Low pressure circulating barrel for barrel pump unit

Abstract

The utility model provides a low pressure circulation barrel for barrel pump unit belongs to refrigeration equipment technical field. Including: the barrel body, is equipped with the air inlet in the barrel body top portion, gas -liquid separation subassembly, including with the air inlet bottom intercommunication's connecting pipe, fixed setting in the connecting pipe inner wall lower portion between's loudspeaker cover, fixed setting in the connecting pipe outer wall upper portion between's umbrella -shaped fender cover, be located in the connecting pipe below's liquid collecting box, be located in the liquid collecting box inboard's bubble breaking board tooth. The utility model constructs the multistage gas -liquid separation process of impact - settlement - bubble breaking - overflow - filtration, high -speed gas -liquid mixture first impact umbrella -shaped fender cover, realize the preliminary inertia separation, then carry out gravity settlement in the liquid collecting box, match bubble breaking board tooth and constantly break the foam gathered in the liquid collecting box, greatly accelerate the escape of bubble and the clarification speed of liquid, effectively solved the problem that the foam accumulation influences separation efficiency, to avoid leading to a large amount of liquid to be carried in the ascending airflow, and the separation efficiency is higher.

Description

Technical Field

[0001] This utility model provides a low-pressure circulating tank for a tank pump unit, belonging to the field of refrigeration equipment technology. Background Technology

[0002] In large-scale industrial refrigeration, especially in ammonia pump supply systems, the low-pressure circulating tank is an indispensable core component. Its main function is to act as a liquid storage and separation container on the low-pressure side, receiving the gas-liquid two-phase refrigerant from the evaporator and the throttled gas-liquid refrigerant on the high-pressure side of the system, performing effective gas-liquid separation, and ensuring that the compressor draws in dry, saturated gaseous refrigerant. This prevents wet stroke or liquid slugging accidents caused by liquid entering the compressor, thereby ensuring the safe, efficient, and stable operation of the entire refrigeration system.

[0003] Existing low-pressure circulating tanks are typically vertical or horizontal cylindrical pressure vessels with simple internal baffles, deflectors, or umbrella-shaped shrouds, relying mainly on gravity settling and flow direction changes to achieve gas-liquid separation. However, this traditional design has several shortcomings in practical applications: limited gas-liquid separation efficiency: when the refrigeration system load fluctuates significantly, or when the amount of liquid carried back by the evaporator suddenly increases, the gas-liquid mixture entering the circulating tank is fast and flows at high speeds, making it difficult for the traditional simple internal components to achieve efficient separation; poor foam suppression capability: during the decompression, boiling, and agitation of the refrigerant, especially when it contains trace amounts of lubricating oil, a large amount of stable foam is easily generated. This foam accumulates above the liquid surface, not only occupying the effective gas-liquid separation space and causing a sharp drop in separation efficiency, but more seriously, if the foam layer does not break in time, a large amount of liquid will be entrained in the rising airflow. Based on this, this utility model provides a low-pressure circulating tank for a tank pump unit. Utility Model Content

[0004] The technical problem solved by this invention is that the efficiency of traditional gas-liquid separation relying solely on gravity is relatively limited, the foam suppression ability is poor, the foam accumulation above the liquid surface affects the separation efficiency, and a large amount of liquid is easily entrained in the rising airflow.

[0005] To solve the technical problem, the technical solution provided by this utility model is: a low-pressure circulating tank for a tank pump unit, comprising: The barrel body has an air inlet at the top. The gas-liquid separation assembly is located inside the tank and includes a pipe connected to the bottom of the air inlet, a horn cover fixedly installed between the lower inner walls of the pipe, an umbrella-shaped baffle fixedly installed between the upper outer walls of the pipe, a liquid collection box located below the pipe, a bubble-breaking plate tooth located inside the liquid collection box, and a pair of support rods fixedly installed between the bottom of the liquid collection box and the bottom of the pipe. The support rods are provided with auxiliary parts that are elastically connected to the bubble-breaking plate tooth.

[0006] Furthermore, the two ends of the bubble-breaking plate teeth are provided with through holes for the support rod to pass through. The auxiliary part includes a hollow rod fixedly mounted on the support rod. A spring is provided at the top of the hollow rod. A sliding plate is provided at the bottom of the spring and slidably connected to the inner side wall of the hollow rod. A connecting rod is provided at the bottom of the sliding plate, passing through the bottom of the hollow rod and fixedly connected to the top of the bubble-breaking plate teeth.

[0007] Furthermore, the inner sidewall of the hollow rod is symmetrically provided with limiting rails that match the sidewall of the sliding plate.

[0008] Furthermore, the large opening of the horn cover faces upwards towards the pipe, and the top circumference of the liquid collection box is provided with several overflow grooves.

[0009] Furthermore, an air outlet is provided on one side of the top of the barrel, and a wire mesh demister is placed inside the barrel at the bottom of the air outlet.

[0010] Furthermore, the top of the barrel is provided with a liquid supply port, and the bottom of the barrel is provided with a liquid outlet.

[0011] The beneficial effects of this invention are as follows: This invention constructs a multi-stage gas-liquid separation process of impact-sedimentation-bubble breaking-overflow-filtration. The high-speed gas-liquid mixture first impacts the umbrella-shaped baffle to achieve preliminary inertial separation, and then undergoes gravity sedimentation in the collection box. Combined with the continuous puncture and crushing of the foam collected in the collection box by the bubble-breaking plate teeth, the escape of bubbles and the clarification speed of liquid are greatly accelerated, effectively solving the problem of foam accumulation affecting separation efficiency, and preventing a large amount of liquid from being entrained in the rising airflow, resulting in higher separation efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic plan view of the entire utility model.

[0014] Figure 3 This is a schematic diagram of the gas-liquid separation component of this utility model. Figure 1 .

[0015] Figure 4 This is a schematic diagram of the gas-liquid separation component of this utility model. Figure 2 .

[0016] Figure 5 This is a partial structural diagram of the gas-liquid separation component of this utility model.

[0017] Figure 6 This is a plan view of the auxiliary part of this utility model.

[0018] 1. Barrel body; 2. Air inlet; 3. Gas-liquid separation component; 4. Connecting pipe; 5. Horn cover; 6. Umbrella-shaped baffle; 7. Liquid collection box; 8. Bubble-breaking plate teeth; 9. Support rod; 10. Auxiliary part; 11. Hollow rod; 12. Spring; 13. Slide plate; 14. Connecting rod; 15. Limiting rail; 16. Overflow groove; 17. Air outlet; 18. Wire mesh demister; 19. Liquid supply port; 20. Liquid outlet. Detailed Implementation

[0019] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.

[0020] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.

[0021] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] According to the appendix Figure 1 , 2As shown: This utility model provides a low-pressure circulating tank for a barrel pump unit, comprising: a tank body 1, which serves as a pressure vessel. The material selection and manufacturing process of the tank body 1 must comply with relevant pressure vessel standards. For example, high-quality steel such as Q245R or Q345R can be selected. The wall thickness is calculated and determined based on the design pressure (e.g., 1.6MPa) and the container diameter, and is manufactured through welding, flaw detection, and other processes to ensure its pressure-bearing capacity and sealing performance. An air inlet 2 is provided at the top of the tank body 1 to receive the gas-liquid two-phase refrigerant from the evaporator in the refrigeration system. An air outlet 17 is provided on one side of the top of the tank body 1 to discharge the gaseous refrigerant to the compressor. The bottom of the barrel 17 is equipped with a wire mesh demister 18 placed inside the barrel 1. The wire mesh demister 18 is fixedly installed on an annular bracket, which is welded to the inner wall of the barrel 1. As the last barrier, the wire mesh demister 18 can effectively capture tiny droplets entrained in the airflow, ensuring that the gas output to the compressor is extremely dry. The top of the barrel 1 is equipped with a liquid supply port 19, which is used to receive low-temperature refrigerant liquid from the high-pressure side of the barrel pump unit after throttling and pressure reduction. The bottom of the barrel 1 is equipped with a liquid outlet 20, which is used to supply liquid refrigerant to the refrigerant pump of the barrel pump unit. The specific connection pipeline can be obtained based on existing technology, and will not be described in detail here.

[0023] As per the instruction manual Figure 2 , 3 As shown in Figures 4 and 5: The gas-liquid separation component 3 is installed inside the tank 1 and includes a pipe 4 connected to the bottom of the air inlet 2, a horn cover 5 fixedly installed between the lower inner walls of the pipe 4, an umbrella-shaped baffle 6 fixedly installed between the upper outer walls of the pipe 4, a liquid collection box 7 located below the pipe 4, a bubble-breaking plate tooth 8 located inside the liquid collection box 7, and a pair of support rods 9 fixedly installed between the bottom of the liquid collection box 7 and the bottom of the pipe 4. The large opening of the horn cover 5 faces upwards from the pipe 4, and the top circumference of the liquid collection box 7 is provided with several overflow grooves 16. Specifically, the horn cover 5 is designed to guide gas flow and prevent liquid from splashing, and the overflow grooves 16 of the liquid collection box 7 allow the liquid that has undergone bubble-breaking treatment to overflow smoothly, avoiding large disturbances to the main liquid pool inside the tank 1.

[0024] As per the instruction manual Figure 2 , 4As shown in Figure 6: The support rod 9 is provided with an auxiliary part 10 that is elastically connected to the bubble-breaking plate teeth 8. The two ends of the bubble-breaking plate teeth 8 are provided with through holes for the support rod 9 to pass through. The auxiliary part 10 includes a hollow rod 11 fixedly installed on the support rod 9. A spring 12 is provided at the top of the hollow rod 11. A sliding plate 13 is provided at the bottom of the spring 12 that is slidably connected to the inner side wall of the hollow rod 11. The inner side wall of the hollow rod 11 is symmetrically provided with limiting rails 15 that match the side wall of the sliding plate 13, which serve to limit the sliding plate 13. The bottom of the sliding plate 13 is provided with a connecting rod 14 that passes through the bottom of the hollow rod 11 and is fixedly connected to the top of the bubble-breaking plate teeth 8. Specifically, the liquid collection box 7 is an annular or square box used to temporarily contain liquid, so that the bubble-breaking plate teeth 8 can respond to the impact and pressure pulsation of the fluid and vibrate slightly.

[0025] The principle of this utility model Primary inertial separation: The gas-liquid mixture flows downward through the inlet 2 and the pipe 4. It first impacts the umbrella-shaped baffle 6 fixed on the outer wall of the pipe 4. The conical surface of the umbrella-shaped baffle 6 forces the fluid to change direction and decelerate rapidly. By utilizing the density and inertia difference between the droplets and the gas, most of the heavier droplets are thrown downward, achieving the first coarse separation. Collection and active bubble breaking: The liquid that is thrown off and the large amount of foam generated thereafter fall into the collection box 7 located directly below the nozzle 4 to temporarily contain the liquid. The gas blown out from the nozzle 4 impacts the bubble breaking plate teeth 8, and the fluid flow in the collection box 7 generates turbulence or pressure pulsation. These dynamic forces act on the bubble breaking plate teeth 8, causing them to overcome the elastic force of the spring 12 and vibrate up and down at a high frequency and a small amplitude. The sharp teeth on the bubble breaking plate teeth 8 can continuously and actively puncture and tear the foam structure, greatly accelerating the release of gas and the clarification process of the liquid. Secondary separation and steady overflow: After the bubble breaking process, the relatively pure liquid accumulates in the collection box 7. When the liquid level exceeds the overflow groove 16 at the top of the collection box 7, the liquid will overflow smoothly and evenly from all sides and flow into the total liquid pool at the bottom of the tank 1. This overflow method avoids directly impacting the main liquid pool and generating new bubbles and disturbances. Gas purification and exhaust: Meanwhile, after primary separation, most of the gas carries a small amount of fine droplets upwards. The horn cover 5 located at the lower end of the inside of the connector 4 can effectively prevent the liquid in the connector 4 from splashing upwards due to unstable flow and contaminating the rising gas. The gas continues to rise to the top space of the tank 1 and must pass through the horizontally installed wire mesh demister 18 before entering the outlet 17. The wire mesh demister 18 is made of multiple layers of stainless steel wire mesh pressed together. Its huge specific surface area can effectively capture and condense the last remaining tiny droplets entrained in the airflow. After the droplets condense and grow larger, they fall back into the tank due to gravity and are finally discharged from the outlet 17.

[0026] In summary, this invention constructs a multi-stage gas-liquid separation process of impact-sedimentation-bubble breaking-overflow-filtration. The high-speed gas-liquid mixture first impacts the umbrella-shaped baffle 6 to achieve initial inertial separation, and then undergoes gravity sedimentation in the collection box 7. With the auxiliary part 10 elastically connected to the bubble-breaking plate teeth 8, the bubble-breaking plate teeth 8 continuously puncture and break up the foam collected in the collection box 7, greatly accelerating the escape of bubbles and the clarification speed of the liquid. This effectively solves the problem of foam accumulation affecting separation efficiency, and prevents a large amount of liquid from being entrained in the rising airflow. The separated gas rises and is finally finely filtered by the wire mesh demister 18. This multi-stage series separation method has a higher separation efficiency than the traditional single gravity separation.

[0027] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A low-pressure circulating tank for a tank pump unit, characterized in that, include: The barrel (1) has an air inlet (2) at the top. The gas-liquid separation assembly (3) is located inside the barrel (1) and includes a pipe (4) connected to the bottom of the air inlet (2), a horn cover (5) fixedly installed between the lower part of the inner wall of the pipe (4), an umbrella-shaped baffle (6) fixedly installed between the upper part of the outer wall of the pipe (4), a liquid collection box (7) located below the pipe (4), a bubble-breaking plate tooth (8) located inside the liquid collection box (7), and a pair of support rods (9) fixedly installed between the bottom of the liquid collection box (7) and the bottom of the pipe (4). The support rods (9) are provided with an auxiliary part (10) that is elastically connected to the bubble-breaking plate tooth (8).

2. The low-pressure circulating tank for a tank pump unit according to claim 1, characterized in that: The bubble-breaking plate teeth (8) are provided with through holes at both ends for the support rod (9) to pass through. The auxiliary part (10) includes a hollow rod (11) fixedly installed on the support rod (9). A spring (12) is provided at the top inside the hollow rod (11). A sliding plate (13) is provided at the bottom of the spring (12) and is slidably connected to the inner side wall of the hollow rod (11). A connecting rod (14) is provided at the bottom of the sliding plate (13) that passes through the bottom of the hollow rod (11) and is fixedly connected to the top of the bubble-breaking plate teeth (8).

3. The low-pressure circulating tank for a tank pump unit according to claim 2, characterized in that: The hollow rod (11) has symmetrically provided limiting rails (15) on its inner sidewall that match the sidewall of the slide plate (13).

4. The low-pressure circulating tank for a tank pump unit according to claim 1, characterized in that: The large opening of the horn cover (5) faces the top of the pipe (4), and the top circumference of the liquid collection box (7) is provided with several overflow grooves (16).

5. A low-pressure circulating tank for a tank pump unit according to claim 1, characterized in that: The top side of the barrel (1) is provided with an air outlet (17), and the bottom of the air outlet (17) is provided with a wire mesh demister (18) placed inside the barrel (1).

6. A low-pressure circulating tank for a tank pump unit according to claim 1, characterized in that: The top of the barrel (1) is provided with a liquid inlet (19), and the bottom of the barrel (1) is provided with a liquid outlet (20).

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