CN112482861A

CN112482861A - Replaceable energy-consumption connecting device for self-reset node

Info

Publication number: CN112482861A
Application number: CN202011467037.7A
Authority: CN
Inventors: 王光钊; 仇逍逸; 王宇航; 刘慧�; 黄小刚
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-03-12

Abstract

The invention discloses a replaceable self-reset node energy consumption connecting device, and relates to the technical field of wind power generation. The device consists of a pulling plate and a pressing plate, wherein the pulling plate and the pressing plate are fixedly embedded together through a corrugated surface, and the contact surface is subjected to sand blasting treatment. The pulling plate comprises a T-shaped pulling plate and a U-shaped pulling plate, wherein the section I of the T-shaped plate and the section II of the U-shaped plate are perforated along the thickness direction, and are connected in series by using a screw rod and exert pretension force. The pressing plate is divided into an upper pressing plate and a lower pressing plate, the pressing plates are connected through a prestressed pull rod, and the pressing plates are reserved with corrugated groove positions so as to be embedded with the corrugated surface of the pull plate. The outer surface of the pressure plate is welded with C-shaped steel along the length direction to strengthen the external rigidity. The device dissipates the input energy through the friction force of the contact surface and the corrugated surface, and realizes the self-resetting of the component through the restoring force of the prestressed pull rod. The device is simple to replace, clear in force transmission, simple and convenient to install, good in energy consumption effect, suitable for the energy consumption of the connection node of the wind power lattice type tower and wide in engineering application prospect in other lattice type fields.

Description

Replaceable energy-consumption connecting device for self-reset node

Technical Field

The invention relates to the technical field of wind power generation.

Background

Wind power generation is one of the most mature power generation modes with the most scale development conditions and the most commercial development prospects in the renewable energy field, and meanwhile, wind resources are widely distributed and abundant in reserves in the global range. According to GWEC statistics, the global wind power accumulated installed capacity is 651GW up to the end of 2019, and the annual average composite growth rate is about 20.12% when the annual average installed capacity is increased by more than 26 times compared with the increase at the end of 2001. The requirements of the high-speed development of wind power generation engineering on wind power towers are higher and higher, the traditional towers are mostly pure steel tower drums and concrete tower drums, but the pure steel tower drums cannot meet the requirements of the tower drums with the length of 140 meters or more due to low rigidity, and meanwhile, the height of the current tower drum only reaches 160 meters due to the self weight and the body type of the tower drum. In order to solve the problems, the lattice-steel tower combined tower barrel is heated more and more, but the connection node of the lattice-type stay bar and the column is easy to generate fatigue failure under the action of long-term wind load, the energy consumption capability of the node is poor, and the replacement of the node after the node is damaged is also a big problem.

In order to solve the problems of the nodes and further promote the development of wind energy resources, the invention provides a replaceable self-reset node energy consumption connecting device. The device converts the tensile force and the pressure of the connecting piece into the tensile force of the prestressed rod by utilizing the corrugated surface, dissipates the input energy through the friction force of the contact surface and the corrugated surface, and realizes the self-resetting of the component through the restoring force formed by the prestressed rod. The device is simple to replace, simple and convenient to install, good in energy consumption effect, suitable for the energy consumption of the connecting node of the wind power lattice type tower and wide in engineering application prospect in other lattice type fields.

Disclosure of Invention

The invention discloses a replaceable self-reset node energy consumption connecting device which comprises: the device consists of a pulling plate and a pressing plate, wherein the contact surface of the pulling plate and the pressing plate is a cylindrical corrugated surface which can be mutually embedded, and sand blasting is carried out on the corrugated surface. The pulling plate is divided into a T-shaped pulling plate and a U-shaped pulling plate, in addition, holes are punched in the thickness direction of a T-shaped plate I section and a U-shaped plate II section, the I section is a runway hole, the II section is a normal round hole, and finally, the pulling plate is connected in series through a pulling plate bolt and exerts pretension force. The pressing plate is divided into an upper pressing plate and a lower pressing plate, the pressing plates are connected through a prestressed pull rod, a wave-shaped groove position is reserved in each pressing plate so as to be embedded with a corrugated surface of the pull plate, and meanwhile, the upper portion and the lower portion of each pressing plate are kept to be flat sections so as to limit vertical dislocation between the pressing plates and the pull plates. C-shaped steel is welded on the outer surface of the pressing plate along the length direction, so that the outer rigidity of the surface is enhanced, and the outer buckling deformation of the pressing plate is prevented.

The device dissipates the input energy through the contact surface between the T-shaped plate section and the U-shaped plate and the friction force of the corrugated surface between the pressing plate and the pulling plate, and realizes the self-resetting of the component through the restoring force of the prestressed rod on the pressing plate. The device is simple to replace, clear in force transmission, capable of realizing batch production in factories, simple and convenient to install, good in energy consumption effect and wide in engineering application prospect in the field of lattice type tower connection.

The technical scheme of the invention is as follows:

the utility model provides a removable from restoring to throne node power consumption connecting device, the device contains top board, holding down plate, T shape arm-tie, U-shaped arm-tie, arm-tie high strength bolt, prestressing force pull rod, connecting bolt, sandblast coating, runway hole, normal round hole. The T-shaped pulling plate and the U-shaped pulling plate of the device are mutually embedded and connected by utilizing a pulling plate high-strength bolt; the upper pressing plate and the lower pressing plate are connected through the prestress pull rod, and the surface of the pressing plate is subjected to sand blasting coating treatment to increase the friction of a contact surface.

The inner surfaces of the upper pressure plate and the lower pressure plate are cylindrical continuous corrugated surfaces, and the corrugated surfaces are subjected to sand blasting coating treatment. Meanwhile, the prestressed pull rods are connected in the length direction and do not pass through the T-shaped pull plate and the U-shaped pull plate, so that the situation that the displacement between the pull plates is limited and the energy consumption of the device is influenced is prevented. The I section of the T-shaped pulling plate and the II section of the U-shaped pulling plate are embedded in the plane in a solid combination mode, and the corrugated phases are guaranteed to be consistent. In addition, in the thickness direction, the I section adopts a runway hole with a larger aperture, the II section adopts a normal round hole, and the pull plate high-strength bolt penetrates through the runway hole and the normal round hole and is connected with the pull plate by utilizing the friction force of the contact surface. The cross section of the runway hole is in a closed runway shape consisting of two parallel edges and a semicircle.

The energy dissipation device is installed on a stay bar and an upright post of a lattice type tower structure of the wind power tower, and high-strength bolts are adopted at two ends of the device to connect a stay bar plate and an upright post connecting plate. Under normal work, the friction surface in the device absorbs the dissipation energy, and the device automatically resets by utilizing the prestressed pull rod.

Compared with the prior art, the invention has the following beneficial effects:

(1) the energy dissipation device is used for connection of lattice type tower frame nodes, can dissipate energy input by the rod pieces, can effectively solve the fatigue problem of the nodes in the normal use process of the structure, and prolongs the service life of the structure.

(2) The energy dissipation device is connected with the component to be connected through the bolt, replacement and maintenance are convenient, and the problem that the structure cannot be used due to node damage in engineering can be solved.

(3) The energy consumption device can realize self-resetting of the U-shaped pulling plate and the T-shaped pulling plate by utilizing the prestressed rods, and the service life of the device is long.

(4) The energy dissipation device is simple in structure, convenient to manufacture and install and high in operability in practical engineering.

Drawings

FIG. 1 is a schematic overall view of a self-resetting nodal energy consuming connection of the present invention;

FIG. 2 is a general schematic view of a T-shaped pulling plate according to the present invention;

FIG. 3 is a general schematic view of a U-shaped pulling plate of the present invention;

FIG. 4 is a schematic view of the connection of the T-shaped pulling plate and the U-shaped pulling plate of the present invention;

FIG. 5 is an overall schematic view of the upper platen of the present invention;

FIG. 6 is a schematic view showing the connection between concrete filled steel tube and stay bar according to the present invention

In the figure: the steel tube concrete composite tie plate comprises, by weight, 1-T-shaped tie plate, 2-U-shaped tie plate, 3-upper press plate, 4-lower press plate, 5-connecting bolt, 6-prestress tie rod, 7-C-shaped channel steel, 8-T-shaped tie plate I section, 9-runway hole, 10-sand blasting coating, 11-U-shaped tie plate II section, 12-round hole, 13-tie plate high-strength bolt, 14-press plate inner side corrugated surface, 15-steel tube concrete column and 16-brace rod.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in figure 1, the self-reset node energy consumption connecting device is composed of a pulling plate and a pressing plate. The pulling plate is divided into a T-shaped pulling plate (1) and a U-shaped pulling plate (2); the pressing plate is divided into an upper pressing plate (3) and a lower pressing plate (4) which are connected through a prestress pull rod (6), and meanwhile, C-shaped channel steel (7) is welded outside the pressing plate surface, so that the external rigidity of the surface is increased. Prevent the outer surface of the pressure plate from generating excessive deformation. The pulling plate is connected with the piece to be connected through a connecting bolt (5).

As shown in figure 2, the surface of the section I (8) of the T-shaped pulling plate (1) is a cylindrical corrugated surface, and the surface is a sand blasting coating (10), so that the friction force between the T-shaped pulling plate and the pressing plate is increased. The I section is provided with a runway hole (9) along the thickness direction and penetrates through the height direction. The runway hole (9) is composed of a semicircle and a straight edge, is larger than a normal hole, and is convenient for mutual sliding between the pulling plates.

As shown in figure 3, the side surface of the II section (11) of the U-shaped pulling plate (2) and the I section of the T-shaped pulling plate adopt identical cylindrical corrugated surfaces so as to be assembled with each other. The thickness direction of the II section (11) is a common round hole (12).

As shown in the left part of figure 4, the T-shaped pulling plate (1) and the U-shaped pulling plate (2) are mutually embedded, and the hole positions are aligned. And are connected in series through pull plate high-strength bolts (13), and friction force is formed between the pull plates. The surfaces of the pulling plates are all treated by sandblast coatings (10), the pulling plates are matched with the complementary slot positions of the pressing plates (4) after being embedded, and meanwhile, the four sides of the pressing plates (4) are changed into flat sections to prevent the pulling plates from sliding out of the slot positions; as shown in fig. 4, the energy consumption connecting device converts the force along the plate surface direction into the force in the vertical plate direction, and resists the force vertical to the plate surface through the upper pressing plate (3), the lower pressing plate (4), the prestressed pull rod (6) and the C-shaped channel steel (7), and meanwhile, the restoring force of the prestressed pull rod (6) resets the device.

As shown in fig. 5, the inner cylindrical corrugated surface (14) of the pressure plate (4) is complementarily fitted with the pulling plate surface. Meanwhile, the upper pressing plate (3) is connected with the lower pressing plate (4) through a prestress pull rod (6). C-shaped channel steel (7) is welded outside the pressing plate surface along the length direction, and the external rigidity is increased.

As shown in FIG. 6, the connection between the concrete filled steel tubular column (15) and the stay bar (16) is common in the novel lattice type wind power tower, and the input energy can be dissipated by connecting the energy dissipation device through the bolt (5), so that the fatigue failure at the welding seam of the connecting plate is avoided.

The invention provides a replaceable self-reset node energy consumption connecting device which comprises a pulling plate, a pressing plate, a prestressed pull rod and a bolt. The device dissipates the input energy through the friction force of the contact surface and the corrugated surface, and realizes the self-resetting of the component through the restoring force of the prestressed pull rod. The device has the advantages of simple replacement, simple and convenient installation, good energy consumption effect, long fatigue life and wide engineering application prospect.

The foregoing is merely a preferred embodiment of the present invention, but the present invention is not limited to the specific embodiments described above. Those skilled in the art should appreciate that they may readily use the disclosed conception and specific embodiments as a basis for modifying, supplementing or modifying other structures for providing out the same purposes of the present invention.

Although used more herein: 1-etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention and they are to be interpreted as any additional limitation which is not in accordance with the spirit of the present invention.

Claims

1. The utility model provides a removable from reset node power consumption connecting device, relates to wind power generation technical field, characterized by: the device comprises a T-shaped pull plate (1), a U-shaped pull plate (2), an upper pressing plate (3), a lower pressing plate (4), a connecting bolt (5), a prestress pull rod (6), a C-shaped channel steel (7), a T-shaped pull plate I section (8), a runway hole (9), a sand blasting coating (10), a U-shaped pull plate II section (11), a round hole (12), a pull plate high-strength bolt (13), a pressing plate inner side corrugated surface (14), a steel pipe concrete column (15) and a support rod (16); the device is characterized in that a T-shaped pulling plate (1) and a U-shaped pulling plate (2) are mutually embedded and connected by a pulling plate high-strength bolt (13); the upper pressing plate (3) is connected with the lower pressing plate (4) through a prestress pull rod (6), and the surface of the pressing plate is treated by a sand blasting coating (10) to increase the friction of a contact surface.

2. A replaceable self-resetting nodal energy consuming connection as claimed in claim 1, wherein: the upper pressing plate (3) and the lower pressing plate (4) are both rectangular plates integrally, the structures of the upper pressing plate and the lower pressing plate are completely consistent with those of the lower pressing plate, the inner surfaces of the pressing plates are continuous corrugated surfaces formed by cylindrical surfaces, and the corrugated surfaces are treated by sand blasting coatings (10). The upper pressing plate (3) and the lower pressing plate (4) are connected in the length direction by a prestress pull rod (6), and the prestress pull rod (6) does not pass through the T-shaped pull plate (1) and the U-shaped pull plate (2).

3. A replaceable self-resetting nodal energy consuming connection as claimed in claim 1, wherein: the upper and lower surfaces of the T-shaped pulling plate (1) and the U-shaped pulling plate (2) are continuous cylindrical corrugated surfaces which are complementary with the inner surfaces of the upper pressing plate (3) and the lower pressing plate (4), and the corrugated surfaces are subjected to sand blasting treatment. The I section (8) of the T-shaped pulling plate (1) and the II section (11) of the U-shaped pulling plate (2) are embedded in the plane for solid combination, and the corrugated phases are ensured to be consistent. In addition, in the thickness direction, the section I adopts a larger runway hole (9), the section II adopts a common round hole (12), and the pulling plate high-strength bolt (13) penetrates through the runway hole (9) and the normal round hole (12) and is connected with the pulling plate by utilizing the friction force of a contact surface.

4. A replaceable self-resetting nodal energy consuming connection as claimed in claim 1, wherein: the outer ends of the T-shaped pulling plate (1) and the U-shaped pulling plate (2) are connected with an external component to be connected through a connecting bolt (5).

5. A replaceable self-resetting nodal energy consuming connection as claimed in claim 1, wherein: c-shaped channel steel (7) is welded on the outer surfaces of the upper pressure plate (3) and the lower pressure plate (4) along the long edge direction, and the openings are inward.