety accident, and greatly reducing the durability of the pole. In the utility model, the protective steel ring 2 with a small side wall thickness is arranged on the outer side surface or the upper end surface of the steel plate connecting ring 4, so that the thickness of the concrete protection layer between the protective steel ring 2 and the inner prestressed reinforcement 5 of the pole 3 is thicker than the thickness of the concrete between the original steel plate connecting ring 4 and the inner prestressed reinforcement 5 of the pole 3, and the actual effective concrete protection layer thickness of the prestressed reinforcement at the position is increased. When a gap is generated between the protective steel ring 2 and the concrete, the upper end surface of the protective steel ring 2 is first corroded, and then the steel plate connecting ring 4 is further corroded downward along the height direction of the protective steel ring 2, and finally the inner prestressed reinforcement 5 is corroded inwardly along the end surface of the steel plate connecting ring 4, which causes the inner prestressed reinforcement 5 to be corroded, greatly reduces the possibility of the inner prestressed reinforcement 5 being corroded and broken, and improves the durability and safety of the pole 3. In the embodiment, the thickness T2 of the protective steel ring 2 is 3 mm-5 mm. Preferably, the thickness T2 of the protective steel ring 2 is 3 mm, and the thickness of the concrete protection layer between the inner side wall of the protective steel ring 2 and the inner prestressed reinforcement 5 of the pole 3 is 12 mm, which reduces the possibility of the prestressed reinforcement near the steel plate connecting ring and the concrete contact surface being corroded and broken, greatly improves the durability and safety of the pole, and has the advantages of being simple in structure, low in cost, and easy to be popularized and applied.
[0034] Specifically, refer to Figure 1 , Figures 3-4 In the embodiment, the inner side wall of the steel plate connecting ring 4 is provided with a hanging tendon plate 41, and the inner prestressed reinforcement 5 of the pole 3 is fixedly connected to the hanging tendon plate 41. The prestressed reinforcement 5 is fixed by the hanging tendon plate 41, which is simple in construction and has good bonding strength.
[0035] Specifically, refer to Figures 3-4 In the embodiment, the lower end surface of the steel plate connecting ring 4 is provided with an inclined surface 42, and the inclined surface 42 is inclined downward from the outer side surface of the steel plate connecting ring 4. The inclined surface 42 facilitates the welding of the two oppositely arranged steel plate connecting rings 4 by the construction personnel.
[0036] Specifically, refer to Figures 3-4In the embodiment, the second hanging bar hole 410 is arranged on the hanging bar plate 41, and the prestressed main bar 5 in the electric pole 3 is fixedly connected with the hanging bar plate 41 after passing through the second hanging bar hole 410. The prestressed main bar 5 is upset at the end of the steel bar after passing through the second hanging bar hole 410 and is fixed on the lower end surface of the hanging bar plate 41, and the operation is simple and the structure is reliable.
[0037] Specifically, referring to Figures 5-6 In another embodiment, the middle section joint piece 1 is a flange plate 6, the flange plate 6 comprises an upper ring plate 61, an inner steel ring 62 and a lower ring plate 63 connected in sequence from top to bottom, and the protective steel ring 2 is fixed on the outer side surface or the upper end surface of the upper ring plate 61, and the upper ring plate 61, the inner steel ring 62 and the lower ring plate 63 are welded and fixed together. In the prior art, referring to Figure 2 The upper end surface of the upper ring plate 61 is directly in plane contact with the lower end surface of the electric pole concrete, and the concrete between the upper ring plate 61 and the side wall close to the lower end surface of the electric pole concrete is easily weathered and damaged during use of the electric pole, and then further corrosion to the inside of the electric pole 3 is caused. The utility model sets the protective steel ring 2 on the outer side surface or the upper end surface of the upper ring plate 61 of the flange plate 6, so that the corrosion point A is moved to the upper end surface of the protective steel ring 2, and corrosion is carried out downward after corrosion of the upper end surface of the protective steel ring 2, which not only reduces the corrosion speed of the flange plate 6, but also forms an L-shaped angle between the upper end surface of the upper ring plate 61 and the inner side wall of the protective steel ring 2, so that the concrete between the protective steel ring 2 and the upper ring plate 61 is more compactly poured under the action of the centrifugal force during production of the electric pole, and the connection strength between the flange plate 6 and the end portion of the electric pole 3 is improved, the weathering speed of the concrete at the contact position is effectively slowed down, and the service life of the prestressed concrete electric pole is improved.
[0038] Specifically, referring to Figures 5-6 In the embodiment, the first hanging bar hole 610 is arranged on the upper ring plate 61, and the prestressed main bar 5 in the electric pole 3 is fixedly connected with the lower end surface of the upper ring plate 61 after passing through the first hanging bar hole 610. The prestressed main bar 5 is upset at the end of the steel bar after passing through the first hanging bar hole 610 and is fixed on the lower end surface of the upper ring plate 61, and the operation is simple and the structure is reliable.
[0039] The utility model also provides a sectional electric pole using any one prestressed concrete electric pole pre-buried connecting piece, which is formed by butt joint of at least two electric poles 3, and the end portions of the adjacent electric poles 3 are provided with the pre-buried connecting pieces, the two oppositely arranged pre-buried connecting pieces are fixedly connected, and the fixation is realized by welding or bolt connection according to the types of the pre-buried connecting pieces, which is not limited here. The sectional electric pole comprises all the technical solutions of the prestressed concrete electric pole pre-buried connecting piece and at least has all the advantages of the prestressed concrete electric pole pre-buried connecting piece, which will not be repeated here.
[0040] The utility model is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be understood as the limitation of the essence and scope of the utility model, and various modifications made by the ordinary skilled in the art after reading the above embodiments all belong to the range protected by the utility model.
Claims
1. A pre-stressed concrete pole pre-embedded connector, characterized in that, The utility model provides a pre-embedded connecting piece for electric pole, which comprises a middle joint piece embedded in the end of an electric pole, and a protective steel ring arranged on the end of the middle joint piece in contact with the electric pole.
2. The pre-stressed concrete pole pre-embedded connector according to claim 1, characterized in that, The middle joint piece is a steel plate butt joint ring, and the protective steel ring is fixed on the outer side surface or the upper end surface of the steel plate butt joint ring.
3. The pre-stressed concrete pole pre-embedded connector according to claim 2, characterized in that, The inner side wall of the steel plate butt joint ring is provided with a hanging tendon plate, and the prestressed main tendon in the electric pole is fixedly connected to the hanging tendon plate.
4. The pre-stressed concrete pole pre-embedded connector of claim 1, wherein, The middle joint piece is a flange plate, which comprises an upper ring plate, an inner steel ring and a lower ring plate connected in sequence from top to bottom, and the protective steel ring is fixed on the outer side surface or the upper end surface of the upper ring plate.
5. The pre-stressed concrete pole pre-embedded connector of claim 4, wherein, The upper ring plate is provided with a first tendon hole, and the prestressed main tendon in the electric pole is fixedly connected to the lower end surface of the upper ring plate after passing through the first tendon hole.
6. The pre-stressed concrete pole pre-embedded connector of claim 1, wherein, The protective steel ring is fixedly welded to the middle joint piece.
7. The pre-stressed concrete pole pre-embedded connector of claim 3, wherein, The hanging tendon plate is provided with a second tendon hole, and the prestressed main tendon in the electric pole is fixedly connected to the hanging tendon plate after passing through the second tendon hole.
8. The pre-stressed concrete pole pre-embedded connector of claim 2, wherein, The lower end surface of the steel plate butt joint ring is provided with an inclined surface inclined downward from the outer side surface of the steel plate butt joint ring.
9. A segmented pole using the pre-stressed concrete pole pre-buried connector according to any one of claims 1-8, characterized in that, The utility model provides a pre-embedded connecting piece for electric pole, which comprises a middle joint piece embedded in the end of an electric pole, and a protective steel ring arranged on the end of the middle joint piece in contact with the electric pole. The middle joint piece is a steel plate butt joint ring, and the protective steel ring is fixed on the outer side surface or the upper end surface of the steel plate butt joint ring. The inner side wall of the steel plate butt joint ring is provided with a hanging tendon plate, and the prestressed main tendon in the electric pole is fixedly connected to the hanging tendon plate. The middle joint piece is a flange plate, which comprises an upper ring plate, an inner steel ring and a lower ring plate connected in sequence from top to bottom, and the protective steel ring is fixed on the outer side surface or the upper end surface of the upper ring plate. The upper ring plate is provided with a first tendon hole, and the prestressed main tendon in the electric pole is fixedly connected to the lower end surface of the upper ring plate after passing through the first tendon hole. The protective steel ring is fixedly welded to the middle joint piece. The hanging tendon plate is provided with a second tendon hole, and the prestressed main tendon in the electric pole is fixedly connected to the hanging tendon plate after passing through the second tendon hole. The lower end surface of the steel plate butt joint ring is provided with an inclined surface inclined downward from the outer side surface of the steel plate butt joint ring. The utility model provides a pre-embedded connecting piece for electric pole, which comprises a middle joint piece embedded in the end of an electric pole, and a protective steel ring arranged on the end of the middle joint piece in contact with the electric pole. The middle joint piece is a steel plate butt joint ring, and the protective steel ring is fixed on the outer side surface or the upper end surface of the steel plate butt joint ring. The inner side wall of the steel plate butt joint ring is provided with a hanging tendon plate, and the prestressed main tendon in the electric pole is fixedly connected to the hanging tendon plate. The middle joint piece is a flange plate, which comprises an upper ring plate, an inner steel ring and a lower ring plate connected in sequence from top to bottom, and the protective steel ring is fixed on the outer side surface or the upper end surface of the upper ring plate. The upper ring plate is provided with a first tendon hole, and the prestressed main tendon in the electric pole is fixedly connected to the lower end surface of the upper ring plate after passing through the first tendon hole. The protective steel ring is fixedly welded to the middle joint piece. The hanging tendon plate is provided with a second tendon hole, and the prestressed main tendon in the electric pole is fixedly connected to the hanging tendon plate after passing through the second tendon hole. The lower end surface of the steel plate butt joint ring is provided with an inclined surface inclined downward from the outer side surface