High-pressure resistant metal expansion joint with multi-layer armored wire mesh structure

Abstract

The application relates to the technical field of expansion joints, in particular to a high-pressure-resistant metal expansion joint with a multi-layer armored wire mesh structure, which comprises a circular pipe; the circular pipe is slidably connected between flange one and flange two; a rubber ring is fixed to each end of the circular pipe; the circular pipe and the rubber ring are combined to guide the fluid, effectively preventing the fluid from directly impacting the corrugated pipe and avoiding turbulence; meanwhile, the fluid cannot flow into the interlayer between the corrugated pipe and the circular pipe, thereby avoiding the problems of deterioration and corrosion caused by long-term fluid retention; compared with the mode of directly arranging an integrated long rubber cylinder between the flange one and the flange two to guide the fluid, the advantage of the expansion joint in the combination of the circular pipe and the rubber ring lies in that, after the fluid pressure acts on the rubber ring, the rubber ring abuts against the inner sides of the flange one and the flange two, and the expansion phenomenon does not occur, so that the position of the long rubber cylinder corresponding to the corrugated pipe is prevented from expanding to cause the change of the flow passage inner diameter, and turbulence is avoided.

Description

Technical Field

[0001] This invention relates to the technical field of expansion joints. More specifically, this invention relates to a high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure. Background Technology

[0002] An expansion joint is a flexible element used to compensate for axial displacement in a piping system. It mainly consists of a bellows, supports, and flanges fixed at both ends of the bellows. During installation, it is connected to the piping system through the flanges, utilizing the expansion and contraction capacity of the bellows to compensate for axial displacement caused by factors such as thermal expansion and contraction.

[0003] To prevent turbulence when fluid flows through the bellows, existing expansion joints typically incorporate a flow-guiding sleeve inside. One end of this sleeve is welded to a flange, while the other end is suspended inside the flange on the opposite side and not connected to it. Fluid enters from the welded end of the sleeve and flows along its inner cavity towards the non-welded end, thus guiding the flow direction and preventing turbulence caused by fluid impacting the bellows.

[0004] However, there is a certain annular gap between the non-welded end of the sleeve and the corresponding flange, through which some fluid can seep into the interlayer space between the sleeve and the bellows. This stagnant liquid cannot be discharged with the main flow and accumulates in the interlayer over a long period of time, easily causing sedimentation, deterioration, and even localized corrosion, affecting the service life and safety of the expansion joint. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, where the gap between the non-welded end of the sleeve and the flange causes some fluid to seep into the interlayer space and cannot be discharged, easily leading to deposition, deterioration, or even localized corrosion, the present invention provides a high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure.

[0006] The technical solution of this invention is: a high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure, comprising a flange one, a bellows, and a flange two fixed to the bellows; the bellows is fixed to flange one and is located between flange one and flange two; it also includes a round pipe; the round pipe is slidably connected between flange one and flange two; a rubber ring is fixed to both ends of the round pipe; the rubber ring is elastic; flange one and flange two are in contact with the corresponding rubber ring; a circular ring one is fixed to each rubber ring; flange one and flange two are in contact with the corresponding circular ring one; a circular ring two is fixed to flange one and flange two, and the circular ring two is fixed to the corresponding circular ring one.

[0007] Furthermore, it also includes wire mesh rings; a wire mesh ring is fixed to both ends of the round tube, the wire mesh ring is fixed to the corresponding rubber ring, and the wire mesh ring is fixed to the corresponding round ring; the wire mesh ring is elastic.

[0008] Furthermore, it also includes a protrusion 1; several protrusions 1 are fixedly connected to each ring 1; several grooves 1 are opened on flange 1 and flange 2; several grooves 2 are opened on flange 1 and flange 2, and grooves 2 are connected to grooves 1.

[0009] Furthermore, it also includes a second protrusion; several second protrusions are fixed to both ends of the round tube; several third grooves are opened on flange one and flange two, and the third grooves are connected to the corresponding first grooves; several fourth grooves are opened on flange one and flange two, and the fourth grooves are connected to the corresponding third grooves.

[0010] Furthermore, the rubber ring is made of a high-temperature resistant material.

[0011] Furthermore, a sealing ring is provided between flange one and the corresponding ring two; a sealing ring is provided between flange two and the corresponding ring two.

[0012] Furthermore, a sealing ring is provided between ring one and ring two.

[0013] Furthermore, both flange one and flange two have their outer surfaces coated with paint.

[0014] Furthermore, the inner wall of the round tube is coated with an anti-corrosion layer.

[0015] Furthermore, the outer surfaces of bump one and bump two are set to smooth surfaces.

[0016] The beneficial effects are as follows: First, the combination of the round pipe and the rubber ring guides the fluid, effectively preventing the fluid from directly impacting the bellows and avoiding turbulence. At the same time, the fluid cannot flow into the interlayer between the bellows and the round pipe, thus avoiding deterioration and corrosion caused by long-term fluid retention. Moreover, compared with the method of directly setting an integral long rubber cylinder between flange one and flange two for flow guidance, the advantage of this expansion joint using a combination of round pipe and rubber ring for flow guidance is that after the fluid pressure acts on the rubber ring, the rubber ring abuts against the inner side of flange one and flange two and will not expand. This avoids the expansion of the long rubber cylinder corresponding to the bellows and the resulting change in the inner diameter of the flow channel, thereby avoiding turbulence.

[0017] Second, the circular pipe used to guide the fluid can also restrict the movement direction of flange one and flange two, so that no additional support mechanism is needed on the outside of this expansion joint, making the structure of this expansion joint more compact.

[0018] Third, when tightening ring two onto ring one, ring one is supported by the cooperation of protrusion one and groove two. At this time, no additional manual support is required, which helps to reduce the difficulty of operation. At the same time, the sliding round tube is limited by the cooperation of protrusion two and groove four, avoiding the problem of reset failure caused by the end of the round tube disengaging from flange one or flange two, thus ensuring the normal use of this expansion energy-saving device. Attached Figure Description

[0019] Figure 1 A schematic diagram of the high-pressure resistant metal expansion joint with multi-layer armored wire mesh structure of the present invention is shown;

[0020] Figure 2 A cross-sectional view of the high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure of the present invention is shown.

[0021] Figure 3 A schematic diagram of the structure of the first ring and the second ring of the present invention is shown;

[0022] Figure 4 A front view of the circular tube, rubber ring, and circular ring 1 of the present invention is shown;

[0023] Figure 5 An exploded view of flange one, protrusion one, and protrusion two of the present invention is shown;

[0024] Figure 6 A schematic diagram showing the installation positions of protrusion one and protrusion two of the present invention is provided.

[0025] In the attached diagram, the following labels are used: 1-Flange 1, 2-Bellboard, 3-Flange 2, 4-Round pipe, 5-Rubber ring, 6-Round ring 1, 7-Round ring 2, 8-Wire mesh ring, 9-Protrusion 1, 10-Protrusion 2, 91-Groove 1, 92-Groove 2, 93-Groove 3, 94-Groove 4. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0027] Example 1: A high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure, such as... Figures 1-3 As shown, it includes flange 1, bellows 2, and flange 3; bellows 2 is welded to flange 1; flange 3 is welded to bellows 2, and the bellows 2 is located between flange 1 and flange 3; it also includes a circular pipe 4, rubber rings 5, circular ring 6, and circular ring 7; a circular pipe 4 is slidably connected between flange 1 and flange 3, and the circular pipe 4 is made of alloy material; a rubber ring 5 is fixed to both ends of the circular pipe 4; the rubber rings 5 ​​are elastic; flange 1 contacts the corresponding rubber ring 5; flange 3 contacts the corresponding rubber ring 5; a circular ring 6 is fixed to each rubber ring 5; flange 1 contacts the corresponding circular ring 6; flange 3 contacts the corresponding circular ring 6; a circular ring 7 is bolted to both flange 1 and flange 3, and circular ring 7 is bolted to the corresponding circular ring 6.

[0028] It also includes a wire mesh ring 8; a wire mesh ring 8 is fixed to both ends of the round tube 4, the wire mesh ring 8 is fixed to the corresponding rubber ring 5, and the wire mesh ring 8 is fixed to the corresponding circular ring 6; the wire mesh ring 8 is elastic, and the structural stability of the rubber ring 5 is improved by the wire mesh ring 8.

[0029] First, flange 1 is installed in the external piping system using bolts. Then, flange 3 is manually pulled to make it contact the external piping system. Flange 3 is then installed in the external piping system using bolts. During this process, flange 3 stretches the bellows 2, causing the right-hand ring 7 to move to the right. The right-hand ring 7 then moves the right-hand ring 6 to the right, while the left-hand ring 6 is fixed stationary by flange 1. This stretches the rubber ring 5 and allows the circular pipe 4 to slide adaptively inside flanges 1 and 3. When the external piping system experiences axial displacement, it moves flanges 1 and 3, causing the rubber ring 5 to stretch or rebound adaptively. This ensures that the inner side of the bellows 2 always forms a circular channel composed of the circular pipe 4, rubber ring 5, ring 6, and ring 7, and the inner side of this circular channel remains smooth without any steps. When fluid is transported, the fluid flows through this circular channel. The fluid flows smoothly without turbulence or disturbance, and it cannot flow into the space between the bellows 2 and the circular pipe 4, thus avoiding corrosion and deterioration caused by prolonged fluid accumulation in this space. During use, the circular pipe 4 and the rubber ring 5 work together to guide the fluid, preventing turbulence caused by fluid impacting the bellows 2. Furthermore, the fluid cannot flow into the space between the bellows 2 and the circular pipe 4, thus avoiding corrosion and deterioration caused by prolonged fluid accumulation in this space. Compared to directly placing a single long rubber cylinder between flange 1 and flange 2 for fluid guidance, the advantage of this expansion joint using the circular pipe 4 and the rubber ring 5 is that after the fluid pressure acts on the rubber ring 5, the rubber ring 5 rests against the inner side of flange 1 and flange 2, preventing expansion. This avoids the expansion of the long rubber cylinder corresponding to the bellows 2, which would cause changes in the inner diameter of the flow channel and thus prevent turbulence.

[0030] Typically, existing expansion joints should have a support mechanism between flange 1 and flange 3 to restrict the movement direction of flange 1 and flange 3, enabling them to properly compensate for the axial displacement of the pipeline system. Therefore, after installing a circular pipe 4 between flange 1 and flange 3 to guide the fluid, the circular pipe 4 can also restrict the movement direction of flange 1 and flange 3, thus enabling them to properly compensate for the axial displacement of the pipeline system. Furthermore, both ends of the circular pipe 4 should always be located inside flange 1 and flange 2, allowing the circular pipe 4 to stably limit the radial movement of flange 1 and flange 2, ensuring that flange 1 and flange 2 can move axially stably. In use, the circular pipe 4 used to guide the fluid can also restrict the movement direction of flange 1 and flange 2, eliminating the need for an additional support mechanism on the outside of the expansion joint and making the structure of the expansion joint more compact.

[0031] The outer side of this expansion joint is a bellows 2 responsible for tensile deformation, and the inner side is a circular pipe 4 and a rubber ring 5 responsible for flow guidance. The circular pipe 4 can guide high-pressure fluid and can also be used to support flange 1 and flange 3. A wire mesh ring 8 is set inside the rubber ring 5, which can improve the structural stability of the rubber ring 5, thereby making this expansion joint form a multi-layer armored wire mesh structure with strong structural stability.

[0032] Example 2, based on Example 1, such as Figures 4-6 As shown, it also includes a protrusion 9; two protrusions 9 are welded on each ring 6, and the protrusions 9 are made of alloy material; two grooves 91 are opened on flange 1 and flange 3; two grooves 92 are opened on flange 1 and flange 3, and grooves 92 are connected to grooves 91. The protrusions 9 and grooves 92 cooperate to limit the ring 6.

[0033] It also includes a second protrusion 10; two protrusions 10 are welded to both ends of the round tube 4, and the protrusions 10 are made of alloy material; two grooves 93 are opened on both flange 1 and flange 3, and grooves 93 are connected to the corresponding grooves 91; two grooves 94 are opened on both flange 1 and flange 3, and grooves 94 are connected to the corresponding grooves 93. The round tube 4 is limited by the cooperation of the protrusions 10 and the grooves 94.

[0034] The rubber ring 5 is made of a high-temperature resistant material.

[0035] A sealing ring is provided between flange 1 and the corresponding ring 7; a sealing ring is provided between flange 3 and the corresponding ring 7 to improve sealing performance.

[0036] A sealing ring is provided between ring 6 and ring 7 to improve the sealing performance.

[0037] Both flange 1 and flange 2 3 have their outer surfaces coated with paint for rust prevention.

[0038] The inner wall of the round tube 4 is coated with an anti-corrosion layer.

[0039] The outer surfaces of bump 9 and bump 10 are set to be smooth to reduce friction.

[0040] During the assembly of this expansion joint, the circular tube 4, rubber ring 5, and circular ring 6 are inserted as a whole into the middle of the inner sides of flange 1, bellows 2, and flange 3. Then, two circular rings 7 are fixed to flange 1 and flange 3 respectively using screws. Next, circular rings 7 are tightened onto circular ring 6 to complete the assembly. However, during the tightening of circular rings 7 onto circular ring 6, the elasticity of rubber ring 5 prevents it from providing sufficient support to circular ring 6. This necessitates manually pressing and limiting circular ring 6. Tightening ring 7 onto ring 6 using screws is difficult. Therefore, a protrusion 9 is installed on ring 6. When the round pipe 4, rubber ring 5, and ring 6 are inserted as a whole into the middle of the inner side of flange 1, bellows 2, and flange 2, ring 6 drives protrusion 9 to move to the inner side of groove 91, aligning protrusion 9 with groove 2 92. Then, manually rotating the round pipe 4, rubber ring 5, and ring 6 as a whole causes ring 6 to rotate protrusion 9, moving it to the end of groove 2 92. At this point, the position of protrusion 9 is as follows: Figure 6 As shown, during the process of tightening ring 2 7 onto ring 1 6 using screws, ring 1 6 is limited by the cooperation of protrusion 1 9 and groove 2 92, thus providing sufficient support for the tightening operation without the need for manual additional support, which helps to reduce the difficulty of operation. In use, when tightening ring 2 7 onto ring 1 6, ring 1 6 is supported by the cooperation of protrusion 1 9 and groove 2 92, and at this time, no manual additional support operation is required, which helps to reduce the difficulty of operation.

[0041] During the use of this expansion joint, the force applied to flange 1 and flange 2 3 during the displacement of the external pipeline system is uncertain, resulting in different force conditions on the two rubber rings 5. This leads to an uncertainty in the stretching distance of the two rubber rings 5. If the stretching distance of one rubber ring 5 is too large, the end of the circular pipe 4 near the stretched rubber ring 5 may cross the inner side of flange 1 (or flange 2 3), causing flange 1 (or flange 2 3) to stop limiting one end of the circular pipe 4. At this time, the end of the circular pipe 4 may tilt slightly under the action of fluid pressure, resulting in the end of the circular pipe 4 and flange 1 ( If flange 2 (or flange 3) becomes misaligned, causing the end of the circular pipe 4 to become stuck with flange 1 (or flange 2 (or flange 3)) and unable to reset, thus causing the expansion joint to malfunction, a protrusion 2 (or flange 3) is installed on the circular pipe 4. When the circular pipe 4, rubber ring 5, and circular ring 1 (or flange 2 (or flange 3)) are inserted as a whole into the middle of the inner side of flange 1 (or flange 2 (or flange 3), the circular pipe 4 drives the protrusion 2 (or flange 3 (or flange 4 (or flange 3 (or flange 1 ( or flange 2 ( or flange 3 ...?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" ("" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" (?" ("""""""""" (?" "" ?" ?" ?" ?" ?" ?" ?" ?" ) ") ") Figure 6 As shown, during the use of this expansion joint, the round tube 4 slides between flange 1 and flange 3, causing the round tube 4 to drive the protrusion 10 to slide within the groove 94. At this time, the round tube 4 is limited by the cooperation of the protrusion 10 and the groove 94, preventing its end from detaching from flange 1 (or flange 3), thus avoiding the problem of reset failure. In use, the sliding round tube 4 is limited by the cooperation of the protrusion 10 and the groove 94, avoiding the problem of reset failure caused by its end detaching from flange 1 (or flange 3), thus ensuring that this expansion joint can be used normally.

[0042] The technical principles of the embodiments of the present invention have been described above with reference to specific examples. These descriptions are merely for explaining the principles of the embodiments of the present invention and should not be construed as limiting the scope of protection of the embodiments of the present invention in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these embodiments will all fall within the scope of protection of the embodiments of the present invention.

Claims

1. A high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure, comprising a flange one (1), a bellows (2), and a flange two (3); the bellows (2) is fixedly connected to the flange one (1), and the other end of the bellows (2) is fixedly connected to the flange two (3); characterized in that: It also includes a round pipe (4); a round pipe (4) is slidably connected between flange one (1) and flange two (3); a rubber ring (5) is fixed at both ends of the round pipe (4); the rubber ring (5) is elastic; flange one (1) and flange two (3) are in contact with the corresponding rubber ring (5); a circular ring one (6) is fixed on each rubber ring (5); flange one (1) and flange two (3) are in contact with the corresponding circular ring one (6); a circular ring two (7) is fixed on flange one (1) and flange two (3), and the circular ring two (7) is fixed to the corresponding circular ring one (6); It also includes a wire mesh ring (8); a wire mesh ring (8) is fixed to both ends of the round tube (4), the wire mesh ring (8) is fixed to the corresponding rubber ring (5), and the wire mesh ring (8) is fixed to the corresponding circular ring (6); the wire mesh ring (8) is elastic; It also includes a protrusion 1 (9); several protrusions 1 (9) are fixed on each ring 1 (6); several grooves 1 (91) are opened on flange 1 (1) and flange 2 (3); several grooves 2 (92) are opened on flange 1 (1) and flange 2 (3), and grooves 2 (92) are connected to grooves 1 (91); It also includes a second protrusion (10); several second protrusions (10) are fixed to both ends of the round tube (4); several grooves (93) are opened on flange one (1) and flange two (3), and grooves three (93) are connected to the corresponding groove one (91); several grooves four (94) are opened on flange one (1) and flange two (3), and grooves four (94) are connected to the corresponding grooves three (93).

2. The high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure according to claim 1, characterized in that: The rubber ring (5) is made of a high-temperature resistant material.

3. The high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure according to claim 1, characterized in that: A sealing ring is provided between flange one (1) and the corresponding ring two (7); a sealing ring is provided between flange two (3) and the corresponding ring two (7).

4. A high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure according to any one of claims 1-3, characterized in that: A sealing ring is provided between the first ring (6) and the second ring (7).

5. A high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure according to claim 4, characterized in that: Both flange 1 (1) and flange 2 (3) are coated with paint on their outer surfaces.

6. A high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure according to claim 5, characterized in that: The inner wall of the round tube (4) is coated with an anti-corrosion layer.

7. A high-pressure resistant metal expansion joint with a multi-layer armored wire mesh structure according to claim 1, characterized in that: The outer surfaces of bump 1 (9) and bump 2 (10) are set to smooth surfaces.

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