Combined high-efficiency cooling damper

Abstract

A combined high-efficiency cooling buffer includes a gas buffer chamber with a gas inlet at its upper part. The gas buffer chamber contains a high-efficiency heat transfer tube bundle and a chamber flow guiding device. One end of the gas buffer chamber is connected to a low-temperature side heat exchange tube box, and the other end has a gas outlet. A gas flow stabilizing device is installed at the gas inlet. This invention improves heat transfer efficiency through the high-efficiency heat transfer tube bundle, eliminates inlet jetting through the gas flow stabilizing device, and eliminates flow dead zones through the chamber flow guiding device, thereby enhancing heat transfer efficiency.

Description

Technical Field

[0001] This utility model relates to the field of buffers, specifically a combined high-efficiency cooling buffer. Background Technology

[0002] During operation, reciprocating compressors are prone to strong pulsations in the gas at the cylinder outlet due to the periodic motion of the piston. This can not only cause pipeline vibration and increase the risk of equipment fatigue damage, but also reduce compression efficiency. To suppress pulsation, a buffer device (such as a pulsation damper or buffer tank) needs to be installed at the cylinder outlet. This absorbs the kinetic energy of the gas through the volume expansion effect, smooths out pressure fluctuations, and thus ensures stable system operation and extends equipment life.

[0003] In multi-stage compression systems, isothermal compression is the ideal process for optimizing energy consumption. According to thermodynamic theory, the work required for isothermal compression (constant gas temperature) is significantly lower than that for adiabatic compression (no cooling). However, the actual compression process is close to adiabatic, and the gas temperature rises significantly with increasing pressure, leading to increased compression power consumption. Therefore, forced cooling of the high-temperature gas is necessary through interstage coolers. The synergistic design of "buffering + cooling" is key to the efficient operation of reciprocating compressors: buffering devices suppress pulsations to maintain stability, while interstage cooling significantly reduces energy consumption through thermodynamic optimization. The combination of the two can achieve a dual improvement in safety and economy.

[0004] Currently, the buffer and cooler of reciprocating compressors on the market are usually designed independently, meaning the buffer tank and heat exchanger are arranged separately, and the cooler mostly uses a conventional shell-and-tube heat exchanger structure. This traditional approach has the following significant drawbacks: 1. Large footprint: Independent buffer tanks and coolers need to be installed separately, which not only increases the complexity of piping connections, but also occupies valuable factory space, especially for compact units or retrofit projects.

[0005] 2. Low heat transfer efficiency: Conventional heat exchanger tube designs are limited by the inherent heat transfer coefficient and flow channel layout, resulting in low heat transfer efficiency between the gas and the cooling medium. This leads to insufficient cooling, making it difficult to achieve the ideal isothermal compression effect and limiting the potential for energy consumption optimization.

[0006] 3. High system pressure drop: The gas flows through the buffer tank and cooler through multiple turns, which can easily generate additional resistance, increase the compressor exhaust back pressure, and further increase energy consumption.

[0007] 4. High maintenance costs: Separate equipment requires independent maintenance, which doubles the workload and increases the number of pipe flange connection points, raising the risk of leakage. Utility Model Content

[0008] To address the shortcomings of existing technologies, this invention provides a combined high-efficiency cooling buffer. This combined high-efficiency cooling buffer integrates high-efficiency heat exchange technology and buffering function into a single device, achieving synergistic optimization of compressed gas pulsation suppression and rapid cooling.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a combined high-efficiency cooling buffer, comprising a gas buffer cavity, a gas inlet at the top of the gas buffer cavity, a high-efficiency heat transfer tube bundle inside the gas buffer cavity, a low-temperature side heat exchange tube box connected to one end of the gas buffer cavity, and a gas outlet at the other end; a gas flow stabilizing device is provided at the gas inlet; a cavity flow guiding device is provided inside the gas buffer cavity; the low-temperature side heat exchange tube box has two independent cavities, one cavity has a cooling medium inlet, and the other cavity has a cooling medium outlet; the low-temperature side heat exchange tube box is internally connected to the high-efficiency heat transfer tube bundle, and the cooling medium enters one cavity of the low-temperature side heat exchange tube box through the cooling medium inlet, then enters the high-efficiency heat transfer tube bundle, circulates in the high-efficiency heat transfer tube bundle, returns to the other cavity of the low-temperature side heat exchange tube box, and is discharged through the cooling medium outlet.

[0010] The gas flow stabilizing device is connected to the gas inlet at the top and located in the gas buffer cavity at the bottom. The gas flow stabilizing device is cylindrical in shape, with a sealed bottom and a perforated plate structure on the side wall.

[0011] The high-efficiency heat transfer tube bundle consists of multiple sets of high-efficiency heat transfer elements. The high-efficiency heat transfer elements are U-shaped tubes. The end of the U-shaped tube is connected to the low-temperature side heat exchange tube box. The cooling medium enters the U-shaped tube from one cavity of the low-temperature side heat exchange tube box, circulates in the U-shaped tube, and then returns to the other cavity of the low-temperature side heat exchange tube box.

[0012] The high-efficiency heat transfer element is equipped with a slide rail, through which it is inserted into the gas buffer cavity; the high-efficiency heat transfer element consists of a U-shaped tube and external spiral fins on the outside of the tube to improve heat transfer efficiency.

[0013] The cavity flow guiding device is a three-dimensional spiral baffle structure. The cavity flow guiding device is set in the gap between the high-efficiency heat transfer tube bundle and the gas buffer cavity, which restricts the flow direction of the gas in the gas buffer cavity.

[0014] One end of the gas buffer cavity is provided with an inclined conical shell.

[0015] Beneficial effects

[0016] 1. Integrated high-efficiency heat transfer and pulsation suppression: The high-efficiency heat exchange tube structure significantly improves cooling efficiency, rapidly reducing gas temperature and minimizing compression power consumption. Optimized buffer chamber design and the addition of a gas flow stabilization device ensure sufficient effective volume and expansion effect, absorbing and consuming gas kinetic energy, effectively suppressing pressure pulsations, reducing pipeline vibration risks, and improving system stability.

[0017] 2. Compact design reduces space requirements: The integrated structure reduces pipe connections, lowers pressure drop losses, and saves installation space, making it especially suitable for space-constrained renovation projects or mobile compressor systems.

[0018] 3. Material saving and cost reduction: Through the modular structure, performance is optimized while significantly reducing material usage and manufacturing costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a schematic diagram of the gas buffer chamber of this utility model; Figure 3 This is a schematic diagram of the high-efficiency heat transfer tube bundle of this utility model; Figure 4 This is a schematic diagram of a single high-efficiency heat transfer element of this utility model; Figure 5 This is a partially enlarged schematic diagram of the high-efficiency heat transfer element of this utility model; Figure 6 This is a schematic diagram of the gas flow stabilizing device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the cavity guiding device according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the flow of the cooling medium on the low-temperature side and the cooled medium on the high-temperature side in an embodiment of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1The combined high-efficiency cooling buffer shown includes a gas buffer chamber, a gas inlet at the top of the gas buffer chamber, a high-efficiency heat transfer tube bundle 4 inside the gas buffer chamber, a low-temperature side heat exchange tube box 1 connected to one end of the gas buffer chamber, and a gas outlet at the other end; a gas flow stabilizing device 3 is provided at the gas inlet; and a chamber flow guiding device 5 is provided inside the gas buffer chamber.

[0022] The low-temperature heat exchanger box 1 has two independent cavities inside. One cavity has a cooling medium inlet, and the other cavity has a cooling medium outlet. The low-temperature heat exchanger box 1 is internally connected to the high-efficiency heat transfer tube bundle 4. The cooling medium enters one cavity of the low-temperature heat exchanger box 1 through the cooling medium inlet, then enters the high-efficiency heat transfer tube bundle 4, circulates in the high-efficiency heat transfer tube bundle 4, and returns to the other cavity of the low-temperature heat exchanger box 1, and is discharged through the cooling medium outlet.

[0023] like Figures 3-5 As shown, the high-efficiency heat transfer tube bundle 4 consists of multiple sets of high-efficiency heat transfer elements. Each high-efficiency heat transfer element is a U-shaped tube, with its end connected to the low-temperature side heat exchanger box 1. The cooling medium enters the U-shaped tube from one cavity of the low-temperature side heat exchanger box 1, circulates within the U-shaped tube, and then returns to the other cavity of the low-temperature side heat exchanger box 1. A slide is provided at the connection end between the high-efficiency heat transfer element and the low-temperature side heat exchanger box 1, through which it is inserted into the gas buffer cavity 2. The high-efficiency heat transfer element consists of a U-shaped tube body 4-1 and external spiral fins 4-2 disposed outside the tube body 4-1 to improve heat transfer efficiency.

[0024] The high-efficiency heat transfer tube bundle 4 achieves breakthroughs in heat transfer efficiency, compactness, and reliability. A sliding track at the bottom of the bundle facilitates disassembly. The high-efficiency heat transfer tube bundle 4 is a special heat exchange element that significantly improves heat transfer efficiency by adding external spiral fins 4-2 to the surface of the tube body 4-1 to extend the heat transfer surface. Its core functions include: enhanced heat transfer: increasing the heat transfer area (up to 3-20 times that of a bare tube) and disturbing the fluid boundary layer through fins; and compact design: the heat transfer area per unit volume far exceeds that of a bare tube, reducing equipment size and manufacturing costs.

[0025] like Figure 6 As shown, the upper part of the gas flow stabilizing device 3 is connected to the gas inlet, and the lower part is located in the gas buffer cavity. The gas flow stabilizing device 3 is cylindrical in shape, with its bottom sealed. The side wall is a perforated plate structure, composed of a metal plate with uniform small holes. The flow velocity is balanced by the resistance of the holes, which alleviates the problem of unstable fluid flow, eliminates inlet jets, eddies or velocity gradients, and makes the fluid enter the equipment uniformly.

[0026] like Figure 2 and Figure 7As shown, the cavity flow guiding device 5 is a three-dimensional spiral baffle structure. It is positioned in the gap between the high-efficiency heat transfer tube bundle 4 and the gas buffer cavity to prevent short-circuiting of the gas during cooling. By forcing the fluid to flow along a spiral trajectory, axial flow is converted into spiral motion, eliminating dead zones, improving heat / mass transfer efficiency, and suppressing gas-induced vibration.

[0027] The gas buffer chamber has a conical shell 2 at one end. The combination of the cone and the chamber replaces the traditional end cap. According to the requirements of pressure equipment specifications, the openings on the end cap must meet the reinforcement requirements, and the opening diameter is usually no more than 50% of the inner diameter of the end cap (the specific ratio depends on the type of end cap and the pressure rating). Large-diameter openings require additional reinforcement (such as reinforcing rings or thick-walled nozzles), increasing material costs and manufacturing processes.

[0028] When using, such as Figure 8 As shown, high-temperature gas enters the equipment through the upper inlet of the gas buffer chamber. This inlet is equipped with a gas flow stabilizing device (3), which, through a perforated plate structure, alleviates the instability of fluid flow while ensuring the effective volume and expansion effect of the chamber, absorbing gas kinetic energy, and effectively suppressing pressure pulsations. The gas undergoes heat exchange through finned heat exchange tubes, where the high-temperature gas transfers heat to the fins, which is then further carried away by the cold-side medium. Under the action of the chamber flow guiding device (5) and the effective volume, the high-temperature gas can fully contact the finned heat exchange tubes, increasing the residence time of the gas in the chamber, enhancing the cooling effect of the high-temperature gas, and achieving the purpose of gas buffering.

Claims

1. A combined high-efficiency cooling buffer, comprising a gas buffer chamber, characterized in that: A gas inlet is provided at the top of the gas buffer chamber, and a high-efficiency heat transfer tube bundle (4) is provided inside the gas buffer chamber. One end of the gas buffer chamber is connected to a low-temperature side heat exchange tube box (1), and the other end is provided with a gas outlet. A gas flow stabilizing device (3) is provided at the gas inlet. A cavity flow guiding device (5) is provided inside the gas buffer chamber. The low-temperature side heat exchange tube box (1) has two independent cavities inside. One cavity has a cooling medium inlet, and the other cavity has a cooling medium outlet. The low-temperature side heat exchange tube box (1) is internally connected to the high-efficiency heat transfer tube bundle (4). The cooling medium enters one cavity of the low-temperature side heat exchange tube box (1) through the cooling medium inlet, and then enters the high-efficiency heat transfer tube bundle (4). After circulating in the high-efficiency heat transfer tube bundle (4), it returns to the other cavity of the low-temperature side heat exchange tube box (1) and is discharged through the cooling medium outlet.

2. The combined high-efficiency cooling buffer according to claim 1, characterized in that: The gas flow stabilizing device (3) is connected to the gas inlet at the top and is located in the gas buffer cavity at the bottom. The gas flow stabilizing device (3) is cylindrical in shape, with its bottom sealed and its side wall being a perforated plate structure.

3. The combined high-efficiency cooling buffer according to claim 1, characterized in that: The high-efficiency heat transfer tube bundle (4) consists of multiple sets of high-efficiency heat transfer elements. The high-efficiency heat transfer elements are U-shaped tubes. The end of the U-shaped tube is connected to the low-temperature side heat exchange tube box (1). The cooling medium enters the U-shaped tube from one cavity of the low-temperature side heat exchange tube box (1), circulates in the U-shaped tube, and then returns to the other cavity of the low-temperature side heat exchange tube box (1).

4. The combined high-efficiency cooling buffer according to claim 3, characterized in that: The high-efficiency heat transfer element is provided with a slide rail, which is inserted into the gas buffer cavity; the high-efficiency heat transfer element consists of a U-shaped tube (4-1) and external spiral fins (4-2) provided on the outside of the tube (4-1) to improve heat transfer efficiency.

5. A combined high-efficiency cooling buffer according to claim 1, characterized in that: The cavity flow guiding device (5) is a three-dimensional spiral baffle structure. The cavity flow guiding device (5) is set in the gap between the high-efficiency heat transfer tube bundle (4) and the gas buffer cavity, which restricts the flow direction of the gas in the gas buffer cavity.

6. A combined high-efficiency cooling buffer according to claim 1, characterized in that: The gas buffer cavity is provided with a slanted conical shell (2) at one end.

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