阅读说明：本技术 产品气密性检测装置及其检测方法 (Product air tightness detection device and detection method thereof ) 是由 尹朋 黄祥钧 侯晓东 兰启庆 于 2018-10-26 设计创作，主要内容包括：一种产品气密性检测装置(100)和检测方法,产品气密性检测装置(100)包括：密闭容器(10)、压力产生装置(20)和压力检测装置(30),密闭容器(10)内形成有密封腔(12),用于容置待检测产品(A)；压力产生装置(20)与密封腔(12)连接,用于相对密闭容器(10)运动以改变密封腔(12)的密封体积；压力检测装置(30)设置于密封腔(12)中,用于检测密封腔(12)中的压力值。产品气密性检测装置(100)通过测量标准样品(A’)和待检测产品(A)在密封腔(12)中处于同样条件下的压力值差来判断待检测产品(A)的气密性。该装置(100)结构简单,且检测方法新颖,可以集成到自动化生产线上,进行自动化检测,从而可以有效提高测试效率。(A product airtightness detection apparatus (100) and a detection method, the product airtightness detection apparatus (100) comprising: the device comprises a closed container (10), a pressure generating device (20) and a pressure detecting device (30), wherein a sealed cavity (12) is formed in the closed container (10) and is used for containing a product (A) to be detected; the pressure generating device (20) is connected with the sealed cavity (12) and is used for moving relative to the closed container (10) to change the sealed volume of the sealed cavity (12); the pressure detection device (30) is arranged in the sealed cavity (12) and used for detecting the pressure value in the sealed cavity (12). The product air tightness detection device (100) judges the air tightness of the product (A) to be detected by measuring the pressure value difference of the standard sample (A') and the product (A) to be detected under the same condition in the sealed cavity (12). The device (100) is simple in structure, novel in detection method and capable of being integrated on an automatic production line for automatic detection, and therefore testing efficiency can be effectively improved.)

The product airtightness detection device is characterized by comprising:

the device comprises a closed container, a detection device and a control device, wherein a sealed cavity is formed in the closed container and is used for containing a product to be detected;

the pressure generating device is connected with the closed container and used for moving relative to the closed container to change the sealing volume of the sealing cavity;

and the pressure detection device is arranged in the sealed cavity and used for detecting the pressure value in the sealed cavity.

The apparatus for detecting the airtightness of a product according to claim 1, wherein the hermetic container has a cylindrical shape, a piston tube is formed on the hermetic container, and the pressure generating means includes a piston which is engaged with the piston tube and is movable relative to the hermetic container to change the sealed volume of the sealed chamber.

The product airtightness detection apparatus according to claim 2, wherein the closed container has a straight cylindrical shape, an L-shape, or an inverted T-shape.

The product airtightness detection apparatus according to claim 2, wherein a scale is provided on the piston pipe for reading a position where the piston is located.

The product airtightness detection apparatus according to claim 2, wherein the pressure generation apparatus further comprises a motor and a connecting rod, the motor is connected to the connecting rod, the connecting rod is connected to the piston, and the motor is configured to drive the piston to move.

The product airtightness detection apparatus according to claim 2, further comprising a controller, wherein the controller is respectively connected to the pressure generation apparatus and the pressure detection apparatus, and is configured to receive the pressure value sent by the pressure detection apparatus in real time, and to control the pressure generation apparatus to change the sealing volume of the sealing cavity.

The product airtightness detection apparatus according to claim 6, wherein the pressure generation apparatus further comprises a motor and a connecting rod, the motor is connected to the controller, the connecting rod is connected to the piston, and the motor is configured to receive a control command from the controller and drive the connecting rod to drive the piston to move.

The product airtightness detection apparatus according to claim 1, wherein the product airtightness detection apparatus comprises at least two of the pressure generation apparatuses, and each of the pressure generation apparatuses is connected to the closed container.

The product airtightness detection apparatus according to claim 1, wherein a sealing opening is further formed in the sealed container, and a sealing door which is in sealing fit with the sealing opening is provided at the sealing opening and is used for opening or closing the sealed container to put in or take out the product to be detected.

A product air tightness detection method of a product air tightness detection device is characterized by comprising the following steps:

a sealed cavity of the closed container receives a product to be detected and puts in the sealed cavity;

controlling the product to be detected to be in a preset sealing volume;

controlling a pressure detection device to detect the pressure value in the sealed cavity when the product to be detected is in the preset sealed volume;

and judging whether the absolute value of the difference value of the pressure value and the standard pressure value is smaller than or equal to a preset value, if so, determining that the sealing performance of the product to be detected is qualified, and if not, determining that the sealing performance of the product to be detected is unqualified.

The method for detecting the airtightness of a product according to claim 10, wherein the preset value is five percent of the standard pressure value.

The product airtightness detection method according to claim 10, wherein when the sealed cavity of the closed container receives the product to be detected, a pressure value in the sealed cavity is an ambient pressure value.

The method for detecting the airtightness of the product according to claim 10, further comprising, before the detection of the airtightness:

a sealed cavity of the closed container receives a standard sample and is put in, and the position of the pressure generating device at the moment is recorded as a first position;

controlling the pressure generating device to start moving relative to the closed container from the first position;

controlling the pressure detection device to detect the pressure value in the sealed cavity in real time;

when the pressure value in the sealed cavity is equal to the standard pressure value, controlling the pressure generating device to stop moving, and recording the position of the pressure generating device at the moment as a second position;

controlling the pressure generating device to move from the second position to the first position, and taking out the standard sample at the first position.

The product airtightness detection method according to claim 13, wherein when the pressure generation device is at the first position, the pressure value in the sealed chamber is an ambient pressure value.

The product airtightness detection method according to claim 14, wherein when the pressure generation means is located at the second position, the sealed volume of the sealed chamber is the preset sealed volume.

The method for detecting the airtightness of a product according to claim 15, wherein the step of receiving the insertion of the product to be detected into the sealed cavity of the closed container comprises:

when the container is at the first position, the sealed cavity of the closed container receives the product to be detected and is placed in the sealed cavity; the step of controlling the product to be detected to be in the preset sealed volume comprises: controlling the pressure generating device to start moving relative to the closed container from the first position;

controlling the pressure generating device to stop moving when at the second position.

The product airtightness detection method according to claim 10, wherein the standard pressure value ranges from:

wherein P represents a standard pressure value, P₀Representing the ambient pressure value, V_ARepresents the maximum volume, V, of the sealed chamber_BRepresents the minimum volume, V, of the sealed chamber_DRepresenting the volume of the product to be detected.

The method for detecting the airtightness of the product according to claim 16, further comprising, after the detection of the airtightness of the product to be detected:

controlling the pressure generating device to move from the second position to the first position;

controlling the pressure detection device to detect the pressure value in the sealed cavity in real time;

and when the pressure value is equal to the ambient pressure value, controlling the pressure generating device to stop moving.

The product airtightness detection method according to claim 18, further comprising, after controlling the pressure generation means to stop moving:

taking out the product to be detected;

controlling the pressure generating device to move to the first position relative to the closed container.