Dry screw vacuum pump circulation cooling device

Abstract

The utility model relates to a vacuum pump cooling technical field, concretely is a kind of dry screw vacuum pump circulating cooling device, including frame body, dry screw vacuum pump is installed on the frame body, dry screw vacuum pump is connected heat exchanger by circulating water inlet pipe, and heat exchanger is connected on dry screw vacuum pump by circulating water outlet pipe;The heat exchanger is connected condenser by second medium pipe, and the condenser is connected refrigerant compressor by first medium pipe, and the refrigerant compressor is connected heat exchanger by third medium pipe;The condenser is connected with refrigerant tank.The utility model provides a kind of dry screw vacuum pump circulating cooling device, with two independent closed circulation, can be maintained free;Each structure is relatively compact and is modular design, effectively utilizes space;Realize dry screw vacuum pump self-cooling, can be used in most harsh scenes without cooling water etc.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump cooling technology, and in particular to a dry screw vacuum pump circulating cooling device. Background Technology

[0002] With the continuous development of the manufacturing industry and the accelerating pace of industrial upgrading, the requirements for production equipment and processes are becoming increasingly stringent in many emerging manufacturing fields and high-end segments of traditional manufacturing. Vacuum pumps, as key equipment in numerous industrial production processes, have an extremely wide range of applications, covering industries such as electronics and semiconductor manufacturing, chemicals, pharmaceuticals, and food packaging. They play an irreplaceable role in achieving vacuum environments and ensuring the stable operation of production processes. With the further upgrading of the manufacturing industry, the demand for vacuum pumps from various industries in China is showing a sustained and robust growth trend, requiring not only greater quantity but also higher standards in terms of performance and stability.

[0003] Currently, most commercially available vacuum pumps rely primarily on cooling water for heat dissipation during operation. The cooling water, through a specific circulation system, removes the heat generated during pump operation, maintaining the equipment within a suitable temperature range and ensuring stable performance and lifespan. However, in real-world industrial applications, there are numerous special environments where cooling water is unavailable. Examples include temporary production facilities in the field, small processing sites in remote areas, or enclosed workshops with strict water conservation requirements and lacking a cooling water supply.

[0004] When vacuum pumps are deployed in environments without cooling water, the internal temperature rises rapidly due to the lack of effective heat dissipation. Excessive temperature causes thermal expansion of internal components, altering the clearances between parts and potentially leading to pump jamming and malfunction. Simultaneously, high temperatures affect the performance of the lubricating oil, reducing lubrication effectiveness, accelerating wear on components, and further disrupting normal equipment operation. Furthermore, abnormally high temperatures increase the resistance of the motor windings. According to Ohm's law, with constant voltage, increased resistance inevitably leads to excessive current, causing the vacuum pump to operate under overload. This not only severely impacts the pump's efficiency and product quality but also significantly shortens its lifespan, increases maintenance costs and the risk of production interruptions, causing numerous adverse effects on industrial production.

[0005] In view of the above, in order to enable the vacuum pump to operate normally and stably in the absence of cooling water, it is urgent to add an effective cooling device to solve the heat dissipation problem of the vacuum pump in special application scenarios and meet the ever-increasing industrial production needs. Utility Model Content

[0006] In view of the above-mentioned defects, the purpose of this utility model is to provide a dry screw vacuum pump circulating cooling device to solve the problems of vacuum pumps not being able to operate normally and stably in scenarios without cooling water, and the difficulty in heat dissipation.

[0007] To achieve the above objectives, this utility model provides a dry screw vacuum pump circulating cooling device, including a frame on which a dry screw vacuum pump is installed. The dry screw vacuum pump is connected to a heat exchanger through a circulating water inlet pipe, and the heat exchanger is connected to the dry screw vacuum pump through a circulating water outlet pipe. The heat exchanger is connected to the condenser via a second medium pipe, the condenser is connected to the refrigerant compressor via a first medium pipe, and the refrigerant compressor is connected to the heat exchanger via a third medium pipe; the condenser is connected to a refrigerant tank.

[0008] As a preferred technical solution, the dry screw vacuum pump is connected to a filter through a circulating water inlet pipe, and the filter is connected to a heat exchanger through a water pipe.

[0009] As a preferred technical solution, a water circulation pump is installed on the water pipe.

[0010] As a preferred technical solution, the heat exchanger includes a shell, inside which a conical cylinder is disposed, dividing the interior of the shell into a first heat exchange chamber and a second heat exchange chamber; a spiral coil is disposed on the outer side of the conical cylinder; the spiral coil is located inside the first heat exchange chamber.

[0011] As a preferred technical solution, the top of the conical cylinder is provided with an opening, and a number of refrigerant inlets arranged in a ring are provided on the side wall of the conical cylinder near the opening.

[0012] As a preferred technical solution, a refrigerant outlet pipe is provided below the refrigerant inlet, and the refrigerant outlet pipe extends into the conical cylinder with its opening facing downwards.

[0013] As a preferred technical solution, the refrigerant outlet pipe is n-shaped.

[0014] As a preferred technical solution, the refrigerant outlet pipe is an integrally formed structure, including an inner pipe and an outer pipe, wherein the diameter of the inner pipe is smaller than the diameter of the outer pipe.

[0015] As a preferred technical solution, the shell is provided with a water inlet, a water outlet, a liquid refrigerant inlet, and a liquid refrigerant outlet, wherein the water outlet and the liquid refrigerant inlet are located at the upper part of the shell, and the water inlet and the liquid refrigerant outlet are located at the lower part of the shell; the liquid refrigerant inlet is connected to the first heat exchange chamber, the liquid refrigerant outlet is connected to the second heat exchange chamber, the inlet of the spiral coil is connected to the water inlet, and the outlet is connected to the water outlet.

[0016] This invention provides a circulating cooling device for a dry screw vacuum pump, which has two independent closed-loop circulations, making it maintenance-free; the various structures are relatively compact and modularly designed, making effective use of space; it enables the dry screw vacuum pump to self-cool, and can be used in most harsh scenarios where there is no cooling water. Attached Figure Description

[0017] Figure 1 This is a front view of the dry screw vacuum pump circulating cooling device of this utility model; Figure 2 This is a top view of the dry screw vacuum pump circulating cooling device of this utility model; Figure 3 This is a left view of the circulating cooling device for the dry screw vacuum pump of this utility model; Figure 4 This is a schematic diagram of the structure of the dry screw vacuum pump circulating cooling device of this utility model; Figure 5 This is a schematic diagram of the circulating cooling device for the dry screw vacuum pump of this utility model from another perspective. Figure 6 This is a schematic diagram of a heat exchanger. Figure 7 This is a schematic diagram of the refrigerant outlet pipe. In the picture: 1-Dry screw vacuum pump, 2-Refrigerant compressor, 3-Electrical control cabinet, 4-Frame, 5-Circulating water outlet pipe, 6-Heat exchanger, 7-Water pipe, 8-Water circulation pump, 9-Water filter, 10-Circulating water inlet pipe, 11-First medium pipe, 12-Second medium pipe, 13-Condenser, 14-Third medium pipe, 15-Refrigerant tank, 61-Shell, 62-Spiral coil, 63-Inlet, 64-Outlet, 65-Liquid refrigerant inlet, 66-Liquid refrigerant outlet, 661-Refrigerant outlet pipe, 6611-Inner pipe, 6612-Outer pipe, 67-Conical cylinder, 68-Opening, 69-Refrigerant inlet hole. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0019] Example 1: See Figures 1-5This utility model provides a dry screw vacuum pump circulating cooling device, including a frame 4, on which a dry screw vacuum pump 1 is mounted. The dry screw vacuum pump 1 is connected to a heat exchanger 6, and a circulating water outlet pipe 5 is provided on the top of the heat exchanger 6. The circulating water outlet pipe 5 is connected to the dry screw vacuum pump 1. Specifically, the dry screw vacuum pump 1 is connected to a filter 9 through a circulating water inlet pipe 10, and the filter 9 is connected to the heat exchanger 6 through a water pipe 7. A water circulation pump 8 is installed on the water pipe 7.

[0020] The heat exchanger 6 is connected to the condenser 13 via the second medium pipe 12. The condenser 13 is connected to the refrigerant compressor 2 via the first medium pipe 11. The refrigerant compressor 2 is connected to the heat exchanger 6 via the third medium pipe 14. The condenser 13 is connected to a refrigerant tank 15.

[0021] An electrical control cabinet 3 is also installed on the frame 4.

[0022] During operation, the hot water in the dry screw vacuum pump 1 enters the heat exchanger 6 through the circulating water inlet pipe 10, filter 9 and water circulation pump 8, and exchanges heat with the refrigerant in the heat exchanger 6. Then, under the action of the water circulation pump 8, it is re-pressurized into the dry screw vacuum pump 1, thereby realizing the closed circulation of water. The gaseous refrigerant enters the condenser 13 after passing through the refrigerant compressor 2, and then condenses into a liquid state. The liquid refrigerant enters the heat exchanger 6 through the third medium pipe 14 and exchanges heat with the liquid water in the dry screw vacuum pump 1. At the same time, the refrigerant absorbs heat and vaporizes before re-entering the refrigerant compressor 2, thus realizing a closed-loop circulation of the refrigerant.

[0023] See Figure 6 and Figure 7 The heat exchanger 6 includes a housing 61, on which a water inlet 63, a water outlet 64, a liquid refrigerant inlet 65, and a liquid refrigerant outlet 66 are provided. The water outlet 64 and the liquid refrigerant inlet 65 are located at the upper part of the housing 61, while the water inlet 63 and the liquid refrigerant outlet 66 are located at the lower part of the housing 61.

[0024] The housing 61 is provided with a conical cylinder 67 inside, which divides the interior of the housing 61 into a first heat exchange chamber 6A and a second heat exchange chamber 6B. The liquid refrigerant inlet 65 is connected to the first heat exchange chamber 6A.

[0025] A spiral coil 62 is provided on the outer side of the conical cylinder 67. The inlet of the spiral coil 62 is connected to the water inlet 63, and the outlet is connected to the water outlet 64.

[0026] The conical cylinder 67 has an opening 68 at its top. Several refrigerant inlet holes 69 arranged in a ring are located on the side wall of the conical cylinder 67 near the opening 68. A refrigerant outlet pipe 661 is located below the refrigerant inlet holes 69, connecting to a liquid refrigerant outlet 66. The refrigerant outlet pipe 661 extends into the conical cylinder 67 in an n-shape with its opening facing downwards. The refrigerant outlet pipe 661 is a one-piece structure, comprising an inner pipe 6611 and an outer pipe 6612. The diameter of the inner pipe 6611 is smaller than that of the outer pipe 6612, allowing the liquid refrigerant in the second heat exchange chamber 6B to flow out slowly.

[0027] Hot water from the dry screw vacuum pump 1 enters the spiral coil 62 through inlet 63 and exits through outlet 64. Liquid refrigerant enters the first heat exchange chamber 6A through liquid refrigerant inlet 65. As the liquid refrigerant accumulates in the first heat exchange chamber 6A to the refrigerant inlet 69, it falls into the second heat exchange chamber 6B. Because the diameter of the inner tube 6611 is smaller than that of the outer tube 6612, the liquid refrigerant flows out of the second heat exchange chamber 6B more slowly, further improving the heat exchange efficiency of the hot water in the spiral coil 62. Finally, the refrigerant in the second heat exchange chamber 6B is discharged through the inner tube 6611, outer tube 6612, and liquid refrigerant outlet 66. Through the arrangement of the first heat exchange chamber 6A and the second heat exchange chamber 6B, the hot water located at different positions inside and outside, and above and below, of the spiral coil 62 undergoes secondary heat exchange, improving heat exchange efficiency.

[0028] This invention provides a circulating cooling device for a dry screw vacuum pump, featuring two independent closed-loop circulation systems, enabling maintenance-free operation. The devices are relatively compact and modularly designed, effectively utilizing space. They achieve self-cooling for the dry screw vacuum pump, allowing for use in most harsh environments where cooling water is unavailable. The cooperation between the two heat exchange chambers and the heat exchange coils within the heat exchanger significantly improves heat exchange efficiency.

[0029] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A dry screw vacuum pump circulating cooling device, comprising a frame (4), characterized in that, A dry screw vacuum pump (1) is installed on the frame (4). The dry screw vacuum pump (1) is connected to a heat exchanger (6) through a circulating water inlet pipe (10). The heat exchanger (6) is connected to the dry screw vacuum pump (1) through a circulating water outlet pipe (5). The heat exchanger (6) is connected to the condenser (13) through the second medium pipe (12), the condenser (13) is connected to the refrigerant compressor (2) through the first medium pipe (11), and the refrigerant compressor (2) is connected to the heat exchanger (6) through the third medium pipe (14); the condenser (13) is connected to a refrigerant tank (15).

2. The dry screw vacuum pump circulating cooling device according to claim 1, characterized in that, The dry screw vacuum pump (1) is connected to the filter (9) through the circulating water inlet pipe (10), and the filter (9) is connected to the heat exchanger (6) through the water pipe (7).

3. The dry screw vacuum pump circulating cooling device according to claim 2, characterized in that, A water circulation pump (8) is installed on the water pipe (7).

4. The dry screw vacuum pump circulating cooling device according to claim 1, characterized in that, The heat exchanger (6) includes a housing (61), inside which a conical cylinder (67) is provided, dividing the interior of the housing (61) into a first heat exchange chamber (6A) and a second heat exchange chamber (6B); a spiral coil (62) is provided on the outside of the conical cylinder (67); the spiral coil (62) is located inside the first heat exchange chamber (6A).

5. The dry screw vacuum pump circulating cooling device according to claim 4, characterized in that, The top of the conical cylinder (67) is provided with an opening (68), and a number of refrigerant inlets (69) arranged in a ring are provided on the side wall of the conical cylinder (67) near the opening (68).

6. The dry screw vacuum pump circulating cooling device according to claim 5, characterized in that, A refrigerant outlet pipe (661) is provided below the refrigerant inlet (69), and the refrigerant outlet pipe (661) extends into the conical cylinder (67) with its opening facing downward.

7. The dry screw vacuum pump circulating cooling device according to claim 6, characterized in that, The refrigerant outlet pipe (661) is n-shaped.

8. The dry screw vacuum pump circulating cooling device according to claim 7, characterized in that, The refrigerant outlet pipe (661) is an integrally formed structure, including an inner pipe (6611) and an outer pipe (6612), wherein the diameter of the inner pipe (6611) is smaller than the diameter of the outer pipe (6612).

9. The dry screw vacuum pump circulating cooling device according to claim 6, characterized in that, The housing (61) is provided with an inlet (63), an outlet (64), a liquid refrigerant inlet (65), and a liquid refrigerant outlet (66). The outlet (64) and the liquid refrigerant inlet (65) are located at the upper part of the housing (61), and the inlet (63) and the liquid refrigerant outlet (66) are located at the lower part of the housing (61). The liquid refrigerant inlet (65) is connected to the first heat exchange chamber (6A), and the liquid refrigerant outlet (66) is connected to the second heat exchange chamber (6B). The inlet of the spiral coil (62) is connected to the inlet (63), and the outlet is connected to the outlet (64).

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