CN212693178U

CN212693178U - Hand-held type gas tightness detector

Info

Publication number: CN212693178U
Application number: CN202021895062.0U
Authority: CN
Inventors: 钟阳光
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2021-03-12
Anticipated expiration: 2030-09-02

Abstract

The utility model provides a hand-held type gas tightness detector belongs to gas tightness detection device technical field. It has solved the relatively poor problem of air tightness detection device use flexibility among the prior art. The handheld air tightness detector comprises a shell, wherein an air pump, a differential pressure sensor, a first ventilation pipeline, a second ventilation pipeline and a ventilation branch pipe are arranged in the shell, the air inlet ends of the first ventilation pipeline and the second ventilation pipeline are communicated with the air outlet of the air pump, the air outlet ends of the first ventilation pipeline and the second ventilation pipeline are respectively connected with two air inlet connectors of the differential pressure sensor in a one-to-one correspondence mode, one end of the ventilation branch pipe is connected with the second ventilation pipeline, and the other end of the ventilation branch pipe extends out of the shell to be used for being connected with a product to be. The utility model has the advantages of convenient carrying and use.

Description

Hand-held type gas tightness detector

Technical Field

The utility model belongs to the technical field of the gas tightness detection device, a hand-held type gas tightness detector is related to.

Background

At present, many products in the market, such as puncture outfits, defecation drainage tubes, trachea cannulas and the like in the field of medical instruments, or air-conditioning refrigeration pipelines and the like in the field of industry, have strict air tightness requirements for the products. Therefore, how to conveniently and accurately detect the air tightness of the product is a topic of research by people.

The traditional air tightness detection mode adopts a water immersion or oil immersion visual bubble method, the method is simple in equipment and low in detection cost, but has low detection precision and efficiency, and human factor influence is large, and meanwhile, the method can bring adverse effects such as dampness rusting and impurity immersion to workpieces. For this reason, with the development of scientific technology, instruments specially used for airtightness detection appear on the market.

The air tightness detection device disclosed in the Chinese patent document (application No. 201920201858.2; No. CN 209979139U) comprises a base, an air inflation device arranged on the base, a driving air cylinder arranged at the rear end of the base and a foot switch connected with the driving air cylinder, wherein the air inflation device comprises two air cylinder fixing frames and two air cylinders fixedly arranged in the air cylinder fixing frames, and piston rods of the air cylinders are connected with output shafts of the driving air cylinders. The device is large in size and heavy in weight, cannot be carried about and used at any time, and is usually placed on a working table for use. Therefore, the apparatus has a problem of poor flexibility in use.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a hand-held type gas tightness detector convenient to hand-carry, convenient to use.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a hand-held type gas tightness detector, includes the casing, its characterized in that, be equipped with air pump, differential pressure sensor, vent line one, vent line two and branch pipe of ventilating in the casing, the inlet end of vent line one and vent line two all is linked together with the gas outlet of air pump, the end of giving vent to anger of vent line one and vent line two is connected with two air inlet connector one-to-one of differential pressure sensor respectively, the one end and the vent line two of branch pipe of ventilating are connected, and the other end of branch pipe of ventilating stretches out the casing outside and is used for being connected with waiting to detect the product.

This gas tightness detector is when using, will wait to detect the product and connect on the branch pipe of ventilating earlier to make the junction between the two form sealedly, guarantee that the branch pipe gas of ventilating off-gas can all get into the inside of waiting to detect the product. After the connection is completed, the air pump is started, the air discharged by the air pump enters the first air pipeline and the second air pipeline respectively, and partial air in the second air pipeline is conveyed to the interior of the product to be detected through the air branch pipe. At this time, if the differential pressure in the first vent pipeline and the second vent pipeline detected by the differential pressure sensor is zero and the rated differential pressure is maintained unchanged, the problem of air leakage of the product to be detected does not exist, and the air tightness is qualified. And if the product to be detected leaks, the gas in the vent pipe II is continuously discharged from the leakage position of the product to be detected to the outside, the gas pressure of the vent pipe II is obviously smaller than that of the vent pipe I, and at the moment, the pressure difference sensor detects that the pressure difference between the vent pipe I and the vent pipe II is obvious, so that the gas tightness of the product to be detected does not reach the standard. The hand-held air tightness detector integrates the components such as the air pump, the differential pressure sensor and the like in the shell, and equipment which can be carried about and used at will is formed, so that the hand-held air tightness detector has the characteristics of high use flexibility, convenience in use and the like.

In the above-mentioned hand-held type gas tightness detector, be connected with the connecting pipe on the gas outlet of air pump, vent line one and vent line two are all linked together through the gas outlet of connecting pipe with the air pump, be equipped with flow control valve on the connecting pipe. Through setting up flow control valve, can adjust the gas flow in the connecting tube according to the demand of different products or the requirement that detects the precision, and then adjust the gas flow in vent line one and vent line two. Through reducing the gas flow in vent line one and the vent line two, can promote the sensitivity that detects, and then promote the precision grade that detects.

In the above-mentioned hand-held type gas tightness detector, still be equipped with the pressure sensor who is used for detecting the interior gas pressure of connecting tube on the connecting tube between the gas outlet of flow control valve and air pump. The required detection pressure of the product to be detected is different according to the difference, and the working pressure of the air pump can be detected in real time by arranging the pressure sensor on the connecting pipe, so that the working pressure of the air pump can be obtained at any time in the product detection process, and the working pressure can be adjusted as required to ensure that the product detection process has proper detection pressure.

In the above-mentioned hand-held type gas tightness detector, still be equipped with three way connection in the casing, the one end of connecting pipe is connected with the gas outlet of air pump, the other end of connecting pipe and one of them interface connection of three way connection, the inlet end of ventilation pipe one and ventilation pipe two is connected with two other interfaces one-to-one of three way connection respectively. Three way connection's setting can not only make things convenient for the connection between connecting pipe, vent line one and the vent line two for this instrument is made conveniently, simultaneously, can also guarantee that air pump combustion gas can be carried to vent line one and vent line two on average, with the precision of guaranteeing to detect.

In the above-mentioned hand-held type gas tightness detector, the branch of ventilating includes the external hose that is located the casing outside and is located the inside branch connection pipe that just one end is connected with vent line two of casing, link firmly the coupling on the diapire of casing, the one end of external hose is passed through the coupling and is connected with the other end of branch connection pipe, the other end of external hose is connected with and is used for waiting to detect the joint that the product is connected. Through attach fitting on external hose, can be convenient for with wait to detect the product and be connected, guarantee the leakproofness of junction simultaneously. The external hose has flexibility, so that when the external hose is connected with a product to be detected, the angle of connection can be adjusted at will, and therefore the external hose can be connected with the product to be detected more conveniently.

In the above-mentioned hand-held type airtightness detector, the joint and the external hose are detachably connected. The product is waited to the difference, and required joint may be different, consequently, connects and can dismantle with external hose and be connected, if threaded connection or joint are connected, can be convenient for wait to detect different joints of product quick replacement to the difference to promote the convenience that detects.

In the above-mentioned hand-held type airtightness detector, a storage battery is further arranged in the housing. The storage battery is arranged, so that the air tightness detector can be used in occasions where external power supply cannot be connected, and the air tightness detector is more flexible and convenient to use.

In the above-mentioned hand-held type airtightness detector, a display screen is provided on the front side surface of the casing. Through set up the display screen on the leading flank at the casing, can look over the result that detects more directly perceivedly, can look over information such as the electric quantity of battery, the operating pressure of air pump simultaneously at any time.

Compared with the prior art, this hand-held type gas tightness detector has following advantage:

1. the hand-held air tightness detector integrates the components such as the air pump, the differential pressure sensor and the like in the shell, and forms equipment which can be carried about and used at will, so that the hand-held air tightness detector has the advantages of high use flexibility, convenience in use, low manufacturing cost and the like.

2. This hand-held type gas tightness detector has still has easy operation's advantage, consequently is lower to operating personnel's technical requirement, is fit for extensively using widely.

Drawings

Fig. 1 is a schematic perspective view of the hand-held air-tightness detector.

Fig. 2 is a schematic view of the internal structure of the hand-held air-tightness detector.

In the figure, 1, a housing; 2. an air pump; 3. a differential pressure sensor; 31. an air inlet joint; 4. a first ventilation pipeline; 5. a second ventilation pipeline; 6. a vent branch; 61. a hose is connected externally; 62. connecting branch pipes; 7. a connecting pipe; 8. a flow regulating valve; 9. a pressure sensor; 10. a three-way joint; 11. a pipe joint; 12. a storage battery; 13. a display screen; 14. an operation button; 15. a circuit board; 16. and (4) a joint.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the handheld air tightness detector comprises a shell 1, wherein an air pump 2, a differential pressure sensor 3, a first ventilation pipeline 4, a second ventilation pipeline 5, a ventilation branch pipe 6, a three-way connector 10, a storage battery 12, a circuit board 15 and other parts are arranged in the shell 1, a display screen 13 is arranged at the top of the front side surface of the shell 1, the display screen 13 is arranged on the front side surface of the shell 1, the detection result can be viewed more intuitively, and meanwhile, the electric quantity of the storage battery 12, the working pressure of the air pump 2 and other information can be viewed at any time. Meanwhile, for convenience of operation, an operation button 14 is provided on the lower side of the display 13, and the air pump 2, the differential pressure sensor 3, the storage battery 12, and the operation button 14 are all connected to a circuit board 15.

Specifically, as shown in fig. 2, a connection pipe 7 is connected to an air outlet of the air pump 2, one end of the connection pipe 7 is connected to the air outlet of the air pump 2, the other end of the connection pipe 7 is connected to one of the connectors of the three-way joint 10, and the air inlets of the first ventilation pipeline 4 and the second ventilation pipeline 5 are respectively connected to the other two connectors of the three-way joint 10 in a one-to-one correspondence manner. Three way connection 10's setting can not only make things convenient for the connection between connecting pipe 7, vent line one 4 and the vent line two 5 for this instrument is made conveniently, and simultaneously, can also guarantee that 2 gas physical stamina of air pump carry to vent line one 4 and vent line two 5 on average, with the precision of guaranteeing to detect. The connecting pipe 7 is provided with a flow regulating valve 8 and a pressure sensor 9 for detecting the gas pressure in the connecting pipe 7, and the pressure sensor 9 is positioned between the flow regulating valve 8 and the gas outlet of the gas pump 2. The pressure sensor 9 can detect the working pressure of the air pump 2 in real time, so that the working pressure of the air pump 2 can be acquired at any time in the product detection process, and the working pressure can be adjusted as required to ensure that the product detection process has proper detection pressure.

Continuing to refer to fig. 2, the air outlet ends of the first vent pipeline 4 and the second vent pipeline 5 are respectively connected with the two air inlet connectors 31 of the differential pressure sensor 3 in a one-to-one correspondence manner, one end of the vent branch pipe 6 is connected with the second vent pipeline 5, and the other end of the vent branch pipe 6 extends out of the shell 1 to be connected with a product to be detected. The differential pressure sensor 3 is a prior art and is available on the market directly. Specifically, the vent branch pipe 6 comprises an external hose 61 positioned outside the shell 1 and a connecting branch pipe 62 positioned inside the shell 1 and connected with the vent pipeline two 5 at one end, a pipe joint 11 is fixedly connected to the bottom wall of the shell 1, one end of the external hose 61 is connected with the other end of the connecting branch pipe 62 through the pipe joint 11, and the other end of the external hose 61 is detachably connected with a joint 16 used for being connected with a product to be detected. By connecting the joint 16 to the extension hose 61, the connection with the product to be detected can be facilitated while ensuring the sealing property of the connection. The external hose 61 has flexibility, so that when the external hose 61 is connected with a product to be detected, the connection angle of the external hose 61 can be adjusted at will, and therefore the external hose 61 can be connected with the product to be detected more conveniently.

When the air tightness detector is used, a product to be detected is connected to the joint 16 of the ventilating branch pipe 6, the joint between the product and the ventilating branch pipe is sealed, and the gas exhausted from the ventilating branch pipe 6 can completely enter the interior of the product to be detected. After the connection is completed, the air pump 2 is started, the gas discharged by the air pump 2 respectively enters the first ventilation pipeline 4 and the second ventilation pipeline 5, and part of the gas in the second ventilation pipeline 5 is conveyed to the interior of the product to be detected through the branch ventilation pipe 6. At this time, if the differential pressure in the first vent pipeline 4 and the second vent pipeline 5 detected by the differential pressure sensor 3 is zero and the rated differential pressure is maintained unchanged, it is indicated that the product to be detected has no air leakage problem, and the air tightness is qualified. If the product to be detected leaks, the gas in the vent pipe II 5 is continuously discharged from the leakage position of the product to be detected to the outside, the gas pressure of the vent pipe II 5 is obviously smaller than the gas pressure in the vent pipe I4, and at the moment, the pressure difference sensor 3 detects that the obvious pressure difference occurs between the vent pipe I4 and the vent pipe II 5, so that the gas tightness of the product to be detected does not reach the standard.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although 1, the housing is used more herein; 2. an air pump; 3. a differential pressure sensor; 31. an air inlet joint; 4. a first ventilation pipeline; 5. a second ventilation pipeline; 6. a vent branch; 61. a hose is connected externally; 62. connecting branch pipes; 7. a connecting pipe; 8. a flow regulating valve; 9. a pressure sensor; 10. a three-way joint; 11. a pipe joint; 12. a storage battery; 13. a display screen; 14. an operation button; 15. a circuit board; 16. linker, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a hand-held type gas tightness detector, includes casing (1), its characterized in that, be equipped with air pump (2), differential pressure sensor (3), vent line (4), vent line two (5) and branch of ventilating (6) in casing (1), the inlet end of vent line (4) and vent line two (5) all is linked together with the gas outlet of air pump (2), the end of giving vent to anger of vent line (4) and vent line two (5) is connected with two air-in connectors (31) one-to-one of differential pressure sensor (3) respectively, the one end of branch of ventilating (6) is connected with vent line two (5), and the other end of branch of ventilating (6) stretches out casing (1) outside and is used for and waits to detect the product connection.

2. The handheld air tightness detector according to claim 1, wherein a connecting pipe (7) is connected to an air outlet of the air pump (2), the first ventilation pipeline (4) and the second ventilation pipeline (5) are both communicated with the air outlet of the air pump (2) through the connecting pipe (7), and a flow regulating valve (8) is arranged on the connecting pipe (7).

3. The hand-held air-tightness detector according to claim 2, characterized in that a pressure sensor (9) for detecting the gas pressure in the connecting pipe (7) is further arranged on the connecting pipe (7) between the flow regulating valve (8) and the air outlet of the air pump (2).

4. The hand-held air tightness detector according to claim 2 or 3, wherein a three-way joint (10) is further disposed in the housing (1), one end of the connecting pipe (7) is connected to an air outlet of the air pump (2), the other end of the connecting pipe (7) is connected to one of the interfaces of the three-way joint (10), and the air inlet ends of the first ventilation pipeline (4) and the second ventilation pipeline (5) are respectively connected to the other two interfaces of the three-way joint (10) in a one-to-one correspondence manner.

5. The hand-held air tightness detector according to claim 1, 2 or 3, wherein the air vent branch pipe (6) comprises an external hose (61) located outside the housing (1) and a connecting branch pipe (62) located inside the housing (1) and having one end connected with the second air vent pipeline (5), a pipe joint (11) is fixedly connected to the bottom wall of the housing (1), one end of the external hose (61) is connected with the other end of the connecting branch pipe (62) through the pipe joint (11), and the other end of the external hose (61) is connected with a joint (16) for connecting with a product to be detected.

6. The hand-held air-tightness detector according to claim 5, characterized in that the connector (16) is detachably connected to the external hose (61).

7. The hand-held air-tightness detector according to claim 1, 2 or 3, characterized in that a storage battery (12) is further provided inside the housing (1).

8. The hand-held air-tightness detector according to claim 1, 2 or 3, characterized in that a display screen (13) is provided on the front side of the housing (1).