CN218885329U

CN218885329U - Gas microleakage detecting system

Info

Publication number: CN218885329U
Application number: CN202320170155.4U
Authority: CN
Inventors: 王庆军; 屠国权
Original assignee: B&P AUTOMATION DYNAMICS Ltd
Current assignee: B&P AUTOMATION DYNAMICS Ltd
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2023-04-18
Anticipated expiration: 2033-01-18

Abstract

The utility model provides a gas microleakage detecting system, including differential pressure detection mechanism, self-checking mechanism and ventilation structure, differential pressure detection mechanism includes the mount, and differential pressure sensor is installed to one side of mount, and one end of differential pressure sensor is connected with the pressure release solenoid valve, and airtight head is installed to the bottom of mount; the self-checking mechanism comprises a mounting plate, a pressurizing air cylinder is fixedly mounted on one side of the mounting plate, an air outlet of the pressurizing air cylinder is connected with an air pipe, an airtight head contact plate is fixedly mounted at the top end of the mounting plate, a through hole is formed in the airtight head contact plate, and the other end of the air pipe is connected with the bottom end of the through hole in a sealing mode. The utility model discloses a setting of self-checking mechanism can realize carrying out quick self-checking to the differential pressure sensor before the gas tightness detects at every turn to the condition emergence of avoiding the false retrieval is in the timely discovery of differential pressure sensor after the problem appears, has high detection stability and repeatability.

Description

Gas microleakage detecting system

Technical Field

The utility model belongs to the technical field of the gas tightness detects, more specifically says, in particular to gas microleakage detecting system.

Background

In the production process of some workpieces with higher air tightness requirements, the air tightness of the workpieces needs to be detected so as to ensure the product quality of the workpieces.

At present common gas leakage detection mainly is helium test and soap bubble method (brush soap bubble manual observation), often need a plurality of test workers to mutually support just can accomplish the gas tightness detection to the work piece when detecting, test worker's intensity of labour is big, and efficiency of software testing is low, the test cost is higher, be difficult to satisfy the test needs of large-scale radio frequency product, in addition still there is the mode that adopts the differential sensor of minute-pressure to carry out the gas tightness detection to the work piece among the prior art, its detection precision depends on the sensor, if the differential sensor of minute-pressure breaks down and not in time found when using, then hardly guarantee the precision that detects.

Therefore, in view of the above, research and improvement are made on the existing structure and defects, and a gas microleakage detection system is provided to achieve the purpose of having more practical value.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a gas microleakage detecting system is reached by following specific technological means:

a gas microleakage detection system comprises a micropressure difference detection mechanism, a self-detection mechanism and a ventilation structure, wherein the micropressure difference detection mechanism comprises a fixing frame, a micropressure difference sensor is installed on one side of the fixing frame, one end of the micropressure difference sensor is connected with a pressure relief solenoid valve, an airtight head is installed at the bottom end of the fixing frame, and the top end of the airtight head is communicated with one end of the pressure relief solenoid valve; the self-checking mechanism comprises a mounting plate, a pressurizing air cylinder is fixedly mounted on one side of the mounting plate, an air outlet of the pressurizing air cylinder is connected with an air pipe, an airtight head contact plate is fixedly mounted at the top end of the mounting plate, a through hole is formed in the airtight head contact plate, and the other end of the air pipe is connected with the bottom end of the through hole in a sealing mode; the ventilation structure comprises a fixed platform, a hollow rotary platform is installed at the top end of the fixed platform, a screwing thread head used for sealing and connecting workpieces is installed at the top end of the hollow rotary platform, and one side of the hollow rotary platform is fixedly connected with the mounting plate through a connecting frame.

Further, the pressure relief solenoid valve is a two-position three-way solenoid valve.

Further, a slide rail is installed to one side of mount, one side slidable mounting of slide rail has the slide, minute-pressure difference sensor, pressure release solenoid valve and airtight head from top to bottom fixed mounting are in one side of slide in proper order, the upper and lower both ends of slide rail all are connected with the spacing seat that is used for restricting the slide, and are connected with the spring between spacing seat and the slide that are in the slide rail upper end.

Furthermore, the fixed frame is fixedly provided with a sensor which is in place at one side close to the spring, and one side of the top end of the sliding seat is fixedly provided with an induction sheet which is matched with the sensor which is in place.

Furthermore, a servo motor is fixedly installed at the bottom end of the fixed table and is in transmission connection with the hollow rotating platform.

Furthermore, the bottom end of the fixing table is connected with a high-pressure air pipe, an air hole is formed in the tightening screw head, and one end of the high-pressure air pipe is connected with one end of the air hole of the tightening screw head in a sealing mode.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model can conveniently connect the up-down moving module when in use through the fixing frame in the pressure difference detection mechanism, so as to realize the pressurized sealing detection of the workpiece, and can realize the rapid detection of the air tightness of the workpiece through the matching use of the micro-pressure difference sensor and the air tight head; meanwhile, through the arrangement of the sliding rail, the sliding seat, the spring, the in-place sensor and the induction sheet, the pressing displacement can be quickly detected, and the damage to a mechanism and a workpiece caused by overhigh force application is prevented;

the utility model discloses a setting of self-checking mechanism can realize before the gas tightness detects at every turn, carry out quick self-checking to the differential pressure sensor, so that the differential pressure sensor is in the timely discovery after the problem appears, the condition of avoiding the false retrieval takes place, through at the inside pressurization cylinder that sets up of self-checking mechanism, can be fixed with the help of the cylinder body volume of pressurization cylinder, can compress into the gaseous characteristic of equivalent volume at every turn, carry out quick detection to the differential pressure sensor, improve the reliability of differential pressure sensor, and then can improve holistic detection precision.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic perspective view of the differential pressure detecting mechanism of the present invention.

Fig. 3 is a schematic plan view of the differential pressure detecting mechanism of the present invention.

Fig. 4 is the utility model discloses self-checking mechanism schematic diagram.

Fig. 5 is a schematic view of the ventilation structure of the present invention.

Fig. 6 is a schematic view of the compression ventilation detection of the present invention.

Fig. 7 is a schematic diagram of the self-inspection of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a differential pressure detection mechanism; 101. a fixed mount; 102. a micro differential pressure sensor; 103. a pressure relief solenoid valve; 104. an airtight head; 105. a slide base; 106. a spring; 107. an in-place sensor; 108. a slide rail;

2. a self-checking mechanism; 201. mounting a plate; 202. an airtight head contact plate; 203. a pressurizing cylinder; 204. an air tube;

3. a venting structure; 301. a fixed table; 302. a hollow rotating platform; 303. screwing down the screw head;

4. a servo motor;

5. a high-pressure air pipe.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are provided to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment is as follows:

as shown in figures 1 to 7:

the utility model provides a gas microleakage detecting system, including differential pressure detection mechanism 1, self-checking mechanism 2 and ventilation structure 3, differential pressure detection mechanism 1 includes mount 101, differential pressure sensor 102 is installed to one side of mount 101, differential pressure sensor 102's one end is connected with pressure release solenoid valve 103, airtight head 104 is installed to the bottom of mount 101, and the top of airtight head 104 and the one end of pressure release solenoid valve 103 put through each other; the self-checking mechanism 2 comprises a mounting plate 201, a pressurizing cylinder 203 is fixedly mounted on one side of the mounting plate 201, an air outlet of the pressurizing cylinder 203 is connected with an air pipe 204, an airtight head contact plate 202 is fixedly mounted at the top end of the mounting plate 201, a through hole is formed in the airtight head contact plate 202, and the other end of the air pipe 204 is connected with the bottom end of the through hole in a sealing manner; the ventilation structure 3 comprises a fixed table 301, a hollow rotary platform 302 is installed at the top end of the fixed table 301, a screwing thread head 303 for hermetically connecting a workpiece is installed at the top end of the hollow rotary platform 302, and one side of the hollow rotary platform 302 is fixedly connected with the mounting plate 201 through a connecting frame.

Wherein, pressure release solenoid valve 103 is two three-way solenoid valve, when using, can open two three-way pressure release solenoid valve 103, makes pipeline internal seal environment communicate with atmospheric pressure, then compresses tightly behind the product surface when airtight head 104, and pressure release solenoid valve begins to close, and the disconnection begins to pressurize with the atmospheric pressure and detects, waits for the ventilation structure to begin to pressurize and detect.

Wherein, slide rail 108 is installed to one side of mount 101, one side slidable mounting of slide rail 108 has slide 105, micro differential pressure sensor 102, pressure release solenoid valve 103 and airtight head 104 from top to bottom in proper order fixed mounting is in one side of slide 105, the upper and lower both ends of slide rail 108 all are connected with the spacing seat that is used for restricting slide 105, and are connected with spring 106 between spacing seat and the slide 105 that are in the slide 108 upper end.

Wherein, mount 101 is close to spring 106 one side fixed mounting have the sensor 107 that targets in place, and slide 105 top one side fixed mounting have with the response piece of the sensor 107 adaptation that targets in place, through the design of above-mentioned structure, can realize when airtight head 104 presses on the product gas leakage surface, thereby beginning to detect gas leakage to the gas leakage part formation a sealed environment, simultaneously in order to guarantee the gas tightness, airtight head 104 need guarantee sufficient down force, so adopt spring 106 to add the structure of sensor 107 that targets in place, after the sensor 107 was sheltered from to the response piece, this differential micro pressure detection mechanism 1 can stop moving downwards.

Wherein, the bottom fixed mounting of fixed station 301 has servo motor 4, just servo motor 4 is connected with the transmission of cavity rotary platform 302, and through servo motor 4's installation use, can be convenient for when the installation work piece, the rotatory platform 302 of drive cavity drives screws up the screw thread head 303 and rotates, and then is convenient for the installation of faster efficiency and waits to detect the work piece.

Wherein, the bottom of fixed station 301 is connected with high-pressurepipe 5, the inside of screwing up thread head 303 is provided with the gas pocket, just the one end of high-pressurepipe 5 and the gas pocket one end sealing connection of screwing up thread head 303.

The working principle of the embodiment is as follows:

before the micro differential pressure detection mechanism is used, the fixing frame 101 in the micro differential pressure detection mechanism 1 can be externally connected with an up-and-down moving module which can be a mechanical arm in the prior art, the utility model is not limited, and then an electric element in the system is externally connected with a PLC control switch and an air source, so that the micro differential pressure detection mechanism can be put into use; when the device is used, firstly, a workpiece to be detected is connected with a screwing thread head 303 in the ventilation structure 3, then, the external up-down moving module is controlled by the PLC control switch to drive the pressure difference detection mechanism 1 to move to the top side of the self-detection mechanism 2, the airtight head 104 is in sealed contact with the airtight head contact plate 202, then, the pressure cylinder 203 is started by the PLC control switch, if the numerical value result detected by the micro-pressure difference sensor 102 is consistent with the numerical value of gas discharged by the pressure cylinder 203, and the up-down floating does not exceed 1%, the micro-pressure difference sensor is proved to work normally, and then, the workpiece can be subjected to airtightness detection; the working process of the micro differential pressure detection mechanism 1 is as follows: it drives this part structure to the position that will detect the product to reciprocate the module, open two tee bend pressure release solenoid valve 103, make its inside sealed environment and atmospheric pressure communicate, then compress tightly behind the product surface when airtight head 104, pressure release solenoid valve 103 begins to close, the disconnection is with the intercommunication of atmospheric pressure, wait that ventilation structure 3 begins to pressurize and detect, when beginning to detect, if leak, the micro pressure sensor will have the rise of numerical value, if the differential pressure sensor maximum pressure who chooses for use in this structure is 1000Pa, if PLC control switch reads pressure and reaches when 800Pa, this structure can open pressure release solenoid valve automatically in order to protect the micro pressure difference sensor not damaged.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a gaseous microleakage detecting system, includes differential pressure detection mechanism (1), self-checking mechanism (2) and ventilation structure (3), its characterized in that:

the micro-pressure difference detection mechanism (1) comprises a fixing frame (101), a micro-pressure difference sensor (102) is installed on one side of the fixing frame (101), one end of the micro-pressure difference sensor (102) is connected with a pressure relief electromagnetic valve (103), an airtight head (104) is installed at the bottom end of the fixing frame (101), and the top end of the airtight head (104) is communicated with one end of the pressure relief electromagnetic valve (103);

the self-checking mechanism (2) comprises a mounting plate (201), a pressurizing cylinder (203) is fixedly mounted on one side of the mounting plate (201), an air outlet of the pressurizing cylinder (203) is connected with an air pipe (204), an airtight head contact plate (202) is fixedly mounted at the top end of the mounting plate (201), a through hole is formed in the airtight head contact plate (202), and the other end of the air pipe (204) is connected with the bottom end of the through hole in a sealing mode;

the ventilation structure (3) comprises a fixing platform (301), a hollow rotating platform (302) is installed at the top end of the fixing platform (301), a screwing thread head (303) used for sealing connection of workpieces is installed at the top end of the hollow rotating platform (302), and one side of the hollow rotating platform (302) is fixedly connected with the mounting plate (201) through a connecting frame.

2. The gas microleakage detection system of claim 1, wherein: the pressure relief solenoid valve (103) is a two-position three-way solenoid valve.

3. The gas microleakage detection system of claim 1, wherein: slide rail (108) are installed to one side of mount (101), one side slidable mounting of slide rail (108) has slide (105), minute-pressure difference sensor (102), pressure release solenoid valve (103) and air-tight head (104) from top to bottom in proper order fixed mounting in one side of slide (105), the upper and lower both ends of slide rail (108) all are connected with the spacing seat that is used for restricting slide (105), and are connected with spring (106) between spacing seat and slide (105) that are in slide rail (108) upper end.

4. The gas microleakage detection system of claim 3, wherein: the fixed frame (101) is fixedly provided with a sensor (107) which is in place at one side close to the spring (106), and one side of the top end of the sliding seat (105) is fixedly provided with a sensing sheet matched with the sensor (107) which is in place.

5. The gas microleakage detection system of claim 1, wherein: the bottom end of the fixed platform (301) is fixedly provided with a servo motor (4), and the servo motor (4) is in transmission connection with the hollow rotating platform (302).

6. The gas microleakage detection system of claim 1, wherein: the bottom of fixed station (301) is connected with high-pressurepipe (5), the inside of screwing up screw thread head (303) is provided with the gas pocket, just the one end of high-pressurepipe (5) and the gas pocket one end sealing connection of screwing up screw thread head (303).