Composite flexible compensation device

Abstract

This invention provides a composite flexible compensation device, relating to the field of pipeline equipment technology. It includes: a first flange, a second flange, a metal bellows, a rubber connecting pipe, a pumping mechanism, and a transmission pipeline. The metal bellows and the rubber connecting pipe are coaxially sleeved. Both ends of the metal bellows are sealed to the first and second flanges, respectively, and both ends of the rubber connecting pipe are also sealed to the first and second flanges, respectively. A receiving space is formed between the metal bellows and the rubber connecting pipe. The pumping mechanism is connected to this receiving space via the transmission pipeline, and the pumping mechanism can pump the pressure medium into the receiving space. This device can fully utilize the advantages of both the metal bellows and the rubber connecting pipe, achieving pressure compensation in high-pressure fluctuating pipeline systems, and has a wide range of applications. Moreover, the metal bellows and the rubber connecting pipe can cooperate to withstand pressure, effectively extending service life, reducing maintenance frequency, and exhibiting good economic efficiency.

Description

Technical Field

[0001] This invention relates to the field of pipeline equipment technology, and in particular to a composite flexible compensation device. Background Technology

[0002] In industrial systems, pipeline structures are typically installed when materials such as steam, water, and oil need to be transported. However, in practical applications, due to factors such as thermal expansion and foundation settlement, flexible compensation devices are often required in pipeline equipment to compensate for pipeline deformation. Moreover, in certain specific situations, installing flexible compensation devices in pipeline equipment can also reduce and isolate vibrations.

[0003] Currently, flexible compensation devices used in the industrial sector mainly include metal bellows and rubber hoses. Among them, rubber hoses have good stability and long service life under alternating loads, but their pressure resistance and safety reliability are poor. Metal bellows have strong pressure-bearing capacity, but they are prone to fatigue failure under alternating internal pressure. For high-pressure systems with changing internal pressure, existing flexible compensation devices are insufficient to meet normal operating requirements. Summary of the Invention

[0004] This invention provides a composite flexible compensation device to solve the shortcomings of existing flexible compensation devices that are difficult to meet normal use requirements when facing high-pressure and internally variable pipeline systems.

[0005] This invention provides a composite flexible compensation device, comprising: a first flange, a second flange, a metal bellows, a rubber connecting pipe, a pumping mechanism, and a transmission pipeline.

[0006] The metal bellows and the rubber connecting pipe are coaxially sleeved. The two ends of the metal bellows along its length are respectively sealed to the first flange and the second flange. The two ends of the rubber connecting pipe along its length are respectively sealed to the first flange and the second flange. A receiving space is formed between the metal bellows and the rubber connecting pipe. The pumping mechanism is connected to the receiving space via the transmission pipe. The pumping mechanism is capable of pumping the pressure medium into the receiving space.

[0007] According to a composite flexible compensation device provided by the present invention, the rubber connecting tube is sleeved on the outside of the metal corrugated pipe.

[0008] According to the present invention, a composite flexible compensation device is provided, wherein the metal corrugated pipe is sleeved on the outside of the rubber connecting pipe.

[0009] According to the present invention, a composite flexible compensation device is provided, wherein the pressure medium is pure water.

[0010] According to a composite flexible compensation device provided by the present invention, a first metal transition ring is provided on the side of the first flange facing the second flange, and a second metal transition ring is provided on the side of the second flange facing the first flange. The two ends of the metal bellows are respectively sealed and connected to the first metal transition ring and the second metal transition ring.

[0011] According to a composite flexible compensation device provided by the present invention, a first rubber connecting ring is provided on the side of the first flange facing the second flange, and a second rubber connecting ring is provided on the side of the second flange facing the first flange. The two ends of the rubber connecting pipe are respectively sealed and connected to the first rubber connecting ring and the second rubber connecting ring.

[0012] According to a composite flexible compensation device provided by the present invention, the first flange is provided with a connecting hole, one end of the connecting hole is located between the metal bellows and the rubber connecting pipe and communicates with the receiving space, the other end of the connecting hole is located on the outer peripheral wall of the first flange, and the transmission pipe is connected to the other end of the connecting hole.

[0013] According to a composite flexible compensation device provided by the present invention, the connecting hole includes a horizontal hole and a vertical hole. The horizontal hole is disposed on the end face of the first flange facing the second flange and extends along the thickness direction of the first flange. One end of the horizontal hole is open and connected to the receiving space. The vertical hole is disposed on the outer wall surface of the first flange and extends inward along the radial direction of the first flange. One end of the vertical hole is open and connected to the transmission pipe. The other end of the vertical hole and the other end of the horizontal hole are connected inside the first flange.

[0014] According to a composite flexible compensation device provided by the present invention, the rubber connecting pipe is provided with a plurality of annular flanges extending in its circumferential direction, and the plurality of annular flanges are arranged at intervals along the length direction of the rubber connecting pipe.

[0015] According to a composite flexible compensation device provided by the present invention, the outer wall of the first flange is provided with a first flange structure extending outward along its radial direction, the first flange structure is provided along the circumferential direction of the first flange, and the first flange structure is provided with a mounting hole penetrating along the length direction of the first flange.

[0016] The outer wall of the second flange is provided with a second flange structure extending outward in its radial direction. The second flange structure extends in the circumferential direction of the second flange and is provided with a mounting hole that passes through the second flange in the length direction.

[0017] The composite flexible compensation device provided by this invention includes: a first flange, a second flange, a metal bellows, a rubber connecting pipe, a pumping mechanism, and a transmission pipeline. This device can fully utilize the advantages of both the metal bellows and the rubber connecting pipe, achieving pressure compensation in high-pressure fluctuating pipeline systems and having a wide range of applications. Furthermore, the metal bellows and the rubber connecting pipe can work together to withstand pressure, effectively extending service life, reducing maintenance frequency, and offering good economic benefits. In addition, when one of the metal bellows or the rubber connecting pipe is damaged, the other can still provide a seal, preventing the leakage of hazardous substances for a short period of time, thus providing higher safety. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a composite flexible compensation device according to one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a composite flexible compensation device according to another embodiment of the present invention.

[0021] Figure label:

[0022] 1. First flange; 2. Second flange; 3. Metal bellows; 4. Rubber connecting pipe; 5. Pumping mechanism; 6. Transmission pipeline; 7. First metal transition ring; 8. Second metal transition ring; 9. First rubber connecting ring; 10. Second rubber connecting ring; 11. Connecting hole; 12. First flange structure; 13. Second flange structure. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] In one embodiment of the present invention, a composite flexible compensation device is provided. This device can be installed in a pipeline system and can fully utilize the advantages of both rubber and metal corrugated pipes, making it particularly suitable for pipeline systems under high-pressure and variable-load conditions. The following is in conjunction with... Figure 1 and Figure 2 The composite flexible compensation device in this embodiment is further described in the illustration.

[0025] Specifically, such as Figure 1 As shown, the composite flexible compensation device in this embodiment includes: a first flange 1, a second flange 2, a metal bellows 3, a rubber connecting pipe 4, a pumping mechanism 5, and a transmission pipeline 6.

[0026] The metal bellows 3 and the rubber connecting pipe 4 are coaxially sleeved. The two ends of the metal bellows 3 along its length are respectively sealed to the first flange 1 and the second flange 2. The two ends of the rubber connecting pipe 4 along its length are respectively sealed to the first flange 1 and the second flange 2. A receiving space is formed between the metal bellows 3 and the rubber connecting pipe 4. The pumping mechanism 5 is connected to the receiving space through the transmission pipe 6. The pumping mechanism 5 can pump the pressure medium to the receiving space.

[0027] For example, both the first flange 1 and the second flange 2 can be constructed of metallic materials. The first flange 1 and the second flange 2 can be constructed as a tubular structure with a certain length or a plate-like structure with a certain thickness and through holes, and the outer end faces of the first flange 1 and the second flange 2 that are far apart from each other can be connected to a pipeline.

[0028] The metal bellows 3 can be made of materials such as carbon steel or stainless steel, and the metal bellows 3 is constructed as a pipe with a regular wave-like shape. In this embodiment, the two ends of the metal bellows 3 along its length are respectively sealed and connected to the first flange 1 and the second flange 2, for example, by welding.

[0029] The rubber connecting pipe 4 can be made of materials such as rubber, and is coaxially sleeved on the inner or outer side of the metal bellows 3. In this embodiment, the two ends of the rubber connecting pipe 4 along its length are respectively sealed to the first flange 1 and the second flange 2, for example, by means of vulcanization.

[0030] There is a gap between the metal bellows 3 and the rubber connecting pipe 4, which is the receiving space. Moreover, the two ends of the receiving space can form a sealed space under the closure of the first flange and the second flange.

[0031] Furthermore, in this embodiment, the pumping mechanism 5 is connected to the receiving space via the transmission pipe 6. The pumping mechanism 5 can pump the pressure medium into the receiving space via the transmission pipe 6, and the pressure in the receiving space can be controlled by means of the pressure medium.

[0032] In practical applications, the composite flexible compensation device can be installed in a high-pressure system pipeline with varying internal pressure using the first flange 1 and the second flange 2. Then, the pressure in the system pipeline is obtained using a pressure sensor, and the corresponding pressure value is transmitted to the pumping mechanism 5. The pumping mechanism 5 can then pump the pressure medium into the receiving space according to the pressure value, thereby regulating the pressure in the receiving space.

[0033] In a specific embodiment, such as Figure 1 As shown, when the metal bellows 3 is located inside the rubber connecting pipe 4, if the pressure inside the system pipeline is P1 and the design pressure of the metal bellows 3 is P0, the pumping mechanism 5 can pump the pressure medium into the receiving space at a pressure value of P2, and control P2 to be equal to P1-P0. Moreover, when the pressure sensor in the system pipeline detects a change in P1, the pressure P2 provided by the pumping mechanism 5 also changes accordingly.

[0034] In this way, the pressure difference between the inside and outside of the metal bellows 3 can always be maintained at the design pressure P0, thereby preventing fatigue damage to the metal bellows 3 and improving its service life. Moreover, most of the pressure applied by the system pipeline is borne by the metal bellows 3, and the outermost rubber connecting pipe 4 is only used to bear the pressure of the pressure medium and the fluctuation pressure of the system pipeline. The overall pressure bearing level will not be too high, and it also has a sufficient service life.

[0035] In yet another specific embodiment, such as Figure 2 As shown, when the metal bellows 3 is located outside the rubber connecting pipe 4, if the pressure inside the system pipeline is P1, the pumping mechanism 5 can pump the pressure medium into the receiving space at a pressure value of P2, and control P2 to be equal to P1. If the design pressure of the metal bellows 3 is P0, when the pressure P1 inside the system pipeline reaches or exceeds the design pressure P0 of the outer metal bellows 3, the pumping mechanism 5 can pump the pressure value P2 to be equal to P0, thus allowing the pressure fluctuation inside the system pipeline to be borne by the rubber connecting pipe.

[0036] This method maintains pressure balance between the inner and outer sides of the rubber connecting pipe 4, which can improve the service life of the rubber connecting pipe 4. Moreover, when there are large pressure fluctuations inside the system pipeline, the rubber connecting pipe 4 and the outermost metal bellows 3 can share the pressure and compensate for it, thus also having a sufficient service life.

[0037] Therefore, the composite flexible compensation device in this embodiment can fully leverage the advantages of both the metal bellows 3 and the rubber connecting pipe 4, enabling pressure compensation in high-pressure fluctuating pipeline systems and providing a wide range of applications. Furthermore, the metal bellows 3 and the rubber connecting pipe 4 can work together to withstand pressure, effectively extending their service life and reducing maintenance frequency, resulting in good economic efficiency. In addition, when one of the metal bellows 3 or the rubber connecting pipe 4 is damaged, the other can still provide a seal, preventing the leakage of hazardous substances for a short period, thus offering enhanced safety.

[0038] In one embodiment, when it is necessary to transport a substance that does not readily react with metals, such as oil, as... Figure 1 As shown, the rubber connecting tube 4 can be sleeved on the outside of the metal corrugated tube 3.

[0039] In yet another embodiment, when it is necessary to transport a substance that does not readily react with rubber, such as water, as... Figure 2 As shown, the metal corrugated pipe 3 can be sleeved on the outside of the rubber connecting pipe 4.

[0040] In this embodiment, since the pressure medium in the containment space needs to be in contact with both the metal bellows 3 and the rubber connecting pipe 4 at the same time, pure water can be used as the pressure medium to avoid the pressure medium reacting with both of them.

[0041] In this embodiment, in order to ensure that the metal bellows 3 can be effectively connected to the first flange 1 and the second flange 2, such as Figure 1 As shown, a first metal transition ring 7 is provided on the side of the first flange 1 facing the second flange 2, and a second metal transition ring 8 is provided on the side of the second flange 2 facing the first flange 1. The two ends of the metal bellows 3 are respectively sealed and connected to the first metal transition ring 7 and the second metal transition ring 8.

[0042] For example, one side of the first flange 1 along its length is used to connect to an external pipeline, and the other side is provided with a first metal transition ring 7, which can be integrally formed on the first flange 1. Then, one end of the metal bellows 3 is sealed to the first metal transition ring 7 by welding.

[0043] Similarly, one side of the second flange 2 along its length is used to connect to an external pipeline, and the other side is provided with a second metal transition ring 8, which can be integrally formed on the second flange 2. Then, the other end of the metal bellows 3 is welded to the second metal transition ring 8 for a sealed connection.

[0044] Accordingly, in order to ensure that the rubber connecting pipe 4 can be effectively connected to the first flange 1 and the second flange 2, such as Figure 1 As shown, a first rubber connecting ring 9 is provided on the side of the first flange 1 facing the second flange 2, and a second rubber connecting ring 10 is provided on the side of the second flange 2 facing the first flange 1. The two ends of the rubber connecting pipe 4 are respectively sealed and connected to the first rubber connecting ring 9 and the second rubber connecting ring 10.

[0045] For example, one side of the first flange 1 along its length is used to connect to an external pipeline, and the other side is provided with a first rubber connecting ring 9, which can be integrally formed on the first flange 1. Then, one end of the rubber connecting pipe 4 is vulcanized to seal it to the first rubber connecting ring 9.

[0046] Similarly, one side of the second flange 2 along its length is used to connect to an external pipeline, and the other side is provided with a second rubber connecting ring 10, which can be integrally formed on the second flange. Then, the other end of the rubber connecting pipe 4 is vulcanized to seal and connect with the second rubber connecting ring 10.

[0047] like Figure 1 As shown, when the rubber connecting tube 4 is sleeved on the outside of the metal corrugated tube 3, the first rubber connecting ring 9 is set on the outside of the first metal transition ring 7, and the second rubber connecting ring 10 is set on the outside of the second metal transition ring 8.

[0048] Or, such as Figure 2 As shown, when the rubber connecting tube 4 is sleeved inside the metal corrugated tube 3, the first rubber connecting ring 9 is set inside the first metal transition ring 7, and the second rubber connecting ring 10 is set inside the second metal transition ring 8.

[0049] Furthermore, in order to ensure that the transmission pipe 6 is connected to the receiving space, the first flange 1 is provided with a connecting hole 11. One end of the connecting hole 11 is located between the metal bellows 3 and the rubber connecting pipe 4 and is connected to the receiving space. The other end of the connecting hole 11 is located on the outer peripheral wall of the first flange 1, and the transmission pipe 6 is connected to the other end of the connecting hole 11.

[0050] For example, such as Figure 1 As shown, the connecting hole 11 has a first opening and a second opening. The first opening is located between the first metal transition ring 7 and the first rubber connecting ring 9. The second opening is located on the outer peripheral wall of the first flange 1. The inner wall of the second opening is provided with a threaded structure, so that the transmission pipe 6 can be connected to the second opening by means of a threaded connection.

[0051] In one specific embodiment, the connecting hole 11 may include a horizontal hole and a vertical hole, such as... Figure 1As shown, a horizontal hole is provided on the end face of the first flange 1 facing the second flange 2 and extends along the thickness direction of the first flange 1. One end of the horizontal hole is open and connected to the receiving space. A vertical hole is provided on the outer wall surface of the first flange 1 and extends inward along the radial direction of the first flange 1. One end of the vertical hole is open and connected to the transmission pipe. The other end of the vertical hole and the other end of the horizontal hole are connected inside the first flange 1.

[0052] Therefore, when the connecting hole 11 is connected to the transmission pipe 6, the pressure medium in the transmission pipe 6 can fully enter the receiving space.

[0053] In this embodiment, the rubber connecting pipe 4 is provided with a plurality of annular flanges extending in its circumferential direction, and the plurality of annular flanges are arranged at intervals along the length direction of the rubber connecting pipe 4.

[0054] By adopting the above configuration, it can be ensured that the rubber connecting pipe 4 can effectively undergo elastic deformation and has sufficient structural strength.

[0055] In addition, both the first flange 1 and the second flange 2 can be connected to external pipelines by means of bolts.

[0056] As one implementation method, such as Figure 1 and Figure 2 As shown, the outer wall of the first flange 1 is provided with a first flange structure 12 extending outward along its radial direction. The first flange structure 12 extends along the circumferential direction of the first flange 1 and is provided with a mounting hole that passes through along the length direction of the first flange 1.

[0057] Therefore, in practical use, when it is necessary to connect the first flange 1 to an external pipe, the bolts can pass through the mounting holes on the first flange structure 12 and engage with the external pipe.

[0058] Similarly, the outer wall of the second flange 2 is provided with a second flange structure 13 extending outward in its radial direction. The second flange structure 13 extends in the circumferential direction of the second flange 2 and is provided with a mounting hole that passes through the second flange 2 in the length direction.

[0059] Therefore, in practical use, when it is necessary to connect the second flange 2 to an external pipe, the bolts can pass through the mounting holes on the second flange structure 13 and engage with the external pipe.

[0060] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite flexible compensation device, characterized in that, include: First flange, second flange, metal bellows, rubber connecting pipe, pumping mechanism, and transmission pipeline. The metal bellows and the rubber connecting pipe are coaxially sleeved. The two ends of the metal bellows along its length are respectively sealed to the first flange and the second flange. The two ends of the rubber connecting pipe along its length are respectively sealed to the first flange and the second flange. An accommodating space is formed between the metal bellows and the rubber connecting pipe. The pumping mechanism is connected to the accommodating space via the transmission pipe. The pumping mechanism is capable of pumping the pressure medium into the accommodating space. The first flange is provided with a connecting hole. One end of the connecting hole is located between the metal bellows and the rubber connecting pipe and connects to the receiving space. The other end of the connecting hole is located on the outer peripheral wall of the first flange, and the transmission pipe is connected to the other end of the connecting hole.

2. The composite flexible compensation device according to claim 1, characterized in that, The rubber connecting tube is sleeved on the outside of the metal corrugated pipe.

3. The composite flexible compensation device according to claim 1, characterized in that, The metal corrugated pipe is sleeved on the outside of the rubber connecting pipe.

4. The composite flexible compensation device according to claim 1, characterized in that, The pressure medium is pure water.

5. The composite flexible compensation device according to claim 1, characterized in that, A first metal transition ring is provided on the side of the first flange facing the second flange, and a second metal transition ring is provided on the side of the second flange facing the first flange. The two ends of the metal bellows are respectively sealed and connected to the first metal transition ring and the second metal transition ring.

6. The composite flexible compensation device according to claim 1, characterized in that, A first rubber connecting ring is provided on the side of the first flange facing the second flange, and a second rubber connecting ring is provided on the side of the second flange facing the first flange. The two ends of the rubber connecting pipe are respectively sealed and connected to the first rubber connecting ring and the second rubber connecting ring.

7. The composite flexible compensation device according to claim 1, characterized in that, The connecting hole includes a horizontal hole and a vertical hole. The horizontal hole is disposed on the end face of the first flange facing the second flange and extends along the thickness direction of the first flange. One end of the horizontal hole is open and connected to the receiving space. The vertical hole is disposed on the outer wall surface of the first flange and extends inward along the radial direction of the first flange. One end of the vertical hole is open and connected to the transmission pipe. The other end of the vertical hole and the other end of the horizontal hole are connected inside the first flange.

8. The composite flexible compensation device according to claim 1, characterized in that, The rubber connecting pipe is provided with a plurality of annular flanges extending in its circumferential direction, and the plurality of annular flanges are arranged at intervals along the length direction of the rubber connecting pipe.

9. The composite flexible compensation device according to claim 1, characterized in that, The outer wall of the first flange is provided with a first flange structure extending outward in its radial direction. The first flange structure extends in the circumferential direction of the first flange and is provided with a mounting hole that penetrates in the length direction of the first flange. The outer wall of the second flange is provided with a second flange structure extending outward in its radial direction. The second flange structure extends in the circumferential direction of the second flange and is provided with a mounting hole that passes through the second flange in the length direction.

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