A new type of plate-fin heat exchanger

Abstract

The utility model belongs to the plate fin heat exchanger technical field, concretely relates to a novel plate fin heat exchanger, including two support plates, be provided with two limit axle between two support plates, be provided with the pressing plate on limit axle, be provided with fin open subassembly on the pressing plate, and fin open subassembly includes four symmetry setting rotary lever setting between two support plates, and rotary lever one end is provided with multiple groups of threads, and multiple groups of threads are same, and the number of turns of thread is different, and every thread is provided with the thread sleeve matched with it on every thread, and the fin body is installed in the bottom of thread sleeve, and four rotary lever are provided with drive assembly. The device has realized the on -line, exempts from disassembly and washes of plate fin heat exchanger, has greatly reduced maintenance cost and time consumption.

Description

Technical Field

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

[0002] Plate-fin heat exchangers typically consist of baffles, fins, seals, and guide vanes. Fins, guide vanes, and seals are placed between adjacent baffles to form a sandwich layer, called a channel. These sandwich layers are stacked according to different fluid flow patterns and brazed into a single unit to form a plate bundle. The plate bundle is the core of the plate-fin heat exchanger, which is widely used in industries such as petroleum, chemical, and natural gas processing.

[0003] Traditional plate-fin heat exchangers are typically constructed by brazing or assembling multiple layers of stacked fins with fixed flow channel clearances. When the working medium contains impurities or fouling-prone components, fouling gradually accumulates in the narrow flow channels, leading to a significant decrease in heat exchange efficiency, increased flow resistance, and even blockage. Current cleaning and maintenance methods are extremely cumbersome, usually requiring the entire heat exchanger core to be disassembled from the system and cleaned using chemical immersion, high-pressure water rinsing, or even manual peeling and cleaning of each fin. This method suffers from long downtime, high labor intensity, potential damage to precision fins during cleaning, and potential sealing or performance risks after reassembly. Therefore, there is an urgent need for a new plate-fin heat exchanger structure that enables rapid, online, and disassembly-free cleaning. Utility Model Content

[0004] The purpose of this invention is to provide a novel plate-fin heat exchanger that enables online, disassembly-free cleaning of the plate-fin heat exchanger, greatly reducing maintenance costs and time.

[0005] The specific technical solution adopted by this utility model is as follows:

[0006] A novel plate-fin heat exchanger includes two support plates, two limiting shafts are arranged between the two support plates, pressure plates are arranged on the limiting shafts, and fin opening components are arranged on the pressure plates.

[0007] The fin opening assembly includes four symmetrically arranged rotating rods disposed between the two support plates. Each rotating rod has multiple sets of threads at one end, with the threads having the same lead but different number of turns. Each thread is provided with a matching threaded sleeve, and the fin body is installed at the bottom of the threaded sleeve. A drive assembly is provided on each of the four rotating rods.

[0008] Furthermore, a sliding groove is provided on the outer side of the two limiting shafts, and a fixed shaft is provided inside the sliding groove. Multiple sliding rods are sleeved on the fixed shaft and connected to the multiple threaded sleeves one by one.

[0009] Furthermore, the slide bar matches the slide groove.

[0010] Furthermore, the drive assembly includes connecting shafts disposed on the four rotating rods, each connecting shaft being provided with a toothed pulley, the four toothed pulleys being provided with a transmission toothed belt, and one of the toothed pulleys being provided with a stepper motor.

[0011] Furthermore, one of the support plates is provided with a refrigerant inlet, a refrigerant outlet, a heat transfer medium inlet, and a heat transfer medium outlet.

[0012] Furthermore, the support plate has a first threaded hole, and the pressure plate has a second threaded hole. Threaded rods are provided inside the first and second threaded holes, and locking nuts are provided at both ends of the threaded rods.

[0013] Furthermore, an elastic sealing ring is provided between adjacent fin bodies.

[0014] The technical effects achieved by this utility model are as follows:

[0015] Initially, all fins are fitted together to form a flow channel for heat exchange. After a period of use, dirt accumulates inside the flow channel. Existing technologies typically involve disassembling all components and cleaning the fins one by one. This invention releases the pressure plate, then activates the drive assembly, which in turn rotates four rotating rods. Since the thread lead is the same but the number of thread turns is different (equivalent to different thread pitches), both threaded sleeves experience the same number of rotations during rotation. Therefore, the movement distance is directly proportional to the thread pitch. Threaded sleeves with larger pitches move a greater distance, while those with smaller pitches move a smaller distance. This results in relative movement between the two fins when the threaded sleeves move the corresponding fins, creating a certain distance between each pair of fins. Operators can use high-pressure water guns, chemical cleaning agent spray guns, brushes, etc., to directly and thoroughly clean all fin surfaces without disassembling any components. This device enables online, non-disassembly cleaning of plate-fin heat exchangers, significantly reducing maintenance costs and time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the fin body of this utility model during operation;

[0018] Figure 3 This is a schematic diagram of the structure of the drive component of this utility model;

[0019] Figure 4 This is a utility model Figure 3 A schematic diagram of the structure of A in the middle.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Support plate; 2. Limiting shaft; 3. Pressure plate; 4. Rotating rod; 5. Thread; 6. Threaded sleeve; 7. Fin body; 8. Slide groove; 9. Slide rod; 10. Connecting shaft; 11. Toothed pulley; 12. Transmission toothed belt; 13. Stepper motor; 14. Threaded rod. Detailed Implementation

[0022] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0023] like Figures 1-4 As shown, a novel plate-fin heat exchanger includes two support plates 1, two limiting shafts 2 are arranged between the two support plates 1, a pressure plate 3 is arranged on the limiting shaft 2, and a fin opening assembly is arranged on the pressure plate 3.

[0024] The fin opening assembly includes four symmetrically arranged rotating rods 4 disposed between two support plates 1. Each rotating rod 4 has multiple sets of threads 5 at one end. The multiple sets of threads 5 have the same lead but different number of turns. Each thread 5 is provided with a matching threaded sleeve 6. The fin body 7 is installed at the bottom of the threaded sleeve 6, and a drive assembly is provided on the four rotating rods 4.

[0025] Among them, the two limiting shafts 2 have a sliding groove 8 on the outside, and a fixed shaft is set inside the sliding groove 8. Multiple sliding rods 9 are sleeved on the fixed shaft and connected to multiple threaded sleeves 6 one by one.

[0026] The slide bar 9 is matched with the slide groove 8. This arrangement allows the slide bar 9 to move smoothly inside the slide groove 8 without getting stuck.

[0027] This design allows the sliding rod 9 to move within the groove 8 for limiting movement when the threaded sleeve 6 moves.

[0028] The threaded sleeve 6 is detachably connected to the fin body 7. This connection method can be threaded 5, snap-fit, etc., which are existing technologies and will not be elaborated on here.

[0029] It should be noted that the dimensions and distance of thread 5 in the figure are for ease of understanding. In actual production, the lead of thread 5 can be set to be very long, which will not be elaborated on here.

[0030] The drive assembly includes connecting shafts 10 mounted on four rotating rods 4. Each connecting shaft 10 is equipped with a toothed pulley 11, and a transmission toothed belt 12 is mounted on each of the four toothed pulleys 11. A stepper motor 13 is mounted on one of the toothed pulleys 11. The stepper motor 13 drives one of the toothed pulleys 11 to rotate, and the transmission toothed belt 12 drives the other toothed pulleys 11 to rotate, thereby causing the four rotating rods 4 to rotate.

[0031] One of the support plates 1 is equipped with a refrigerant inlet, a refrigerant outlet, a heat medium inlet, and a heat medium outlet. The refrigerant inlet allows cold material to enter the interior of the finned body 7, which is attached to the plate, and the heat medium inlet allows hot material to enter the interior of the finned body 7, which is attached to the plate, for heat exchange. Then, the refrigerant outlet and the heat medium outlet allow the cold and hot materials to be discharged.

[0032] The support plate 1 has a first threaded hole 5 and the pressure plate 3 has a second threaded hole 5. The first threaded hole 5 and the second threaded hole 5 are provided with threaded rods 14, and both ends of the threaded rods 14 are provided with locking nuts. This arrangement enables the pressure plate 3 to fix and press the fin body 7.

[0033] An elastic sealing ring (not shown in the figure) is provided between adjacent fin bodies 7 to achieve sealing under compression.

[0034] The working principle of this invention is as follows: Initially, all the fin bodies 7 are bonded together to form a flow channel for heat exchange. After a period of use, dirt accumulates inside the flow channel. In existing technologies, all components are typically disassembled, and the fin bodies 7 are cleaned piece by piece. This invention releases the pressure plate 3, then activates the drive assembly, which drives four rotating rods 4 to rotate. Since the threads 5 have the same lead but different number of turns, they are equivalent to different pitches. When they rotate, both threaded sleeves 6 experience the same number of rotations. Therefore, the movement distance is directly proportional to the pitch. Threaded sleeves 6 with larger pitches move a greater distance, and those with smaller pitches move a smaller distance. This results in the two fin bodies 7 moving relative to each other when the threaded sleeves 6 move, creating a certain distance between each pair of fin bodies 7. Operators can use high-pressure water guns, chemical cleaning agent spray guns, brushes, and other tools to directly and thoroughly clean all fin surfaces without disassembling any components. This device enables online, disassembly-free cleaning of plate-fin heat exchangers, greatly reducing maintenance costs and time consumption.

[0035] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A novel plate-fin heat exchanger, comprising two support plates (1), two limiting shafts (2) are provided between the two support plates (1), a pressure plate (3) is provided on the limiting shafts (2), and a fin opening assembly is provided on the pressure plate (3); Its features are: The fin opening assembly includes four symmetrically arranged rotating rods (4) between the two support plates (1). Each rotating rod (4) has multiple sets of threads (5) at one end. The threads (5) have the same lead but different number of turns. Each thread (5) is provided with a matching threaded sleeve (6). The fin body (7) is installed at the bottom of the threaded sleeve (6). The four rotating rods (4) are provided with a drive assembly.

2. The novel plate-fin heat exchanger according to claim 1, characterized in that: The two limiting shafts (2) are provided with a sliding groove (8) on the outside. A fixed shaft is provided inside the sliding groove (8). A plurality of sliding rods (9) are sleeved on the fixed shaft and connected to the plurality of threaded sleeves (6) one by one.

3. A novel plate-fin heat exchanger according to claim 2, characterized in that: The slide bar (9) is matched with the slide groove (8).

4. A novel plate-fin heat exchanger according to claim 1, characterized in that: The drive assembly includes connecting shafts (10) disposed on the four rotating rods (4), each connecting shaft (10) is provided with a toothed pulley (11), the four toothed pulleys (11) are provided with a transmission toothed belt (12), and one of the toothed pulleys (11) is provided with a stepper motor (13).

5. A novel plate-fin heat exchanger according to claim 1, characterized in that: One of the support plates (1) is provided with a refrigerant inlet, a refrigerant outlet, a heat medium inlet, and a heat medium outlet.

6. A novel plate-fin heat exchanger according to claim 1, characterized in that: The support plate (1) has a first threaded hole, and the pressure plate (3) has a second threaded hole. The first threaded hole and the second threaded hole are provided with threaded rods (14), and locking nuts are provided at both ends of the threaded rods (14).

7. A novel plate-fin heat exchanger according to claim 1, characterized in that: An elastic sealing ring is provided between adjacent fin bodies (7).

Images