External oil cooler for vacuum pump with large pumping number

Abstract

The utility model relates to the technical field of coolers, in particular to an external oil cooler for a large-pumping-number vacuum pump, which comprises a shell, a cooling cylinder is fixedly connected to the inner wall of the shell, one end of the cooling cylinder is communicated with an oil inlet pipe, and the other end of the cooling cylinder is communicated with an oil outlet pipe. The oil inlet pipe and the oil outlet pipe are both fixedly connected to the inner wall of the shell, the surface of the cooling cylinder is sleeved with a heat dissipation pipe, one end of the heat dissipation pipe is fixedly connected with a water inlet, the other end of the heat dissipation pipe is fixedly connected with a water outlet, and the surface of the oil inlet pipe is fixedly connected with a first electromagnetic valve; and the surface of the oil outlet pipe is fixedly connected with a second electromagnetic valve. The vacuum oil cooling device solves the problems that when a vacuum pump is cooled, a mode of directly cooling a pump shell of the vacuum pump is generally adopted, so that the cooling effect on vacuum oil in the vacuum pump is poor, and the performance of the vacuum oil is reduced and even the service life of the vacuum oil is shortened at high temperature.

Description

Technical Field

[0001] This utility model relates to the field of cooler technology, and in particular to an external oil cooler for a high-capacity vacuum pump. Background Technology

[0002] A vacuum pump is a device that uses mechanical, physical, or chemical methods to improve, generate, and maintain a vacuum in a closed space. Because high-capacity vacuum pumps can be affected by the heat they generate during operation, a cooler is usually required to cool them.

[0003] Existing technologies often have the following drawbacks: when cooling a vacuum pump, the pump casing is usually cooled directly, which results in poor cooling of the vacuum oil inside the pump. This leads to a decline in the performance of the vacuum oil at high temperatures and even a shortened service life.

[0004] Therefore, this utility model provides an external oil cooler for a high-capacity vacuum pump. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies where vacuum pumps are typically cooled by directly cooling the pump casing, resulting in poor cooling of the vacuum oil inside the pump and causing performance degradation or even shortened service life of the vacuum oil at high temperatures. Therefore, this invention proposes an external oil cooler for high-capacity vacuum pumps.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an external oil cooler for a high-capacity vacuum pump, comprising a housing, a cooling cylinder fixedly connected to the inner wall of the housing, an oil inlet pipe connected to one end of the cooling cylinder, an oil outlet pipe connected to the other end of the cooling cylinder, both the oil inlet pipe and the oil outlet pipe being fixedly connected to the inner wall of the housing, a heat dissipation pipe sleeved on the surface of the cooling cylinder, a water inlet fixedly connected to one end of the heat dissipation pipe, and a water outlet fixedly connected to the other end of the heat dissipation pipe.

[0007] The aforementioned components achieve the following effects: through the oil inlet pipe, cooling cylinder, and oil outlet pipe, vacuum oil can be extracted and injected into the vacuum pump, while the heat carried by the vacuum oil is absorbed by the coolant circulating in the heat dissipation pipe.

[0008] Preferably, a first solenoid valve is fixedly connected to the surface of the oil inlet pipe, and a second solenoid valve is fixedly connected to the surface of the oil outlet pipe.

[0009] The effect achieved by the above components is that the first and second solenoid valves can be used to close and open the oil inlet and outlet pipes.

[0010] Preferably, a mounting bracket is fixedly connected to the side of the housing near the oil outlet pipe, a pump body is fixedly connected to the inner wall of the mounting bracket, the input end of the pump body is fixedly connected to the oil outlet pipe, and the output end of the pump body is fixedly connected to a first connecting pipe.

[0011] The effect achieved by the above components is that the pump body can be connected to the housing through the mounting bracket, and the vacuum oil can be drawn into the first connecting pipe through the pump body.

[0012] Preferably, a replacement box is fixedly connected to the surface of the first connecting tube, and a second connecting tube is fixedly connected to the side of the replacement box away from the first connecting tube.

[0013] The above components achieve the following effects: the replacement box allows for convenient replacement of vacuum oil, and the second connecting pipe connects the replacement box to the vacuum pump.

[0014] Preferably, the upper surface of the replacement box is connected to an oil injection pipe, and the side of the replacement box away from the oil injection pipe is connected to an oil drain pipe.

[0015] The effect achieved by the above components is that, through the oil injection pipe and oil discharge pipe, when the vacuum oil needs to be replaced, the vacuum oil to be replaced can first be discharged from the oil discharge pipe, and then new vacuum oil can be injected through the oil injection pipe.

[0016] Preferably, a third solenoid valve is fixedly connected to the surface of the oil drain pipe, and a fourth solenoid valve is fixedly connected to the surface of the oil injection pipe.

[0017] The effect achieved by the above components is that the opening and closing of the oil drain pipe and the oil injection pipe can be realized through the third and fourth solenoid valves.

[0018] Preferably, a fixing block is fixedly connected to the side of the replacement box, an electric telescopic rod is fixedly connected to the upper surface of the fixing block, the electric telescopic rod is slidably connected to the inner wall of the replacement box, a sealing plate is fixedly connected to the output end of the electric telescopic rod, a sealing frame is fixedly connected to the inner wall of the replacement box, and the sealing plate is slidably connected to the inner wall of the sealing frame.

[0019] The effect achieved by the above components is that when the vacuum oil needs to be replaced, the sealing plate can be moved closer to the sealing frame by controlling the electric telescopic rod to complete the sealing of the replacement box, thereby facilitating the replacement of the vacuum oil.

[0020] In summary:

[0021] 1. In this utility model, the oil inlet pipe, cooling cylinder, oil outlet pipe and pump body can be set to extract and inject vacuum oil into the vacuum pump. The water outlet, heat dissipation pipe and water inlet can be set to circulate the coolant in the heat dissipation pipe, thereby absorbing the heat of the vacuum oil in the cooling cylinder and cooling it.

[0022] 2. In this utility model, the replacement box, oil drain pipe, oil injection pipe, sealing frame and sealing plate make it convenient to replace the vacuum oil in the vacuum pump when it is necessary, and improve the efficiency of replacing the vacuum oil. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0025] Figure 3 This utility model Figure 2 Enlarged view of point A;

[0026] Figure 4 This is a structural schematic diagram of the replacement box of this utility model.

[0027] Legend: 1. Housing; 2. Cooling cylinder; 3. Oil inlet pipe; 4. Oil outlet pipe; 5. First solenoid valve; 6. Second solenoid valve; 7. Mounting bracket; 8. Pump body; 9. First connecting pipe; 10. Replacement box; 11. Second connecting pipe; 12. Heat dissipation pipe; 13. Water outlet; 14. Water inlet; 15. Electric telescopic rod; 16. Sealing frame; 17. Sealing plate; 18. Oil drain pipe; 19. Oil injection pipe; 20. Third solenoid valve; 21. Fourth solenoid valve; 22. Fixing block. Detailed Implementation

[0028] Reference Figure 1 and Figure 2 As shown, this utility model provides a technical solution: an external oil cooler for a high-capacity vacuum pump, including a housing 1, a cooling cylinder 2 fixedly connected to the inner wall of the housing 1, an oil inlet pipe 3 connected to one end of the cooling cylinder 2, and an oil outlet pipe 4 connected to the other end of the cooling cylinder 2. Both the oil inlet pipe 3 and the oil outlet pipe 4 are fixedly connected to the inner wall of the housing 1. A heat dissipation pipe 12 is fitted onto the surface of the cooling cylinder 2, with a water inlet 14 fixedly connected to one end of the heat dissipation pipe 12 and a water outlet 13 fixedly connected to the other end. Through the oil inlet pipe 3, the cooling cylinder 2, and the oil outlet pipe 4, the vacuum oil inside the vacuum pump can be extracted and injected, while the heat carried by the vacuum oil is absorbed by the coolant circulating in the heat dissipation pipe 12.

[0029] The following is a detailed explanation of its overall setup and function.

[0030] Reference Figures 1-4 As shown, in this embodiment: a first solenoid valve 5 is fixedly connected to the surface of the oil inlet pipe 3, and a second solenoid valve 6 is fixedly connected to the surface of the oil outlet pipe 4. The first solenoid valve 5 and the second solenoid valve 6 can be used to close and open the oil inlet pipe 3 and the oil outlet pipe 4. A mounting bracket 7 is fixedly connected to the side of the housing 1 near the oil outlet pipe 4. A pump body 8 is fixedly connected to the inner wall of the mounting bracket 7. The input end of the pump body 8 is fixedly connected to the oil outlet pipe 4, and the output end of the pump body 8 is fixedly connected to a first connecting pipe 9. The mounting bracket 7 allows the pump body 8 to be connected to the housing 1, and the pump body 8 allows vacuum oil to be drawn into the first connecting pipe 9. A replacement box 10 is fixedly connected to the surface of the first connecting pipe 9, and a second connecting pipe 11 is fixedly connected to the side of the replacement box 10 away from the first connecting pipe 9. The replacement box 10 allows for convenient replacement of the vacuum oil, and the second connecting pipe 11 connects the replacement box 10 to the vacuum pump.

[0031] The upper surface of the replacement box 10 is connected to an oil injection pipe 19, and the side of the replacement box 10 away from the oil injection pipe 19 is connected to an oil drain pipe 18. Through the oil injection pipe 19 and the oil drain pipe 18, when the vacuum oil needs to be replaced, the old vacuum oil to be replaced is first discharged from the oil drain pipe 18, and then new vacuum oil is injected through the oil injection pipe 19. A third solenoid valve 20 is fixedly connected to the surface of the oil drain pipe 18, and a fourth solenoid valve 21 is fixedly connected to the surface of the oil injection pipe 19. The third solenoid valve 20 and the fourth solenoid valve 21 can be used to open and close the oil drain pipe 18 and the oil injection pipe 19. A fixing block 22 is fixedly connected to the side of the replacement box 10, and an electric telescopic rod 15 is fixedly connected to the upper surface of the fixing block 22. The electric telescopic rod 15 is slidably connected to the inner wall of the replacement box 10, and a sealing plate 17 is fixedly connected to the output end of the electric telescopic rod 15. A sealing frame 16 is fixedly connected to the inner wall of the replacement box 10, and the sealing plate 17 is slidably connected to the inner wall of the sealing frame 16. When the vacuum oil needs to be replaced, the sealing plate 17 can be moved closer to the sealing frame 16 by controlling the electric telescopic rod 15 to complete the sealing of the replacement box 10, thereby facilitating the replacement of the vacuum oil.

[0032] Working principle: Before using the vacuum pump, the cooling cylinder 2 inside the housing 1 is first connected to the vacuum pump through the oil inlet pipe 3 and the oil outlet pipe 4. Simultaneously, the pump body 8 on the mounting bracket 7 is started, and the first solenoid valve 5 and the second solenoid valve 6 are opened, allowing the vacuum oil in the vacuum pump to enter the cooling cylinder 2 through the oil inlet pipe 3. The coolant is then introduced into the heat dissipation pipe 12 through the water inlet 14, whereby the heat dissipation pipe 12 absorbs the heat from the vacuum oil in the cooling cylinder 2. The coolant is then discharged from the heat dissipation pipe 12 through the water outlet 13, achieving a coolant circulation process. The cooled vacuum oil passes through the oil outlet pipe 4, the pump body 8, and the second solenoid valve 6. The connecting pipe 9, the replacement box 10, and the second connecting pipe 11 then enter the vacuum pump to complete the cooling process of the vacuum oil. When the vacuum oil needs to be replaced, first activate the electric telescopic rod 15 on the fixing block 22 to bring the sealing plate 17 close to the sealing frame 16, blocking the connection between the replacement box 10 and the second connecting pipe 11. Then, open the third solenoid valve 20, start the pump body 8, and discharge the vacuum oil to be replaced through the drain pipe 18. After that, open the fourth solenoid valve 21, inject new vacuum oil through the oil injection pipe 19, control the sealing plate 17 away from the sealing frame 16, and start the pump body 8 to input the vacuum oil into the vacuum pump. The oil inlet pipe 3, cooling cylinder 2, oil outlet pipe 4, and pump body 8 enable the extraction and injection of vacuum oil into the vacuum pump. The coolant circulates within the cooling cylinder 12 via the water outlet 13, heat dissipation pipe 12, and water inlet 14, thereby absorbing and cooling the heat of the vacuum oil in the cooling cylinder 2. The replacement box 10, oil drain pipe 18, oil injection pipe 19, sealing frame 16, and sealing plate 17 facilitate the replacement of vacuum oil in the vacuum pump when needed, thus improving the efficiency of vacuum oil replacement.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. An external oil cooler for a high-capacity vacuum pump, characterized in that: The device includes a housing (1), and a cooling cylinder (2) is fixedly connected to the inner wall of the housing (1). One end of the cooling cylinder (2) is connected to an oil inlet pipe (3), and the other end of the cooling cylinder (2) is connected to an oil outlet pipe (4). The oil inlet pipe (3) and the oil outlet pipe (4) are both fixedly connected to the inner wall of the housing (1). A heat dissipation pipe (12) is fitted on the surface of the cooling cylinder (2). One end of the heat dissipation pipe (12) is fixedly connected to a water inlet (14), and the other end of the heat dissipation pipe (12) is fixedly connected to a water outlet (13).

2. An external oil cooler for a high-capacity vacuum pump according to claim 1, characterized in that: The surface of the oil inlet pipe (3) is fixedly connected to a first solenoid valve (5), and the surface of the oil outlet pipe (4) is fixedly connected to a second solenoid valve (6).

3. An external oil cooler for a high-capacity vacuum pump according to claim 1, characterized in that: A mounting bracket (7) is fixedly connected to the side of the housing (1) near the oil outlet pipe (4). A pump body (8) is fixedly connected to the inner wall of the mounting bracket (7). The input end of the pump body (8) is fixedly connected to the oil outlet pipe (4), and the output end of the pump body (8) is fixedly connected to the first connecting pipe (9).

4. An external oil cooler for a high-capacity vacuum pump according to claim 3, characterized in that: A replacement box (10) is fixedly connected to the surface of the first connecting tube (9), and a second connecting tube (11) is fixedly connected to the side of the replacement box (10) away from the first connecting tube (9).

5. An external oil cooler for a high-capacity vacuum pump according to claim 4, characterized in that: The upper surface of the replacement box (10) is connected to an oil injection pipe (19), and the side of the replacement box (10) away from the oil injection pipe (19) is connected to an oil drain pipe (18).

6. An external oil cooler for a high-capacity vacuum pump according to claim 5, characterized in that: A third solenoid valve (20) is fixedly connected to the surface of the oil drain pipe (18), and a fourth solenoid valve (21) is fixedly connected to the surface of the oil injection pipe (19).

7. An external oil cooler for a high-capacity vacuum pump according to claim 4, characterized in that: A fixing block (22) is fixedly connected to the side of the replacement box (10), and an electric telescopic rod (15) is fixedly connected to the upper surface of the fixing block (22). The electric telescopic rod (15) is slidably connected to the inner wall of the replacement box (10). A sealing plate (17) is fixedly connected to the output end of the electric telescopic rod (15). A sealing frame (16) is fixedly connected to the inner wall of the replacement box (10), and the sealing plate (17) is slidably connected to the inner wall of the sealing frame (16).

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