A parallelogram chord structure and its manufacturing method

Abstract

This invention relates to a parallelogram chord structure, characterized by comprising an upper horizontal plate, a lower horizontal plate, vertical plates, node plates, joint plates, and anchor boxes; S1: fabrication of unit components; S2.1: welding of the web joint plates of the crossbeams; S2.2: welding of the inner vertical plate unit and the flange joint plates of the crossbeams; S2.3: welding of the outer vertical plate unit and the partition plates; S2.4: welding of the lower horizontal plate unit; S2.5: welding of the anchor plates; When assembling the parallelogram chord structure of this invention, each component needs to be processed before assembly. The box structure of the chord is assembled simultaneously with the joint plates, ensuring the assembly effect of the joint plates and avoiding the situation where assembly is impossible if the box is welded first and then the head plate is welded. This greatly improves assembly efficiency and ensures assembly accuracy.

Description

Technical Field

[0001] This invention relates to the field of bridge chord processing and manufacturing technology, and in particular to a parallelogram chord structure and its manufacturing method. Background Technology

[0002] Typical chord structure box girder structures are square, while parallelogram-shaped chord structures are generally used in inclined sections of bridges. When assembling and welding these parallelogram-shaped chord structures, their sides are typically equipped with crossbeam connecting plates, unlike the square-shaped chord structures. In square-shaped chord structures, these crossbeam connecting plates can be welded to the sides after the square chord assembly is complete. However, in parallelogram-shaped chord structures, it is not possible to first form the box girder structure and then weld the crossbeam connecting plates, as this would interfere with the horizontal plates of the box girder structure. Therefore, a new assembly and manufacturing process is needed to accommodate the assembly of parallelogram-shaped chord structures.

[0003] For example, Chinese Patent CN201610106421.1 discloses a method for manufacturing a zigzag double-node bolted and welded chord with anchor box. This zigzag double-node bolted and welded chord with anchor box is manufactured in the following order: unit component manufacturing, box body manufacturing, welding of crossbeam joint plates, drilling of bolt holes, and welding of anchor boxes. This zigzag double-node bolted and welded chord with anchor box is applied to the Shanghai-Nantong Bridge. The Shanghai-Nantong Bridge uses zigzag double-node chords at the locations where the stay cables are installed. This is to meet the requirement of setting the pre-camber. In the past, single-node bolted and welded chords were used, relying on the connection of misaligned holes and chord deformation to create an arch. The Shanghai-Nantong Bridge uses double-node chords, with bends set at the nodes to make it easier to achieve the arch requirement.

[0004] In the aforementioned patent, the chord structure has a square cross-section. In its manufacturing process, the crossbeam joint plate is welded after the box structure is completed. This welding method is not suitable for chord structures with a parallelogram cross-section. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a parallelogram chord structure and its manufacturing method, which can solve the problem that the general method of assembling and welding chord structures with square cross sections by first welding the box structure and then welding the crossbeam connecting plate is not applicable to chord structures with parallelogram cross sections.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a parallelogram chord structure, the innovation of which is: including an upper horizontal plate, a lower horizontal plate, a vertical plate, a node plate, a joint plate and an anchor box;

[0007] The upper and lower horizontal plates are arranged parallel to each other, and there is a pair of vertical plates, which are arranged parallel to each other; the top of the vertical plate is inclinedly connected to the lower surface of the upper horizontal plate, and the bottom of the vertical plate is inclinedly connected to the upper surface of the lower horizontal plate; the upper horizontal plate, the lower horizontal plate, and the vertical plates form a box structure with a parallelogram cross-section, and a number of partitions are arranged inside the box structure along the extension direction;

[0008] The node plates are in pairs and are respectively vertically disposed on the lower surface of the lower horizontal plate; the anchor boxes are in pairs and are respectively disposed on the upper surface of the upper horizontal plate; the positions of the anchor boxes on the upper horizontal plate correspond to the positions of the node plates on the lower horizontal plate.

[0009] The joint plate includes a crossbeam web joint plate and a crossbeam flange joint plate; there are several crossbeam web joint plates, which are connected to the vertical plate at equal intervals in a direction perpendicular to the upper horizontal plate; there are several crossbeam flange joint plates, which are set at the bottom end of the crossbeam web joint plates perpendicular to the crossbeam web joint plates; one end of the crossbeam flange joint plate is connected to the vertical plate.

[0010] A method for manufacturing a parallelogram chord structure, the innovation of which lies in the following specific manufacturing method:

[0011] S1: Unit component creation:

[0012] S1.1: Fabrication of vertical plate unit: CNC cut out two end plates, two node plates and one connecting plate, and level and scribing the cut plates, while milling out the slope and butt edge bevel; sequentially connect, weld and trim one end plate, one node plate, one connecting plate, another node plate and another end plate to form a vertical plate unit.

[0013] S1.2: Fabrication of the upper horizontal plate unit: After cutting the upper horizontal plate according to the dimensions, the individual part plates are leveled and marked, and the slope, butt joint edges and slits are milled; then, according to the process requirements, the part plates are joined, welded and trimmed to form the upper horizontal plate unit; a pair of parallel internal longitudinal ribs and external longitudinal ribs are welded on the inner wall of the upper horizontal plate.

[0014] S1.3: Fabrication of the lower horizontal plate unit: The lower horizontal plate is precisely cut according to the dimensions, leveled, and the two sides and bevels are milled out;

[0015] S1.4: Fabrication of anchor box unit: Precision cutting of load-bearing plate and inner connecting plate; welding of inner connecting plate to the inside of load-bearing plate to form load-bearing box; installation and welding of anchor plate at the end of load-bearing box;

[0016] S1.5: Fabrication of joint plate and anchor plate: According to the size requirements of the joint plate, precisely cut the joint plate and anchor plate, and mark the welding area of ​​the anchor box unit on the anchor plate;

[0017] S2: Structural Assembly: The overall structure is assembled using a tire-shaped inverted assembly method;

[0018] S2.1: Welding of the beam web joint plate: First, place the completed upper horizontal plate unit upside down on the jig, and mark the installation position of the beam web joint plate on the upper horizontal plate unit. Weld the beam web joint plate onto the upper horizontal plate unit in sequence according to the marked position, and the beam web joint plate is embedded in the outward longitudinal rib.

[0019] S2.2: Welding of inner vertical plate unit and crossbeam flange joint plate: After completing the welding of the crossbeam web joint plate on the upper horizontal plate unit, first attach the surface of the inner vertical plate unit tightly to the side of the crossbeam web joint plate, with the side tightly attached to the back of the upper horizontal plate unit at an angle for welding, and the side of the inner vertical plate unit is located between the inner longitudinal rib and the outer longitudinal rib of the box; then weld the crossbeam flange joint plate to the crossbeam web joint plate corresponding to the crossbeam web joint plate.

[0020] S2.3: Welding of outer vertical plate unit and partition: The processed partition is laid along the extension direction of the upper horizontal plate unit, and one side of the partition is tightly attached to the inner wall of the inner vertical plate unit. The other side of the partition is installed with the outer vertical plate unit and welded. The side of the outer vertical plate unit is welded to the back of the upper horizontal plate unit. The outer vertical plate unit, the upper horizontal plate unit and the inner vertical plate unit form a groove structure.

[0021] S2.4: Welding the lower horizontal plate unit: On the upper surface of the groove structure formed after completing the welding in S2.3, the finished lower horizontal plate unit is welded to form a box structure;

[0022] S2.5: Welding of anchor plates and anchor boxes: After completing the welding of the lower horizontal plate unit, turn the entire box structure over and mark the box structure system line, the intersection of the anchor plate system line and the upper horizontal plate; use this as the horizontal baseline to weld the anchor plates. When welding the anchor plates, control the direction and position of the anchor plates on the upper horizontal plate unit. After the anchor plates are welded, drill the bolt holes of the box structure. Mark the lines and drill the holes with the horizontal baseline as a reference. Finally, weld the anchor boxes on the anchor plates to complete the manufacturing.

[0023] Furthermore, in the fabrication of the S1.1 vertical plate unit, when CNC cutting and blanking the node plate, due to the large width of the node plate, the steel plate is first received and inspected before the whole plate is cut to ensure the shape of the node plate. The receiving position avoids the weld position of the rod.

[0024] Furthermore, in the fabrication of the upper horizontal plate unit of S1.2, both ends of the inner longitudinal rib and the outer longitudinal rib welded on the upper horizontal plate are provided with interlocking sections, and the interlocking sections of the outer longitudinal rib are welded after the chord is bridged, and several connecting bolt holes are opened on the interlocking sections.

[0025] The advantages of this invention are:

[0026] 1) When assembling the parallelogram chord structure in this invention, each component needs to be processed before assembly. The box structure of the chord is assembled simultaneously with the joint plate, which ensures the assembly effect of the joint plate and avoids the situation where it is impossible to assemble if the box is welded first and then the joint plate is welded. This can greatly improve the assembly efficiency and ensure the assembly accuracy. Attached Figure Description

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Figure 1 This is a schematic diagram of a parallelogram chord structure according to the present invention.

[0029] Figure 2 This is a flowchart illustrating the assembly process of a parallelogram chord structure according to the present invention.

[0030] Figures 3 to 6 This is an assembly diagram of a parallelogram chord structure according to the present invention. Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] like Figures 1 to 6 The parallelogram chord structure shown includes an upper horizontal plate 1, a lower horizontal plate 2, a vertical plate 3, a node plate 4, a joint plate 5, and an anchor box 6.

[0038] The upper horizontal plate 1 and the lower horizontal plate 2 are arranged parallel to each other, and there is a pair of vertical plates 3, which are arranged parallel to each other; the top of the vertical plate 3 is inclinedly connected to the lower surface of the upper horizontal plate, and the bottom of the vertical plate 3 is inclinedly connected to the upper surface of the lower horizontal plate; the upper horizontal plate 1, the lower horizontal plate 2 and the vertical plate 3 form a box structure with a parallelogram cross section, and several partitions are arranged inside the box structure along the extension direction.

[0039] There is a pair of node plates 4, which are respectively vertically arranged on the lower surface of the lower horizontal plate 2; there is a pair of anchor boxes 6, which are respectively arranged on the upper surface of the upper horizontal plate; the positions of the anchor boxes 6 on the upper horizontal plate correspond to the positions of the node plates on the lower horizontal plate 2.

[0040] The joint plate 5 includes a crossbeam web joint plate 51 and a crossbeam flange joint plate 52; there are several crossbeam web joint plates 51, which are connected to the vertical plate 2 at equal intervals in a direction perpendicular to the upper horizontal plate; there are several crossbeam flange joint plates 52, which are set at the bottom end of the crossbeam web joint plate 51 perpendicular to the crossbeam web joint plate 51; one end of the crossbeam flange joint plate 52 is connected to the vertical plate 3.

[0041] A method for manufacturing a parallelogram chord structure, the specific manufacturing method is as follows:

[0042] S1: Unit component creation:

[0043] S1.1: Fabrication of vertical plate unit: CNC cut out two end plates, two node plates and one connecting plate, and level and scribing the cut plates, while milling out the slope and butt edge bevel; sequentially connect, weld and trim one end plate, one node plate, one connecting plate, another node plate and another end plate to form a vertical plate unit.

[0044] S1.2: Fabrication of the upper horizontal plate unit: After cutting the upper horizontal plate according to the dimensions, the individual part plates are leveled and marked, and the slope, butt joint edges and slits are milled; then, according to the process requirements, the part plates are joined, welded and trimmed to form the upper horizontal plate unit; a pair of parallel internal longitudinal ribs and external longitudinal ribs are welded on the inner wall of the upper horizontal plate.

[0045] S1.3: Fabrication of the lower horizontal plate unit: The lower horizontal plate is precisely cut according to the dimensions, leveled, and the two sides and bevels are milled out;

[0046] S1.4: Fabrication of anchor box unit: Precision cutting of load-bearing plate and inner connecting plate; welding of inner connecting plate to the inside of load-bearing plate to form load-bearing box; installation and welding of anchor plate at the end of load-bearing box;

[0047] S1.5: Fabrication of joint plate and anchor plate: According to the size requirements of the joint plate, precisely cut the joint plate and anchor plate, and mark the welding area of ​​the anchor box unit on the anchor plate;

[0048] S2: Structural Assembly: The overall structure is assembled using a tire-shaped inverted assembly method;

[0049] S2.1: Welding of the beam web joint plate: First, place the completed upper horizontal plate unit upside down on the jig, and mark the installation position of the beam web joint plate on the upper horizontal plate unit. Weld the beam web joint plate onto the upper horizontal plate unit in sequence according to the marked position, and the beam web joint plate is embedded in the outward longitudinal rib.

[0050] S2.2: Welding of inner vertical plate unit and crossbeam flange joint plate: After completing the welding of the crossbeam web joint plate on the upper horizontal plate unit, first attach the surface of the inner vertical plate unit tightly to the side of the crossbeam web joint plate, with the side tightly attached to the back of the upper horizontal plate unit at an angle for welding, and the side of the inner vertical plate unit is located between the inner longitudinal rib and the outer longitudinal rib of the box; then weld the crossbeam flange joint plate to the crossbeam web joint plate corresponding to the crossbeam web joint plate.

[0051] S2.3: Welding of outer vertical plate unit and partition: The processed partition is laid along the extension direction of the upper horizontal plate unit, and one side of the partition is tightly attached to the inner wall of the inner vertical plate unit. The other side of the partition is installed with the outer vertical plate unit and welded. The side of the outer vertical plate unit is welded to the back of the upper horizontal plate unit. The outer vertical plate unit, the upper horizontal plate unit and the inner vertical plate unit form a groove structure.

[0052] S2.4: Welding the lower horizontal plate unit: On the upper surface of the groove structure formed after completing the welding in S2.3, the finished lower horizontal plate unit is welded to form a box structure;

[0053] S2.5: Welding of anchor plates and anchor boxes: After completing the welding of the lower horizontal plate unit, turn the entire box structure over and mark the box structure system line, the intersection of the anchor plate system line and the upper horizontal plate; use this as the horizontal baseline to weld the anchor plates. When welding the anchor plates, control the direction and position of the anchor plates on the upper horizontal plate unit. After the anchor plates are welded, drill the bolt holes of the box structure. Mark the lines and drill the holes with the horizontal baseline as a reference. Finally, weld the anchor boxes on the anchor plates to complete the manufacturing.

[0054] In the fabrication of the S1.1 vertical plate unit, when CNC cutting the node plate, due to the large width of the node plate, the steel plate is first received and inspected before the whole plate is cut to ensure the shape of the node plate. The receiving position avoids the weld position of the member.

[0055] In the fabrication of the upper horizontal plate unit S1.2, both ends of the inner longitudinal rib and the outer longitudinal rib of the box welded on the upper horizontal plate are provided with interlocking sections. The interlocking sections of the outer longitudinal rib are welded after the chord is bridged, and several connecting bolt holes are opened on the interlocking sections.

[0056] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method of manufacturing a parallelogram strut structure, characterized by: The parallelogram chordal structure comprises an upper horizontal plate, a lower horizontal plate, vertical plates, joint plates, joint plates and anchor boxes; The upper horizontal plate and the lower horizontal plate are arranged in parallel with each other, the vertical plates are arranged in parallel with each other, the top end of the vertical plate is inclinedly connected to the lower surface of the upper horizontal plate, and the bottom end of the vertical plate is inclinedly connected to the upper surface of the lower horizontal plate; the upper horizontal plate, the lower horizontal plate and the vertical plate form a box structure with a parallelogram cross section, and a plurality of partition plates are arranged in the box structure along the extension direction; The joint plates are arranged vertically on the lower surface of the lower horizontal plate; the anchor boxes are arranged on the upper surface of the upper horizontal plate; the positions of the anchor boxes on the upper horizontal plate correspond to the positions of the joint plates on the lower horizontal plate; The joint plates comprise beam web joint plates and beam flange joint plates; the beam web joint plates are arranged in parallel with the upper horizontal plate and are connected to the vertical plates at equal intervals; the beam flange joint plates are arranged vertically on the bottom end of the beam web joint plates; one end of the beam flange joint plate is connected to the vertical plate; The specific manufacturing method is as follows: S1: production of unit elements: S1.1: production of vertical plate unit: two end plates, two joint plates and a connecting plate are cut out by numerical control, and the cut plate is flattened and marked, and the slope, butt edge and groove are milled; the materials of one end plate, one joint plate, connecting plate, another joint plate and another end plate are sequentially connected, welded and trimmed to form a vertical plate unit; S1.2: production of upper horizontal plate unit: the upper horizontal plate is cut according to the size, and the parts are flattened and marked, and the slope, butt edge and groove are milled; then the parts are connected, welded and trimmed according to the process requirements to form an upper horizontal plate unit; a pair of parallel box inner and outer longitudinal ribs are welded on the inner wall of the upper horizontal plate; S1.3: production of lower horizontal plate unit: the lower horizontal plate is precisely cut according to the size, and is flattened, and the two sides and grooves are milled; S1.4: production of anchor box unit: the bearing plate and the inner connecting plate are precisely cut; the inner connecting plate is welded on the inner side of the bearing plate to form a bearing plate box; the anchor pad plate is welded on the end of the bearing plate box; S1.5: production of joint plate and anchor pull plate: the joint plate and anchor pull plate are precisely cut according to the size requirements, and the welding area of the anchor box unit is marked on the anchor pull plate; S2: assembly of structure: the structure is assembled in the form of fetal inversion; S2.1: welding of beam web joint plate: first, the upper horizontal plate unit is inverted on the jig, and the mounting position of the beam web joint plate is marked on the upper horizontal plate unit; the beam web joint plate is welded on the upper horizontal plate unit according to the marked position, and the beam web joint plate is embedded in the outer longitudinal rib. S2.2: welding of the inner vertical plate unit and the beam flange joint plate: after the welding of the beam web joint plate on the upper horizontal plate unit is completed, the inner vertical plate unit is first tightly attached to the side edge of the beam web joint plate, the side edge is tightly attached to the back of the upper horizontal plate unit and is welded, and the side edge of the inner vertical plate unit is located between the inner longitudinal rib and the outer longitudinal rib; then the beam flange joint plate is welded to the beam web joint plate; S2.3: welding of the outer vertical plate unit and the partition plate: the finished partition plate is laid along the extension direction of the upper horizontal plate unit, one side edge of the partition plate is tightly attached to the inner wall of the inner vertical plate unit, the other side edge of the partition plate is installed with the outer vertical plate unit and is welded, the side edge of the outer vertical plate unit is welded to the back of the upper horizontal plate unit, and the outer vertical plate unit, the upper horizontal plate unit and the inner vertical plate unit form a groove structure; S2.4: welding of the lower horizontal plate unit: after the welding of the groove structure formed in S2.3 is completed, the lower horizontal plate unit is welded to form a box structure; S2.5: welding of the anchor plate and the anchor box: after the welding of the lower horizontal plate unit is completed, the entire box structure is turned over, and the box structure system line is drawn, the anchor plate system line intersects with the upper horizontal plate; the anchor plate is assembled and welded based on the horizontal baseline, the direction and position of the anchor plate on the upper horizontal plate unit are controlled during the assembly and welding of the anchor plate, the bolt holes of the box structure are drilled after the assembly and welding of the anchor plate is completed, the holes are drilled based on the horizontal baseline, and finally the anchor box is welded on the anchor plate to complete the manufacturing.

2. A method of manufacturing a parallelogram strut structure according to claim 1, characterised in that: In the production of the vertical plate unit in S1.1, the node plate is cut and blanked by numerical control during the node plate numerical control cutting and blanking, the node plate is first connected and inspected, and then the whole is blanked to ensure the shape of the node plate, and the connection position avoids the position of the rod weld.

3. A method of manufacturing a parallelogram strut structure according to claim 1, characterised in that: In the production of the upper horizontal plate unit in S1.2, the both ends of the inner longitudinal rib and the both ends of the outer longitudinal rib welded on the upper horizontal plate are provided with embedded segments, the embedded segment of the outer longitudinal rib is welded after the chord upper bridge, and a plurality of connecting bolt holes are formed on the embedded segment.

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