Flange joint expansion joint

Abstract

The utility model relates to the technical field of expansion joint, specifically disclose a flange connection hinge type expansion joint, including first flange welding ring and second flane welding ring, the corrugated pipe is connected between first flange welding ring and second flane welding ring, two groups of first arc shaped backing plates are connected on the symmetry of first flange welding ring annular outer wall, two groups of second arc shaped backing plates are connected on the symmetry of second flange welding ring annular outer wall, the first arc shaped backing plate is connected with the link plate on the side away from first flange welding ring, the second arc shaped backing plate is connected with main hinge plate on the side away from second flange welding ring, the link plate side is connected with auxiliary hinge plate, and the pin axle spare is connected on auxiliary hinge plate, is used for limiting main hinge plate end portion in auxiliary hinge plate, in the utility model, the first arc shaped backing plate is rooted in the 0 degree and 180 degree orientation of first flange welding ring outer diameter circumference, and the first arc shaped backing plate is welded on first flange welding ring, does not occupy the extra space, guarantees the minimum installation length of expansion joint.

Description

Technical Field

[0001] This utility model relates to the field of expansion joint technology, specifically a flange-connected hinge type expansion joint. Background Technology

[0002] Expansion joints are a very important flexible connection component in piping systems. They are mainly used to absorb angular displacement of the pipeline in one or more planes, while restraining the axial and lateral displacement of the pipeline, and can withstand the internal pressure thrust of the pipeline. The two ends of the expansion joint are bolted to the flanges of the piping system through standard flanges, which is one of the most common connection methods, and is convenient for installation, disassembly and maintenance.

[0003] When the external dimensions of the expansion joint are limited, the existing structure directly welds the bellows to the flange without side pipe sections, which is not convenient for using load-bearing components such as vertical plates and sealing plates. To address these issues, a flange-connected hinged expansion joint is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a flange-connected hinge-type expansion joint to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flange-connected hinge-type expansion joint includes a first flange welding ring and a second flange welding ring, with a bellows connecting the first flange welding ring and the second flange welding ring. Two sets of first arc-shaped gaskets are symmetrically connected to the annular outer wall of the first flange welding ring, and two sets of second arc-shaped gaskets are symmetrically connected to the annular outer wall of the second flange welding ring. A connecting plate is connected to the side of the first arc-shaped gasket away from the first flange welding ring, and a main hinge plate is connected to the side of the second arc-shaped gasket away from the second flange welding ring. A secondary hinge plate is connected to one side of the connecting plate, and a pin is connected to the secondary hinge plate to limit the end of the main hinge plate within the secondary hinge plate.

[0007] The pin component includes a pin rotatably mounted on the secondary hinge plate, the pin being connected to the main hinge plate via a mating part, and a limiting part for restricting the rotation of the pin being connected to the end of the pin.

[0008] In one alternative embodiment: the mating component includes two sets of limiting blocks connected to the side wall of the pin shaft; the main hinge plate is provided with a through hole for the pin shaft shaft to pass through; the side wall of the through hole is connected to a limiting groove for the limiting block to pass through; the side of the secondary hinge plate away from the limiting component is provided with a through hole for the pin shaft shaft and the limiting block to pass through; the side of the secondary hinge plate near the limiting component is provided with a rotating hole for the pin shaft shaft to pass through.

[0009] In one alternative: the limiting member includes a positioning bolt passing through the bottom end of the pin, one end of the positioning bolt is fixedly connected to a cam, and the other end of the positioning bolt is threadedly connected to a nut. Both sides of the bottom end of the pin are provided with a plane that contacts the cam or the nut. The side of the secondary hinge plate near the limiting member is provided with a limiting groove for the long end of the cam to be inserted.

[0010] In one alternative: it also includes a universal joint that can be connected to the secondary hinge plate and the main hinge plate.

[0011] In one alternative: the universal joint includes a horizontal bar and vertical bars connected to both ends of the horizontal bar, the horizontal bar having a circular hole with an inner diameter larger than the outer diameter of the pin shaft body, and the end of the vertical bar away from the horizontal bar being connected to a secondary hinge plate.

[0012] In one alternative: two sets of horizontal bars are arranged in parallel, and vertical bars are connected to the top and bottom of the secondary hinge plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In this invention, the first arc-shaped gasket is rooted at 0° and 180° on the outer diameter of the first flange welding ring. The first arc-shaped gasket is welded to the first flange welding ring, which does not occupy extra space and ensures the minimum installation length of the expansion joint.

[0015] In this invention, the first arc-shaped pad is anchored at 0° and 180° positions on the outer diameter of the first flange welding ring, and the second arc-shaped pad 21 installed on the second flange welding ring corresponds to the position of the first arc-shaped pad 11, allowing for planar single-axis rotation.

[0016] The universal joint in this invention allows the first flange welding ring and the second flange welding ring to rotate relative to the pin axis at 0° and 180° or relative to the pin axis at 90° and 270°. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.

[0018] Figure 2 This is a partial structural schematic diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of a partially disassembled structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0021] Figure 5 This is a schematic diagram of the universal joint in this utility model.

[0022] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of this utility model.

[0023] In the diagram: 1. First flange welding ring; 11. First arc-shaped gasket; 12. Connecting plate; 2. Second flange welding ring; 21. Second arc-shaped gasket; 22. Main hinge plate; 23. Through hole; 24. Limiting groove; 3. Bellows; 4. Secondary hinge plate; 41. Through hole; 42. Rotating hole; 43. Groove; 5. Pin; 51. Pin; 52. Positioning bolt; 53. Nut; 54. Cam; 55. Limiting block; 6. Universal joint; 61. Horizontal bar; 62. Vertical bar; 63. Round hole. Detailed Implementation

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] Please see Figures 1-3 In this embodiment, a flange-connected hinge-type expansion joint includes a first flange welding ring 1 and a second flange welding ring 2, with a bellows 3 connected between the first flange welding ring 1 and the second flange welding ring 2; the first flange welding ring 1, the second flange welding ring 2 and the bellows 3 form a basic connection structure, and both the first flange welding ring 1 and the second flange welding ring 2 can be connected to external pipelines.

[0028] Two sets of first arc-shaped gaskets 11 are symmetrically connected to the annular outer wall of the first flange welding ring 1, and two sets of second arc-shaped gaskets 21 are symmetrically connected to the annular outer wall of the second flange welding ring 2. A connecting plate 12 is connected to the side of the first arc-shaped gasket 1 away from the first flange welding ring 1, and a main hinge plate 22 is connected to the side of the second arc-shaped gasket 2 away from the second flange welding ring 2. A secondary hinge plate 4 is connected to one side of the connecting plate 12, and a pin 5 is connected to the secondary hinge plate 4 to limit the end of the main hinge plate 22 within the secondary hinge plate 4. The structure of the bellows 3 extension section is set according to actual needs, and can be a straight edge or a beveled edge. The first arc-shaped gaskets 11 are rooted at 0° and 180° positions on the outer diameter circumference of the first flange welding ring 1. The first arc-shaped gaskets 11 are welded to the first flange welding ring 1, without occupying extra space, ensuring the minimum installation length of the expansion joint.

[0029] The pin component 5 includes a pin 51 rotatably mounted on the secondary hinge plate 4. The pin 51 is connected to the main hinge plate 22 through a mating part. The end of the pin 51 is connected to a limiting part for restricting the rotation of the pin 51.

[0030] Please see Figure 3 The docking component includes two sets of limiting blocks 55 connected to the side wall of the pin 51. The main hinge plate 22 is provided with a through hole 23 for the pin 51 shaft to pass through. The side wall of the through hole 23 is connected to a limiting groove 24 for the limiting block 55 to pass through. The side of the secondary hinge plate 4 away from the limiting component is provided with a through hole 41 for the pin 51 shaft and the limiting block 55 to pass through. The side of the secondary hinge plate 4 close to the limiting component is provided with a rotating hole 42 for the pin 51 shaft to pass through.

[0031] The main hinge plate 22 is placed inside the secondary hinge plate 4. The shaft of the pin 51 passes through the through hole 41. Then the limiting block 55 is placed in the limiting groove 24. When the main hinge plate 22 rotates, it will drive the pin 51 to rotate. The first flange welding ring 1 and the second flange welding ring 2 can rotate relative to each other. During rotation, they rotate around the axis of the pin 51.

[0032] Please see Figure 3 The limiting component includes a positioning bolt 52 passing through the bottom end of the pin 51. One end of the positioning bolt 52 is fixedly connected to the cam 54, and the other end of the positioning bolt 52 is threadedly connected to the nut 53. Both sides of the bottom end of the pin 51 are provided with a plane that contacts the cam 54 or the nut 53. The side of the secondary hinge plate 4 near the limiting component is provided with a limiting groove for the long end of the cam 54 to be inserted.

[0033] In the handling or pipeline installation of expansion joints or other applications where it is necessary to stabilize the position of the expansion joint, the nut 53 can be loosened to facilitate the rotation of the positioning bolt 52. Then, the long end of the cam 54 can be placed in the limiting groove, and the nut 53 can be tightened to limit the rotation of the cam 54. The rotation of the pin 51 is limited.

[0034] In this embodiment, during planar single-axis rotation, the first arc-shaped pad 11 is anchored at 0° and 180° positions on the outer diameter circumference of the first flange welding ring 1. The second arc-shaped pad 21 installed on the second flange welding ring 2 corresponds to the position of the first arc-shaped pad 11. When the pipeline is displaced due to temperature changes or mechanical vibration, the angle of the two sets of externally connected pipelines changes in one plane. For example, the inconsistent changes in the length of the two arms of the L-shaped pipe section cause the angle at the corner to change. Due to its own extensibility and flexibility, the corrugated pipe 3 can effectively absorb these displacements and prevent the pipeline from being damaged due to stress concentration. At the same time, the force acting on the expansion joint will cause the main hinge plate 22 and the secondary hinge plate 4 to rotate relative to each other.

[0035] Example 2

[0036] Please see Figure 4 and Figure 5 Unlike Embodiment 1, it also includes a universal joint 6 that can be connected to the secondary hinge plate 4 and the main hinge plate 22.

[0037] The universal joint 6 includes a horizontal bar 61 and a vertical bar 62 connected to both ends of the horizontal bar 61. The horizontal bar 61 is provided with a circular hole 63 with an inner diameter larger than the outer diameter of the shaft body of the pin 51. The end of the vertical bar 62 away from the horizontal bar 61 is connected to the secondary hinge plate 4.

[0038] In this embodiment, the first arc-shaped pad 11 is anchored at 0° and 180° positions on the outer diameter circumference of the first flange welding ring 1. When the second flange welding ring 2 is connected to one side of the bellows 3, the installation angle of the second flange welding ring 2 can be adjusted so that the second arc-shaped pad 21 is located at 90° and 270° positions on the outer diameter circumference of the second flange welding ring 2. The horizontal bar 61 at the bottom is installed on the secondary hinge plate 4 on one side of the connecting plate 12. The secondary hinge plate 4 on the vertical bar 62 is connected to the main hinge plate 22 on one side of the second flange welding ring 2. The first flange welding ring 1 and the second flange welding ring 2 can rotate relative to the axis of the pin 51 at 0° and 180° positions, or relative to the axis of the pin 51 at 90° and 270° positions.

[0039] Example 3

[0040] Please see Figure 6 The difference from Embodiment 2 is that the horizontal bars 61 are arranged in two parallel sets, and the top and bottom of the secondary hinge plate 4 are connected to the vertical bars 62;

[0041] In this embodiment, the horizontal bar 61, the vertical bar 62, and the secondary hinge plate 4 are arranged in a ring to improve the stability of the movement.

[0042] In actual use, the two sets of vertical bars 62 on the same side can also be replaced by a set of horizontal bars 61, and then the universal joint 6 is formed by four sets of identical horizontal bars 61. At this time, the pin 51 passes through the round hole 63.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A flange-connected hinged expansion joint, comprising a first flange welding ring (1) and a second flange welding ring (2), wherein a bellows (3) is connected between the first flange welding ring (1) and the second flange welding ring (2); Its features are, Two sets of first arc-shaped pads (11) are symmetrically connected on the outer wall of the first flange welding ring (1), and two sets of second arc-shaped pads (21) are symmetrically connected on the outer wall of the second flange welding ring (2). The first arc-shaped pad (11) is connected to a connecting plate (12) on the side away from the first flange welding ring (1), and the second arc-shaped pad (21) is connected to a main hinge plate (22) on the side away from the second flange welding ring (2). The connecting plate (12) is connected to a secondary hinge plate (4) on one side, and a pin (5) is connected to the secondary hinge plate (4) to limit the end of the main hinge plate (22) within the secondary hinge plate (4). The pin component (5) includes a pin (51) rotatably mounted on the secondary hinge plate (4). The pin (51) is connected to the main hinge plate (22) through a mating part. The end of the pin (51) is connected to a limiting part for restricting the rotation of the pin (51).

2. The flange connection hinge type expansion joint according to claim 1, characterized in that: The docking component includes two sets of limiting blocks (55) connected to the side wall of the pin (51). The main hinge plate (22) is provided with a through hole (23) for the pin (51) shaft to pass through. The side wall of the through hole (23) is connected to a limiting groove (24) for the limiting block (55) to pass through. The side of the secondary hinge plate (4) away from the limiting component is provided with a through hole (41) for the pin (51) shaft and the limiting block (55) to pass through. The side of the secondary hinge plate (4) close to the limiting component is provided with a rotating hole (42) for the pin (51) shaft to pass through.

3. The flange connection hinge type expansion joint according to claim 2, characterized in that: The limiting component includes a positioning bolt (52) that passes through the bottom end of the pin (51). One end of the positioning bolt (52) is fixedly connected to the cam (54), and the other end of the positioning bolt (52) is threadedly connected to the nut (53). Both sides of the bottom end of the pin (51) are provided with a plane that contacts the cam (54) or the nut (53). The secondary hinge plate (4) is provided with a limiting groove on the side near the limiting component for the long end of the cam (54) to be inserted.

4. The flange connection hinge type expansion joint according to claim 1, characterized in that: It also includes a universal joint (6) that can be connected to the secondary hinge plate (4) and the main hinge plate (22).

5. A flange-connected hinged expansion joint according to claim 4, characterized in that: The universal joint (6) includes a horizontal bar (61) and vertical bars (62) connected to both ends of the horizontal bar (61). The horizontal bar (61) has a round hole (63) with an inner diameter larger than the outer diameter of the shaft body of the pin (51). The end of the vertical bar (62) away from the horizontal bar (61) is connected to the secondary hinge plate (4).

6. A flange connection hinged expansion joint according to claim 5, characterized in that: Two sets of horizontal bars (61) are arranged in parallel, and vertical bars (62) are connected to the top and bottom of the secondary hinge plate (4).

Images