Anti-siphon observation equipment capable of automatically adjusting negative pressure

Abstract

The utility model relates to the technical field of anti-siphon observation, and provides anti-siphon observation equipment capable of automatically adjusting negative pressure, which comprises a shell, a vacuum pump, a siphon tank, a first water pipe, a second water pipe, a negative pressure meter, a third water pipe, a pressure sensor, a frequency converter, a lifting device, a water tank and a siphon, the vacuum pump is arranged in the shell, the siphon tank is arranged in the shell, the first water pipe is arranged between the vacuum pump and the siphon tank, the second water pipe is arranged on the siphon tank, and the negative pressure meter is arranged on the side wall of the shell. The frequency converter automatically adjusts and controls the frequency of the vacuum pump so as to control the negative pressure value, the pressure sensor reads the pressure value in real time, when the pressure exceeds the limit, the electromagnetic valve automatically relieves the pressure, the negative pressure value can be automatically and accurately controlled and extracted through the frequency converter, the pressure sensor and the electromagnetic valve, and accurate control over the negative pressure value is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-siphon observation, in particular to an anti-siphon observation device capable of automatically adjusting negative pressure. Background Art

[0002] The simulation and control of negative pressure environments are essential in a variety of fields, including scientific experiments, industrial production, and quality inspection. Traditional negative pressure regulation often relies on a vacuum pump coupled with an SMC digital pressure switch controller. This method has limited control accuracy, typically only reaching around ±10%, making it difficult to meet testing standards requiring high pressure accuracy. This traditional negative pressure regulation method presents significant limitations, particularly in critical experiments such as precision instrument calibration and material performance testing. In light of this, the present application is filed. Utility Model Content

[0003] This application proposes an anti-siphon observation device that automatically adjusts negative pressure to address the technical problem that in the prior art, negative pressure adjustment methods mostly use a vacuum pump in conjunction with an SMC digital pressure switch control meter. This method has limited control accuracy, typically only reaching around ±10%, making it difficult to meet test standards with high pressure accuracy requirements. The above technical objectives of this utility model are achieved through the following technical solutions:

[0004] An anti-siphon observation device with automatic negative pressure adjustment includes a shell, a vacuum pump, a siphon tank, a first water pipe, a second water pipe, a negative pressure gauge, a third water pipe, a pressure sensor, a frequency converter, a lifting device, a water tank and a siphon tube, wherein the vacuum pump is arranged at the bottom of the shell, the siphon tank is arranged inside the shell, the first water pipe is arranged between the vacuum pump and the siphon tank, the second water pipe is arranged on the siphon tank, the negative pressure gauge is arranged on the side wall of the shell, the third water pipe is arranged between the second water pipe and the negative pressure gauge, the pressure sensor is arranged on the third water pipe, the frequency converter is arranged inside the shell, the lifting device is arranged outside the shell, the water tank is arranged on the lifting device, the siphon tube is arranged outside the shell, and a sample is arranged between the second water pipe and the siphon tube.

[0005] Furthermore, a fourth water pipe is provided on the second water pipe, and a pressure relief solenoid valve is provided on the fourth water pipe.

[0006] Furthermore, a touch display screen is provided on the housing near the negative pressure gauge.

[0007] Furthermore, the lifting device includes a hand-cranked lifter.

[0008] Furthermore, a workbench is provided on the shell, and the hand-cranked lifter is arranged on the top of the workbench.

[0009] Furthermore, the siphon is a transparent siphon.

[0010] Furthermore, a scale is provided on the side of the siphon.

[0011] Compared with the prior art, the beneficial effects of the present utility model include:

[0012] Through the coordinated action of a frequency converter, a pressure sensor, etc., the frequency converter automatically adjusts and controls the frequency of the vacuum pump to control the negative pressure value. The pressure sensor reads the pressure value in real time. When the pressure exceeds the limit, the solenoid valve automatically relieves the pressure. Through the frequency converter, the pressure sensor, and the solenoid valve, the extracted negative pressure value can be automatically and accurately controlled within -1 to -90 Kpa ±2 Kpa, achieving precise control of the negative pressure value. The control accuracy can reach ±2 Kpa, greatly meeting the requirements of high-precision test standards and improving the accuracy and reliability of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a schematic structural diagram inside the housing of the present utility model;

[0015] Figure 3 is a schematic structural diagram of another perspective inside the housing of the present utility model;

[0016] Figure 4 is a schematic structural diagram of the frequency converter of the present utility model.

[0017] In the figure: 1. Housing; 2. Vacuum pump; 3. Siphon tank; 4. First water pipe; 5. Second water pipe; 6. Negative pressure gauge; 7. Third water pipe; 8. Pressure sensor; 9. Frequency converter; 10. Water tank; 11. Siphon; 12. Fourth water pipe; 13. Pressure relief solenoid valve; 14. Touch display screen; 15. Hand-operated elevator; 16. Workbench; 17. Sample. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0020] To make the objectives, technical solutions, and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0021] Please refer to the attached Figures 1-4 , an anti-siphon observation device with automatic negative pressure adjustment, comprising a housing 1, a vacuum pump 2, a siphon tank 3, a first water pipe 4, a second water pipe 5, a negative pressure gauge 6, a third water pipe 7, a pressure sensor 8, a frequency converter 9, a lifting device, a water tank 10, and a siphon pipe 11. The vacuum pump 2 is arranged at the bottom inside the housing 1, the siphon tank 3 is arranged inside the housing 1, the first water pipe 4 is arranged between the vacuum pump 2 and the siphon tank 3, the second water pipe 5 is arranged on the siphon tank 3, the negative pressure gauge 6 is arranged on the side wall of the housing 1, the third water pipe 7 is arranged between the second water pipe 5 and the negative pressure gauge 6, the pressure sensor 8 is arranged on the third water pipe 7, the frequency converter 9 is arranged inside the housing 1, the lifting device is arranged outside the housing 1, the water tank 10 is arranged on the lifting device, the siphon pipe 11 is arranged outside the housing 1, a sample 17 is arranged between the second water pipe 5 and the siphon pipe 11, a fourth water pipe 12 is arranged on the second water pipe 5, and a pressure relief solenoid valve 13 is arranged on the fourth water pipe 12.

[0022] With the above technical solution, the user sets the required negative pressure value range (-1 to -90 Kpa) through the touch screen. After the PLC receives the instruction, it starts the entire system, and the vacuum pump 2 begins to work. It extracts the air in the siphon tank 3 through the first water pipe 4 to form an initial negative pressure. The frequency converter 9 automatically adjusts the working frequency of the vacuum pump 2 according to the preset negative pressure value to precisely control the rising speed and the final stable value of the negative pressure. The pressure sensor 8 continuously monitors the pressure value in the third water pipe 7 (connecting the second water pipe 5 and the negative pressure gauge 6) and feeds the data back to the PLC. When the actual pressure approaches or reaches the set value, the frequency converter 9 further finely tunes the frequency of the vacuum pump 2 to ensure that the negative pressure is stable within the accuracy range of ±2 Kpa. The negative pressure in the siphon tank 3 acts on the sample 17 through the second water pipe 5 to simulate a specific test environment. The siphon effect helps to stabilize and maintain the negative pressure state in the sample 17 area while reducing external interference. If the pressure sensor 8 detects that the pressure exceeds the preset range, the PLC immediately activates the pressure relief solenoid valve 13 to release the excess pressure through the fourth water pipe 12 to protect the safety of the system. In this application, through the frequency converter 9, the pressure sensor 8, and the solenoid valve, the extracted negative pressure value of -1 to -90 Kpa ±2 Kpa can be automatically and precisely controlled;

[0023] The fourth water pipe 12 added to the second water pipe 5 and the pressure relief solenoid valve 13 thereon enhance the safety and flexibility of the system. During normal operation, the solenoid valve remains closed and does not affect the normal establishment and maintenance of the negative pressure. Once the pressure sensor 8 detects an abnormal high pressure, the PLC quickly opens the solenoid valve to allow air to enter the siphon system through the fourth water pipe 12 and rapidly reduce the pressure to a safe level.

[0024] In some embodiments, a touch display screen 14 is provided at a position of the housing 1 close to the negative pressure gauge 6. Adding the touch display screen 14 improves the user interaction experience. The user can directly input or select parameters such as the required negative pressure value and test time on the screen, and the screen displays the current negative pressure value, the system status (such as the operating status of the vacuum pump 2 and the opening and closing status of the solenoid valve), and any alarm information in real time.

[0025] In some embodiments, the lifting device includes a manual winch 15. The user can easily adjust the height of the water tank 10 and the sample 17 placed thereon by manually turning the winch handle to meet different test requirements or operational convenience.

[0026] In some embodiments, a workbench 16 is provided on the housing 1, and the manual winch 15 is arranged on the top of the workbench 16. The workbench 16 provided on the housing 1 provides a stable installation foundation for the manual winch 15 and also provides a convenient space for placing test tools, record books, etc.

[0027] In some embodiments, the siphon 11 is a transparent siphon 11. The siphon 11 made of a transparent material allows the user to directly observe the fluid state inside the tube (such as bubble generation, flow velocity, etc.), which helps to judge the operating state of the negative pressure system and the test situation of the sample 17, and improves the intuitiveness and accuracy of the test.

[0028] In some embodiments, a scale is provided on the side of the siphon 11.

[0029] It should be understood that the above specific embodiments of the present invention are only used for illustrative explanation or interpretation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An anti-siphon observation device with automatic negative pressure adjustment, characterized in that, It includes a housing, a vacuum pump, a siphon tank, a first water pipe, a second water pipe, a negative pressure gauge, a third water pipe, a pressure sensor, a frequency converter, a lifting device, a water tank and a siphon pipe. The vacuum pump is arranged at the inner bottom of the housing, the siphon tank is arranged inside the housing, the first water pipe is arranged between the vacuum pump and the siphon tank, the second water pipe is arranged on the siphon tank, the negative pressure gauge is arranged on the side wall of the housing, the third water pipe is arranged between the second water pipe and the negative pressure gauge, the pressure sensor is arranged on the third water pipe, the frequency converter is arranged inside the housing, the lifting device is arranged outside the housing, the water tank is arranged on the lifting device, the siphon pipe is arranged outside the housing, and a sample is arranged between the second water pipe and the siphon pipe.

2. The anti-siphon observation device with automatically adjustable negative pressure according to claim 1, characterized in that, A fourth water pipe is provided on the second water pipe, and a pressure relief solenoid valve is provided on the fourth water pipe.

3. The anti-siphon observation device with automatically adjustable negative pressure according to claim 1, characterized in that, A touch display screen is provided at a position of the housing close to the negative pressure gauge.

4. The anti-siphon observation device with automatically adjustable negative pressure according to claim 1, characterized in that, The lifting device includes a hand-cranked lift.

5. An anti-siphon observation device with automatic negative pressure adjustment according to claim 4, characterized in that, A workbench is provided on the housing, and the hand-cranked lift is arranged on the top of the workbench.

6. An anti-siphon observation device with automatic negative pressure adjustment according to claim 1, characterized in that, The siphon pipe is a transparent siphon pipe.

7. An anti-siphon observation device with automatically adjustable negative pressure according to claim 6, characterized in that, A scale is provided on the side of the siphon pipe.

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