An S-shaped fin EGR cooler core structure

Abstract

The present application relates to the technical field of cooler, specifically a kind of S-shaped fin EGR cooler core structure, including two housings, shell piece is arranged between two the housing, the shell piece inside is provided with fin pipe piece, the left and right ends of the fin pipe piece are both communicated and install communication piece, two The communication piece is respectively communicated on the inside end of two housings, multiple S-shaped fins are installed equidistantly in the fin pipe piece, auxiliary piece is communicated and installed on the upper outer end of the shell piece, the end of the auxiliary piece away from the shell piece is communicated and set up installation cylinder, inlet and outlet pipe is set up in the installation cylinder, annular plate is set up on the outer end of the inlet and outlet pipe, the annular plate is installed in installation cylinder, the annular inner wall of the installation cylinder is outwardly recessed to form a clamping groove, the clamping groove is assembled with limiting piece, the limiting piece is attached on the outer end of annular plate, this design realizes the convenient disassembly between inlet and outlet pipe and upper cover, can replace inlet and outlet pipe, improve service life, reduce equipment cost.

Description

Technical Field

[0001] This invention relates to an S-shaped finned EGR cooler core structure, belonging to the field of cooler technology. Background Technology

[0002] In power equipment such as gasoline engines, the EGR cooler is one of the main components, mainly used to cool the corresponding medium. Currently, the core structure of the EGR cooler generally consists of an outer shell, two perforated main plates, two perforated secondary main plates, multiple support plates, multiple flat tubes, multiple fins, and two pipes. In production, the fins are first placed into the flat tubes, and the left and right ends of the multiple flat tubes are respectively passed through different holes on the two secondary main plates. Support plates are placed between two adjacent flat tubes, and then brazing is performed to form a semi-finished product. The semi-finished product is then placed into the outer shell, and the main plates are placed on the left and right ends of the outer shell. The ends of the multiple flat tubes are respectively passed through different holes on the main plates. Then, the two pipes are connected to the outer shell and assembled. Brazing is performed again to form the finished product.

[0003] During assembly, the head of the pipe is usually inserted into the delivery hose of the medium flow pipeline. In order to ensure the connection strength between the delivery hose and the pipe, pipe clamps are usually used to clamp the connection between the delivery hose and the pipe. However, the assembly of pipe clamps is all done manually and generally requires skilled personnel to operate. Newcomers cannot effectively control the operating force and are prone to excessive operating force, which will cause the connection between the delivery hose and the pipe to be subjected to greater pressure.

[0004] During prolonged use, the pipes are prone to overheating, which increases the probability of damage under high pressure. Since the pipes are connected to the shell of the EGR cooler core structure by welding, damage to the pipes renders the entire EGR cooler core structure unusable, affecting its service life and increasing equipment costs. Summary of the Invention

[0005] To address the problems in the prior art, the present invention provides an S-shaped finned EGR cooler core structure.

[0006] The technical solution adopted by the present invention to solve its technical problem is: an S-shaped fin EGR cooler core structure, including two oppositely arranged shells, a shell component is provided between the two shells, and the shells extend into the shell component at their inward ends, and a connecting component is provided at the outward ends of the shells;

[0007] The shell component is provided with a finned tube component. Both ends of the finned tube component are connected to the connecting parts, and the connecting parts are located inside the shell component. The two connecting parts are respectively connected to the two inner ends of the outer shell. Multiple S-shaped fins are installed equidistantly inside the finned tube component.

[0008] The upper outer end of the housing is connected to an auxiliary component. The auxiliary component is connected to an installation cylinder at one end away from the housing. An inlet and outlet pipe is provided inside the installation cylinder and extends out of the outside of the installation cylinder. An annular plate is provided at the outer end of the inlet and outlet pipe, and the annular plate and the inlet and outlet pipe are integrated. The lower end face of the annular plate coincides with the lower end face of the inlet and outlet pipe.

[0009] The annular plate is installed inside the mounting cylinder. The inner wall of the annular plate is recessed outward to form a groove. A limiting member is assembled on the groove. The limiting member is attached to the outer end of the annular plate and is located outside the inlet / outlet pipe.

[0010] Furthermore, the mounting cylinder has two oppositely arranged half-plugs at its outer end, and the half-plugs extend into the mounting cylinder at their inner ends. Both half-plugs are attached to the outer ends of the inlet and outlet pipes, and the two half-plugs are attached to each other. The half-plugs are located on the outer end of the limiting member.

[0011] The mounting cylinder is fitted with the sealing element on the inner wall, and the sealing element is fitted on the inner end of the annular plate. The outer end of the inlet / outlet pipe has anti-slip grooves, and the anti-slip grooves are located on the outer side of the half-piece plug.

[0012] Furthermore, the auxiliary component includes an inner cylinder, which is connected and installed at the upper outer end of the housing component;

[0013] The inner cylinder is provided with a straight cylinder at its outer end, and the inner cylinder extends into the straight cylinder. The straight cylinder is connected to an installation cylinder at its outer end, and the installation cylinder and the straight cylinder are integrated into one structure.

[0014] Furthermore, the housing component includes an upper cover and a lower cover, the upper cover being mounted on the upper end of the lower cover, and the outer shell being disposed at the outward end of the lower cover and extending into the lower cover;

[0015] The outer shell is installed on the outer end of the upper cover and extends into the upper cover. The outer end of the upper cover is connected to two inner cylinders, and the inner cylinders and the upper cover are integrated into one structure.

[0016] Furthermore, the finned tube fitting includes multiple finned tube outer shells and multiple finned tube inner shells, and the cross-sections of both the finned tube outer shells and the finned tube inner shells are U-shaped;

[0017] The finned tube outer shell and the finned tube inner shell are arranged alternately. The finned tube outer shell is provided at the upper end of the finned tube inner shell, and the finned tube inner shell extends into the finned tube outer shell. An S-shaped fin is provided at the bottom of the inner shell, and the other end of the S-shaped fin is installed at the top of the inner shell.

[0018] Multiple second protrusions are stamped at the middle of the upper end of the finned tube outer shell, and multiple third protrusions are stamped at the middle of the lower end of the finned tube inner shell. The multiple third protrusions on the inner shell of the finned tube are respectively connected to the multiple second protrusions on the adjacent lower finned tube outer shell.

[0019] Multiple fourth protrusions are stamped in the center of the top of the upper cover. Multiple second protrusions on the outer shell of the finned tube at the top are connected to the multiple fourth protrusions. Multiple first protrusions are stamped in the center of the bottom of the lower cover. Multiple third protrusions on the inner shell of the finned tube at the bottom are connected to the multiple first protrusions.

[0020] Furthermore, the connecting member includes a plurality of first U-shaped plates and a plurality of second U-shaped plates, the first U-shaped plates and the second U-shaped plates are arranged alternately, the first U-shaped plates are installed on the outer end of the finned tube shell, and the finned tube shell and the first U-shaped plates are integrated into one structure;

[0021] The second U-shaped plate is disposed on the outer end of the inner shell of the finned tube, and the inner shell of the finned tube and the second U-shaped plate are integrally structured. The second U-shaped plate is installed at the lower end of the first U-shaped plate and extends into the first U-shaped plate. The second U-shaped plate is installed at the upper end of the first U-shaped plate on the adjacent lower side.

[0022] The first U-shaped plate at the top is installed inside the top of the upper cover, and the second U-shaped plate at the bottom is installed inside the bottom of the lower cover.

[0023] Furthermore, the connector includes an auxiliary cylinder, which is connected to the outer end of the outer shell, and the outer shell and the auxiliary cylinder are integrally formed.

[0024] The auxiliary cylinder is provided with an outer cylinder at its outer end, and the auxiliary cylinder extends into the outer cylinder. The outer cylinder is provided with a mounting plate at its outer end, and the outer cylinder extends to the outer end of the mounting plate. The outer cylinder and the mounting plate are integrated into one structure.

[0025] The mounting plate has two mounting holes formed by an inward recess on its outer end, and the mounting holes penetrate the mounting plate. Two nuts are symmetrically arranged on the inner end of the mounting plate, and the nuts are arranged in communication with the mounting holes. The two nuts are located on the upper and lower sides of the housing.

[0026] The beneficial effects of this invention are:

[0027] 1. By using snap rings and slots, the annular plate and the mounting cylinder are restricted in their installation, which in turn restricts the installation between the inlet / outlet pipe and the mounting cylinder. This allows for easy disassembly and assembly of the inlet / outlet pipe and the top cover, enabling replacement of the inlet / outlet pipe, extending its service life, and reducing equipment costs.

[0028] 2. The housing components formed by the lower and upper covers are easily assembled and disassembled using bolts, mounting holes, and nuts, while ensuring the installation stability of the housing components formed by the lower and upper covers and effectively avoiding the probability of detachment.

[0029] 3. Place the S-shaped fins into the inner shell of the finned tube, and then make the inner shell of the finned tube and the outer shell of the finned tube form a flat tube. Stack multiple flat tubes in an up-down arrangement, and use the second boss and the third protrusion to make a gap between two adjacent flat tubes, so that multiple flat tubes form a finned tube. At this time, the second U-shaped plate is attached to the upper end of the first U-shaped plate on the adjacent lower side.

[0030] The finned tubes are placed into the housing formed by the upper and lower covers. Then, the auxiliary cylinder is inserted into the outer cylinder, and the mounting plate with two nuts is connected to the housing. The assembly is then welded together. The assembly is carried out using a stacked operation, which is convenient for operation. The upper cover, lower cover, housing, mounting plate, multiple finned tube housings and multiple finned tube inner housings are directly brazed together, which effectively reduces production steps and improves production efficiency.

[0031] 4. Multiple first U-shaped plates and multiple second U-shaped plates form a connecting part for medium transportation. Multiple third protrusions and multiple fourth protrusions cooperate to perform support operations. This can reduce the number of two main plates, two sub-main plates and multiple support plates in the traditional cooler core structure, effectively reducing structural costs and product weight, thereby reducing energy consumption.

[0032] 5. By forming multiple S-shaped channels within the flat tube through S-shaped fins, the medium can flow through multiple S-shaped channels, increasing the flow time and contact area of ​​the medium within the flat tube, thereby increasing the heat exchange time and improving the heat exchange effect. Attached Figure Description

[0033] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of the core structure of an S-shaped finned EGR cooler according to the present invention;

[0035] Figure 2 This is a cross-sectional view of the core structure of an S-shaped finned EGR cooler according to the present invention;

[0036] Figure 3 This is a perspective view of the outer shell in the core structure of an S-shaped finned EGR cooler according to the present invention;

[0037] Figure 4 This is a perspective view of the upper cover in the core structure of an S-shaped finned EGR cooler according to the present invention;

[0038] Figure 5 This is a perspective view of the lower cover in the core structure of an S-shaped finned EGR cooler according to the present invention;

[0039] Figure 6 This is an assembly diagram of the inlet and outlet pipes and the mounting cylinder in the core structure of an S-shaped finned EGR cooler according to the present invention.

[0040] Figure 7 This is an assembly diagram of the finned tube outer shell and the finned tube inner shell in the core structure of an S-shaped finned EGR cooler according to the present invention.

[0041] Figure 8 This is a perspective view of the finned tube outer shell in the core structure of an S-shaped finned EGR cooler according to the present invention;

[0042] Figure 9 This is a side view of the finned tube outer shell in the core structure of an S-shaped finned EGR cooler according to the present invention;

[0043] Figure 10 for Figure 9 Enlarged view of section A in the middle;

[0044] Figure 11 This is a perspective view of the inner shell of the finned tube in the core structure of an S-shaped finned EGR cooler according to the present invention.

[0045] Figure 12 This is a side view of the inner shell of the finned tube in the core structure of an S-shaped finned EGR cooler according to the present invention.

[0046] Figure 13 for Figure 12 Enlarged view of section B in the middle;

[0047] Figure 14 This is a perspective view of the S-shaped fins in the core structure of an S-shaped finned EGR cooler according to the present invention.

[0048] In the diagram: 1. Top cover, 2. Bottom cover, 3. Outer shell, 4. Mounting plate, 5. Finned tube outer shell, 6. S-shaped fin, 7. Finned tube inner shell, 11. Inlet / outlet pipe, 12. Anti-slip texture, 13. Half-piece plug, 14. Mounting cylinder, 15. Straight cylinder, 16. Snap ring, 17. Annular plate, 18. Annular rubber pad, 19. Inner cylinder, 21. First boss, 31. Auxiliary cylinder, 41. Nut, 42. Outer cylinder, 43. Mounting hole, 51. Second boss, 52. First U-shaped plate, 71. Second U-shaped plate, 72. Third boss, 101. Fourth boss. Detailed Implementation

[0049] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0050] Example 1:

[0051] When installing the EGR cooler core structure, the pipes for the inlet and outlet of the medium are generally connected to the EGR cooler core structure. However, during the flow of the medium, the flow of the medium will generate impact force, which can easily cause the connection between the pipe and the EGR cooler core structure to loosen, resulting in a higher probability of leakage and poor stability.

[0052] To solve the above problems, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the present invention provides a technical solution: an S-shaped fin EGR cooler core structure, comprising two oppositely arranged outer shells 3, with the lower cover 2 installed on the lower end of the upper cover 1;

[0053] Two outer shells 3 extending into the lower cover 2 and the upper cover 1 are respectively installed on the left and right ends of the shell component formed by the lower cover 2 and the upper cover 1. An auxiliary cylinder 31, which is integral with the outer shell 3, is connected to the outward end of the outer shell 3. The two outer shells 3 work together to realize the entry and exit of the medium.

[0054] An auxiliary cylinder 31 extending into the outer cylinder 42 is placed on the inner end of the outer cylinder 42, and an outer cylinder 42 extending to the outer end of the mounting plate 4 and having an integral structure with the mounting plate 4 is placed on the inner end of the mounting plate 4. The auxiliary cylinder 31 and the outer cylinder 42 are used together to connect the mounting plate 4 and the outer shell 3.

[0055] Two mounting holes 43 are formed by recessing the outer end of the mounting plate 4 inward. Two nuts 41, which are located on the upper and lower sides of the housing and are connected to the mounting holes 43, are symmetrically placed on the inner end of the mounting plate 4. The mounting holes 43 and the nuts 41 are used to assemble the mounting plate 4 onto the carrier.

[0056] During assembly, the mounting plate 4 is first brought into contact with the carrier, and the mounting hole 43 is aligned with the hole on the carrier. Then, the shank of the bolt passes through the hole on the carrier and the mounting hole 43 and is threaded into the nut 41 to secure the mounting plate 4 to the carrier. At this time, the opening on the carrier is in communication with the outer cylinder 42, which enables convenient disassembly and assembly of the shell component formed by the lower cover 2 and the upper cover 1, and ensures the installation stability of the shell component formed by the lower cover 2 and the upper cover 1, effectively avoiding the probability of leakage.

[0057] Example 2:

[0058] Currently, the core structure of an EGR cooler generally consists of an outer shell 3, two perforated main plates, two perforated secondary main plates, multiple support plates, multiple flat tubes, and multiple fins. In the manufacturing of the EGR cooler core structure, the two perforated secondary main plates, multiple support plates, multiple flat tubes, and multiple fins are usually assembled and brazed first to form a semi-finished product. Then, the semi-finished product, the two perforated main plates, and the outer shell 3 are assembled and brazed to complete the manufacturing process. On the one hand, this makes the EGR cooler core structure heavier, increases structural costs, and increases subsequent energy consumption. On the other hand, it requires two brazing processes to complete the manufacturing, which affects production efficiency.

[0059] To solve the above problems, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, multiple U-shaped finned tube outer shells 5 and multiple U-shaped finned tube inner shells 7 are disposed inside the shell component formed by the upper cover 1 and the lower cover 2, and the finned tube outer shells 5 and the finned tube inner shells 7 are arranged alternately. The finned tube inner shells 7 extending into the finned tube outer shells 5 are disposed at the lower end of the finned tube outer shells 5, and the finned tube outer shells 5 and the finned tube inner shells 7 will form a flat tube component.

[0060] Multiple second protrusions 51 are stamped at the middle of the upper end of the finned tube outer shell 5, and multiple third protrusions 72 are stamped at the middle of the lower end of the finned tube inner shell 7. The multiple third protrusions 72 on the finned tube inner shell 7 are connected to the multiple second protrusions 51 on the adjacent lower finned tube outer shell 5. The second protrusions 51 and the third protrusions 72 are used in conjunction to support the two adjacent flat tubes on one hand, and to braze the two adjacent flat tubes on the other hand.

[0061] Multiple fourth protrusions 101 are stamped in the middle of the top of the upper cover 1. The multiple fourth protrusions 101 are connected to multiple second protrusions 51 on the uppermost finned tube shell 5. The second protrusions 51 and the fourth protrusions 101 work together to support the upper cover 1 and the uppermost finned tube shell 5, and to braze the upper cover 1 and the uppermost finned tube shell 5.

[0062] Multiple first protrusions 21 are stamped in the middle of the bottom of the lower cover 2. The multiple first protrusions 21 are connected to multiple third protrusions 72 on the finned tube inner shell 7 located at the bottom. The first protrusions 21 and the third protrusions 72 work together to support the lower cover 2 and the finned tube inner shell 7 located at the bottom, and to braze the upper cover 1 and the finned tube inner shell 7 located at the bottom.

[0063] The S-shaped fin 6 is set on the bottom of the inner shell 7 of the finned tube, while the other end of the S-shaped fin 6 is installed on the top of the inner shell 5 of the finned tube. The S-shaped fin 6 is installed in the flat tube formed by the outer shell 5 and the inner shell 7 of the finned tube. The S-shaped fin 6 increases the flow time of the medium in the flat tube and increases the heat exchange area.

[0064] Multiple first U-shaped plates 52 and multiple second U-shaped plates 71 are installed into the housing formed by the upper cover 1 and the lower cover 2. The first U-shaped plates 52 and the second U-shaped plates 71 are arranged alternately. Two first U-shaped plates 52, which are integral with the finned tube outer shell 5, are respectively installed at the left and right ends of the finned tube outer shell 5. Two second U-shaped plates 71, which are integral with the finned tube inner shell 7, are respectively set at the left and right ends of the finned tube inner shell 7. Then, the second U-shaped plates 71 extending into the first U-shaped plates 52 are installed at the lower end of the first U-shaped plates 52. The first U-shaped plates 52 and the second U-shaped plates 71 work together to form inlets and outlets at the left and right ends of the flat tube.

[0065] The second U-shaped plate 71 is installed on the upper end of the first U-shaped plate 52 on the adjacent lower side, while the uppermost first U-shaped plate 52 is installed inside the top of the upper cover 1, and the lowermost second U-shaped plate 71 is set inside the bottom of the lower cover 2, so that the multiple first U-shaped plates 52 and the multiple second U-shaped plates 71 form a connecting member, and the connecting member is arranged in communication with the outer shell 3.

[0066] During production, two nuts 41 are symmetrically welded to the inner end of the mounting plate 4, and an appropriate number of finned tube outer shells 5 and finned tube inner shells 7 are selected. Then, brazing paste is applied to the upper cover 1, lower cover 2, first U-shaped plate 52, second U-shaped plate 71, outer shell 3, multiple finned tube outer shells 5 and multiple finned tube inner shells 7.

[0067] Place the S-shaped fin 6 into the inner shell 7 of the finned tube, and then insert the upper end of the inner shell 7 into the outer shell 5 of the finned tube, so that the inner shell 7 and the outer shell 5 of the finned tube form a flat tube. At this time, the upper end of the second U-shaped plate 71 is inserted into the first U-shaped plate 52, and the S-shaped fin 6 is located inside the flat tube. Repeat the above steps to produce multiple flat tubes.

[0068] Then, multiple flat tubes are stacked in an up-down arrangement, so that multiple third protrusions 72 at the lower end of the inner shell 7 of the finned tube contact each other with multiple second protrusions 51 at the upper end of the adjacent outer shell 5 of the finned tube. Through the second protrusions 51 and the third protrusions, a gap is formed between two adjacent flat tubes, thereby forming a finned tube from multiple flat tubes. At this time, the second U-shaped plate 71 is attached to the upper end of the adjacent lower first U-shaped plate 52, and multiple first U-shaped plates 52 and multiple second U-shaped plates 71 will form a connecting part at both ends of the finned tube.

[0069] Then, the finned tube is placed inside the lower cover 2, so that the multiple first protrusions 21 respectively attach to the lower ends of the multiple third protrusions 72 at the lower end of the finned tube inner shell 7 at the bottom, and the second U-shaped plate 71 located at the bottom attaches to the bottom inside of the lower cover 2. The first protrusions 21 and the third protrusions 72 work together to form a gap between the finned tube and the bottom inside of the lower cover 2.

[0070] Then, the two outer shells 3 are respectively inserted into the two opening positions of the lower cover 2, and the two outer shells 3 are respectively in contact with the two connecting parts. Then, the upper cover 1 is placed on the upper end of the lower cover 2. At this time, multiple fourth protrusions are respectively attached to the upper end of multiple second protrusions 51 on the uppermost finned tube outer shell 5, while the first U-shaped plate 52 located on the uppermost side is attached to the inner top of the upper cover 1. The second protrusions 51 and the fourth protrusions cooperate to form a gap between the finned tube and the inner top of the upper cover 1.

[0071] Then, the auxiliary cylinder 31 is inserted into the outer cylinder 42, so that the mounting plate 4 with two nuts 41 is connected to the outer shell 3, thus forming a semi-finished product. The semi-finished product is then placed in the brazing furnace for welding and forming. The assembly and manufacturing are carried out by superimposed operation, which is convenient for operation. The upper cover 1, lower cover 2, outer shell 3, mounting plate 4, multiple finned tube outer shells 5 and multiple finned tube inner shells 7 are directly brazed as a whole, which effectively reduces production steps and improves production efficiency.

[0072] Multiple first U-shaped plates 52 and multiple second U-shaped plates 71 form a connecting part for transporting the medium. Multiple third protrusions and multiple fourth protrusions cooperate to perform support work, which can reduce the two main plates, two sub-main plates and multiple support plates on the traditional cooler core structure, effectively reduce structural costs and product weight, thereby reducing energy consumption.

[0073] The produced cooler core structure is assembled into power equipment such as gasoline engines. During use, the cooling medium moves in and out of the shell, while the corresponding medium flows through a shell 3 into the connecting part. Then the medium is distributed and transported to multiple flat tubes for flow.

[0074] At this time, the medium flowing inside the flat tube and the cooling medium flowing inside the shell exchange heat to achieve heat dissipation. The S-shaped fins 6 will form multiple S-shaped channels inside the flat tube, allowing the medium to flow through multiple S-shaped channels, increasing the flow time and contact area of ​​the medium inside the flat tube, increasing the heat exchange time, and improving the heat exchange effect.

[0075] Example 3:

[0076] like Figure 1 , Figure 4 and Figure 6 As shown, two inner cylinders 19, which are integral with the upper cover 1, are connected and installed on the outer end of the upper cover 1. The inner cylinder 19 extending into the straight cylinder 15 is set on the inner end of the straight cylinder 15. The mounting cylinder 14, which is integral with the straight cylinder 15, is connected and set on the outer end of the straight cylinder 15. The inner cylinder 19 and the straight cylinder 15 are used together to make the mounting cylinder 14 and the upper cover 1 connected.

[0077] The sealing element is attached to the inner wall of the mounting cylinder 14, and the annular plate 17, which is integral with the inlet and outlet pipe 11 and whose lower end face coincides with the lower end face of the inlet and outlet pipe 11, is placed on the outer end of the inlet and outlet pipe 11. Then, the inlet and outlet pipe 11 extending out of the outer side of the mounting cylinder 14 is inserted into the mounting cylinder 14, and the annular plate 17 is attached to the outer end of the sealing element. The sealing element makes the inlet and outlet pipe 11 and the mounting cylinder 14 sealed together. The sealing element can be an annular rubber gasket 18.

[0078] A groove is formed by recessing the inner wall of the mounting cylinder 14 outward. The groove provides installation space for the limiting component. The limiting component located outside the inlet / outlet pipe 11 is assembled into the groove. At this time, the annular plate 17 is attached to the inner end of the limiting component. The limiting component restricts the installation between the annular plate 17 and the mounting cylinder 14. The limiting component can be a retaining spring 16.

[0079] Two opposing half-plugs 13, extending into the mounting cylinder 14 and fitting against the outer end of the inlet / outlet pipe 11, are placed on the outer end of the mounting cylinder 14. The two half-plugs 13 fit together and work together to seal the opening of the mounting cylinder 14, thus protecting the internal components of the mounting cylinder 14. Anti-slip grooves 12 are formed on the annular outer end of the inlet / outlet pipe 11, facing outwards from the half-plugs 13. The anti-slip grooves 12 increase the coefficient of friction and assist in the disassembly and assembly of the inlet / outlet pipe 11 and the pipes on the cooling medium delivery pipeline.

[0080] During brazing, brazing agent is first applied to the inner cylinder 19 and other components. Then, the other components are assembled. The inner cylinder 19 is then inserted into the straight cylinder 15 to form a semi-finished product. The semi-finished product is then placed in the brazing furnace to be welded into shape.

[0081] During assembly, the annular rubber pad 18 is first placed into the mounting cylinder 14. Then, the inlet / outlet pipe 11 and the annular plate 17 are inserted into the mounting cylinder 14, so that the annular plate 17 fits against the outward end of the annular rubber pad 18. Then, the retaining spring 16 is assembled into the retaining groove to restrict the installation between the annular plate 17 and the mounting cylinder 14, thereby restricting the installation between the inlet / outlet pipe 11 and the mounting cylinder 14. This allows for convenient disassembly and assembly between the inlet / outlet pipe 11 and the top cover 1, enabling the replacement of the inlet / outlet pipe 11, extending its service life, and reducing equipment costs.

[0082] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A core structure for an S-shaped finned EGR cooler, characterized in that: It includes two opposing outer shells (3), a shell member is provided between the two outer shells (3), and the outer shells (3) extend into the shell member at their inward ends, and a connecting member is provided at the outward ends of the outer shells (3); The shell component is provided with a finned tube component. Both ends of the finned tube component are connected to a connecting component, and the connecting component is located inside the shell component. The two connecting components are respectively connected to the inward ends of the two outer shells (3). Multiple S-shaped fins (6) are installed at equal intervals inside the finned tube component. The upper outer end of the housing is connected to an auxiliary installation component. The auxiliary installation component is connected to an installation cylinder (14) at one end away from the housing. An inlet / outlet pipe (11) is provided inside the installation cylinder (14), and the inlet / outlet pipe (11) extends out of the outside of the installation cylinder (14). An annular plate (17) is provided at the outer end of the inlet / outlet pipe (11), and the annular plate (17) and the inlet / outlet pipe (11) are integrated. The lower end face of the annular plate (17) coincides with the lower end face of the inlet / outlet pipe (11). The annular plate (17) is installed inside the mounting cylinder (14). The inner wall of the mounting cylinder (14) is recessed outward to form a groove. A limiting member is mounted on the groove. The limiting member is attached to the outer end of the annular plate (17) and is located outside the inlet / outlet pipe (11). The mounting cylinder (14) has two oppositely arranged half-plugs (13) on its outer end, and the half-plugs (13) extend into the mounting cylinder (14) on their inner end. Both half-plugs (13) are attached to the outer end of the inlet / outlet pipe (11), and the two half-plugs (13) are attached to each other. The half-plugs (13) are located on the outer end of the limiting member. The mounting cylinder (14) is fitted with a sealing element on its inner wall, and the sealing element is fitted on the inner end of the annular plate (17). The outer end of the inlet / outlet pipe (11) has anti-slip grooves (12), and the anti-slip grooves (12) are located on the outer side of the half-piece plug (13). The auxiliary component includes an inner cylinder (19), which is connected to the outer end of the upper part of the housing component; The inner cylinder (19) is provided with a straight cylinder (15) at its outer end, and the inner cylinder (19) extends into the straight cylinder (15). The straight cylinder (15) is connected to the mounting cylinder (14) at its outer end, and the mounting cylinder (14) and the straight cylinder (15) are integrated.

2. The S-shaped finned EGR cooler core structure according to claim 1, characterized in that: The housing component includes an upper cover (1) and a lower cover (2). The upper cover (1) is installed on the upper end of the lower cover (2), and the outer shell (3) is disposed on the outer end of the lower cover (2) and extends into the lower cover (2). The outer shell (3) is installed on the outer end of the upper cover (1) and extends into the upper cover (1). The outer end of the upper cover (1) is connected to two inner cylinders (19), and the inner cylinders (19) and the upper cover (1) are integrated.

3. The S-shaped finned EGR cooler core structure according to claim 2, characterized in that: The finned tube fitting includes multiple finned tube outer shells (5) and multiple finned tube inner shells (7), and the cross-sections of the finned tube outer shells (5) and the finned tube inner shells (7) are both U-shaped; The finned tube outer shell (5) and the finned tube inner shell (7) are arranged alternately. The finned tube outer shell (5) is provided at the upper end of the finned tube inner shell (7), and the finned tube inner shell (7) extends into the finned tube outer shell (5). An S-shaped fin (6) is provided at the bottom of the inner shell (7), and the other end of the S-shaped fin (6) is installed at the top inside the finned tube outer shell (5). Multiple second bosses (51) are stamped at the middle of the upper end of the finned tube outer shell (5), and multiple third bosses (72) are stamped at the middle of the lower end of the finned tube inner shell (7). The multiple third bosses (72) on the finned tube inner shell (7) are respectively connected to the multiple second bosses (51) on the adjacent lower finned tube outer shell (5). The upper cover (1) has multiple fourth protrusions (101) stamped in the middle of the top of its interior. Multiple second protrusions (51) on the uppermost finned tube shell (5) are connected to the multiple fourth protrusions (101). The lower cover (2) has multiple first protrusions (21) stamped in the middle of the bottom of its interior. Multiple third protrusions (72) on the lowermost finned tube inner shell (7) are connected to the multiple first protrusions (21).

4. The S-shaped finned EGR cooler core structure according to claim 3, characterized in that: The connecting member includes a plurality of first U-shaped plates (52) and a plurality of second U-shaped plates (71), the first U-shaped plates (52) and the second U-shaped plates (71) are arranged alternately, the first U-shaped plates (52) are installed on the outer end of the finned tube shell (5), and the finned tube shell (5) and the first U-shaped plates (52) are integrated. The second U-shaped plate (71) is disposed on the outer end of the inner shell (7) of the finned tube, and the inner shell (7) of the finned tube and the second U-shaped plate (71) are integrally structured. The second U-shaped plate (71) is installed at the lower end of the first U-shaped plate (52), and the second U-shaped plate (71) extends into the first U-shaped plate (52). The second U-shaped plate (71) is installed at the upper end of the first U-shaped plate (52) on the adjacent lower side. The first U-shaped plate (52) on the uppermost side is installed inside the top of the upper cover (1), and the second U-shaped plate (71) on the lowermost side is set inside the bottom of the lower cover (2).

5. The S-shaped finned EGR cooler core structure according to claim 1, characterized in that: The connector includes an auxiliary cylinder (31), which is connected to the outer end of the outer shell (3) and the outer shell (3) and the auxiliary cylinder (31) are integrally formed. The auxiliary cylinder (31) is provided with an outer cylinder (42) at its outer end, and the auxiliary cylinder (31) extends into the outer cylinder (42). The outer cylinder (42) is provided with an mounting plate (4) at its outer end, and the outer cylinder (42) extends to the outer end of the mounting plate (4). The outer cylinder (42) and the mounting plate (4) are integrated into one structure. The mounting plate (4) has two mounting holes (43) recessed inward at its outer end, and the mounting holes (43) penetrate the mounting plate (4). Two nuts (41) are symmetrically arranged at the inner end of the mounting plate (4), and the nuts (41) are connected to the mounting holes (43). The two nuts (41) are located on the upper and lower sides of the housing.

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