CN216241194U - Adjustable automatic pressure balancing device - Google Patents
Adjustable automatic pressure balancing device Download PDFInfo
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- CN216241194U CN216241194U CN202122839300.7U CN202122839300U CN216241194U CN 216241194 U CN216241194 U CN 216241194U CN 202122839300 U CN202122839300 U CN 202122839300U CN 216241194 U CN216241194 U CN 216241194U
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- pressure
- vacuum pump
- communicating pipe
- adjustable automatic
- negative pressure
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Abstract
The utility model belongs to the technical field of application of vacuum pump technology and the like, and particularly relates to an adjustable automatic pressure balancing device. The automatic operation under any pressure condition in a vacuum system is realized by utilizing the pressure spring and the porous thread plate. Including setting up the communicating pipe between vacuum pump malleation end and negative pressure end, communicating pipe is provided with the piston chamber, is provided with sealed piston core in the piston chamber, and sealed piston core links to each other with a pressure spring's one end towards the one end tip in negative pressure zone, and this pressure spring's the other end links to each other with a porous thread board.
Description
Technical Field
The utility model belongs to the technical field of application of vacuum pump technology and the like, and particularly relates to an adjustable automatic pressure balancing device.
Background
At present, the method for preventing the ultrahigh vacuum from operating with ultrahigh power by a vacuum pump in the industry comprises the following steps: a bypass gas distribution valve is added at the negative pressure end, and a regulating valve is added between the positive pressure and the negative pressure. The operation method is generally that a manual sensor and a pressure sensor are matched with an electric valve.
The above methods suffer from various disadvantages.
Firstly, a bypass gas distribution valve is added at the negative pressure end.
1. Manually adjusting the valve, the pressure is not accurate.
2. The noise at the valve is large, the local resistance is large, and the power of the motor is consumed.
3. The air is added to influence the concentration of the extracted medium.
4. The pressure sensor and the electric valve are adopted for adjustment, the circuit is complicated, and the manufacturing cost is high. When the pressure fluctuation is frequent, the response is not timely.
And secondly, adding a regulating valve between the positive pressure and the negative pressure.
1. The pressure is inaccurate when the valve is manually adjusted.
2. The noise at the valve is large, the local resistance is large, and the power of the motor is consumed.
3. The pressure sensor and the electric valve are adopted for adjustment, the circuit is complicated, and the manufacturing cost is high. When the pressure fluctuation is frequent, the response is not timely.
The pressure balancing device is a main part for stable operation of the vacuum pump, and the vacuum pump cannot operate stably because the pressure balancing device cannot be normally opened and closed. Therefore, a set of pressure balancing device which is simple to operate, low in cost, low in energy consumption, stable and reliable is developed, and the pressure balancing device has very important significance for safe and stable operation of the vacuum pump.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides an adjustable automatic pressure balancing device.
In order to achieve the purpose, the utility model adopts the following technical scheme that the vacuum pump comprises a communicating pipe arranged between a positive pressure end and a negative pressure end of a vacuum pump, the communicating pipe is provided with a piston cavity, a sealing piston core is arranged in the piston cavity, one end part of the sealing piston core facing to a negative pressure area is connected with one end of a pressure spring, and the other end of the pressure spring is connected with a porous thread plate.
Furthermore, the two ends of the communicating pipe are provided with clamping flanges for connection, and the clamping flanges at the two ends of the communicating pipe are connected with the corresponding vacuum pump pressure ends.
Further, when installed, the sealing piston core faces a positive pressure area of the vacuum pump, and the porous thread plate faces a negative pressure area of the vacuum pump.
Further, the porous thread plate is provided with a vent hole.
Further, the vent hole is provided with an air inlet lip and an exhaust flaring.
Compared with the prior art, the utility model has the beneficial effects.
The utility model relates to a method for preventing ultrahigh vacuum super power operation in a vacuum pump load operation state, which arranges a piston cavity and a sealed piston core between a positive pressure area and a negative pressure area to realize pressure balance and adopts a pressure spring and a porous thread plate. The automatic operation under any pressure condition in a vacuum system is realized by utilizing the pressure spring and the porous thread plate.
Drawings
The utility model is further described with reference to the following figures and detailed description. The scope of the utility model is not limited to the following expressions.
Fig. 1 is a schematic structural diagram of an adjustable automatic pressure balancing apparatus according to an embodiment.
In the figure, 1, a piston cavity, 2, a sealing piston core, 3, a pressure spring, 4 and a porous thread plate.
Detailed Description
As shown in fig. 1, embodiment 1: the adjustable automatic pressure balancing device comprises a communicating pipe arranged between a positive pressure end and a negative pressure end of the vacuum pump, the communicating pipe is provided with a piston cavity 1, a sealing piston core 2 is arranged in the piston cavity 1, one end part, facing a negative pressure area, of the sealing piston core 2 is connected with one end of a pressure spring 3, and the other end of the pressure spring 3 is connected with a porous thread plate 4. The pressure spring 3 and the porous thread plate 4 are both positioned in the inner cavity of the communicating pipe.
Preferably, the two ends of the communicating pipe are provided with clamping flanges for connection, and the clamping flanges at the two ends of the communicating pipe are connected with the corresponding vacuum pump pressure ends. According to the practical problem of the existing vacuum pump, a bypass pipeline is additionally arranged by utilizing the pressure difference between the positive pressure end and the negative pressure end of the vacuum pump, and a flange is adopted for clamping. When installed, the sealing piston core 2 faces a positive pressure area of the vacuum pump, and the porous thread plate 4 faces a negative pressure area of the vacuum pump. The installation is carried out according to the direction from positive pressure to negative pressure, and the porous thread plate 4 is adjusted to compress the pressure spring 3 to a proper position according to the design pressure of the system before the installation of the device. After installation, the balancing device is not started when the system pressure is within the designed pressure range. When the system load changes and the system pressure is greater than the design pressure, the balancing device is automatically opened, so that the positive pressure and the negative pressure of the vacuum pump are communicated, and the load is offset to generate a change value.
Preferably, the porous thread plate 4 is provided with a vent hole, and the vent hole is provided with an air inlet lip and an exhaust flaring. Which reduces the resistance and noise generation of the balancing device of the present invention, so that the system operates stably at the design pressure. When the system load returns to the original state, the balancing device is automatically closed. The pressure value suitable for the vacuum system is adjusted in advance according to different system pressures.
The utility model relates to a process method.
1. A positive pressure end and a negative pressure end are additionally arranged according to the size of the vacuum pump to form a communicating pipe, and a clamping flange is additionally arranged.
2. According to different design pressures of the negative pressure system, the pressure value of the stable operation of the system is adjusted to compress the pressure spring 3 by the porous thread plate 4, so that the pressure spring is in a proper position.
3. And designing the number, size and form of the multi-hole thread plate 4 according to the pressure change value, and obtaining the numerical values with the minimum noise and the minimum resistance through calculation and software simulation of the air inlet lip curved surface coordinate value and the exhaust flaring angle of the single hole for processing.
4. And (4) testing according to different pressure values, and shaping and producing after the test is qualified.
The utility model adopts the communication pipe additionally arranged between the positive pressure chamber and the negative pressure chamber, thereby avoiding the influence of air distribution on the concentration of the extracted medium when the load is unstable.
The utility model adopts the sealing of the piston cavity 1 and the piston, thereby avoiding air leakage when the negative pressure system operates normally.
The utility model adopts the pressure spring 3 and the porous thread plate 4, so that the balancing device can be adjusted randomly according to the system pressure and can automatically run.
The vent holes of the porous thread plate 4 adopt the forms of air inlet lips and exhaust flaring, so that the generation of local resistance and noise is reduced, and the energy consumption of the whole device is reduced.
After the utility model is installed, the balancing device is not started when the system pressure is within the designed pressure range. When the system load changes and the system pressure is greater than the design pressure, the balancing device is automatically opened, so that the positive pressure and the negative pressure of the vacuum pump are communicated, and the load change value is offset. When the system load returns to the original state, the balancing device is automatically closed.
The working principle is as follows: a piston cavity 1 and a sealing piston core 2 are arranged between a positive pressure area and a negative pressure area, a pressure spring 3 is arranged at the negative pressure end of the piston core, and automatic sealing is realized by the fact that the pressure value F1 of the pressure spring 3 is larger than the pressure difference between the two ends of the piston cavity 1 and the area generation force value F2 of the piston valve core. When F1 is less than F2 value, the piston core opens to realize pressure balance. The magnitude of the F1 value of the pressure spring 3 is adjusted in magnitude by compression and expansion by the porous thread plate 4. The intake lip and the exhaust flare of the vent hole of the porous thread plate 4 reduce the resistance of the device and the generation of noise.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the utility model.
Claims (5)
1. Adjustable automatic pressure equaliser, its characterized in that: including setting up the communicating pipe between vacuum pump malleation end and negative pressure end, communicating pipe is provided with the piston chamber, is provided with sealed piston core in the piston chamber, and sealed piston core links to each other with a pressure spring's one end towards the one end tip in negative pressure zone, and this pressure spring's the other end links to each other with a porous thread board.
2. The adjustable automatic pressure equalization apparatus of claim 1, wherein: and the two ends of the communicating pipe are provided with clamping flanges for connection, and the clamping flanges at the two ends of the communicating pipe are connected with the corresponding vacuum pump pressure ends.
3. The adjustable automatic pressure equalization apparatus of claim 1, wherein: when the sealing piston core is installed, the sealing piston core faces to a positive pressure area of the vacuum pump, and the porous thread plate faces to a negative pressure area of the vacuum pump.
4. The adjustable automatic pressure equalization apparatus of claim 1, wherein: and the porous thread plate is provided with a vent hole.
5. The adjustable automatic pressure equalization apparatus of claim 4, wherein: the vent hole is provided with an air inlet lip and an exhaust flaring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122839300.7U CN216241194U (en) | 2021-11-19 | 2021-11-19 | Adjustable automatic pressure balancing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122839300.7U CN216241194U (en) | 2021-11-19 | 2021-11-19 | Adjustable automatic pressure balancing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216241194U true CN216241194U (en) | 2022-04-08 |
Family
ID=80946473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122839300.7U Active CN216241194U (en) | 2021-11-19 | 2021-11-19 | Adjustable automatic pressure balancing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216241194U (en) |
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2021
- 2021-11-19 CN CN202122839300.7U patent/CN216241194U/en active Active
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