Connection device and detection method for entering and exiting negative pressure environment

Abstract

The present invention provides a connection device and a detection method for entering and exiting a negative pressure detection environment. A hollow cavity is provided in a base body, which can accommodate an intermediate rotor. A sealing member is provided at the contact point between the intermediate rotor and the inner surface of the base body. The intermediate rotor divides the hollow cavity into an upper cavity and a lower cavity, and air cannot be exchanged between the upper cavity and the lower cavity. The upper end extension of the base body is connected to an upper cover plate, which is provided with a feed inlet. The lower end extension of the base body is connected to a lower cover plate, which is provided with a discharge port. The intermediate rotor is provided with a first hole and a second hole corresponding to the feed inlet and the discharge port, respectively. When the intermediate rotor rotates, the material enters the negative pressure detection environment through the feed inlet and the first hole. The present invention can connect the atmosphere and the negative pressure environment detection platform, so that the inflated and packaged materials can smoothly enter and exit the negative pressure detection platform, thereby realizing the online detection of all materials, ensuring that the products leaving the factory are qualified products, and avoiding the evaluation of the product qualification rate through product sampling.

Description

Technical Field

[0001] The present invention relates to the field of vacuum detection technology, and in particular to a connection device for entering and exiting a negative pressure environment and a detection method. Background Art

[0002] The existing negative pressure detection platforms are all independent entities. When testing, the items to be tested need to be placed in them under normal pressure, and then the platform is closed and vacuumed to observe the state of the items to be tested under the negative pressure environment, so as to determine whether the items are leaking. The defect of the prior art is that the negative pressure detection platform is a device independent of the production line. A batch of produced materials can only be sampled, and it is not possible to test all the products produced, which increases the possibility of missing defective products. The main reason for this situation is that the platform in the negative pressure environment is a closed space, and the external atmosphere is everywhere. There is no suitable transition device. Once the negative pressure environment is connected to the outside, the negative pressure environment will not be formed. In view of this, it is urgent to find a new transition method for entering and exiting the negative pressure environment so that the negative pressure detection platform can be connected to the production line, thereby realizing automatic detection of all materials.

[0003] Patent document CN 208043358U discloses a detection device for an inflatable packaging bag for food, which includes a frame, a pressure detection device and a vertical baffle arranged on the frame. The pressure detection device includes a detection head and a cylinder arranged on the frame. The detection head is fixed on the piston rod of the cylinder, and the movement direction of the piston rod is horizontal. A pressure sensor and a display screen for displaying the pressure value of the measured pressure sensor are provided at one end of the detection head away from the cylinder, and the vertical baffle is perpendicular to the piston rod of the cylinder. Summary of the invention

[0004] In view of the defects in the prior art, an object of the present invention is to provide a connection device and a detection method for entering and exiting a negative pressure detection environment.

[0005] A connection device for entering and exiting a negative pressure detection environment according to the present invention comprises a base, an upper cover plate, a lower cover plate and an intermediate rotor;

[0006] A hollow cavity is provided in the base, and the hollow cavity can accommodate the intermediate rotor. A sealing member is provided at the contact point between the intermediate rotor and the inner surface of the base. The intermediate rotor divides the hollow cavity into an upper cavity and a lower cavity, and air cannot be exchanged between the upper cavity and the lower cavity.

[0007] The upper end extension of the base is connected to the upper cover plate, and the upper cover plate is provided with a feed port;

[0008] The lower end extension of the base is connected to the lower cover plate, and the lower cover plate is provided with a discharge port;

[0009] The intermediate rotor is provided with a first hole and a second hole corresponding to the feed port and the discharge port respectively. When the intermediate rotor rotates, the material enters the negative pressure detection environment through the feed port and the first hole.

[0010] Preferably, the hollow cavity is cylindrical, and a sealing groove is provided in the middle of the hollow cavity;

[0011] Sealing grooves are provided at the connection between the base body and the upper cover plate and at the connection between the lower cover plate.

[0012] Preferably, a rotation shaft is provided at a middle position of the upper cover plate and a middle position of the lower cover plate, and the intermediate rotor is driven by a power device to rotate along the rotation shaft.

[0013] Preferably, the intermediate rotor is cylindrical and comprises a first component, a second component and a third component;

[0014] The first component and the third component are arranged opposite to each other, the first component is located on one side of the second component, and the third component is located on the other side of the second component;

[0015] Seals are provided between the first component, the second component and the third component respectively to isolate the air pressure in the first component from that in the third component.

[0016] Preferably, at the initial stage of rotation of the intermediate rotor, the first hole coincides with the feed port and is connected to the atmosphere to form normal pressure, and the second hole coincides with the discharge port and is connected to the negative pressure detection environment to form negative pressure.

[0017] Preferably, a first hole is provided in the first component, and the feed port and the first hole can overlap when the intermediate rotor rotates.

[0018] Preferably, a second hole is provided in the third component, and the discharge port can overlap with the second hole when the intermediate rotor rotates.

[0019] Preferably, the second component is divided into a first area and a second area, the first area and the second area are symmetrical with respect to the center of the intermediate rotor, and grooves are respectively arranged in the first area and the second area.

[0020] According to a detection method for entering and exiting a negative pressure environment provided by the present invention, the connection device for entering and exiting a negative pressure environment is used, and is characterized in that the intermediate rotor is in a starting state and a rotating state;

[0021] In the initial state, the first hole coincides with the feed port and is connected to the atmosphere, and normal pressure is formed in the first hole. The second hole coincides with the discharge port and is connected to the negative pressure detection environment, and negative pressure is formed in the second hole.

[0022] In the rotating state, the first hole is staggered with the feed port until the first hole rotates to the position of the second hole, and the air pressure in the first hole is pumped into negative pressure by the vacuum pump of the negative pressure detection environment. The second hole rotates to the position of the first hole, and normal pressure is formed in the second hole.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The device of the present invention can be connected to the atmosphere and negative pressure environment detection platform, so that the inflated and packaged materials can smoothly enter and exit the negative pressure detection platform, thereby realizing online detection of all materials, ensuring that the products leaving the factory are qualified, and avoiding the evaluation of product qualification rate through product sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 This is a schematic diagram of the assembly of the device during testing;

[0027] Figure 2 is a schematic diagram of the structure of the device;

[0028] Figure 3 is a schematic diagram of the structure of the matrix;

[0029] Figure 4 This is a schematic diagram of the structure of the intermediate rotor. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0031] The present invention provides a technical solution for entering and exiting a negative pressure environment, connecting the atmosphere and a negative pressure environment detection platform, so that the inflated and packaged materials can smoothly enter and exit the negative pressure detection platform, thereby realizing online detection of all materials and ensuring that the products leaving the factory are qualified.

[0032] In a specific implementation, the connection device for entering and exiting the negative pressure detection environment includes a base, an upper cover plate, a lower cover plate and an intermediate rotor; a hollow cavity is arranged in the base, the hollow cavity can accommodate the intermediate rotor, a sealing member is arranged at the contact point between the intermediate rotor and the inner surface of the base, the intermediate rotor divides the hollow cavity into an upper cavity and a lower cavity, and air cannot be exchanged between the upper cavity and the lower cavity; the upper end extension of the base is connected to the upper cover plate, and a feed port is opened on the upper cover plate; the lower end extension of the base is connected to the lower cover plate, and a discharge port is opened on the lower cover plate; the intermediate rotor is provided with a first hole and a second hole corresponding to the feed port and the discharge port respectively, and when the intermediate rotor rotates, the material enters the negative pressure detection environment through the feed port and the first hole. The hollow cavity is cylindrical, and a sealing groove is arranged in the middle of the hollow cavity; the connection between the base and the upper cover plate and the connection between the lower cover plate are both provided with sealing grooves. A rotating shaft is arranged at the middle position of the upper cover plate and the middle position of the lower cover plate, and the intermediate rotor is driven by a power device and rotates along the rotating shaft. The intermediate rotor is cylindrical and includes a first component, a second component and a third component; the first component and the third component are arranged opposite to each other, the first component is located on one side of the second component, and the third component is located on the other side of the second component; sealing components are respectively arranged between the first component, the second component and the third component to isolate the air pressure in the first component and the third component. A first hole is arranged in the first component, and the feed port can coincide with the first hole when the intermediate rotor rotates. A second hole is arranged in the third component, and the discharge port can coincide with the second hole when the intermediate rotor rotates. The second component is divided into a first area and a second area, and the first area and the second area are symmetrical with the center of the intermediate rotor, and grooves are respectively arranged in the first area and the second area. In the initial stage of the rotation of the intermediate rotor, the first hole coincides with the feed port, connected to the atmosphere to form normal pressure, and the second hole coincides with the discharge port, connected to the negative pressure detection environment to form negative pressure.

[0033] In the detection method for entering and exiting a negative pressure environment using the above-mentioned device, the intermediate rotor is in a starting state and a rotating state; in the starting state, the first hole coincides with the feed port and is connected to the atmosphere, and normal pressure is formed in the first hole, and the second hole coincides with the discharge port and is connected to a negative pressure detection environment, and negative pressure is formed in the second hole; in the rotating state, the first hole and the feed port are staggered to the point where the first hole rotates to the position of the second hole, and the air pressure in the first hole is pumped into negative pressure by the vacuum pump of the negative pressure detection environment, and the second hole rotates to the position of the first hole, and normal pressure is formed in the second hole.

[0034] like Figure 1 , Figure 2As shown, the connection device for entering and exiting the negative pressure environment includes a transparent base with an upper cover and a lower cover. The upper cover has a hole corresponding to the material inlet, and the lower cover has a hole corresponding to the material outlet. A rotor is placed between the base, the upper cover, and the lower cover. The rotor is driven by a power device and rotates around a fixed axis. Two holes are opened on the rotor to control the rhythm of the material coming in. When the hole on the rotor coincides with the feed hole, the material enters. After the rotor rotates 180°, the hole on the rotor corresponds to the hole on the upper and lower covers, and the material can fall out, realizing the storage and transportation of the material. Connecting this device with the negative pressure environment platform realizes the online detection of all materials.

[0035] like Figure 2 As shown, the upper cover plate and the lower cover plate are a finely processed flat plate with a hole opened thereon. They need to be staggered when installed on the base, one for the feed port and the other for the discharge port. At the same time, the rotor rotating axis is designed in the middle position.

[0036] like Figure 3 As shown, the base is a hollow whole, the middle part is used to install the rotor, and it is precisely matched with the rotor. A sealing groove is opened in the middle of the upper and lower holes in the base, and a seal is installed to separate the bottom of the rotor to ensure that air cannot be exchanged from the outside of the rotor. A sealing groove is opened on the surface where the base contacts the upper and lower covers to ensure that after the upper and lower covers are covered, external air cannot enter from the joints. The servo motor is selected as the power source for the rotation of the rotor, which can accurately ensure the speed and stop position of the rotor.

[0037] like Figure 4 As shown, the rotor is a cylindrical structure with two holes on it, which are the same size as the holes on the upper and lower cover plates. At the same time, the upper and lower sides of the rotor are divided into three areas, area A, area B, and area C, by sealing grooves. In the initial state, the hole in area A coincides with the hole on the upper cover plate, connected to the atmosphere, and the pressure in the hole is standard atmospheric pressure. The hole in area C coincides with the hole on the lower cover plate, connected to the negative pressure environment, and the pressure in the hole is negative pressure. Since the three areas are separated by sealing devices, the negative pressure in area C cannot affect the positions of area B and area A. The rotor rotates, and area A turns to the position of area C. During the rotation, once the sealing device on the outside of area A exceeds the opening of the upper cover plate, area A will be isolated until it turns to area C, and then area A will be connected to the negative pressure environment. At this time, the air pressure in area A will be pumped into negative pressure by the vacuum pump of the negative pressure environment, and the position of area C will be rotated to the original position of area A. Area C will be connected to the atmosphere, and the air pressure in its upper hole will become atmospheric pressure. Then the material enters the upper hole and starts to repeat the above process. Area B serves as a transition area. The area in contact with the upper cover plate has atmospheric pressure, and the area in contact with the lower cover plate has negative pressure. In this way, as long as the rhythm is controlled well, the material can be smoothly sent into the negative pressure detection environment.

[0038] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A connection device for entering and exiting a negative pressure detection environment, characterized in that: It includes a base, an upper cover plate, a lower cover plate and an intermediate rotor; A hollow cavity is provided in the base, and the hollow cavity can accommodate the intermediate rotor. A sealing member is provided at the contact point between the intermediate rotor and the inner surface of the base. The intermediate rotor divides the hollow cavity into an upper cavity and a lower cavity, and air cannot be exchanged between the upper cavity and the lower cavity. The upper end extension of the base is connected to the upper cover plate, and the upper cover plate is provided with a feed port; The lower end extension of the base is connected to the lower cover plate, and the lower cover plate is provided with a discharge port; The intermediate rotor is provided with a first hole and a second hole corresponding to the feed port and the discharge port respectively, and when the intermediate rotor rotates, the material enters the negative pressure detection environment through the feed port and the first hole; The hollow cavity is cylindrical, and a sealing groove is arranged in the middle of the hollow cavity; Sealing grooves are provided at the connection between the base body and the upper cover plate and at the connection between the base body and the lower cover plate; The intermediate rotor is cylindrical and comprises a first component, a second component and a third component; The first component and the third component are arranged opposite to each other, the first component is located on one side of the second component, and the third component is located on the other side of the second component; Seals are respectively arranged between the first component, the second component and the third component to isolate the air pressure in the first component from that in the third component; At the initial stage of the rotation of the intermediate rotor, the first hole coincides with the feed port and is connected to the atmosphere to form normal pressure, and the second hole coincides with the discharge port and is connected to the negative pressure detection environment to form negative pressure; A first hole is arranged in the first component, and the feed port and the first hole can overlap when the intermediate rotor rotates.

2. The connection device for entering and exiting a negative pressure detection environment according to claim 1, characterized in that: A rotating shaft is arranged at the middle position of the upper cover plate and the middle position of the lower cover plate, and the intermediate rotor is driven by a power device to rotate along the rotating shaft.

3. The connection device for entering and exiting a negative pressure detection environment according to claim 1, characterized in that: A second hole is arranged in the third component, and the discharge port and the second hole can overlap when the intermediate rotor rotates.

4. The connection device for entering and exiting a negative pressure detection environment according to claim 1, characterized in that: The second component is divided into a first area and a second area. The first area and the second area are symmetrical with respect to the center of the intermediate rotor. Grooves are respectively arranged in the first area and the second area.

5. A method for detecting entering and exiting a negative pressure environment, using the connection device for entering and exiting a negative pressure detection environment according to any one of claims 1 to 4, characterized in that: The intermediate rotor is in a starting state and a rotating state; In the initial state, the first hole coincides with the feed port and is connected to the atmosphere, and normal pressure is formed in the first hole. The second hole coincides with the discharge port and is connected to the negative pressure detection environment, and negative pressure is formed in the second hole. In the rotating state, the first hole is staggered with the feed port until the first hole rotates to the position of the second hole, and the air pressure in the first hole is pumped into negative pressure by the vacuum pump of the negative pressure detection environment. The second hole rotates to the position of the first hole, and normal pressure is formed in the second hole.

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