Automatic calibration device for ultrasonic cleaning standard leak hole

Abstract

The utility model discloses an automatic calibration device for an ultrasonic cleaning standard leak hole, which comprises a gas source component, a gas inlet component and a gas outlet component, the air source control assembly is used for controlling an air source and comprises a first end and a second end which are oppositely arranged, the first end is connected with the air source assembly, and the second end is connected with one end of the leak detection hole; the pressure gauge is connected between the air source control assembly and the leak detection hole; the standard flow meter is connected with the other end of the target object and is used for detecting the leakage of the detected hole; the ultrasonic cleaning assembly is provided with a cleaning cavity and is suitable for cleaning the leak-detected hole placed in the cleaning cavity; and the drying assembly is provided with a drying cavity and is suitable for drying the leak-detected hole. By arranging the ultrasonic cleaning assembly, the leak detection hole can be subjected to ultrasonic cleaning so as to prevent the gas path of the leak detection hole from being blocked to influence the measurement precision; through the arrangement of the drying assembly, the leak-detected hole subjected to ultrasonic cleaning can be dried, so that cleaning liquid is prevented from remaining in a gas path of the leak-detected hole, and the measurement precision is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of standard leak detection, in particular to an automatic calibration device for standard leaks cleaned by ultrasonic cleaning. Background Art

[0002] A standard leak is a measuring standard device that provides a known gas flow rate to the atmosphere (or inside a vacuum system) under specified conditions. It is mainly used to calibrate airtight leak detectors and verify whether the instrument is working properly. Airtight leak detectors are widely used in leak detection of workpieces or systems with sealing requirements in industries such as automobiles, gas appliances, natural gas transportation pipelines, medical devices, and sanitary packaging. In particular, the automotive and gas industries have quantitative requirements for the allowable leakage of each component. With the acceleration of industrial modernization, different types of airtight leak detectors have been widely used, and the corresponding channel-type standard leaks are also increasing. In order to ensure that the leak detection data is accurate and reliable, the leak detector must be calibrated using a standard leak. Therefore, accurate traceability of the standard leak plays a very important role.

[0003] However, when the existing technology is used to test the standard leak, since the air path of the standard leak is very thin, the air path is easily blocked by dust or impurities. The air path is often blocked during calibration, resulting in abnormal measurement values. In addition, manual adjustment to the required pressure is required during calibration. In low or high pressure conditions, repeated adjustments are sometimes required to reach the specified pressure value, which is time-consuming and labor-intensive. Utility Model Content

[0004] In view of this, the present application is provided to solve at least one problem existing in the background technology and the purpose of the present application is achieved through the following technical solutions: an automatic calibration device for ultrasonic cleaning standard leak, comprising:

[0005] An air source assembly, adapted to provide an air source;

[0006] An air source control component, used for controlling the air source, comprising a first end and a second end arranged opposite to each other, wherein the first end is connected to the air source component, and the second end is connected to one end of the leak hole to be detected;

[0007] A pressure gauge connected between the gas source control assembly and the leak hole to be detected;

[0008] A standard flow meter connected to the other end of the target object and used for leak detection of the leak hole to be detected;

[0009] An ultrasonic cleaning component, having a cleaning cavity, suitable for cleaning a leak hole to be detected placed in the cleaning cavity;

[0010] The drying component has a drying chamber and is suitable for drying the leak hole to be detected.

[0011] Optionally, in the above-mentioned ultrasonic cleaning standard leak automatic calibration device, the drying chamber includes a purge chamber, a fan is arranged in the purge chamber, and the fan outlet is arranged toward the leak hole to be detected.

[0012] Optionally, in the above-mentioned ultrasonic cleaning standard leak automatic calibration device, the drying chamber includes a drying chamber, and a heating element is arranged in the drying chamber, and the heating element is suitable for heating the airflow in the drying chamber to dry the leak hole to be detected.

[0013] Optionally, the above-mentioned ultrasonic cleaning standard leak automatic calibration device comprises a whole machine frame and a door body, the door body encloses the frame so that the whole machine frame has an installation space, the air source assembly, air source control assembly, pressure gauge, standard flow meter, and the ultrasonic cleaning assembly and drying assembly are all arranged in the whole machine frame, and the door body is an explosion-proof door.

[0014] Optionally, in the above-mentioned ultrasonic cleaning standard leak automatic calibration device, the gas source control component includes a pressure-stabilizing tank connected to the gas source and a pressure controller connecting the pressure-stabilizing tank and the leak to be detected.

[0015] Optionally, the above-mentioned ultrasonic cleaning standard leak automatic calibration device further includes a control component, and the air source control component is electrically connected to the control component.

[0016] The utility model adopts the above structure to achieve the following beneficial effects: by providing an air source control component connecting the leak hole to be detected and the air source component and a control component electrically connected thereto, the air source pressure can be automatically adjusted to the required pressure and the air source can be stabilized by setting a pressure constant in the control component through the air source control component, thereby improving the detection efficiency and measurement accuracy; by providing an ultrasonic cleaning component, the leak hole to be detected can be ultrasonically cleaned to prevent the air path of the leak hole to be detected from being blocked and affecting the measurement accuracy; by providing a drying component, the leak hole to be detected can be dried after ultrasonic cleaning to prevent residual cleaning liquid in the air path of the leak hole to be detected, thereby further improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the automatic calibration device for ultrasonic cleaning standard leak shown in an embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of the structure of the automatic calibration device for ultrasonic cleaning standard leak shown in the embodiment of the present application;

[0019] Figure 3 for Figure 2 The schematic diagram of the structure of the ultrasonic cleaning standard leak automatic calibration device in another direction is shown. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limitations on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. The present utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] like Figures 1 to 3 As shown, an ultrasonic cleaning standard leak automatic calibration device shown in a preferred embodiment of the utility model is suitable for cleaning and automatically calibrating standard leaks. The ultrasonic cleaning standard leak automatic calibration device includes a whole machine frame 9 and a door body 8, and the door body 8 closes the frame 9 so that the whole machine frame 9 has an installation space. The ultrasonic cleaning standard leak automatic calibration device also includes an air source component 1 installed in the installation space, an air source control component 2, a pressure gauge 5 connected between the air source control component 2 and the leak hole 3 to be detected, and a standard flow meter 4. Among them, the air source component 1 is suitable for providing an air source, and the air source component 1 can replace the provided air source according to different leak holes 3 to be detected, such as nitrogen, air, hydrogen, helium, argon, etc.; the air source control component 2 is used to control the air source, such as controlling the air source pressure value and the air source stability; the pressure gauge 5 can always display the current device pressure to ensure that the relative error of the air source pressure value of the leak hole 3 to be detected is within the allowable range; the standard flow meter 4 is connected to the leak hole 3 to be detected for leak detection of the leak hole 3 to be detected. It should be noted that, in this embodiment, the door body 8 is an explosion-proof door to prevent the detection personnel from being harmed even if a leak occurs when measuring the leak hole 3 under special circumstances, such as high pressure. In addition, in this embodiment, the pressure measurement range of the device is 1kpa-0.6Mpa, and the flow measurement range is 0.5mL / min-10L / min.

[0023] Specifically, the gas source control component 2 includes a first end and a second end that are relatively arranged, the first end is connected to the gas source component 1, and the second end is connected to one end of the leak hole 3 to be detected. More specifically, the automatic calibration device for standard leak holes in ultrasonic cleaning also includes a control component 10, and the gas source control component 2 is electrically connected to the control component 10. In this embodiment, the gas source control component 2 includes a pressure-stabilizing tank 21 connected to the gas source and a pressure controller 22 connecting the pressure-stabilizing tank 21 and the leak hole 3 to be detected. Among them, the pressure-stabilizing tank 21 is used to stabilize the gas source provided by the gas source component 1. The pressure controller 22 is connected to the above-mentioned control component 10, so that after the control component 10 inputs a pressure set value, it is automatically adjusted to the required pressure through the pressure controller 22, so that there is no need to manually adjust to the required pressure, thereby improving the detection efficiency and measurement accuracy.

[0024] It is worth noting that, in this embodiment, the ultrasonic cleaning standard leak automatic calibration device further includes an ultrasonic cleaning component 6, which has a cleaning chamber and is suitable for cleaning the leak hole 3 to be detected in the cleaning chamber. By providing the ultrasonic cleaning component 6, before detecting the leak hole 3 to be detected, the ultrasonic cleaning component 6 can clean the gas path of the leak hole 3 to be detected in the cleaning chamber to prevent the gas path of the leak hole 3 to be detected from being blocked by dust or impurities, thereby affecting the detection accuracy.

[0025] Preferably, in this embodiment, the ultrasonic cleaning standard leak automatic calibration device also includes a drying component 7, which has a drying chamber suitable for drying the leak hole 3 to be detected to prevent cleaning liquid from remaining in the air path of the leak hole 3 to be detected, which will also affect the detection accuracy of the leak hole 3 to be detected.

[0026] In detail, the drying chamber includes a purge chamber and a drying chamber. The purge chamber is provided with a fan, and the fan outlet is arranged toward the leak hole 3 to remove large water droplets on the leak hole 3; the drying chamber is provided with a heater, which is suitable for heating the airflow in the drying chamber to remove small water droplets and water stains remaining on the leak hole 3, thereby fully drying the leak hole 3.

[0027] In summary, the working process of the utility model is to first place the leak hole to be detected in the ultrasonic cleaning component to clean away the dust and impurities in its gas path, and then place it in the drying component for drying to make the internal gas path unobstructed; then connect the leak hole to be detected between the pressure controller and the standard flow meter, close the explosion-proof door, and make it meet the calibration conditions; during calibration, manually set the pressure setting value on the control component, and automatically adjust to the required pressure through the control component and the pressure controller, read the standard flow meter indication after the pressure stabilizes, and the calibration is completed.

[0028] The ultrasonic cleaning standard leak automatic calibration device shown in the utility model has the following advantages over the prior art:

[0029] (1) By providing an ultrasonic cleaning component, the ultrasonic cleaning component is used to clean the leak hole before testing it, so as to ensure that the gas path is unobstructed, the test data is accurate and reliable, and the measurement accuracy is high.

[0030] (2) By providing a pressure-stabilizing tank, the test pressure can reach a fixed stable value, making the test data accurate and reliable with high measurement accuracy.

[0031] For example, the specifications of a standard leak hole are pressure 0.3MPa, leakage rate 4L / min, and the leak hole gas path contains fine impurities. When the leak hole is tested using the existing technology, the pressure is between 0.292MPa-0.303MPa, and the leakage rate is about 3.720L / min. The pressure fluctuates to a certain extent, and the leakage rate is smaller than the specification value. Using the device shown in this embodiment, ultrasonic cleaning of impurities and then using a pressure stabilizing tank for pressure stabilization for testing, the pressure is basically fixed at 0.300MPa, and the leakage rate is about 3.985L / min, and the test result is more reliable.

[0032] (3) By setting the coordination between the control component and the pressure controller, the pressure value can be automatically adjusted to the required pressure during the test, which is simple and quick, greatly saving time. In the prior art, when testing the leak hole to be detected, the pressure needs to be repeatedly adjusted to reach a fixed value, which is time-consuming and labor-intensive, and is particularly difficult to adjust when the pressure value is very large or very small.

[0033] For example, the specification of a standard leak is 30kPa, 4.24mL / min. When using the existing technology to test it, it takes multiple attempts to manually adjust the pressure to 30kPa, which sometimes takes a lot of time and still cannot accurately adjust the pressure value. However, using the device shown in this embodiment, after the control component inputs the set value of 30kPa, it can be automatically adjusted to 30kPa in 3 seconds, greatly improving the detection efficiency.

[0034] (4) This embodiment is provided with an explosion-proof door, which can avoid the risk of high leakage causing harm to testers during high-voltage testing.

[0035] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An automatic calibration device for ultrasonic cleaning standard leak, characterized in that: include: An air source assembly, adapted to provide an air source; An air source control component, used for controlling the air source, comprising a first end and a second end arranged opposite to each other, wherein the first end is connected to the air source component, and the second end is connected to one end of the leak hole to be detected; A pressure gauge connected between the gas source control assembly and the leak hole to be detected; A standard flow meter is connected to the other end of the leak hole to be detected and is used for leak detection of the leak hole to be detected; An ultrasonic cleaning component, having a cleaning cavity, suitable for cleaning a leak hole to be detected placed in the cleaning cavity; The drying component has a drying chamber and is suitable for drying the leak hole to be detected.

2. The automatic calibration device for ultrasonic cleaning standard leak according to claim 1, characterized in that: The drying chamber comprises a purge chamber, a fan is arranged in the purge chamber, and an outlet of the fan is arranged toward the leak hole to be detected.

3. The automatic calibration device for standard leak by ultrasonic cleaning according to claim 1 or 2, characterized in that: The drying chamber comprises a drying chamber, a heating element is arranged in the drying chamber, and the heating element is suitable for heating the airflow in the drying chamber to dry the leak hole to be detected.

4. The automatic calibration device for ultrasonic cleaning standard leak according to claim 1, characterized in that: The ultrasonic cleaning standard leak automatic calibration device includes a whole machine frame and a door body, the door body closes the frame so that the whole machine frame has an installation space, the air source component, the air source control component, the pressure gauge, the standard flow meter, the ultrasonic cleaning component and the drying component are all arranged in the whole machine frame, and the door body is an explosion-proof door.

5. The automatic calibration device for ultrasonic cleaning standard leak according to claim 1, characterized in that: The gas source control assembly comprises a pressure-stabilizing tank connected to the gas source and a pressure controller connecting the pressure-stabilizing tank and the leak hole to be detected.

6. The automatic calibration device for ultrasonic cleaning standard leak according to claim 1, characterized in that: The ultrasonic cleaning standard leak automatic calibration device also includes a control component, and the air source control component is electrically connected to the control component.

Images