A helical baffle plate heat exchanger and an assembly method thereof

Abstract

The present application relates to the technical field of heat exchangers, and discloses a spiral baffle heat exchanger and an assembly method. The spiral baffle heat exchanger includes a shell, a connecting pipe, a first heat exchange pipe, a second heat exchange pipe, and a spiral baffle. The interior of the shell has a heat exchange chamber, a first medium chamber at both ends of the heat exchange chamber, and a second medium chamber between the heat exchange chamber and the first medium chamber. The spiral baffle is arranged in the heat exchange chamber. The connecting pipe is located in the second medium chamber and is used to connect the first medium chamber and the heat exchange chamber. The first heat exchange pipe is located in the heat exchange chamber and the second medium chamber and is used to connect the two first medium chambers. The second heat exchange pipe is located in the heat exchange chamber and is used to connect the two second medium chambers. The second heat exchange pipe is sleeved outside the first heat exchange pipe and passes through the spiral baffle, so as to form a heat exchange channel between the second heat exchange pipe and the first heat exchange pipe, greatly increasing the heat exchange area between the first heat exchange medium and the second medium, and thus greatly improving the heat exchange efficiency of the spiral baffle heat exchanger.

Description

Technical Field

[0001] This application belongs to the technical field of heat exchangers, and particularly relates to a spiral baffle heat exchanger and an assembly method thereof. Background Art

[0002] A spiral baffle heat exchanger is a heat exchanger that replaces the traditional segmental baffles in the shell side of a shell-and-tube heat exchanger with continuous spiral baffles. Through the spiral baffles, the shell-side fluid flows in a continuous spiral shape, reducing the fluid flow dead zones, ensuring a uniform flow field, thereby improving the heat transfer efficiency, reducing the shell-side resistance, improving the induced vibration, and reducing the structural vibration.

[0003] Currently, the spiral baffle heat exchanger exchanges heat through heat exchange tubes, that is, a high-temperature medium flows inside the heat exchange tubes, and a low-temperature medium flows outside the heat exchange tubes. The high-temperature medium and the low-temperature medium exchange heat under the action of energy transfer through the heat exchange tubes. It can be seen that the diameter of the heat exchange tubes directly affects the heat exchange efficiency. In order to increase the heat exchange efficiency of the spiral baffle heat exchanger, the usual method is to simply reduce the diameter of the heat exchange tubes to increase the number of heat exchange tubes. However, such a setting will reduce the structural strength of the heat exchange tubes, resulting in easy deformation of the heat exchange tubes, thus affecting the service life of the spiral baffle heat exchanger. At the same time, it also increases the assembly difficulty of the spiral baffle heat exchanger, affecting the production efficiency of the spiral baffle heat exchanger, and after the diameter of the heat exchange tubes is reduced, the risk of blockage of the heat exchange tubes is greatly increased. Summary of the Invention

[0004] This application provides a spiral baffle heat exchanger to improve the heat exchange efficiency of the spiral baffle heat exchanger and ensure the service life of the spiral baffle heat exchanger.

[0005] The technical solution adopted in this application is as follows:

[0006] A spiral baffle plate heat exchanger, comprising a shell, a connecting pipe, a first heat exchange pipe, a second heat exchange pipe and a spiral baffle plate. The interior of the shell has a heat exchange chamber, a first medium chamber at both ends of the heat exchange chamber, and a second medium chamber between the heat exchange chamber and the first medium chamber. The spiral baffle plate is arranged in the heat exchange chamber. The connecting pipe is located in the second medium chamber and is used to connect the first medium chamber and the heat exchange chamber. The first heat exchange pipe is located in the heat exchange chamber and the second medium chamber and is used to connect the two first medium chambers. The second heat exchange pipe is located in the heat exchange chamber and is used to connect the two second medium chambers. The second heat exchange pipe is sleeved outside the first heat exchange pipe and passes through the spiral baffle plate, so as to form a heat exchange channel between the second heat exchange pipe and the first heat exchange pipe. The shell is provided with a first medium inlet communicating with one of the first medium chambers, a first medium outlet communicating with the other first medium chamber, a second medium inlet communicating with one of the second medium chambers, and a second medium outlet communicating with the other second medium chamber.

[0007] By adopting the above technical solution, when using the spiral baffle plate heat exchanger in this application, the first medium is injected into the first medium chamber through the first medium inlet, and then the first medium enters one of the first medium chambers. Part of the first medium entering one of the first medium chambers enters the heat exchange chamber through the connecting pipe, and then enters the other first medium chamber. The remaining part of the first medium directly passes through the second medium chamber and the heat exchange chamber through the first heat exchange pipe and enters the other first medium chamber. Finally, the first medium flows out through the first medium outlet. The second medium is injected into the second medium chamber through the second medium inlet, and then the second medium enters one of the second medium chambers. The second medium entering one of the second medium chambers enters the other second medium chamber through the second heat exchange pipe and finally flows out through the second medium outlet.

[0008] However, since both the connecting pipe and the second heat exchange pipe pass through the second medium chamber, the first medium can exchange heat with the second medium in the second medium chamber when the first medium enters the heat exchange chamber through the connecting pipe and when the first medium enters the heat exchange chamber through the first heat exchange pipe. And the second heat exchange pipe is sleeved outside the first heat exchange pipe and forms a heat exchange channel with the first heat exchange pipe. Then, when the second medium flows through the second heat exchange pipe, the first medium flowing into the heat exchange chamber through the connecting pipe exchanges heat with the second medium in the outer circle of the second heat exchange pipe, and the first medium flowing into the inner part of the first heat exchange pipe exchanges heat with the second medium in the inner circle of the second heat exchange pipe, so as to greatly increase the heat exchange area between the first heat exchange medium and the second medium, and further greatly improve the heat exchange efficiency of the spiral baffle plate heat exchanger.

[0009] Moreover, since the first medium flowing through the first heat exchange tube in this application exchanges heat with the second medium in the inner circle of the second heat exchange tube, and the first medium flowing into the heat exchange chamber exchanges heat with the second medium in the outer circle of the second heat exchange tube, it also avoids the situation where the diameter of the heat exchange tube needs to be made smaller in order to improve the heat exchange efficiency of the spiral baffle heat exchanger, thus ensuring the structural strength of the heat exchange tube, increasing the service life of the spiral baffle heat exchanger and reducing the assembly difficulty of the spiral baffle heat exchanger, greatly improving the assembly efficiency of the spiral baffle heat exchanger, and at the same time being able to increase the diameter of the heat exchange tube to a certain extent, greatly avoiding the situation where the heat exchange tube is easily blocked, and prolonging the cleaning cycle required for the spiral baffle heat exchanger.

[0010] Optionally, the housing includes a cylinder body, heads located at both ends of the cylinder body, and a connecting body located between the cylinder body and the heads. A first tube sheet is provided between the head and the connecting body so that the head and the first tube sheet together form the first medium chamber. A second tube sheet is provided between the connecting body and the cylinder body so that the second tube sheet and the cylinder body together form the heat exchange chamber. The first tube sheet, the connecting body, and the second tube sheet together form the second medium chamber.

[0011] By adopting the above technical solution, since the cylinder body and the second tube sheet together form the heat exchange chamber, the head and the first tube sheet together form the first medium chamber, and the first tube sheet, the connecting body, and the second tube sheet together form the second medium chamber, the assembly difficulty of the spiral baffle heat exchanger in this application is greatly reduced, the assembly efficiency of the spiral baffle heat exchanger is greatly improved, and thus the production efficiency of the spiral baffle heat exchanger is greatly improved and the assembly cost of the spiral baffle heat exchanger is greatly reduced.

[0012] Optionally, first positioning and sealing rings are provided on both end faces of the first tube sheet. One of the first positioning and sealing rings extends into the head and abuts against the inner wall of the head, and the other first positioning and sealing ring extends into the connecting body and abuts against the inner wall of the connecting body;

[0013] And / or, second positioning and sealing rings are provided on both end faces of the second tube sheet. One of the second positioning and sealing rings extends into the connecting body and abuts against the inner wall of the connecting body, and the other second positioning and sealing ring extends into the cylinder body and abuts against the inner wall of the cylinder body.

[0014] By adopting the above technical solution, since one of the first positioning and sealing rings extends into the head and abuts against the inner wall of the head, on the one hand, it can achieve the positioning of the head during the installation of the head, so as to reduce the installation difficulty of the head. On the other hand, it can also increase the sealing performance between the first tube sheet and the head, so as to greatly increase the sealing performance of the spiral baffle heat exchanger; the other first positioning and sealing ring extends into the connecting body and abuts against the inner wall of the connecting body. On the one hand, it can achieve the positioning of the first tube sheet during the installation of the first tube sheet, so as to reduce the assembly difficulty of the first tube sheet. On the other hand, it can increase the sealing performance between the first tube sheet and the connecting body, so as to greatly increase the sealing performance of the spiral baffle heat exchanger.

[0015] Since one of the second positioning and sealing rings extends into the cylinder body and abuts against the inner wall of the cylinder body, on the one hand, it can achieve the positioning of the second tube sheet during the installation of the second tube sheet, so as to achieve the effect of facilitating the assembly of the second tube sheet, and then greatly reduce the assembly difficulty of the second tube sheet. On the other hand, it can increase the sealing performance between the second tube sheet and the cylinder body, so as to greatly increase the sealing performance of the spiral baffle heat exchanger; the other second positioning and sealing ring extends into the connecting body. On the one hand, it can achieve the positioning of the connecting body during the installation of the connecting body, so as to greatly reduce the assembly difficulty of the connecting body. On the other hand, it can also increase the sealing performance between the second tube sheet and the connecting body, so as to greatly increase the sealing performance of the spiral baffle heat exchanger.

[0016] Optionally, a limiting ring is provided at one end of each of the communicating pipes, the limiting ring abuts against the inner side of the second tube sheet, and a fixing ring is threadedly connected to the other end of each of the communicating pipes, and the fixing ring abuts against the outer side of the first tube sheet.

[0017] By adopting the above technical solution, since the communicating pipe is used to connect the first medium chamber and the heat exchange chamber, and then the two ends of the communicating pipe are respectively connected to the first tube sheet and the second tube sheet. A limiting ring is provided at one end of the communicating pipe, and the limiting ring abuts against the inner side of the second tube sheet. Then, before assembling the second tube sheet to the end of the cylinder body, the communicating pipe can be installed on the second tube sheet first, so as to greatly reduce the assembly difficulty of the communicating pipe and greatly improve the assembly efficiency of the communicating pipe; and a fixing ring is threadedly connected to the other end of the communicating pipe, and the fixing ring abuts against the outer side of the first tube sheet. Thus, after the first tube sheet is installed in place, the communicating pipe can apply a clamping force to the first tube sheet and the second tube sheet under the action of the limiting ring and the fixing ring. On the one hand, it can increase the sealing performance between the first tube sheet and the second tube sheet and the connecting body. On the other hand, it can also make the communicating pipe in a tensioned state in its own axial direction, so as to greatly reduce the risk of possible deformation of the communicating pipe and extend the service life of the spiral baffle heat exchanger.

[0018] Optionally, the second tube sheet is provided with a communication hole for the communication pipe to pass through. An annular accommodation groove is provided on the hole wall of the communication hole. An elastic ring is arranged in the annular accommodation groove. The elastic ring has a notch so that the elastic ring can elastically deform in its own radial direction. An annular limiting groove for accommodating the elastic ring is provided on the outer peripheral surface of the communication pipe.

[0019] By adopting the above technical solution, when installing the communication pipe on the second tube sheet, first align the end of the communication pipe away from the limiting ring with the communication hole, and then apply a force to the communication pipe to make it approach the second tube sheet. Subsequently, the end of the communication pipe extends into the communication hole, and the end of the communication pipe applies a squeezing force to the elastic ring, so that the elastic ring deforms and sleeves on the outside of the communication pipe. Continue to push the communication pipe and finally make the limiting ring abut against the second tube sheet. At this time, the elastic ring is aligned with the annular limiting groove, and the elastic ring resumes deformation under the action of its own elastic force and snaps into the annular limiting groove, thus completing the installation of the communication pipe on the second tube sheet, avoiding the relative movement between the communication pipe and the first tube sheet when the other end of the communication pipe is installed on the first tube sheet, achieving the effect of facilitating the installation of the communication pipe on the first tube sheet, thereby greatly reducing the assembly difficulty of the communication pipe and greatly improving the assembly efficiency of the communication pipe; moreover, the cooperation of the elastic ring with the annular accommodation groove and the annular limiting groove can also prevent the end of the communication pipe away from the limiting ring from sagging, further reducing the difficulty of assembling the communication pipe to the first tube sheet.

[0020] Optionally, the elastic ring has an outer end located in the annular accommodation groove and an inner end located in the annular limiting groove. The inner end is provided with a guiding surface that can be in guiding cooperation with the end of the communication pipe.

[0021] By adopting the above technical solution, when passing the communication pipe through the communication hole, the end of the communication pipe away from the limiting ring first abuts against the guiding surface, and then continue to push the communication pipe. Subsequently, the elastic ring elastically deforms under the guiding action of the guiding surface, so that the distance between the two opposite walls of the notch increases, and the elastic ring sleeves on the outside of the communication pipe. During this process, since the guiding surface cooperates with the end of the communication pipe, the force required to pass the communication pipe through the communication hole is greatly reduced, greatly reducing the assembly difficulty of the communication pipe and the workload of the staff. At the same time, it also avoids the situation that the elastic ring may deform in its own axial direction or break away from the annular accommodation groove, ensuring that the elastic ring can snap into the annular limiting groove and ensuring the fixing effect of the elastic ring on the communication pipe.

[0022] Optionally, a support body is arranged on the outer peripheral surface of the elastic ring. The support body can elastically support the elastic ring so that the elastic ring is coaxial with the annular accommodation groove.

[0023] By adopting the above technical solution, since the elastic ring needs to undergo elastic deformation, the diameter of the annular placement groove needs to be larger than the diameter of the elastic ring in the state without external force. By providing a support body on the outer peripheral surface of the elastic ring, the support body can elastically support the elastic ring, so that the elastic ring and the annular placement groove are kept coaxial, further achieving the effect of facilitating the penetration of the communication pipe through the communication hole, thereby further reducing the assembly difficulty of the communication pipe; and when the elastic ring deforms under the extrusion of the communication pipe, the support body can deform under the action of the elastic ring to ensure the normal deformation of the elastic ring.

[0024] Optionally, a plurality of the support bodies are arranged at intervals along the circumferential direction of the elastic ring, and each support body includes a connecting section connected to the elastic ring, a support section opposite to the connecting section, and an intermediate section located between the connecting section and the support section, and the thickness of the intermediate section is smaller than the thicknesses of the connecting section and the support section.

[0025] By adopting the above technical solution, since a plurality of the support bodies are arranged at intervals along the circumferential direction of the elastic ring, the supporting effect of the support body on the elastic ring can be ensured, further ensuring that the elastic ring and the annular placement groove are kept coaxial, and the force required for installing the communication pipe to the second tube sheet can be further reduced, greatly reducing the assembly difficulty of the communication pipe, and at the same time making the elastic ring easier to deform; the thickness of the intermediate section is smaller than the thicknesses of the connecting section and the support section, so that the support body can be more easily deformed under the action of the elastic ring on the premise of ensuring the supporting effect of the support body on the elastic ring, avoiding the situation that the extrusion force required for the elastic ring to deform increases due to the setting of the support body.

[0026] Optionally, first clamping rings are threadedly connected to both ends of the first heat exchange tube, and the two first clamping rings respectively abut against the outer sides of the two first tube sheets;

[0027] And / or, second clamping rings are threadedly connected to both ends of the second heat exchange tube, and the two second clamping rings respectively abut against the outer sides of the two second tube sheets.

[0028] By adopting the above technical solution, when installing the first heat exchange tube, first pass one end of the first heat exchange tube through the first tube sheet, the second tube sheet, another second tube sheet and another first tube sheet in sequence, and then install the first clamping ring, so that the first clamping ring is threadedly connected to both ends of the first heat exchange tube and abuts against the outer side of the first tube sheet, thereby reducing the assembly difficulty of the first heat exchange tube. At the same time, the two first clamping rings can apply extrusion force to the two first tube sheets to increase the sealing performance between the first tube sheet and the connecting body, and the first clamping ring can also make the first heat exchange tube in a tensioned state in its own axial direction to ensure the structural strength of the first heat exchange tube, avoid the situation that the first heat exchange tube is prone to bending, and extend the service life of the spiral baffle heat exchanger.

[0029] When installing the second heat exchange tube, first pass one end of the second heat exchange tube through the two second tube sheets, and then install the second clamping ring, so that the second clamping ring is threadedly connected to both ends of the second heat exchange tube and abuts against the outer side of the second tube sheet, thereby reducing the assembly difficulty of the second heat exchange tube. At the same time, the two second clamping rings can apply extrusion force to the two second tube sheets to increase the sealing performance between the second tube sheet and the cylinder body, and the second clamping ring can also make the second heat exchange tube in a tensioned state in its own axial direction to ensure the structural strength of the second heat exchange tube, avoid the situation that the second heat exchange tube is prone to bending, and extend the service life of the spiral baffle heat exchanger.

[0030] The present application also discloses an assembly method of a spiral baffle heat exchanger to reduce the assembly difficulty of the spiral baffle heat exchanger, improve the assembly efficiency of the spiral baffle heat exchanger and reduce the assembly cost of the spiral baffle heat exchanger.

[0031] An assembly method of a spiral baffle heat exchanger for assembling the spiral baffle heat exchanger as described above, which includes the following steps:

[0032] S1. Assemble the connecting pipe, pass the connecting pipe through the second tube sheet so that the elastic ring is clamped into the annular limiting groove;

[0033] S2. Assemble the second tube sheet, install the two second tube sheets at both ends of the cylinder body respectively, so that the second positioning sealing ring on the second tube sheet extends into the cylinder body and abuts against the inner wall of the cylinder body, and the limiting ring is located inside the second tube sheet;

[0034] S3. Assemble the second heat exchange tube, pass the second heat exchange tube through the two second tube sheets, and then threadedly connect the second clamping ring to the end of the second heat exchange tube so that the second clamping ring abuts against the outer side of the second tube sheet;

[0035] S4. Assemble the connection body. Install the two connection bodies on the outer sides of the two second tube sheets respectively, so that the second positioning and sealing rings on the second tube sheets extend into the connection bodies and abut against the inner walls of the connection bodies.

[0036] S5. Assemble the first tube sheet. Install the two first tube sheets on the outer sides of the two connection bodies respectively, so that the first positioning and sealing rings on the first tube sheets extend into the connection bodies and abut against the inner walls of the connection bodies.

[0037] S6. Assemble the first heat exchange tube. Pass the first heat exchange tube through the two first tube sheets, and then thread the first clamping ring onto the end of the first heat exchange tube, so that the first clamping ring abuts tightly against the outer side of the first tube sheet.

[0038] S7. Assemble the head. Install the two heads on the outer sides of the two first tube sheets respectively, so that the first positioning and sealing rings on the first tube sheets extend into the heads and abut against the inner walls of the heads.

[0039] In steps S3 and S6, an additional rod-shaped auxiliary structure is needed to assist the second heat exchange tube to pass through the second tube sheet and assist the first heat exchange tube to pass through the first tube sheet.

[0040] By adopting the above technical solution, assembling the spiral baffle heat exchanger by using the above assembly method can reduce the assembly difficulty of the spiral baffle heat exchanger, improve the assembly efficiency of the spiral baffle heat exchanger and reduce the assembly cost of the spiral baffle heat exchanger. At the same time, it also greatly reduces the workload of the staff.

[0041] Due to adopting the above technical solution, the beneficial effects obtained by this application are as follows:

[0042] 1. The spiral baffle heat exchanger in this application includes a shell, a connecting pipe, a first heat exchange pipe, a second heat exchange pipe, and a spiral baffle. Inside the shell, there are a heat exchange chamber, a first medium chamber at both ends of the heat exchange chamber, and a second medium chamber between the heat exchange chamber and the first medium chamber. The spiral baffle is arranged in the heat exchange chamber. The connecting pipe is located in the second medium chamber and is used to connect the first medium chamber and the heat exchange chamber. The first heat exchange pipe is located in the heat exchange chamber and the second medium chamber and is used to connect the two first medium chambers. The second heat exchange pipe is located in the heat exchange chamber and is used to connect the two second medium chambers. The second heat exchange pipe is sleeved outside the first heat exchange pipe and passes through the spiral baffle, so as to form a heat exchange channel between the second heat exchange pipe and the first heat exchange pipe. Since both the connecting pipe and the second heat exchange pipe pass through the second medium chamber, when the first medium enters the heat exchange chamber through the connecting pipe and when the first medium enters the heat exchange chamber through the first heat exchange pipe, both can exchange heat with the second medium in the second medium chamber. And the second heat exchange pipe is sleeved outside the first heat exchange pipe and forms a heat exchange channel with the first heat exchange pipe. Then when the second medium flows through the second heat exchange pipe, the first medium flowing into the heat exchange chamber through the connecting pipe exchanges heat with the second medium in the inner circle of the second heat exchange pipe, and the first medium flowing into the heat exchange chamber exchanges heat with the second medium in the inner circle of the second heat exchange pipe, so as to greatly increase the heat exchange area between the first heat exchange medium and the second medium, and thus greatly improve the heat exchange efficiency of the spiral baffle heat exchanger. Since the first medium flowing through the first heat exchange pipe exchanges heat with the second medium in the inner circle of the second heat exchange pipe in this application, and the first medium flowing into the heat exchange chamber exchanges heat with the second medium in the outer circle of the second heat exchange pipe, it also avoids the situation that the diameter of the heat exchange pipe needs to be made smaller in order to improve the heat exchange efficiency of the spiral baffle heat exchanger, so as to ensure the structural strength of the heat exchange pipe, increase the service life of the spiral baffle heat exchanger and reduce the assembly difficulty of the spiral baffle heat exchanger, so as to greatly improve the assembly efficiency of the spiral baffle heat exchanger. At the same time, it can also increase the diameter of the heat exchange pipe to a certain extent, so as to greatly avoid the situation that the heat exchange pipe is easily blocked, and extend the cleaning cycle required for the spiral baffle heat exchanger.

[0043] 2. In this application, the shell includes a cylinder body, end heads at both ends of the cylinder body, and a connecting body between the cylinder body and the end heads. A first tube sheet is arranged between the end head and the connecting body, so that the end head and the first tube sheet jointly form the first medium chamber. A second tube sheet is arranged between the connecting body and the cylinder body, so that the second tube sheet and the cylinder body jointly form the heat exchange chamber. The first tube sheet, the connecting body, and the second tube sheet jointly form the second medium chamber, thus greatly reducing the assembly difficulty of the spiral baffle heat exchanger in this application, greatly improving the assembly efficiency of the spiral baffle heat exchanger, further greatly improving the production efficiency of the spiral baffle heat exchanger and greatly reducing the assembly cost of the spiral baffle heat exchanger.

[0044] 3. Both end faces of the first tube sheet in this application are provided with first positioning and sealing rings. One of the first positioning and sealing rings extends into the head and abuts against the inner wall of the head. On the one hand, it can achieve the positioning of the head during the installation of the head, so as to reduce the installation difficulty of the head. On the other hand, it can also increase the sealing performance between the first tube sheet and the head, so as to greatly increase the sealing performance of the spiral baffle heat exchanger. The other first positioning and sealing ring extends into the connecting body and abuts against the inner wall of the connecting body. On the one hand, it can achieve the positioning of the first tube sheet during the installation of the first tube sheet, so as to reduce the assembly difficulty of the first tube sheet. On the other hand, it can increase the sealing performance between the first tube sheet and the connecting body, so as to greatly increase the sealing performance of the spiral baffle heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The drawings described herein are used to provide a further understanding of this application, and constitute a part of this application. The illustrative embodiments of this application and their descriptions are used to explain this application, and do not constitute an improper limitation to this application. In the drawings:

[0046] Figure 1 is a cross-sectional view of the spiral baffle heat exchanger under an embodiment of this application;

[0047] Figure 2 is a schematic structural diagram of the first tube sheet under an embodiment of this application;

[0048] Figure 3 is a schematic structural diagram of the second tube sheet under an embodiment of this application;

[0049] Figure 4 is a schematic connection structure diagram of the connecting pipe, the first heat exchange tube, and the second heat exchange tube with the first tube sheet and the second tube sheet under an embodiment of this application;

[0050] Figure 5 is Figure 4 an enlarged view of part A in

[0051] Figure 6 is Figure 4 an enlarged view of part B in

[0052] Figure 7 is a schematic structural diagram of the heat exchange tube under an embodiment of this application;

[0053] Figure 8 is a schematic structural diagram of the elastic ring under an embodiment of this application;

[0054] Figure 9 is a flowchart of the steps of the assembly method in an embodiment of this application.

[0055] Reference numerals:

[0056] 1. Shell; 11. Cylinder; 12. Head; 121. First tube sheet; 122. First positioning seal ring; 123. First medium inlet; 124. First medium outlet; 13. Connecting body; 131. Second tube sheet; 132. Second positioning seal ring; 133. Annular accommodating groove; 134. Elastic ring; 135. Notch; 136. Guide surface; 137. Support body; 138. Second medium inlet; 139. Second medium outlet; 14. Heat exchange chamber; 15. First medium chamber; 16. Second medium chamber; 2. Connecting pipe; 21. Limit ring; 22. Fixed ring; 23. Annular limit groove; 3. First heat exchange tube; 31. First clamping ring; 4. Second heat exchange tube; 41. Second clamping ring; 5. Spiral baffle plate. Detailed implementation manners

[0057] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail by way of examples in combination with the drawings of the specification.

[0058] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that, without conflict, the embodiments of the present application and the features in each embodiment may be combined with each other.

[0059] In addition, in the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0060] In the present application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0061] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] Referring to Figures 1 to 8 , a spiral baffle plate heat exchanger is disclosed, which includes a housing 1, a connecting pipe 2, a first heat exchange pipe 3, a second heat exchange pipe 4, and a spiral baffle plate 5. The housing 1 has a heat exchange chamber 14 inside, a first medium chamber 15 at both ends of the heat exchange chamber 14, and a second medium chamber 16 between the heat exchange chamber 14 and the first medium chamber 15. The spiral baffle plate 5 is arranged in the heat exchange chamber 14. The connecting pipe 2 is located in the second medium chamber 16 and is used to connect the first medium chamber 15 and the heat exchange chamber 14. The first heat exchange pipe 3 is located in the heat exchange chamber 14 and the second medium chamber 16 and is used to connect the two first medium chambers 15. The second heat exchange pipe 4 is located in the heat exchange chamber 14 and is used to connect the two second medium chambers 16. The second heat exchange pipe 4 is sleeved outside the first heat exchange pipe 3 and passes through the spiral baffle plate 5, so as to form a heat exchange channel between the second heat exchange pipe 4 and the first heat exchange pipe 3. The housing 1 is provided with a first medium inlet 123 communicated with one of the first medium chambers 15, a first medium outlet 124 communicated with the other first medium chamber 15, a second medium inlet 138 communicated with one of the second medium chambers 16, and a second medium outlet 139 communicated with the other second medium chamber 16.

[0063] Specifically, the housing 1 has a first end and a second end opposite to the first end. The first medium inlet 123 is arranged at the first end, the first medium outlet 124 is arranged at the second end, the second medium inlet 138 is arranged at the bottom of the housing 1 and close to the second end, and the second medium outlet 139 is arranged at the top of the housing 1 and close to the first end. A plurality of through holes are provided on the spiral baffle plate 5, so that the first medium entering the heat exchange chamber 14 can flow along the spiral direction of the spiral baffle plate 5 and can also directly pass through the through holes.

[0064] When using the spiral baffle plate heat exchanger in this application, the first medium is injected into the first medium chamber 15 through the first medium inlet 123. Then, the first medium enters one of the first medium chambers 15. A part of the first medium that enters one of the first medium chambers 15 enters the heat exchange chamber 14 through the connecting pipe 2, and then enters another first medium chamber 15. The remaining part of the first medium directly passes through the second medium chamber 16 and the heat exchange chamber 14 through the first heat exchange pipe 3 and enters another first medium chamber 15. Finally, the first medium flows out through the first medium outlet 124. The second medium is injected into the second medium chamber 16 through the second medium inlet 138. Then, the second medium enters one of the second medium chambers 16. The second medium that enters one of the second medium chambers 16 enters another second medium chamber 16 through the second heat exchange pipe 4 and finally flows out through the second medium outlet 139.

[0065] However, since both the connecting pipe 2 and the second heat exchange pipe 4 pass through the second medium chamber 16, when the first medium enters the heat exchange chamber 14 through the connecting pipe 2 and when the first medium enters the heat exchange chamber 14 through the first heat exchange pipe 3, both can exchange heat with the second medium in the second medium chamber 16. And the second heat exchange pipe 4 is sleeved outside the first heat exchange pipe 3 and forms a heat exchange channel with the first heat exchange pipe 3. Then, when the second medium flows through the second heat exchange pipe 4, the first medium flowing to the heat exchange chamber 14 through the connecting pipe 2 exchanges heat with the second medium in the outer circle of the second heat exchange pipe 4, and the first medium flowing into the first heat exchange pipe 3 exchanges heat with the second medium in the inner circle of the second heat exchange pipe 4, so as to greatly increase the heat exchange area between the first medium and the second medium, and thus greatly improve the heat exchange efficiency of the spiral baffle plate heat exchanger.

[0066] Moreover, since the first medium flowing through the first heat exchange pipe 3 in this application exchanges heat with the second medium in the inner circle of the second heat exchange pipe 4, and the first medium flowing to the heat exchange chamber 14 exchanges heat with the second medium in the outer circle of the second heat exchange pipe 4, it also avoids the situation where the diameter of the heat exchange pipe needs to be made smaller in order to improve the heat exchange efficiency of the spiral baffle plate heat exchanger, thus ensuring the structural strength of the heat exchange pipe, increasing the service life of the spiral baffle plate heat exchanger and reducing the assembly difficulty of the spiral baffle plate heat exchanger, greatly improving the assembly efficiency of the spiral baffle plate heat exchanger. At the same time, it can also increase the diameter of the heat exchange pipe to a certain extent, greatly avoiding the situation where the heat exchange pipe is easily blocked, and prolonging the cleaning cycle required for the spiral baffle plate heat exchanger.

[0067] In a preferred embodiment, referring to Figure 1, the housing 1 includes a cylindrical body 11, end caps 12 located at both ends of the cylindrical body 11, and a connecting body 13 located between the cylindrical body 11 and the end caps 12. A first tube sheet 121 is provided between the end cap 12 and the connecting body 13 so that the end cap 12 and the first tube sheet 121 together form a first medium chamber 15. A second tube sheet 131 is provided between the connecting body 13 and the cylindrical body 11 so that the second tube sheet 131 and the cylindrical body 11 together form a heat exchange chamber 14. The first tube sheet 121, the connecting body 13, and the second tube sheet 131 together form a second medium chamber 16.

[0068] It can be understood that both ends of the connecting pipe 2 are respectively connected to the first tube sheet 121 and the second tube sheet 131. Both ends of the first heat exchange tube 3 are respectively connected to the two first tube sheets 121 and pass through the two second tube sheets 131. Both ends of the second heat exchange tube 4 are respectively connected to the two second tube sheets 131. The first medium inlet 123 and the first medium outlet 124 are respectively provided on the two end caps 12, and the second medium inlet 138 and the second medium outlet 139 are respectively provided on the two connecting bodies 13.

[0069] Since the cylindrical body 11 and the second tube sheet 131 together form the heat exchange chamber 14, the end cap 12 and the first tube sheet 121 together form the first medium chamber 15, and the first tube sheet 121, the connecting body 13, and the second tube sheet 131 together form the second medium chamber 16, the assembly difficulty of the spiral baffle plate heat exchanger in this application is greatly reduced, the assembly efficiency of the spiral baffle plate heat exchanger is greatly improved, the production efficiency of the spiral baffle plate heat exchanger is greatly improved, and the assembly cost of the spiral baffle plate heat exchanger is greatly reduced.

[0070] Specifically, the cylindrical body 11 and the connecting body 13 are fixedly connected by a flange and a bolt pair, and the two can apply an extrusion force to the second tube sheet 131 to realize the fixed connection of the cylindrical body 11, the connecting body 13, and the second tube sheet 131. The connecting body 13 and the end cap 12 are also fixedly connected by a flange and a bolt pair, and the two can apply an extrusion force to the first tube sheet 121 to realize the fixed connection of the connecting body 13, the end cap 12, and the first tube sheet 121. And sealing rings are provided between the cylindrical body 11 and the second tube sheet 131, the second tube sheet 131 and the connecting body 13, the connecting body 13 and the first tube sheet 121, and the first tube sheet 121 and the end cap 12 to ensure the sealing performance of the spiral baffle plate heat exchanger.

[0071] In a preferred embodiment, refer to Figure 1 and Figure 2, first positioning sealing rings 122 are provided on both end surfaces of the first tube sheet 121, one of the first positioning sealing rings 122 extends into the head cover 12 and contacts the inner wall of the head cover 12, which can, on the one hand, realize the positioning of the head cover 12 when installing it, so as to reduce the difficulty of installing the head cover 12, and on the other hand, can also increase the sealing between the first tube sheet 121 and the head cover 12, so as to greatly increase the sealing of the spiral baffle heat exchanger; the other first positioning sealing ring 122 extends into the connecting body 13 and contacts the inner wall of the connecting body 13, which can, on the one hand, realize the positioning of the first tube sheet 121 when installing it, so as to reduce the difficulty of assembling the first tube sheet 121, and on the other hand, can increase the sealing between the first tube sheet 121 and the connecting body 13, so as to greatly increase the sealing of the spiral baffle heat exchanger.

[0072] In a preferred embodiment, referring to Figure 1 and Figure 3 , second positioning sealing rings 132 are provided on both end surfaces of the second tube sheet 131, one of the second positioning sealing rings 132 extends into the connecting body 13 and contacts the inner wall of the connecting body 13, on the one hand, it can realize the positioning of the connecting body 13 when the connecting body 13 is installed, so as to greatly reduce the difficulty of assembling the connecting body 13, and on the other hand, it can also increase the sealing between the second tube sheet 131 and the connecting body 13, so as to greatly increase the sealing of the spiral baffle heat exchanger; the other second positioning sealing ring 132 extends into the cylinder 11 and contacts the inner wall of the cylinder 11, on the one hand, it can realize the positioning of the second tube sheet 131 when the second tube sheet 131 is installed, so as to achieve the effect of facilitating the assembly of the second tube sheet 131, thereby greatly reducing the difficulty of assembling the second tube sheet 131, and on the other hand, it can increase the sealing between the second tube sheet 131 and the cylinder 11, so as to greatly increase the sealing of the spiral baffle heat exchanger.

[0073] The present application does not specifically limit the installation method of the connecting pipe 2. Preferably, refer to Figures 4 to 7 A limiting ring 21 is provided at one end of the connecting pipe 2, and the limiting ring 21 is pressed against the inner side of the second tube sheet 131. The other end of the connecting pipe 2 is threadedly connected with a fixing ring 22, and the fixing ring 22 is pressed against the outer side of the first tube sheet 121.

[0074] It should be noted that the inner side of the first tube sheet 121 mentioned in the present application refers to the side of the first tube sheet 121 facing the cylinder 11, and the outer side of the first tube sheet 121 refers to the side of the first tube sheet 121 away from the cylinder 11; the inner side of the second tube sheet 131 refers to the side of the second tube sheet 131 facing the cylinder 11, and the outer side of the second tube sheet 131 refers to the side of the second tube sheet 131 away from the cylinder 11.

[0075] Specifically, a sealing ring sleeving the communicating pipe 2 is arranged between the limiting ring 21 and the second tube sheet 131. That is to say, the limiting ring 21 abuts against the inner side of the second tube sheet 131 through the sealing ring to increase the sealing performance between the two; a sealing ring sleeving the communicating pipe 2 is arranged between the fixing ring 22 and the first tube sheet 121. That is to say, the fixing ring 22 abuts against the outer side of the first tube sheet 121 through the sealing ring to increase the sealing performance between the two.

[0076] Since the communicating pipe 2 is used to connect the first medium chamber 15 and the heat exchange chamber 14, the two ends of the communicating pipe 2 are respectively connected to the first tube sheet 121 and the second tube sheet 131. A limiting ring 21 is arranged at one end of the communicating pipe 2, and the limiting ring 21 abuts against the inner side of the second tube sheet 131. Then, before assembling the second tube sheet 131 to the end of the cylinder body 11, the communicating pipe 2 can be installed on the second tube sheet 131 first, so as to greatly reduce the assembly difficulty of the communicating pipe 2 and greatly improve the assembly efficiency of the communicating pipe 2; and a fixing ring 22 is threadedly connected to the other end of the communicating pipe 2, and the fixing ring 22 abuts against the outer side of the first tube sheet 121. Thus, after the first tube sheet 121 is installed in place, the communicating pipe 2 can apply a clamping force to the first tube sheet 121 and the second tube sheet 131 under the action of the limiting ring 21 and the fixing ring 22. On the one hand, it can increase the sealing performance between the first tube sheet 121 and the second tube sheet 131 and the connecting body 13, and on the other hand, it can also make the communicating pipe 2 in a tensioned state in its own axial direction, so as to greatly reduce the risk of possible deformation of the communicating pipe 2 and extend the service life of the spiral baffle heat exchanger.

[0077] Preferably, an operation hole is arranged on the fixing ring 22, so that the staff can insert a screwing tool into the operation hole to rotate the fixing ring 22, so as to greatly improve the installation efficiency of the fixing ring 22 and increase the abutting effect between the fixing ring 22 and the first tube sheet 121 at the same time.

[0078] Further, referring to Figures 4 to 8 , the second tube sheet 131 is provided with a communicating hole for the communicating pipe 2 to pass through. An annular accommodating groove 133 is arranged on the hole wall of the communicating hole, and an elastic ring 134 is arranged in the annular accommodating groove 133. The elastic ring 134 has a notch 135, so that the elastic ring 134 can elastically deform in its own radial direction. An annular limiting groove 23 for accommodating the elastic ring 134 is arranged on the outer peripheral surface of the communicating pipe 2.

[0079] When installing the connecting pipe 2 on the second tube sheet 131, first align the end of the connecting pipe 2 away from the limiting ring 21 with the communication hole, then apply a force to the connecting pipe 2 to move it closer to the second tube sheet 131, so that the end of the connecting pipe 2 extends into the communication hole, and the end of the connecting pipe 2 applies an extrusion force to the elastic ring 134, causing the elastic ring 134 to deform and sleeve on the outside of the connecting pipe 2. Continue to push the connecting pipe 2 until the limiting ring 21 abuts tightly against the second tube sheet 131. At this time, the elastic ring 134 is aligned with the annular limiting groove 23, and the elastic ring 134 restores its deformation under the action of its own elastic force and snaps into the annular limiting groove 23, thus completing the installation of the connecting pipe 2 on the second tube sheet 131, avoiding the relative movement between the connecting pipe 2 and the first tube sheet 121 when the other end of the connecting pipe 2 is installed on the first tube sheet 121, achieving the effect of facilitating the installation of the connecting pipe 2 on the first tube sheet 121, thereby greatly reducing the assembly difficulty of the connecting pipe 2 and greatly improving the assembly efficiency of the connecting pipe 2. Moreover, the cooperation between the elastic ring 134, the annular accommodating groove 133 and the annular limiting groove 23 can also prevent the end of the connecting pipe 2 away from the limiting ring 21 from sagging, further reducing the difficulty of assembling the connecting pipe 2 to the first tube sheet 121.

[0080] Furthermore, referring to Figure 8 , the elastic ring 134 has an outer end located in the annular accommodating groove 133 and an inner end located in the annular limiting groove 23, and the inner end is provided with a guiding surface 136 that can be in guiding cooperation with the end of the connecting pipe 2.

[0081] When passing the connecting pipe 2 through the communication hole, the end of the connecting pipe 2 away from the limiting ring 21 first abuts against the guiding surface 136, and then continue to push the connecting pipe 2, so that the elastic ring 134 undergoes elastic deformation under the guiding action of the guiding surface 136, increasing the distance between the two wall surfaces of the notch 135 opposite to each other. The elastic ring 134 sleeves on the outside of the connecting pipe 2. During this process, the cooperation between the guiding surface 136 and the end of the connecting pipe 2 greatly reduces the force required to pass the connecting pipe 2 through the communication hole, greatly reducing the assembly difficulty of the connecting pipe 2 and the workload of the staff, and at the same time avoiding the situation that the elastic ring 134 may deform axially or break away from the annular accommodating groove 133, ensuring that the elastic ring 134 can snap into the annular limiting groove 23 and ensuring the fixing effect of the elastic ring 134 on the connecting pipe 2.

[0082] Furthermore, referring to Figure 5 and Figure 8 , a support body 137 is provided on the outer peripheral surface of the elastic ring 134, and the support body 137 can elastically support the elastic ring 134 to keep the elastic ring 134 coaxial with the annular accommodating groove 133.

[0083] Since the elastic ring 134 needs to undergo elastic deformation, the diameter of the annular placement groove 133 needs to be larger than the diameter of the elastic ring 134 in the state without external force. By providing a support body 137 on the outer peripheral surface of the elastic ring 134, the support body 137 can elastically support the elastic ring 134, so that the elastic ring 134 and the annular placement groove 133 are kept coaxial, further achieving the effect of facilitating the passage of the communication pipe 2 through the communication hole, thereby further reducing the assembly difficulty of the communication pipe 2. When the elastic ring 134 deforms under the extrusion of the communication pipe 2, the support body 137 can deform under the action of the elastic ring 134 to ensure the normal deformation of the elastic ring 134.

[0084] This application does not specifically limit the structure of the support body 137. Preferably, referring to Figure 5 and Figure 8 , a plurality of support bodies 137 are arranged at intervals along the circumferential direction of the elastic ring 134, which can ensure the supporting effect of the support body 137 on the elastic ring 134, further ensure the coaxial state of the elastic ring 134 and the annular placement groove 133, and can further reduce the force required for installing the communication pipe 2 to the second tube sheet 131, greatly reducing the assembly difficulty of the communication pipe 2, and at the same time making the elastic ring 134 easier to deform. The support body 137 includes a connecting section connected to the elastic ring 134, a supporting section opposite to the connecting section, and an intermediate section located between the connecting section and the supporting section. The thickness of the intermediate section is smaller than the thickness of the connecting section and the supporting section, which can make the support body 137 easier to deform under the action of the elastic ring 134 on the premise of ensuring the supporting effect of the support body 137 on the elastic ring 134, so as to avoid the situation that the extrusion force required for the elastic ring 134 to deform increases due to the setting of the support body 137.

[0085] Preferably, the intermediate section is provided with exhaust holes to make the support body 137 easier to deform, and the support body 137 is made of rubber or silica gel material.

[0086] In other embodiments, the support body 137 can also be an annular structure that is circumferentially closed along the elastic ring 134.

[0087] In other embodiments, the communication pipe 2 can also be connected to the first tube sheet 121 and the second tube sheet 131 by means of welding and fixing.

[0088] This application does not specifically limit the installation method of the first heat exchange tube 3. Preferably, referring to Figure 4 and Figure 6 , first clamping rings 31 are threadedly connected to both ends of the first heat exchange tube 3, and the two first clamping rings 31 are respectively abutted against the outer sides of the two first tube sheets 121.

[0089] It is understandable that a sealing ring sleeving on the first heat exchange tube 3 is arranged between the first clamping ring 31 and the first tube sheet 121. That is to say, the first clamping ring 31 abuts against the outer side of the first tube sheet 121 through the sealing ring to increase the sealing performance between the two.

[0090] When installing the first heat exchange tube 3, first pass one end of the first heat exchange tube 3 through the first tube sheet 121, the second tube sheet 131, another second tube sheet 131 and another first tube sheet 121 in sequence, and then install the first clamping ring 31 to make the first clamping ring 31 threadedly connected to both ends of the first heat exchange tube 3 and abut against the outer side of the first tube sheet 121. Thereby, the assembly difficulty of the first heat exchange tube 3 is reduced. At the same time, the two first clamping rings 31 can apply extrusion force to the two first tube sheets 121 to increase the sealing performance between the first tube sheet 121 and the connecting body 13. And the first clamping ring 31 can also make the first heat exchange tube 3 in a tensioned state in its own axial direction to ensure the structural strength of the first heat exchange tube 3, avoid the situation that the first heat exchange tube 3 is prone to bending, and prolong the service life of the spiral baffle heat exchanger.

[0091] In addition, when installing the first heat exchange tube 3, the length of the first heat exchange tube 3 exposed outside the first tube sheet 121 can also be adjusted to facilitate passing the first heat exchange tube 3 through another first tube sheet 121, thus greatly reducing the assembly difficulty of the first heat exchange tube 3.

[0092] Preferably, the first clamping ring 31 is provided with an operation hole like the fixing ring 22, so that the staff can use a screwing tool to insert into the operation hole to rotate the first clamping ring 31, which greatly improves the installation efficiency of the first clamping ring 31 and can also increase the abutting effect between the first clamping ring 31 and the first tube sheet 121.

[0093] In other embodiments, the first heat exchange tube 3 can also be fixedly connected to the two first tube sheets 121 by means of welding.

[0094] This application does not specifically limit the installation method of the second heat exchange tube 4. Preferably, referring to Figure 4 and Figure 6 , both ends of the second heat exchange tube 4 are threadedly connected with second clamping rings 41, and the two second clamping rings 41 respectively abut against the outer sides of the two second tube sheets 131.

[0095] It is understandable that a sealing ring sleeving on the second heat exchange tube 4 is arranged between the second clamping ring 41 and the second tube sheet 131. That is to say, the second clamping ring 41 abuts against the outer side of the second tube sheet 131 through the sealing ring to increase the sealing performance between the two.

[0096] When installing the second heat exchange tube 4, first pass one end of the second heat exchange tube 4 through the two second tube sheets 131 in sequence, and then install the second clamping ring 41, so that the second clamping ring 41 is threadedly connected to both ends of the second heat exchange tube 4 and abuts against the outer side of the second tube sheet 131. Thereby, the assembly difficulty of the second heat exchange tube 4 is reduced. At the same time, the two second clamping rings 41 can apply an extrusion force to the two second tube sheets 131 to increase the sealing performance between the second tube sheet 131 and the cylinder body 11. And the second clamping ring 41 can also keep the second heat exchange tube 4 in a tensioned state in its own axial direction to ensure the structural strength of the second heat exchange tube 4 and avoid the situation that the second heat exchange tube 4 is prone to bending, so as to extend the service life of the spiral baffle heat exchanger.

[0097] In addition, when installing the second heat exchange tube 4, the length of the second heat exchange tube 4 exposed outside the second tube sheet 131 can also be adjusted, so as to pass the second heat exchange tube 4 through another second tube sheet 131, thereby greatly reducing the assembly difficulty of the second heat exchange tube 4.

[0098] Preferably, the second clamping ring 41 is provided with an operation hole like the fixing ring 22, so that the operator can insert a screwing tool into the operation hole to rotate the second clamping ring 41, thereby greatly improving the installation efficiency of the second clamping ring 41 and increasing the abutting effect between the second clamping ring 41 and the second tube sheet 131.

[0099] In other embodiments, the second heat exchange tube 4 can also be fixedly connected to the two second tube sheets 131 by welding.

[0100] Refer to Figure 9 , the present application also discloses an assembly method of a spiral baffle heat exchanger, which is used to assemble the spiral baffle heat exchanger as described above, and includes the following steps:

[0101] S1. Assemble the connecting pipe 2, pass the connecting pipe 2 through the second tube sheet 131, so that the elastic ring 134 is snapped into the annular limiting groove 23.

[0102] S2. Assemble the second tube sheet 131, install the two second tube sheets 131 at both ends of the cylinder body 11 respectively, so that the second positioning sealing ring 132 on the second tube sheet 131 extends into the cylinder body 11 and abuts against the inner wall of the cylinder body 11, and make the limiting ring 21 located inside the second tube sheet 131.

[0103] S3. Assemble the second heat exchange tube 4, pass the second heat exchange tube 4 through the two second tube sheets 131, and then threadedly connect the second clamping ring 41 to the end of the second heat exchange tube 4, so that the second clamping ring 41 abuts against the outer side of the second tube sheet 131.

[0104] S4. Assemble the connecting body 13, and install the two connecting bodies 13 on the outer sides of the two second tube sheets 131 respectively, so that the second positioning and sealing ring 132 on the second tube sheet 131 extends into the connecting body 13 and abuts against the inner wall of the connecting body 13.

[0105] S5. Assemble the first tube sheet 121, and install the two first tube sheets 121 on the outer sides of the two connecting bodies 13 respectively, so that the first positioning and sealing ring 122 on the first tube sheet 121 extends into the connecting body 13 and abuts against the inner wall of the connecting body 13. Then, pass the end of the connecting pipe 2 away from the limit ring 21 through the first tube sheet 121, and then thread the fixing ring 22 onto the connecting pipe 2 and tighten it against the outer side of the first tube sheet 121.

[0106] S6. Assemble the first heat exchange tube 3, pass the first heat exchange tube 3 through one of the first tube sheets 121, the two second tube sheets 131, and the other first tube sheet 121 in sequence, and then thread the first clamping ring 31 onto the end of the first heat exchange tube 3 so that the first clamping ring 31 abuts tightly against the outer side of the first tube sheet 121.

[0107] S7. Assemble the head 12, and install the two heads 12 on the outer sides of the two first tube sheets 121 respectively, so that the first positioning and sealing ring 122 on the first tube sheet 121 extends into the head 12 and abuts against the inner wall of the head 12.

[0108] In steps S3 and S6, an additional rod-shaped auxiliary structure is needed to assist the second heat exchange tube 4 to pass through the second tube sheet 131 and assist the first heat exchange tube 3 to pass through the first tube sheet 121. That is, before installing the two second tube sheets 131 at both ends of the cylinder body 11, align the two second tube sheets 131 with both ends of the cylinder body 11 first, and then insert the rod-shaped auxiliary structure into the corresponding through holes of the second tube sheet 131, and at the same time make the rod-shaped auxiliary structure pass through the cylinder body 11, and then install the second tube sheet 131 at the end of the cylinder body 11. When installing the second heat exchange tube 4, pass the second heat exchange tube 4 outside the rod-shaped auxiliary structure so that the rod-shaped auxiliary structure guides the second heat exchange tube 4 to pass through the two second tube sheets 131, greatly reducing the assembly difficulty of the second tube sheet 131. When installing the first tube sheet 121, also make the first tube sheet 121 pass through a plurality of rod-shaped auxiliary structures, and then when installing the first heat exchange tube 3, pass the first heat exchange tube 3 outside the rod-shaped auxiliary structure so that the rod-shaped auxiliary structure guides the first heat exchange tube 3 to pass through the first tube sheet 121 and the second tube sheet 131, so as to greatly reduce the assembly difficulty of the first heat exchange tube 3.

[0109] In step S5, an additional expansion tensioning auxiliary structure is required to assist in tightening the fixing ring 22; that is, when tightening the fixing ring 22, the expansion tensioning auxiliary structure needs to be inserted into the connecting pipe 2 so that the connecting pipe 2 remains stationary under the action of the expansion tensioning auxiliary structure, to avoid the situation where the connecting pipe 2 rotates following the fixing ring 22 during the process of screwing the fixing ring 22, thereby improving the installation efficiency of the fixing ring 22 and increasing the tightening effect between the fixing ring 22 and the first tube sheet 121.

[0110] The expansion tensioning auxiliary structure can be a chuck structure or other structures that can be inserted into the interior of the connecting pipe 2 and can be tightened against the inner wall of the heat exchange tube.

[0111] By using the assembly method in this application to assemble the spiral baffle heat exchanger, the assembly difficulty of the spiral baffle heat exchanger can be reduced, the assembly efficiency of the spiral baffle heat exchanger can be improved, the assembly cost of the spiral baffle heat exchanger can be reduced, and at the same time, the workload of the staff can be greatly reduced.

[0112] What is not described in this application can be realized by adopting or referring to the existing technology.

[0113] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0114] The above are only the embodiments of this application and are not used to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

1. A spiral baffle heat exchanger, characterized in that: The invention comprises a shell (1), a connecting pipe (2), a first heat exchange pipe (3), a second heat exchange pipe (4) and a spiral baffle (5); the shell (1) has a heat exchange cavity (14), first medium cavities (15) located at both ends of the heat exchange cavity (14) and a second medium cavity (16) located between the heat exchange cavity (14) and the first medium cavity (15); the spiral baffle (5) is arranged in the heat exchange cavity (14); the connecting pipe (2) is located in the second medium cavity (16) and is used to connect the first medium cavity (15) and the heat exchange cavity (14); the first heat exchange pipe (3) is located in the heat exchange cavity (14) and the second medium cavity (16) and is used to connect the two first medium cavities (15); The second heat exchange tube (4) is located in the heat exchange cavity (14) and is used to connect the two second medium cavities (16). The second heat exchange tube (4) is sleeved on the outside of the first heat exchange tube (3) and penetrates the spiral baffle (5) so that a heat exchange channel is formed between the second heat exchange tube (4) and the first heat exchange tube (3). The shell (1) is provided with a first medium inlet (123) connected to one of the first medium cavities (15), a first medium outlet (124) connected to the other first medium cavity (15), a second medium inlet (138) connected to one of the second medium cavities (16), and a second medium outlet (139) connected to the other second medium cavity (16).

2. The spiral baffle heat exchanger according to claim 1, characterized in that: The shell (1) comprises a cylinder (11), a head (12) located at both ends of the cylinder (11), and a connecting body (13) located between the cylinder (11) and the head (12); a first tube sheet (121) is arranged between the head (12) and the connecting body (13), so that the head (12) and the first tube sheet (121) together form the first medium cavity (15); a second tube sheet (131) is arranged between the connecting body (13) and the cylinder (11), so that the second tube sheet (131) and the cylinder (11) together form the heat exchange cavity (14); and the first tube sheet (121), the connecting body (13) and the second tube sheet (131) together form the second medium cavity (16).

3. The spiral baffle heat exchanger according to claim 2, characterized in that: First positioning sealing rings (122) are provided on both end surfaces of the first tube sheet (121), one of the first positioning sealing rings (122) extends into the end cap (12) and contacts the inner wall of the end cap (12), and the other first positioning sealing ring (122) extends into the connecting body (13) and contacts the inner wall of the connecting body (13); And / or, second positioning sealing rings (132) are provided on both end surfaces of the second tube sheet (131), one of the second positioning sealing rings (132) extends into the connecting body (13) and abuts against the inner wall of the connecting body (13), and the other second positioning sealing ring (132) extends into the cylinder (11) and abuts against the inner wall of the cylinder (11).

4. The spiral baffle heat exchanger according to claim 2, characterized in that: A limiting ring (21) is provided at one end of the connecting tube (2), and the limiting ring (21) is pressed against the inner side of the second tube sheet (131). The other end of the connecting tube (2) is threadedly connected with a fixing ring (22), and the fixing ring (22) is pressed against the outer side of the first tube sheet (121).

5. The spiral baffle heat exchanger according to claim 4, characterized in that: The second tube sheet (131) is provided with a connecting hole for the connecting tube (2) to pass through, the hole wall of the connecting hole is provided with an annular receiving groove (133), an elastic ring (134) is provided in the annular receiving groove (133), the elastic ring (134) has a notch (135) so that the elastic ring (134) can be elastically deformed in its own radial direction, and the outer peripheral surface of the connecting tube (2) is provided with an annular limiting groove (23) for accommodating the elastic ring (134).

6. The spiral baffle heat exchanger according to claim 5, characterized in that: The elastic ring (134) has an outer end located in the annular receiving groove (133) and an inner end located in the annular limiting groove (23), and the inner end is provided with a guide surface (136) capable of guiding and cooperating with the end of the connecting pipe (2).

7. The spiral baffle heat exchanger according to claim 5, characterized in that: A support body (137) is provided on the outer peripheral surface of the elastic ring (134), and the support body (137) can elastically support the elastic ring (134) so ​​that the elastic ring (134) and the annular receiving groove (133) maintain a coaxial state.

8. The spiral baffle heat exchanger according to claim 7, characterized in that: A plurality of support bodies (137) are arranged at intervals along the circumference of the elastic ring (134), and the support body (137) includes a connecting section connected to the elastic ring (134), a supporting section opposite to the connecting section, and an intermediate section located between the connecting section and the supporting section, wherein the thickness of the intermediate section is smaller than the thickness of the connecting section and the supporting section.

9. The spiral baffle heat exchanger according to claim 2, characterized in that: Both ends of the first heat exchange tube (3) are threadedly connected with first clamping rings (31), and the two first clamping rings (31) are respectively pressed against the outer sides of the two first tube sheets (121); And / or, both ends of the second heat exchange tube (4) are threadedly connected with second clamping rings (41), and the two second clamping rings (41) are respectively pressed against the outer sides of the two second tube sheets (131).

10. A method for assembling a spiral baffle heat exchanger, characterized in that: For assembling a spiral baffle heat exchanger as described in any one of claims 1 to 9, comprising the following steps: S1, assembling the connecting pipe (2), and passing the connecting pipe (2) through the second tube plate (131) so that the elastic ring (134) is inserted into the annular limiting groove (23); S2, assembling the second tube sheet (131), and installing the two second tube sheets (131) at the two ends of the cylinder (11) respectively, so that the second positioning sealing ring (132) on the second tube sheet (131) extends into the cylinder (11) and contacts the inner wall of the cylinder (11), and the limiting ring (21) is located on the inner side of the second tube sheet (131); S3, assembling the second heat exchange tube (4), passing the second heat exchange tube (4) through the two second tube sheets (131), and then threading the second clamping ring (41) to the end of the second heat exchange tube (4), so that the second clamping ring (41) is tightly pressed against the outer side of the second tube sheet (131); S4, assembling the connecting body (13), installing the two connecting bodies (13) on the outer sides of the two second tube sheets (131) respectively, so that the second positioning sealing ring (132) on the second tube sheet (131) extends into the connecting body (13) and contacts the inner wall of the connecting body (13); S5, assembling the first tube sheet (121), and installing the two first tube sheets (121) on the outer sides of the two connecting bodies (13) respectively, so that the first positioning sealing ring (122) on the first tube sheet (121) extends into the connecting body (13) and contacts the inner wall of the connecting body (13); S6, assembling the first heat exchange tube (3), passing the first heat exchange tube (3) through the two first tube sheets (121), and then threading the first clamping ring (31) to the end of the first heat exchange tube (3), so that the first clamping ring (31) is tightly pressed against the outer side of the first tube sheet (121); S7, assembling the head (12), and installing the two head covers (12) on the outer sides of the two first tube sheets (121) respectively, so that the first positioning sealing ring (122) on the first tube sheet (121) extends into the head cover (12) and contacts the inner wall of the head cover (12); In steps S3 and S6, an additional rod-shaped auxiliary structure is required to assist the second heat exchange tube (4) to pass through the second tube sheet (131) and assist the first heat exchange tube (3) to pass through the first tube sheet (121).

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