CN204831732U - Airtight perfromance detection device - Google Patents

Abstract

The utility model is suitable for the field of detection equipment, and provides an airtightness detection device, which includes a protective case, at least one set of detection mechanisms and a circuit board for controlling the work of each set of detection mechanisms; each set of detection mechanisms includes a Connected adapter, air pump, pressure sensor and pipeline connecting the adapter, pressure sensor and air pump; the pressure sensor is electrically connected to the circuit board, the air pump is installed in the protective case, one end of the adapter is fixed in the protective case, and the The other end extends out of the protective shell, and the protective shell is provided with an opening for the other end of the adapter to protrude from. By setting the detection mechanism and circuit board in the protective case, it is convenient to move and transport; and the air pump is used to change the air pressure of the item to be tested, and the pressure sensor is used to detect the air pressure of the item to be tested. Air pressure, so as to judge whether the airtightness of the item to be tested is good, the judgment is accurate, the use is convenient and safer, and the item to be tested will not be damaged.

Description

Air tightness detection device

technical field

The utility model belongs to the field of detection equipment, in particular to an air tightness detection device.

Background technique

Air tightness detection devices are often used in biological experimental research and medical in vitro diagnostic verification equipment. At present, the main air tightness detection device on the market is a high pressure leak detector. The working principle of the high-pressure leak detector is as follows: fill the container with a suitable liquid, seal the item to be tested and immerse it in the liquid of the container, and then pass high-pressure gas into the container; if the item to be tested leaks, the liquid in the container will It will enter the item to be tested through the leakage position, otherwise it is considered that the item to be tested has good airtightness, so as to complete the air tightness test of the material to be tested.

However, this kind of high-pressure leak detector needs to be connected with high-pressure gas, which is extremely inconvenient to use and has potential safety hazards; and the item to be tested needs to be immersed in the liquid, which is easy to damage the item to be tested.

Utility model content

The purpose of the utility model is to provide an air tightness detection device, which aims to solve the problem that the existing air tightness detection device needs to be connected with high-pressure gas, which is extremely inconvenient to use and has potential safety hazards; and the object to be tested needs to be immersed in the liquid , easy to damage the item to be tested.

The utility model is achieved in this way, an air tightness detection device, including a protective shell, at least one set of detection mechanism for changing the air pressure in the item to be tested and detecting the change of the air pressure to determine whether the air tightness of the item to be tested is good and the circuit boards that control the work of each set of the detection mechanism; the circuit board is installed in the protective case, and each set of the detection mechanism includes an adapter for connecting with the object to be tested, for changing the An air pump for air pressure in the item to be tested, a pressure sensor for detecting changes in air pressure in the item to be tested, and a pipeline connecting the adapter with the pressure sensor and the air pump; the pressure sensor is electrically connected to the circuit board The air pump is installed in the protective shell, the air pump is electrically connected to the circuit board, one end of the adapter is fixed in the protective shell, and the other end of the adapter protrudes from the In addition to the protective case, the protective case is provided with an opening for the other end of the adapter to protrude from.

Further, a support seat for supporting the adapter is also included, and the support seat is installed in the protective case.

Further, a clamping block for clamping the object to be tested protrudes from the support base, the other end of the adapter extends into the clamping block, and the clamping block extends through the opening. out of the protective case.

Further, the pipeline includes a three-way head, a first connecting pipe connecting the three-way head and the air pump, a second connecting pipe connecting the three-way head and the pressure sensor, and connecting the adapter with the air pump. The third connecting pipe of the tee joint.

Further, the pipeline further includes an adapter pipe adapted to communicate with the third connecting pipe and the adapter joint.

Further, the air pump includes a piston pump for changing the air pressure in the object to be tested and a stepping motor driving the piston pump, and the stepping motor is electrically connected to the circuit board.

Further, the protective case includes a bottom case and a face case covering the bottom case, and an accommodating cavity for accommodating the detection mechanism and the circuit board is formed between the bottom case and the face case. The opening is arranged on the face shell.

Further, a positioning seat for fixing the air pump is provided in the bottom case, and a groove for matching the positioning of the air pump is opened on the positioning seat.

Further, it also includes a fixed cover that cooperates with the positioning seat to clamp and fix the air pump, and the fixed cover is correspondingly provided with a slot that cooperates with the groove to accommodate the air pump.

Further, it also includes an inductive switch for detecting whether the object to be tested is connected to the adapter, and the inductive switch is installed on the protective case.

The utility model is provided with a detection mechanism and a circuit board in the protective shell to facilitate movement and transportation; and an air pump is used to change the air pressure of the item to be tested, and a pressure sensor is used to detect the air pressure of the item to be tested. By detecting whether the item to be tested can Maintain the changed air pressure to judge whether the airtightness of the item to be tested is good, the device is simple and light, the airtightness detection is more accurate, the efficiency is higher, the use is convenient and safer, and the item to be tested will not be damaged , a wide range of measurable objects.

Description of drawings

Fig. 1 is a schematic diagram of an exploded structure of an air tightness detection device provided by an embodiment of the present invention;

Fig. 2 is a three-dimensional structural schematic view when the internal structure of the airtightness detection device of Fig. 1 is connected to the object to be tested;

Fig. 3 is a schematic cross-sectional structural view of the airtightness detection device of Fig. 1 when it is connected to the item to be tested;

Fig. 4 is a schematic diagram of the connection of the airtightness detection device in Fig. 1 to detect the airtightness of the object to be tested.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Please refer to Fig. 1, Fig. 2 and Fig. 3, an air tightness detection device 100 provided by the embodiment of the utility model includes a protective case 1, at least one set of detection mechanisms 4 and a circuit board 2 for controlling the operation of each set of detection mechanisms 4 The circuit board 2 is installed in the protective case 1; the detection mechanism 4 is used to change the air pressure in the item 900 to be tested, such as inflating the item 900 to be tested or extracting the gas from the item 900 to be tested, so as to actively change the air pressure in the item 900 to be tested air pressure; and the detection mechanism 4 will also detect the change of the air pressure after actively changing the air pressure in the article to be tested 900; at this time, if the air pressure remains unchanged, it means that the airtightness of the article to be tested 900 is good; if the air pressure changes, it indicates that there is a leak in the item 900 to be tested. The circuit board 2 is used to control the work of each set of detection mechanisms 4 to realize automatic detection. The protective case 1 can protect the circuit board 2 and the detection mechanism 4 .

A set of detection mechanisms 4 can be installed in the protective case 1, or multiple sets of detection mechanisms 4 can be installed, so as to simultaneously detect multiple objects to be tested 900 and improve detection efficiency. For example, four sets of detection mechanisms 4 can be installed in the structure of the protective case 1 in FIG. 1 and FIG. 2 , but only one set of detection mechanisms 4 is shown in the protective case 1 for the convenience of clearly reflecting the airtightness detection device 100 . In other embodiments, more detection mechanisms 4 may be installed in the protective case 1 , or only one set of detection mechanisms 4 may be installed.

Each set of detection mechanisms 4 includes an adapter 70 , an air pump 50 , a pressure sensor 60 and a pipeline 80 . The adapter 70 is used to connect with the object 900 to be tested. The air pump 50 is used to change the air pressure in the object to be tested 900 , that is, to inflate the object to be tested 900 or extract gas from the object to be tested 900 . The pressure sensor 60 is used to detect changes in air pressure in the object 900 to be tested. After the air pump 50 actively changes the air pressure in the object to be tested 900, if the air pressure measured by the pressure sensor 60 changes, it is judged that there is a leak in the object to be tested 900; Item 900 is airtight. The pipeline 80 is connected with the adapter 70, the pressure sensor 60 and the air pump 50, that is, the adapter 70, the pressure sensor 60 and the air pump 50 are communicated through the pipeline 80, and when the adapter 70 is connected with the object 900 to be tested, a closed pipeline. The air pressure in the pipeline is changed by the air pump 50. After the air pressure changes, if the airtightness of the object to be tested 900 is good, the pressure sensor 60 will measure the air pressure in the pipeline to remain unchanged; if the object to be tested 900 leaks, then The pressure sensor 60 detects that the air pressure in the pipeline will change. For example, when the air pump 50 inflates the pipeline, it will simultaneously inflate the object 900 to be tested. If the object 900 leaks, the pressure sensor 60 will measure the air pressure in the pipeline to gradually decrease. If the air pump 50 extracts the gas in the pipeline, it will simultaneously extract the gas in the item 900 to be tested. If the item 900 leaks, the pressure sensor 60 will measure the air pressure in the pipeline to gradually increase. Therefore, whether the airtightness of the test item 900 is good can be judged by measuring whether the air pressure in the test item 900 changes by the pressure sensor 60 .

The pressure sensor 60 is electrically connected to the circuit board 2, and the circuit board 2 is installed in the protective case 1, the pressure sensor 60 is also located in the protective case 1, the pressure sensor 60 is protected by the protective case 1, and controlled by the circuit board 2 Pressure sensor 60.

Preferably, the pressure sensor 60 is an absolute pressure sensor. The absolute pressure in the object 900 to be tested is detected by the absolute pressure sensor, and the pressure value is detected by the circuit board 2 and compared with the set pressure. Specifically, after changing the pressure in the pipeline 80 and the object to be tested 900, after a period of time, the pressure value in the pipeline 80 or the object to be tested 900 is detected by an absolute pressure sensor. If there is a difference, it means that the airtightness of the object under test 900 is good; if the detected pressure value keeps changing or is the same as the set pressure, it means that the object under test 900 has leakage and poor airtightness.

The air pump 50 is electrically connected with the circuit board 2 , and the operation of the air pump 50 is controlled through the circuit board 2 . The air pump 50 is installed in the protective case 1 , and the air pump 50 is supported and protected by the protective case 1 . One end of the adapter 70 is fixed in the protective case 1 to support the adapter 70 through the protective case 1; An opening 121 protrudes from one end so that the adapter 70 can be connected with the object 900 to be tested.

The detection mechanism 4 and the circuit board 2 are arranged in the protective case 1 to facilitate movement and transportation. Use the air pump 50 to change the air pressure of the item 900 to be tested, and use the pressure sensor 60 to detect the air pressure of the item 900 to be tested, and determine the airtightness of the item 900 to be tested by detecting whether the item 900 to be tested can maintain the changed air pressure Whether it is good or not, the judgment is accurate, the use is convenient and safer, and the object 900 to be tested will not be damaged.

Further, the airtightness detection device 100 also includes a support base 31 installed in the protective case 1 . The adapter 70 is installed on the support base 31, and the adapter 70 is fixed and supported by the support base 31, which not only supports the adapter 70 more stably, but also facilitates assembly.

Further, the support base 31 is provided with a clamping block 311 for clamping the object to be tested 900, the other end of the adapter 70 extends into the clamping block 311, and the clamping block 311 protrudes out of the protective case 1 through the opening 121 . Setting the clamping block 311 to clamp the test object 900 can make it more convenient to carry out the air tightness test of the test object 900; at the same time, it can also keep the adapter 70 and the test object 900 relatively still, preventing the adapter from being affected by vibration. The sealing efficiency of the connection between 70 and the object under test 900.

Preferably, in order to make the adapter 70 well connected with the object to be tested 900 and protect the seal, the adapter 70 can be made of silica gel or rubber, that is, the adapter 70 can be a silicone head or a rubber head, so that the adapter 70 can be connected to the object to be tested. When the object 900 is connected, ensure that the seal between the adapter 70 and the object 900 to be tested is good.

In this embodiment, the clamping block 311 is U-shaped, and the object 900 to be tested can be inserted into the clamping block 311 from the top of the clamping block 311 and connected to the adapter 70 . In other embodiments, the clamping block 311 may be a splint disposed on both sides of the adapter 70 , and the object 900 to be tested is clamped by the splint.

In this embodiment, the support base 31 can fix and support four adapters 70 at the same time, and the corresponding support base 31 is provided with four clamping blocks 311 . In other embodiments, the support base 31 can also fixedly support only one adapter 70 , and only one clamping block 311 is disposed on the support base 31 . Of course, in some other embodiments, the support base 31 can also fixedly support other numbers of adapters 70 , and the support base 31 is provided with a corresponding number of clamping blocks 311 .

Further, the pipeline 80 includes a tee head 84, a first connecting pipe 81, a second connecting pipe 82 and a third connecting pipe 83; the first connecting pipe 81 communicates with the tee head 84 and the air pump 50, and the second connecting pipe 82 communicates with the three The through head 84 communicates with the pressure sensor 60 , and the third connecting pipe 83 communicates with the adapter 70 and the tee head 84 . The pipeline 80 is assembled by using the tee head 84 , the first connecting pipe 81 , the second connecting pipe 82 and the third connecting pipe 83 , which can facilitate the assembly and connection of the components of the detection mechanism 4 . In other embodiments, the pipe 80 may also be welded to form an integral structure. Of course, the adapter 70 can also be integrally formed with the pipe 80 .

Further, the pipeline 80 also includes an adapter pipe 85 adapted to communicate with the third connecting pipe 83 and the adapter 70 . An adapter pipe 85 is provided, and one end of the adapter pipe 85 is connected with the adapter 70 , and the other end is connected with the third connecting pipe 83 , so that the third connecting pipe 83 and the adapter 70 can be assembled and connected conveniently.

Please refer to FIG. 2 , FIG. 3 and FIG. 4 , further, the air pump 50 includes a piston pump 52 and a stepping motor 51 , and the stepping motor 51 is electrically connected to the circuit board 2 . The piston pump 52 is driven by the stepping motor 51 to change the air pressure in the object 900 to be tested. Using the piston pump 52 can change the size of the air pressure with good control, and the control is more precise.

The piston pump 52 includes a cylinder 521, a piston 522 slidingly installed in the cylinder 521 and an air valve 523 for controlling gas to enter and discharge the cylinder 521. The air valve 523 is installed on the cylinder 521. Connected to pipeline 80. The stepper motor 51 is connected to the circuit board 2 through a wire 511 . In order to facilitate the electrical connection between the circuit board 2 and the stepping motor 51, a connecting plug 21 can also be set on the circuit board 2, and the lead 511 of the stepping motor 51 can be directly inserted into the plug 21 to realize the electrical connection between the stepping motor 51 and the circuit board 2. sexually connected.

The working process of the air tightness detection device 100 is as follows:

The circuit board 2 controls the stepping motor 51 to work, and the stepping motor 51 drives the piston 522 to slide in the cylinder 521, thereby extracting the gas in the pipeline 80. Since the pipeline 80 is connected with the object 900 to be tested through the adapter 70, the gas to be tested can be extracted. The gas in the article 900 changes the air pressure in the article 900 to be tested; and the pipeline 80 communicates with the pressure sensor 60, the pressure sensor 60 can detect the change of the air pressure in the article 900 to be tested, if the air pressure in the article 900 to be tested remains unchanged , the airtightness of the test item 900 is good; if the air pressure measured by the pressure sensor 60 rises, it indicates that the test item 900 has a leak.

In other embodiments, the pipeline 80 can also be filled with air by the piston pump 52 .

Referring to Fig. 1, Fig. 2 and Fig. 3, the protective case 1 includes a bottom case 11 and a face case 12 covering on the bottom case 11, and a chamber for accommodating the detection mechanism 4 and the circuit board 2 is formed between the bottom case 11 and the face case 12. The cavity 10 is placed, and the opening 121 is disposed on the face shell 12 . The protective case 1 is composed of the bottom case 11 and the surface case 12 , which is convenient to process and manufacture, and also facilitates the installation of the circuit board 2 and the detection mechanism 4 . In this embodiment, since four sets of detection mechanisms 4 can be installed in the protective case 1, four openings 121 are provided on the face shell 12, so that the adapters 70 of the four sets of detection mechanisms 4 can be stretched out to connect the objects to be tested. 900.

Further, the surface shell 12 is provided with a support surface 122 for supporting the object 900 to be tested. The supporting surface 122 is provided to support the object to be tested 900, so as to better connect the object to be tested 900 to the adapter 70, and to facilitate detection. When the support base 31 is provided with a clamping block 311 , the clamping block 311 can cooperate with the supporting surface 122 to fix and support the object 900 to be tested, which can better keep the object 900 to be tested stable and facilitate detection.

Further, a positioning seat 32 for fixing the air pump 50 is provided in the bottom case 11 , and a groove 321 for positioning the air pump 50 is provided on the positioning seat 32 . The positioning seat 32 is provided, and the groove 321 is provided on the positioning seat 32, so that the air pump 50 can be positioned more conveniently, so as to fix the air pump 50 in the bottom case 11 and keep the air pump 50 stable.

Further, the air tightness detection device 100 also includes a fixed cover 33, and the fixed cover 33 is provided with a slot 331; when the fixed cover 33 is installed on the positioning seat 32, the fixed cover 33 cooperates with the positioning seat 32 to clamp the air pump 50 , so that the air pump 50 is fixed. At the same time, when the fixed cover 33 covers the positioning seat 32, the slot 331 is located on the corresponding groove 321, and the air pump 50 is fixed between the groove 321 and the slot 331, so as to better fix the air pump 50.

In this embodiment, four sets of detection mechanisms 4 can be installed in the protective case 1 , therefore, the positioning seat 32 is provided with four grooves 321 , and the corresponding fixed cover 33 is provided with four slots 331 . In other embodiments, other numbers of grooves 321 may be provided on the positioning seat 32 , and corresponding slots 331 may be provided on the fixing cover 33 .

In this embodiment, the positioning seat 32 and the bottom shell 11 are integrally formed, which is convenient for processing. In other embodiments, the positioning seat 32 can also be made separately, and then installed in the bottom case 11 .

Further, the airtightness detection device 100 also includes a protective case 1, and an inductive switch is installed in the clamping block 311 to detect whether the object 900 to be tested is connected to the adapter 70, so as to control the detection mechanism through the circuit board 2 4 work automatically. Preferably, an inductive switch can also be installed in the clamping block 311 , so as to more directly and accurately detect whether the object 900 to be tested is connected to the adapter 70 . Specifically, the inductive switch may be an optocoupler switch, a tact switch, and the like.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. An airtightness detection device, characterized in that it comprises a protective case, at least one set of detection mechanism and control for changing the air pressure in the object to be tested and detecting the air pressure change to determine whether the airtightness of the object to be tested is good Each set of circuit boards for the detection mechanism to work; the circuit boards are installed in the protective case, and each set of the detection mechanism includes an adapter for connecting with the item to be tested, for changing the an air pump for air pressure in the item, a pressure sensor for detecting changes in air pressure in the item to be tested, and a pipeline connecting the adapter with the pressure sensor and the air pump; the pressure sensor is electrically connected to the circuit board , the air pump is installed in the protective shell, the air pump is electrically connected with the circuit board, one end of the adapter is fixed in the protective shell, and the other end of the adapter sticks out of the protective shell. Outside the shell, the protective shell is provided with an opening for the other end of the adapter to protrude from. 2. The airtightness detection device according to claim 1, further comprising a support seat for supporting the adapter, the support seat is installed in the protective case. 3. The air-tightness testing device according to claim 2, wherein a clamping block for clamping the object to be tested is protruded from the support base, and the other end of the adapter extends into the In the clamping block, the clamping block protrudes out of the protective shell through the opening. 4. The air tightness detection device according to claim 1, wherein the pipeline comprises a three-way head, a first connecting pipe connecting the three-way head and the air pump, and connecting the three-way head and the air pump. The second connecting pipe of the pressure sensor and the third connecting pipe connecting the adapter and the tee. 5 . The airtightness testing device according to claim 4 , wherein the pipeline further comprises an adapter pipe adapted to communicate with the third connection pipe and the adapter joint. 6 . 6. The air tightness detection device according to claim 1, wherein the air pump comprises a piston pump for changing the air pressure in the object to be tested and a stepping motor driving the piston pump, the step The feeder is electrically connected with the circuit board. 7. The airtightness detection device according to any one of claims 1-6, wherein the protective case comprises a bottom case and a surface case covered on the bottom case, and the bottom case is connected to the bottom case An accommodating cavity for accommodating the detection mechanism and the circuit board is formed between the face shells, and the opening is arranged on the face shells. 8. The air tightness detection device according to claim 7, wherein a positioning seat for fixing the air pump is provided in the bottom case, and a groove for matching the positioning of the air pump is opened on the positioning seat . 9. The air-tightness detection device according to claim 8, further comprising a fixed cover that cooperates with the positioning seat to clamp and fix the air pump, and the fixed cover is correspondingly provided with a cavity for matching the groove. slot for the air pump. 10. The airtightness detection device according to any one of claims 1-6, further comprising an inductive switch for detecting whether the article to be tested is connected to the adapter, the inductive switch Installed on the protective case.