Air tightness detection device

Abstract

The utility model relates to an air tightness detection device, comprising a water tank used for storing liquid; the mounting seat is used for mounting a detected workpiece; the ventilation mechanism is arranged on the mounting seat, is connected with the detected workpiece and is used for ventilating the detected workpiece; the driving mechanism is in driving connection with the detected workpiece or the mounting seat and is used for lifting the mounting seat or the water tank; the device is characterized by further comprising a camera arranged on the mounting seat; the at least one reflective mirror is arranged on the mounting base and arranged on the periphery of the to-be-detected area of the detected workpiece, and the reflective mirror is used for reflecting the bubble condition in the liquid surrounding the periphery of the to-be-detected area of the detected workpiece to the camera; and the controller is connected with the camera and is configured to obtain an air tightness detection result of the detected workpiece according to the image shot by the camera. The device has the advantages that manual interference is not needed, the situations of missed judgment and misjudgment are reduced, the accuracy of a detection result is improved, and manpower is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to airtightness detection technical field especially relates to a kind of airtightness detection device. BACKGROUND

[0002] Filter core is an important component of purification system, when fluid enters filter core with certain specification filter screen, impurities in fluid are blocked, and clean fluid flows out through filter core, different functions can be realized by setting different filter screens in filter core, different purification effects are achieved, and filter core is widely used in pharmaceutical, chemical, water treatment and other fields.Filter core is mostly plastic part, made by bottle body and bottle cap fusion welding, in application process, the pressure in bottle is higher, to ensure that filter core is good airtightness, filter core needs to be sampled in production process.

[0003] The existing filter core airtightness detection method has gas detection method, water detection method, pressure drop method and the like, wherein the gas detection method is a more commonly used method, which usually immerses the filter core in water after being aerated, maintains pressure for a period of time, and observes whether bubbles are generated at the fusion line to determine whether the filter core leaks, but the conventional gas detection method needs manual fixation of the filter core, connection of the air pipe, and then placement of the filter core in water, which is complicated and inefficient.

[0004] To solve the above technical problems, a kind of water purification filter core airtightness detection device is disclosed in Chinese utility model patent with patent number ZL202121108879.3 (authorized publication number CN215573601U), which includes a shell and a mounting plate, a water tank is arranged in the inner cavity of the shell, the inner cavity of the water tank is filled with water, air cylinders are vertically arranged around the top wall of the inner cavity of the shell, the mounting plate is arranged at the bottom of the four air cylinders, an opening is formed in the top of the mounting plate, and an electric push rod is arranged on the top of the mounting plate. The water purification filter core airtightness detection device places the two ends of the filter core between the fixed clamping plate and the movable clamping plate, drives the movable clamping plate through the electric push rod and the connecting plate, fixes the filter core between the two clamping plates, injects air into the filter core through the pump and the air pipe, and the two clamping plates are both provided with sealing soft pads to improve the sealing performance. Then, the mounting plate is lowered by starting the air cylinder, and the filter core is sent into the water tank. The airtightness detection is realized by checking whether there are bubbles. However, the above-mentioned airtightness detection device has the following usage limitations: the observation of bubbles is by visual method, and the bubbles are generally small, which may not be easily detected by eyes, resulting in inaccurate results. Therefore, further improvement is needed for the existing technology. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to provide an airtightness detection device for improving the accuracy of bubble detection.

[0006] The technical solution adopted by the utility model to solve the above technical problem is: an airtightness detection device, which comprises:

[0007] a water tank for storing liquid;

[0008] a mounting seat for mounting the workpiece to be detected;

[0009] a ventilation mechanism arranged on the mounting seat and connected with the workpiece to be detected, for ventilating the workpiece to be detected;

[0010] a driving mechanism connected with the workpiece to be detected or the mounting seat for driving, for lifting the mounting seat or the water tank, so that the workpiece to be detected is in the liquid in the water tank or leaves the liquid in the water tank;

[0011] characterized in that it further comprises:

[0012] a camera arranged on the mounting seat;

[0013] at least one mirror arranged on the mounting seat and arranged outside the detection area of the workpiece to be detected, the mirror being used to reflect the bubble condition in the liquid around the detection area of the workpiece to be detected to the camera;

[0014] a controller connected with the camera and configured to obtain the air tightness detection result of the workpiece to be detected according to the image captured by the camera.

[0015] In order to prevent the camera from being flooded, the position of the camera is higher than the detection area of the workpiece to be detected, and the camera is configured to be always exposed to the liquid in the water tank. Of course, the camera can also be made of waterproof material.

[0016] In order to press the workpiece to be detected tightly to ensure the detection accuracy, the mounting seat is a square frame, the frame is open in front and back, the frame includes upper and lower plates distributed in upper and lower directions, the surface of the lower plate has a positioning seat for positioning the workpiece to be detected, the surface of the upper plate has a first driving member, the surface of the upper plate has a first through hole for the power output shaft of the first driving member to pass through, the frame is provided with a pressing plate connected with the first driving member, the pressing plate is arranged above the workpiece to be detected, and the pressing plate can press the workpiece to be detected under the action of the first driving member.

[0017] The ventilation mechanism has many structures, preferably, the ventilation mechanism includes a pneumatic connector, a sliding block and a second driving member, the pneumatic connector is connected with the sliding block, the sliding block is drivingly connected with the power output shaft of the second driving member, and the sliding block can approach the workpiece to be detected under the driving of the second driving member, so that the pneumatic connector can be docked with the ventilation position of the workpiece to be detected.

[0018] In order to achieve stable movement of the slider, the lower plate is also provided with a shaft extending along the power output shaft of the second driving member and a support for constraining one end of the shaft, and the other end of the shaft is connected to the slider.

[0019] Preferably, the support has a limiting groove extending along the power output shaft of the second driving member, and the shaft is constrained within the limiting groove.

[0020] In order to ensure that the camera is positioned higher than the inspection area of ​​the workpiece being inspected, the lower plate has a fixing bracket for fixing the second driving component, and the camera is located at the top of the fixing bracket.

[0021] To improve the accuracy of airtightness testing, two reflectors are provided, each located on the side of the lower plate opposite the camera, with the two reflectors extending in intersecting directions.

[0022] Preferably, the drive mechanism includes a third drive member, the power output shaft of which is drivenly connected to the mounting base.

[0023] To enable the third driving component to be driven and connected to the mounting base, the power output shaft of the third driving component is arranged vertically, the third driving component is constrained to the outside of the water tank, and a lifting plate is connected to the side wall of the frame, and the power output shaft of the third driving component is connected to the lifting plate.

[0024] Compared with the prior art, the advantages of this utility model are as follows: by arranging a reflector on the outer periphery of the area to be tested of the workpiece, the reflector can reflect the bubble situation in the liquid surrounding the area to be tested of the workpiece to the camera. Therefore, the camera can capture the bubble image on the outer periphery of the area to be tested of the workpiece. Thus, the airtightness test result of the workpiece can be obtained by image analysis. This detection device does not require manual intervention, reduces the occurrence of missed and false judgments, improves the accuracy of the test results, and saves manpower. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the airtightness detection device in an embodiment of the present invention;

[0026] Figure 2 for Figure 1 Another perspective structural diagram;

[0027] Figure 3 for Figure 1 A partial schematic diagram of the results;

[0028] Figure 4 for Figure 1 A sectional view. Detailed Implementation

[0029] The utility model is further described in detail below with reference to the drawings.

[0030] As Figures 1 to 4 shown, the air tightness detection device in the embodiment includes a water tank 1, a mounting seat 2, a ventilation mechanism 3, a driving mechanism 4, a camera 5, at least one mirror 6, and a controller. The workpiece a to be detected in the embodiment is a filter element, which has a position to be ventilated and a region to be detected. The region to be detected is a welding region close to the bottom of the filter element. Since the welding region is prone to air leakage, the embodiment mainly detects the air leakage of the welding region.

[0031] The water tank 1 is used to store liquid, which is usually water. In addition, in order to ensure the accuracy of detection, it is generally necessary to ensure that the water is free of impurities. The mounting seat 2 is used for mounting the workpiece a to be detected. The mounting seat 2 in the embodiment is a square frame, which is open at the front and back. The frame includes an upper plate 21 and a lower plate 22 distributed above and below. In addition, the frame also includes two side walls distributed on the left and right. The ventilation mechanism 3 is arranged on the mounting seat 2 and connected with the workpiece a to be detected, and is used to ventilate the workpiece a to be detected. The driving mechanism 4 is drivingly connected with the workpiece a to be detected or the mounting seat 2, and is used to lift the mounting seat 2 or the water tank 1, so that the workpiece a to be detected is in the liquid in the water tank 1 or leaves the liquid in the water tank 1. As Figure 2 shown, the top of the water tank 1 in the embodiment is open. As Figure 1 shown, the driving mechanism 4 in the embodiment is drivingly connected with the mounting seat 2, and is used to drive the mounting seat 2 to move up and down relative to the water tank 1.

[0032] As Figure 1 shown, the driving mechanism 4 includes a third driving member. The power output shaft of the third driving member is drivingly connected with the mounting seat 2. The third driving member in the embodiment is two, and is arranged on the left and right sides of the water tank 1. The third driving member is a cylinder. The power output shaft of the third driving member is arranged in the vertical direction. The third driving member is constrained on the outside of the water tank 1. The side wall of the frame is connected with a lifting plate 81. The power output shaft of the third driving member is connected with the lifting plate 81. In this way, the mounting seat 2 can move up and down relative to the water tank 1 under the driving of the third driving member. In addition, in order to make the lifting plate 81 move more smoothly, the embodiment also guides by means of a guide column. The guide column is a prior art, which will not be described here.

[0033] The surface of the lower plate 22 has a positioning seat 20 for positioning the workpiece a to be detected. The surface of the upper plate 21 has a first driving member 71. The surface of the upper plate 21 has a first through hole for the power output shaft of the first driving member 71 to pass through. The frame is provided with a pressing plate 8 connected with the first driving member 71. The pressing plate 8 is arranged above the workpiece a to be detected. The pressing plate 8 can press the workpiece a to be detected under the action of the first driving member 71. The first driving member 71 in the embodiment is a cylinder.

[0034] Camera 5 is mounted on mounting base 2; reflector 6 is mounted on mounting base 2 and arranged around the outer periphery of the area to be inspected of the workpiece a. Reflector 6 is used to reflect the air bubbles in the liquid surrounding the area to be inspected of the workpiece a back to camera 5. Controller is connected to camera 5 and configured to acquire the airtightness detection result of workpiece a based on the image captured by camera 5. In this embodiment, camera 5 is positioned higher than the area to be inspected of workpiece a, and camera 5 is configured to always remain exposed to the liquid in water tank 1. The image processing process of the controller in this embodiment is prior art, and this application does not improve the image processing process; therefore, it will not be elaborated further here.

[0035] like Figure 3 As shown, the ventilation mechanism 3 in this embodiment includes a pneumatic connector 31, a slider 32, and a second driving member 33. The pneumatic connector 31 is connected to the slider 32, and the slider 32 is driven by the power output shaft of the second driving member 33. The slider 32 can approach the workpiece a to be tested under the drive of the second driving member 33, thereby enabling the pneumatic connector 31 to align with the position of the workpiece a to be ventilated. Additionally, the lower plate 22 has a fixing bracket 221 for fixing the second driving member 33, and the camera 5 is located at the top of the fixing bracket 221. In this embodiment, the second driving member 33 is a cylinder, and the camera 5 is constrained to the top of the fixing bracket 221 by a bracket b. The camera angle of the camera 5 is adjustable, thus making the shooting results more accurate. Furthermore, there are two reflectors 6, both located on the lower plate 22 on the side opposite to the camera 5, and the extension directions of the two reflectors 6 intersect.

[0036] To ensure smooth sliding of the slider 32, the lower plate 22 in this embodiment is further provided with a shaft 34 extending along the power output shaft of the second driving member 33 and a support 35 constraining one end of the shaft 34. The other end of the shaft 34 is connected to the slider 32. The support 35 has a limiting groove 351 extending along the power output shaft of the second driving member 33, and the shaft 34 is constrained within the limiting groove 351. Figure 1 As shown, there are two shafts 34 in this embodiment, which are distributed on both sides of the second driving member 33.

[0037] The working process of the airtightness detection device in this embodiment is as follows:

[0038] A. Place the workpiece a to be tested on the positioning seat 20, and control the first driving member 71 to move so that the pressure plate 8 can press the workpiece a under the action of the first driving member 71.

[0039] B. Control the second driving member 33 to move so that the slider 32 can approach the workpiece a under the drive of the second driving member 33, thereby enabling the pneumatic connector 31 to dock with the position to be ventilated of the workpiece a.

[0040] C. The detected workpiece a is aerated through the pneumatic joint 31;

[0041] D. The third driving member is controlled to act, so that the mounting seat 2 is in the liquid of the water tank 1 under the driving of the third driving member (in this embodiment, it is required to ensure that the to-be-detected area of the detected workpiece a is in the liquid, but the camera 5 is not in the liquid);

[0042] E. The camera 5 collects the images around the to-be-detected area of the detected workpiece a at all times and transmits them into the controller, the controller processes the collected images, judges whether the front and back images are consistent, judges whether bubbles are generated, reminds that there is an abnormality if bubbles are generated, further inspection is required, if there is no abnormality, the water is discharged after pressure maintaining for a period of time, the mounting seat 2 is controlled to leave the liquid of the water tank, the detected workpiece a is taken out, and the detection of the next detected workpiece a is performed.

[0043] In the description and claims of the present application, terms are used to describe various example structures and elements of the present application as used by those skilled in the art are used to describe various example structures and elements of the present application as used by those skilled in the art. The use of these terms is intended to be illustrative only and in no way limiting. For example, the terms "front," "back," "bottom," "top," "side," "planar," "vertical," "horizontal," and the like can be used in conjunction with one example, but can be used to describe different examples.

Claims

1. Airtightness detection device, comprising: a water tank (1) for storing liquid; a mounting seat (2) for mounting a workpiece (a) to be detected; an aeration mechanism (3) provided on the mounting seat (2) and connected with the workpiece (a) to be detected, for aerating the workpiece (a) to be detected; a driving mechanism (4) drivingly connected with the workpiece (a) to be detected or the mounting seat (2), for lifting the mounting seat (2) or the water tank (1), so that the workpiece (a) to be detected is in or out of the liquid in the water tank (1); characterized in that it further comprises: a camera (5) provided on the mounting seat (2); at least one mirror (6) provided on the mounting seat (2) and arranged at the periphery of the area to be detected of the workpiece (a) to be detected, the mirror (6) being used for reflecting the bubble condition in the liquid around the periphery of the area to be detected of the workpiece (a) to be detected to the camera (5); a controller connected with the camera (5) and configured to obtain the airtightness detection result of the workpiece (a) to be detected according to the image taken by the camera (5).

2. The air tightness testing apparatus of claim 1, wherein: The camera (5) is located higher than the area to be detected of the workpiece (a) to be detected, and the camera (5) is configured to always be exposed to the liquid in the water tank (1).

3. The air tightness testing apparatus of claim 2, wherein: The mounting seat (2) is a square frame, the frame is open in front and back, the frame includes an upper plate (21) and a lower plate (22) distributed in upper and lower directions, the surface of the lower plate (22) has a positioning seat (20) for positioning the workpiece (a) to be detected, the surface of the upper plate (21) has a first driving member (71), the surface of the upper plate (21) has a first through hole for the power output shaft of the first driving member (71) to pass through, the frame is provided with a pressing plate (8) connected with the first driving member (71), the pressing plate (8) is arranged above the workpiece (a) to be detected, and the pressing plate (8) can press the workpiece (a) to be detected under the action of the first driving member (71).

4. The air tightness testing apparatus of claim 3, wherein: The aeration mechanism (3) includes a pneumatic connector (31), a sliding block (32) and a second driving member (33), the pneumatic connector (31) is connected with the sliding block (32), the sliding block (32) is drivingly connected with the power output shaft of the second driving member (33), and the sliding block (32) can approach the workpiece (a) to be detected under the driving of the second driving member (33), so that the pneumatic connector (31) can be docked with the position to be aerated of the workpiece (a) to be detected.

5. The air tightness testing apparatus of claim 4, wherein: The lower plate (22) is further provided with a shaft rod (34) arranged along the extension direction of the power output shaft of the second driving member (33) and a support (35) for constraining one end of the shaft rod (34), and the other end of the shaft rod (34) is connected with the sliding block (32).

6. The air tightness testing apparatus of claim 5, wherein: The support (35) has a limiting groove (351) extending along the extension direction of the power output shaft of the second driving member (33), and the shaft rod (34) is constrained in the limiting groove (351).

7. The air tightness testing apparatus of any one of claims 4 to 6, wherein: The lower plate (22) has a fixing frame (221) for fixing the second driving member (33), and the camera (5) is arranged at the top end of the fixing frame (221).

8. The air tightness testing apparatus of claim 7, wherein: The two reflectors (6) are arranged on the side of the lower plate (22) opposite to the camera (5), and the extending directions of the two reflectors (6) intersect.

9. The air tightness testing apparatus of claim 7, wherein: The driving mechanism (4) comprises a third driving member, and a power output shaft of the third driving member is drivingly connected with the mounting base (2).

10. The air tightness testing apparatus of claim 9, wherein: The power output shaft of the third driving member is arranged in the vertical direction, the third driving member is constrained to the outer side of the water tank (1), and the side wall of the frame is connected with a lifting plate (81), and the power output shaft of the third driving member is connected with the lifting plate (81).

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