A bypass device for axial clearance of a pipe end
By designing a bypass device for the axial gap at the pipe opening, the problem of bypassing the pipeline at the location of the thin isolation valve of the large heat exchanger was solved, realizing the stable connection of the cleaning equipment and efficient cleaning, and avoiding mechanical damage.
Patent Information
- Application Number
- CN202522361553.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-07
AI Technical Summary
In the existing technology, it is difficult to achieve pipeline bypass connection for the removal location of the thin isolation valve of large heat exchangers, which makes it difficult to connect the cleaning equipment, requires a large amount of operation, and is prone to mechanical damage to the original pipeline system.
Design a bypass device for axial clearance at pipe openings, including a flange plug, a diverter pipe, and a manifold pipe. The flange plug is connected to the target pipe flange, and the diverter pipe is used to achieve axial blocking and bypass. The arrangement of the diverter pipe reduces space occupation, ensures secure installation of flange bolts, and the connection between the diverter pipe and the manifold pipe ensures fluid flow efficiency.
This technology enables pipeline bypass at the location where the thin isolation valve is removed, reducing the amount of operation required, avoiding mechanical damage to the original pipeline, and ensuring smooth connection of the cleaning equipment and efficient cleaning.
Smart Images
Figure CN224932346U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline bypass connections, specifically, to a bypass device for use at the axial gap of a pipe opening. Background Technology
[0002] Heat exchangers, as key equipment for heat exchange in industrial fields such as nuclear power, thermal power, urban heating, and chemical industry, primarily function to cool high-temperature media systems with cooling water, thereby ensuring the continuous, stable, and efficient operation of the equipment. Maintaining the cleanliness of the heat exchanger's internal components helps reduce temperature differences, improve heat transfer efficiency, reduce system energy consumption, and further save plant electricity, ultimately ensuring the safe and reliable operation of the entire cooling system. Currently, common cleaning methods mainly include traditional manual cleaning and electromagnetic pulse cleaning. Manual cleaning requires a large investment of manpower, involving a certain degree of disassembly of the heat exchange mechanism for cleaning. This is not only labor-intensive and inefficient but also prone to water pollution and equipment damage. In contrast, electromagnetic pulse cleaning technology can achieve efficient cleaning without disassembling the heat exchanger, gradually becoming a more environmentally friendly and economical cleaning option.
[0003] However, cleaning operations on large heat exchangers often face unique structural limitations due to the inlet and outlet water pipes. These heat exchangers typically have large inlet and outlet pipe diameters, often reaching DN500 or even higher, and often include thin-film isolation valves. Because the valves themselves are compact, the available axial space between the two pipe sections after removal is extremely limited, making it difficult to directly connect conventional cleaning equipment. If the entire inlet and outlet pipes are removed, the operation is extensive, time-consuming, and prone to causing unnecessary mechanical damage to the existing piping system.
[0004] Therefore, there is currently no device available for bypassing and connecting pipes at the location where the thin isolation valve is removed, making it difficult to connect cleaning equipment to this type of heat exchanger.
[0005] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content
[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a bypass device for axial gaps at pipe openings. The bypass device can be installed within the axial gap at the target pipe opening that needs to be bypassed, thereby achieving bypass at the target pipe opening.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: it includes a flange plug, a diversion pipe, and a collection pipe. The flange plug includes a flange and a sealing head. The sealing head is disposed on the flange. The two ends of the diversion pipe are respectively connected to the sealing head and the collection pipe. At least two diversion pipes are provided between the sealing head and the collection pipe.
[0008] In this application, the flange of the flange plug is used to connect with the flange of the target pipe port that needs to be bypassed. The sealing head of the flange plug is used to axially seal the target pipe port. Bypass is achieved from the flange plug to the manifold through the diversion pipe. By setting at least two diversion pipes between the sealing head and the manifold, the diameter of the diversion pipes can be significantly reduced while having sufficient flow, so that the diversion pipes can be accommodated in the axial gap of the target pipe port that needs to be bypassed. Therefore, the bypass device of this application can be installed in the axial gap of the target pipe port that needs to be bypassed to achieve bypass at the target pipe port.
[0009] Based on the above, the diversion pipe is connected to the side wall of the sealing head, and the diversion pipe extends outward from the outer periphery of the flange plug in a direction perpendicular to the axis of the sealing head.
[0010] By adjusting the arrangement of the connecting pipes between the diversion pipe and the plug, the axial space occupied by the diversion pipe at the target pipe opening that needs to be bypassed is reduced.
[0011] Based on the above, a gap is left between the diversion pipes to avoid the flange bolt holes.
[0012] By leaving a gap, the distribution pipe will not affect the bolt installation of the flange and the pipe flange, ensuring that the flange can be securely installed on the pipe flange.
[0013] Based on the above, the diversion pipe includes at least one straight pipe section, the first straight pipe section of the diversion pipe extends from the plug head outward from the flange, and the first straight pipe section is arranged in the radial direction of the flange.
[0014] By using the first straight section of the diversion pipe, the positional distribution of the diversion pipe on the sealing flange is improved, ensuring sufficient spacing between the first straight pipe sections to avoid the installation space of the flange bolt holes. At the same time, it enables more efficient diversion / merging when the first straight pipe section and the sealing cover flow together, avoiding mutual interference between the fluids flowing between the first straight pipe sections.
[0015] Based on the above, the spacing angle between adjacent first straight pipe sections is a positive integer multiple of the spacing angle between adjacent bolt holes of the flange, and the first straight pipe section is located between two bolt holes of the flange or covers the bolt holes of the flange.
[0016] By setting the spacing angle of the first straight pipe section, it can be matched with the spacing angle of the flange bolt holes, thereby effectively avoiding the installation space of the flange bolts. This allows the distribution pipes to be arranged in accordance with the principle of not affecting the installation of the flange bolts, which is conducive to the stability of the flange installation.
[0017] Based on the above, the diversion pipe further includes a second straight pipe section, and an elbow is provided between the first straight pipe section and the second straight pipe section to connect the second straight pipe section to the collection pipe after changing the angle.
[0018] The second straight pipe section and the elbow enable the first straight pipe section, which is radially distributed along the flange, to be smoothly connected to the manifold.
[0019] Based on the above, the sealing head adopts a butterfly-shaped plug, and the end of the diversion pipe is provided with a bent pipe joint connected to the sealing head.
[0020] The bend in the pipe joint can also effectively redirect the fluid, preventing interference between the fluids entering the sealing head from the branch pipe, thus avoiding affecting the branching / merging efficiency.
[0021] Based on the above, the sum of the flow rates of the branch pipes is greater than or equal to the flow rate of the collection pipe.
[0022] This avoids interfering with the flow of fluid.
[0023] Based on the above, both ends of the manifold are provided with an enlarged diameter section extending from the port to the pipe body.
[0024] This ensures that the fluid flow rate remains unaffected.
[0025] Based on the above, both ends of the manifold are provided with flange openings, and the flange openings can be connected to flange plugs.
[0026] In this way, the flange opening at one end of the manifold can be flexibly selected and the other end sealed according to the actual site conditions.
[0027] This utility model has substantial features and progress compared to the prior art. Specifically, the sealing device of this application completes the connection with the flange of the target pipe port that needs to be bypassed through the flange of the flange plug, completes the axial sealing of the target pipe port through the sealing head of the flange plug, and achieves bypass from the flange plug to the manifold through at least two diversion pipes while ensuring the flow rate. It can make pipeline bypass connection at the location where the thin isolation valve is removed to clean the heat exchange equipment. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 yes Figure 1A schematic diagram of the cross section along line AA; In the figure, the attached labels are: flange plug 1, branch pipe 2, manifold 3, flange 11, sealing head 12, first straight pipe section 21, second straight pipe section 22, elbow 23, bend joint 24, expansion section 31, flange plug 32. Detailed Implementation
[0029] The technical solution of this utility model will be further described in detail below through specific embodiments.
[0030] Example 1 like Figure 1 , Figure 2 As shown, the bypass device for the axial gap of the pipe opening in this embodiment includes a flange plug 1, a diverter pipe 2, and a manifold pipe 3. The flange plug 1 is used to connect the flange at the target pipe opening that needs to be bypassed. The diverter pipe 2 is used to connect the flange plug 1 and the manifold pipe 3. The manifold pipe 3 can be used to connect, for example, the inlet and outlet water pipes of a cleaning device, so that the target pipe opening can be bypassed.
[0031] The flange plug 1, the diversion pipe 2, and the manifold 3 together serve as a bypass device in this application. They can be installed, for example, between the narrow axial mating gap between the flanges of the two pipes after the removal of the thin isolation valve, so that the cleaning equipment can connect the inlet and outlet water pipes of the heat exchanger through the bypass device, thereby enabling the cleaning equipment to complete the cleaning operation of the heat exchanger.
[0032] Specifically, the flange plug 1 includes a flange 11 and a plug 12. The flange 11 is consistent with the specifications of the flange of the target pipe port that needs to be bypassed. The plug 12 is installed on the flange 11 as a plugging mechanism at the target pipe port that needs to be bypassed. The plug 12 also serves as a confluence or diversion mechanism for the diversion pipe 2, connecting at least two diversion pipes 2.
[0033] Therefore, in this embodiment, firstly, the plugging head 12 and the flange 11 are placed together into the axial gap of the target pipe opening that needs to be bypassed, thereby blocking the target pipe opening; secondly, the plugging head 12 uses the diversion pipe 2 to converge or divert the water flow, thereby bypassing the target pipe opening.
[0034] Specifically, the two ends of the diversion pipe 2 are connected to the plug head 12 and the manifold 3 respectively. At least two diversion pipes 2 are provided between the plug head 12 and the manifold 3. Setting the diversion pipes 2 to at least two can significantly reduce the diameter of the diversion pipes 2 while ensuring the flow rate of the pipeline, so that the diversion pipes 2 can be accommodated in the axial gap at the target pipe opening that needs to be bypassed, so as to achieve bypass.
[0035] In the process of achieving bypass, the plug head 12 and the manifold 3 can each serve as a confluence or diversion mechanism at both ends of the diversion pipe 2: for example, the water flow is diverted from the manifold 3 to the diversion pipe 2 and then converges in the plug head 12; or for example, the water flow is diverted from the plug head 12 to the diversion pipe 2 and then converges in the manifold 3.
[0036] In this application, the flange 11 of the flange plug 1 is used to connect with the flange of the target pipe port that needs to be bypassed, and the sealing head 12 of the flange plug 1 is used to axially seal the target pipe port. The bypass from the flange plug 1 to the manifold 3 is achieved through the diversion pipe 2. By setting at least two diversion pipes 2 between the sealing head 12 and the manifold 3, the diameter of the diversion pipes 2 can be significantly reduced while having sufficient flow, so that the diversion pipes 2 can be accommodated in the axial gap of the target pipe port that needs to be bypassed. Therefore, the bypass device of this application can be installed in the axial gap of the target pipe port that needs to be bypassed to achieve bypass at the target pipe port.
[0037] Example 2 Based on Embodiment 1, the diversion pipe 2 is connected to the side wall of the sealing head 12, and the diversion pipe 2 extends outward from the outer periphery of the flange plug 1 in a direction perpendicular to the axis of the sealing head 12.
[0038] Specifically, the connection point between the diversion pipe 2 and the sealing head 12 is located on the side wall between the top and bottom ends of the sealing head 12. At the same time, the diversion pipe 2 extends outward from the outer periphery of the flange plug 1 in a direction perpendicular to the axis of the sealing head 12. Therefore, the diversion pipe 2 will not occupy too much space in the axial gap at the target pipe opening that needs to be bypassed, and the bypass device of this embodiment can be successfully installed in the axial gap at the target pipe opening.
[0039] It is worth mentioning that the top and bottom ends of the sealing head 12 refer to the following respectively: the bottom end of the sealing head 12 refers to its bottom end face, and the top end of the sealing head 12 refers to its top end face when the sealing head 12 is square, and to its top vertex when the sealing head 12 is arc-shaped.
[0040] Furthermore, the body of the diversion pipe 2 is located between the top and bottom ends of the plug head 12, which can further reduce the space occupied.
[0041] This embodiment reduces the axial space occupied by the diversion pipe 2 at the target pipe opening that needs to be bypassed by arranging the connecting pipe between the diversion pipe 2 and the plug head 12.
[0042] Example 3 Based on Embodiment 1 or Embodiment 2, a gap is left between the diversion pipes 2 to avoid the bolt holes of the flange 11.
[0043] Since the diversion pipe 2 may block the installation space of the flange bolts when it is led out from the target pipe opening, a gap is reserved so that the diversion pipe 2 will not affect the bolt installation of the flange 11 and the pipe opening flange, ensuring that the flange 11 can be firmly installed on the pipe opening flange.
[0044] Example 4 Based on embodiment 3, the diversion pipe 2 includes at least one straight pipe section. The first straight pipe section 21 of the diversion pipe 2 extends from the plug head 12 outward from the flange 11, and the first straight pipe section 21 is arranged in the radial direction of the flange 11.
[0045] The first straight pipe section 21 of the diversion pipe 2 improves the positional distribution of the diversion pipe 2 on the sealing flange 1, so that there is sufficient spacing between the first straight pipe sections 21 (i.e., the gap in embodiment 3) to avoid the installation space of the bolt holes of the flange 11. At the same time, it makes the diversion / merging efficiency more efficient when the first straight pipe section 21 and the sealing cover 12 flow to each other, and avoids the mutual interference of the fluids flowing between the first straight pipe sections 21.
[0046] Example 5 Based on embodiment 4, the spacing angle α between adjacent first straight pipe sections 21 is a positive integer multiple of the spacing angle b between adjacent bolt holes of flange 11. The first straight pipe section 21 is located between two bolt holes of flange 11, or the first straight pipe section 21 covers the bolt holes of flange 11.
[0047] For example, when a=b, the first straight pipe section 21 can be placed between the two bolt holes of the flange 11, so that the bolt holes of the flange 11 and the first straight pipe section 21 are spaced apart. This is suitable for situations where the diameter of the first straight pipe section 21 is small and can be located between two adjacent bolt holes.
[0048] For example, when a=2b, the first straight pipe section 21 can be placed over the bolt holes of the flange 11, such as... Figure 1 As shown, this allows for the installation of a bolt hole between two adjacent first straight pipe sections 21. This is suitable for situations where the diameter of the first straight pipe section 21 is large and it is impossible to leave a bolt installation gap between the two bolt holes.
[0049] The case where a = 3b or a higher multiple is similar to the case described above and will not be repeated here.
[0050] By setting the spacing angle of the first straight pipe section 21, it can be matched with the spacing angle of the bolt holes of the flange 11, thereby effectively avoiding the installation space of the flange bolts. This allows the diversion pipe 2 to be arranged in accordance with the principle of not affecting the installation of the flange bolts, which is conducive to the stable installation of the flange 11.
[0051] Example 6 Based on Example 4 or Example 5, such as Figure 1 As shown, a portion of the branch pipe 2 also includes a second straight pipe section 22. An elbow 23 is provided between the first straight pipe section 21 and the second straight pipe section 22 to connect the second straight pipe section 22 to the collecting pipe 3 after changing the angle.
[0052] The other part of the branch pipe 2 can be directly connected to the collecting pipe 3 through the first straight pipe section 22, so there is no need to install the second straight pipe section 22 and the elbow 23.
[0053] The first straight pipe section 21, which is radially distributed along the flange 11, can be smoothly connected to the manifold 3 via the second straight pipe section 22 and the elbow 23.
[0054] In other embodiments different from this embodiment, the manifold 3 can be configured as an arc-shaped bend, so that the first straight pipe section 21 can be effectively connected to the manifold 3 without the need to set up a second straight pipe section 22 and an elbow 23.
[0055] Example 7 Based on the above embodiments, the plug head 12 adopts a butterfly plug, which can further reduce the axial space occupied by the plug head 12; moreover, the end of the diversion pipe 2 is provided with a bend joint 24 connected to the plug head 12. The bend joint 24 allows an approximately circular opening to be made on the plug head 12, thus effectively making a stable connection between the diversion pipe 2 and the plug head 12; the bend joint 24 can also effectively turn the fluid, avoiding mutual interference between the fluids entering the plug head 12 from the diversion pipe 2, thereby avoiding affecting the diversion / merging efficiency.
[0056] Example 8 Based on the above embodiments, the sum of the flow rates of the branch pipes 2 is greater than or equal to the flow rate of the collecting pipe 3, ensuring that the flow rate after branching is greater than or equal to the flow rate of the collecting pipe 3, thus avoiding interference with the flow of fluid.
[0057] Example 9 Based on the above embodiments, the manifold 3 has an expansion section 31 at both ends from the port to the pipe body, which can ensure that the fluid flow rate is not affected.
[0058] Example 10 Based on the above embodiments, both ends of the manifold 3 are provided with flange openings, which can be connected to flange plugs 32. The flange opening at one end of the manifold 3 can be flexibly selected and the other end sealed according to the actual site conditions.
[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.
Claims
1. A bypass device for axial clearance at pipe openings, characterized in that, It includes a flange plug (1), a diversion pipe (2) and a manifold (3). The flange plug (1) includes a flange (11) and a sealing head (12). The sealing head (12) is disposed on the flange (11). The two ends of the diversion pipe (2) are respectively connected to the sealing head (12) and the manifold (3). At least two diversion pipes (2) are provided between the sealing head (12) and the manifold (3).
2. The bypass device for the axial gap of the pipe opening according to claim 1, characterized in that, The diversion pipe (2) is connected to the side wall of the sealing head (12), and the diversion pipe (2) extends outward from the outer periphery of the flange plug (1) in a direction perpendicular to the axis of the sealing head (12).
3. The bypass device for the axial gap of the pipe opening according to claim 2, characterized in that, A gap is left between the diverter pipes (2) to avoid the bolt holes of the flange (11).
4. The bypass device for the axial clearance of a pipe opening according to claim 3, characterized in that, The diversion pipe (2) includes at least one straight pipe section, the first straight pipe section (21) of the diversion pipe (2) extends from the plug head (12) outward from the flange (11), and the first straight pipe section (21) is arranged in the radial direction of the flange (11).
5. The bypass device for the axial gap of the pipe opening according to claim 4, characterized in that, The angle between adjacent first straight pipe sections (21) is a positive integer multiple of the angle between adjacent bolt holes of the flange (11). The first straight pipe section (21) is located between two bolt holes of the flange (11) or covers the bolt holes of the flange (11).
6. The bypass device for the axial clearance of a pipe opening according to claim 4, characterized in that, The diversion pipe also includes a second straight pipe section (22), and an elbow (23) is provided between the first straight pipe section (21) and the second straight pipe section (22) to connect the second straight pipe section (22) to the collection pipe (3) after changing the angle.
7. The bypass device for the axial clearance of a pipe nozzle according to any one of claims 1-6, characterized in that, The plug (12) is a butterfly plug, and the end of the diversion pipe (2) is provided with a bend joint (24) connected to the plug (12).
8. The bypass device for the axial clearance of a pipe nozzle according to any one of claims 1-6, characterized in that, The sum of the flow rates of the branch pipes (2) is greater than or equal to the flow rate of the collection pipe (3).
9. The bypass device for the axial clearance of a pipe opening according to claim 8, characterized in that, The manifold (3) has an enlarged diameter section (31) at both ends, extending from the port to the pipe body.
10. The bypass device for the axial clearance of a pipe opening according to claim 1, characterized in that, Both ends of the manifold (3) are provided with flange openings, and the flange openings can be connected to flange plugs (32).