A plate-fin oil-water heat exchanger

Abstract

This utility model discloses a plate-fin oil-water heat exchanger, including a heat exchanger body. Evenly distributed guide rods are arranged within the heat exchanger body. Several heat exchange units are slidably installed within the heat exchanger body via these evenly distributed guide rods. Each heat exchange unit includes a frame plate slidably mounted on the evenly distributed guide rods, and several heat exchange cores are arranged within the frame plate. By inserting a top plate into the gaps between the heat exchange cores and pushing them apart, the adhesion formed by dirt can be directly broken, eliminating the need for forced pulling. This makes disassembly of the heat exchange cores effortless and convenient, reducing the labor intensity of maintenance personnel. It is especially suitable for operating conditions where dirt accumulation is severe after long-term use. Furthermore, maintenance of a single unit does not require disassembling the entire heat exchanger body. The heat exchange cores are simultaneously fixed by the clamping plates and clamping blocks of the frame plate. During installation, only the double-ended screws need to be turned to fix multiple heat exchange cores, which is more efficient than installing and fixing them piece by piece, significantly shortening maintenance and installation downtime and improving the operating efficiency of the heat exchanger.

Description

Technical Field

[0001] This utility model relates to the technical field of plate-fin heat exchangers, specifically a plate-fin oil-water heat exchanger. Background Technology

[0002] Plate-fin heat exchangers are mainly composed of baffles, fins, seals, and guide vanes. Fins, guide vanes, and seals are placed between two adjacent baffles to form a sandwich layer, which serves as a channel. These sandwich layers are stacked according to different fluid flow patterns and brazed into a whole to form a plate bundle. The plate bundle is the core of the plate-fin heat exchanger. With the continuous development of technology, the heat exchange efficiency of plate-fin heat exchangers has reached a new level compared to previous heat exchangers. They also have advantages such as small size and light weight. They are now widely used in the fields of refrigeration and cryogenic technology, air liquefaction and separation, natural gas liquefaction, and gas cryogenic liquefaction.

[0003] A search revealed a patent with publication number CN223106759U, which proposes a dual-purpose plate-fin heat exchanger. This patent, belonging to the heat exchanger field, aims to address the problems of small cross-sectional areas, heavy weight, and high flow resistance in existing technologies, leading to increased system energy consumption. The proposed solution includes a core and a support frame. The core is mounted on the support frame. The top of the core has a second refrigerant connector, a first refrigerant connector, a coolant inlet pipe, and a coolant outlet pipe. The core comprises an upper plate, a lower plate, and a main plate. Multiple main plates are located between the upper and lower plates, and fins are located between adjacent main plates. A refrigerant inlet pipe is also located within the core. The plate-fin structure increases fin turbulence, reduces flow resistance, and improves heat exchange.

[0004] In the aforementioned prior art, after long-term use of both oil and water media for heat exchange, sludge and impurities produced by oil oxidation tend to accumulate in the gaps between the cores, leading to a gradual deterioration in heat exchange efficiency. Furthermore, the cores are located inside the support structure, making disassembly inconvenient. The dirt and impurities further strengthen the connection between the cores, making disassembly even more difficult. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] In view of the problems existing in the above and / or existing plate-fin oil-water heat exchangers, this utility model is proposed.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: A plate-fin oil-water heat exchanger includes a heat exchanger body, wherein uniformly distributed guide rods are arranged inside the heat exchanger body, and a plurality of heat exchange units are slidably installed inside the heat exchanger body via the uniformly distributed guide rods. The heat exchange unit includes a frame plate that is slidably mounted on evenly distributed guide rods. A plurality of heat exchange cores are disposed inside the frame plate, and the frame plate clamps and fixes the heat exchange cores.

[0008] As a preferred embodiment of the plate-fin oil-water heat exchanger described in this utility model, the heat exchange core includes a plate body disposed within a frame plate, and locking blocks are provided on both sides of the plate body, the locking blocks being slidably adapted to the frame plate.

[0009] As a preferred embodiment of the plate-fin oil-water heat exchanger described in this utility model, the frame plate includes a pair of fixed seats and a connecting plate connected together, and an adjacent pair of guide rods are inserted into the fixed seats and slidably adapted.

[0010] As a preferred embodiment of the plate-fin oil-water heat exchanger described in this utility model, a bidirectional screw is rotatably mounted on the connecting plate, and a first clamping plate and a second clamping plate are respectively screwed onto the threaded portion of the bidirectional screw. The first clamping plate and the second clamping plate are slidably disposed on the outer wall of the connecting plate.

[0011] As a preferred embodiment of the plate-fin oil-water heat exchanger described in this utility model, a second clamping block and a first clamping block are respectively provided at the ends of the second clamping plate and the first clamping plate that are far apart from each other.

[0012] As a preferred embodiment of the plate-fin oil-water heat exchanger described in this utility model, a sliding plate is slidably mounted on the second clamping block, and the sliding plate is provided with uniformly distributed top plates.

[0013] In a preferred embodiment of the plate-fin oil-water heat exchanger described in this utility model, a screw is inserted into and screwed onto the second clamping plate, and one end of the screw is connected to the sliding plate.

[0014] In a preferred embodiment of the plate-fin oil-water heat exchanger described in this utility model, the first clamping block is slidably disposed at the end of the first clamping plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This device breaks up the adhesion of dirt by inserting the top plate into the gap of the heat exchange core and pushing it apart. It eliminates the need for forced pulling, making the disassembly of the heat exchange core easier and more convenient, reducing the labor intensity of maintenance personnel. It is especially suitable for working conditions with severe dirt accumulation after long-term use. Moreover, the maintenance of a single unit does not require disassembling the entire heat exchanger body. The heat exchange core is simultaneously fixed by the clamps and clamping blocks of the frame plate. During installation, multiple heat exchange cores can be fixed by simply turning the bidirectional screws. This is more efficient than installing and fixing them piece by piece, significantly shortening the downtime for maintenance and installation, and improving the operating efficiency of the heat exchanger. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of a plate-fin oil-water heat exchanger according to the present invention. Figure 2 This is a schematic diagram of the heat exchange unit location structure of a plate-fin oil-water heat exchanger according to the present invention. Figure 3 This is a schematic diagram of the heat exchange unit structure of a plate-fin oil-water heat exchanger according to the present invention. Figure 4 This is a schematic diagram of the frame plate structure of a plate-fin oil-water heat exchanger according to the present invention. Figure 5 This is a schematic diagram of the first and second clamping plates of a plate-fin oil-water heat exchanger according to the present invention.

[0017] In the diagram: 1. Heat exchanger body; 2. Heat exchange unit; 3. Guide rod; 4. Frame plate; 5. Heat exchange core; 6. Plate body; 7. Clamping block; 8. Fixing seat; 9. Connecting plate; 10. Bidirectional screw; 11. First clamping plate; 12. Second clamping plate; 13. First clamping block; 14. Second clamping block; 15. Slide plate; 16. Top plate; 17. Screw. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0021] Please refer to the following: Figures 1 to 5 This embodiment provides a plate-fin oil-water heat exchanger, which includes a heat exchanger body 1, a guide rod 3 and several heat exchange units 2. The guide rod 3 provides installation and movement guidance for the heat exchange units 2. The heat exchange units 2 adopt a modular design, can be extracted for maintenance as a whole, and have a targeted heat exchange core 5 fixing and separation structure inside, which takes into account both installation stability and disassembly convenience.

[0022] Specifically, the heat exchanger body 1 is a hollow shell structure, which is used to accommodate the heat exchange medium and install the heat exchange components. Multiple guide rods 3 are provided and are evenly distributed along the length of the heat exchanger body 1. Their two ends are fixedly connected to the inner walls of the two ends of the heat exchanger body 1, and their axes are parallel to the length of the heat exchanger body 1. Several heat exchange units 2 are slidably installed on the guide rods 3. Each heat exchange unit 2 can be independently pulled out or pushed into the heat exchanger body 1 along the axis of the guide rod 3 without disassembling the shell bolts of the heat exchanger body 1. When maintenance is required, the target heat exchange unit 2 only needs to be pulled out along the guide rod 3 to clean or replace the heat exchange core 5 inside, avoiding the cumbersome operation of traditional heat exchangers that require complete disassembly of the shell.

[0023] Each heat exchange unit 2 includes a frame plate 4 and several heat exchange cores 5. The frame plate 4 serves as the mounting carrier for the heat exchange cores 5 and also achieves a sliding fit with the guide rods 3. The heat exchange cores 5 are the core components of heat exchange. Several heat exchange cores 5 are arranged in parallel and spaced within the frame plate 4. Oil and water flow in the gaps between adjacent heat exchange cores 5, and heat transfer is achieved through the heat exchange cores 5. The frame plate 4 includes a pair of fixed seats 8 and a connecting plate 9. The pair of fixed seats 8 are fixedly connected to both ends of the connecting plate 9 to form a support structure. Two adjacent guide rods 3 are inserted into the two fixed seats 8, and the guide rods 3 slide and adapt to the inner wall of the fixed seats 8. This fit ensures that the heat exchange unit 2 will not shift laterally when it moves along the guide rods 3. At the same time, the rigid connection between the fixed seats 8 and the connecting plate 9 provides stable clamping support for the heat exchange cores 5.

[0024] The heat exchange core 5 includes a plate body 6 and a pair of locking blocks 7. The plate body 6 is a thin-plate heat exchange structure. The pair of locking blocks 7 are fixedly set on the two sides of the plate body 6, and the extension direction of the locking blocks 7 is consistent with the length direction of the plate body 6. The inner wall of the connecting plate 9 of the frame plate 4 is provided with a slot that matches the locking blocks 7. The locking blocks 7 are inserted into the slots and slide to match the slots. When installing the heat exchange core 5, the locking blocks 7 of the heat exchange core 5 are aligned with the slots of the connecting plate 9 and pushed in, which can achieve the initial positioning of the heat exchange core 5 in the frame plate 4, and prevent the heat exchange core 5 from shifting due to the impact of the medium flow during the heat exchange process. At the same time, multiple heat exchange cores 5 can be installed in sequence in the same way to form a neat heat exchange gap, ensuring uniform flow of the heat exchange medium and improving the heat exchange efficiency.

[0025] To securely fix several heat exchange cores 5, a bidirectional screw 10 is rotatably mounted on the connecting plate 9. The axis of the bidirectional screw 10 is parallel to the length direction of the connecting plate 9, and its shaft has two sections of threads with opposite directions. A first clamping plate 11 and a second clamping plate 12 are respectively screwed onto the two opposing threaded sections of the bidirectional screw 10. A sliding groove extending along the length direction is formed on the outer wall of the connecting plate 9. The bottoms of both the first clamping plate 11 and the second clamping plate 12 are embedded in the sliding groove and slide within it. A first clamping block 13 is provided at the end of the first clamping plate 11 away from the bidirectional screw 10, and a second clamping block 14 is provided at the end of the second clamping plate 12 away from the bidirectional screw 10. The opposing surfaces of clamping block 13 and second clamping block 14 are adapted to the side of heat exchange core 5. When it is necessary to fix the heat exchange core 5, the double-acting screw 10 is turned clockwise. The two reverse threads of the double-acting screw 10 drive the first clamping plate 11 and the second clamping plate 12 to slide towards each other along the slide groove until the first clamping block 13 and the second clamping block 14 are respectively attached to the two side edges of several heat exchange cores 5. The clamping force fixes the multiple heat exchange cores 5 as a whole in the frame plate 4. This fixing method can apply a uniform clamping force to multiple heat exchange cores 5 at the same time, avoiding deformation caused by uneven force on a single heat exchange core 5. It can also adapt to different combinations of heat exchange cores 5, improving the versatility of the structure.

[0026] Furthermore, a sliding cavity extending along its length is provided on the inner wall of the second clamping block 14. A sliding plate 15 is slidably installed in the sliding cavity. Multiple top plates 16 are fixedly provided on the side of the sliding plate 15 facing the heat exchange core 5. The multiple top plates 16 are evenly distributed along the length of the sliding plate 15, and the spacing of the top plates 16 corresponds one-to-one with the gap of the adjacent heat exchange core 5. A screw 17 is screwed onto the side wall of the second clamping plate 12 along an axis perpendicular to the sliding direction of the clamping plate. One end of the screw 17 passes through the second clamping plate 12 and extends into the sliding cavity, and is rotatably connected to the end face of the sliding plate 15. When it is necessary to disassemble the heat exchange core 5, firstly, move the first clamping block 13 along the length of the first clamping plate 11 to retract the first clamping block 13 and disengage it from the heat exchange core 5, thus releasing the fixation on one side of the heat exchange core 5. Then, turn the screw 17 clockwise. The rotation of the screw 17 is converted into linear movement along the axis, pushing the slide plate 15 along the sliding cavity of the second clamping block 14 toward the heat exchange core 5 until the multiple top plates 16 are inserted into the gaps between adjacent heat exchange cores 5. Finally, continue to turn the bidirectional screw 10 clockwise. The screw 10 drives the second clamping plate 12 to move along the slide groove away from the first clamping plate 11. The second clamping plate 12 drives the top plate 16 to move synchronously through the screw 17 and the sliding plate 15. The top plate 16 applies a separation force to the adjacent heat exchange cores 5, separating the heat exchange cores 5 that are stuck together by dirt one by one. In this process, the separation action of the top plate 16 directly destroys the adhesion structure of the dirt, greatly reduces the adhesion between the heat exchange cores 5, avoids the problem of deformation or damage to the heat exchange cores 5 caused by forced pulling in traditional disassembly, and makes disassembly more labor-saving.

[0027] Furthermore, to improve ease of operation, one end of the bidirectional screw 10 can extend to the outside of the frame plate 4 and is fixedly equipped with a manual knob, which can be manually turned without the need for tools, simplifying clamping and separation operations. At the same time, protrusions can be provided on both sides of the slide plate 15, and the inner wall of the sliding cavity of the second clamping block 14 is correspondingly provided with a guide groove. The protrusions and the guide groove slide and adapt to each other, ensuring that the slide plate 15 will not deviate when it moves the top plate 16, ensuring that the top plate 16 is accurately inserted into the gap of the heat exchange core 5, and avoiding damage to the heat exchange core 5 due to misalignment.

[0028] During use, the heat exchange core 5 has four fluid channels at its four corners, and each pair of fluid channels is connected through the heat exchange core 5. At the same time, the upper and lower heat exchange cores 5 are not connected to each other. With the design of connecting the diagonal channels on both sides, when oil and water flow in from one corner channel respectively, the medium can move in a parallel direction to evenly cover the entire plate 6 and be discharged through the diagonal channel. During the process, the medium flowing in the upper and lower heat exchange cores 5 is different, the flow direction is different, and they are not connected. This avoids the mixing of the medium and ensures that each heat exchange core 5 fully participates in heat exchange to achieve a uniform heat exchange effect.

[0029] In practical applications, after long-term use, the plate-fin oil-water heat exchanger is prone to accumulating sludge and impurities caused by oil oxidation between the heat exchange cores 5, resulting in decreased heat exchange efficiency and difficulty in disassembly. In this case, it is not necessary to disassemble the shell of the heat exchanger body 1. Instead, the corresponding heat exchange unit 2 can be pulled out along the guide rod 3. By moving the first clamping block 13 and turning the screw 17, the top plate 16 can be inserted into the gap of the heat exchange core 5. Then, the double-acting screw 10 can be turned to separate the top plate 16 from the heat exchange core 5, and the heat exchange cores 5 can be easily removed and cleaned one by one. After cleaning, the heat exchange core 5 is positioned by the slot of the locking block 7 and the connecting plate 9. The double-acting screw 10 is turned to clamp it. Then, the heat exchange unit 2 is pushed into the heat exchanger body 1 along the guide rod 3 to complete the maintenance.

[0030] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A plate-fin type oil-water heat exchanger, characterized in that, It includes a heat exchanger body (1), in which uniformly distributed guide rods (3) are provided, and several heat exchange units (2) are slidably installed in the heat exchanger body (1) through the uniformly distributed guide rods (3). The heat exchange unit (2) includes a frame plate (4) that is slidably mounted on a uniformly distributed guide rod (3). A plurality of heat exchange cores (5) are provided inside the frame plate (4), and the frame plate (4) clamps and fixes the heat exchange cores (5).

2. The plate-fin oil-water heat exchanger according to claim 1, characterized in that, The heat exchange core (5) includes a plate body (6) disposed in the frame plate (4), and a locking block (7) is provided on both sides of the plate body (6), and the locking block (7) is slidably adapted to the frame plate (4).

3. A plate-fin oil-water heat exchanger according to claim 1, characterized in that, The frame plate (4) includes a pair of fixed seats (8) and a connecting plate (9) connected to each other, and a pair of adjacent guide rods (3) are inserted into the fixed seats (8) and slidably adapted.

4. A plate-fin oil-water heat exchanger according to claim 3, characterized in that, A bidirectional screw (10) is rotatably mounted on the connecting plate (9). A first clamping plate (11) and a second clamping plate (12) are screwed onto the threaded portion of the bidirectional screw (10). The first clamping plate (11) and the second clamping plate (12) are slidably disposed on the outer wall of the connecting plate (9).

5. A plate-fin oil-water heat exchanger according to claim 4, characterized in that, The second clamping plate (12) and the first clamping plate (11) are respectively provided with a second clamping block (14) and a first clamping block (13) at the ends that are far apart from each other.

6. A plate-fin oil-water heat exchanger according to claim 5, characterized in that, A sliding plate (15) is slidably mounted on the second clamping block (14), and a top plate (16) is evenly distributed on the sliding plate (15).

7. A plate-fin oil-water heat exchanger according to claim 6, characterized in that, A screw (17) is inserted and screwed onto the second clamping plate (12), and one end of the screw (17) is connected to the sliding plate (15).

8. A plate-fin oil-water heat exchanger according to claim 5, characterized in that, The first clamping block (13) is slidably disposed at the end of the first clamping plate (11).

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