Wind power generation prefabricated concrete tower drum

Abstract

The utility model relates to the technical field of wind power, in particular to a wind power generation prefabricated concrete tower drum which comprises a plurality of tower sections which are sequentially connected up and down, and a positioning piece is arranged between every two adjacent tower sections up and down. Each tower section comprises four first connecting pieces and four second connecting pieces, the four first connecting pieces are arranged in an arc shape, and the first connecting pieces and the second connecting pieces are sequentially spliced and connected; prestressed tendons penetrate through the first connecting pieces and the second connecting pieces in the horizontal direction, an upper positioning section is formed on the upper portion of each first connecting piece, a first lower positioning section is formed on the lower portion of each first connecting piece, the upper positioning sections and the first lower positioning sections in every two adjacent tower sections are oppositely arranged and connected in an inserted mode, an upper guiding section is formed on the upper portion of each second connecting piece, and a lower guiding section is formed on the lower portion of each second connecting piece. The upper guide sections and the lower guide sections in two adjacent tower sections are oppositely arranged and are connected in an inserting manner; the positioning piece is fixedly connected with the connecting piece I or the connecting piece II through a bolt; the tower drum is convenient to assemble and construct, and the connecting strength of the tower drum in the horizontal direction can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power, and particularly relates to a precast concrete tower barrel for wind power generation. Background Art

[0002] The wind power tower barrel is the tower pole of wind power generation, which mainly plays a supporting role in the wind power generating set and absorbs the vibration of the unit at the same time. The wind power tower barrel is assembled by precast assembled concrete tower barrels. Most of the precast assembled concrete tower barrels adopt segmented and piecewise assembly. The weight and size of a single concrete component are small, and the transportation is convenient. Therefore, during the installation of the tower barrel using piecewise concrete components, it is necessary to connect adjacent precast components, and generally high-strength bolts are used for connection. Therefore, it is necessary to embed connection bolts in the precast components, and there are relatively high requirements for the shear resistance of the bolts under repeated loads.

[0003] In the existing precast concrete tower barrel, the splicing method between adjacent two concrete components usually adopts bolts, grouting, etc. After the construction and assembly of the tower barrel, affected by the self-weight of the tower barrel and the external environment, the connection strength in the horizontal direction at the joint of two tower sections is reduced. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a precast concrete tower barrel for wind power generation, which is convenient for assembly construction and can also improve the connection strength of the tower barrel in the horizontal direction.

[0005] The utility model provides the following technical solutions.

[0006] A precast concrete tower barrel for wind power generation includes a plurality of tower sections connected in sequence from top to bottom. A positioning member is arranged between two adjacent tower sections up and down; each tower section includes four connecting pieces one and four connecting pieces two. The four connecting pieces one are arranged in an arc shape, and the connecting pieces one and the connecting pieces two are assembled and connected in sequence; prestressed tendons are arranged horizontally through the connecting pieces one and the connecting pieces two. An upper positioning section is formed on the upper part of each connecting piece one, and a lower positioning section one is formed on the lower part. The upper positioning sections and the lower positioning sections one in two adjacent tower sections are arranged oppositely and are inserted and connected. An upper guiding section is formed on the upper part of each connecting piece two, and a lower guiding section is formed on the lower part. The upper guiding sections and the lower guiding sections in two adjacent tower sections are arranged oppositely and are inserted and connected; the positioning member is fixedly connected with the connecting piece one or the connecting piece two through bolts.

[0007] Preferably, the positioning member includes an outer insertion member, an inner insertion member, an outer arc-shaped insertion member and an inner arc-shaped insertion member. Four groups of the outer insertion member, the inner insertion member, the outer arc-shaped insertion member and the inner arc-shaped insertion member are provided. The outer insertion member and the inner insertion member are respectively located on the outer and inner sides of the upper positioning section, and the outer arc-shaped insertion member and the inner arc-shaped insertion member are respectively located on the outer and inner sides of the upper guiding section.

[0008] Preferably, a positioning groove is provided at the upper end of the upper positioning section, and a positioning block is provided at the lower end of the lower positioning section, and the positioning block is correspondingly plugged into the positioning groove in the adjacent tower section below; an embedded steel bar 1 is provided in the positioning groove, and the positioning block is provided with an embedded hole corresponding to the embedded steel bar 1.

[0009] Preferably, a guide groove is provided at the upper end of the upper guide section, and a guide block is provided at the lower end of the lower guide section, and the guide block is correspondingly plugged into the guide groove in the adjacent tower section below; two embedded steel bars are provided in the guide groove, and the guide block is provided with an embedded groove corresponding to the two embedded steel bars.

[0010] Preferably, the outer connector and the outer side of the adjacent lower positioning section above form a first gap, the inner connector and the inner side of the adjacent lower positioning section above form a second gap, the outer arc-shaped plug-in and the outer side of the adjacent lower guide section above form a third gap, the inner arc-shaped plug-in and the inner side of the adjacent lower guide section above form a fourth gap, and the first gap, the second gap, the third gap and the fourth gap are filled with slurry.

[0011] Preferably, a first connecting channel is arranged in parallel along the horizontal direction below the positioning grooves on the two relatively arranged connecting plates, and a second connecting channel is arranged in parallel along the horizontal direction below the positioning grooves on the other two relatively arranged connecting plates, the first connecting channel is located above the second connecting channel, and a first fixed channel is tangentially penetrated on one side of the upper guide section, and a second fixed channel is tangentially penetrated on the other side of the upper guide section.

[0012] Preferably, the first connecting channel on the connecting piece 1 is correspondingly connected to the first fixing channels on two adjacent connecting pieces 2 located on the same side, and linear prestressed tendons are penetrated inside.

[0013] Preferably, the second fixing channel on the connecting piece 1 is correspondingly connected to the second connecting channels on two adjacent connecting pieces 2 located on the same side, and a linear prestressed tendon is passed through the inside.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model provides a prefabricated concrete tower for wind power generation, which adopts a segmented structure. A positioning piece is arranged on each connecting piece 1 or connecting piece 2, so as to facilitate the rapid positioning and connection of the connecting piece 1 or connecting piece 2 of two adjacent tower sections, and can effectively improve the efficiency of hoisting construction. After four connecting pieces 1 and four connecting pieces 2 are assembled into a tower section according to corresponding steps, prestressed tendons are penetrated at the upper end of each side of the tower section, so as to improve the connection strength of the tower section in the horizontal direction.

[0016] A precast concrete tower barrel for wind power generation provided by the utility model has a positioning groove arranged at the upper end of the first connecting piece, and a guiding groove arranged at the upper end of the second connecting piece. The positioning groove and the guiding groove are communicated. When assembling the tower sections, a slurry is pre-laid in the positioning groove and the guiding groove. Under the action of the gravity of the tower sections, the slurry is extruded and flows to fill the gap at the joint of two adjacent tower sections, ensuring the continuity of the force on the tower sections, thereby enhancing the stability of the connection of the tower sections and making the concrete tower barrel safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the connection structure of a precast concrete tower barrel for wind power generation according to an embodiment of the present utility model;

[0019] Figure 2 It is a schematic diagram of the disassembled connection of the first connecting piece and the second connecting piece according to an embodiment of the present utility model;

[0020] Figure 3 It is a schematic cross-sectional view of the joint of the first connecting pieces of two tower sections according to an embodiment of the present utility model;

[0021] Figure 4 It is a schematic cross-sectional view of the middle part of the joint of the second connecting pieces of two tower sections according to an embodiment of the present utility model.

[0022] Reference numerals:

[0023] 1. First connecting piece; 11. Upper positioning section; 111. Positioning groove; 113. First connection channel; 114. Second connection channel; 12. Lower positioning section one; 121. Positioning block; 2. Second connecting piece; 21. Upper guiding section; 211. Guiding groove; 213. First fixing channel; 214. Second fixing channel; 22. Lower guiding section; 221. Guiding block; 3. Positioning member; 31. Outer plug-in member; 32. Inner plug-in member; 33. Outer arc-shaped plug-in member; 34. Inner arc-shaped plug-in member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Specific embodiments are as follows Figures 1-4As shown in the figure: A precast concrete tower barrel for wind power generation, comprising a plurality of tower sections connected in sequence from top to bottom, and a positioning member 3 is arranged between two adjacent tower sections up and down; each tower section includes four first connecting pieces 1 and four second connecting pieces 2. The four first connecting pieces 1 are arranged in an arc shape. The first connecting pieces 1 and the second connecting pieces 2 are assembled and connected in sequence, and the second connecting pieces 2 adopt an arc structure.

[0026] An upper positioning section 11 is formed at the upper part of each of the first connecting pieces 1, and a first lower positioning section 12 is formed at the lower part. The upper positioning section 11 and the first lower positioning section 12 in two adjacent tower sections are arranged oppositely. A positioning groove 111 is arranged at the upper end of the upper positioning section 11. First connecting channels 113 are arranged in parallel below the positioning grooves 111 on the opposite sides of the tower section, and second connecting channels 114 are arranged in parallel below the positioning grooves 111 on the other two sides of the tower section. The first connecting channels 113 and the second connecting channels 114 are both arranged in the horizontal direction, and the first connecting channels 113 are located above the second connecting channels 114. The first connecting channels 113 and the second connecting channels 114 are used for placing prestressed tendons; a positioning block 121 is arranged on the end face at the lower end of the first lower positioning section 12. The positioning block 121 is correspondingly matched with the positioning groove 111 in the adjacent tower section below. A plurality of first embedded steel bars are arranged in parallel in the positioning groove 111. The plurality of first embedded steel bars are arranged in two groups in parallel along the length direction of the positioning groove 111. A plurality of embedded holes are preset on the positioning block 121, and the plurality of embedded holes correspond to the plurality of first embedded steel bars one by one.

[0027] An upper guiding section 21 is formed at the upper part of each of the second connecting pieces 2, and a lower guiding section 22 is formed at the lower part. The upper guiding section 21 and the lower guiding section 22 in two adjacent tower sections are arranged oppositely. A guiding groove 211 is formed on the end face at the upper end of the upper guiding section 21. A first fixing channel 213 is arranged through tangentially on one side of the upper guiding section 21, and a second fixing channel 214 is arranged through tangentially on the other side. The first fixing channel 213 is correspondingly communicated with the first connecting channel 113, and the second fixing channel 214 is correspondingly communicated with the second connecting channel 114; a guiding block 221 is arranged on the end face at the lower end of the lower guiding section 22. A plurality of second embedded steel bars are arranged in parallel in the guiding groove 211. The plurality of second embedded steel bars are arranged in two groups in parallel along the guiding groove 211. Embedded grooves corresponding to the plurality of second embedded steel bars are preset on the guiding block 221. The guiding block 221 is correspondingly inserted into the guiding groove 211 in the adjacent tower section below, which is convenient for hoisting and positioning of two adjacent tower sections up and down.

[0028] The positioning member 3 includes an outer connector 31, an inner connector 32, an outer arc plug-in 33 and an inner arc plug-in 34, and the outer connector 31, the inner connector 32, the outer arc plug-in 33 and the inner arc plug-in 34 all adopt a T-shaped structure. The outer connector 31, the inner connector 32, the outer arc plug-in 33 and the inner arc plug-in 34 are arranged in four groups, and the four groups of outer connectors 31 and inner connectors 32 are respectively connected to the four connecting pieces 1, and the four groups of outer arc plug-ins 33 and inner arc plug-ins 34 are respectively connected to the four connecting pieces 2. The outer connector 31 is arranged at the upper end of the outer side of the upper positioning segment 11, and the outer connector 31 and the outer side of the adjacent lower positioning segment 12 are connected. The inner connector 32 is arranged at the upper inner end of the upper positioning section 11, and the inner connector 32 and the inner side of the adjacent lower positioning section 12 form a second gap. The outer arc plug-in 33 is arranged at the upper outer end of the upper guide section 21, and the outer arc plug-in 33 and the outer side of the adjacent lower guide section 22 form a third gap. The inner arc plug-in 34 is arranged at the upper inner end of the upper guide section 21, and the inner arc plug-in 34 and the inner side of the adjacent lower guide section 22 form a fourth gap. The lower parts of the outer connector 31 and the inner connector 32 are fastened to the upper positioning section 11 by bolts, and the outer arc plug-in 33 and the inner arc plug-in 34 are fastened to the upper guide section 21 by bolts.

[0029] During the overlapping construction of each tower section of the concrete tower, after the four connecting pieces 1 and the four connecting pieces 2 are spliced in a corresponding manner, the lower part of the positioning piece 3 is pre-fastened to the upper ends of the connecting pieces 1 and 2 by bolts, and linear prestressed tendons are penetrated on each side of the tower section. The prestressed tendons penetrated on one side of the tower section sequentially pass through the first fixing channel 213 and the first connecting channel 113 on the upper guide section 21 on the same side, and pass out from the matching first fixing channel 213. The prestressed tendons penetrated on the adjacent side of the tower section sequentially pass through the second fixing channel 214 and the second connecting channel 114 on the upper guide section 21 on the same side, and pass out from the matching second fixing channel 214, thereby enhancing the connection strength of the tower section in the horizontal direction.

[0030] When hoisting multiple tower sections of the concrete, slurry is pre-laid in the positioning groove 111 at the upper end of the first connecting piece 1 and the guiding groove 211 at the upper end of the second connecting piece 2. The lower positioning section 12 in the upper tower section is inserted and connected with the positioning groove 111 in the first connecting piece 1 located below through the positioning block 121. The first embedded steel bar is inserted into the corresponding embedded hole on the upper positioning block 121. The upper guiding section 21 is inserted and connected with the guiding groove 211 on the upper guiding section 21 in the second connecting piece 2 located below through the guiding block 221. The second embedded steel bar is inserted into the corresponding embedded groove on the upper guiding block 221. Based on the gravity of the tower section and the fluidity of the slurry, the tower section extrudes the slurry, and the slurry flows to fill the first gap, the second gap, the third gap, and the fourth gap, and the upper part of the positioning member 3 is fixedly connected to the first connecting piece 1 or the second connecting piece 2 through bolts. Wait for the slurry to stand and solidify, which ensures the continuity of the force on the tower section. The positioning member 3 can provide a certain supporting force for the tower barrel and at the same time increase the connection strength between two adjacent tower sections.

[0031] A precast concrete tower barrel for wind power generation provided by the utility model adopts a segmented structure, and positioning members are arranged on each first connecting piece or second connecting piece, which is convenient for the quick positioning connection of the first connecting piece or the second connecting piece of two adjacent upper and lower tower sections, and can effectively improve the hoisting construction efficiency; after four first connecting pieces and four second connecting pieces are assembled into a tower section according to the corresponding steps, prestressed tendons are arranged through the upper ends of each side of the tower section, which improves the connection strength in the horizontal direction of the tower section.

[0032] A precast concrete tower barrel for wind power generation provided by the utility model, the upper end of the first connecting piece is provided with a positioning groove, the upper end of the second connecting piece is provided with a guiding groove, the positioning groove and the guiding groove are communicated, and when the tower section is assembled, slurry is pre-laid in the positioning groove and the guiding groove. Under the action of the gravity of the tower section, the slurry is extruded and flows to fill the gap at the joint of two adjacent tower sections, which ensures the continuity of the force on the tower section, thereby enhancing the stability of the connection of the tower section and making the concrete tower barrel safer and more reliable.

Claims

1. A precast concrete tower barrel for wind power generation, characterized in that: It includes a plurality of tower sections connected successively from top to bottom, and a positioning member (3) is arranged between two adjacent tower sections; each tower section includes four first connecting pieces (1) and four second connecting pieces (2), the four first connecting pieces (1) are arranged in an arc shape, and the first connecting pieces (1) and the second connecting pieces (2) are assembled and connected in sequence; prestressing tendons are arranged horizontally through the first connecting pieces (1) and the second connecting pieces (2), an upper positioning section (11) is formed on the upper part of each first connecting piece (1), and a first lower positioning section (12) is formed on the lower part, the upper positioning sections (11) and the first lower positioning sections (12) in two adjacent tower sections are arranged oppositely and are inserted and connected, an upper guiding section (21) is formed on the upper part of each second connecting piece (2), and a lower guiding section (22) is formed on the lower part, the upper guiding sections (21) and the lower guiding sections (22) in two adjacent tower sections are arranged oppositely and are inserted and connected; the positioning member (3) is fixedly connected to the first connecting piece (1) or the second connecting piece (2) by bolts.

2. The precast concrete tower barrel for wind power generation according to claim 1, wherein: The positioning member (3) includes an outer insertion member (31), an inner insertion member (32), an outer arc-shaped insertion member (33) and an inner arc-shaped insertion member (34), and four groups of the outer insertion member (31), the inner insertion member (32), the outer arc-shaped insertion member (33) and the inner arc-shaped insertion member (34) are arranged, the outer insertion member (31) and the inner insertion member (32) are respectively located on the outer and inner sides of the upper positioning section (11), and the outer arc-shaped insertion member (33) and the inner arc-shaped insertion member (34) are respectively located on the outer and inner sides of the upper guiding section (21).

3. A precast concrete tower barrel for wind power generation according to claim 1, characterized in that: A positioning groove (111) is opened at the upper end of the upper positioning section (11), a positioning block (121) is arranged at the lower end of the first lower positioning section (12), and the positioning block (121) is correspondingly inserted into the positioning groove (111) in the adjacent lower tower section; a first embedded steel bar is arranged in the positioning groove (111), and a pre-embedded hole corresponding to the first embedded steel bar is opened in the positioning block (121).

4. The precast concrete tower barrel for wind power generation according to claim 3, characterized in that: A guiding groove (211) is opened at the upper end of the upper guiding section (21), a guiding block (221) is arranged at the lower end of the lower guiding section (22), and the guiding block (221) is correspondingly inserted into the guiding groove (211) in the adjacent lower tower section; a second embedded steel bar is arranged in the guiding groove (211), and a pre-embedded groove corresponding to the second embedded steel bar is opened in the guiding block (221).

5. A precast concrete tower barrel for wind power generation according to claim 2, characterized in that: A first gap is formed between the outer insertion member (31) and the outer side of the first lower positioning section (12) of the adjacent upper tower section, a second gap is formed between the inner insertion member (32) and the inner side of the first lower positioning section (12) of the adjacent upper tower section, a third gap is formed between the outer arc-shaped insertion member (33) and the outer side of the lower guiding section (22) of the adjacent upper tower section, and a fourth gap is formed between the inner arc-shaped insertion member (34) and the inner side of the lower guiding section (22) of the adjacent upper tower section, and the first gap, the second gap, the third gap and the fourth gap are filled with slurry.

6. A precast concrete tower barrel for wind power generation according to claim 4, characterized in that: A first connection channel (113) is arranged in parallel along the horizontal direction below the positioning grooves (111) on the two oppositely arranged connection plates (1), and a second connection channel (114) is arranged in parallel along the horizontal direction below the positioning grooves (111) on the other two oppositely arranged connection plates (1), the first connection channel (113) is located above the second connection channel (114), one side of the upper guide section (21) is tangentially penetrated by the first fixing channel (213), and the other side of the upper guide section (21) is tangentially penetrated by the second fixing channel (214).

7. A precast concrete tower barrel for wind power generation according to claim 6, characterized in that: The first connection channel (113) on the connection plate 1 (1) is correspondingly connected to the first fixing channels (213) on the two adjacent connection plates 2 (2) located on the same side, and a linear prestressed tendon is passed through the inside.

8. A precast concrete tower barrel for wind power generation according to claim 7, characterized in that: The second fixing hole (214) on the connecting piece 1 (1) is correspondingly connected to the second connecting holes (114) on the two adjacent connecting pieces 2 (2) located on the same side, and a linear prestressed tendon is passed through the inside.

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