Air tightness detection device

Abstract

The invention relates to the field of air tightness detection, in particular to an air tightness detection device which comprises a main control unit, a positive pressure electromagnetic valve, a negative pressure electromagnetic valve, a four-way port and a diaphragm pump. The positive pressure electromagnetic valve, the negative pressure electromagnetic valve and the diaphragm pump are electrically connected with the main control unit; a first path of the four-way port is connected with a tested object through a gas path; a second path of the four-way port is connected with the positive pressure electromagnetic valve through a gas path; a third path of the four-way port is connected with the negative pressure electromagnetic valve through an air path; a fourth path of the four-way port is connected with the pressure sensor through a gas path; the negative pressure electromagnetic valve is also connected with the diaphragm pump through a gas circuit; and the positive pressure electromagnetic valve is also connected with the diaphragm pump through a gas circuit. A filter is arranged between the tested object and the four-way port; the method has the beneficial effects that whether a system or an instrument has a pipeline leakage risk or not can be quickly and accurately judged, the workload of manually building a leakage detection device is reduced, and the airtight unstable factors of the system are reduced. Meanwhile, the leakage amount of the system within a certain time is automatically judged, and errors caused by manual judgment are reduced.

Description

Technical Field

[0001] The invention relates to the field of air tightness detection, and in particular to an air tightness detection device. Background Art

[0002] The existing air tightness detection device is composed of an air pump and a pressure gauge or a flow meter, which are connected by a pipeline to form an air tightness detection device, which is widely used in leak detection of instruments and meters and leak detection of instrument related systems. Figure 1 As shown, the device consists of an air pump and a pressure gauge. The air pump is used to pressurize the system, and the value change of the pressure gauge is observed to determine whether there is a leak in the system. This device is assembled manually, which is labor-intensive. In addition, during the construction, the air tightness itself is not stable due to manual errors. Finally, the pressure gauge reading is manually performed, and there will also be errors in the judgment of the reading. Summary of the invention

[0003] The purpose of the present invention is to propose an airtightness detection device to solve the technical problems of traditional airtightness detection devices, such as heavy workload, unstable airtightness and deviation in judgment results, due to complete reliance on a large amount of manual intervention.

[0004] The present invention provides an airtightness detection device, comprising:

[0005] Main control unit, positive pressure solenoid valve, negative pressure solenoid valve, four-way port and diaphragm pump;

[0006] The positive pressure solenoid valve, the negative pressure solenoid valve, the diaphragm pump and the main control unit are electrically connected;

[0007] The first path of the four-way port is connected to the object to be measured through a gas path;

[0008] The second path of the four-way port is connected to the positive pressure solenoid valve through an air path;

[0009] The third path of the four-way port is connected to the negative pressure solenoid valve through a gas path;

[0010] The fourth path of the four-way port is connected to the pressure sensor through a gas path;

[0011] The negative pressure solenoid valve is also connected to the diaphragm pump through an air path;

[0012] The positive pressure solenoid valve is also connected to the diaphragm pump through an air path.

[0013] Furthermore, a filter is installed between the object to be measured and the four-way port.

[0014] Further, a filter is installed between the positive pressure solenoid valve and the negative pressure battery valve, and the filter is also connected to the suction / exhaust port.

[0015] Furthermore, the main control unit is also electrically connected to the LCD display screen.

[0016] Furthermore, the LCD display screen displays the positive and negative pressure function module, the parameter setting module and the result display module.

[0017] Furthermore, the main control unit is also electrically connected to a control switch, and the control switch is used to control the power on and off of the airtightness detection device.

[0018] Furthermore, the main control unit is also electrically connected to the positive and negative pressure control buttons.

[0019] An airtightness detection method, applied to an airtightness detection device, comprises the following steps:

[0020] S1. Power on the airtightness detection device by controlling the switch;

[0021] S2, enable the positive and negative pressure electromagnetic pumps through the positive and negative pressure control buttons;

[0022] S3. Select the positive pressure or negative pressure function through the positive and negative pressure function module on the LCD display screen. Correspondingly, the main control unit controls the positive pressure solenoid valve or the negative pressure solenoid valve to open;

[0023] S4. Set the detection time and detection pressure through the parameter setting module of the LCD display;

[0024] S5. Obtain the test result through the result display module of the LCD display screen.

[0025] The beneficial effects provided by the present invention are: due to the introduction of an automated and electronic main control unit, the labor cost is greatly reduced, and it is possible to quickly and accurately determine whether the system or instrument has a pipeline leakage risk, reduce the workload of manually building a leak detection device, and reduce the airtight instability factor of the system itself. At the same time, the leakage amount of the system within a certain period of time is automatically determined, reducing the error of manual judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the device of the present invention;

[0027] Figure 2 It is a schematic diagram of LCD display screen display;

[0028] Figure 3 It is a schematic diagram of the detection method of the present invention. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0030] Please refer to Figure 1 , Figure 1Schematic diagram of the structure of the device of the present invention; the present invention provides an airtightness detection device, comprising:

[0031] Main control unit, positive pressure solenoid valve, negative pressure solenoid valve, four-way port and diaphragm pump;

[0032] The positive pressure solenoid valve, the negative pressure solenoid valve, the diaphragm pump and the main control unit are electrically connected;

[0033] The first path of the four-way port is connected to the object to be measured through a gas path;

[0034] The second path of the four-way port is connected to the positive pressure solenoid valve through an air path;

[0035] The third path of the four-way port is connected to the negative pressure solenoid valve through a gas path;

[0036] The fourth path of the four-way port is connected to the pressure sensor through a gas path;

[0037] The negative pressure solenoid valve is also connected to the diaphragm pump through an air path;

[0038] The positive pressure solenoid valve is also connected to the diaphragm pump through an air path.

[0039] It should be noted that a filter is installed between the object to be measured and the four-way port.

[0040] It should be noted that a filter is installed between the positive pressure solenoid valve and the negative pressure battery valve, and the filter is also connected to the suction / exhaust port.

[0041] It should be noted that the main control unit is also electrically connected to the LCD display screen.

[0042] Please refer to Figure 2 , Figure 2 It is a schematic diagram of LCD display screen display of the present invention.

[0043] It should be noted that the LCD display screen displays the positive and negative pressure function module, the parameter setting module and the result display module.

[0044] It should be noted that the main control unit is also electrically connected to the control switch, and the control switch is used to control the power on and off of the airtightness detection device. Figure 2 The start in is the control switch.

[0045] It should be noted that the main control unit is also electrically connected to the positive and negative pressure control buttons.

[0046] Please refer to Figure 3 , Figure 3 It is a schematic flow chart of the detection method of the present invention;

[0047] An airtightness detection method, applied to an airtightness detection device, comprises the following steps:

[0048] S1. Power on the airtightness detection device by controlling the switch;

[0049] S2, enable the positive and negative pressure electromagnetic pumps through the positive and negative pressure control buttons;

[0050] S3. Select the positive pressure or negative pressure function through the positive and negative pressure function module on the LCD display screen. Correspondingly, the main control unit controls the positive pressure solenoid valve or the negative pressure solenoid valve to open;

[0051] S4. Set the detection time and detection pressure through the parameter setting module of the LCD display;

[0052] It should be noted that at this time, the main control unit controls the diaphragm pump to start working.

[0053] S5. Obtain the test result through the result display module of the LCD display screen.

[0054] As an example, the detection time is set to 30s and the detection pressure is set to 50kPa. At this time, the detection pressure part displays the real-time pressure change of the pressure sensor. After the diaphragm pump stops waiting for 3S, the detection time starts to count down, and the leakage pressure starts to record the pressure change value from the initial pressure. After the countdown ends, the leakage pressure is the pressure change inside the pipeline after a certain detection time, which represents the leakage risk of the pipeline.

[0055] In order to ensure the detection effect, the diaphragm pump selection should take into account the positive pressure and negative pressure test range, while ensuring air tightness. Generally, a vacuum diaphragm pump is selected.

[0056] In addition, the pressure sensor should be of gauge pressure type, capable of detecting positive and negative pressure changes, with an accuracy of not less than 1% FS and a resolution of not less than 0.01 kpa.

[0057] In summary, the beneficial effects of the present invention are: due to the introduction of an automated and electronic main control unit, the labor cost is greatly reduced, and it is possible to quickly and accurately determine whether the system or instrument has a pipeline leakage risk, reduce the workload of manually building a leak detection device, and reduce the airtight instability of the system itself. At the same time, the leakage amount of the system within a certain period of time is automatically determined, reducing the error of manual judgment.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An airtightness detection device, characterized in that: include: Main control unit, positive pressure solenoid valve, negative pressure solenoid valve, four-way port and diaphragm pump; The positive pressure solenoid valve, the negative pressure solenoid valve, the diaphragm pump and the main control unit are electrically connected; The first path of the four-way port is connected to the object to be measured through a gas path; The second path of the four-way port is connected to the positive pressure solenoid valve through an air path; The third path of the four-way port is connected to the negative pressure solenoid valve through a gas path; The fourth path of the four-way port is connected to the pressure sensor through a gas path; The negative pressure solenoid valve is also connected to the diaphragm pump through an air path; The positive pressure solenoid valve is also connected to the diaphragm pump through an air path.

2. An airtightness detection device as claimed in claim 1, characterized in that: A filter is installed between the object to be measured and the four-way port.

3. An airtightness detection device as claimed in claim 1, characterized in that: A filter is installed between the positive pressure solenoid valve and the negative pressure battery valve, and the filter is also connected to the suction / evacuation port.

4. The airtightness detection device according to claim 1, characterized in that: The main control unit is also electrically connected to the LCD display screen.

5. An airtightness detection device as claimed in claim 4, characterized in that: The LCD display screen displays the positive and negative pressure function module, the parameter setting module and the result display module.

6. The airtightness detection device according to claim 1, characterized in that: The main control unit is also electrically connected to a control switch, and the control switch is used to control the power on and off of the airtightness detection device.

7. The airtightness detection device according to claim 1, characterized in that: The main control unit is also electrically connected to the positive and negative pressure control buttons.

8. An airtightness detection method, applied to an airtightness detection device as claimed in any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1. Power on the airtightness detection device by controlling the switch; S2, enable the positive and negative pressure electromagnetic pumps through the positive and negative pressure control buttons; S3, select the positive pressure or negative pressure function through the positive and negative pressure function module of the LCD display screen, and correspondingly, the main control unit controls the positive pressure solenoid valve or the negative pressure solenoid valve to open; S4. Set the detection time and detection pressure through the parameter setting module of the LCD display; S5. Obtain the test result through the result display module of the LCD display screen.

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