Heat exchange type tubular evaporator

Abstract

The utility model belongs to the field of refrigeration equipment, and particularly relates to a heat exchange type tubular evaporator. Comprising an outer shell, a refrigerant outlet, a refrigerant inlet, a liquid inlet and a liquid outlet are formed in the outer shell, tube plates are arranged at the two ends in the outer shell, a plurality of heat exchange pipelines are arranged between the two tube plates, the outer shell comprises an upper shell body, a middle shell body and a lower shell body, and an upper tube plate and a lower tube plate are detachably arranged in the outer shell. A first connecting piece is fixedly arranged at one end of the heat exchange pipeline, the first connecting piece is used for fixing the heat exchange pipeline to the upper tube plate, and the lower tube plate plays a role in supporting the heat exchange pipeline; and internal cleaning and maintenance work are facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of refrigeration equipment, and in particular relates to a heat exchange type tube evaporator. Background Art

[0002] The evaporator plays a key role in the refrigeration system. It uses the heat absorption property of the refrigerant when evaporating to reduce the temperature of the surrounding environment or objects. The liquid refrigerant in the heat exchange copper tube in the evaporator absorbs the heat transferred by the cooling water and evaporates into a low-temperature and low-pressure gaseous refrigerant to leave the evaporator. However, the heat exchange copper tube is usually fixed between the tube sheets at both ends of the evaporator, which is not conducive to cleaning and maintenance of the inside of the evaporator. Utility Model Content

[0003] The purpose of the utility model is to provide a heat exchange tubular evaporator to facilitate internal cleaning and maintenance work in view of the above-mentioned technical problems.

[0004] In view of this, the utility model provides a heat exchange type tube evaporator, including a shell, on which a refrigerant outlet and a refrigerant inlet, as well as a liquid inlet and a liquid outlet are arranged, tube sheets are arranged at both ends of the shell, and a plurality of heat exchange pipes are arranged between the two tube sheets, and also includes: the shell includes an upper shell, a middle shell and a lower shell, and an upper tube sheet and a lower tube sheet are detachably arranged in the shell; a first connecting piece is fixedly arranged at one end of the heat exchange pipe, and the first connecting piece is used to fix the heat exchange pipe to the upper tube sheet; the lower tube sheet supports the heat exchange pipe.

[0005] In the present technical solution, the shell includes a three-section structure, which includes an upper shell, a middle shell and a lower shell from top to bottom. The upper tube sheet and the lower tube sheet are detachably arranged inside the shell. By disassembling the three-section shell and the upper tube sheet and the lower tube sheet, the upper tube sheet and the lower tube sheet and the heat exchange pipe arranged between the tube sheets can be conveniently taken out. A first connecting piece is fixedly arranged at one end of the heat exchange pipe for fixing to the upper tube sheet to prevent the heat exchange pipe from vibrating and rotating during operation, generating noise and causing leakage of refrigerant in the pipe. One end of the heat exchange pipe is connected to the upper tube sheet, and the other end is supported by the lower plate tube. The heat exchange pipe can be disassembled by releasing the connection between the first connecting piece of the heat exchange pipe and the upper tube sheet. When cleaning and inspecting the heat exchange pipe, it is convenient to clean and the heat exchange pipe that needs to be replaced can be replaced separately, thereby reducing the cost of maintenance or replacement and avoiding unnecessary waste.

[0006] In the above technical solution, the upper shell, the middle shell and the lower shell are correspondingly provided with flanges, an upper tube plate is provided between the flange of the upper shell and the flange of the corresponding side of the middle shell, the outer periphery of the upper tube plate is correspondingly provided with threaded holes, and the outer periphery of the upper tube plate is aligned with the flange of the upper shell and the flange of the middle shell, and connected by bolts, and the lower tube plate is arranged in the same manner as the upper tube plate.

[0007] In the present technical solution, the flanges of the outer periphery of the tube sheet and the respective parts of the side shell are fixedly connected by bolts, which can ensure the firmness of the connection between the upper shell, the middle shell and the lower shell, and can also achieve the purpose of quick disassembly by releasing the fixing of the bolts during disassembly.

[0008] In the above technical solution, further, corresponding first support grooves are provided on the upper tube plate corresponding to the plurality of heat exchange pipes, the first support grooves include a first through hole penetrating the upper tube plate, a limiting recess is provided on the side of the first through hole away from the lower tube plate, and the limiting recess is provided with a locking hole.

[0009] In the present technical solution, the side of the heat exchange pipe without a fixed connection to the first connecting piece is inserted from top to bottom into the first through hole of the upper tube plate until the first connecting piece and the limiting recess are matched, and fasteners such as bolts are passed through the first connecting piece and the locking hole to connect, ensuring that the heat exchange pipe will not vibrate or rotate during operation.

[0010] In the above technical solution, further, the lower tube plate is provided with a second through hole corresponding to the first through hole of the upper tube plate, a supporting boss is provided in the second through hole, and other structures of the lower tube plate are consistent with those of the upper tube plate.

[0011] In the present technical solution, the supporting boss is arranged at the lower end of the heat exchange pipe to support the heat exchange pipe, disperse the pressure of the upper tube sheet, and further limit the heat exchange pipe to avoid vibration of the heat exchange pipe during operation. The other structures of the lower tube sheet are consistent with the upper tube sheet, and the multi-step processes of the lower tube sheet and the upper tube sheet are consistent. The same process steps mean that the same equipment and tools can be used, reducing the investment in different materials and processes, thereby reducing production costs. The consistent process helps to maintain the consistency of product quality, reduce quality problems caused by process differences, and improve product reliability and stability.

[0012] In the above technical solution, further, the first connecting member includes a ring plate and an ear block fixedly arranged on the side of the ring plate, the ring plate and one end of the heat exchange pipe are fixedly connected cocentrically, and a fixing hole is arranged on the ear block.

[0013] In the present technical solution, one side of the ring plate is fixedly connected to the heat exchange pipe concentrically. When installing the heat exchange pipe, the ring plate and the ear block are embedded in the limiting recess of the upper tube plate. The limiting recess and the first connecting block have the same shape. The bolts are passed through the fixing holes and the locking holes on the limiting recess to fix the heat exchange pipe effectively and securely.

[0014] In the above technical solution, further, the first through hole of the upper tube plate is provided with a mounting groove, a first sealing ring is provided in the mounting groove, and a second sealing ring is provided on the supporting boss in the lower tube plate.

[0015] In the present technical solution, by setting the first sealing ring and the second sealing ring, the installed heat exchange pipe presses the above sealing rings against the upper tube sheet and the lower tube sheet respectively to ensure the sealing performance and prevent the cooling water passed into the upper tube sheet and the lower tube sheet for heat exchange from leaking from the connection between the heat exchange pipe and the tube sheet. The first sealing ring is limited in the installation groove by the first connecting piece fixedly connected to the end of the heat exchange pipe, and the second sealing ring is fixed by the second connecting piece. The second connecting piece is consistent with the first connecting piece, and the second connecting piece is independent of the heat dissipation pipe. The first connecting piece and the end of the heat exchange pipe are welded, and the parts are unified to facilitate mass production.

[0016] In the above technical solution, further, the heat exchange pipe has straight pipe structures at both ends and a conical structure in the middle. The pipe diameter at the connection with the upper tube sheet is H, and the pipe diameter at the connection with the lower tube sheet is h, and the pipe diameter H>pipe diameter h.

[0017] In this technical solution, by setting the heat exchange pipe with a larger upper part and a smaller lower part, the speed at which the evaporated low-temperature and low-pressure gaseous refrigerant leaves the shell can be accelerated, the evaporation efficiency can be improved, and the refrigeration work can be better performed.

[0018] The beneficial effects of the utility model are:

[0019] 1. The three-section shell is easy to disassemble and inspect and clean the interior. The heat exchange pipe can be disassembled by releasing the connection between the first connector of the heat exchange pipe and the upper tube plate. When cleaning and inspecting the heat exchange pipe, it is easy to clean and the heat exchange pipe that needs to be replaced can be replaced separately, reducing the cost of maintenance or replacement and avoiding unnecessary waste;

[0020] 2. Insert the side of the heat exchange pipe without the first connector fixedly connected into the first through hole of the upper tube plate from top to bottom until the first connector and the limiting recess are matched, and connect them through the first connector and the locking hole with fasteners such as bolts to ensure that the heat exchange pipe will not vibrate or rotate during operation;

[0021] 3. The upper tube sheet and the lower tube sheet, as well as the first connecting piece and the second connecting piece, can use the same equipment and tools, reducing the investment in different materials and processes, thereby reducing production costs. The consistent process helps to maintain the consistency of product quality, reduce quality problems caused by process differences, and improve product reliability and stability;

[0022] 4. By setting up the heat exchange pipe with a large top and a small bottom, the speed at which the evaporated low-temperature and low-pressure gaseous refrigerant leaves the shell can be accelerated, the evaporation efficiency can be improved, and the refrigeration work can be better performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 It is a cross-sectional view of the utility model;

[0025] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 It is a partial cross-sectional view of any heat dissipation pipe and the upper tube plate and the lower tube plate;

[0027] Figure 5 Schematic diagram of the structure of the first connecting member.

[0028] The symbols in the figure are:

[0029] 1. Shell; 2. Refrigerant outlet; 3. Refrigerant inlet; 4. Liquid inlet; 5. Liquid outlet; 6. Heat exchange pipe; 7. Upper shell; 8. Middle shell; 9. Lower shell; 10. Upper tube sheet; 11. Lower tube sheet; 12. First connecting piece; 13. Flanging; 14. Peripheral part; 15. First supporting groove; 16. First through hole; 17. Limiting recess; 18. Locking hole; 19. Second through hole; 20. Supporting boss; 21. Ring plate; 22. Ear block; 23. Fixing hole; 24. Mounting groove; 25. First sealing ring; 26. Second sealing ring; 27. Second connecting piece. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0031] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0033] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0034] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0035] Embodiment 1:

[0036] like Figure 1-5As shown, this embodiment provides a heat exchange type tube evaporator, including a shell 1, on which a refrigerant outlet 2 and a refrigerant inlet 3, as well as a liquid inlet 4 and a liquid outlet 5 are arranged, tube sheets are arranged at both ends of the shell 1, and a plurality of heat exchange pipes 6 are arranged between the two tube sheets, and also includes: the shell 1 includes an upper shell 7, a middle shell 8 and a lower shell 9, and an upper tube sheet 10 and a lower tube sheet 11 are detachably arranged in the shell 1; a first connecting member 12 is fixedly arranged at one end of the heat exchange pipe 6, and the first connecting member 12 is used to fix the heat exchange pipe 6 to the upper tube sheet 10; the lower tube sheet 11 supports the heat exchange pipe 6. The shell 1 includes a three-section structure, which includes an upper shell 7, a middle shell 8 and a lower shell 9 from top to bottom. The upper tube sheet 10 and the lower tube sheet 11 are detachably arranged inside the shell 1. By disassembling the three-section shell 1 and the upper tube sheet 10 and the lower tube sheet 11, the upper tube sheet 10 and the lower tube sheet 11 and the heat exchange pipe 6 arranged between the tube sheets can be conveniently taken out. A first connecting piece 12 is fixedly arranged at one end of the heat exchange pipe 6 for fixing with the upper tube sheet 10 to prevent the heat exchange pipe 6 from vibrating and rotating during operation, generating noise and causing leakage of refrigerant in the pipe. One end of the heat exchange pipe 6 is connected to the upper tube sheet 10, and the other end is supported by the lower plate tube. The heat exchange pipe 6 can be disassembled by releasing the connection between the first connecting piece 12 of the heat exchange pipe 6 and the upper tube sheet 10. When cleaning and inspecting the heat exchange pipe 6, it is convenient to clean and the heat exchange pipe 6 that needs to be replaced can be replaced separately, reducing the cost of maintenance or replacement and avoiding unnecessary waste.

[0037] The working principle of the evaporator in this embodiment is common knowledge and is not the innovation of the present invention, so it will not be described in detail and the baffle is not drawn in the figure.

[0038] like Figure 1-3 As shown, the upper shell 7, the middle shell 8 and the lower shell 9 are provided with flanges 13 correspondingly, and an upper tube sheet 10 is provided between the flanges 13 of the upper shell 7 and the flanges 13 of the corresponding side of the middle shell 8, and the outer periphery 14 of the upper tube sheet 10 is provided with threaded holes correspondingly, and the outer periphery 14 of the upper tube sheet 10 is aligned with the flanges 13 of the upper shell 7 and the flanges 13 of the middle shell 8, and connected by bolts, and the lower tube sheet 11 is provided in the same manner as the upper tube sheet 10. The outer periphery 14 of the tube sheet and the flanges 13 of the respective parts of the side shell are fixedly connected by bolts, which can ensure the firmness of the connection between the upper shell 7, the middle shell 8 and the lower shell 9, and can also achieve the purpose of rapid disassembly by releasing the fixing of the bolts during disassembly.

[0039] like Figure 4As shown, the upper tube sheet 10 is provided with corresponding first support grooves 15 corresponding to a plurality of heat exchange pipes 6, and the first support grooves 15 include first through holes 16 penetrating the upper tube sheet 10, and the first through holes 16 are provided with a limiting recess 17 on the side away from the lower tube sheet 11, and the limiting recess 17 is provided with a locking hole 18. The side of the heat exchange pipe 6 without the fixed connection first connector 12 is inserted from top to bottom into the first through hole 16 of the upper tube sheet 10 until the first connector 12 and the limiting recess 17 are matched, and fasteners such as bolts are passed through the first connector 12 and the locking hole 18 to ensure that the heat exchange pipe 6 will not vibrate or rotate during operation.

[0040] The lower tube sheet 11 is provided with a second through hole 19 corresponding to the first through hole 16 of the upper tube sheet 10, and a supporting boss 20 is provided in the second through hole 19. The other structures of the lower tube sheet 11 are consistent with those of the upper tube sheet 10. The supporting boss 20 is provided at the lower end of the heat exchange pipe 6 to support the heat exchange pipe 6, and while dispersing the pressure of the upper tube sheet 10, it further limits the heat exchange pipe 6 to avoid vibration of the heat exchange pipe 6 during operation. The other structures of the lower tube sheet 11 are consistent with those of the upper tube sheet 10, and the multi-step processes of the lower tube sheet 11 and the upper tube sheet 10 are consistent. The same process steps mean that the same equipment and tools can be used, reducing the investment in different materials and processes, thereby reducing production costs, and consistent processes help maintain the consistency of product quality, reduce quality problems caused by process differences, and improve product reliability and stability.

[0041] like Figure 4 and Figure 5 As shown, the first connecting member 12 includes a ring plate 21 and an ear block 22 fixedly arranged on the side of the ring plate 21. The ring plate 21 is fixedly connected to one end of the heat exchange pipe 6 concentrically, and a fixing hole 23 is provided on the ear block 22. One side of the ring plate 21 is fixedly connected to the heat exchange pipe 6 concentrically. When the heat exchange pipe 6 is installed, the ring plate 21 and the ear block 22 are embedded in the limiting recess 17 of the upper tube plate 10. The limiting recess 17 and the first connecting block have the same shape. The fixing is performed by passing the bolts through the fixing hole 23 and the locking hole 18 on the limiting recess 17, which can effectively and reliably fix the heat exchange pipe 6.

[0042] The first through hole 16 of the upper tube sheet 10 is provided with an installation groove 24, in which a first sealing ring 25 is provided, and a second sealing ring 26 is provided on the supporting boss 20 in the lower tube sheet 11. Through the provision of the first sealing ring 25 and the second sealing ring 26, the installed heat exchange pipe 6 respectively presses the sealing rings against the upper tube sheet 10 and the lower tube sheet 11 to ensure sealing and prevent the cooling water passing through the upper tube sheet 10 and the lower tube sheet 11 for heat exchange from leaking from the connection between the heat exchange pipe 6 and the tube sheet.

[0043] Embodiment 2:

[0044] This embodiment provides a heat exchange tubular evaporator, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0045] like Figure 4 As shown, the heat exchange pipe 6 has a straight pipe structure at both ends and a tapered structure in the middle. The pipe diameter at the connection with the upper tube sheet 10 is H, and the pipe diameter at the connection with the lower tube sheet 11 is h, and the pipe diameter H>pipe diameter h. By setting the heat exchange pipe 6 with a larger top and a smaller bottom, the speed at which the evaporated low-temperature and low-pressure gaseous refrigerant leaves the shell can be accelerated, the evaporation efficiency can be improved, and the refrigeration work can be better performed.

[0046] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A heat exchange type tube evaporator, comprising a shell (1), the shell (1) being provided with a refrigerant outlet (2) and a refrigerant inlet (3), as well as a liquid inlet (4) and a liquid outlet (5), tube sheets being provided at both ends of the shell (1), and a plurality of heat exchange pipes (6) being provided between two of the tube sheets, characterized in that: Also includes: The shell (1) comprises an upper shell (7), a middle shell (8) and a lower shell (9), and an upper tube plate (10) and a lower tube plate (11) are detachably arranged in the shell (1); A first connecting piece (12) is fixedly arranged at one end of the heat exchange pipe (6), and the first connecting piece (12) is used to fix the heat exchange pipe (6) to the upper tube plate (10); The lower tube plate (11) supports the heat exchange pipe (6).

2. A heat exchange tubular evaporator according to claim 1, characterized in that: The upper shell (7), the middle shell (8) and the lower shell (9) are respectively provided with flanges (13); an upper tube plate (10) is provided between the flange (13) of the upper shell (7) and the flange (13) of the middle shell (8); a threaded hole is correspondingly provided on the outer periphery (14) of the upper tube plate (10); the outer periphery (14) of the upper tube plate (10) is aligned with the flange (13) of the upper shell (7) and the flange (13) of the middle shell (8), and they are connected by bolts; the lower tube plate (11) is provided in the same manner as the upper tube plate (10).

3. A heat exchange tubular evaporator according to claim 2, characterized in that: The upper tube plate (10) is provided with corresponding first support grooves (15) corresponding to the plurality of heat exchange pipes (6); the first support groove (15) comprises a first through hole (16) penetrating the upper tube plate (10); a limiting recess (17) is provided on a side of the first through hole (16) away from the lower tube plate (11); and the limiting recess (17) is provided with a locking hole (18).

4. A heat exchange tubular evaporator according to claim 3, characterized in that: The lower tube plate (11) is provided with a second through hole (19) corresponding to the first through hole (16) of the upper tube plate (10), and a supporting boss (20) is provided in the second through hole (19). The other structures of the lower tube plate (11) are consistent with those of the upper tube plate (10).

5. The heat exchange tubular evaporator according to claim 1, characterized in that: The first connecting member (12) comprises a ring plate (21) and an ear block (22) fixedly arranged on the side of the ring plate (21); the ring plate (21) and one end of the heat exchange pipe (6) are fixedly connected cocentrically; and a fixing hole (23) is arranged on the ear block (22).

6. A heat exchange tubular evaporator according to claim 4, characterized in that: The first through hole (16) of the upper tube plate (10) is provided with a mounting groove (24), a first sealing ring (25) is provided in the mounting groove (24), and a second sealing ring (26) is provided on the supporting boss (20) in the lower tube plate (11).

7. A heat exchange tubular evaporator according to claim 6, characterized in that: The heat exchange pipe (6) has straight pipe structures at both ends and a conical structure in the middle. The pipe diameter at the connection with the upper tube plate (10) is H, and the pipe diameter at the connection with the lower tube plate (11) is h, and the pipe diameter H>pipe diameter h.

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