Cooling mechanism for vacuum pump set

Abstract

The utility model discloses a cooling mechanism for a vacuum pump set. The cooling mechanism comprises an inner pipe body; the telescopic connecting bodies are arranged at the two axial ends of the inner pipe body in a communicating mode and can deform; the connecting plate is arranged on the telescopic connecting body in a communicating manner and is used for being connected with a vacuum pump; the outer pipe body is detachably arranged on the outer side of the inner pipe body in a sleeving mode, a flow channel allowing a cooling medium to circulate exists between the outer pipe body and the inner pipe body, the two axial ends of the outer pipe body are provided with a first connector and a second connector in a communicating mode respectively, and the first connector and the second connector are arranged on the two opposite radial sides of the outer pipe body. By means of the detachable structure of the outer pipe body and the inner pipe body, the inside can be conveniently overhauled and cleaned, and the cooling effect is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum pump technology, and specifically relates to a cooling mechanism for a vacuum pump assembly. Background Technology

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate a container and create a vacuum. Currently, there are models where two vacuum pumps are used in series, such as the two-stage Roots vacuum pump disclosed in patent number CN202914315U. This pump includes a main body with an inlet and an outlet, and a silencing device or a silencing and voltage stabilizing device is installed on the outlet. The main body includes a first-stage rotor and a second-stage rotor with Roots impellers, installed in series within the pump casing. A partition is provided between the first-stage and second-stage rotors. The first-stage rotor and the pump casing constitute an independent first-stage Roots vacuum pump unit, and the second-stage rotor and the pump casing constitute an independent second-stage Roots vacuum pump unit. An air passage is arranged on the partition to connect the outlet of the first-stage Roots vacuum pump unit and the inlet of the second-stage Roots vacuum pump unit. The inlet is located on the first-stage Roots vacuum pump unit, and the outlet is located on the second-stage Roots vacuum pump unit.

[0003] In this type of dual vacuum pump structure, the connecting pipe between the two pumps usually operates at high temperatures. The high-temperature gas inside directly enters the lower pump, causing the lower pump to operate at excessively high temperatures, which is detrimental to the operation of the vacuum pump. Utility Model Content

[0004] This invention aims to overcome the shortcomings of existing technologies by providing a cooling mechanism for vacuum pump units that cools down the intermediate connecting parts.

[0005] The present invention solves the technical problem by adopting the following technical solution: a cooling mechanism for a vacuum pump assembly, comprising:

[0006] inner tube body;

[0007] A telescopic connector is provided at both axial ends of the inner tube, and the telescopic connector can deform.

[0008] A connecting plate is provided on the telescopic coupling body, the connecting plate being used to connect to a vacuum pump;

[0009] A detachable outer tube is sleeved on the outside of the inner tube. There is a flow channel between the outer tube and the inner tube for the cooling medium to flow. The axial ends of the outer tube are respectively connected to a first connector and a second connector, which are located on opposite sides of the radial direction of the outer tube.

[0010] In several embodiments, the inner tube body includes a first tube body, a second tube body, and a third tube body that are sequentially connected. The inner diameter of the first tube body is larger than the inner diameter of the third tube body, and the inner diameter of the second tube body gradually decreases from the direction of the first tube body to the direction of the third tube body.

[0011] In several embodiments, the outer tube includes a fourth tube, a fifth tube, and a sixth tube that are connected in sequence. The inner diameter of the fourth tube is larger than the inner diameter of the fifth tube. The inner wall of the fifth tube is substantially parallel to the outer wall of the second tube. The fourth tube extends to the second tube, and the fifth tube extends to the third tube.

[0012] In several embodiments, the first connector is disposed on the fourth pipe body, and the second connector is disposed on the sixth pipe body.

[0013] In several embodiments, there is a gap between the first connector and the end face of the fourth tube body, forming a first connecting part; there is a gap between the second connector and the end face of the sixth tube body, forming a second connecting part; the first connecting part and the second connecting part are connected to the inner tube body by a locking member.

[0014] In several embodiments, a baffle is spirally provided on the second tube body, and the height of the baffle does not exceed the outer side surface of the first tube body.

[0015] In several embodiments, the connecting plate is a flange.

[0016] In several embodiments, the telescopic connector is in the form of a corrugated tube.

[0017] This utility model has the following beneficial effects:

[0018] This invention uses a cooling medium within the flow channel to cool the air in the inner tube, reducing its temperature before it enters the lower pump, ensuring the lower pump's operating condition, and improving the pumping effect.

[0019] This invention features a detachable outer tube and inner tube structure, which facilitates internal inspection and cleaning while ensuring cooling performance.

[0020] This invention improves the flow range of the cooling medium in the flow channel by adjusting the positional distribution of the first and second joints, and reduces the flow velocity through baffles, resulting in more uniform and effective heat exchange. Attached Figure Description

[0021] The accompanying drawings described herein are for illustrative purposes only and do not represent all possible implementations, nor should they be considered as limiting the scope of this invention.

[0022] Figure 1 The overall structure of the cooling mechanism for the vacuum pump assembly in Embodiment 1 is schematically shown;

[0023] Figure 2 schematically shown Figure 1 The cross-sectional structure;

[0024] Figure 3 The cross-sectional structure of the inner tube in Embodiment 2 is shown schematically. Detailed Implementation

[0025] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present utility model, but not all embodiments.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figures 1-2 As shown, the cooling mechanism for the vacuum pump assembly provided in this embodiment mainly consists of an inner tube 10, a telescopic connector 20 connecting the two axial ends of the inner tube 10, a connecting plate 30 connecting the telescopic connector 20, and a detachable outer tube 40 sleeved on the outside of the inner tube 10.

[0029] The telescopic connector 20 is corrugated and can be made of high-temperature resistant rubber. As such, the telescopic connector 20 can deform. The connecting plate 30 is used to connect to the vacuum pump and adopts a flange structure. This reduces the positional accuracy requirements of the two vacuum pumps and facilitates assembly.

[0030] Furthermore, there is a flow channel between the outer tube 40 and the inner tube 10 for the cooling medium to flow through. The cooling medium is water. The outer tube 40 is connected to a first connector 51 and a second connector 52 at its two axial ends. The first connector 51 and the second connector 52 are located on opposite radial sides of the outer tube 40. Water flows in from the first connector 51 and flows out from the second connector 52, completing a complete cooling path.

[0031] Here, the inner tube 10 includes a first tube 11, a second tube 12 and a third tube 13 connected in sequence. The inner diameter of the first tube 11 is larger than the inner diameter of the third tube 13. The inner diameter of the second tube 12 gradually decreases from the direction of the first tube 11 to the direction of the third tube 13, and the inner wall of the second tube 12 has an inwardly convex arc.

[0032] The outer tube 40 includes a fourth tube 41, a fifth tube 42 and a sixth tube 43 connected in sequence. The inner diameter of the fourth tube 41 is larger than the inner diameter of the fifth tube 42. The inner wall of the fifth tube 42 is substantially parallel to the outer wall of the second tube 12. The fourth tube 41 extends to the second tube 12 and the fifth tube 42 extends to the third tube 13.

[0033] Therefore, the first connector 51 is disposed on the fourth tube 41, and the second connector 52 is disposed on the sixth tube 43. There is a gap between the end face of the first connector 51 and the fourth tube 41, forming a first connecting part 411. There is a gap between the end face of the second connector 52 and the sixth tube 43, forming a second connecting part 431. The first connecting part 411 and the second connecting part 431 are connected to the inner tube 10 by a locking member 100. The locking member can be a bolt. A sealing ring can be provided at the connection position between the outer tube 40 and the inner tube 10 to improve the sealing effect.

[0034] Example 2

[0035] In this embodiment, the difference from embodiment 1 is that a baffle 121 is spirally arranged on the second tube 12. The height of the baffle 121 does not exceed the outer side of the first tube 11. The position of the baffle 121 corresponds to the position of the fifth tube 42 and can just contact the inner wall of the fifth tube 42, forming a spiral flow channel at this position.

[0036] The scope of this utility model is not limited by the embodiments described above, but by the appended claims and their equivalents.

[0037] The terminology used herein is intended to explain the embodiments and is not intended to limit and / or restrict the present invention. It should be understood that the terms "front," "rear," "left," "right," "head," "tail," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing the present invention and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

Claims

1. A cooling mechanism for a vacuum pump assembly, characterized in that, include: Inner tube body (10); The telescopic connectors (20) are connected to the two axial ends of the inner tube (10), and the telescopic connectors (20) can deform. A connecting plate (30) is provided on the telescopic connector (20), the connecting plate (30) being used to connect to the vacuum pump; A detachable outer tube (40) is sleeved on the outside of the inner tube (10). There is a flow channel between the outer tube (40) and the inner tube (10) for the flow of cooling medium. The two axial ends of the outer tube (40) are respectively connected to a first connector (51) and a second connector (52). The first connector (51) and the second connector (52) are located on opposite sides of the radial direction of the outer tube (40).

2. The cooling mechanism for a vacuum pump assembly according to claim 1, characterized in that, The inner tube (10) includes a first tube (11), a second tube (12) and a third tube (13) connected in sequence. The inner diameter of the first tube (11) is larger than the inner diameter of the third tube (13), and the inner diameter of the second tube (12) gradually decreases from the direction of the first tube (11) to the direction of the third tube (13).

3. A cooling mechanism for a vacuum pump assembly according to claim 2, characterized in that, The outer tube (40) includes a fourth tube (41), a fifth tube (42) and a sixth tube (43) arranged in sequence. The inner diameter of the fourth tube (41) is larger than the inner diameter of the fifth tube (42). The inner wall of the fifth tube (42) is generally parallel to the outer wall of the second tube (12). The fourth tube (41) extends to the second tube (12) and the fifth tube (42) extends to the third tube (13).

4. A cooling mechanism for a vacuum pump assembly according to claim 3, characterized in that, The first connector (51) is located on the fourth pipe body (41), and the second connector (52) is located on the sixth pipe body (43).

5. A cooling mechanism for a vacuum pump assembly according to claim 4, characterized in that, There is a gap between the first connector (51) and the end face of the fourth tube (41) to form a first connecting part (411), and there is a gap between the second connector (52) and the end face of the sixth tube (43) to form a second connecting part (431). The first connecting part (411) and the second connecting part (431) are connected to the inner tube (10) through a locking member (100).

6. A cooling mechanism for a vacuum pump assembly according to claim 3, characterized in that, A baffle (121) is spirally arranged on the second tube (12), and the height of the baffle (121) does not exceed the outer side of the first tube (11).

7. A cooling mechanism for a vacuum pump assembly according to claim 1, characterized in that, The connecting plate (30) is a flange.

8. A cooling mechanism for a vacuum pump assembly according to claim 1, characterized in that, The telescopic connector (20) is in the shape of a corrugated tube.

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