CN114061849A

CN114061849A - Rotary type sealing performance testing device and method and machining method

Info

Publication number: CN114061849A
Application number: CN202010747129.4A
Authority: CN
Inventors: 姜德志; 李波
Original assignee: Upton Automation Systems Guangzhou Co ltd
Current assignee: Upton Automation Systems Guangzhou Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2022-02-18

Abstract

The invention discloses a rotary type tightness testing device, a rotary type tightness testing method and a processing method, wherein the rotary type tightness testing device comprises at least one air tightness testing structure, and the air tightness testing structure comprises a main shell, a rotating body and a testing clamp; the main shell is internally provided with an accommodating chamber, and is provided with an air inlet/exhaust channel and a test channel which are respectively communicated with the accommodating chamber; the rotating body is arranged in the accommodating cavity and can rotate relative to the main shell; the rotating body is internally provided with a gas path channel, and the two ends of the gas path channel are provided with a first connecting port and a second connecting port which are respectively communicated with the accommodating cavity; the test fixture comprises a test fixture body, a test cavity is arranged on the test fixture body, and the test cavity is communicated with the test channel; also included is a sealing structure. The invention has the characteristics of simple structure, convenient processing and assembly and good test precision, is easy to be processed into a test gas circuit structure of an ultra-small inner cavity, and meets the air tightness test requirement and batch application of ultra-small sealing products.

Description

Rotary type sealing performance testing device and method and machining method

Technical Field

The invention relates to an air tightness test structure, in particular to a rotary type tightness test device, a rotary type tightness test method and a rotary type tightness test processing method which are suitable for ultra-small sealing products.

Background

Due to the miniaturization of electronic components, such as crystal oscillators and chips, the volume of products is smaller and smaller, and the sensitivity and precision of the test are improved by a smaller test internal volume, so that an ideal test effect is achieved. In the prior art, the chinese patent with application number 201910334704.5 discloses a differential pressure type air tightness tester and a test method, wherein the differential pressure type air tightness tester comprises an air source interface, an air charging/sucking valve, an air discharging valve, a first pressure retaining valve, a second pressure retaining valve, a differential pressure sensor, a first pressure dividing valve, a second pressure dividing valve, a tested object interface, a reference object interface, a first pressure dividing tank and a second pressure dividing tank; the air source interface is connected with the air charging/sucking valve, and the air outlet end of the air charging/sucking valve is respectively connected with the first pressure retaining valve, the second pressure retaining valve and the air release valve; the first pressure retaining valve is connected with an interface of a measured object; the second pressure retaining valve is connected with the reference object interface; one end of the differential pressure sensor is connected between the first pressure retaining valve and the interface of the measured object, and the other end of the differential pressure sensor is connected between the second pressure retaining valve and the interface of the reference object; one end of the first pressure dividing valve is connected between the first pressure maintaining valve and the interface of the measured object, and the other end of the first pressure dividing valve is connected with the first pressure dividing tank; one end of the second partial pressure valve is connected between the second pressure retaining valve and the reference object interface, and the other end of the second partial pressure valve is connected with the second partial pressure tank. The testing gas circuit with the structure has the defects of complex structure, difficult processing, difficult assembly and large volume of the content cavity, so that the cost is high, the efficiency is low, and higher testing requirements and batch application are difficult to meet.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a rotary type tightness testing device which is used for testing small leakage of a sealed product or simultaneously testing small leakage and large leakage and has the characteristics of simple structure, convenience in processing and assembling and good testing precision; furthermore, the test gas circuit structure is particularly easy to process into a test gas circuit structure with an ultra-small inner cavity, and the requirements of gas tightness test and batch application of ultra-small sealing products are met.

The second purpose of the invention is to provide a testing method of the rotary type tightness testing device, which has the characteristics of good testing precision, convenient operation, high working efficiency and low labor cost.

The invention also aims to provide a processing method of the rotary type tightness testing device, which has the characteristics of convenience in processing and simplicity in assembly and solves the processing problems of an accommodating chamber, an air passage and a sealing groove in a shell and the assembly problems of a sealing element.

One of the purposes of the invention is realized by adopting the following technical scheme:

the rotary type tightness testing device is characterized by comprising at least one air tightness testing structure, wherein the air tightness testing structure comprises a main shell, a rotating body and a testing clamp;

an accommodating chamber is arranged in the main shell, and an air inlet/exhaust channel and a test channel which are respectively communicated with the accommodating chamber are arranged on the main shell;

the rotating body is arranged in the accommodating cavity and can rotate relative to the main shell; the rotating body is internally provided with an air channel, and two ends of the air channel are provided with a first connecting port and a second connecting port which are respectively communicated with the accommodating cavity;

the test fixture comprises a test fixture body, a test cavity is arranged on the test fixture body, and the test cavity is communicated with the test channel;

the device also comprises a sealing structure;

during the rotation of the rotating body in the counterclockwise or clockwise direction with respect to the main casing, the airtightness testing structure simultaneously satisfies the following conditions:

the first condition is as follows: the first connecting port of the air path channel is in butt-joint communication with the air inlet/outlet channel, the joint between the first connecting port and the air inlet/outlet channel is sealed by the sealing structure, the second connecting port of the air path channel is in butt-joint communication with the testing channel, and the joint between the second connecting port and the testing channel is sealed by the sealing structure, so that the air inlet/outlet channel, the air path channel, the testing channel and the testing cavity are sequentially communicated to form a sealed air charging/sucking channel;

and a second condition: the first connecting port of the air channel is disconnected with the air inlet/exhaust channel in a staggered manner, the second connecting port of the air channel is disconnected with the test channel in a staggered manner, and the test channels are all closed, so that the test channels are communicated with the test cavity to form a sealed small-leakage test channel.

In an alternative embodiment, the sealing structure comprises first sealing rings respectively arranged at the openings of the air inlet/outlet channel, the testing channel and the testing cavity, which are adjacent to one side of the accommodating chamber;

in the alternative, the first and second sets of the first and second sets of the first and second sets of the first and second sets of the first and second sets of the first and second sets of the second,

the sealing structure comprises a sealing sleeve and a second sealing ring which are sleeved on the periphery of the rotating body, a first through hole and a second through hole are formed in the side wall of the sealing sleeve, the first through hole is communicated with a first connecting port of the air channel, and the second through hole is communicated with a second connecting port of the air channel; and the opening of the testing cavity, which is close to one side of the containing cavity, is provided with the second sealing ring.

In an optional embodiment, the pressure-dividing device further comprises a pressure-dividing structure, and a pressure-dividing channel communicated with the accommodating chamber is further arranged on the main shell; the pressure dividing structure comprises a pressure dividing structure body, a pressure dividing cavity is arranged on the pressure dividing structure body, and the pressure dividing cavity is communicated with the pressure dividing channel;

during the rotation of the rotating body in the counterclockwise or clockwise direction with respect to the main casing, the air tightness test structure simultaneously satisfies the following conditions:

and (3) carrying out a third condition: the first connecting port of the gas path channel is communicated with the testing channel in a butt joint mode, the connecting position between the first connecting port and the testing channel is sealed through the sealing structure, the second connecting port of the gas path channel is communicated with the partial pressure channel in a butt joint mode, and the connecting position between the second connecting port and the partial pressure channel is sealed through the sealing structure, so that the testing cavity, the testing channel, the gas path channel, the partial pressure channel and the partial pressure cavity are sequentially communicated to form a sealed large-leakage testing channel.

In an alternative embodiment, the sealing structure comprises first sealing rings respectively arranged at openings of the air inlet/outlet channel, the testing channel, the partial pressure channel, the testing cavity and the partial pressure cavity, which are adjacent to one side of the accommodating cavity;

the sealing structure comprises a sealing sleeve and a second sealing ring which are sleeved on the periphery of the rotating body, a first through hole and a second through hole are formed in the side wall of the sealing sleeve, the first through hole is communicated with a first connecting port of the air channel, and the second through hole is communicated with a second connecting port of the air channel; the opening parts of the test cavity and the pressure division cavity, which are adjacent to one side of the containing cavity, are provided with the second sealing rings.

In an optional embodiment, the main housing is further provided with a partial pressure exhaust channel communicated with the accommodating chamber; during the rotation of the rotating body in the counterclockwise or clockwise direction with respect to the main casing, the air tightness test structure simultaneously satisfies the following conditions:

and a fourth condition: the first connecting port of the gas path channel is in butt joint communication with the partial pressure channel, the connecting position between the first connecting port and the partial pressure channel is sealed through the sealing structure, the second connecting port of the gas path channel is in butt joint communication with the partial pressure exhaust channel, and the connecting position between the second connecting port and the partial pressure exhaust channel is sealed through the sealing structure, so that the partial pressure cavity, the partial pressure channel, the gas path channel and the partial pressure exhaust channel are sequentially communicated to form the sealed partial pressure exhaust channel.

In an optional embodiment, the sealing structure comprises a first sealing ring respectively arranged at the opening of the air inlet/outlet channel, the testing channel, the partial pressure channel, the testing cavity, the partial pressure cavity and the partial pressure and air outlet channel adjacent to one side of the accommodating cavity;

In an alternative embodiment, the rotating body further includes a rotating shaft extending axially outward from a center of the rotating body; still be equipped with actuating mechanism on the main casing body, actuating mechanism's output shaft with pivot fixed connection is rotatory by actuating mechanism drive pivot, drives the rotator by the pivot again along clockwise or anticlockwise rotation.

In an alternative embodiment, a pressure sensor for detecting the air pressure in the test chamber is further included.

In an optional embodiment, the air tightness test structure comprises more than two groups of air path structures, and each air path structure consists of an air inlet/exhaust channel, a test channel, an air path channel and a test cavity;

the air tightness test structure meets any one of the following test modes:

the first test mode is as follows: each two groups of the gas circuit structures are used in parallel, wherein one group of the gas circuit structures are used for testing a to-be-tested sealing product, the other group of the gas circuit structures are used for testing a standard sealing product, and the two groups of the gas circuit structures are both provided with pressure sensors for detecting the air pressure in a small-leakage testing channel to form a differential pressure comparison gas circuit;

and a second test mode: in all the gas circuit structures, one group of gas circuit structures are used for testing the standard sealing products, and the rest gas circuit structures are respectively used for testing the sealing products to be tested; each group of gas circuit structures is provided with a pressure sensor for detecting the air pressure in the small-leakage test channel;

and a third test mode: all the gas circuit structures are respectively used for testing the to-be-tested sealing product; each group of gas circuit structures is provided with a pressure sensor for detecting the air pressure in the small-leakage test channel;

the air tightness test structure comprises a group of air path structures, and each air path structure consists of an air inlet/exhaust channel, a test channel, an air path channel and a test cavity; the number of the air tightness test structures is more than two;

the air tightness test structure meets any one of the following test modes:

the first test mode is as follows: each two air tightness test structures are used in parallel, wherein one air tightness test structure is used for testing a to-be-tested sealing product, the other air tightness test structure is used for testing a standard sealing product, and the air path structures of the two air tightness test structures are both provided with pressure sensors for detecting air pressure in a small-leakage test channel to form a pressure difference comparison air path;

and a second test mode: one air tightness test structure is used for testing the standard sealing product, and the rest air tightness test structures are respectively used for testing the sealing product to be tested; each air tightness test structure is provided with a pressure sensor for detecting the air pressure in the small leakage test channel;

and a third test mode: all the air tightness test structures are respectively used for testing the to-be-tested sealing product; and a pressure sensor for detecting air pressure in the small-leakage test channel is arranged in the air path structure of each air tightness test structure.

In an optional embodiment, the air tightness test structure comprises more than two groups of air path structures, and each air path structure consists of an air inlet/exhaust channel, a test channel, a pressure dividing channel, an air path channel, a test cavity and a pressure dividing cavity;

the air tightness test structure meets any one of the following test modes:

the first test mode is as follows: each two groups of the gas path structures are used in parallel, wherein one group of the gas path structures are used for testing a to-be-tested sealing product, the other group of the gas path structures are used for testing a standard sealing product, and the two groups of the gas path structures are provided with pressure sensors for detecting the air pressure in the small-leakage testing channel and the large-leakage testing channel to form a pressure difference comparison gas path;

and a second test mode: in all the gas circuit structures, one group of gas circuit structures are used for testing the standard sealing products, and the rest gas circuit structures are respectively used for testing the sealing products to be tested; pressure sensors for detecting air pressure in the small-leakage test channel and the large-leakage test channel are arranged in each group of air path structures;

and a third test mode: all the gas circuit structures are respectively used for testing the to-be-tested sealing product; pressure sensors for detecting air pressure in the small-leakage test channel and the large-leakage test channel are arranged in each group of air path structures;

the air tightness test structure comprises a group of air path structures, and each air path structure consists of an air inlet/exhaust channel, a test channel, a pressure dividing channel, an air path channel, a test cavity and a pressure dividing cavity; the number of the air tightness test structures is more than two;

the air tightness test structure meets any one of the following test modes:

the first test mode is as follows: each two air tightness test structures are used in parallel, wherein one air tightness test structure is used for testing a to-be-tested sealing product, the other air tightness test structure is used for testing a standard sealing product, and the air path structures of the two air tightness test structures are both provided with pressure sensors for detecting air pressure in a small leakage test channel and a large leakage test channel to form a pressure difference comparison air path;

and a second test mode: one air tightness test structure is used for testing the standard sealing product, and the rest air tightness test structures are respectively used for testing the sealing product to be tested; each air tightness test structure is provided with a pressure sensor for detecting air pressure in the small-leakage test channel and the large-leakage test channel;

and a third test mode: all the air tightness test structures are respectively used for testing the to-be-tested sealing product; and pressure sensors for detecting air pressure in the small-leakage test channel and the large-leakage test channel are arranged in the air path structures of the air tightness test structures.

In an optional embodiment, the air tightness test structure comprises more than two groups of air path structures, and each air path structure consists of an air inlet/outlet channel, a test channel, a pressure dividing and air outlet channel, an air path channel, a test cavity and a pressure dividing cavity;

the air tightness test structure meets any one of the following test modes:

the air tightness test structure comprises a group of air path structures, and each air path structure consists of an air inlet/outlet channel, a test channel, a pressure dividing and air outlet channel, an air path channel, a test cavity and a pressure dividing cavity; the number of the air tightness test structures is more than two;

the air tightness test structure meets any one of the following test modes:

In an alternative embodiment, a differential pressure sensor is further disposed between each two sets of pressure sensors of the air path structure.

In an optional embodiment, the device further comprises an air source device connected with the air inlet/outlet channel; the air source device is a vacuum pumping device or an air charging/sucking pressurizing device.

In an optional embodiment, the device further comprises a constant volume type pressure generating device connected with the air inlet/outlet channel.

In an alternative embodiment, the main housing is a split structure, and includes more than two sub-housings, and the sub-housings are fixedly connected with each other in a detachable connection manner.

In an alternative embodiment, the receiving chamber is circular in shape, and the rotating body is circular in shape.

In an alternative embodiment, two channels with an included angle F and a depth equal to the radius of the inner rotating shaft body are machined on the same radial plane of the rotating body in the radial direction, and the two channels penetrate through the shaft center to form the air passage channel.

In an alternative embodiment, the air inlet/outlet channel, the test channel, the partial pressure exhaust channel and the air passage channel are located on the same vertical plane; an included angle a is formed between the air inlet/outlet channel and the test channel, an included angle b is formed between the test channel and the partial pressure channel, and an included angle c is formed between the partial pressure channel and the partial pressure outlet channel, wherein 0 degree < a <120 degrees, and a ═ b ═ c ═ F.

In an optional embodiment, the air path channel is L-shaped, the air path channel includes a first channel and a second channel, a joint of the first channel and the second channel is located at a center of the rotating body, an included angle d is formed between the first channel and the second channel of the air path channel, an included angle e is formed between the partial pressure exhaust channel and the air inlet/exhaust channel, and e is equal to d, b, c, and F, and 90 °.

The second purpose of the invention is realized by adopting the following technical scheme:

a testing method of a rotary type tightness testing device is characterized by comprising the following steps:

1) testing a single sealing product:

1-1) preparation steps: placing the to-be-tested sealing product into a testing cavity, and connecting an air source device with an air inlet/outlet channel;

1-2) a charging/sucking step; the rotating body or the main shell is driven to rotate counterclockwise or clockwise by a preset angle, so that a first connecting port of the air channel is in butt joint communication with the air inlet/outlet channel, a second connecting port of the air channel is in butt joint communication with the testing channel, and the air inlet/outlet channel, the air channel, the testing channel and the testing cavity are sequentially communicated to form a sealed air charging/sucking channel; pressurizing or vacuumizing the to-be-detected sealing product, recording the pressure value as P1 after a preset time or reaching a preset pressure, and stopping pressurizing or vacuumizing;

1-3) a small leakage test step; continuously driving the rotating body or the main shell to rotate in the same direction by a preset angle, wherein the first connecting port of the air channel is disconnected with the air inlet/outlet channel in a staggered manner, the second connecting port of the air channel is disconnected with the testing channel in a staggered manner, and the testing channel is closed, so that the testing channel is communicated with the testing cavity to form a sealed small-leakage testing channel; after the preset pressure maintaining time, detecting a pressure value in the test cavity, and recording the pressure value as P2; comparing the pressure difference between the P2 and the P1, and if the pressure difference exceeds a specified range, judging that the to-be-detected sealing product is a small-leakage unqualified product; and if the pressure difference value is within the specified range, judging that the sealed product to be detected is a small-leakage qualified product.

In an alternative embodiment of the method according to the invention,

in the single sealing product testing step, after finishing the large leakage testing step, still include:

1-5) partial pressure exhaust step: the rotating body is continuously driven to rotate in the same direction for a preset angle, so that the first connecting port of the air channel is in butt joint communication with the pressure dividing channel, the connecting position between the first connecting port and the pressure dividing channel is sealed through the sealing structure, the second connecting port of the air channel is in butt joint communication with the pressure dividing exhaust channel, and the connecting position between the second connecting port and the pressure dividing exhaust channel is sealed through the sealing structure, and the pressure dividing cavity, the pressure dividing channel, the air channel and the pressure dividing exhaust channel are sequentially communicated to form a sealed pressure dividing exhaust channel; the gas in the partial pressure cavity is discharged through the gas channel and the partial pressure exhaust channel;

1-6) an air exhausting step: the driving rotating body continues to rotate in the same direction for a preset angle and returns to an initial state, and the gas in the test cavity is discharged through the gas path channel and the gas inlet/outlet channel, so that a test cycle is completed.

and (3) a double-seal product comparison test step:

a device preparation step: respectively placing the to-be-tested sealing product and the standard sealing product into test cavities of two groups of gas circuit structures, and connecting a gas source device with a gas inlet/outlet channel; the same testing steps are adopted for the sealing product to be tested and the standard sealing product;

a charging/sucking step; the rotating body or the main shell is driven to rotate counterclockwise or clockwise by a preset angle, so that a first connecting port of the air channel is in butt joint communication with the air inlet/outlet channel, a second connecting port of the air channel is in butt joint communication with the testing channel, and the air inlet/outlet channel, the air channel, the testing channel and the testing cavity are sequentially communicated to form a sealed air charging/sucking channel; respectively pressurizing/vacuumizing the to-be-measured sealing product and the standard sealing product, and stopping pressurizing/vacuumizing after a preset time or when a preset pressure is reached;

testing small leakage; continuously driving the rotating body or the main shell to rotate in the same direction by a preset angle, wherein the first connecting port of the air channel is disconnected with the air inlet/exhaust channel in a staggered manner, the second connecting port of the air channel is disconnected with the testing channel in a staggered manner, and the testing channel is closed, so that the testing channel is communicated with the testing cavity to form a sealed small-leakage testing channel; after the preset pressure maintaining time, comparing the pressure difference values in the two test cavities, and if the pressure difference value exceeds a specified range, judging that the to-be-tested sealing product is a small-leakage unqualified product; and if the pressure difference value is within the specified range, judging that the sealed product to be detected is a small-leakage qualified product.

In an optional embodiment, after the step of performing a small leak test is completed, the method further includes:

a large leakage test step: the rotating body is continuously driven to rotate in the same direction for a preset angle, so that the first connecting port of the air channel is in butt joint communication with the testing channel, the joint between the first connecting port and the testing channel is sealed through the sealing structure, the second connecting port of the air channel is in butt joint communication with the pressure dividing channel, and the joint between the second connecting port and the pressure dividing channel is sealed through the sealing structure, so that the testing cavity, the testing channel, the air channel, the pressure dividing channel and the pressure dividing cavity are sequentially communicated to form a sealed large-leakage testing channel; injecting gas in the test chambers into the partial pressure chambers, comparing the pressure difference values in the two test chambers after a preset test time, if the pressure difference value exceeds a specified range, judging that the to-be-tested sealing product is a large-leakage unqualified product, and entering an exhaust link; and if the pressure difference value is within the specified range, judging that the to-be-detected sealing product is a large-leakage qualified product.

In an optional embodiment, after the step of performing a large leak test is completed, the method further includes:

partial pressure exhaust step: the rotating body is continuously driven to rotate in the same direction for a preset angle, so that the first connecting port of the air channel is in butt joint communication with the pressure dividing channel, the connecting position between the first connecting port and the pressure dividing channel is sealed through the sealing structure, the second connecting port of the air channel is in butt joint communication with the pressure dividing exhaust channel, and the connecting position between the second connecting port and the pressure dividing exhaust channel is sealed through the sealing structure, and the pressure dividing cavity, the pressure dividing channel, the air channel and the pressure dividing exhaust channel are sequentially communicated to form a sealed pressure dividing exhaust channel; the gas in each partial pressure cavity is discharged through the gas channel and the partial pressure exhaust channel;

and (3) exhausting: the driving rotating body continues to rotate in the same direction for a preset angle and returns to an initial state, and the gas in each test cavity is discharged through the gas path channel and the gas inlet/outlet channel, so that one test cycle is completed.

In an optional implementation manner, a differential pressure sensor is further disposed between the two sets of pressure sensors of the gas path structure, and a pressure difference value between the two test chambers is obtained through detection of the differential pressure sensor.

1) testing a constant-volume inflatable single sealing product:

1-1) preparation steps: placing the standard sealing product into a testing cavity, and connecting the constant volume type pressure generating device with the air inlet/outlet channel;

1-2) a large leakage test step; the rotating body or the main shell is driven to rotate counterclockwise or clockwise by a preset angle, so that a first connecting port of the air channel is in butt joint communication with the air inlet/outlet channel, a second connecting port of the air channel is in butt joint communication with the testing channel, and the air inlet/outlet channel, the air channel, the testing channel and the testing cavity are sequentially communicated to form a sealed air charging/sucking channel; after the piston of the constant volume type pressure generating device is pushed to a preset position, stopping pushing the piston of the constant volume type pressure generating device; detecting a pressure value in the test cavity, recording the pressure value as P21, and if the pressure value exceeds a specified range, judging that the to-be-tested sealing product is a large-leakage unqualified product; and if the pressure value is within the specified range, judging that the to-be-detected sealing product is a large-leakage qualified product.

1-3) small leakage testing: continuously driving the rotating body or the main shell to rotate in the same direction by a preset angle, wherein the first connecting port of the air channel is disconnected with the air inlet/outlet channel in a staggered manner, the second connecting port of the air channel is disconnected with the testing channel in a staggered manner, and the testing channel is closed, so that the testing channel is communicated with the testing cavity to form a sealed small-leakage testing channel; after the preset pressure maintaining time, detecting a pressure value in the test cavity, and recording the pressure value as P22; comparing the pressure difference between the P22 and the P21, and if the pressure difference exceeds a specified range, judging that the to-be-detected sealing product is a small-leakage unqualified product; if the pressure difference value is within the specified range, judging that the sealed product to be detected is a small-leakage qualified product;

1-4) an air exhausting step: the driving rotating body continues to rotate in the reverse direction by a preset angle and returns to the initial state, and the gas in each test cavity is exhausted through the gas path channel and the gas inlet/exhaust channel, so that one test cycle is completed.

the comparison test step of the constant volume inflatable double-seal product comprises the following steps:

the preparation method comprises the following steps: respectively placing a to-be-tested sealing product and a standard sealing product into test cavities of the two groups of gas circuit structures, and respectively connecting the two constant volume type pressure generating devices with the gas inlet/exhaust channels of the two groups of gas circuit structures; the same testing steps are adopted for the sealing product to be tested and the standard sealing product;

a large leakage test step: the rotating body or the main shell is driven to rotate counterclockwise or clockwise by a preset angle, so that a first connecting port of the air channel is in butt joint communication with the air inlet/outlet channel, a second connecting port of the air channel is in butt joint communication with the testing channel, and the air inlet/outlet channel, the air channel, the testing channel and the testing cavity are sequentially communicated to form a sealed air charging/sucking channel; after the pistons of the two constant volume type pressure generating devices are respectively pushed to the same preset positions, stopping pushing the pistons of the constant volume type pressure generating devices; comparing the pressure difference values in the two test cavities, and if the pressure difference value exceeds a specified range, judging that the to-be-tested sealing product is a large-leakage unqualified product; if the pressure difference value is within the specified range, judging that the to-be-detected sealing product is a large-leakage qualified product;

a small leakage testing step: continuously driving the rotating body or the main shell to rotate in the same direction by a preset angle, wherein the first connecting port of the air channel is disconnected with the air inlet/outlet channel in a staggered manner, the second connecting port of the air channel is disconnected with the testing channel in a staggered manner, and the testing channel is closed, so that the testing channel is communicated with the testing cavity to form a sealed small-leakage testing channel; after the preset pressure maintaining time, respectively detecting the pressure values in the two test cavities, comparing the pressure difference values in the two test cavities, and if the pressure difference value exceeds a specified range, judging that the to-be-tested sealing product is a small-leakage unqualified product; and if the pressure difference value is within the specified range, judging that the sealed product to be detected is a small-leakage qualified product.

And (3) exhausting: the driving rotating body continues to rotate in the reverse direction by a preset angle and returns to the initial state, and the gas in each test cavity is exhausted through the gas path channel and the gas inlet/exhaust channel, so that one test cycle is completed.

The third purpose of the invention is realized by adopting the following technical scheme:

a processing method of a rotary type tightness testing device is characterized by comprising the following steps:

a main shell processing step: providing a main shell base body, and processing an accommodating chamber on the main shell base body; then cutting the main shell body at a position corresponding to the accommodating cavity, and dividing the main shell body into more than two sub-shells; processing an air inlet/exhaust channel and a test channel on the sub-shell, and respectively processing an annular first sealing groove at the openings of the air inlet/exhaust channel and the test channel, which are close to one side of the accommodating chamber;

a rotating body processing step: providing a rotating body base body, and processing an air path channel with a first connecting port and a second connecting port at two ends in the rotating body base body to obtain a rotating body;

processing a test fixture: providing a test fixture body, processing a test cavity with an opening at the top of the test fixture body, and processing an annular first seal groove at the opening at the top of the test cavity to obtain a test fixture;

assembling: install a first sealing washer in the first seal groove of advancing/exhaust passageway, test channel, test chamber respectively, then assemble the branch casing more than two with the mode that can dismantle fixed connection and form the main casing body, install the rotator in the chamber that holds of the main casing body, align the test chamber of test fixture and the test channel of the main casing body, can have sufficient space when two separate and put into the product that awaits measuring to the test chamber, can realize that test chamber and test channel are sealed to be switched on when both paste tightly.

a main shell processing step: providing a main shell base body, and processing an accommodating chamber on the main shell base body; then cutting the main shell body at a position corresponding to the accommodating cavity, and dividing the main shell body into more than two sub-shells; processing an air inlet/outlet channel, a test channel and a partial pressure channel on the sub-shell, and respectively processing an annular first sealing groove at the opening of one side of the air inlet/outlet channel, the test channel and the partial pressure channel, which is adjacent to the containing chamber;

a partial pressure structure processing step: providing a partial pressure structure body, processing a partial pressure cavity with an opening on the side wall of the partial pressure structure body, and processing an annular first sealing groove at the opening of the partial pressure cavity to obtain a partial pressure structure;

assembling: at advance/exhaust passageway, the test channel, the test chamber, the partial pressure passageway, install a first sealing washer in the first seal groove in the partial pressure chamber respectively, install the rotator in the chamber that holds of main casing body, align the test chamber of test fixture and the test channel of the main casing body, can have sufficient space to put into the product to be tested to the test chamber when both separate, can realize when both paste tightly that test chamber and test channel are sealed to switch on, the partial pressure chamber with the partial pressure passageway of partial pressure structure is sealed to switch on.

a main shell processing step: providing a main shell base body, and processing an accommodating chamber on the main shell base body; then cutting the main shell body at a position corresponding to the accommodating cavity, and dividing the main shell body into more than two sub-shells; processing an air inlet/outlet channel, a test channel, a partial pressure channel and a partial pressure exhaust channel on the sub-shell, and respectively processing an annular first sealing groove at the opening of the air inlet/outlet channel, the test channel, the partial pressure channel and the partial pressure exhaust channel, which is close to one side of the accommodating chamber;

assembling: at advance/exhaust passageway, the test channel, the test chamber, the partial pressure passageway, the partial pressure chamber, install a first sealing washer in the first seal groove of partial pressure exhaust passageway respectively, install the rotator in the chamber that holds of main casing body, align the test chamber of test fixture and the test channel of the main casing body, can have sufficient space to put into the product to be tested to the test chamber when both separate, can realize when both paste tightly that test chamber and test channel are sealed to switch on, the partial pressure chamber and the partial pressure passageway of partial pressure structure are sealed to switch on.

a main shell processing step: providing a main shell base body, and processing an accommodating chamber on the main shell base body; then cutting the main shell body at a position corresponding to the accommodating cavity, and dividing the main shell body into more than two sub-shells; processing an air inlet/exhaust channel and a test channel on the sub-shell;

processing a test fixture: providing a test fixture body, processing a test cavity with an opening at the top of the test fixture body, and processing an annular second seal groove at the opening at the top of the test cavity to obtain a test fixture;

assembling: a sealing sleeve is arranged on the periphery of the rotating body, a second sealing ring is arranged in a second sealing groove of the test fixture, the rotating body is arranged in an accommodating cavity of the main shell, a test cavity of the test fixture is aligned with a test channel of the main shell, when the two are separated, enough space is provided for placing a product to be tested into the test cavity, and when the two are attached tightly, the test cavity and the test channel can be in sealed conduction; .

a main shell processing step: providing a main shell base body, and processing an accommodating chamber on the main shell base body; then cutting the main shell body at a position corresponding to the accommodating cavity, and dividing the main shell body into more than two sub-shells; processing an air inlet/exhaust channel, a test channel and a partial pressure channel on the sub-shell;

a partial pressure structure processing step: providing a partial pressure structure body, processing a partial pressure cavity with an opening on the side wall of the partial pressure structure body, and processing an annular second sealing groove at the opening of the partial pressure cavity to obtain a partial pressure structure;

assembling: a sealing sleeve is arranged on the periphery of the rotating body, a second sealing ring is respectively arranged in a second sealing groove of the test fixture and the partial pressure structure, the rotating body is arranged in an accommodating cavity of the main shell, a test cavity of the test fixture is aligned with a test channel of the main shell, when the test fixture and the main shell are separated, enough space is provided for placing a product to be tested into the test cavity, and when the test fixture and the main shell are tightly attached, the test cavity and the test channel can be hermetically communicated; and the pressure dividing cavity of the pressure dividing structure is communicated with the pressure dividing channel in a sealing way.

a main shell processing step: providing a main shell base body, and processing an accommodating chamber on the main shell base body; then cutting the main shell body at a position corresponding to the accommodating cavity, and dividing the main shell body into more than two sub-shells; processing an air inlet/outlet channel, a test channel, a partial pressure channel and a partial pressure exhaust channel on the sub-shell;

assembling: seal cover of periphery installation at the rotator, at test fixture, install a second sealing washer in the second seal groove of partial pressure structure respectively, install the rotator in the chamber that holds of the main casing body, align the test cavity of test fixture with the test channel of the main casing body, can have sufficient space to put into the product to be tested to the test cavity when both parts are separately, both can realize when pasting tightly that test cavity and test channel are sealed to switch on, the partial pressure chamber and the partial pressure channel of partial pressure structure are sealed to switch on.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention comprises a main shell, a rotating body, a test fixture and a sealing structure; during the rotation of the rotating body in the counterclockwise or clockwise direction with respect to the main casing, the airtightness testing structure simultaneously satisfies the following conditions: the first condition is as follows: the first connecting port of the air path channel is in butt-joint communication with the air inlet/outlet channel, the joint between the first connecting port and the air inlet/outlet channel is sealed by the sealing structure, the second connecting port of the air path channel is in butt-joint communication with the testing channel, and the joint between the second connecting port and the testing channel is sealed by the sealing structure, so that the air inlet/outlet channel, the air path channel, the testing channel and the testing cavity are sequentially communicated to form a sealed air charging/sucking channel; and a second condition: the first connecting port of the air channel is disconnected with the air inlet/exhaust channel in a staggered manner, the second connecting port of the air channel is disconnected with the test channel in a staggered manner, and the test channels are all closed, so that the test channel is communicated with the test cavity to form a sealed small-leakage test channel; the device is used for carrying out the small leakage test to the sealed article, adopts the rotator to realize the switching between each passageway, need not set up solenoid valve and relevant pipe fitting accessory on too much valve pipeline formula test circuit, has simple structure, processing and convenient assembling, the measuring accuracy is good and convenient operation's advantage. The traditional valve pipeline type test loop cannot achieve ultra-small volume of a chip test level, and the device is easy to process into a test gas circuit structure of an ultra-small inner cavity, so that the air tightness test requirements and batch application of ultra-small sealing products (such as chips, crystal oscillators and the like) are met.

2. The invention also comprises a pressure dividing structure, and a pressure dividing channel communicated with the accommodating chamber is also arranged on the main shell; during the rotation of the rotating body in the counterclockwise direction or the clockwise direction relative to the main casing, the air tightness test structure satisfies the following conditions while satisfying the first condition and the second condition: and (3) carrying out a third condition: the first connecting port of the gas path channel is communicated with the testing channel in a butt joint mode, the connecting position between the first connecting port and the testing channel is sealed through the sealing structure, the second connecting port of the gas path channel is communicated with the partial pressure channel in a butt joint mode, and the connecting position between the second connecting port and the partial pressure channel is sealed through the sealing structure, so that the testing cavity, the testing channel, the gas path channel, the partial pressure channel and the partial pressure cavity are sequentially communicated to form a sealed large-leakage testing channel. The device can be used for carrying out small leakage test and large leakage test on the sealed product, adopts the rotator to realize the switching between each channel, does not need to set up too much control valve, has the characteristics of simple structure, convenient processing and assembly and good test precision, is easy to be processed into the test gas circuit structure of the ultra-small inner cavity, and meets the requirement of the gas tightness test of the ultra-small sealed product and the batch application.

3. The main shell of the invention is also provided with a partial pressure exhaust channel communicated with the containing chamber; during the process that the rotating body rotates along the anticlockwise or clockwise direction relative to the main shell, the air tightness test structure simultaneously meets the following conditions while meeting the conditions of the first, the second and the third: and a fourth condition: the first connecting port of the gas path channel is in butt joint communication with the partial pressure channel, the connecting position between the first connecting port and the partial pressure channel is sealed through the sealing structure, the second connecting port of the gas path channel is in butt joint communication with the partial pressure exhaust channel, and the connecting position between the second connecting port and the partial pressure exhaust channel is sealed through the sealing structure, so that the partial pressure cavity, the partial pressure channel, the gas path channel and the partial pressure exhaust channel are sequentially communicated to form the sealed partial pressure exhaust channel. The gas in the partial pressure cavity is discharged through the gas channel and the partial pressure exhaust channel. The design just can be with the gaseous discharge of partial pressure intracavity through the rotation of drive rotator, need not frequently to operate various control valves, has convenient operation, work efficiency height, advantage that the cost of labor is low.

4. The rotating body of the invention also comprises a rotating shaft which extends outwards from the center of the rotating body along the axial direction; the main shell is also provided with a driving mechanism, an output shaft of the driving mechanism is fixedly connected with the rotating shaft, the rotating shaft is driven to rotate by the driving mechanism, and then the rotating body is driven by the rotating shaft to rotate clockwise or anticlockwise. Preferably, the drive mechanism is a servo motor. By the design, the automatic control of the rotating body can be realized, the accuracy of the rotating angle is ensured, and the labor intensity is reduced.

5. The air tightness test structure comprises more than two groups of air path structures, wherein each two groups of air path structures are used in parallel, one group is used for testing a to-be-tested sealing product, and the other group is used for testing a standard sealing product; or the air tightness test structure comprises a group of air path structures, the number of the air tightness test structures is more than two, and every two air tightness test structures are used in parallel, wherein one air tightness test structure is used for testing a to-be-tested sealing product, and the other air tightness test structure is used for testing a standard sealing product; by the design, the outer shell and the inner rotating body can be copied and extended by the minimum unit, multiple channels can be used in parallel, and every two channels can form a pressure difference comparison air path for use. The multi-channel parallel connection has the characteristics of good test consistency, convenient operation, high working efficiency and low labor cost.

6. The testing method can realize the switching among all channels by driving the rotating body to rotate, does not need to frequently operate various control valves, and has the characteristics of good testing precision, convenient operation, high working efficiency and low labor cost. The method lays a technical foundation for the vigorous popularization and test in the industry, enables a large amount of application to be possible, can well promote the development of the industry and promote the development of the high-end equipment manufacturing industry. In the test use mode, a direct pressure test, a differential pressure test or a direct pressure comparison test can be adopted at the same time.

7. The processing method of the invention divides the main shell body into more than two sub-shells, has the characteristics of convenient processing and simple assembly, and solves the processing of the containing chamber, the gas circuit and the sealing groove in the shell and the assembly difficulty of the sealing element.

Drawings

FIG. 1 is a schematic structural diagram of a rotary tightness testing device according to a first embodiment in an inflated or deflated state;

FIG. 2 is a schematic structural diagram of the rotary tightness testing device according to the first embodiment in a pressure maintaining or small leakage testing state;

FIG. 3 is a schematic structural diagram of a rotating body according to a first embodiment;

FIG. 4 is a schematic structural diagram of a rotary tightness testing device with a rotating shaft and a driving mechanism according to a first embodiment;

FIG. 5 is a schematic structural diagram of a rotary tightness testing device with an air supply device according to a first embodiment;

fig. 6 is a schematic structural diagram of a rotary tightness testing device with a constant volume pressure generating device according to the first embodiment;

fig. 7 is a schematic structural diagram of a rotary tightness testing device using a split main housing according to a first embodiment;

fig. 8a is a schematic structural diagram of a rotary tightness testing device according to a first embodiment of the present invention, which employs a first testing method and a multi-station direct pressure test;

fig. 8b is a schematic structural diagram of a rotary tightness testing device according to a second embodiment of the present invention, which employs a multi-station direct pressure test;

fig. 8c is a schematic structural diagram of a rotary tightness testing device according to a multi-station direct pressure test in the first testing mode iii according to the first embodiment;

fig. 9 is a schematic structural diagram of a rotary tightness testing device using a multi-station differential pressure test according to a first embodiment;

fig. 10 is a schematic structural view of a rotary tightness testing device according to a second embodiment, which employs a sealing sleeve and a second sealing ring;

FIG. 11 is a schematic structural diagram of a rotary tightness testing device according to a third embodiment in an inflated or deflated state;

FIG. 12 is a schematic structural diagram of a rotary tightness testing device according to a third embodiment in a pressure maintaining or small leakage testing state;

FIG. 13 is a schematic structural diagram of a rotary tightness testing device according to a third embodiment under a large leakage partial pressure condition;

fig. 14 is a schematic structural view of a rotary tightness testing device according to a fourth embodiment, which employs a sealing sleeve and a second sealing ring;

FIG. 15 is a schematic structural view of the rotary tightness testing device in an inflated or deflated state according to the fifth embodiment;

FIG. 16 is a schematic structural diagram of the rotary tightness testing device according to the fifth embodiment in a pressure maintaining or small leakage testing state;

FIG. 17 is a schematic structural diagram of a rotary tightness testing device in a large leakage partial pressure state according to a fifth embodiment;

FIG. 18 is a schematic structural diagram of a rotary tightness testing device in a partial pressure venting state according to a fifth embodiment;

fig. 19 is a schematic structural view of a rotary sealability testing apparatus of embodiment five, which employs a bisected split main housing;

fig. 20 is a schematic structural view of a rotary sealability testing apparatus of embodiment five, which employs a quartered split main housing;

fig. 21 is a schematic structural view of a rotary sealing performance testing apparatus using a sealing sleeve and a second sealing ring according to a sixth embodiment.

In the figure: 10. a main housing; 11. a housing chamber; 12. an intake/exhaust passage; 13. a test channel; 14. a pressure dividing channel; 15. a partial pressure exhaust channel; 20. a rotating body; 21. a gas path channel; 211. a first connection port; 212. a second connection port; 30. testing the clamp; 31. a test fixture body; 32. a test chamber; 40. a voltage dividing structure; 41. a pressure dividing structure body; 42. a pressure-dividing cavity; 51. a first seal ring; 52. sealing sleeves; 53. a second seal ring; 61. a rotating shaft; 62. a drive mechanism; 71. a pressure sensor; 72. a differential pressure sensor; 81. an air supply device; 82. a constant volume pressure generating device; 100. a standard seal; 200. and (5) sealing the product to be tested.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict. Except as specifically noted, the materials and equipment used in this example are commercially available. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the 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 application. In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.

In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "connected," "communicating," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a connection through an intervening medium, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The first embodiment is as follows:

referring to fig. 1 to 9, a rotary type sealability testing apparatus includes at least one airtightness testing structure including a main housing 10, a rotating body 20, a testing jig 30;

an accommodating chamber 11 is arranged in the main shell 10, and an air inlet/exhaust channel 12 and a test channel 13 which are respectively communicated with the accommodating chamber 11 are arranged on the main shell 10;

the rotating body 20 is disposed in the accommodating chamber 11, and the rotating body 20 and the main casing 10 can rotate relatively; an air channel 21 is arranged in the rotating body 20, and both ends of the air channel 21 are provided with a first connecting port 211 and a second connecting port 212 which are respectively communicated with the accommodating chamber;

the test fixture 30 comprises a test fixture body 31, a test cavity 32 is arranged on the test fixture body 31, and the test cavity 32 is communicated with the test channel 13;

the device also comprises a sealing structure;

the first condition is as follows: the first connecting port of the air path channel is in butt-joint communication with the air inlet/outlet channel, the joint between the first connecting port and the air inlet/outlet channel is sealed by a sealing structure, the second connecting port of the air path channel is in butt-joint communication with the testing channel, and the joint between the second connecting port and the testing channel is sealed by a sealing structure, so that the air inlet/outlet channel, the air path channel, the testing channel and the testing cavity are sequentially communicated to form a sealed air charging/sucking channel;

In this embodiment, the device is used for carrying out small-leakage test on the sealing product. In order to achieve the minimum test volume and improve the detection sensitivity, the test cavity is designed in a copying mode aiming at the tested sealing product.

In the preferred embodiment of the present invention, the sealing structure includes a first sealing ring 51 respectively disposed at the openings of the air inlet/outlet passage, the testing passage, and the testing chamber adjacent to one side of the receiving chamber. Specifically, the first seal ring may be a rubber seal ring, a hydrogenated nitrile rubber seal ring, or a silicone rubber seal ring.

Referring to fig. 4, in a preferred embodiment of the present invention, the rotating body further includes a rotating shaft 61 extending outward from the center of the rotating body along the axial direction; the main shell is also provided with a driving mechanism 62, an output shaft of the driving mechanism is fixedly connected with the rotating shaft, the rotating shaft is driven to rotate by the driving mechanism, and then the rotating body is driven by the rotating shaft to rotate clockwise or anticlockwise. Preferably, the drive mechanism is a servo motor. By the design, the automatic control of the rotating body 20 can be realized, the accuracy of the rotating angle is ensured, and the labor intensity is reduced.

Referring to fig. 5, in the preferred embodiment of the present invention, the present invention further includes an air source device 81 connected to the air inlet/outlet channel; the air source device is a vacuum pumping device or an air charging/sucking pressurizing device. Alternatively, referring to fig. 6, the air supply device 81 is replaced by a constant volume pressure generating device 82. The principle of the constant volume pressure generating device is as follows: the piston moves forwards to enable the space of the test loop to be reduced, the compressed air enables the pressure to rise so as to meet the requirement of testing the product, the function of air filling/sucking is achieved, the piston moves backwards to enable the space of the test loop to be increased, the air pressure is reduced, and the function of exhausting is achieved.

Referring to fig. 7, in a preferred embodiment of the present invention, the main housing is a split structure, and includes more than two sub-housings, and the sub-housings are fixedly connected with each other in a detachable manner. Specifically, the shell body can be divided into two halves, four quarters and the like.

In a preferred embodiment of the invention, the receiving chamber is circular in shape, and the rotating body is circular in shape.

In a preferred embodiment of the invention, a pressure sensor is arranged in the test chamber. The pressure sensor is a direct pressure sensor.

In a preferred implementation of the invention, the air tightness test structure comprises more than two groups of air path structures, and each air path structure consists of an air inlet/exhaust channel, a test channel, an air path channel and a test cavity;

the air tightness test structure meets any one of the following test modes:

referring to fig. 8a, the first test method: each two air tightness test structures are used in parallel, wherein one air tightness test structure is used for testing a to-be-tested sealing product 200, the other air tightness test structure is used for testing a standard sealing product 100, and the air path structures of the two air tightness test structures are both provided with a pressure sensor 71 for detecting air pressure in a small-leakage test channel to form a pressure difference comparison air path;

referring to fig. 8b, the second test method: one air tightness test structure is used for testing the standard sealing product, and the rest air tightness test structures are respectively used for testing the sealing product to be tested; each air tightness test structure is provided with a pressure sensor for detecting the air pressure in the small leakage test channel;

referring to fig. 8c, the test method three: all the air tightness test structures are respectively used for testing the to-be-tested sealing product; and a pressure sensor for detecting air pressure in the small-leakage test channel is arranged in the air path structure of each air tightness test structure.

Referring to fig. 9, in a preferred embodiment of the present invention, a differential pressure sensor 72 is further disposed between the two sets of pressure sensors of the air path structure, and the differential pressure sensor detects a pressure difference between the two test chambers.

In a preferred implementation of the invention, two channels which are perpendicular to each other and have the depth equal to the radius of the internal rotating shaft body are processed on the same radial plane of the rotating body along the radial direction, and the two channels are communicated on the shaft center to form an air passage channel.

In a preferred embodiment of the present invention, the testing method of the rotary sealing performance testing apparatus includes any one of the following testing methods:

the test method comprises the following steps:

a testing method of a rotary type tightness testing device comprises the following steps:

1) testing a single sealing product:

And a second testing method comprises the following steps:

and (3) a double-seal product comparison test step:

The third test method comprises the following steps:

1) testing a constant-volume inflatable single sealing product:

The test method four comprises the following steps:

a large leakage test step: the rotating body or the main shell is driven to rotate counterclockwise or clockwise by a preset angle, so that a first connecting port of the air channel is in butt joint communication with the air inlet/outlet channel, a second connecting port of the air channel is in butt joint communication with the testing channel, and the air inlet/outlet channel, the air channel, the testing channel and the testing cavity are sequentially communicated to form a sealed air charging/sucking channel; after the pistons of the two constant volume type pressure generating devices are respectively pushed to the same preset positions, stopping pushing the pistons of the constant volume type pressure generating devices; comparing the pressure difference values in the two test cavities, and if the pressure difference value exceeds a specified range, judging that the to-be-tested sealing product is a large-leakage unqualified product; and if the pressure difference value is within the specified range, judging that the to-be-detected sealing product is a large-leakage qualified product.

A processing method of a rotary type tightness testing device comprises the following steps:

Example two:

referring to fig. 10, the present embodiment is characterized in that: the sealing structure comprises a sealing sleeve 52 and a second sealing ring 53 which are sleeved on the periphery of the rotating body, a first through hole and a second through hole are formed in the side wall of the sealing sleeve, the first through hole is communicated with a first connecting port of the air channel, and the second through hole is communicated with a second connecting port of the air channel; and a second sealing ring is arranged at an opening of the testing cavity, which is close to one side of the containing cavity. Specifically, the sealing sleeve may be a rubber sealing sleeve, a hydrogenated nitrile rubber sealing sleeve or a silicone rubber sealing sleeve, and the second sealing ring may be a rubber sealing ring, a hydrogenated nitrile rubber sealing ring or a silicone rubber sealing ring.

assembling: seal cover is installed in the periphery of rotator, installs a second sealing washer in test fixture's second seal groove, installs the rotator in the chamber that holds of main casing body, aligns test fixture's test chamber and the test channel of the main casing body, can have sufficient space to put into the product that awaits measuring to the test chamber when both parts, can realize that test chamber and test channel are sealed to switch on when both paste tightly.

The rest is the same as the first embodiment.

Example three:

referring to fig. 11-13, the present embodiment is characterized in that:

the pressure dividing structure 40 is also included, and the main shell is also provided with a pressure dividing channel 14 communicated with the accommodating chamber; the partial pressure structure 40 comprises a partial pressure structure body 41, a partial pressure cavity 42 is arranged on the partial pressure structure body 41, and the partial pressure cavity 42 is communicated with the partial pressure channel 14;

and (3) carrying out a third condition: the first connecting port of the gas path channel is in butt joint communication with the testing channel, the connecting position between the first connecting port and the testing channel is sealed through a sealing structure, the second connecting port of the gas path channel is in butt joint communication with the pressure dividing channel, and the connecting position between the second connecting port and the pressure dividing channel is sealed through a sealing structure, so that the testing cavity, the testing channel, the gas path channel, the pressure dividing channel and the pressure dividing cavity are sequentially communicated to form a sealed large-leakage testing channel.

In a preferred implementation of the present invention, the sealing structure includes first sealing rings respectively disposed at openings of the air inlet/outlet channel, the testing channel, the pressure dividing channel, the testing cavity, and the pressure dividing cavity adjacent to one side of the accommodating cavity;

in a preferred implementation of the invention, the air tightness test structure comprises more than two groups of air path structures, and each air path structure consists of an air inlet/exhaust channel, a test channel, a pressure dividing channel, an air path channel, a test cavity and a pressure dividing cavity;

the air tightness test structure meets any one of the following test modes:

The other structure is the same as the first embodiment.

The device is used for testing small leakage and large leakage of the sealing product.

the test method comprises the following steps:

1) testing a single sealing product:

1-3) a small leakage test step; continuously driving the rotating body or the main shell to rotate in the same direction by a preset angle, wherein the first connecting port of the air channel is disconnected with the air inlet/outlet channel in a staggered manner, the second connecting port of the air channel is disconnected with the testing channel in a staggered manner, and the testing channel is closed, so that the testing channel is communicated with the testing cavity to form a sealed small-leakage testing channel; after the preset pressure maintaining time, detecting a pressure value in the test cavity, and recording the pressure value as P2; comparing the pressure difference between the P2 and the P1, and if the pressure difference exceeds a specified range, judging that the to-be-detected sealing product is a small-leakage unqualified product; if the pressure difference value is within the specified range, judging that the sealed product to be detected is a small-leakage qualified product;

1-4) a large leakage test step; the rotating body is continuously driven to rotate in the same direction for a preset angle, so that the first connecting port of the air channel is in butt joint communication with the testing channel, the joint between the first connecting port and the testing channel is sealed through the sealing structure, the second connecting port of the air channel is in butt joint communication with the pressure dividing channel, and the joint between the second connecting port and the pressure dividing channel is sealed through the sealing structure, so that the testing cavity, the testing channel, the air channel, the pressure dividing channel and the pressure dividing cavity are sequentially communicated to form a sealed large-leakage testing channel; injecting the gas in the test cavity into the partial pressure cavity, detecting the pressure value in the test cavity after a preset test time, and recording the pressure value as P3; comparing the pressure difference between the P3 and the P1, and if the pressure difference exceeds a specified range, judging that the to-be-detected sealing product is a large-leakage unqualified product; and if the pressure difference value is within the specified range, judging that the to-be-detected sealing product is a large-leakage qualified product.

And a second testing method comprises the following steps:

and (3) a double-seal product comparison test step:

The third test method comprises the following steps:

Example four:

referring to fig. 14, the present embodiment is characterized in that: the sealing structure comprises a sealing sleeve and a second sealing ring which are sleeved on the periphery of the rotating body, a first through hole and a second through hole are formed in the side wall of the sealing sleeve, the first through hole is communicated with a first connecting port of the air channel, and the second through hole is communicated with a second connecting port of the air channel; the opening parts of the test cavity and the pressure division cavity, which are adjacent to one side of the containing cavity, are provided with second sealing rings.

The other steps are the same as those of the embodiment.

Example five:

referring to fig. 15-18, the present embodiment is characterized in that:

the main shell 10 is also provided with a partial pressure exhaust channel 15 communicated with the accommodating chamber; during the rotation of the rotating body in the counterclockwise or clockwise direction with respect to the main casing, the air tightness test structure simultaneously satisfies the following conditions:

and a fourth condition: the first connecting port of the air channel is in butt-joint communication with the partial pressure channel, and the joint between the first connecting port and the partial pressure channel is sealed by a sealing structure, the second connecting port of the air channel is in butt-joint communication with the partial pressure exhaust channel, and the joint between the second connecting port and the partial pressure exhaust channel is sealed by a sealing structure, so that the partial pressure cavity, the partial pressure channel, the air channel and the partial pressure exhaust channel are sequentially communicated to form the sealed partial pressure exhaust channel.

The device is used for testing small leakage and large leakage of the sealing product and can also perform partial pressure exhaust operation.

In a preferred implementation of the present invention, the sealing structure includes a first sealing ring disposed at an opening of the intake/exhaust channel, the testing channel, the pressure dividing channel, the testing cavity, the pressure dividing cavity, and a side of the pressure dividing exhaust channel adjacent to the accommodating chamber;

in a preferred implementation of the invention, the air tightness test structure comprises more than two groups of air path structures, and each air path structure consists of an air inlet/outlet channel, a test channel, a pressure dividing and air outlet channel, an air path channel, a test cavity and a pressure dividing cavity;

the air tightness test structure meets any one of the following test modes:

In a preferred implementation of the invention, two channels with an included angle of F and a depth equal to the radius of the inner rotating shaft body are processed on the same radial plane of the rotating body along the radial direction, and the two channels are communicated on the axis to form the gas path channel; the air inlet/outlet channel 12, the test channel 13, the partial pressure channel 14, the partial pressure outlet channel 15 and the air passage channel 21 are positioned on the same vertical plane; an included angle a is formed between the air inlet/outlet channel 12 and the test channel 13, an included angle b is formed between the test channel 13 and the pressure dividing channel 14, and an included angle c is formed between the pressure dividing channel 14 and the pressure dividing and air outlet channel 15; the air passage 21 is L-shaped, the air passage 21 includes a first passage and a second passage, a connection point of the first passage and the second passage is located at a center position of the rotating body 20, an included angle d is formed between the first passage and the second passage of the air passage 21, an included angle e is formed between the partial pressure exhaust passage 15 and the air inlet/exhaust passage 12, and e is equal to d, a, b, c, and F, which are equal to 90 °. By the design, the butt joint of the air channel 21 with the air inlet/outlet channel 12, the testing channel 13, the partial pressure channel 14 and the partial pressure exhaust channel 15 is more accurate in the switching process, and the optimal arrangement space can be better reserved for the testing cavity 32 or the partial pressure cavity 42, so that the overall layout of the device is more reasonable and compact, and the 90-degree design also enables the air flow to be smoother.

The other steps are the same as those of the embodiment.

the test method comprises the following steps:

1) testing a single sealing product:

1-3) a small leakage test step; continuously driving the rotating body or the main shell to rotate in the same direction by a preset angle (such as 45 degrees), wherein the first connecting port of the air channel is disconnected with the air inlet/exhaust channel in a staggered manner, the second connecting port of the air channel is disconnected with the testing channel in a staggered manner, and the testing channel is closed, so that the testing channel is communicated with the testing cavity to form a sealed small-leakage testing channel; after the preset pressure maintaining time, detecting a pressure value in the test cavity, and recording the pressure value as P2; comparing the pressure difference between the P2 and the P1, and if the pressure difference exceeds a specified range, judging that the to-be-detected sealing product is a small-leakage unqualified product; and if the pressure difference value is within the specified range, judging that the sealed product to be detected is a small-leakage qualified product.

1-4) a large leakage test step; continuously driving the rotating body to rotate by a preset angle (such as 45 degrees) along the same direction, so that the first connecting port of the air channel is in butt joint communication with the testing channel, the joint between the first connecting port and the testing channel is sealed by the sealing structure, the second connecting port of the air channel is in butt joint communication with the pressure dividing channel, and the joint between the second connecting port and the pressure dividing channel is sealed by the sealing structure, so that the testing cavity, the testing channel, the air channel, the pressure dividing channel and the pressure dividing cavity are sequentially communicated to form a sealed large-leakage testing channel; injecting the gas in the test cavity into the partial pressure cavity, detecting the pressure value in the test cavity after a preset test time, and recording the pressure value as P3; comparing the pressure difference between the P3 and the P1, and if the pressure difference exceeds a specified range, judging that the to-be-detected sealing product is a large-leakage unqualified product; and if the pressure difference value is within the specified range, judging that the to-be-detected sealing product is a large-leakage qualified product.

1-5) partial pressure exhaust step: continuously driving the rotating body to rotate by a preset angle (for example, 90 degrees) along the same direction, so that the first connecting port of the air channel is in butt joint communication with the partial pressure channel, the connecting part between the first connecting port and the partial pressure channel is sealed by the sealing structure, the second connecting port of the air channel is in butt joint communication with the partial pressure exhaust channel, and the connecting part between the second connecting port and the partial pressure exhaust channel is sealed by the sealing structure, and the partial pressure cavity, the partial pressure channel, the air channel and the partial pressure exhaust channel are sequentially communicated to form a sealed partial pressure exhaust channel; the gas in the partial pressure cavity is discharged through the gas channel and the partial pressure exhaust channel;

1-6) an air exhausting step: the driving rotating body continues to rotate in the same direction by a preset angle (for example, 180 degrees), the initial state is returned, the gas in the test chamber is exhausted through the gas path channel and the gas inlet/exhaust channel, and one test cycle is completed.

And a second testing method comprises the following steps:

and (3) a double-seal product comparison test step:

testing small leakage; continuously driving the rotating body or the main shell to rotate in the same direction by a preset angle (such as 45 degrees), wherein the first connecting port of the air channel is disconnected with the air inlet/exhaust channel in a staggered manner, the second connecting port of the air channel is disconnected with the test channel in a staggered manner, and the test channel is closed, so that the test channel is communicated with the test cavity to form a sealed small-leakage test channel; after the preset pressure maintaining time, comparing the pressure difference values in the two test cavities, and if the pressure difference value exceeds a specified range, judging that the to-be-tested sealing product is a small-leakage unqualified product; and if the pressure difference value is within the specified range, judging that the sealed product to be detected is a small-leakage qualified product.

A large leakage test step: continuously driving the rotating body to rotate by a preset angle (such as 45 degrees) along the same direction, so that the first connecting port of the air channel is in butt joint communication with the test channel, the joint between the first connecting port and the test channel is sealed by the sealing structure, the second connecting port of the air channel is in butt joint communication with the pressure dividing channel, and the joint between the second connecting port and the pressure dividing channel is sealed by the sealing structure, so that the test cavity, the test channel, the air channel, the pressure dividing channel and the pressure dividing cavity are sequentially communicated to form a sealed large-leakage test channel; injecting gas in the test chambers into the partial pressure chambers, comparing the pressure difference values in the two test chambers after a preset test time, if the pressure difference value exceeds a specified range, judging that the to-be-tested sealing product is a large-leakage unqualified product, and entering an exhaust link; and if the pressure difference value is within the specified range, judging that the to-be-detected sealing product is a large-leakage qualified product.

Partial pressure exhaust step: continuously driving the rotating body to rotate by a preset angle (for example, 90 degrees) along the same direction, so that the first connecting port of the air channel is in butt joint communication with the partial pressure channel, the connecting part between the first connecting port and the partial pressure channel is sealed by the sealing structure, the second connecting port of the air channel is in butt joint communication with the partial pressure exhaust channel, and the connecting part between the second connecting port and the partial pressure exhaust channel is sealed by the sealing structure, and the partial pressure cavity, the partial pressure channel, the air channel and the partial pressure exhaust channel are sequentially communicated to form a sealed partial pressure exhaust channel; the gas in each partial pressure cavity is discharged through the gas channel and the partial pressure exhaust channel;

and (3) exhausting: the driving rotating body continues to rotate in the same direction by a preset angle (for example, 180 degrees), the initial state is returned, the gas in each test cavity is exhausted through the gas path channel and the gas inlet/exhaust channel, and one test cycle is completed.

Referring to fig. 19 to 20, a method for manufacturing a rotary tightness testing device includes the following steps:

Example six:

referring to fig. 21, the present embodiment is characterized in that: in a preferred implementation of the invention, the sealing structure comprises a sealing sleeve and a second sealing ring which are sleeved on the periphery of the rotating body, a first through hole and a second through hole are arranged on the side wall of the sealing sleeve, the first through hole is communicated with a first connecting port of the air channel, and the second through hole is communicated with a second connecting port of the air channel; the opening parts of the test cavity and the pressure division cavity, which are adjacent to one side of the containing cavity, are provided with second sealing rings.

The rest is the same as in the fifth embodiment.

Other examples are as follows:

the shape of the air passage channel is circular arc or U-shaped or other shapes. An included angle a is formed between the air inlet/outlet channel and the test channel, an included angle b is formed between the test channel and the pressure dividing channel, and an included angle c is formed between the pressure dividing channel and the pressure dividing and air outlet channel, wherein 0 degrees < a <120 degrees, and a-b-c-F. Preferably, 10 ° < a <110 °, more preferably, 30 ° < a <100 °. By the design, the air flow can be more smooth in the switching process of the air path channel; meanwhile, as a is b, c is F, the butt joint of the air channel and the air inlet/outlet channel, the test channel, the pressure division channel and the pressure division exhaust channel in the switching process can be more accurate. The air tightness test structure comprises four groups, six groups, eight groups or more groups of air path structures, and every two groups of air path structures are used in parallel. The number of the air tightness test structures is four, six, eight or more, and every two air tightness test structures are used in parallel. The tightness testing device is not limited to work in a rotating mode, and can realize the switching of the air path state through the axial sliding of the shaft and the shell, thereby realizing the equivalent testing function.

While only certain features and embodiments of the application have been illustrated and described, many modifications and changes may occur to those skilled in the art (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the scope and spirit of the invention in the claims.

Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention should not be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. The rotary type tightness testing device is characterized by comprising at least one air tightness testing structure, wherein the air tightness testing structure comprises a main shell, a rotating body and a testing clamp;

the device also comprises a sealing structure;

2. The rotary seal testing device according to claim 1, wherein the sealing structure comprises a first sealing ring disposed at the opening of the inlet/outlet passage, the testing passage, and the testing chamber adjacent to one side of the receiving chamber, respectively;

3. The rotary tightness testing device according to claim 1, further comprising a pressure dividing structure, wherein the main housing is further provided with a pressure dividing channel communicated with the accommodating chamber; the pressure dividing structure comprises a pressure dividing structure body, a pressure dividing cavity is arranged on the pressure dividing structure body, and the pressure dividing cavity is communicated with the pressure dividing channel;

4. The rotary seal testing device according to claim 3, wherein the sealing structure comprises first sealing rings respectively disposed at openings of the air inlet/outlet channel, the testing channel, the pressure dividing channel, the testing chamber and the pressure dividing chamber adjacent to one side of the accommodating chamber;

5. The rotary seal testing device according to claim 3, wherein the main housing further comprises a partial pressure exhaust channel in communication with the accommodating chamber; during the rotation of the rotating body in the counterclockwise or clockwise direction with respect to the main casing, the air tightness test structure simultaneously satisfies the following conditions:

6. The rotary tightness testing device according to claim 5, wherein the sealing structure comprises a first sealing ring respectively disposed at the openings of the air inlet/outlet channel, the testing channel, the pressure dividing channel, the testing cavity, the pressure dividing cavity, and the pressure dividing and air outlet channel adjacent to one side of the accommodating chamber;

7. The rotary seal testing device according to any of claims 1 to 6, wherein the rotary body further comprises a rotary shaft extending axially outward from a center of the rotary body; still be equipped with actuating mechanism on the main casing body, actuating mechanism's output shaft with pivot fixed connection is rotatory by actuating mechanism drive pivot, drives the rotator by the pivot again along clockwise or anticlockwise rotation.

8. The rotary type tightness testing device according to claim 1, wherein the air tightness testing structure comprises more than two groups of air path structures, and the air path structures are composed of an air inlet/outlet channel, a testing channel, an air path channel and a testing cavity;

the air tightness test structure meets any one of the following test modes:

9. The rotary type tightness testing device according to claim 3, wherein the air tightness testing structure comprises more than two groups of air path structures, and the air path structures are composed of an air inlet/outlet channel, a testing channel, a pressure dividing channel, an air path channel, a testing cavity and a pressure dividing cavity;

the air tightness test structure meets any one of the following test modes:

10. The rotary type tightness testing device according to claim 5, wherein the air tightness testing structure comprises more than two groups of air path structures, and the air path structures are composed of an air inlet/outlet channel, a testing channel, a pressure dividing and air outlet channel, an air path channel, a testing cavity and a pressure dividing cavity;

the air tightness test structure meets any one of the following test modes:

11. The rotary seal testing device according to any of claims 8 to 10, further comprising a pressure sensor for detecting the air pressure in the test chamber.

12. The rotary seal testing device according to claim 11, wherein a differential pressure sensor is further disposed between each two sets of pressure sensors of the air path structure.

13. The rotary seal testing apparatus according to claim 1, further comprising an air supply means connected to the air inlet/outlet passage; the air source device is a vacuum pumping device or an air charging/sucking pressurizing device.

14. The rotary seal testing device according to claim 1, further comprising a constant volume pressure generating device connected to the air inlet/outlet passage.

15. The rotary seal tightness testing device according to claim 1, wherein the main housing is a split structure, and comprises more than two sub-housings, and the sub-housings are fixedly connected with each other in a detachable connection manner.

16. The rotary seal tightness testing device according to claim 1, wherein the receiving chamber is circular in shape, and the rotating body is circular in shape corresponding thereto.

17. The rotary tightness testing device according to claim 1, wherein two channels having an included angle F and a depth equal to a radius of the inner rotary shaft are radially formed on a same radial plane of the rotary body, and the two channels penetrate through the shaft center to form the air passage.

18. The rotary seal testing device according to claim 17, wherein the air inlet/outlet channel, the test channel, the pressure dividing and air outlet channel and the air passage channel are located on the same vertical plane; an included angle a is formed between the air inlet/outlet channel and the test channel, an included angle b is formed between the test channel and the partial pressure channel, and an included angle c is formed between the partial pressure channel and the partial pressure outlet channel, wherein 0 degree < a <120 degrees, and a ═ b ═ c ═ F.

19. The rotary sealing test device according to claim 18, wherein the air passage has an L-shape, the air passage includes a first passage and a second passage, a joint of the first passage and the second passage is located at a center of the rotary body, an included angle d is formed between the first passage and the second passage of the air passage, and an included angle e is formed between the partial pressure exhaust passage and the air inlet/exhaust passage, and e-d-b-c-F-90 °.

20. A method of testing the rotary seal tightness testing device according to claim 1, comprising the steps of:

1) testing a single sealing product:

21. The method of testing a rotary seal testing apparatus of claim 20, comprising the steps of:

1) in the single sealing product testing step, after the small leakage testing step is completed, the method further comprises the following steps:

22. The method of testing a rotary seal tightness testing device according to claim 21,

23. A method of testing the rotary seal tightness testing device according to claim 1, comprising the steps of:

and (3) a double-seal product comparison test step:

24. The method of claim 23, further comprising, after the step of performing a small leak test:

25. The method of claim 24, further comprising, after the step of performing a leak test:

26. The method of claim 25, wherein the pressure difference between the two test chambers is detected by a differential pressure sensor.

27. A method of testing the rotary seal tightness testing device according to claim 1, comprising the steps of:

1) testing a constant-volume inflatable single sealing product:

28. A method of testing the rotary seal tightness testing device according to claim 1, comprising the steps of:

29. The method of claim 28, wherein the pressure difference between the two test chambers is detected by a differential pressure sensor.

30. A method of manufacturing a rotary seal testing apparatus according to claim 2, comprising the steps of:

31. A method of manufacturing the rotary seal testing apparatus of claim 4, comprising the steps of:

32. A method of manufacturing the rotary seal testing apparatus of claim 6, comprising the steps of:

33. A method of manufacturing a rotary seal testing apparatus according to claim 2, comprising the steps of:

34. A method of manufacturing the rotary seal testing apparatus of claim 4, comprising the steps of:

35. A method of manufacturing the rotary seal testing apparatus of claim 6, comprising the steps of: