A concrete wind power tower connection device

Abstract

The present invention provides a new type of concrete wind power tower connection device, which at least includes a first precast plate and a second precast plate arranged adjacent to each other; the first precast plate is provided with a first connection plate and a second connection plate on the side facing the second precast plate; the second precast plate is also provided with a first connection plate and a second connection plate on the side facing the first precast plate, and the two first connection plates relative to each other and the two second connection plates relative to each other are respectively connected by bolts; the precast plates are also provided with anti-splitting steel bars, anti-pulling steel bars and distribution steel bars. The width direction of the first connection plate is perpendicular to the plate surface of the first precast plate, and the width direction of the second connection plate is parallel to the plate surface of the first precast plate, so as to strengthen the circumferential and axial bending and shear resistance of the tower; at the same time, the bolt connection hole of the first connection plate can be used as a hanging point; the anti-splitting steel bars improve the shear bearing capacity of the tower, the anti-pulling steel bars improve the anti-pulling capacity of each connection plate, and the distribution steel bars increase the integrity of the precast plate and the connection plate, the anti-splitting steel bars and the anti-pulling steel bars.

Description

Technical Field

[0001] The invention relates to the technical field of towers, and in particular to a concrete wind power tower connection device. Background Art

[0002] With the rapid development of modern industry, human demand for energy has increased dramatically. At the same time, climate change and environmental protection issues have also increasingly attracted people's attention and concerns. As a renewable resource, wind energy has the advantages of being green, clean and inexpensive. The joints of traditional concrete towers require on-site grouting and maintenance, resulting in more construction processes and a longer installation period.

[0003] Prefabricated buildings have many advantages, such as saving resources, reducing labor, being green and environmentally friendly, improving production efficiency, shortening construction period, standardized production, and improving the comprehensive economic benefits of buildings. The tower is assembled in blocks and sections. The components are prefabricated in the factory and transported to the construction site for hoisting by lifting equipment. Therefore, the lifting point connectors installed on the prefabricated components are particularly important for demoulding and hoisting construction. In order to promote the development of prefabricated assembled concrete structures, it is of great engineering value to study and propose a connection device with good mechanical properties, which can be used as a lifting point and for component connection, and realize the installation first and then the pouring of component joints, which is convenient for construction. The existing connection device does not combine the lifting point of the prefabricated component with the connection node. Summary of the invention

[0004] In view of the defects in the prior art, the present invention provides a concrete wind power tower connection device, which solves the technical problem that the prior connection device fails to combine the prefabricated component hanging point with the connection node.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0006] A concrete wind power tower connection device is arranged on a tower, the tower is spliced ​​by a plurality of prefabricated components, the connection device comprises at least a first prefabricated plate and a second prefabricated plate arranged adjacent to each other; the first prefabricated plate is provided with a first connecting plate and a second connecting plate on the side facing the second prefabricated plate; the first connecting plate passes through the first prefabricated plate and then extends toward the second prefabricated plate, and the width direction of the first connecting plate is perpendicular to the plate surface of the first prefabricated plate; the second connecting plate passes through the first prefabricated plate and then extends toward the second prefabricated plate, and the width direction of the second connecting plate is parallel to the plate surface of the first prefabricated plate; the second prefabricated plate is also provided with the first connecting plate and the second connecting plate on the side facing the first prefabricated plate, and the two oppositely arranged first connecting plates and the two oppositely arranged second connecting plates are respectively connected by bolts;

[0007] The prefabricated plate is also provided with anti-splitting steel bars, anti-pulling steel bars and distribution steel bars; the first connecting plate is embedded in the prefabricated plate and is provided with at least a first through hole and a second through hole, the first through hole and the second through hole are arranged at intervals along the length direction of the first connecting plate, the anti-splitting steel bars are respectively penetrated in the first through hole and the second through hole, and the anti-splitting steel bars are extended along the center line direction of the first through hole; the anti-pulling steel bars are arranged in the first through hole, and the anti-pulling steel bars are U-shaped, the middle part of the anti-pulling steel bars pass through the first through hole and the two ends extend toward the inside of the prefabricated plate; the second connecting plate is embedded in the prefabricated plate and is provided with at least a third through hole, the anti-pulling steel bars are also arranged in the third through hole, the middle part of the anti-pulling steel bars pass through the third through hole and the two ends extend toward the inside of the prefabricated plate; the distribution steel bars are also U-shaped, the middle part of the distribution steel bars bypasses two anti-splitting steel bars and the two ends extend toward the inside of the prefabricated plate, there are multiple distribution steel bars, and the multiple distribution steel bars are arranged at intervals along the extension direction of the anti-splitting steel bars; the tail ends of the anti-splitting steel bars, the anti-pulling steel bars and the distribution steel bars are all provided with hooks.

[0008] Optionally, at least two first connecting plates are provided on a side of the first prefabricated plate facing the second prefabricated plate, and at least one second connecting plate is provided between two adjacent first connecting plates.

[0009] Optionally, the first prefabricated plate and the second prefabricated plate are arranged circumferentially or axially around the tower.

[0010] Optionally, an end plate is provided at one end of the first connecting plate and the second connecting plate embedded in the prefabricated plate.

[0011] Optionally, the first connecting plate, the second connecting plate and the end plate are all made of high-strength steel.

[0012] Optionally, a limiting groove is provided on the side of the end plate away from the connecting plate, the extension direction of the limiting groove is consistent with the width direction of the first connecting plate, a compression rod is provided in the limiting groove, and both ends of the compression rod are flush with the two opposite side surfaces of the prefabricated plate.

[0013] Optionally, the limiting groove is a trapezoidal opening groove, the groove width of the trapezoidal opening groove is smaller than the groove bottom width, and the outer contour of the anti-compression rod is adapted to the trapezoidal opening groove.

[0014] Optionally, brackets are provided at both ends of the compression rod, and the bottom surface of the bracket is flush with the surface of the prefabricated board.

[0015] Optionally, the compression rod includes a first rod body and a second rod body, the first rod body is slidably connected to the second rod body, a spring is provided between the first rod body and the second rod body, one end of the spring is fixedly connected to the first rod body, and the other end of the spring is fixedly connected to the second rod body.

[0016] Optionally, a guide rod is provided on a side of the first rod body facing the second rod body, a guide hole is provided on a side of the second rod body facing the first rod body, the guide rod extends into the guide hole, and the spring sleeve is arranged on the outer periphery of the guide rod.

[0017] It can be seen from the above technical solution that the beneficial effects of the present invention are:

[0018] The present invention provides a concrete wind power tower connection device, which is arranged on the tower. The tower is spliced ​​by a plurality of prefabricated components, and at least includes a first prefabricated plate and a second prefabricated plate arranged adjacently; the first prefabricated plate is provided with a first connecting plate and a second connecting plate on the side facing the second prefabricated plate; the second prefabricated plate is also provided with the first connecting plate and the second connecting plate on the side facing the first prefabricated plate, and the two oppositely arranged first connecting plates and the two oppositely arranged second connecting plates are respectively connected by bolts; the prefabricated plate is also provided with anti-splitting steel bars, anti-pulling steel bars and distribution steel bars. The width direction of the first connecting plate is perpendicular to the plate surface of the first prefabricated plate, and the width direction of the second connecting plate is parallel to the plate surface of the first prefabricated plate, so as to strengthen the circumferential and axial bending and shearing resistance of the tower; at the same time, the bolt connection hole of the first connecting plate can be used as a hanging point; the anti-splitting steel bar improves the shear bearing capacity of the tower, the anti-pulling steel bar improves the anti-pulling capacity of each connecting plate, and the distribution steel bar increases the integrity of the prefabricated plate and the connecting plate, the anti-splitting steel bar and the anti-pulling steel bar. The connection device has excellent stress-bearing performance and can achieve the purpose of assembling first and then pouring and connecting the precast concrete components of the large tower, thereby improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0020] Figure 1 It is a schematic diagram of the structure of the tower;

[0021] Figure 2 This is a schematic diagram of prefabricated panel splicing;

[0022] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0023] Figure 4 It is a structural schematic diagram of the tower connection device;

[0024] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0025] Figure 6It is a structural schematic diagram of another embodiment of the tower connection device;

[0026] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0027] Figure 8 is a structural schematic diagram of the end plate;

[0028] Fig. 9 It is the structural schematic diagram of the compression rod;

[0029] Reference numerals:

[0030] 1-prefabricated component, 2-first connecting plate, 3-second connecting plate, 4-end plate, 5-bolt, 6-anti-splitting steel bar, 7-anti-pulling steel bar, 8-distribution steel bar, 9-compression rod;

[0031] 11-first prefabricated plate, 12-second prefabricated plate, 13-third prefabricated plate, 21-first through hole, 22-second through hole, 31-third through hole, 41-limiting groove, 91-first rod body, 92-second rod body, 93-guide rod, 94-guide hole, 95-spring, 96-bracket. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0033] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the invention belongs.

[0034] See also Figure 1-5, the present application provides a concrete wind power tower connection device, which is arranged on the tower, and the tower is spliced ​​by a plurality of prefabricated components 1. The connection device comprises at least a first prefabricated plate 11 and a second prefabricated plate 12 arranged adjacent to each other. The first prefabricated plate 11 is provided with a first connecting plate 2 and a second connecting plate 3 on the side facing the second prefabricated plate 12; the first connecting plate 2 passes through the first prefabricated plate 11 and extends toward the second prefabricated plate 12, and the width direction of the first connecting plate 2 is perpendicular to the board surface of the first prefabricated plate 11; the second connecting plate 3 passes through the first prefabricated plate 11 and extends toward the second prefabricated plate 12, and the width direction of the second connecting plate 3 is parallel to the board surface of the first prefabricated plate 11, that is, the first connecting plate 2 and the second connecting plate 3 are perpendicular to each other. The first connecting plate 2 and the second connecting plate 3 are also provided on the side of the second prefabricated plate 12 facing the first prefabricated plate 11, and the two oppositely arranged first connecting plates 2 and the two oppositely arranged second connecting plates 3 are respectively connected by bolts, so that the first prefabricated plate 11 and the second prefabricated plate 12 are firmly spliced. Preferably, the first connecting plate 2 and the second connecting plate 3 are both made of high-strength steel with high yield strength. Since the width direction of the first connecting plate 2 is perpendicular to the plate surface of the first prefabricated plate 11, the bending moment bearing capacity is relatively strong when the prefabricated plate is demoulded and hoisted. Therefore, the first connecting plate 2 can be used as a lifting point, which can meet the requirements of demoulding and hoisting of large prefabricated components 1. The first prefabricated plate 11 and the second prefabricated plate 12 are both concrete slabs.

[0035] The prefabricated plate is also provided with anti-splitting steel bars 6, anti-pulling steel bars 7 and distribution steel bars 8. The first connecting plate 2 is embedded in the prefabricated plate and is provided with at least a first through hole 21 and a second through hole 22 on its surface. The first through hole 21 and the second through hole 22 are arranged at intervals along the length direction of the first connecting plate 2. The anti-splitting steel bars 6 are respectively passed through the first through hole 21 and the second through hole 22. The anti-splitting steel bars 6 are extended along the center line direction of the first through hole 21. The anti-pulling steel bars 7 are arranged in the first through hole 21. The anti-pulling steel bars 7 are U-shaped. The middle part of the anti-pulling steel bars 7 passes through the first through hole 21 and both ends extend toward the inside of the prefabricated plate. The second connecting plate 3 is embedded in the prefabricated plate. At least a third through hole 31 is provided on the inner plate surface, and the anti-pulling steel bar 7 is also provided in the third through hole 31. The middle part of the anti-pulling steel bar 7 passes through the third through hole 31 and both ends extend toward the inside of the precast plate; the distribution steel bar 8 is also U-shaped, and the middle part of the distribution steel bar 8 bypasses the two anti-splitting steel bars 6 and both ends extend toward the inside of the precast plate. There are multiple distribution steel bars 8, and the multiple distribution steel bars 8 are arranged at intervals along the extension direction of the anti-splitting steel bars 6; the tail ends of the anti-splitting steel bars 6, the anti-pulling steel bars 7 and the distribution steel bars 8 are all provided with hooks, which can enhance the bonding performance between the steel bars and the precast concrete plate. The anti-splitting steel bar 6 provides lateral constraints for the first connecting plate 2, resists the shear force perpendicular to the first connecting plate 2 during the overturning process, and resists the shear force on the tower cross section under the action of wind load after the tower is installed, preventing the first connecting plate 2 from causing the concrete component to split and fail under the action of shear force. At the same time, the anti-splitting steel bar 6 can also provide pull-out bearing capacity; the pull-out steel bar 7 passes through the reserved hole to resist the tensile force along the length direction of the connecting piece, and has a strong pull-out effect; the distributed steel bar 8 can increase the bonding between the anti-splitting steel bar 6 and the concrete, increase the integrity of the connecting device, and prevent local shear damage to the concrete.

[0036] As a further improvement to the above solution, at least two first connecting plates 2 are provided on the side of the first prefabricated plate 11 facing the second prefabricated plate 12, and at least one second connecting plate 3 is provided between two adjacent first connecting plates 2. Preferably, the first connecting plates 2 and the second connecting plates 3 are alternately arranged at intervals to evenly share the lateral wind load and the upper gravity load.

[0037] As a further improvement to the above solution, the first precast panel 11 and the second precast panel 12 are arranged around the tower in the circumferential direction or in the axial direction. The tower is assembled in blocks and sections, and the two precast concrete panels are connected by bolts to connect the connectors. After the overall installation is completed, the joints are poured, which can speed up the installation process and there is no need to wait for the traditional grouting curing process during construction.

[0038] As a further improvement to the above solution, the first connecting plate 2 and the second connecting plate 3 are both provided with an end plate 4 at one end of the embedded prefabricated plate, and the end plate 4 is also made of high-strength steel, and the end plate 4 is welded to the connecting plate. The end plate 4 is provided to strengthen the bonding performance between the connecting plate and the concrete.

[0039] As a further improvement to the above scheme, please refer to Figure 6-8 The end plate 4 is provided with a limiting groove 41 on one side away from the connecting plate. The extending direction of the limiting groove 41 is consistent with the width direction of the first connecting plate 2. A compression rod 9 is provided in the limiting groove 41. The two ends of the compression rod 9 are respectively flush with the two opposite side surfaces of the precast plate. The compression rod 9 is also made of high-strength steel, and the end plate 4 is welded to the compression rod 9 to locate the position of each connecting plate. During casting, the two ends of the compression rod 9 abut against the inner wall of the mold to prevent the connecting plate from deviating during casting and causing the precast plate to be scrapped.

[0040] As a further improvement to the above scheme, please refer to Figure 8 The limiting groove 41 is a trapezoidal opening groove, the groove width of the trapezoidal opening groove is smaller than the groove bottom width, and the outer contour of the anti-compression rod 9 is adapted to the trapezoidal opening groove, that is, the anti-compression rod 9 is also set in a trapezoidal shape. Through the cooperation between the trapezoidal opening groove and the trapezoidal anti-compression rod 9, the end plate 4 can only slide along the extension direction of the anti-compression rod 9, thereby preventing the connection plate from rotational dislocation and length direction dislocation.

[0041] As a further improvement to the above scheme, please refer to Fig. 9 Both ends of the compression rod 9 are provided with brackets 96, and the brackets 96 are threadedly connected to the compression rod 9. The bottom surface of the brackets 96 is flush with the surface of the prefabricated board. During pouring, the brackets 96 are placed at the bottom of the mold to locate the specific position of the connecting device described in this application in the thickness direction of the prefabricated board.

[0042] As a further improvement to the above scheme, please refer to Fig. 9The compression rod 9 includes a first rod body 91 and a second rod body 92, wherein the first rod body 91 is slidably connected to the second rod body 92, and a spring 95 is arranged between the first rod body 91 and the second rod body 92, wherein one end of the spring 95 is fixedly connected to the first rod body 91, and the other end of the spring 95 is fixedly connected to the second rod body 92. Preferably, a guide rod 93 is arranged on the side of the first rod body 91 facing the second rod body 92, and a guide hole 94 is arranged on the side of the second rod body 92 facing the first rod body 91, wherein the guide rod 93 extends into the guide hole 94, and the spring 95 is sleeved on the outer periphery of the guide rod 93. It should be noted that any connecting plate arranged on the compression rod 9 can only be welded to one of the rod bodies, and cannot be welded to both rod bodies at the same time so that the spring 95 loses its adjustment ability, and when the compression rod 9 is placed in the mold, the spring 95 is in a compressed state, and preferably, the compression rod 9 is placed in the casting mold and then the connecting plate is welded according to the designed spacing, and the compression of the left and right sides and the upper and lower sides of the precast plate is reduced by the reaction force of the spring 95.

[0043] Therefore, the present invention has the following beneficial effects:

[0044] 1. The connector is made of high-strength steel, and the connector has excellent bonding performance with concrete by setting the tail end plate;

[0045] 2. The bolt connection hole of the first connecting member in the connecting device can also be used as a hoisting hole. It has excellent force-bearing performance in the width direction and can withstand a large lifting weight during demoulding and hoisting. After the hoisting is completed, it can be used as a connecting member to connect two adjacent prefabricated panels;

[0046] 3. Pull-out steel bars can significantly improve the axial pull-out bearing capacity of the connector; splitting steel bars can provide lateral constraints for the first connector, provide shear bearing capacity and pull-out bearing capacity, so that the first connector can be used in different lifting methods such as horizontal lifting and flip lifting, so that the connector has strong shear resistance in the wind turbine tower segment; distributed steel bars can increase the integrity between the entire connection device and the prefabricated components, and prevent local damage to the prefabricated components;

[0047] 4. Compared with the traditional concrete tower connection method, the connection between precast concrete components can be connected by bolts first, and after the whole or part of the segment installation is completed, the gap between the component joints is uniformly poured and filled. It is not necessary to grout and maintain each segment before the next installation, which saves construction time;

[0048] 5. The connection device can set the appropriate spacing and number of connectors according to the height, width and quality of the tower, and can simultaneously realize the connection of annular components and the segmented connection of the upper and lower towers.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A concrete wind power tower connection device, arranged on a tower, wherein the tower is formed by splicing a plurality of prefabricated components (1), characterized in that: The connection device comprises at least a first prefabricated plate (11) and a second prefabricated plate (12) which are arranged adjacent to each other; a first connection plate (2) and a second connection plate (3) are arranged on the side of the first prefabricated plate (11) facing the second prefabricated plate (12); the first connection plate (2) passes through the interior of the first prefabricated plate (11) and then extends toward the side of the second prefabricated plate (12), and the width direction of the first connection plate (2) is perpendicular to the plate surface of the first prefabricated plate (11); the second connection plate (3) passes through the interior of the first prefabricated plate (11) and then extends toward the side of the second prefabricated plate (12), and the width direction of the second connection plate (3) is parallel to the plate surface of the first prefabricated plate (11); the second prefabricated plate (12) is also correspondingly arranged on the side of the second prefabricated plate (12) facing the first prefabricated plate (11), and the two oppositely arranged first connection plates (2) and the two oppositely arranged second connection plates (3) are respectively connected by bolts; the first prefabricated plate (11) and the second prefabricated plate (12) are both concrete plates; The prefabricated plate is further provided with anti-splitting steel bars (6), anti-pulling steel bars (7) and distribution steel bars (8); the first connecting plate (2) is embedded in the prefabricated plate and is provided with at least a first through hole (21) and a second through hole (22); the first through hole (21) and the second through hole (22) are arranged at intervals along the length direction of the first connecting plate (2); the anti-splitting steel bars (6) are respectively passed through the first through hole (21) and the second through hole (22); the anti-pulling steel bars (7) are provided in the first through hole (21); the anti-pulling steel bars (7) are U-shaped, the middle of the anti-pulling steel bars (7) pass through the first through hole (21) and both ends extend toward the inside of the prefabricated plate The second connecting plate (3) is embedded in the precast plate and is provided with at least a third through hole (31). The third through hole (31) is also provided with the anti-pulling steel bar (7). The middle of the anti-pulling steel bar (7) passes through the third through hole (31) and both ends extend toward the inside of the precast plate. The distribution steel bar (8) is also U-shaped. The middle of the distribution steel bar (8) bypasses the two anti-splitting steel bars (6) and both ends extend toward the inside of the precast plate. There are a plurality of distribution steel bars (8), and the plurality of distribution steel bars (8) are arranged at intervals along the extension direction of the anti-splitting steel bars (6). The tail ends of the anti-splitting steel bars (6), the anti-pulling steel bars (7) and the distribution steel bars (8) are all provided with hooks. The first connecting plate (2) and the second connecting plate (3) are both provided with an end plate (4) at one end of the embedded prefabricated plate; a limiting groove (41) is provided on a side of the end plate (4) away from the connecting plate, the extending direction of the limiting groove (41) is consistent with the width direction of the first connecting plate (2), a compression rod (9) is provided in the limiting groove (41), and two ends of the compression rod (9) are respectively flush with two opposite side surfaces of the prefabricated plate; the compression rod (9) comprises a first rod body (91) and a second rod body (92), the first rod body (91) and the second rod body (92) are slidably connected, a spring (95) is provided between the first rod body (91) and the second rod body (92), one end of the spring (95) is fixedly connected to the first rod body (91), and the other end of the spring (95) is fixedly connected to the second rod body (92).

2. A concrete wind power tower connection device according to claim 1, characterized in that: At least two first connecting plates (2) are provided on the side of the first prefabricated plate (11) facing the second prefabricated plate (12), and at least one second connecting plate (3) is provided between two adjacent first connecting plates (2).

3. A concrete wind power tower connection device according to claim 1, characterized in that: The first prefabricated plate (11) and the second prefabricated plate (12) are arranged circumferentially or axially around the tower.

4. A concrete wind power tower connection device according to claim 1, characterized in that: The first connecting plate (2), the second connecting plate (3) and the end plate (4) are all made of high-strength steel.

5. A concrete wind power tower connection device according to claim 1, characterized in that: The limiting groove (41) is a trapezoidal opening groove, the groove width of the trapezoidal opening groove is smaller than the groove bottom width, and the outer contour of the anti-pressure rod (9) is adapted to the trapezoidal opening groove.

6. A concrete wind power tower connection device according to claim 1, characterized in that: Brackets (96) are provided at both ends of the compression rod (9), and the bottom surface of the bracket (96) is flush with the surface of the prefabricated board.

7. A concrete wind power tower connection device according to claim 1, characterized in that: A guide rod (93) is provided on the side of the first rod body (91) facing the second rod body (92), a guide hole (94) is provided on the side of the second rod body (92) facing the first rod body (91), the guide rod (93) extends into the guide hole (94), and the spring (95) is sleeved on the outer circumference of the guide rod (93).

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