Vacuum pump unit capable of being used for conveying organic solvent

Abstract

The utility model provides a vacuum pump unit capable of being used for conveying an organic solvent, which comprises a solvent removal kettle, a condenser, a pressure container, a controller, a roots screw vacuum pump, a high-pressure vacuum pump and a plurality of water circulation vacuum pumps, controlling the Roots screw vacuum pump and the high-pressure vacuum pump to stop running, driving the plurality of water circulation vacuum pumps to stop running in sequence within a preset starting time period, driving the Roots screw vacuum pump to run after all the water circulation vacuum pumps stop running, and driving the high-pressure vacuum pump to run after the Roots screw vacuum pump runs for a first time period, therefore, in the initial stage of organic solvent removal, the multiple water circulation vacuum pumps operate at the same time to ensure high-flow quick discharge, the multiple water circulation vacuum pumps are stopped in sequence within the preset starting time period to cooperate with reduction of output flow in the process of organic solvent gradual removal, then the flow is reduced after the organic solvent is reduced, and the removal efficiency of the organic solvent is improved. Therefore, the Roots screw vacuum pump and the high-pressure vacuum pump are driven to start and operate, and the high negative pressure performance of the vacuum pump unit is ensured, so that the organic solvent is completely removed, and the purposes of high efficiency and energy conservation are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical refrigerators, in particular to a vacuum pump unit which can be used for conveying organic solvents. Background Art

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to obtain a vacuum. It can be used in many fields, such as in the semiconductor, chemical, pharmaceutical, food and other industries to extract gas and create a vacuum environment.

[0003] A vacuum pump unit is a device composed of multiple components used to create a vacuum environment. Its main components include: (1) Vacuum pump: It is the core component for generating vacuum. According to different principles and working methods, it can be divided into rotary vane pump, centrifugal pump, liquid ring pump, adsorption pump, grid ion pump, etc. (2) Vacuum gauge: It is used to measure and monitor the vacuum degree inside the vacuum pump unit. Common ones include hot cathode ionization vacuum gauge, thermal conductivity vacuum gauge, cold cathode ionization vacuum gauge, etc. (3) Gas cooler / cooling water system: For some vacuum pumps that need to be cooled, a gas cooler or cooling water system will be equipped to keep the temperature of the pump stable. (4) Valves and pipes: It is used to control the flow of gas and adjust the pressure inside the vacuum system, including isolation valves, regulating valves, stop valves, etc. (5) Vacuum pump control system: It includes electronic control system, automatic control device, alarm system, etc., which is used to monitor and control the operating status of the vacuum pump unit.

[0004] The existing vacuum pump is a more traditional water circulation vacuum pump, which has the advantages of low price, low energy consumption and large flow rate. The disadvantage is low ultimate vacuum degree. The more advanced vacuum pump on the market is the Roots screw vacuum pump, which has the advantages of high ultimate vacuum degree, but high price, high energy consumption and low flow rate.

[0005] For the existing production process, when there is a lot of organic solvent in the material, high vacuum is not required, but high flow is required. When the organic solvent content in the material is low, the flow will become very small by itself. At this time, high vacuum is required to remove the small amount of residual organic solvent. Utility Model Content

[0006] In view of this, the technical problem to be solved by the utility model is: how to provide a vacuum pump unit that can be used for conveying organic solvents to improve the material conveying efficiency of the vacuum pump unit when the organic solvent content is high.

[0007] To achieve the above object, the utility model provides a vacuum pump unit that can be used for organic solvent transportation, which includes a solvent removal kettle, a condenser, a pressure-resistant container, a controller, a Roots screw vacuum pump, a high-pressure vacuum pump, a water circulation vacuum pump, and a screw mixing unit;

[0008] The output end of the solvent removal kettle is connected to the condenser through a pipeline, and the pressure-resistant container includes a first port and a second port;

[0009] The output end of the condenser is connected to the first port through a pipeline;

[0010] The input end of the condenser is connected to the screw mixing unit, and the screw mixing unit includes a driving motor, a shell and a screw, and the shell is respectively connected to the output end of the solvent removal kettle and the condenser, and the driving motor is fixedly arranged on the shell;

[0011] The Roots screw vacuum pump is connected to the first port through a pipeline, and the second port is connected to the high-pressure vacuum pump and the water circulation vacuum pump respectively;

[0012] The controller is connected to the drive motor, the Roots screw vacuum pump, the high-pressure vacuum pump and the water circulation vacuum pump. The controller is configured to drive multiple water circulation vacuum pumps to start running at the same time, and control the Roots screw vacuum pump and the high-pressure vacuum pump to stop running, drive the water circulation vacuum pump to stop running after driving it for a preset time, and drive the drive motor, the Roots screw vacuum pump and the high-pressure vacuum pump to run.

[0013] Furthermore, the output shaft of the driving motor is connected to the screw rod, and the driving motor drives the screw rod to rotate inside the housing.

[0014] Furthermore, the controller is configured to drive the drive motor, the Roots screw vacuum pump and the high-pressure vacuum pump to start running simultaneously.

[0015] Furthermore, a plurality of the water circulation vacuum pumps are arranged side by side and are respectively connected to the second port.

[0016] Compared with the related art, the utility model proposes a vacuum pump unit that can be used for conveying organic solvents, and its beneficial effect is that: a plurality of water circulation vacuum pumps are driven by a controller to start and run at the same time, and the Roots screw vacuum pump and the high-pressure vacuum pump are controlled to stop running, and the water circulation vacuum pump stops running after a preset time, and then the Roots screw vacuum pump, the drive motor and the high-pressure vacuum pump are driven to run, thereby, in the initial stage of organic solvent removal, a plurality of water circulation vacuum pumps can be operated simultaneously to ensure high flow rate delivery, and as the solvent is continuously conveyed, the organic solvent gradually decreases, thereby driving the Roots screw vacuum pump and the drive motor to rotate, and the drive motor drives the screw to achieve mixing and stirring of the materials conveyed to the condenser, so as to improve the mixing of the organic solvent and thereby ensure sufficient heat exchange in the condenser and more efficient conveying when passing through the Roots screw vacuum pump and the high-pressure vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a vacuum pump unit that can be used for transporting organic solvents in an embodiment of the utility model;

[0018] Figure 2 Schematic diagram of the system of the controller in the embodiment of the present utility model. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] See also Figure 1 As shown in FIG. 2 , the utility model proposes a vacuum pump unit that can be used for conveying organic solvents, which includes a solvent removal kettle 11 , a condenser 12 , a pressure-resistant container 13 , a controller 14 , a Roots screw vacuum pump 21 , a high-pressure vacuum pump 22 , a water circulation vacuum pump 23 , and a screw 33 mixing unit 30 .

[0021] The output end of the solvent removal kettle 11 is connected to the condenser 12 through a pipeline, and the pressure-resistant container 13 includes a first port 131 and a second port 132 .

[0022] The output end of the condenser 12 is connected to the first port 131 through a pipeline.

[0023] The input end of the condenser 12 is connected to the screw 33 mixing unit 30, and the screw 33 mixing unit 30 includes a driving motor 31, a shell 32 and a screw 33. The shell 32 is respectively connected to the output end of the solvent removal kettle 11 and the condenser 12. The driving motor 31 is fixedly arranged on the shell 32, and the output shaft of the driving motor 31 is connected to the screw 33. The driving motor 31 drives the screw 33 to rotate inside the shell 32.

[0024] The Roots screw vacuum pump 21 is connected to the first port 131 through a pipeline, and the second port 132 is respectively connected to the high-pressure vacuum pump 22 and the water circulation vacuum pump 23. A plurality of water circulation vacuum pumps 23 are arranged side by side and are respectively connected to the second port 132.

[0025] The controller 14 is connected to the drive motor 31, the Roots screw vacuum pump 21, the high-pressure vacuum pump 22 and the water circulation vacuum pump 23. The controller 14 is configured to drive multiple water circulation vacuum pumps 23 to start running at the same time, and control the Roots screw vacuum pump 21 and the high-pressure vacuum pump 22 to stop running, drive the water circulation vacuum pump 23 to stop running after running for a preset time, and drive the drive motor 31, the Roots screw vacuum pump 21 and the high-pressure vacuum pump 22 to run.

[0026] The controller 14 is configured to drive the drive motor 31 , the Roots screw vacuum pump 21 and the high-pressure vacuum pump 22 to start running simultaneously.

[0027] A plurality of water circulation vacuum pumps 23 are driven by a controller to start running at the same time, and the Roots screw vacuum pump 21 and the high-pressure vacuum pump 22 are controlled to stop running. After the water circulation vacuum pump 23 runs for a preset time, it stops running, and then the Roots screw vacuum pump 21, the drive motor 31 and the high-pressure vacuum pump 23 are driven to run. Thus, in the initial stage of organic solvent removal, a plurality of water circulation vacuum pumps can be operated simultaneously to ensure high flow rate delivery. With the continuous delivery of the solvent, the organic solvent gradually decreases, and then the Roots screw vacuum pump 21 and the drive motor 31 are driven to rotate. The drive motor 31 drives the screw to achieve mixing and stirring of the materials delivered to the condenser, so as to improve the mixing of the organic solvent and thereby ensure sufficient heat exchange in the condenser and more efficient delivery when passing through the Roots screw vacuum pump and the high-pressure vacuum pump.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A vacuum pump unit for conveying organic solvents, characterized in that: It includes a solvent removal kettle, a condenser, a pressure-resistant container, a controller, a Roots screw vacuum pump, a high-pressure vacuum pump, a water circulation vacuum pump, and a screw mixing unit; The output end of the solvent removal kettle is connected to the condenser through a pipeline, and the pressure-resistant container includes a first port and a second port; The output end of the condenser is connected to the first port through a pipeline; The input end of the condenser is connected to the screw mixing unit, and the screw mixing unit includes a driving motor, a shell and a screw, and the shell is respectively connected to the output end of the solvent removal kettle and the condenser, and the driving motor is fixedly arranged on the shell; The Roots screw vacuum pump is connected to the first port through a pipeline, and the second port is connected to the high-pressure vacuum pump and the water circulation vacuum pump respectively; The controller is connected to the drive motor, the Roots screw vacuum pump, the high-pressure vacuum pump and the water circulation vacuum pump. The controller is configured to drive multiple water circulation vacuum pumps to start running at the same time, and control the Roots screw vacuum pump and the high-pressure vacuum pump to stop running, drive the water circulation vacuum pump to stop running after driving it for a preset time, and drive the drive motor, the Roots screw vacuum pump and the high-pressure vacuum pump to run.

2. The vacuum pump unit for conveying organic solvents according to claim 1, characterized in that: The output shaft of the driving motor is connected to the screw rod, and the driving motor drives the screw rod to rotate inside the housing.

3. The vacuum pump unit for conveying organic solvents according to claim 1, characterized in that: The controller is configured to drive the drive motor, the Roots screw vacuum pump and the high-pressure vacuum pump to start running simultaneously.

4. The vacuum pump unit for conveying organic solvents according to claim 1, characterized in that: A plurality of the water circulation vacuum pumps are arranged side by side and are respectively connected to the second port.

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