Vacuum pressure maintaining device

Abstract

The utility model discloses a vacuum pressure maintaining device, and relates to the technical field of vacuum. The vacuum pressure maintaining device comprises a vacuum pump, a vacuum tank and a control box, the vacuum pump comprises a pump body, an air suction port and an exhaust port are formed in the pump body, a check valve is arranged on the air suction port, the vacuum tank comprises a tank body, a vacuum pump connector and a vacuum connector are formed in the tank body, a first pipeline is communicated between the vacuum pump connector and the air suction port, and a negative pressure detection device is installed on the first pipeline. And the negative pressure detection device and the vacuum pump are electrically connected with the control box. The vacuum pressure maintaining device can continuously monitor and maintain the vacuum degree.

Description

Technical Field

[0001] This utility model relates to the field of vacuum technology, and in particular to a vacuum pressure holding device. Background Technology

[0002] A vacuum pump is a device used to extract gas to create a vacuum environment. It is widely used in industrial manufacturing, aerospace, semiconductor industry, food processing, and other fields. Its core function is to create the required vacuum environment by removing gas from a confined space and reducing pressure. For example, in industrial manufacturing, when CNC machine tools are used to process various workpieces, a vacuum pump connected to a vacuum chuck is needed to mount and fix the workpieces on the machine tool. By extracting air from the vacuum chuck to create negative pressure, the chuck can adhere and fix thin-walled, easily deformable, or precision workpieces requiring non-destructive clamping, preventing displacement or vibration during processing. Furthermore, during the process of the vacuum chuck adsorbing and fixing the workpiece, it is necessary to continuously monitor and maintain the vacuum level to ensure the suction force of the vacuum chuck remains stable at the required level, preventing insufficient suction force due to vacuum fluctuations and avoiding workpiece displacement or detachment during processing. Therefore, it is necessary to provide a vacuum pressure maintaining device. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a vacuum pressure maintaining device that can continuously monitor and maintain the vacuum level.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A vacuum pressure holding device includes a vacuum pump, a vacuum tank, and a control box. The vacuum pump includes a pump body with an air intake port and an air exhaust port. A check valve is provided on the air intake port. The vacuum tank includes a tank body with a vacuum pump interface and a vacuum connection port. A first pipe connects the vacuum pump interface and the air intake port. A negative pressure detection device is installed on the first pipe. The negative pressure detection device, the vacuum pump, and the control box are electrically connected.

[0006] In some embodiments, the negative pressure detection device is a vacuum pressure gauge or a pressure sensor.

[0007] In some embodiments, the vacuum pressure holding device further includes a water storage tank, with a second pipe connecting the top of the water storage tank to the exhaust port; the vacuum pump is a water circulation vacuum pump, with a water supply interface on the pump body, and a third pipe connecting the water supply interface to the lower part of the water storage tank.

[0008] In some embodiments, the pump body is also provided with an anti-cavitation interface, and a fourth pipe is connected between the anti-cavitation interface and the upper part of the water storage tank.

[0009] In some embodiments, a drain outlet is provided at the bottom of the tank.

[0010] In some embodiments, the control box includes a housing, a controller disposed within the housing, and a control panel disposed on the housing. The control panel includes a display screen, a setting button, a start button, a stop button, a power indicator light, and a running indicator light.

[0011] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0012] The vacuum pump extracts gas from the vacuum tank through the first pipe, reducing the pressure inside the tank and creating a vacuum environment. The negative pressure detection device monitors the negative pressure in the first pipe in real time, allowing operators to understand the vacuum level of the vacuum tank. The vacuum pump's power cord is connected to the control box, which allows for start-up and stop control of the vacuum pump based on the real-time monitoring of the vacuum level. The control box also allows for parameter adjustment of the vacuum pump, thereby changing the pumping speed and vacuum level to achieve the target vacuum level or pressure, and stabilizing the suction force of the connected vacuum suction cup at the required level. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0014] Figure 2 This is a schematic diagram of the connection structure of the vacuum pump according to an embodiment of this application.

[0015] The diagram is labeled as follows: 1. Vacuum pump; 11. Pump body; 111. Inlet; 112. Outlet; 113. Water supply interface; 114. Anti-cavitation interface; 2. Vacuum tank; 21. Tank body; 211. Vacuum pump interface; 212. Vacuum connection port; 213. Drain port; 3. Control box; 31. Box body; 32. Control panel; 4. Check valve; 5. First pipe; 6. Second pipe; 7. Third pipe; 8. Fourth pipe; 9. Water storage tank. Detailed Implementation

[0016] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.

[0017] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not 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 this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0018] like Figures 1-2As shown in the embodiment of this application, a vacuum pressure holding device includes a vacuum pump 1, a vacuum tank 2, and a control box 3. The vacuum pump 1 includes a pump body 11, which has an intake port 111 and an exhaust port 112. A check valve 4 is provided on the intake port 111. The vacuum tank 2 includes a tank body 21, which has a vacuum pump interface 211 and a vacuum connection port 212. A first pipe 5 connects the vacuum pump interface 211 and the intake port 111. The vacuum pump 1 extracts the gas from the tank body 21 of the vacuum tank 2 through the first pipe 5, thereby reducing the gas pressure inside the tank body 21 and creating a vacuum environment. The vacuum connection port 212 is used to connect a vacuum suction cup or other negative pressure working device. When the vacuum pump 1 stops... When the system stops working or malfunctions, the check valve 4 prevents the extracted gas from returning to the vacuum tank 2, thus avoiding disruption of the vacuum environment inside the tank. A negative pressure detection device is installed on the first pipeline 5. The negative pressure detection device, vacuum pump 1, and control box 3 are electrically connected. The negative pressure detection device is used to monitor the negative pressure status in the first pipeline 5 in real time, allowing operators to understand the vacuum level of the vacuum tank 2. The power cord of the vacuum pump 1 is connected to the control box 3. Based on the real-time monitoring of the vacuum level of the vacuum tank 2, the control box 3 can control the start and stop of the vacuum pump 1. It can also adjust the parameters of the vacuum pump 1 to change the pumping speed and vacuum level, so that the suction force of the vacuum suction cup is stabilized at the required level.

[0019] In this embodiment, the control box 3 includes a box body 31, a controller located inside the box body 31, and a control panel 32 located on the box body 31. The control panel 32 includes a display screen, a setting button, a start button, a stop button, a power indicator light, and a running indicator light. The negative pressure detection device can be a vacuum pressure gauge or a pressure sensor. When using a vacuum pressure gauge to detect negative pressure, after connecting the vacuum pressure gauge to the control box 3, a signal acquisition module corresponding to the vacuum pressure gauge is installed in the control box 3 to acquire the electrical signal corresponding to the position of the pressure gauge pointer, and then the pressure value is transmitted to the control system of the control box 3 for processing and display. When using a pressure sensor to detect negative pressure, the sensitive element of the pressure sensor generates a corresponding change in electrical signal under the action of negative pressure. These electrical signals can be directly transmitted to the signal processing unit in the control box 3. After processing, the negative pressure value is displayed on the display screen of the control box 3, and corresponding control operations can be performed according to a preset threshold.

[0020] In this embodiment, the vacuum pressure holding device also includes a water storage tank 9, and a second pipe 6 is connected between the top of the water storage tank 9 and the exhaust port 112; the vacuum pump 1 is a water circulation vacuum pump 1, which forms a negative pressure environment by circulating water in the pump body 11, thereby extracting gas and maintaining a vacuum state. The pump body 11 is provided with a water supply interface 113, and a third pipe 7 is connected between the water supply interface 113 and the lower part of the water storage tank 9. In order to maintain the stable operation of the vacuum pump 1, water is supplied to the vacuum pump 1 through the third pipe 7.

[0021] Furthermore, the pump body 11 is also equipped with an anti-cavitation interface 114, and a fourth pipe 8 connects the anti-cavitation interface 114 to the upper part of the water storage tank 9. When the vacuum pump 1 is working, the impeller rotation inside the pump body 11 causes changes in the liquid pressure. In local areas such as the impeller inlet, the liquid pressure will decrease. When the pressure decreases to the saturated vapor pressure at the current water temperature, the liquid will vaporize and form a large number of bubbles. These bubbles enter the high-pressure area of ​​the impeller with the liquid flow. The rapid collapse of the bubbles will generate extremely high local pressure and temperature, forming tiny shock waves that impact the impeller and other components, causing damage. By establishing a pressure balance channel, namely the fourth pipe 8, between the vacuum pump 1 and the water storage tank 9, the pressure between the pump and the water storage tank 9 can be balanced to a certain extent, reducing the possibility of excessively low pressure inside the pump, thereby reducing the possibility of cavitation and extending the service life of the overall equipment.

[0022] In this embodiment, a drain port 213 is provided at the bottom of the tank 21. During the use of the vacuum tank 2, due to the presence of solid impurities such as rust and welding slag in the pipeline system, or particulate matter such as dust carried in the gas being pumped, these impurities will enter the vacuum tank 2 with the airflow and settle at the bottom. The drain port 213 is used to discharge impurities and sediments to ensure normal operation of the equipment. In addition, during the extraction of process gases containing a large amount of water vapor, such as the vacuum drying process in the food industry, when the gas in the vacuum tank 2 is extracted, the water vapor in the gas may condense into liquid water due to pressure changes and temperature differences. The drain port 213 can be used to discharge the condensed or residual liquid to maintain the vacuum environment.

[0023] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A vacuum pressure holding device, characterized in that: The system includes a vacuum pump, a vacuum tank, and a control box. The vacuum pump includes a pump body with an intake port and an exhaust port. The intake port is equipped with a check valve. The vacuum tank includes a tank body with a vacuum pump interface and a vacuum connection port. A first pipe connects the vacuum pump interface and the intake port. A negative pressure detection device is installed on the first pipe. The negative pressure detection device, the vacuum pump, and the control box are electrically connected.

2. The vacuum pressure holding device according to claim 1, characterized in that: The negative pressure detection device is a vacuum pressure gauge or a pressure sensor.

3. The vacuum pressure holding device according to claim 1, characterized in that: It also includes a water storage tank, with a second pipe connecting the top of the water storage tank to the exhaust port; the vacuum pump is a water circulation vacuum pump, with a water supply interface on the pump body, and a third pipe connecting the water supply interface to the lower part of the water storage tank.

4. The vacuum pressure holding device according to claim 3, characterized in that: The pump body is also equipped with an anti-cavitation interface, and a fourth pipe is connected between the anti-cavitation interface and the upper part of the water storage tank.

5. The vacuum pressure holding device according to claim 1, characterized in that: The tank is equipped with a drain outlet at the bottom.

6. The vacuum pressure holding device according to claim 1, characterized in that: The control box includes a box body, a controller housed inside the box body, and a control panel housed on the box body. The control panel includes a display screen, a setting button, a start button, a stop button, a power indicator light, and a running indicator light.

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