Primary surface heat exchanger

Abstract

The utility model belongs to the technical field of heat exchangers, and particularly relates to a primary surface heat exchanger which comprises a first cover plate and a second cover plate, at least two overlapped heat exchange units are arranged between the first cover plate and the second cover plate, and the heat exchange units are respectively communicated with a primary side inlet, a primary side outlet, a secondary side inlet and a secondary side outlet. Each heat exchange unit comprises a first S-shaped corrugated forming plate, an L-shaped sealing strip and a second S-shaped corrugated forming plate which are sequentially connected from top to bottom, a plurality of first positioning columns are arranged on the upper surface of the L-shaped sealing strip, and a plurality of positioning grooves are formed in the lower surface of the L-shaped sealing strip. The lower surface of the first S-shaped corrugated forming plate is provided with a plurality of positioning grooves fixedly embedded with the first positioning columns on the upper surface of the L-shaped sealing strip, and the upper surface of the second S-shaped corrugated forming plate is provided with a plurality of first positioning columns fixedly embedded with the positioning grooves on the lower surface of the L-shaped sealing strip. The heat exchange unit can be accurately positioned and is convenient to install and weld, and automatic production of the primary surface heat exchanger is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and in particular relates to a primary surface heat exchanger. Background Art

[0002] A surface heat exchanger separates the cold and hot fluids with a solid wall so that the two do not contact each other, and the heat is transferred from the hot fluid to the cold fluid through the wall.

[0003] Prior art CN115790216A discloses a primary surface heat exchanger and a method of using the same, comprising a cover plate A and a cover plate B, wherein a stacked heat exchange unit is provided between the cover plate A and the cover plate B, and a transverse supporting corrugated plate is provided between adjacent heat exchange units; the prior art can directly exchange heat between the heat exchange medium on the wall surface of the S-shaped curved flow channel on both sides of the corrugated plate, with a small pressure drop of the medium and high heat exchange efficiency, and the heat exchanger and its components are standardized and modularized, which is conducive to realizing fully automated production and reducing production costs; the prior art has the problem of inconvenient positioning during welding, and therefore further improvements are made on the basis of the prior art. Utility Model Content

[0004] In order to solve the technical problem: how to accurately position the heat exchange unit when installing the primary surface heat exchanger and improve the automated production of the primary surface heat exchanger.

[0005] The utility model provides the following technical solutions:

[0006] A primary surface heat exchanger comprises a cover plate 1 and a cover plate 2, at least two heat exchange units are arranged between the cover plate 1 and the cover plate 2, the heat exchange units are stacked together, and the heat exchange units are respectively connected with a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet. The heat exchange unit comprises an S-shaped corrugated forming plate 1, an L-shaped closing strip, and an S-shaped corrugated forming plate 2 which are sequentially connected from top to bottom, a plurality of first positioning columns are arranged on the upper surface of the L-shaped closing strip, a plurality of positioning grooves are arranged on the lower surface of the L-shaped closing strip, a plurality of positioning grooves which are embedded and fixed with the first positioning columns on the upper surface of the L-shaped closing strip are arranged on the lower surface of the S-shaped corrugated forming plate 1, and a plurality of first positioning columns which are embedded and fixed with the positioning grooves on the lower surface of the L-shaped closing strip are arranged on the upper surface of the S-shaped corrugated forming plate 2.

[0007] Furthermore, the heat exchange units are integrally connected via an I-type closing strip, a plurality of first positioning columns are provided on the upper surface of the I-type closing strip, a plurality of positioning grooves are provided on the lower surface of the I-type closing strip, a plurality of first positioning columns are provided on the upper surface of the S-type corrugated forming plate 1 and are engaged and fixed with the positioning grooves on the lower surface of the I-type closing strip, and a plurality of positioning grooves are provided on the lower surface of the S-type corrugated forming plate 2 and are engaged and fixed with the first positioning columns on the upper surface of the I-type closing strip.

[0008] Furthermore, the heat exchange unit also includes a longitudinal supporting corrugated plate, on which at least two positioning holes are arranged, and the longitudinal supporting corrugated plate is sleeved on a plurality of second positioning columns arranged at two ends of the S-shaped corrugated forming plate through its own positioning holes.

[0009] Furthermore, the primary surface heat exchanger also includes a transverse supporting corrugated plate, on which at least two positioning holes are arranged, and the transverse supporting corrugated plate is sleeved on a plurality of second positioning columns arranged at one end and another end of the S-shaped corrugated forming plate through its own positioning holes.

[0010] Furthermore, a line connecting at least two second positioning posts is close to the S-shaped corrugated area, and a line connecting the two second positioning posts is parallel to an edge of the S-shaped corrugated area.

[0011] Further, several primary side outlets are connected as a primary side total outlet, and a detection hole 1 is provided on the primary side total outlet; and / or, several secondary side outlets are connected as a secondary side total outlet, and a detection hole 2 is provided on the secondary side total outlet.

[0012] Furthermore, both the detection hole 1 and the detection hole 2 are provided with detachable plugs.

[0013] Further, several primary side inlets are connected as a primary side total inlet, the outer surface of the edge of the primary side total outlet is a curved surface, and the outer surface of the edge of the primary side total inlet is a curved surface; and / or, several secondary side inlets are connected as a secondary side total inlet, the outer surface of the edge of the secondary side total inlet is a curved surface, and the outer surface of the edge of the secondary side total outlet is a curved surface.

[0014] Furthermore, the outer surface of the edge of the outer side surface of the cover plate 1 is a curved surface, and the outer surface of the edge of the outer side surface of the cover plate 2 is a curved surface.

[0015] Furthermore, a plurality of lines are arranged on the outer surface of the cover plate 1 away from the heat exchange unit, and a plurality of lines are arranged on the outer surface of the cover plate 2 away from the heat exchange unit.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] When the S-shaped corrugated molded plate 1 and the S-shaped corrugated molded plate 2 of the primary surface heat exchanger of the utility model are connected to the L-shaped closing strip, the positioning columns on the upper surface of the L-shaped closing strip are embedded and fixed with the positioning grooves on the lower surface of the S-shaped corrugated molded plate 1, and the positioning grooves on the lower surface of the L-shaped closing strip are embedded and fixed with several positioning columns on the upper surface of the S-shaped corrugated molded plate 2, so that the interior of the heat exchange unit can be accurately positioned, which is convenient for installation and welding, and improves the automated production of the primary surface heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the overall structure of a primary surface heat exchanger according to an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structural decomposition of a primary surface heat exchanger of an embodiment of the utility model, omitting the primary side total inlet, primary side total outlet, secondary side total inlet, and secondary side total outlet;

[0020] Figure 3 This is a schematic diagram of the heat exchange unit structure of an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the heat exchange unit structure decomposition of an embodiment of the utility model;

[0022] Figure 5 This is a structural schematic diagram of an S-shaped corrugated profiled plate according to an embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the second structure of the S-shaped corrugated forming plate of an embodiment of the utility model;

[0024] Figure 7 This is a schematic diagram of the longitudinal support corrugated plate structure of an embodiment of the utility model;

[0025] Figure 8 This is a schematic diagram of the structure of the transversely supported corrugated plate according to an embodiment of the utility model;

[0026] Fig. 9 This is a schematic diagram of the L-shaped sealing strip structure of an embodiment of the utility model;

[0027] Fig.10 This is a schematic diagram of the I-type sealing strip structure of an embodiment of the utility model;

[0028] Fig.11 This is a schematic diagram of the primary side total outlet structure of an embodiment of the utility model;

[0029] Fig.12 This is a schematic diagram of the secondary side total outlet structure of an embodiment of the utility model;

[0030] Fig.13 This is a schematic diagram of the external structure of a cover plate 1 according to an embodiment of the utility model;

[0031] Reference numerals:

[0032] 1. Primary side total outlet; 2. Secondary side total inlet; 3. Cover plate 1; 4. Cover plate 2; 5. Heat exchange unit; 6. Horizontal support corrugated plate; 7. Primary side total inlet; 8. I-type closing strip; 9. Closing strip corresponding area; 10. Support corrugation corresponding area; 11. Primary side outlet; 12. S-type corrugated forming plate 1; 13. S-type corrugated forming plate 2; 14. Longitudinal support corrugated plate; 15. L-type closing strip; 16. Primary side inlet; 17. Flat plate; 18. Second positioning column; 19. Positioning hole; 20. Secondary side total outlet; 21. Detection hole 1; 22. Detection hole 2; 23. First positioning column. DETAILED DESCRIPTION

[0033] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of the utility model.

[0034] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0035] Combination Figure 1 , Figure 2 As shown, the utility model provides a primary surface heat exchanger, including a cover plate 1 3 and a cover plate 2 4, between which are arranged more than one heat exchange unit 5 aligned and stacked together, and each heat exchange unit 5 is provided with a transverse supporting corrugated plate 6 at both ends.

[0036] The heat exchange unit 5 is respectively connected with a primary side inlet 16, a primary side outlet 11, a secondary side inlet, and a secondary side outlet. The primary side inlet 16 is arranged at the front side of the heat exchanger and close to the right top corner, the primary side outlet 11 is arranged at the rear side of the heat exchanger and close to the left top corner, the secondary side inlet is arranged at the left end of the heat exchanger, and the secondary side outlet is arranged at the right end of the heat exchanger.

[0037] Combination Figure 3 , Figure 4 As shown, the heat exchange unit 5 includes an S-shaped corrugated molding plate 1 12 and an S-shaped corrugated molding plate 2 13 connected up and down. The phase difference between the S-shaped corrugations of the S-shaped corrugated molding plate 2 13 and the S-shaped corrugated molding plate 1 12 is 120°-240°. After the S-shaped corrugated molding plate 2 13 and the S-shaped corrugated molding plate 1 12 are superimposed, the corrugations are in a cross state, which is convenient for modular installation and production of the heat exchange unit, thereby improving production efficiency.

[0038] Combination Figure 3 , Figure 4 As shown, the S-shaped corrugated forming plate 2 13 and the S-shaped corrugated forming plate 1 12 are both rectangular designs of the same size, and the middle parts of the S-shaped corrugated forming plate 2 13 and the S-shaped corrugated forming plate 1 12 are both provided with S-shaped corrugated areas, and the outer edge shape of the S-shaped corrugated area is a parallelogram.

[0039] like Figure 5 or Figure 6 As shown, the smooth areas around the S-shaped corrugated area are all flat areas 17. The entire S-shaped corrugated forming plate 12 and the S-shaped corrugated forming plate 2 13 have only two areas and can be formed in one step. The flat area 17 is composed of a support plate installation area and a sealing strip installation area. Figure 4 As shown, the support plate installation area is two triangular flat plate areas surrounded by the two ends of the S-shaped corrugated area and the outer edge of the S-shaped corrugated forming plate. The triangular flat plate area is used to place the support plate. The support plate adopts a straight corrugated plate with a simple processing technology. The closing strip installation area is the flat plate area at the edge of the triangular flat plate area and the S-shaped corrugated area, which is used to install the closing strip.

[0040] The thickness of the S-type corrugated forming plate 2 13 and the S-type corrugated forming plate 1 12 is amm, the thickness of the flat area 17 is bmm, the distance from the top of the flat area 17 to the top of the S-type corrugated area is a / 2mm, and the lateral corrugation phase difference between the S-type corrugated forming plate 2 13 and the S-type corrugated forming plate 1 12 is 180°. When the S-type corrugated forming plate 2 13 and the S-type corrugated forming plate 1 12 are close to each other, all the corrugations are in a cross state and support each other to avoid deformation of the corrugated plate under the action of the fluid medium.

[0041] Combination Figure 3 , Figure 4 As shown, the heat exchange unit 5 further includes a longitudinal support corrugated plate 14. When the S-shaped corrugated forming plate 2 13 and the S-shaped corrugated forming plate 1 12 are connected, the longitudinal support corrugated plate 14 is set at two support plate installation areas of the S-shaped corrugated forming plate 2 13 as a support plate.

[0042] like Figure 7 As shown, the longitudinal supporting corrugated plate 14 is a straight corrugation in the longitudinal direction, and the corrugation thickness is (ab) mm. The longitudinal supporting corrugated plate 14 plays the role of supporting the S-shaped corrugated profiled plate 12.

[0043] Combination Figure 3 , Figure 4As shown, the heat exchange unit 5 further includes an L-shaped sealing strip 15, and two L-shaped sealing strips 15 are installed in the sealing strip installation area of ​​the second S-shaped corrugated molding plate 13, and the vertex angles of the two L-shaped sealing strips 15 are symmetrically arranged at the two vertices of the second S-shaped corrugated molding plate 13. The long side of the L-shaped sealing strip 15 is shorter than the long side of the second S-shaped corrugated molding plate 13, and the inner long side of the L-shaped sealing strip 15 is stuck at the longitudinal outer edge of the S-shaped corrugated area of ​​the second S-shaped corrugated molding plate 13, and the inner short side of the L-shaped sealing strip 15 and the transverse outer edge of the S-shaped corrugated area of ​​the second S-shaped corrugated molding plate 13 form a triangular area.

[0044] The outer sides of the two L-shaped sealing strips 15 are sealed with the outer edges of the flat plate areas of the S-shaped corrugated forming plate 13 and the S-shaped corrugated forming plate 1 12 by welding, forming a heat exchange unit 5 having a primary side inlet 16 and a primary side outlet 11. The longitudinal straight corrugations of the two longitudinal supporting corrugated plates 14 are connected to the primary side inlet 16 and the primary side outlet 11, respectively, to improve the production efficiency of the heat exchanger. The L-shaped sealing strip 15 makes the flat plate areas of the S-shaped corrugated forming plate 1 12 and the S-shaped corrugated forming plate 2 13 fit closely, the welding parts are simple to combine, the weld is a straight line, and it is easy to use an automated welding process.

[0045] like Figure 1 As shown, the adjacent heat exchange units 5 are close to each other, and the outer edges of the middle S-shaped corrugated areas between the two overlap each other. The longitudinal ends of the heat exchange unit 5 are provided with I-shaped sealing strips 8, and the I-shaped sealing strips 8 are tightly fitted with the upper and lower S-shaped corrugated plate flat areas. The welding parts are simple to combine, and the welds are straight lines, which are easy to use automated welding processes. In addition, the longitudinal ends of the heat exchange unit 5 are fixedly sealed, and a transverse supporting corrugated plate 6 is respectively provided at the transverse ends of the heat exchange unit 5. Figure 8 As shown, the transverse supporting corrugated sheet 6 is straight corrugated in the transverse direction.

[0046] After the heat exchange units 5 are stacked, the transverse straight corrugations of the two transverse supporting corrugated plates 6 are connected to the secondary side inlet and the secondary side outlet respectively. The corrugation thickness of the transverse supporting corrugated plates 6 is (ab) mm. The transverse supporting corrugated plates 6 play the role of supporting the two heat exchange units 5, so that a secondary side heat exchange inlet and a secondary side outlet are formed between the two heat exchange units 5; the transverse supporting corrugated plates 6 play the role of filling the supporting flat plate area 17, and guide the fluid medium at the secondary side inlet and outlet to flow into or out of the middle S-shaped corrugated area.

[0047] Combination Figure 1 , 2 As shown, on the side where the cover plate 1 3 and the cover plate 2 4 contact the heat exchange unit 5 , the cover plate 1 3 and the cover plate 2 4 are both provided with an S-shaped corrugation corresponding area, a sealing strip corresponding area 9 and a supporting corrugation corresponding area 10 .

[0048] The S-shaped corrugation corresponding area of ​​the cover plate 3 is embedded in the S-shaped corrugation area of ​​the S-shaped corrugated forming plate 12, the closing strip corresponding area 9 of the cover plate 3 is embedded in the I-shaped closing strip 8 above the S-shaped corrugated forming plate 12, and the supporting corrugation corresponding area 10 of the cover plate 3 is embedded in the lateral supporting corrugated plate 6 above the S-shaped corrugated forming plate 12.

[0049] The S-shaped corrugation corresponding area of ​​the cover plate 2 4 is embedded in the S-shaped corrugation area of ​​the S-shaped corrugated forming plate 2 13, the closing strip corresponding area 9 of the cover plate 2 4 is embedded in the I-shaped closing strip 8 below the S-shaped corrugated forming plate 2 13, and the supporting corrugation corresponding area 10 of the cover plate 2 4 is embedded in the horizontal supporting corrugated plate 6 below the S-shaped corrugated forming plate 2 13. The cover plates 1 3 and 2 4 are completely fitted with the heat exchange unit 5, which is convenient for heat exchange and improves the heat exchange efficiency.

[0050] like Figure 1 As shown, the primary inlets 16 of the multiple heat exchange units 5 are aggregated and sealed by pipes to form the primary total inlet 7 of the heat exchanger; the primary outlets 11 of the heat exchange units 5 are aggregated and sealed by pipes to form the primary total outlet 1 of the heat exchanger; the secondary inlets of the heat exchange units 5 are aggregated and sealed by pipes to form the secondary total inlet 2 of the heat exchanger; the secondary outlets of the heat exchange units 5 are aggregated and sealed by pipes to form the secondary total outlet 20 of the heat exchanger. Pipes are welded to the outside of the primary total inlet 7, the primary outlet 11, the secondary total inlet 2 and the secondary total outlet 20 to facilitate heat exchange and improve heat exchange efficiency.

[0051] As a preferred embodiment, in order to facilitate rapid positioning of the primary surface heat exchanger during welding, in this embodiment,

[0052] like Figure 5 As shown, a plurality of second positioning columns 18 are provided on the support plate installation area of ​​the S-shaped corrugated forming plate 12. Figure 8 As shown, a plurality of positioning holes 19 are provided on the transverse supporting corrugated plate 6, and the transverse supporting corrugated plate 6 is sleeved on the second positioning posts 18 of the S-shaped corrugated forming plate 12 through its own positioning holes 19, so as to facilitate accurate positioning of the transverse supporting corrugated plate 6 during welding. The connecting line of at least two second positioning posts 18 on the S-shaped corrugated forming plate 12 is close to the S-shaped corrugated area of ​​the S-shaped corrugated forming plate 12, and the connecting line of the two second positioning posts 18 is parallel to the edge of the S-shaped corrugated area of ​​the S-shaped corrugated forming plate 12.

[0053] like Figure 6 As shown, a plurality of second positioning columns 18 are also provided on the support plate installation area of ​​the S-shaped corrugated forming plate 13. Figure 7As shown, a plurality of positioning holes 19 are also provided on the longitudinal supporting corrugated plate 14, and the longitudinal supporting corrugated plate 14 is sleeved on the second positioning posts 18 on the second S-shaped corrugated forming plate 13 through its own positioning holes 19, so as to facilitate accurate positioning of the longitudinal supporting corrugated plate 14 during welding. The connecting line of at least two second positioning posts 18 on the second S-shaped corrugated forming plate 13 is close to the S-shaped corrugated area of ​​the second S-shaped corrugated forming plate 13, and the connecting line of the two second positioning posts 18 is parallel to the edge of the S-shaped corrugated area on the second S-shaped corrugated forming plate 13.

[0054] A plurality of first positioning columns 23 and positioning grooves are arranged on the surfaces of the L-shaped closing strip 15, the S-shaped corrugated forming plate 1 12, the S-shaped corrugated forming plate 2 13 and the I-shaped closing strip 8. The accompanying drawings only illustrate the first positioning columns 23, while the positioning grooves are not illustrated in the drawings.

[0055] Specifically, Fig. 9 As shown, a plurality of first positioning columns 23 are provided on the upper surface of the L-shaped closing strip 15, and a plurality of positioning grooves are provided on the lower surface of the L-shaped closing strip 15; a plurality of positioning grooves cooperating with the first positioning columns 23 on the upper surface of the L-shaped closing strip 15 are provided on the lower surface of the closing strip installation area of ​​the S-shaped corrugated forming plate 12, such as Figure 6 As shown, a plurality of first positioning posts 23 are provided on the upper surface of the closing strip installation area of ​​the S-shaped corrugated forming plate 13 to be engaged and fixed with the positioning grooves on the lower surface of the L-shaped closing strip 15 .

[0056] Preferably, when sealing welding is required, the L-shaped closing strip 15 can be engaged with the S-shaped corrugated forming plate 1 12 and the S-shaped corrugated forming plate 2 13 through the first positioning column 23 and the convex and concave positioning groove, so that the L-shaped closing strip 15 and the S-shaped corrugated forming plate 1 12 and the S-shaped corrugated forming plate 2 13 can be accurately positioned and fit more closely, which is convenient for installation and welding.

[0057] like Fig.10 As shown, a plurality of first positioning posts 23 are provided on the upper surface of the I-shaped sealing strip 8, and a plurality of positioning grooves are provided on the lower surface of the I-shaped sealing strip; Figure 5 As shown, a plurality of first positioning posts 23 are arranged on the upper surface of the closing strip installation area of ​​the S-shaped corrugated forming plate 12, which cooperate with the positioning grooves on the lower surface of the I-shaped closing strip 8; and a positioning groove is arranged on the lower surface of the closing strip installation area of ​​the S-shaped corrugated forming plate 2 13, which cooperate with the first positioning posts 23 on the upper surface of the I-shaped closing strip 8.

[0058] When sealing welding is required, the I-type closing strip 8 can also be engaged with the S-type corrugated forming plate 1 12 and the S-type corrugated forming plate 2 13 through the first positioning column 23 and the convex and concave positioning groove, so that the I-type closing strip 8 and the S-type corrugated forming plate 1 12 and the S-type corrugated forming plate 2 13 can be accurately positioned and tightly fitted, which is convenient for installation and welding.

[0059] Therefore, by providing a plurality of first positioning columns 23 and positioning grooves on the L-shaped closing strip 15, the I-shaped closing strip 8, the S-shaped corrugated forming plate 1 12, and the S-shaped corrugated forming plate 2 13, the positioning accuracy of the entire primary surface heat exchanger during installation is improved, which facilitates automated production.

[0060] How it works

[0061] 1) Install the primary surface heat exchanger of this embodiment to the heat exchange pipeline;

[0062] 2) The first heat exchange medium evenly enters the primary side inlet 16 of the heat exchange unit 5, and then evenly enters the longitudinal supporting corrugated plate 14 of the primary side of the heat exchange unit 5. Under the corrugated guiding action in the heat exchange unit 5, the first heat exchange medium evenly flows through the triangular area at one end of the heat exchange unit 5, the middle S-shaped corrugated area and the triangular area at the other end, and exchanges heat with the second heat exchange medium of the adjacent layer of heat exchange unit 5, and finally flows out from the longitudinal supporting corrugated plate 14 at the other end of the heat exchange unit 5, and then flows out from the primary side outlet 11 of the heat exchange unit 5. When the medium performs heat exchange work, the medium flowing out of all heat exchange units 5 is collected and flows out;

[0063] At the same time, the second heat exchange medium evenly enters the secondary side inlet of the heat exchange unit 5, and then evenly enters the transverse supporting corrugated plate 6 between the heat exchange units 5. Under the action of the corrugated guide, it flows through the triangular area at one end, the S-shaped corrugated area between the two heat exchange units 5 and the triangular area at the other end, exchanges heat with the first heat exchange medium of the aforementioned heat exchange unit 5, and finally flows out from the transverse supporting corrugated plate 6 at the other end of the heat exchange unit 5 respectively, and finally flows out from the secondary side outlet.

[0064] As a preferred embodiment, Fig.11 As shown, a detection hole 21 is provided on the left or right side of the primary side total outlet 1, and a detection instrument is connected to the detection hole 21 through a pipeline to detect whether the second heat exchange medium is mixed into the first heat exchange medium at any time; Fig.12 As shown, a second detection hole 22 is provided on the left or right side of the secondary side total outlet 20. The second detection hole 22 is connected to a detection instrument through a pipeline so as to detect whether the second heat exchange medium is mixed with the first heat exchange medium at any time. The detection hole 1 21 and the detection hole 22 are used to detect in real time whether the primary surface heat exchanger of this embodiment has a heat exchange medium leakage.

[0065] More preferably, detection hole 1 21 is located on the left side of the primary side total outlet 1 , and detection hole 2 22 is located on the left side of the secondary side total outlet 20 , or detection hole 1 21 is located on the right side of the primary side total outlet 1 , and detection hole 2 22 is located on the right side of the secondary side total outlet 20 .

[0066] As a preferred embodiment, a plurality of lines are arranged on the outer surfaces of cover plate 1 3 and cover plate 2 4 which are not in contact with heat exchange unit 5 to increase the friction force when contacting cover plate 1 3 and cover plate 2 4 during transportation, so as to facilitate loading and unloading.

[0067] like Fig.13 As shown, the outer surfaces of the edges of the outer side surfaces of the cover plate 1 3 and the cover plate 2 4 are arranged as curved surfaces to reduce the stress concentration of the primary surface heat exchanger of this embodiment.

[0068] The outer surfaces of the external edges of the primary side total outlet 1 and the primary side total inlet 7, as well as the outer surfaces of the external edges of the secondary side total inlet 2 and the secondary side total outlet 20 can be set to a curved surface to improve the safety of the primary surface heat exchanger of this embodiment.

[0069] The above technical features constitute the best implementation example of the present utility model, which has strong adaptability and best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the needs of different situations.

[0070] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A primary surface heat exchanger, comprising a cover plate 1 and a cover plate 2, at least two heat exchange units are arranged between the cover plate 1 and the cover plate 2, the heat exchange units are stacked together, and the heat exchange units are respectively connected with a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet, characterized in that: The heat exchange unit includes an S-shaped corrugated forming plate 1, an L-shaped closing strip, and an S-shaped corrugated forming plate 2 which are connected in sequence from top to bottom. A plurality of first positioning columns are arranged on the upper surface of the L-shaped closing strip, and a plurality of positioning grooves are arranged on the lower surface of the L-shaped closing strip. A plurality of positioning grooves which are embedded and fixed with the first positioning columns on the upper surface of the L-shaped closing strip are arranged on the lower surface of the S-shaped corrugated forming plate 1, and a plurality of first positioning columns which are embedded and fixed with the positioning grooves on the lower surface of the L-shaped closing strip are arranged on the upper surface of the S-shaped corrugated forming plate 2.

2. The primary surface heat exchanger according to claim 1, characterized in that: The heat exchange units are integrally connected via an I-type closing strip, a plurality of first positioning posts are arranged on the upper surface of the I-type closing strip, a plurality of positioning grooves are arranged on the lower surface of the I-type closing strip, a plurality of first positioning posts are arranged on the upper surface of the S-type corrugated forming plate 1 and are engaged and fixed with the positioning grooves on the lower surface of the I-type closing strip, and a plurality of positioning grooves are arranged on the lower surface of the S-type corrugated forming plate 2 and are engaged and fixed with the first positioning posts on the upper surface of the I-type closing strip.

3. The primary surface heat exchanger according to claim 1, characterized in that: The heat exchange unit also includes a longitudinal supporting corrugated plate, on which at least two positioning holes are arranged, and the longitudinal supporting corrugated plate is sleeved on a plurality of second positioning columns arranged at two ends of the S-shaped corrugated forming plate through its own positioning holes.

4. The primary surface heat exchanger according to claim 1, characterized in that: The primary surface heat exchanger also includes a transverse supporting corrugated plate, which is provided with at least two positioning holes. The transverse supporting corrugated plate is sleeved on a plurality of second positioning columns provided at one end and another end of the S-shaped corrugated forming plate through its own positioning holes.

5. The primary surface heat exchanger according to claim 3 or 4, characterized in that: A line connecting at least two second positioning posts is close to the S-shaped corrugated area, and a line connecting the two second positioning posts is parallel to an edge of the S-shaped corrugated area.

6. The primary surface heat exchanger according to any one of claims 1 to 4, characterized in that: A plurality of primary side outlets are connected as a primary side total outlet, and a detection hole 1 is arranged on the primary side total outlet; and / or a plurality of secondary side outlets are connected as a secondary side total outlet, and a detection hole 2 is arranged on the secondary side total outlet.

7. The primary surface heat exchanger according to claim 6, characterized in that Both the detection hole 1 and the detection hole 2 are provided with detachable plugs.

8. The primary surface heat exchanger according to claim 6, characterized in that: Several primary side inlets are connected as a primary side total inlet, the outer surface of the edge of the primary side total outlet is a curved surface, and the outer surface of the edge of the primary side total inlet is a curved surface; and / or, several secondary side inlets are connected as a secondary side total inlet, the outer surface of the edge of the secondary side total inlet is a curved surface, and the outer surface of the edge of the secondary side total outlet is a curved surface.

9. The primary surface heat exchanger according to any one of claims 1 to 4, characterized in that: The outer surface of the edge of the outer side surface of the cover plate 1 is a curved surface, and the outer surface of the edge of the outer side surface of the cover plate 2 is a curved surface.

10. The primary surface heat exchanger according to any one of claims 1 to 4, characterized in that: A plurality of lines are arranged on the outer surface of the cover plate 1 away from the heat exchange unit, and a plurality of lines are arranged on the outer surface of the cover plate 2 away from the heat exchange unit.

Images