Explosion-proof expansion joint pipe

Abstract

The utility model relates to an anti-explosion expansion joint pipe which comprises a corrugated hose, flange joints connected to the two ends of the corrugated hose, a length limiting rod connected between the flange joints, and an expansion stopping ring arranged at a concave corrugated joint outside a corrugated joint of the corrugated hose in a sleeving mode. The at least two length limiting rods are located on the outer side of the corrugated hose and arranged in the length direction of the corrugated hose. The two ends of the length limiting rod are each provided with a limiting piece for preventing the distance between the flange ends from changing. The anti-explosion expansion joint pipe not only can meet the requirement for compensating additional stress caused by temperature and mechanical vibration, but also can avoid the situation that the distance between the flange joints at the two ends of the corrugated hose is not changed, and therefore the problem that burst accidents occur under the impact of high-speed fluid is solved.

Description

Technical Field

[0001] The utility model relates to the field of expansion pipes, in particular to an explosion-proof expansion joint pipe. Background Art

[0002] During ship construction and operation, to compensate for additional stress caused by temperature and mechanical vibration, a flexible structure—an expansion joint, also called an expansion joint pipe—is installed in the vessel hull or piping. This bellows structure effectively expands and contracts to absorb dimensional changes caused by thermal expansion and contraction of pipelines, conduits, and vessels.

[0003] During on-site construction, due to construction errors and high-temperature deformation, the expansion joint has a certain torque, which may cause a burst accident under the impact of high-speed fluid, thereby reducing the service life of the expansion joint and causing damage, requiring replacement or repair, which may seriously cause safety accidents. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an explosion-proof expansion joint pipe. By setting a length limit rod, it effectively avoids the large pulling force between the two ends of the expansion joint pipe from damaging the expansion joint pipe, thereby extending the service life.

[0005] The technical objectives of this utility model are achieved through the following technical solutions:

[0006] Disclosed is an explosion-proof expansion joint pipe, comprising a corrugated hose, flange joints connected at both ends of the corrugated hose, a length limiting rod connected between the flange joints, and an expansion stop ring sleeved on a corrugated joint that is recessed outside the corrugated joint of the corrugated hose; at least two length limiting rods are located on the outside of the corrugated hose and are arranged along the length direction of the corrugated hose; and both ends of the length limiting rods are provided with limit members for preventing the distance between the flange ends from changing.

[0007] Furthermore, the limiting piece is a limiting block, which is provided with a first mounting hole and a second mounting hole. The end of the length limiting rod is provided with an external thread and passes through the first mounting hole. Locking nuts that cooperate with the external thread of the length limiting rod are respectively provided on both sides of the first mounting hole; a connecting bolt for connecting the limiting block to the bolt mounting hole of the flange joint is passed through the second mounting hole.

[0008] Furthermore, the limiting part includes two separate limiting plates, each of which is provided with a third mounting hole. The end of the length limiting rod is provided with an external thread and passes through the third mounting holes of the two limiting plates at the same time. A locking nut is provided for each limiting plate to cooperate with the external thread of the limiting rod. The locking nut clamps the two limiting plates from both sides to form a clamping space between the two limiting plates, and the clamping space is clamped at the edge of the flange end of the flange joint.

[0009] Furthermore, two second mounting holes are provided on the limit block, the second mounting holes and the first mounting holes are distributed in a triangular shape, the second mounting holes are distributed in an arc shape and correspond to two adjacent or spaced bolt mounting holes on the flange end.

[0010] Furthermore, the expansion stop ring is separated from the length limiting rod.

[0011] Furthermore, the expansion stop ring is connected to the length limiting rod.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The explosion-proof expansion joint pipe of the utility model can not only meet the need to compensate for the additional stress caused by temperature and mechanical vibration, but also prevent the distance between the flange joints at both ends of the corrugated hose from changing, thereby avoiding the problem of explosion accidents under high-speed fluid impact.

[0014] The setting of the expansion stop ring can prevent the corrugated hose from expanding and deforming due to liquid impact, vibration, temperature change, etc. in the corrugated hose, resulting in radial changes.

[0015] In addition, the novel explosion-proof expansion joint pipe used in the present invention has a simple structure, is convenient for processing or modifying existing expansion joint pipes, and has relatively universal applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the explosion-proof expansion joint pipe in Example 1 of the present utility model.

[0017] Figure 2 This is a schematic diagram of the limit block structure in Example 1 of the present utility model.

[0018] Figure 3 It is a structural schematic diagram of the explosion-proof expansion joint pipe in Example 2 of the present utility model.

[0019] Figure 4 It is a structural schematic diagram of the explosion-proof expansion joint pipe in Example 3 of the present utility model.

[0020] Figure 5 It is a structural schematic diagram of the explosion-proof expansion joint pipe in Example 4 of the present utility model.

[0021] In the picture:

[0022] 1. Corrugated hose; 2. Flange joint; 3. Length limit rod; 4. Expansion ring; 5. Limit block; 6. First mounting hole; 7. Second mounting hole; 8. Lock nut; 9. Connecting bolt; 10. Flange end; 11. Limit plate; 12. Limit plate; 13. Clamp structure; 14. Connecting plate. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with specific embodiments:

[0024] Example 1

[0025] An explosion-proof expansion joint pipe, such as Figure 1 As shown, it includes a corrugated hose 1, flange joints 2 connected to both ends of the corrugated hose 1, a length limiting rod 3 connected between the flange joints 2, and an expansion ring 4 sleeved on the corrugated section of the corrugated hose 1. The length limiting rods 3 are at least two, and the length limiting rods 3 are located on the outside of the corrugated hose 1 and are arranged along the length direction of the corrugated hose. The corrugated hose 1 is such as a common stainless steel corrugated hose or a rubber corrugated hose.

[0026] The two ends of the length limiting rod 3 are respectively provided with a limiting piece to prevent the distance between the flange ends from changing. The limiting piece is a limiting block 5. Figure 2 As shown, the limit block 5 is provided with a first mounting hole 6 and a second mounting hole 7. The end of the length limiting rod 3 is provided with an external thread and passes through the first mounting hole 6. Lock nuts 8 are provided on both sides of the first mounting hole 6 and engage with the external thread of the length limiting rod 3. Connecting bolts 9 are passed through the second mounting holes 7 to connect the limit block 5 to the bolt mounting holes of the flange joint 2. Each flange joint 2 is provided with a bolt mounting hole for the connecting bolt, and the connecting bolts are used to connect the flange joint to the flange end 10 of another rigid pipeline.

[0027] Preferably, two second mounting holes 7 are provided on the limit block 5, and the second mounting holes 7 and the first mounting holes 6 are distributed in a triangular shape. The second mounting holes 7 are distributed in a circular arc shape and correspond to two adjacent or spaced bolt mounting holes on the flange end. When the connection between the flange joint 2 and the flange end 10 is realized, the limit block 5 is connected together.

[0028] Preferably, the sides where the two second mounting holes 7 are located are recessed inwardly in a circular arc, which can avoid the impact between the two second mounting holes 7 and the outer wall of the pipeline during installation to a certain extent.

[0029] The expansion ring and the length limiting rod can be separated from each other. The expansion ring adopts an elastic and flexible expansion ring, such as a rubber rope, a binding belt, etc.; the expansion ring and the length limiting rod can also be connected. In this case, the expansion ring is preferably a rigid expansion ring. Figure 4 .

[0030] Example 2

[0031] An explosion-proof expansion joint pipe, such as Figure 3As shown, it includes a corrugated hose 1, flange joints 2 connected to both ends of the corrugated hose 1, a length limiting rod 3 connected between the flange joints 2, and an expansion ring 4 sleeved on the corrugated section of the corrugated hose 1 at the corrugated section. The expansion ring is separated from the length limiting rod and the expansion ring 4 is an elastic expansion ring; there are at least two length limiting rods 3, which are located on the outside of the corrugated hose 1 and arranged along the length direction of the corrugated hose;

[0032] Both ends of the length limiting rod 3 are respectively provided with limit members to prevent the distance between the flange end heads from changing. The limit members include two separate limit plates 12. The limit plates 12 are provided with a third mounting hole. The end of the length limiting rod 3 is provided with an external thread and passes through the third mounting holes of the two limit plates 12 at the same time. Corresponding to each limit plate 12, a locking nut 8 is respectively provided to cooperate with the external thread of the limit rod 3. The locking nut 8 clamps the two limit plates 12 from both sides, and a clamping space is formed between the two limit plates 12. The clamping space is clamped at the edge of the flange end head of the flange joint 2, more specifically, it is clamped at both sides of the flange joint 2 and the flange end 10.

[0033] Example 3

[0034] The difference from Example 2 is that the expansion ring 4 is connected to the length limiting rod 3, as shown in FIG. Figure 4 As shown, the expansion stop ring is a rigid and hard expansion stop ring, which includes two opposing hoop structures, which are connected to a connecting plate. The connecting plate is provided with a circular hole, and the length limit rod passes through the circular hole of the connecting plate. After the hoop structures are aligned, they can be connected by bolts or fixed by binding tape.

[0035] Example 4

[0036] Different from Example 3, the expansion stop ring 4 is a flexible and elastic expansion stop ring, such as a binding belt or a rubber rope. The expansion stop ring 4 is passed around the outside of the length limiting rod 3 and sleeved on the outside of the corrugated hose to achieve the expansion-stopping effect.

[0037] This embodiment is only a further explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An explosion-proof expansion joint pipe, characterized in that: It includes a corrugated hose, flange joints connected to the two ends of the corrugated hose, a length limiting rod connected between the flange joints, and an expansion ring sleeved on the corrugated section of the corrugated hose that is recessed outside the corrugated section; at least two of the length limiting rods are located on the outside of the corrugated hose and are arranged along the length direction of the corrugated hose; and both ends of the length limiting rod are respectively provided with a limit piece to prevent the distance between the flange ends from changing.

2. The explosion-proof expansion joint pipe according to claim 1, characterized in that: The limiting piece is a limiting block, which is provided with a first mounting hole and a second mounting hole. The end of the length limiting rod is provided with an external thread and passes through the first mounting hole. Locking nuts that are matched with the external thread of the length limiting rod are respectively provided on both sides of the first mounting hole; a connecting bolt for connecting the limiting block to the bolt mounting hole of the flange joint is passed through the second mounting hole.

3. The explosion-proof expansion joint pipe according to claim 1, characterized in that: The limiting part includes two separate limiting plates, each of which is provided with a third mounting hole. The end of the length limiting rod is provided with an external thread and passes through the third mounting holes of the two limiting plates at the same time. A locking nut is provided for each limiting plate and cooperates with the external thread of the limiting rod. The locking nut clamps the two limiting plates from both sides to form a clamping space between the two limiting plates, and the clamping space is clamped at the edge of the flange end of the flange joint.

4. The explosion-proof expansion joint pipe according to claim 2, characterized in that: The limit block is provided with two second mounting holes, which are distributed in a triangular shape with the first mounting holes, and are distributed in an arc shape between the second mounting holes and correspond to two adjacent or spaced bolt mounting holes on the flange end.

5. An explosion-proof expansion joint pipe according to claim 2 or 3, characterized in that: The expansion stop ring is separated from the length limiting rod.

6. The explosion-proof expansion joint pipe according to claim 2 or 3, characterized in that: The expansion stop ring is connected to the length limiting rod.

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