Axial thermal elongation compensation interface for heat exchangers

Abstract

This utility model relates to the field of motor cooling technology and provides an axial thermal expansion compensation interface for a heat exchanger, including a corrugated cooling main pipe; a flow divider cone, which is riveted to the end inlet of the corrugated cooling main pipe by multiple reinforcing ribs welded to its periphery; a high thermal conductivity collar, which is movably connected to the outside of the corrugated cooling main pipe; a compensation extension pipe, which is connected to one end of the high thermal conductivity collar; and a base, which is disposed on one side of the compensation extension pipe and whose bottom is stably connected to the end of the compensation extension pipe by a quick connector; wherein, the length of the corrugated cooling main pipe covers the entire axial length of a single motor, and its structure is continuous and seamless, with three-dimensional corrugated microribs spun on the inner wall. This utility model, through the corrugated cooling main pipe and the high thermal conductivity collar, rapidly conducts local heat, guides the uniform flow of the medium, significantly reduces the temperature difference of hot spots in the motor, and improves the stability and lifespan of the motor.

Description

Technical Field

[0001] This utility model relates to the field of motor cooling technology, and in particular to an axial thermal elongation compensation interface for a heat exchanger. Background Technology

[0002] Effective heat dissipation is crucial for ensuring motor performance and lifespan during operation. Currently, the traditional "fin-fan" cooling system in the industry suffers from uneven airflow distribution and localized short circuits, leading to significant temperature differences in internal hot spots. These large temperature variations not only severely impact the lifespan of the motor's insulation components but also limit the increase in power density, making it difficult to meet the operational demands of high-performance motors.

[0003] To improve this situation, the current mainstream approach in the industry is to embed cooling water pipes inside the motor to achieve more direct heat dissipation. However, this cooling method still has many drawbacks in practical applications: First, the cooling pipes need to be welded in sections, resulting in a large number of welding points. This not only leads to high flow resistance in the pipes, affecting the flow efficiency of the cooling medium, but also poses a significant risk of leakage. Once a leak occurs, it will seriously affect the normal operation of the motor. Second, the contact area between the outer wall of the cooling water pipe and the heat source inside the motor is insufficient. Heat needs to be transferred to the cooling water pipe through multiple conduction paths, resulting in significant heat loss during this process. This leads to a large temperature difference between the cooling water pipe and the heat source, resulting in low heat dissipation efficiency. Third, the installation and maintenance of the cooling water pipes require disassembling the stator or rotor of the motor. The operation is complex and time-consuming, resulting in prolonged motor downtime and high downtime losses. Utility Model Content

[0004] The purpose of this invention is to solve the problems of large temperature differences in hot spots and high leakage risks, large heat dissipation temperature differences, and inconvenient installation and maintenance in the existing technology, as well as the existing solutions for embedding cooling water pipes inside motors.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an axial thermal expansion compensation interface for a heat exchanger, comprising a corrugated cooling main pipe; a flow divider cone, which is riveted to the end inlet of the corrugated cooling main pipe by multiple reinforcing ribs welded to its periphery; a high thermal conductivity collar, which is movably connected to the outside of the corrugated cooling main pipe; a compensation extension pipe, which is connected to one end of the high thermal conductivity collar; and a base, which is disposed on one side of the compensation extension pipe, and whose bottom is stably connected to the end of the compensation extension pipe by a quick connector; wherein, the length of the corrugated cooling main pipe covers the entire axial length of a single motor, and its structure is continuous and seamless, with three-dimensional corrugated microribs spun on the inner wall.

[0006] The technical effects of adopting the above-mentioned further solutions are as follows: the corrugated cooling main pipe achieves uniform heat exchange throughout the motor by covering the entire length and the micro-ribs on the inner wall; the flow divider cone and high thermal conductivity collar help to dissipate heat more efficiently; the compensation extension pipe and quick connector are adapted to axial thermal expansion; the frame connection is stable, the overall temperature difference of the motor is reduced, the leakage risk is reduced, and the stable operation of the motor is ensured.

[0007] In a preferred embodiment, the high thermal conductivity collar component includes: a high thermal conductivity collar, which is sleeved and installed on the outside of the corrugated cooling main pipe, and its outer contour matches the inner hole of the motor core slot or rotor retaining ring; wherein, the inner hole of the high thermal conductivity collar is interference-fitted with the outer wall of the corrugated cooling main pipe.

[0008] The technical effect of adopting the above-mentioned further solution is that the high thermal conductivity sleeve is fitted outside the corrugated cooling main pipe, and the inner hole is interference-fitted with the outer wall of the main pipe to fit tightly and conduct heat efficiently; its outer contour is adapted to the motor core slot or the inner hole of the rotor retaining ring, which can accurately connect with the motor components, quickly dissipate local high temperature, and help the main pipe achieve uniform heat exchange throughout the whole area.

[0009] In a preferred embodiment, the quick connector includes: a corrugated compensating tube, movably disposed at the upper end of the compensating extension tube; and two connecting frames riveted to both ends of the corrugated compensating tube; wherein the corrugated compensating tube is stably connected to the compensating extension tube through the connecting frames.

[0010] The technical effect of adopting the above-mentioned further solution is that the two connecting brackets are riveted to both ends of the corrugated compensation pipe, which helps to stably connect it with the compensation extension pipe and ensures the structural stability.

[0011] In a preferred embodiment, the quick connector further includes: a plurality of limiting screws, which are evenly arranged in a ring between the two connecting frames; and a positioning nut, which is movably connected to the end of the limiting screws; wherein the limiting screws and the positioning nut are connected by threads.

[0012] The technical effect of adopting the above-mentioned further solution is that the threaded engagement of the ring-shaped uniformly distributed limiting screws with the end positioning nuts can accurately adjust the distance between the two connecting frames, control the deformation amplitude of the corrugated compensation pipe, and avoid damage from excessive expansion and contraction.

[0013] In a preferred embodiment, the quick connector further includes: a lower connecting block riveted to the top of one of the connecting frames; and an upper connecting block movably mounted on the upper end of the lower connecting block; wherein the top of the upper connecting block is riveted to the bottom of the base, and the lower connecting block and the upper connecting block engage with each other.

[0014] The technical effect of adopting the above-mentioned further solution is that the lower connecting block is riveted to the top of a connecting frame, and the upper connecting block is movably engaged with its upper end and riveted to the bottom of the machine base. The engagement and cooperation enhance the connection accuracy between the machine base and the compensation extension tube.

[0015] In a preferred embodiment, the quick connector further includes: multiple limiting slots, welded to the outside of the lower connecting block and the upper connecting block; and multiple limiting blocks, corresponding to the limiting slots, welded to the periphery of the lower connecting block and the upper connecting block; wherein the limiting slots and limiting blocks cooperate with each other.

[0016] The technical effect of adopting the above-mentioned further solution is that the limiting slot and the card block should be welded to the outside and periphery of the lower and upper connecting blocks and cooperate with each other, which can limit the relative displacement of the connecting blocks.

[0017] In a preferred embodiment, the axial thermal expansion compensation interface of the heat exchanger further includes: a through hole, which is reserved to be opened on the base, and its periphery is sealed by a combination of a first sealing element and a second sealing element; wherein, the first sealing element is made of low-temperature fluororubber, and the second sealing element is made of an elastic alloy.

[0018] The technical effect of adopting the above-mentioned further solution is that: the base has a reserved through hole, and the periphery is sealed by a composite seal of low-temperature fluororubber first seal and elastic alloy second seal. The low-temperature fluororubber is adaptable to temperature fluctuations and keeps the seal, while the elastic alloy is resistant to deformation and provides strong protection. The two work together to greatly reduce the risk of leakage through the through hole and provide a reliable sealing guarantee for the overall stable operation of the device.

[0019] In a preferred embodiment, the axial thermal expansion compensation interface of the heat exchanger further includes: a connecting flange, which is riveted to the connection port of the corrugated cooling main pipe and the flow divider cone, as well as the connection port of the corrugated cooling main pipe and the compensation extension pipe.

[0020] The technical effect of adopting the above-mentioned further solution is that the connection flange is riveted to the connection port of the corrugated cooling main pipe and the diversion cone, and the connection port of the corrugated cooling main pipe and the compensation extension pipe, which can enhance the sealing of these key connection parts, prevent media leakage, and at the same time improve the stability of the connection structure, avoid the loosening of components due to operating vibration or thermal expansion and contraction, and lay a solid foundation for the efficient heat exchange and stable operation of the device.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0022] 1. This utility model's corrugated cooling main pipe adopts an axial full-length coverage design, penetrating the entire axial region of the motor. Combined with three-dimensional corrugated microribs spun on the inner wall, it not only expands the contact area between the cooling medium and the pipe wall but also guides the medium to form turbulence through the microrib structure, breaking the laminar flow thermal resistance of traditional smooth water pipes and making heat transfer more efficient and uniform. Secondly, the high thermal conductivity collar acts as a heat conduction bridge, tightly fitting with the corrugated cooling main pipe through an interference fit, quickly transferring heat from areas prone to localized high temperatures, such as the motor core slots and rotor retaining rings, to the main pipe, preventing localized heat accumulation and the formation of hot spots. Simultaneously, the flow divider cone, fixed to the main pipe inlet with reinforcing ribs, guides the cooling medium to enter the main pipe evenly, preventing uneven flow velocity caused by impact, further ensuring consistent heat exchange throughout the entire region. Through the synergy of these structures, the device can achieve rapid and uniform heat conduction and removal from all areas of the motor along the axial direction, effectively reducing temperature differences between different parts of the motor and avoiding excessively high hot spot temperatures. Compared to existing cooling water pipe solutions, the heat dissipation temperature difference can be significantly reduced, significantly improving the stability and service life of the motor.

[0023] 2. This utility model is equipped with a composite sealing structure. First, a first sealing element made of low-temperature fluororubber is installed around the through hole of the base. Its excellent elasticity and low-temperature sealing performance can adapt to the temperature fluctuations during motor operation. Then, a second sealing element made of elastic alloy is superimposed. By utilizing the high strength and deformation resistance of the alloy, the sealing effect is enhanced under high temperature and pressure change conditions. The double protection completely blocks the leakage path. Compared with the existing simple sealing structure, the leakage risk is greatly reduced. Attached Figure Description

[0024] Figure 1 A three-dimensional structural diagram of an axial thermal expansion compensation interface for a heat exchanger provided by this utility model;

[0025] Figure 2 A front view schematic diagram of an axial thermal expansion compensation interface for a heat exchanger provided by this utility model;

[0026] Figure 3 A magnified structural diagram of a high thermal conductivity collar for an axial thermal expansion compensation interface of a heat exchanger provided by this utility model;

[0027] Figure 4 An enlarged structural schematic diagram of a quick-connect component for an axial thermal expansion compensation interface of a heat exchanger provided by this utility model;

[0028] Figure 5 This is a partially enlarged structural diagram of an axial thermal expansion compensation interface for a heat exchanger provided by this utility model.

[0029] Legend:

[0030] 1. Corrugated cooling main pipe; 2. High thermal conductivity collar; 3. Connecting flange; 4. Diverter cone; 5. Reinforcing rib; 6. Compensating extension pipe; 7. Base; 8. Through hole; 9. First seal; 10. Second seal; 11. Corrugated compensating pipe; 12. Connecting bracket; 13. Limiting screw; 14. Positioning nut; 15. Lower connecting block; 16. Upper connecting block; 17. Limiting slot; 18. Limiting block. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1:

[0033] Please see Figures 1-5 This embodiment provides an axial thermal expansion compensation interface for a heat exchanger with high-efficiency thermal conduction and an axially covered structure. The specific idea is as follows:

[0034] An axial thermal expansion compensation interface for a heat exchanger includes a corrugated cooling main pipe 1. The interface further includes: a high thermal conductivity collar 2, a connecting flange 3, a flow divider cone 4, multiple reinforcing ribs 5, a compensation extension pipe 6, a base 7, a corrugated compensation pipe 11, and a connecting bracket 12.

[0035] It should be noted that the corrugated cooling main pipe 1 is designed as a continuous seamless structure, with its length completely covering the entire axial length of a single motor. The inner wall is processed with three-dimensional corrugated microribs through spinning. This microrib structure can significantly increase the heat exchange area and improve the heat exchange efficiency between the cooling medium and the main pipe wall.

[0036] The flow divider cone 4 is installed at the end inlet of the corrugated cooling main pipe 1.

[0037] It should be noted that the flow divider cone 4 and the corrugated cooling main pipe 1 are fixed by riveting through multiple reinforcing ribs 5 welded around the periphery of the flow divider cone 4, forming a stable inlet guide structure.

[0038] In addition, to enhance the reliability of the connection between the corrugated cooling main pipe 1 and adjacent components, connecting flanges 3 are used for riveting reinforcement at the connection port between the corrugated cooling main pipe 1 and the diversion cone 4, and at the connection port between the subsequent corrugated cooling main pipe 1 and the compensation extension pipe 6, to ensure the structural strength of the device.

[0039] The high thermal conductivity collar 2 is fitted on the outside of the corrugated cooling main pipe 1.

[0040] It should be noted that the inner hole of the high thermal conductivity collar 2 and the outer wall of the corrugated cooling main pipe 1 adopt an interference fit design, which ensures a tight fit and can quickly transfer heat.

[0041] Meanwhile, the outer contour of the high thermal conductivity collar 2 matches the motor core slot or the inner hole of the rotor retaining ring, which can be precisely embedded into the corresponding part of the motor to achieve efficient heat conduction.

[0042] The compensation extension pipe 6 is connected to one end of the high thermal conductivity collar 2, serving as an extension channel of the corrugated cooling main pipe 1 to further expand the heat exchange range.

[0043] In addition, a compensation extension tube 6 is provided on one side of the base 7.

[0044] It should be noted that the bottom of the base 7 is connected to the end of the compensation extension tube 6 through a basic connecting piece consisting of a corrugated compensation tube 11 and a connecting frame 12.

[0045] Two connecting brackets 12 are respectively riveted to both ends of the corrugated compensating pipe 11.

[0046] Meanwhile, the corrugated compensation pipe 11 is stably assembled with the compensation extension pipe 6 through the two connecting brackets 12, which initially alleviates the structural stress caused by axial thermal expansion and contraction.

[0047] In this embodiment, the axial full-length coverage of the corrugated cooling main pipe 1 and the three-dimensional corrugated microribs on the inner wall achieve uniform and efficient heat exchange throughout the axial region of the motor, avoiding local overheating. At the same time, the interference fit and matching design of the high thermal conductivity collar 2 enhances the heat transfer efficiency. Furthermore, the reinforcement of the connecting flange 3 and the reinforcing rib 5 ensures the connection stability of the core heat exchange components, meeting the heat exchange requirements of the motor during long-term operation.

[0048] Example 2:

[0049] like Figures 1-5 As shown in Example 1, this example provides a heat exchanger axial thermal expansion compensation interface with dual sealing and a precise compensation-type stable structure. The specific idea is as follows:

[0050] The axial thermal expansion compensation interface of the heat exchanger also includes: a base 7, a through hole 8, a first seal 9, a second seal 10, and a quick connector.

[0051] Among them, a through hole 8 is reserved on the base 7.

[0052] Meanwhile, to ensure the sealing performance of the through hole 8, a composite sealing structure consisting of a first sealing element 9 and a second sealing element 10 is adopted around its periphery.

[0053] The first sealing element 9 is made of low-temperature fluororubber, which can maintain good sealing performance and elasticity under low-temperature conditions.

[0054] In addition, the second seal 10 is made of an elastic alloy material, which combines elasticity and high strength, and can adapt to the deformation caused by temperature changes. The double seal effectively prevents fluid leakage.

[0055] The quick-connector that enables quick connection between the base 7 and the compensation extension tube 6 is located between the two.

[0056] As examples, in this embodiment, the quick-connect component includes: a corrugated compensating pipe 11, two connecting brackets 12, multiple limiting screws 13, a positioning nut 14, a lower connecting block 15, an upper connecting block 16, a limiting slot 17, and a limiting block 18.

[0057] The two ends of the corrugated compensation pipe 11 form an installation base for quick connection between the base 7 and the compensation extension pipe 6 through two connecting brackets 12.

[0058] In addition, multiple limiting screws 13 are evenly arranged in a ring between the two connecting frames 12.

[0059] The end of the limiting screw 13 is movably connected to the positioning nut 14.

[0060] It should be noted that the limit screw 13 and the positioning nut 14 are threaded together, which can precisely adjust the distance between the two connecting brackets 12, thereby controlling the expansion and contraction of the corrugated compensation pipe 11 and achieving precise compensation for axial thermal expansion.

[0061] Meanwhile, a lower connecting block 15 is riveted to the top of one of the connecting brackets 12.

[0062] The upper connecting block 16 is movably installed on the upper end of the lower connecting block 15.

[0063] It should be noted that the top of the upper connecting block 16 is riveted to the bottom of the base 7, and the lower connecting block 15 and the upper connecting block 16 are assembled by interlocking, which further improves the connection stability between the base 7 and the compensation extension tube 6.

[0064] To prevent the lower connecting block 15 and the upper connecting block 16 from shifting relative to each other after assembly, multiple limiting slots 17 are welded to the outside of the two.

[0065] Meanwhile, multiple limiting blocks 18 are welded to the periphery of the lower connecting block 15 and the upper connecting block 16.

[0066] It should be noted that the limiting slot 17 and the limiting block 18 cooperate with each other to form a bidirectional limiting, ensuring that the upper and lower connecting blocks 15 are accurately positioned after assembly and that no circumferential or axial displacement occurs.

[0067] In addition, all core connection ports, including the corrugated cooling main pipe 1 and the diversion cone 4, and the corrugated cooling main pipe 1 and the compensation extension pipe 6, are still reinforced by riveting with the connecting flange 3 to ensure the overall structural sealing.

[0068] In this embodiment, the leakage problem of the through hole 8 is completely solved by the dual composite sealing structure of the first sealing element 9 and the second sealing element 10, which adapts to the changes in high and low temperature working conditions. At the same time, the thread adjustment of the limiting screw 13 and the positioning nut 14, combined with the elastic deformation of the corrugated compensation tube 11, achieves precise compensation for axial thermal expansion, avoiding damage to the structure due to thermal expansion and contraction. Meanwhile, the bidirectional limiting of the limiting slot 17 and the limiting block 18, as well as the engaging assembly of the upper and lower connecting blocks 15, greatly improves the connection accuracy and stability between the base 7 and the compensation extension tube 6, ensuring the reliability of the device in long-term operation.

[0069] Working Principle: This equipment is an axial thermal expansion compensation interface for heat exchangers. In use, first connect the flow divider cone 4 to the corrugated cooling main pipe 1. Then, install the connecting flange 3 at the connection point and reinforce it with riveting to enhance the connection's sealing and structural strength. Next, take a high thermal conductivity collar 2, aligning its inner hole with the outer wall of the corrugated cooling main pipe 1. Utilize the interference fit characteristic to fit the collar onto the outside of the main pipe, ensuring that the outer contour of the collar matches the inner hole of the motor core slot or rotor retaining ring, thus completing the heat-conducting structure assembly. Then, place the base 7 on one side of the compensation extension pipe 6. Rivet the lower connecting block 15 to the top of the lower connecting frame 12. Movably engage the upper connecting block 16 on the upper end of the lower connecting block 15, with the top of the upper connecting block 16 riveted to the bottom of the base 7. Subsequently, weld multiple limiting slots 17 to the outside of the upper and lower connecting blocks 15, and correspondingly weld limiting blocks 18 around their periphery, allowing the slots and blocks to cooperate for bidirectional limiting.

[0070] When the motor undergoes axial thermal expansion due to temperature rise during operation, the three-dimensional corrugated microribs spun on the inner wall of the main pipe increase the contact area between the medium and the pipe wall. Combined with the turbulence effect of the medium in the corrugated channel, it breaks through the laminar thermal resistance of traditional smooth pipes, significantly improving heat exchange efficiency. At the same time, the high thermal conductivity collar 2 acts as a heat conduction bridge, which can quickly conduct the local high heat at the motor core slot or rotor retaining ring to the main pipe. The flow divider cone 4 guides the cooling medium to enter the interior of the main pipe evenly, avoiding local flow velocity unevenness caused by medium impact, further ensuring the uniformity of heat exchange throughout the entire area, and preventing local overheating of the motor.

[0071] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0072] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A heat exchanger axial thermal elongation compensation interface comprising a corrugated cooling main pipe (1), characterized in that, The axial thermal expansion compensation interface of the heat exchanger also includes: The flow divider cone (4) is riveted to the end inlet of the corrugated cooling main pipe (1) by multiple reinforcing ribs (5) welded to its periphery; A high thermal conductivity collar is movably connected to the outside of the corrugated cooling main pipe (1); Compensation extension tube (6) is connected to one end of the high thermal conductivity collar; The base (7) is located on one side of the compensation extension tube (6), and its bottom is stably connected to the end of the compensation extension tube (6) through a quick connector; The length of the corrugated cooling main pipe (1) covers the entire axial length of a single motor, and its structure is continuous and seamless, with three-dimensional corrugated microribs spun on the inner wall.

2. The heat exchanger axial thermal growth compensation interface of claim 1, wherein, The high thermal conductivity collar component includes: A high thermal conductivity collar (2) is fitted and installed on the outside of the corrugated cooling main pipe (1), and its outer contour matches the inner hole of the motor core slot or rotor retaining ring. The inner hole of the high thermal conductivity collar (2) is interference-fitted with the outer wall of the corrugated cooling main pipe (1).

3. The heat exchanger axial thermal growth compensation interface of claim 1, wherein, The quick-connect component includes: A corrugated compensation tube (11) is movably disposed at the upper end of the compensation extension tube (6); There are two connecting brackets (12), which are riveted to both ends of the corrugated compensation pipe (11); The corrugated compensation pipe (11) is stably connected to the compensation extension pipe (6) through the connecting frame (12).

4. The heat exchanger axial thermal expansion compensation interface according to claim 3, characterized in that, The quick-connect device also includes: Multiple limiting screws (13) are provided and are evenly arranged in a ring between the two connecting frames (12); The positioning nut (14) is movably connected to the end of the limiting screw (13); The limiting screw (13) and the positioning nut (14) are connected by threads.

5. The heat exchanger axial thermal growth compensation interface of claim 4, wherein, The quick-connect device also includes: The lower connecting block (15) is riveted to the top of one of the connecting frames (12); The upper connecting block (16) is movably installed on the upper end of the lower connecting block (15); The top of the upper connecting block (16) is riveted to the bottom of the base (7), and the lower connecting block (15) engages with the upper connecting block (16).

6. The heat exchanger axial thermal growth compensation interface of claim 5, wherein, The quick-connect device also includes: Multiple limiting slots (17) are provided and welded to the outside of the lower connecting block (15) and the upper connecting block (16); Multiple limiting blocks (18) are provided corresponding to the limiting slots (17), and are welded to the periphery of the lower connecting block (15) and the upper connecting block (16); The limiting slot (17) and the limiting block (18) cooperate with each other.

7. The heat exchanger axial thermal growth compensation interface of claim 6, wherein, The axial thermal expansion compensation interface of the heat exchanger also includes: A through hole (8) is reserved to be opened on the base (7), and its periphery is sealed by a combination of a first seal (9) and a second seal (10); The first sealing element (9) is made of low-temperature fluororubber, and the second sealing element (10) is made of elastic alloy.

8. The heat exchanger axial thermal growth compensation interface of claim 7, wherein, The axial thermal expansion compensation interface of the heat exchanger also includes: The connecting flange (3) is riveted to the connection port of the corrugated cooling main pipe (1) and the diversion cone (4), as well as the connection port of the corrugated cooling main pipe (1) and the compensation extension pipe (6).

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