A new plate heat exchanger

Abstract

The utility model discloses a novel plate heat exchanger belongs to heat exchange equipment technical field. Heat exchanger includes module casing and contains heat exchange subassembly in its inside, and the module casing inner wall is seted up with the spacing groove for installing locking mechanism. The extrusion mechanism is set up in the module casing one end, and installs locking mechanism in the other end, and the extrusion mechanism drives connecting rod and extrusion column through the poking handle, and utilizes lever principle to exert extrusion pressure to heat exchange subassembly, and locking mechanism then provides steady reverse support for heat exchange subassembly through the fixed block and sliding block of being connected in spacing groove, thereby forms the closed mechanical system in single module inside. The utility model discloses the above -mentioned scheme, effectively solved the uneven stress, the problem of sealing failure of the existing large -scale heat exchanger because of frame deformation, has the remarkable advantages such as high sealing reliability, stable structure, convenient installation and maintenance and easy modularization extension.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and in particular to a novel plate heat exchanger. Background Technology

[0002] Plate heat exchangers, as efficient and compact heat exchange devices, are widely used in many industrial fields such as chemical, power, metallurgy, and heating. Their basic structure typically includes a plate assembly composed of multiple corrugated metal plates stacked together, and a frame for clamping and fixing the plate assembly. The frame mainly consists of a fixed pressure plate, a movable pressure plate, and clamping screws. By tightening the clamping screws, the movable pressure plate moves towards the fixed pressure plate, thereby applying a huge clamping force to the plate assembly, ensuring that the gaskets between the plates are compacted, forming independent channels for cold and hot fluids.

[0003] With the continuous expansion of modern industrial production scale, the requirements for the heat exchange capacity of individual equipment are also increasing, which directly leads to a sharp increase in the size and weight of plate heat exchangers. For large and even super-large plate heat exchangers, the size of their movable clamping plates becomes enormous, and the length of the clamping screws also becomes correspondingly long. Under the dual action of enormous preload and their own weight, the structural rigidity of such large-size, long-span frame structures faces severe challenges.

[0004] In actual operation, excessively long clamping screws and large-area movable clamping plates inevitably produce bending deformations that are difficult to detect with the naked eye. This deformation leads to uneven distribution of clamping force applied across the entire plate assembly, typically manifested as lower clamping force in the central region of the frame compared to the end regions. This uneven distribution of clamping force disrupts the ideal clamping state of the gaskets between the plates, resulting in incomplete sealing in some areas. This not only reduces heat exchange efficiency but, more seriously, can cause internal fluid leakage and even serious accidents involving cross-contamination of hot and cold media, posing a significant threat to production safety.

[0005] Therefore, this utility model proposes a novel plate heat exchanger to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in the technology of large plate heat exchangers, such as the bending deformation of the clamping plate due to the huge overall frame size and excessive weight, resulting in uneven stress on the plate assembly, low sealing reliability and easy fluid leakage, this utility model aims to provide a new type of plate heat exchanger with improved structure that can effectively solve the above problems.

[0007] This utility model provides a novel plate heat exchanger, including a heat exchange component disposed inside, and a module housing for accommodating the heat exchange component. Each of the opposing inner walls of the module housing is provided with a limiting groove extending along its length direction; a pressing mechanism disposed at one end opening of the module housing, and a locking mechanism detachably installed at the other end opening of the module housing.

[0008] The extrusion mechanism includes a connecting block 1 fixedly connected to the inner wall of the module housing, a lever rotatably connected to the connecting block 1 at one end, a connecting block 2 rotatably connected to the other end of the lever, and an extrusion column rotatably connected to the connecting block 2 at one end, with the other end of the extrusion column facing the heat exchange assembly.

[0009] Furthermore, the locking mechanism includes a locking frame, a fixing block fixedly connected to one side of the locking frame and engaged in one of the limiting grooves, and a sliding block slidably connected to the other side of the locking frame and engaged in another limiting groove. The locking mechanism is used to abut against the heat exchange assembly and provide reverse support force for the extrusion mechanism.

[0010] Preferably, the sliding block is provided with a limiting bead, which is used to elastically lock the sliding block in a preset sliding position of the locking frame.

[0011] Preferably, the extrusion mechanism further includes a limiting sleeve, which is fixedly connected to the inner wall of the module housing, and the extrusion column is slidably inserted into the limiting sleeve.

[0012] Preferably, the extrusion mechanism further includes a linkage rod and a limiting block; the linkage rod is rotatably connected to the middle of the actuating handle, and the limiting block is fixedly connected to the inner wall of the module housing; when the extrusion column applies extrusion force to the heat exchange assembly, the linkage rod and the limiting block engage with each other to achieve locking.

[0013] Preferably, the heat exchange assembly includes two extrusion plates located at both ends, and a plurality of heat exchange grids sandwiched between the two extrusion plates.

[0014] Preferably, the other end of the extrusion column abuts against one of the extrusion plates, and the locking frame of the locking mechanism abuts against the other extrusion plate on the side facing the heat exchange assembly.

[0015] Preferably, the novel plate heat exchanger further includes at least two active plates for clamping two parallel module housings, a plurality of threaded rods passing through the active plates, and nuts for locking the threaded rods.

[0016] Preferably, the active plate has at least one integrally formed connection port for connecting to an external pipeline.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problem of uneven stress on the plate group, sealing failure, and fluid leakage caused by deformation of the pressure plate due to excessive overall frame length and weight in existing large plate heat exchangers by setting an independent modular housing and setting a pressing mechanism for actively applying pressure and a locking mechanism for providing reverse support inside the housing. It achieves the technical effect of confining the pressure force inside a single rigid module, ensuring uniform stress on the plate group, and improving the sealing reliability of the equipment.

[0019] 2. This utility model, by employing a pressing mechanism consisting of a lever, connecting rod, and locking block, and a locking mechanism consisting of a sliding block and a limiting groove, solves the problem in the prior art that requires the use of special tools such as torque wrenches and involves time-consuming and laborious repeated tightening of a large number of screws to complete the pressing operation, resulting in low installation and maintenance efficiency. It achieves the technical effect of quickly and labor-savingly completing the pressing and locking of heat exchange components without special tools, as well as quick disassembly and maintenance, greatly improving the ease of operation.

[0020] 3. This utility model, through a modular structural design, uses an active plate, threaded rod, and nut to combine and connect multiple independent heat exchange modules, solving the problems of fixed heat exchange capacity of existing integral heat exchangers, difficulty in flexibly adjusting according to changes in operating conditions, and difficulties in transportation and installation due to the large size of individual units. It achieves the technical effect of easily increasing or decreasing the number of heat exchange modules like building blocks, realizing flexible expansion of heat exchange capacity, and reducing the difficulty of transportation and installation of individual modules, thereby enhancing the flexibility and adaptability of the system. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a novel plate heat exchanger proposed in this utility model.

[0022] Figure 2 This is a schematic diagram of the extrusion plate of a novel plate heat exchanger proposed in this utility model.

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 A schematic diagram of the heat exchange grid structure of a novel plate heat exchanger proposed in this utility model.

[0025] Figure 5 This is a schematic diagram of the sliding block structure of a novel plate heat exchanger proposed in this utility model.

[0026] Legend:

[0027] 1. Module housing; 2. Extrusion mechanism; 21. Connecting block one; 22. Actuating handle; 23. Connecting block two; 24. Extrusion column; 25. Limiting sleeve; 26. Heat exchange assembly; 261. Extrusion plate; 262. Heat exchange grid; 27. Linkage rod; 28. Limiting block; 3. Locking mechanism; 31. Locking frame; 32. Fixing block; 33. Sliding block; 34. Limiting bead; 35. Limiting groove; 4. Active plate; 5. Threaded rod; 6. Nut; 7. Connection port. Detailed Implementation

[0028] Example:

[0029] Reference Figures 1 to 5 This utility model provides a novel plate heat exchanger, which aims to solve the problem in the prior art where large plate heat exchangers are deformed due to their own weight and size, resulting in uneven stress on the plate assembly, reduced sealing performance, and leakage risk.

[0030] like Figure 1 and Figure 2 As shown, the novel plate heat exchanger includes a module housing 1 and a heat exchange assembly 26 housed inside the module housing 1; limiting grooves 35 extending along their length are provided on the opposite inner walls of the module housing 1; the novel plate heat exchanger also includes a pressing mechanism 2 disposed at one end opening of the module housing 1 and a locking mechanism 3 detachably installed at the other end opening of the module housing 1; the pressing mechanism 2 and the locking mechanism 3 are respectively located at both ends of the heat exchange assembly 26, and work together to form a closed and independent pressing force system for the heat exchange assembly 26 inside the module housing 1.

[0031] Specifically, such as Figure 2 and Figure 3 As shown, the extrusion mechanism 2 is the core component for achieving active pressing. It includes a connecting block 21 fixedly connected to the inner wall of the module housing 1, a lever 22 with one end rotatably connected to the connecting block 21, a connecting block 23 rotatably connected to the other end of the lever 22, and an extrusion column 24 with one end rotatably connected to the connecting block 23. The other end of the extrusion column 24 faces the heat exchange assembly 26. By operating the lever 22, the extrusion column 24 is driven to produce linear displacement using the lever principle, thereby applying a huge extrusion force to the heat exchange assembly 26.

[0032] like Figure 2 and Figure 5As shown, the locking mechanism 3 is the key structure for achieving reverse support. It includes a locking frame 31, a fixing block 32 fixedly connected to one side of the locking frame 31 and used to engage with one of the limiting grooves 35, and a sliding block 33 slidably connected to the other side of the locking frame 31 and used to engage with the other limiting groove 35. By embedding the fixing block 32 and the sliding block 33 into the limiting grooves 35 on both sides of the module housing 1, the locking mechanism 3 can be firmly fixed to the open end of the module housing 1, thereby abutting against the heat exchange assembly 26 and providing a strong reverse support force for the extrusion force applied by the extrusion mechanism 2.

[0033] Reference Figure 3 The extrusion mechanism 2 also includes a limiting sleeve 25, which is fixedly connected to the inner wall of the module housing 1. The extrusion column 24 is slidably inserted in the limiting sleeve 25. The function of the limiting sleeve 25 is to provide precise guidance and support for the extrusion column 24 when it reciprocates back and forth, to ensure that the extrusion force can be stably applied to the heat exchange component 26 along the axial direction, and to prevent the extrusion column 24 from deflecting or shaking when subjected to force.

[0034] Meanwhile, the extrusion mechanism 2 also includes a linkage rod 27 and a limiting block 28; the linkage rod 27 is rotatably connected to the middle of the actuating handle 22, and the limiting block 28 is fixedly connected to the inner wall of the module housing 1; in the assembled state, when the actuating handle 22 drives the extrusion column 24 forward to the preset pressing position, the linkage rod 27 will move to the top of the limiting block 28 and engage with it. This lever-linkage self-locking structure ensures the long-term stability of the extrusion mechanism 2 in the pressing state and prevents pressure relaxation due to vibration or other reasons.

[0035] Reference Figure 5 The sliding block 33 is provided with a limiting bead 34. The limiting bead 34 is embedded inside the sliding block 33 and partially protrudes through elastic elements such as springs. When the locking mechanism 3 is installed, as the sliding block 33 is pushed into the limiting groove 35, the limiting bead 34 will elastically interfere with the inner wall of the locking frame 31. When the sliding block 33 reaches the preset sliding position, the limiting bead 34 will elastically lock in the specific structure of the locking frame 31. This elastic locking structure of the limiting bead 34 provides the sliding block 33 with a clear installation feel and reliable positioning, preventing it from accidentally sliding out when not under force, and simplifying the installation operation.

[0036] As a preferred embodiment, please refer to Figure 2 and Figure 4In order to clarify the target of the extrusion mechanism 2 and the locking mechanism 3, the heat exchange assembly 26 includes two extrusion plates 261 located at both ends, and multiple heat exchange grids 262 sandwiched between the two extrusion plates 261. The heat exchange grids 262 are the main body for exchanging hot and cold fluids, while the extrusion plates 261 have high rigidity and are used to evenly distribute the concentrated pressure applied by the extrusion column 24 and the locking mechanism 3 onto the entire plate group of the heat exchange grids 262.

[0037] As another preferred embodiment, in order to make the force transmission path more closed and clear, the other end of the extrusion column 24 directly abuts against one of the extrusion plates 261, while the locking frame 31 of the locking mechanism 3 facing the heat exchange assembly 26 directly abuts against the other extrusion plate 261; in this way, the extrusion force is emitted from the extrusion column 24, passes through the entire heat exchange assembly 26, and is finally borne by the locking mechanism 3, forming a complete and efficient mechanical transmission loop.

[0038] As another preferred embodiment, refer to Figure 1 In order to combine multiple independent heat exchanger modules into a larger heat exchange system, the heat exchanger also includes at least two active plates 4 for clamping two parallel module housings 1, multiple threaded rods 5 passing through the active plates 4, and nuts 6 for locking the threaded rods 5; the active plates 4 have sufficient strength and rigidity, and by tightening the nuts 6, the active plates 4 can apply a huge clamping force to the outer walls of the two module housings 1, ensuring a stable connection between the modules.

[0039] As another preferred embodiment, in order to facilitate the connection between the combined heat exchange system and the external pipeline, the active plate 4 is integrally formed with at least one connection port 7; the connection port 7 has a fluid channel inside, and the channel corresponds to the fluid inlet and outlet on the module housing 1. When the active plate 4 clamps the module housing 1, the channel of the connection port 7 is also precisely aligned with the channel of the module housing 1, thereby forming a complete hot and cold fluid circulation pipeline.

[0040] The working principle is as follows:

[0041] During assembly, the heat exchange assembly 26, consisting of multiple heat exchange grids 262 and two extrusion plates 261, is first placed inside the module housing 1. Then, the locking mechanism 3 is installed at one end of the module housing 1. The installation process is as follows: first, the fixing block 32 is aligned and inserted into the limiting groove 35 on one side; then, the locking frame 31 is pushed so that the sliding block 33 aligns with the limiting groove 35 on the other side; then, the sliding block 33 is pushed into the limiting groove 35. At this time, the limiting bead 34 will play an elastic locking role, thereby quickly and firmly fixing the locking mechanism 3 at the opening of the module housing 1, so that it tightly abuts against one end of the heat exchange assembly 26.

[0042] Next, the extrusion mechanism 2 at the other end of the operating module housing 1 is activated. Pushing the actuating handle 22 forward causes it to rotate around connecting block 1 21, which in turn drives the extrusion column 24 to move linearly forward along the guide sleeve 25 via connecting block 23. The extrusion column 24 pushes the extrusion plate 261 at the other end of the heat exchange assembly 26, applying pressure to the entire heat exchange assembly 26, tightly squeezing the internal heat exchange grid 262 together to ensure the sealing of the fluid passage. When the extrusion is complete, the linkage rod 27, linked to the actuating handle 22, engages in the limiting block 28, locking the entire extrusion mechanism 2 and preventing pressure retraction.

[0043] When multiple modules need to be combined, align two installed module housings 1 side by side, place the active plate 4 on the outside of the two module housings 1, and align the connection port 7 with the fluid channel of the module. Then, pass the threaded rod 5 through the two active plates 4 and tighten it from both ends with the nut 6. The clamping force applied by the threaded rod 5 and the nut 6 allows the active plate 4 to firmly connect the two module housings 1 into a whole, while ensuring a sealed connection between the connection port 7 and the fluid channel of the module.

Claims

1. A novel plate heat exchanger, comprising a heat exchange assembly (26) disposed internally, and a module housing (1) for accommodating the heat exchange assembly (26), characterized in that, The heat exchanger includes a pressing mechanism (2) disposed on the module housing (1) and a locking mechanism (3) detachably mounted on the module housing (1). The extrusion mechanism (2) includes a connecting block 1 (21), a lever (22) rotatably connected to the connecting block 1 (21) at one end, a connecting block 2 (23) rotatably connected to the lever (22) at the other end, and an extrusion column (24) rotatably connected to the connecting block 2 (23) at one end. The locking mechanism (3) includes a locking frame (31), and limit grooves (35) are provided on the opposite inner walls of the module housing (1). A fixing block (32) is fixedly connected to one side of the locking frame (31) and snapped into one of the limit grooves (35), and a sliding block (33) is slidably connected to the other side of the locking frame (31) and snapped into the other limit groove (35). The locking mechanism (3) is used to abut against the heat exchange assembly (26) and provide reverse support force for the extrusion mechanism (2). The sliding block (33) is provided with a limiting bead (34), which is used to elastically lock the sliding block (33) in the preset sliding position of the locking frame (31); The extrusion mechanism (2) further includes a limiting sleeve (25), which is fixedly connected to the inner wall of the module housing (1), and the extrusion column (24) is slidably inserted in the limiting sleeve (25); The extrusion mechanism (2) further includes a linkage rod (27) and a limiting block (28); the linkage rod (27) is rotatably connected to the middle of the actuating handle (22), and the limiting block (28) is fixedly connected to the inner wall of the module housing (1); when the extrusion column (24) applies extrusion force to the heat exchange assembly (26), the linkage rod (27) and the limiting block (28) engage with each other to achieve locking.

2. The novel plate heat exchanger according to claim 1, characterized in that, The heat exchange assembly (26) includes two extrusion plates (261) located at both ends, and a plurality of heat exchange grids (262) sandwiched between the two extrusion plates (261).

3. The novel plate heat exchanger according to claim 2, characterized in that, The other end of the extrusion column (24) abuts against one of the extrusion plates (261), and the locking frame (31) of the locking mechanism (3) abuts against the other extrusion plate (261) on the side facing the heat exchange assembly (26).

4. The novel plate heat exchanger according to claim 1, characterized in that, The heat exchanger also includes at least two active plates (4) for clamping two parallel module housings (1), a plurality of threaded rods (5) passing through the active plates (4), and nuts (6) for locking the threaded rods (5). At least one connection port (7) for connecting to an external pipeline is integrally formed on the active plates (4).

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