CN218994658U - Air leakage detection device - Google Patents
Air leakage detection device Download PDFInfo
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- CN218994658U CN218994658U CN202223011904.3U CN202223011904U CN218994658U CN 218994658 U CN218994658 U CN 218994658U CN 202223011904 U CN202223011904 U CN 202223011904U CN 218994658 U CN218994658 U CN 218994658U
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- air
- leakage detection
- detection device
- air leakage
- flow sensor
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Abstract
The utility model relates to the technical field of air leakage detection, and particularly discloses an air leakage detection device, which comprises: a frame; the fan is arranged on the frame and is provided with an air inlet and an air outlet; one end of the air pipe is connected with the air outlet; the probe of the thermocouple type flow sensor is arranged in the air pipe; a force sensor mounted on the frame; and the controller is used for being electrically connected with the fan, the thermocouple type flow sensor and the pressure sensor. The utility model discloses an air leakage detection device, which replaces an original leather-supporting tube type flow sensor by a thermocouple type flow sensor so that the air leakage detection device is not easy to break down.
Description
Technical Field
The utility model relates to the technical field of air tightness detection of devices, in particular to an air leakage detection device.
Background
When some devices with high requirements on tightness are produced, the welded devices are required to be subjected to air tightness test through an air leakage detection device, so that the qualification of the devices is ensured. When the air leakage detection device works, the air leakage detection device needs to be connected with the device to be detected through a pipeline, and after connection is completed, the device to be detected is inflated through the air leakage detection device. After the inflation is completed, the air leakage detection device detects the air pressure in the connecting pipe through the pitot tube arranged by the air leakage detection device. The pitot tube is provided with small holes and the detection is usually performed in a production plant. When the air leakage detection device works through the pitot tube, the holes on the pitot tube are easily blocked by small particles such as dust, and after the pitot tube is blocked, the air leakage detection device cannot work normally.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
The utility model discloses an air leakage detection device which is used for solving the problem that a pitot tube in the existing air leakage detection device is easy to block.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
air leakage detection device includes:
a frame;
the fan is arranged on the frame and is provided with an air inlet and an air outlet;
one end of the air pipe is connected with the air outlet;
the probe of the thermocouple type flow sensor is arranged in the air pipe;
the pressure sensor is arranged on the rack;
and the controller is used for being electrically connected with the fan, the thermocouple type flow sensor and the pressure sensor.
Preferably, the air duct comprises a first part, a second part and a third part which are sequentially connected, the pipe diameter of the second part is smaller than that of the first part and the third part, and the probe is arranged in the second part.
Preferably, the junction of the first and second portions is coherent.
Preferably, the first and third portions are both "frusto-conical" tubes and the second portion is a straight thin tube.
Preferably, the second portion is a short tube.
Preferably, the air leakage detection device further comprises a connecting pipe for connecting the air pipe and the device to be detected.
Preferably, the air leakage detection device further comprises a rolling member, and the rolling member is rotatably connected to the frame.
Compared with the prior art, the utility model has the beneficial effects that:
according to the air leakage detection device provided by the utility model, the thermocouple type flow sensor is arranged in the air pipe, so that when the air velocity in the air pipe flows, the flowing air takes away the heat at the thermocouple, and the air velocity and the air volume can be obtained. The probe of the thermocouple type flow sensor is not easy to influence, so that the stability of the air leakage detection device is greatly improved. By arranging the pressure sensor, the detection device can learn real-time pressure information in the device to be detected. Through setting up the controller, be convenient for control and in time learn flow, wind speed and pressure information to the fan.
In addition, by dividing the air duct into three parts and arranging the probe of the thermocouple type flow sensor at the second part with smaller pipe diameter, the flow sensor can test the air quantity and the air speed more accurately. The connection part of the first part and the second part is connected, so that the air flow can flow smoothly.
Drawings
FIG. 1 is a schematic diagram of a first view angle of an air leakage detecting device according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a second view angle of the air leakage detecting device according to an embodiment of the present utility model.
Description of main reference numerals: 10-frame, 20-fan, 21-air inlet, 22-air outlet, 30-tuber pipe, 31-first part, 32-second part, 33-third part, 40-thermocouple type flow sensor, 41-probe, 50-pressure sensor, 60-controller, 70-connecting pipe, 80-rolling element.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.
The technical scheme of the utility model will be further described with reference to the examples and the accompanying drawings.
Examples
When the air leakage detection device is used for carrying out the device to be detected, the fan is required to be communicated with the device, the device is ventilated through the fan, and after the air pressure in the device to be detected is increased to a set value by the fan under the condition that the device is sealed, the air flow of the fan cannot enter the device to be detected again when the air pressure is stable. And if the device leaks, the fan can continue to ventilate the device to be detected on the basis of maintaining the air pressure in the device to be detected, and the flow sensor in the air pipe monitors the air flow in the air pipe at the moment, so that the air leakage of the device to be detected is concluded.
Conventional air leakage detection devices typically use a pitot tube to measure the air velocity in the air duct, but the pitot tube is provided with small holes, and the device to be tested is usually located in a production plant, and the small holes on the pitot tube are easily blocked, so that the air leakage detection device fails.
Therefore, the utility model discloses an air leakage detection device which replaces the original leather-tupe flow sensor by a thermocouple type flow sensor, so that the air leakage detection device is not easy to break down.
Specifically, referring to fig. 1-2, the air leakage detecting apparatus includes a frame 10, the frame 10 is a frame structure, and a fan 20 is installed at the bottom of the frame 10. The blower 20 is provided with an air inlet and an air outlet 22, and in order to facilitate connection of the blower 20 with other pipes, the opening of the blower 20 is generally upward. The air duct 30 is disposed above the blower 20, and one end of the air duct 30 is connected with the air outlet 22 of the blower 20, a thermocouple type flow sensor 40 is mounted on the air duct 30, and a probe 41 of the thermocouple type flow sensor 40 is disposed in the air duct 30. Also mounted on the housing 10 is a pressure sensor 50, the probe of the pressure sensor 50 typically being used to be placed within the device under test for detecting the air pressure within the device under test. The controller 60 is similarly mounted on the frame 10, and the controller 60 and the fan 20, the thermocouple type flow sensor 40 and the pressure sensor 50 are electrically connected, and the controller 60 is used for controlling the operation of the fan 20 and receiving data fed back by the thermocouple type flow sensor 40 and the pressure sensor 50.
The controller 60 includes a processor, a motherboard and a display, and the signals fed back from the thermocouple type flow sensor 40 and the pressure sensor 50 and the on/off control of the fan 20 can be displayed by the display.
In order to facilitate the communication between the air leakage detecting device and the device to be detected, the other end of the air duct 30 is typically further connected to a connecting pipe 70, and the connecting pipe 70 connects the air duct 30 and the device to be detected together.
In use, after the device under test is sealed, the air duct 30 and the device under test are connected together by the connecting tube 70. Then, a pressure value is set on the controller 60 according to the test pressure required by the device to be tested, the fan 20 is turned on, the fan 20 blows air to the device to be tested at the moment, and after the pressure in the device to be tested reaches the set pressure value and temperature, real-time wind speed, wind quantity and pressure information can be observed through operating a display screen of the controller 60 at the moment.
When the pressure information is stable after the fan 20 is started, the wind speed and the wind quantity data on the display are observed, and if the wind speed and the wind quantity are both 0 at the moment, the device to be tested is indicated to be free from air leakage. If the wind speed and the wind quantity on the display are both values larger than 0, the leakage of the device to be tested is indicated, and the fan 20 needs to continuously blow to maintain the pressure in the device to be tested.
Further, in an embodiment of the present utility model, the air duct 30 includes a first portion 31, a second portion 32, and a third portion 33 connected in sequence. Wherein the tube diameter of the second portion 32 is smaller than the tube diameters of the first portion 31 and the third portion 33, and a probe 41 of the thermocouple flow sensor 40 is disposed within the second portion 32. Based on the pipe diameter of the second portion 32 being smaller than the pipe diameters of the first portion 31 and the third portion 33, it is known from bernoulli's law that the wind velocity in the second portion 32 is now greater than the flow velocity in the first portion 31 and the third portion 33. On the basis of faster wind speed in the second portion 32, the temperature change at the thermocouple is more obvious, that is, the thermocouple type flow sensor 40 and the pressure sensor 50 can more accurately measure the wind speed in the air duct 30 when the pressure is stable, that is, whether the device to be detected leaks or not can be accurately judged.
And the connection of the first portion 31 and the second portion 32 is generally coherent so that the air flow can smoothly enter from the first portion 31 into the second portion 32.
Specifically, the first portion 31 and the three portions are each designed as a "truncated cone" shaped tube, and the second portion 32 is provided as a thin straight tube. The first portion 31 and the third portion 33 are easy to process and the air flow can smoothly enter from the first portion 31 to the second portion 32.
In order to enable a smooth flow of the air flow in the second portion 32, the length of the second portion 32 should be limited, i.e. the second portion 32 is provided as a short tube. The thin and straight and shorter second portion 32 allows the detection accuracy of the thermocouple type flow sensor 40 to be improved on the basis of ensuring the normal circulation of the gas.
In order to facilitate the movement of the air leakage detection device, a rolling element 80 is arranged at the bottom of the frame 10, the rolling element 80 is rotationally connected with the frame 10, and when the air leakage detection device needs to be moved, the air leakage detection device can be driven to move together only by pushing the frame 10.
The rolling member 80 may be a roller or other form of product that imparts a coefficient of friction.
Specifically, there are two methods of operation for the controller 60. Wherein the pressure is adjusted as follows: inputting the pressure value to be tested of the device to be tested, and reading the wind speed and the wind quantity after the pressure is stable according to the start test.
The fan 20 is adjusted to: the frequency of the fan 20 is manually adjusted, and the pressure is tested according to the beginning of the test to see whether the pressure accords with the pressure value required to be tested by the device to be tested, if the pressure is large, the frequency is reduced, the pressure is small, the frequency is increased, and the wind speed and the wind quantity can be read after the pressure is stable. The operator can freely select according to the operation habit.
It will be understood that equivalents and modifications will occur to those skilled in the art based on the present utility model and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present utility model.
Claims (7)
1. Air leakage detection device, its characterized in that includes:
a frame;
the fan is arranged on the frame and is provided with an air inlet and an air outlet;
one end of the air pipe is connected with the air outlet;
the probe of the thermocouple type flow sensor is arranged in the air pipe;
the pressure sensor is arranged on the rack;
and the controller is used for being electrically connected with the fan, the thermocouple type flow sensor and the pressure sensor.
2. The air leakage detection device according to claim 1, wherein the air duct comprises a first part, a second part and a third part which are sequentially connected, the pipe diameter of the second part is smaller than that of the first part and the third part, and the probe is arranged in the second part.
3. The air leakage detection apparatus according to claim 2, wherein the junction of the first portion and the second portion is coherent.
4. A device for detecting a leakage of air according to claim 3, wherein the first and third portions are each "truncated" cone-shaped tubes and the second portion is a thin straight tube.
5. The air leakage detection device of claim 4, wherein the second portion is a short tube.
6. The apparatus according to claim 1, further comprising a connection pipe for connecting the air duct and the device under test.
7. The apparatus of claim 1, further comprising a rolling member rotatably coupled to the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223011904.3U CN218994658U (en) | 2022-11-11 | 2022-11-11 | Air leakage detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223011904.3U CN218994658U (en) | 2022-11-11 | 2022-11-11 | Air leakage detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218994658U true CN218994658U (en) | 2023-05-09 |
Family
ID=86219097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223011904.3U Active CN218994658U (en) | 2022-11-11 | 2022-11-11 | Air leakage detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218994658U (en) |
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2022
- 2022-11-11 CN CN202223011904.3U patent/CN218994658U/en active Active
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