Falling film type heat exchanger for magnetic suspension heat pump

Abstract

The utility model discloses a falling film type heat exchanger for a magnetic suspension heat pump, which belongs to the field of magnetic suspension heat pumps and comprises a heat exchanger shell and an end cover, the heat exchanger shell is vertically arranged, a liquid outlet is arranged at the bottom of the heat exchanger shell, a steam inlet is arranged above one side of the heat exchanger shell, and a steam outlet is arranged above the other side of the heat exchanger shell. Heat exchange pipes are evenly arranged in the heat exchanger shell, a flow guide plate is arranged on the upper portion in the heat exchanger shell, the end cover is arranged on the heat exchanger shell, a liquid separation cavity is formed between the heat exchanger shell and the end cover, a liquid inlet is formed in the top of the end cover, and extension rods are symmetrically arranged below the two sides of the end cover. The extension rod is arranged on the outer side of the heat exchanger shell, the end cover at the top of the heat exchanger shell is detachably installed, the cover plate can be installed or detached by rotating the control ring, and when the guide plate needs to be overhauled and maintained, the end cover can be rapidly detached so as to improve convenience during overhauling.

Description

Technical Field

[0001] The utility model relates to the field of magnetic suspension heat pumps, and more specifically, to a falling film heat exchanger for a magnetic suspension heat pump. Background Art

[0002] A magnetic levitation heat pump is a heat pump unit that uses a magnetic levitation bearing drive. Using magnetic levitation bearings to drive the mechanical bearings can effectively reduce friction during shaft rotation and improve transmission efficiency. It is used in conjunction with a corresponding heat exchanger in the entire heat pump system. Currently, the most common heat exchanger is a falling film heat exchanger. In a falling film heat exchanger, the feed liquid is added from the upper tube box of the falling film evaporator's heating chamber. Through a liquid distribution and film-forming device, it is evenly distributed to each heat exchange tube. Under the influence of gravity, vacuum induction, and airflow, the feed liquid flows from top to bottom in a uniform film. During the flow process, the feed liquid is heated and vaporized by the shell-side heating medium. The generated steam and liquid phase enter the separation chamber of the evaporator together. After sufficient separation of the vapor and liquid, the steam enters the condenser for condensation or enters the next-effect evaporator as a heating medium, thus achieving multi-effect operation. The liquid phase is discharged from the separation chamber to improve heat exchange efficiency.

[0003] The common falling film heat exchanger is a vertical heat exchanger, and a corresponding guide plate is provided above the inside of the shell to separate the liquid. The guide plate is an important component of the heat exchanger and needs to be cleaned after long-term use. However, the existing heat exchanger shell is mostly an integrated structure or is made of bolts and flanges. This makes it extremely inconvenient to clean or replace the guide plate. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a falling film heat exchanger for a magnetic levitation heat pump, which can realize the rapid installation or removal of the end cover to facilitate the maintenance of the guide plate.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the present invention adopts the following technical solutions.

[0008] A falling film heat exchanger for a magnetic levitation heat pump comprises a heat exchanger shell and an end cover, the heat exchanger shell is arranged vertically, a liquid outlet is provided at the bottom of the heat exchanger shell, a steam inlet is provided above one side of the heat exchanger shell, heat exchange tubes are evenly arranged inside the heat exchanger shell, a guide plate is provided above the interior of the heat exchanger shell, the end cover is placed above the heat exchanger shell, a liquid separation cavity is formed between the heat exchanger shell and the end cover, a liquid inlet is provided at the top of the end cover, extension rods are symmetrically provided below both sides of the end cover, the extension rods are placed outside the heat exchanger shell, an inclined groove is provided on the outer surface of the extension rods, an outer convex ring is provided above the surface of the heat exchanger shell, the two extension rods both penetrate the outer convex ring, a control ring is rotatably installed inside the outer convex ring, and fixing bolts are symmetrically provided on the inner surface of the control ring, and the fixing bolts are adapted to the inner size of the inclined groove.

[0009] Furthermore, a sealing ring is glued to the upper surface of the heat exchanger shell, and the lower end surface of the end cover is in contact with the sealing ring.

[0010] Furthermore, an open groove is provided on the front side of the outer convex ring, and a boss is provided on the outer side of the control ring, and the boss passes through the open groove.

[0011] Furthermore, the outer side surface of the heat exchanger shell is evenly provided with limiting protrusions, and the limiting protrusions are distributed in a fan shape. The inner side of the boss is opened with mounting holes, and the mounting holes correspond to the positions of the limiting protrusions.

[0012] Furthermore, a wedge block is slidably installed inside the boss, and the end of the wedge block is engaged with the limiting protruding teeth.

[0013] Furthermore, a pull-twist is provided on the outside of the wedge block, and the pull-twist passes through the outer surface of the boss. A spring is sleeved on the pull-twist surface, and the spring is placed inside the mounting hole. One end of the spring contacts the wedge block.

[0014] Furthermore, a gas phase channel is connected to the lower side of one side of the heat exchanger shell, and a separator is connected to one end of the gas phase channel away from the heat exchanger shell.

[0015] 3. Beneficial effects

[0016] Compared with the existing technology, the advantages of the present invention are: the present invention provides a falling film heat exchanger for a magnetic levitation heat pump, the end cover on the top of the heat exchanger shell is installed in a detachable form, and the cover can be installed or removed by rotating the control ring. When the guide plate needs to be inspected and maintained, the end cover can be quickly removed to improve the convenience during inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the installation three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the end cover and the top of the shell of the present invention;

[0019] Figure 3 This is a schematic diagram of the fixed bolt distribution structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the end cover structure of the utility model;

[0021] Figure 5 For the utility model Figure 2 Schematic diagram of the enlarged three-dimensional structure of area A.

[0022] Explanation of the numbers in the figure: 1. Heat exchanger shell; 2. Separator; 3. Gas phase channel; 4. Liquid outlet; 5. Steam inlet; 6. End cover; 7. Liquid inlet; 8. Guide plate; 9. Heat exchange tube; 10. Extension rod; 11. Inclined groove; 12. Sealing ring; 13. External convex ring; 14. Limiting convex tooth; 15. Control ring; 151. Fixing bolt; 16. Boss; 17. Open groove; 18. Mounting hole; 19. Wedge block; 20. Spring; 21. Pull and twist. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Example:

[0025] See also Figure 1-Figure 4As shown, a falling film heat exchanger for a magnetic levitation heat pump includes a heat exchanger shell 1 and an end cover 6. The heat exchanger shell 1 is arranged vertically so that the liquid can flow downward along the inner wall of the heat exchange tube 9 due to its own weight. A liquid outlet 4 is provided at the bottom of the heat exchanger shell 1 to collect and discharge the liquid after heat exchange. A steam inlet 5 is provided above one side of the heat exchanger shell 1. Heat exchange tubes 9 are evenly arranged inside the heat exchanger shell 1. The heat exchange tubes 9 are arranged vertically. A guide plate 8 is provided above the inside of the heat exchanger shell 1. The top of the heat exchange tube 9 passes through the guide plate 8 to ensure that when the liquid flows downward, it can first cover the entire guide plate 8. When the liquid level is higher than the heat exchange tube 9, it can flow downward along the inner wall of the heat exchange tube 9. The end cover 6 is placed above the heat exchanger shell 1. A liquid separation cavity is formed between the heat exchanger shell 1 and the end cover 6. A liquid inlet 7 is provided on the top of the end cover 6. Extension rods 1 are symmetrically provided below both sides of the end cover 6. 0, the extension rod 10 is placed on the outside of the heat exchanger shell 1, and an inclined groove 11 is provided on the outer surface of the extension rod 10. An outer convex ring 13 is provided above the surface of the heat exchanger shell 1. The two extension rods 10 pass through the outer convex ring 13, so that the end cover 6 can only move in the vertical direction to realize the installation or removal of the end cover 6. A control ring 15 is rotatably installed inside the outer convex ring 13. The control ring 15 does not contact the surface of the heat exchanger shell 1, and a gap is left between the two. The inner surface of the control ring 15 is symmetrically provided with fixing bolts 151, which are adapted to the inner size of the inclined groove 11. Since the control ring 15 can only rotate, the fixing bolts 151 are of the same height. When the control ring 15 rotates, the inclined groove 11 can be squeezed by the fixing bolts 151 to drive the end cover 6 to move up and down. When the end cover 6 is installed, the fixing bolts 151 can be offset from the installation range of the extension rod 10.

[0026] Please refer to Figure 2 As shown, the contact surface between the heat exchanger shell 1 and the end cover 6 is stepped. A sealing ring 12 is glued to the upper surface of the heat exchanger shell 1, and the lower end surface of the end cover 6 contacts the sealing ring 12. The sealing ring 12 can increase the sealing performance of the two to prevent steam leakage.

[0027] Please refer to Figure 2 、 Figure 3 and Figure 5 An open groove 17 is provided on the front side of the outer convex ring 13, and a boss 16 is provided on the outside of the control ring 15. The boss 16 passes through the open groove 17, and the boss 16 can only slide inside the open groove 17. The boss 16 increases the thickness of the control ring 15 and at the same time makes the control ring 15 rotate only within a certain range to facilitate the installation of internal parts. Limiting convex teeth 14 are evenly provided on the outer side of the heat exchanger shell 1. The limiting convex teeth 14 are distributed in a fan shape, and the distribution area coincides with the open groove 17, so that the boss 16 corresponds to the limiting convex teeth 14 regardless of its position. A mounting hole 18 is provided on the inside of the boss 16, and the mounting hole 18 corresponds to the position of the limiting convex teeth 14.

[0028] Among them, a wedge block 19 is slidably installed inside the boss 16, and the end of the wedge block 19 is engaged with the limiting convex tooth 14, and the control ring 15 is limited by the dynamic cooperation of the two. The direction of the inclined surface at the end of the wedge block 19 ensures that the extension rod 10 moves smoothly when it moves down and cannot move in the opposite direction, so as to achieve the fixation of the end cover 6. A pull-twist 21 is provided on the outside of the wedge block 19, and the pull-twist 21 passes through the outer surface of the boss 16, which is convenient for controlling the wedge block 19 from the outside. A spring 20 is provided on the surface of the pull-twist 21, and the spring 20 is placed inside the mounting hole 18. One end of the spring 20 contacts the wedge block 19, and the elastic force of the spring 20 is used to ensure that the wedge block 19 always keeps in cooperation with the limiting convex tooth 14 in the corresponding position and cannot move in the opposite direction.

[0029] Please refer to Figure 1 and Figure 2 As shown, a gas phase channel 3 is connected to the lower side of the heat exchanger shell 1, and a separator 2 is connected to the end of the gas phase channel 3 away from the heat exchanger shell 1 to guide the steam so as to facilitate the recycling of the steam.

[0030] Working principle: Connect the liquid pipeline to be heat exchanged with the liquid inlet 7 and pass it into the end cover 6. After the liquid enters the liquid separation chamber, it gradually covers the guide plate 8. When the liquid level reaches a certain height, the liquid can flow downward along the inner wall of the heat exchange tube 9. At this time, steam is introduced into the heat exchanger shell 1 through the steam inlet 5 to heat the heat exchange tube 9. The liquid flows downward and flows out through the liquid outlet 4 after heat exchange, while the steam flows into the separator 2 through the gas phase channel 3 for separation. When the guide plate 8 needs to be inspected and maintained, the pull-twist 21 can be pulled so that the wedge block 19 is no longer in contact with the limit convex tooth 1 4, the control ring 15 is controlled to rotate by pulling and twisting 21. At this time, the extension rod 10 can be controlled to move upward by the cooperation of the fixing bolt 151 and the inclined groove 11, thereby realizing the separation of the end cover 6 from the heat exchanger shell 1. When the fixing bolt 151 completely exceeds the inclined groove 11, the liquid inlet 7 can be separated, so that the end of the heat exchanger shell 1 is open, and the guide plate 8 is completely exposed. Conversely, when installing the end cover 6, the control ring 15 can be rotated to drive the fixing bolt 151 to rotate, and then the extension rod 10 can be pressed downward by cooperating with the inclined groove 11, thereby causing the end cover 6 to move downward to squeeze the sealing ring 12, thereby improving the sealing performance.

[0031] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A falling film heat exchanger for a magnetic levitation heat pump, comprising a heat exchanger shell (1) and an end cover (6), wherein the heat exchanger shell (1) is arranged vertically, a liquid outlet (4) is provided at the bottom of the heat exchanger shell (1), and a steam inlet (5) is provided above one side of the heat exchanger shell (1), and is characterized in that: Heat exchange tubes (9) are evenly arranged inside the heat exchanger shell (1), a guide plate (8) is arranged above the inside of the heat exchanger shell (1), the end cover (6) is placed above the heat exchanger shell (1), a liquid separation chamber is formed between the heat exchanger shell (1) and the end cover (6), a liquid inlet (7) is provided on the top of the end cover (6), extension rods (10) are symmetrically arranged below both sides of the end cover (6), the extension rods (10) are placed outside the heat exchanger shell (1), an outer surface of the extension rods (10) is provided with an inclined groove (11), an outer convex ring (13) is provided above the surface of the heat exchanger shell (1), both of the extension rods (10) pass through the outer convex ring (13), a control ring (15) is rotatably installed inside the outer convex ring (13), and a fixing bolt (151) is symmetrically provided on the inner surface of the control ring (15), and the fixing bolt (151) is adapted to the inner size of the inclined groove (11).

2. The falling film heat exchanger for a magnetic levitation heat pump according to claim 1, characterized in that: A sealing ring (12) is glued to the upper surface of the heat exchanger shell (1), and the lower end surface of the end cover (6) is in contact with the sealing ring (12).

3. The falling film heat exchanger for a magnetic levitation heat pump according to claim 2, characterized in that: An open groove (17) is provided on the front side of the outer convex ring (13), and a boss (16) is provided on the outer side of the control ring (15), and the boss (16) passes through the open groove (17).

4. The falling film heat exchanger for a magnetic levitation heat pump according to claim 3, characterized in that: The outer side surface of the heat exchanger shell (1) is evenly provided with limiting protruding teeth (14), and the limiting protruding teeth (14) are distributed in a fan shape. The inner side of the boss (16) is provided with a mounting hole (18), and the position of the mounting hole (18) corresponds to that of the limiting protruding teeth (14).

5. The falling film heat exchanger for a magnetic levitation heat pump according to claim 4, characterized in that: A wedge block (19) is slidably mounted inside the boss (16), and the end of the wedge block (19) is meshed with the limiting convex tooth (14).

6. The falling film heat exchanger for a magnetic levitation heat pump according to claim 5, characterized in that: A pull-twist (21) is provided on the outside of the wedge block (19), and the pull-twist (21) passes through the outer surface of the boss (16). A spring (20) is sleeved on the surface of the pull-twist (21), and the spring (20) is placed inside the mounting hole (18). One end of the spring (20) contacts the wedge block (19).

7. The falling film heat exchanger for a magnetic levitation heat pump according to claim 1, characterized in that: A gas phase channel (3) is connected to the lower side of one side of the heat exchanger shell (1), and a separator (2) is connected to the end of the gas phase channel (3) facing away from the heat exchanger shell (1).

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