An airtightness detection device and detection method for an ultrafiltration membrane element

Abstract

The present invention is applicable to the technical field of ultrafiltration membrane element detection, and provides an airtightness detection device for an ultrafiltration membrane element and a detection method thereof. The device includes a plugging assembly, an outer shell element is arranged at the middle position of the plugging assembly, a detection assembly is arranged on one side of the outer shell element, a set of inflation assemblies are respectively arranged on both sides of the plugging assembly, and a control assembly is arranged on the side of the plugging assembly away from the detection assembly. The plugging assembly includes two plugging mechanisms, and the two plugging mechanisms are respectively arranged at both ends of the outer shell element. By setting ultrasonic sensors, the air leakage points of the outer shell element can be accurately located. By directly detecting the weld seam of the outer shell element, when problems are detected, it can directly return to the welding station for welding treatment, which can not only accurately locate but also quickly repair, improving work efficiency. And through the air leakage points, the welding process can be further improved to improve welding efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrafiltration membrane element detection, and more specifically, it relates to an airtightness detection device for ultrafiltration membrane elements and a detection method thereof. Background Art

[0002] An ultrafiltration membrane element is a polymer semi-permeable membrane element used in the ultrafiltration process, which can separate macromolecular colloids or suspended particles of a certain size from a solution. The ultrafiltration membrane element usually consists of multiple key parts, each part having its specific function, jointly ensuring the efficient operation of the ultrafiltration process.

[0003] Currently, the ultrafiltration membrane element includes key components such as an ultrafiltration membrane, a housing, a seal, connecting pipe fittings, a support structure, and a water collection device. Among them, the main function of the housing is to protect the membrane element, prevent external physical damage and chemical erosion, and at the same time provide a stable operating environment for the membrane element. In actual applications, if the ultrafiltration membrane housing leaks air, external air may enter the inside of the membrane module, and the composition of the substances in contact with the membrane surface changes, which may cause problems such as oxidation and aging of the membrane, shortening the service life of the membrane element. Therefore, it is necessary to detect the airtightness of the ultrafiltration membrane housing element.

[0004] However, the existing airtightness detection of ultrafiltration membrane housing elements is generally carried out after the housing is manufactured. However, when detecting the airtightness after the housing is manufactured, if there are problems with the detection results, it will not only increase the difficulty of repair, but also, when reprocessing at the same position, it will weaken the pressure-bearing capacity of this part of the housing. For example, when the ultrafiltration membrane element housing is made of stainless steel, the processing process of the housing is relatively simple, mainly including rolling into a circle, welding, polishing, shaping, and roundness adjustment. Among them, only the main process of welding will affect its airtightness. If problems are detected after the roundness adjustment of the housing, at this time, welding needs to be carried out again to repair the air leakage point. Therefore, detecting the airtightness after the housing is manufactured will not only increase the complexity of the repair work, but also it is not easy to accurately locate the air leakage point. Now, an airtightness detection device for ultrafiltration membrane elements and a detection method thereof are proposed to improve the existing problems. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an airtightness detection device for ultrafiltration membrane elements and a detection method thereof.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An airtightness detection device for ultrafiltration membrane elements, including a plugging assembly, an outer shell element is arranged at the middle position of the plugging assembly, a detection assembly is arranged on one side of the outer shell element, a set of inflation assemblies are respectively arranged on both sides of the plugging assembly, and a control assembly is arranged on the side of the plugging assembly away from the detection assembly.

[0007] The plugging assembly includes two sets of plugging mechanisms, which are respectively arranged at both ends of the housing element, and both ends of the housing element are respectively adapted to the two sets of plugging mechanisms.

[0008] The plugging mechanism includes a connecting piece inflatable tube and a main body inflatable tube arranged on one side of the connecting piece inflatable tube.

[0009] The detection assembly includes a placement seat and a detection mechanism arranged on the top of the placement seat;

[0010] The detection mechanism includes a rotating ring and an ultrasonic sensor arranged on the inner wall of the rotating ring.

[0011] By adopting the above technology, the main body inflatable tube is respectively communicated with the inflation assembly, and the gas inside the inflation assembly can enter the interior of the housing element through the connecting piece inflatable tube and the main body inflatable tube. Also, because the connecting piece inflatable tube penetrates through the box body but does not penetrate through the plugging plate, that is, the two sets of connecting piece inflatable tubes can perform fixed-point inflation on both ends of the housing element respectively. In addition, the main body inflatable tube penetrates through the box body and the plugging plate in sequence. Therefore, the main body inflatable tube can inflate the main body part of the housing element. By setting the connecting piece inflatable tube and the main body inflatable tube, the requirement of fixed-point inflation can be met.

[0012] The present invention is further configured as: The plugging assembly further includes a first cylinder, a support frame is arranged at the bottom of the first cylinder, a set of sliding grooves are respectively opened on both sides of the support frame, an installation mechanism is arranged on one side of the support frame, the installation mechanism includes an installation plate, two sets of first sliders are arranged on one side of the installation plate, the two sets of first sliders are respectively slidably connected with the two sets of sliding grooves, the two sets of first sliders are fixedly connected with the installation plate, an installation block is arranged at the middle position between the two sets of first sliders, the installation block is fixedly connected with the installation plate, and the installation block is connected with the output end of the first cylinder.

[0013] The present invention is further configured as: A receiving plate is arranged at the bottom of the installation plate, the receiving plate is fixedly connected with the installation plate, two sets of second cylinders are arranged on the side of the installation plate away from the installation block, the output ends of the two sets of second cylinders are respectively connected with a set of first connecting blocks, a set of second sliders are respectively arranged on one side of the two sets of first connecting blocks, a set of connecting plates are respectively arranged at the bottoms of the two sets of second sliders, the two sets of connecting plates are connected with the two sets of second sliders, and the two sets of second sliders are respectively slidably connected with a set of first slide rails.

[0014] The present invention is further configured as: The plugging mechanism further includes a box body, a number of third cylinders are arranged on one side of the box body, the output ends of the number of third cylinders are connected with a plugging plate, the connecting piece inflatable tube penetrates through the box body, the main body inflatable tube penetrates through the box body and the plugging plate in sequence, and a winding mechanism is arranged inside the box body for winding the main body inflatable tube.

[0015] The present invention is further configured such that: the winding mechanism includes a housing, a material tray is disposed inside the housing, a winding motor is disposed on one side of the housing, an output end of the winding motor is connected to the material tray, an outlet pipe opening is formed on an outer sidewall of the housing, and a fillet is disposed on an inner sidewall of the outlet pipe opening.

[0016] By adopting the above-mentioned technology, the sealing of the housing component can be achieved by setting the sealing mechanism, and the housing component can be inflated in blocks, so as to achieve the purpose of spot detection of the housing component.

[0017] The present invention is further configured such that: the detection assembly includes a first electric slide rail, a second electric slide rail is disposed on top of the first electric slide rail, and the placement seat is disposed on top of the second electric slide rail.

[0018] By adopting the above-mentioned technology, the left and right positions of the detection mechanism can be adjusted by setting the first electric slide rail, the front and back positions of the detection mechanism can be adjusted by the second electric slide rail, the all-round detection of the housing component by the detection mechanism can be achieved, the detection requirements can be met, and the placement seat provides stable support for the detection mechanism during the movement of the detection mechanism.

[0019] The present invention is further configured such that: the detection mechanism further includes a transfer cylinder, an output end of the transfer cylinder is connected to a sliding block, the sliding block is slidably connected to the top of the placement seat, a placement plate is disposed on top of the sliding block, the placement plate is fixedly connected to the sliding block, a driving motor is disposed on one side of the placement plate, a first driving wheel is disposed below the driving motor, a first driven wheel is disposed above the first driving wheel, and a first belt is sleeved outside the first driven wheel and the first driving wheel.

[0020] The present invention is further configured such that: a second driving wheel is disposed on one side of the placement plate away from the first driving wheel, the second driving wheel and the first driving wheel are connected through a first output shaft, a second driven wheel is disposed above the second driving wheel, and the second driven wheel and the first driven wheel are connected through a second output shaft.

[0021] The present invention is further configured such that: an auxiliary wheel is disposed on the same side of the second driven wheel and the second driving wheel, a second belt is sleeved outside the second driving wheel, the second driven wheel and the auxiliary wheel, the rotating ring is disposed on a side of the second driven wheel and the second driving wheel away from the auxiliary wheel, a plurality of limiting wheels are disposed around the outside of the rotating ring, and a limiting member is disposed on a side of the rotating ring away from the second driven wheel.

[0022] By adopting the above technology, the air tightness of the shell components can be tested through the detection mechanism and the ultrasonic sensor. Since the three welds have different shapes, it is necessary to test the air tightness of the welds according to different situations. Among them, the first weld A and the third weld C are both arc-shaped, so the annular detection method is adopted, and the second weld B is strip-shaped, so the translation detection method is adopted. On the basis of translation detection, when testing the second weld B, it can also be assisted by annular detection, that is, if the second weld B appears to be arc-shaped and tilted, it can be detected by the annular detection method, thereby expanding the detection range; in addition, by setting a limit wheel and a limit member, the rotating ring can be operated in a track composed of several limit wheels to prevent the rotating ring from leaving the track during rotation.

[0023] A method for detecting an air tightness detection device for an ultrafiltration membrane element, using the air tightness detection device for an ultrafiltration membrane element as described above, comprises the following steps:

[0024] S1. First, the welded shell component is placed in the middle position of the plugging component by a robot, and the initial position of the shell component is determined.

[0025] S2. Secondly, after the position of the shell element is determined, the shell element is lifted up under the action of the blocking component to be opposite to the detection component, and the detection component is started. The detection component starts the outer side of the shell element and surrounds the shell element.

[0026] S3. Then, the inflation component is started, and the inflation component inflates air into the interior of the housing element. At this time, the detection component can detect the leakage of the housing element and locate the leakage point.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] (1) By setting up an ultrasonic sensor in conjunction with the detection mechanism, the leak point of the housing component can be accurately located. After the leak point is detected, it can be directly returned to the welding station for welding processing, which can not only accurately locate the leak, but also quickly repair it, thereby improving work efficiency. In addition, the welding process can be further improved through the leak point to improve welding efficiency.

[0029] (2) By setting the first cylinder, the mounting mechanism, the blocking mechanism, and the visual detection sensor to work in coordination, the position of the housing element can be adjusted so that the housing element is compatible with the detection component to meet the detection requirements.

[0030] (3) By setting up two sets of blocking mechanisms, in addition to sealing the shell components, the two sets of blocking mechanisms also stably clamp the shell components, thereby reducing the shaking of the shell components during detection, thereby reducing the impact on the detection results.

[0031] (4) By setting the third cylinder, the inflation range can be adjusted. Under the action of the third cylinder, the position of the plugging plate can be adjusted. That is, the inflation range can be determined by two groups of plugging plates, and then the detection range can be determined. This not only increases the detection accuracy but also shortens the detection time. In addition, to meet the adjustment of the position of the plugging plate, the retraction and extension of the main body inflation pipe need to be set so that the length of the main body inflation pipe can be adjusted at any time to meet the purpose of block-by-block detection. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of an airtightness detection device and its detection method for an ultrafiltration membrane element in the present invention.

[0033] Figure 2 In the present invention Figure 1 isometric view.

[0034] Figure 3 It is a schematic structural diagram of the plugging assembly in the present invention.

[0035] Figure 4 In the present invention Figure 3 isometric view.

[0036] Figure 5 In the present invention Figure 2 is a schematic enlarged structural diagram of area D.

[0037] Figure 6 It is a schematic structural diagram of the plugging mechanism in the present invention.

[0038] Figure 7 In the present invention Figure 6 front view.

[0039] Figure 8 It is a schematic partial structural diagram of the plugging mechanism in the present invention.

[0040] Figure 9 It is a schematic partial structural diagram of the winding mechanism in the present invention.

[0041] Figure 10 It is a schematic structural diagram of the detection mechanism in the present invention.

[0042] Figure 11 In the present invention Figure 10 isometric view.

[0043] Figure 12 It is a schematic structural diagram of the housing element in the present invention.

[0044] Figure 13 It is a schematic working method flow diagram of the detection device in the present invention.

[0045] Description of reference numerals: 1. Plugging assembly; 11. First cylinder; 12. Support frame; 13. Mounting mechanism; 131. Mounting plate; 132. Second cylinder; 133. First connecting block; 134. First slide rail; 135. Connecting plate; 136. Bearing plate; 137. First slider; 138. Mounting block; 139. Second slider; 14. Plugging mechanism; 141. Box body; 142. Connector charging pipe; 143. Main body charging pipe; 144. Third cylinder; 145. Plugging plate; 146. Winding mechanism; 1461. Housing; 1462. Reel; 1463. Winding motor; 1464. Outlet pipe

[0046] 2. Outer shell element

[0047] 3. Detection assembly; 31. First electric slide rail; 32. Second electric slide rail; 33. Placing seat; 34. Detection mechanism; 341. Transfer cylinder; 342. Sliding block; 343. Placing plate; 344. Driving motor; 345. First driving wheel; 346. First driven wheel; 347. First belt; 348. Second driving wheel; 349. Second driven wheel; 3401. Second belt; 3402. Limiting wheel; 3403. Rotating ring; 3404. Auxiliary wheel; 3405. Limiting member; 35. Ultrasonic sensor

[0048] 4. Inflation assembly

[0049] 5. Control assembly Detailed implementation manners

[0050] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0051] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0052] Please refer to Figures 1-13 , the present invention provides the following technical solutions:

[0053] Embodiment 1, an airtightness detection device for an ultrafiltration membrane element, includes a plugging assembly 1. An outer shell element 2 is arranged at the middle position of the plugging assembly 1. A detection assembly 3 is arranged on one side of the outer shell element 2. A set of inflation assemblies 4 are respectively arranged on both sides of the plugging assembly 1. A control assembly 5 is arranged on the side of the plugging assembly 1 away from the detection assembly 3.

[0054] Among them, the plugging component 1 is used to assist the normal progress of the detection work. The housing component 2 is the component to be tested. The detection component 3 is an airtightness detection device. The inflation component 4 is used to provide the required air pressure for the detection work. The control component 5 is used to control the progress of the detection work.

[0055] The control component 5 includes a control panel and a control system. Various control buttons are set on the control panel. The control system mainly processes corresponding information according to the received information.

[0056] The inflation component 4 includes a pressure controller. The pressure controller can set the pressure value inside the housing component 2, and make the pressure inside the housing component 2 reach and maintain the set pressure by controlling the pressurizing equipment, so as to carry out airtightness detection under stable pressure conditions.

[0057] In practical applications, the main function of the housing component 2 is to protect the membrane component, prevent external physical damage and chemical erosion, and at the same time provide a stable operating environment for the membrane component. Therefore, it is necessary to carry out airtightness detection on the housing component 2. Good airtightness can reduce the influence of external air on the internal membrane component. The leakage points of the airtightness of the housing component 2 itself mainly appear at the welds. Therefore, the airtightness detection of the housing component 2 can be transformed into the airtightness detection of the welds of the housing component 2.

[0058] By directly detecting the welds of the housing component 2, when problems are detected, it can be directly returned to the welding station for welding treatment, which can not only accurately locate but also quickly repair, improving work efficiency. And the welding process can be further improved through the leakage points, improving the welding efficiency.

[0059] Refer to Figure 12 , considering the function of the housing component 2 itself and the connected relationship, the housing component 2 is provided with multiple welds. Specifically, a space for placing the membrane component is provided inside the housing component 2. The placement space is the main part of the housing component 2. The main part of the housing component 2 is formed by the rolling method. At the same time, installation spaces for various seals need to be provided at both ends of the housing component 2. The installation spaces for the seals are provided by the connecting parts at both ends. The connecting parts at both ends are divided into a first connecting part and a second connecting part.

[0060] Refer to Figure 12 , therefore, the surface of the housing component 2 mainly involves three welds, namely: the first weld A, the first weld B, and the first weld C. Among them, the first weld A is the weld formed when the main part of the housing component 2 is welded to the first connecting part. The first weld A is set in a circular ring shape. The second weld B is the weld formed after the main part is rolled and welded. The second weld B is set in a strip shape. The third weld C is the weld formed when the main part of the housing component 2 is welded to the second connecting part. The third weld C is set in a circular ring shape.

[0061] To achieve the airtightness detection of the housing component 2, it is necessary to set the details of the plugging assembly 1. The specific structure of the plugging assembly 1 is as follows:

[0062] Refer to Figures 1-5 , the plugging assembly 1 includes two groups of plugging mechanisms 14, which are respectively arranged at both ends of the housing component 2, and both ends of the housing component 2 are respectively adapted to the two groups of plugging mechanisms 14.

[0063] Refer to Figures 1-5 , the plugging assembly 1 further includes a first cylinder 11. A support frame 12 is arranged at the bottom of the first cylinder 11, and an installation mechanism 13 is arranged on one side of the support frame 12.

[0064] In actual detection work, the housing component 2 needs to be adjusted so that the position of the housing component 2 is opposite to the detection component 3. In order to achieve the position adjustment of the housing component 2, the installation mechanism 13 is specifically and detailedly set.

[0065] The specific structure of the installation mechanism 13 is as follows:

[0066] Refer to Figures 1-5 , the installation mechanism 13 includes an installation plate 131. Two groups of first sliders 137 are arranged on one side of the installation plate 131. One group of chutes is respectively opened on both sides of the support frame 12. The two groups of first sliders 137 are respectively slidably connected with the two groups of chutes. The two groups of first sliders 137 are fixedly connected with the installation plate 131. An installation block 138 is arranged at the middle position of the two groups of first sliders 137. The installation block 138 is fixedly connected with the installation plate 131. The installation block 138 is connected with the output end of the first cylinder 11.

[0067] Refer to Figures 1-5 , a receiving plate 136 is arranged at the bottom of the installation plate 131. The receiving plate 136 is fixedly connected with the installation plate 131. Two groups of second cylinders 132 are arranged on the side of the installation plate 131 away from the installation block 138. The output ends of the two groups of second cylinders 132 are respectively connected with a group of first connection blocks 133. One group of second sliders 139 is respectively arranged on one side of the two groups of first connection blocks 133. One group of connecting plates 135 is respectively arranged at the bottoms of the two groups of second sliders 139. The two groups of connecting plates 135 are connected with the two groups of second sliders 139. The two groups of second sliders 139 are respectively slidably connected with a group of first slide rails 134.

[0068] Refer to Figures 1-5 , two groups of limit seats are arranged at the top of the receiving plate 136. The two groups of limit seats are adapted to both ends of the housing component 2, and the limit seats can limit the housing component 2.

[0069] The two plugging mechanisms 14 are respectively fixedly connected to the two connecting plates 135, and the two plugging mechanisms 14 are arranged oppositely.

[0070] The specific operation process of the plugging assembly 1 is as follows:

[0071] First, the welded housing element 2 can be placed at the positions of the two limit seats by a manipulator, and the limit seats perform preliminary positioning on the housing element 2.

[0072] Then, start the two second cylinders 132. The two second cylinders 132 respectively drive their corresponding first connecting blocks 133. Driven by the two first connecting blocks 133, the two second sliders 139 respectively move along the two first sliding rails 134. The two connecting plates 135 fixedly connected to the two second sliders 139 move with the two second sliders 139. At the same time, the two plugging mechanisms 14 move with the two connecting plates 135 until the two plugging mechanisms 14 plug the two ends of the housing element 2. At this time, in addition to plugging the housing element 2, the two plugging mechanisms 14 also stably clamp the housing element 2, reducing the shaking of the housing element 2 during detection, and thus reducing the impact on the detection results.

[0073] Furthermore, after the placement position of the housing element 2 is determined, start the first cylinder 11. Driven by the first cylinder 11, the two first sliders 137 respectively move along the two chutes. At this time, the mounting plate 131 fixedly connected to the two first sliders 137 moves with the first sliders 137. At the same time, because the mounting plate 131 is fixedly connected to the receiving plate 136, the receiving plate 136 moves with the mounting plate 131. That is, by starting the first cylinder 11, the lifting of the receiving plate 136 can be realized. Also, because the housing element 2 is placed above the receiving plate 136, the housing element 2 is plugged by the two plugging mechanisms 14, and the two plugging mechanisms 14 are respectively connected to the two connecting plates 135. Then, driven by the first cylinder 11, the overall lifting of the mounting mechanism 13 can be realized, and thus the position adjustment of the housing element 2 can be realized.

[0074] By setting the coordinated work of the first cylinder 11, the mounting mechanism 13, and the plugging mechanism 14, the position adjustment of the housing element 2 can be realized, so that the housing element 2 is adapted to the detection component 3 to meet the detection requirements.

[0075] The housing element 2 can realize position adjustment driven by the plugging assembly 1. After the position is adjusted, it is necessary to set the detection component 3 to detect the housing element 2. The specific structure of the detection component 3 is as follows:

[0076] Refer to Figure 1 and Figure 2 , the detection component 3 includes a placement seat 33 and a detection mechanism 34 arranged on the top of the placement seat 33.

[0077] Refer to Figure 1 and Figure 2 , the detection component 3 includes a first electric slide rail 31, a second electric slide rail 32 is arranged on the top of the first electric slide rail 31, and a placement seat 33 is arranged on the top of the second electric slide rail 32.

[0078] By setting the first electric slide rail 31, the left - right position adjustment of the detection mechanism 34 can be realized, and by setting the second electric slide rail 32, the front - back position adjustment of the detection mechanism 34 can be realized, so that the all - round detection of the housing component 2 by the detection mechanism 34 can be realized, meeting the detection requirements. During the movement of the detection mechanism 34, the placement seat 33 provides stable support for the detection mechanism 34.

[0079] Through the above structure, the basic detection device of the detection component 3 can be designed. However, for the placement position of the sensor and the detailed parts of the specific detection structure, further settings are required. Therefore, the detailed parts of the installation mechanism 13 need to be designed. The specific structure of the installation mechanism 13 is as follows:

[0080] Refer to Figure 10 and Figure 11 , the detection mechanism 34 includes a rotating ring 3403 and an ultrasonic sensor 35 arranged on the inner wall of the rotating ring 3403.

[0081] By setting the ultrasonic sensor 35, the detection of air leakage points can be realized. When gas leaks from the leakage point of the housing component 2, a high - speed jet of air flow will be formed. This air flow will generate turbulence and vibration at the leakage port, thus exciting ultrasonic signals, which are then received and processed by the ultrasonic sensor 35, thereby realizing the detection of leakage points.

[0082] Refer to Figure 10 and Figure 11 , the detection mechanism 34 further includes a transfer cylinder 341. The output end of the transfer cylinder 341 is connected with a sliding block 342. The sliding block 342 is slidably connected to the top of the placement seat 33. A placement plate 343 is arranged on the top of the sliding block 342. The placement plate 343 is fixedly connected to the sliding block 342. A driving motor 344 is arranged on one side of the placement plate 343. A first driving wheel 345 is arranged below the driving motor 344. A first driven wheel 346 is arranged above the first driving wheel 345. A first belt 347 is sleeved on the outer sides of the first driven wheel 346 and the first driving wheel 345.

[0083] Refer to Figure 10 and Figure 11 , the output end of the driving motor 344 is connected with a speed reducer, and the output end of the speed reducer is connected with the first driving wheel 345. Therefore, when the driving motor 344 is started, the driving motor 344 can drive the first driving wheel 345 to rotate.

[0084] Refer to Figure 10 and Figure 11 Figure 11 On the side of the placement plate 343 away from the first driving wheel 345, a second driving wheel 348 is provided. The second driving wheel 348 and the first driving wheel 345 are connected through the first output shaft. Above the second driving wheel 348, a second driven wheel 349 is provided. The second driven wheel 349 and the first driven wheel 346 are connected through the second output shaft.

[0085] Refer to Figure 10 and Figure 11 Figure 11 On the same side of the second driven wheel 349 and the second driving wheel 348, an auxiliary wheel 3404 is provided. A second belt 3401 is sleeved outside the second driving wheel 348, the second driven wheel 349, and the auxiliary wheel 3404. A rotating ring 3403 is arranged on the side of the second driven wheel 349 and the second driving wheel 348 away from the auxiliary wheel 3404. A number of limiting wheels 3402 are arranged around the outside of the rotating ring 3403. A limiting member 3405 is arranged on the side of the rotating ring 3403 away from the second driven wheel 349.

[0086] The limiting member 3405 is fixedly connected to the placement plate 343. And on one side of the limiting member 3405, a visual detection sensor is provided. The visual detection sensor can determine the position of the housing element 2 and transmit the position information of the housing element 2 to the control system. The control system then controls the first cylinder 11, and the first cylinder 11 then drives the housing element 2 to be lifted to a position opposite to the detection assembly 3.

[0087] By providing the limiting wheels 3402 and the limiting member 3405, the rotating ring 3403 can run within the track composed of a number of limiting wheels 3402, avoiding the rotating ring 3403 from getting out of the track during rotation.

[0088] The operation process of the detection assembly 3 is as follows:

[0089] Start the first electric slide rail 31. The detection mechanism 34 gradually moves within the detection range of the second weld B driven by the first electric slide rail 31. At the same time, when the housing element 2 is placed inside the two groups of limit seats by the manipulator and is firmly clamped by the blocking mechanism 14, then start the first cylinder 11. The first cylinder 11 gradually lifts the housing element 2. Under the action of the visual detection sensor, when the housing element 2 is opposite to the detection assembly 3, the first cylinder 11 stops working and the position of the housing element 2 is determined.

[0090] After the position of the housing element 2 is determined, the second electric slide rail 32 is started. The second electric slide rail 32 drives the detection mechanism 34 to gradually move forward. After the approximate position is determined, the transfer cylinder 341 is started. The transfer cylinder 341 drives the placement plate 343 to move, and the position of the fine-tuning rotating ring 3403 is adjusted until the rotating ring 3403 surrounds the housing element 2. Thus, the position of the detection component 3 is determined.

[0091] After the positions of both the housing element 2 and the detection component 3 are determined, two sets of inflation components 4 are required to inflate the interior of the housing element 2. Since the housing element 2 is blocked by two sets of blocking mechanisms 14, and the two sets of blocking mechanisms 14 are respectively connected and communicated with the two sets of inflation components 4. When the inflation component 4 inflates the housing element 2, the gas can enter the interior of the housing element 2 through the blocking mechanism 14. After the inflation is completed, it is detected by the ultrasonic sensor 35. Since the three weld shapes are different, the airtightness of the welds needs to be detected in different cases. Among them, the first weld A and the third weld C are both arc-shaped, so the annular detection method is adopted. The second weld B is strip-shaped, so the translation detection method is adopted.

[0092] The process of the annular detection method is as follows:

[0093] Start the drive motor 344. The drive motor 344 drives the first drive wheel 345 to rotate. Driven by the first belt 347, the first driven wheel 346 rotates following the first drive wheel 345. The first drive wheel 345 and the first driven wheel 346 respectively drive the second drive wheel 348 and the second driven wheel 349 to rotate. Also, because driven by the second belt 3401, the auxiliary wheel 3404 rotates following the second drive wheel 348 and the second driven wheel 349. Under the action of the second drive wheel 348, the second driven wheel 349, the auxiliary wheel 3404 and the second belt 3401, the rotating ring 3403 can be driven to rotate within the range surrounded by several limiting wheels 3402. Also, because the ultrasonic sensor 35 is arranged on the inner wall of the rotating ring 3403, the ultrasonic sensor 35 can rotate following the rotating ring 3403, thereby realizing the annular detection of the weld.

[0094] The process of the translation detection method is as follows:

[0095] Start the second electric slide rail 32. The second electric slide rail 32 can drive the detection mechanism 34 to achieve left-right translation. Driven by the second electric slide rail 32, the ultrasonic sensor 35 follows the detection mechanism 34 to achieve translation. Therefore, the ultrasonic sensor 35 can achieve the translation detection of the strip-shaped weld. At the same time, on the basis of the translation detection, when detecting the second weld B, annular detection can also be assisted. That is, if the second weld B shows an arc-shaped inclination, the annular detection method can be used for detection, expanding the detection range.

[0096] By setting the ultrasonic sensor 35 to cooperate with the detection mechanism 34, the air leakage points of the housing component 2 can be accurately positioned. After detecting the air leakage points, it can directly return to the welding station for welding treatment, which can not only accurately position but also quickly repair, improving work efficiency. And through the air leakage points, the welding process can be further improved to increase the welding efficiency.

[0097] Embodiment 2: The ultrasonic sensor 35 can be used to separately detect the first weld A, the second weld B, and the third weld C. However, since there is no gas separation inside the housing component 2, if there are multiple leakage points in the housing component 2 and the leakage points are far apart, the gas inside the housing component 2 will leak, and the internal air pressure of the housing component 2 cannot be maintained at the same level for a long time. At the same time, it takes a certain amount of time for the ultrasonic sensor 35 to reach the detection point. Therefore, in this case, the detection time of the ultrasonic sensor 35 is increased, reducing the detection efficiency.

[0098] Refer to Figure 1 , for this reason, the plugging mechanism 14 has been designed in detail for the air inflation problem inside the housing component 2. The plugging mechanism 14 realizes fixed-point air inflation inside the housing component 2. The specific structure of the plugging mechanism 14 is as follows:

[0099] Refer to Figures 6-9 , the plugging mechanism 14 includes a connecting piece air charging pipe 142 and a main body air charging pipe 143 arranged on one side of the connecting piece air charging pipe 142.

[0100] Refer to Figures 6-9 , the plugging mechanism 14 further includes a box body 141. A number of third cylinders 144 are arranged on one side of the box body 141. The output ends of the number of third cylinders 144 are connected to a plugging plate 145. The connecting piece air charging pipe 142 penetrates through the box body 141, and the main body air charging pipe 143 penetrates through the box body 141 and the plugging plate 145 in sequence.

[0101] Refer to Figures 6-9 , the main body air charging pipe 143 is respectively communicated with the air inflation component 4. The gas inside the air inflation component 4 can enter the inside of the housing component 2 through the connecting piece air charging pipe 142 and the main body air charging pipe 143. And because the connecting piece air charging pipe 142 penetrates through the box body 141 but does not penetrate through the plugging plate 145, that is, the two groups of connecting piece air charging pipes 142 can perform fixed-point air inflation on both ends of the housing component 2 respectively. In addition, the main body air charging pipe 143 penetrates through the box body 141 and the plugging plate 145 in sequence. Therefore, the main body air charging pipe 143 can inflate the main body part of the housing component 2. By setting the connecting piece air charging pipe 142 and the main body air charging pipe 143, the demand for fixed-point air inflation can be met.

[0102] The main body part of the outer shell component 2 is relatively long. If the main body part is inflated only once, it will still increase the detection time of the ultrasonic sensor 35. Therefore, the inflation range can be adjusted by setting the third cylinder 144. Under the action of the third cylinder 144, the position of the sealing plate 145 can be adjusted. That is, the inflation range can be determined by the two groups of sealing plates 145, and then the detection range can be determined, which not only improves the detection accuracy but also shortens the detection time.

[0103] To meet the adjustment of the position of the sealing plate 145, it is necessary to set the retraction and extension of the main body inflation pipe 143 so that the length of the main body inflation pipe 143 can be adjusted at any time to meet the purpose of block detection.

[0104] For this reason, a winding mechanism 146 is arranged inside the box body 141, and the winding mechanism 146 is used for winding the main body inflation pipe 143.

[0105] The specific structure of the winding mechanism 146 is as follows:

[0106] Refer to Figures 6-9 , the winding mechanism 146 includes a housing 1461. A reel 1462 is arranged inside the housing 1461. A winding motor 1463 is arranged on one side of the housing 1461. The output end of the winding motor 1463 is connected to the reel 1462. An outlet pipe orifice 1464 is formed on the outer side wall of the housing 1461, and a fillet is arranged on the inner side wall of the outlet pipe orifice 1464.

[0107] The detection process is as follows:

[0108] After the positions of the outer shell component 2 and the detection component 3 are determined, the sealing plate 145 at the first connecting piece and the box body 141 seal the first connecting piece to form an inflation space for airtightness detection. Then, the inside of the first connecting piece is inflated through the connecting piece inflation pipe 142 at the first connecting piece. At this time, the ultrasonic sensor 35 cooperates with the detection mechanism 34 to perform airtightness detection on the first weld A.

[0109] After the detection of the first weld A is completed, the third cylinder 144 is started. The third cylinder 144 drives the sealing plate 145 at the second connecting piece to move to a position close to the first connecting piece. At this time, the two groups of sealing plates 145 form an inflation space. Then, the space is inflated through the main body inflation pipe 143. The ultrasonic sensor 35 cooperates with the detection mechanism 34 to start airtightness detection on the inflation space of the second weld B. Subsequently, the two groups of sealing plates 145 gradually move towards the position of the second connecting piece under the drive of their respective third cylinders 144. During the movement, the size of the inflation space formed by the two groups of sealing plates 145 remains unchanged, and the position of the inflation space changes. At the same time, the ultrasonic sensor 35 and the detection mechanism 34 cooperate with the movement of the two groups of sealing plates 145 to gradually complete all detections of the second weld B, achieving the purpose of comprehensive detection of the second weld B.

[0110] After the detection of the second weld B is completed, the airtightness of the third weld C at the second connecting member is then detected. At this time, the plugging plate 145 at the second connecting member and the box body 141 block the second connecting member to form an inflation space for airtightness detection. Then, air is inflated into the second connecting member through the connecting member air inlet pipe 142 at the second connecting member. At this time, the ultrasonic sensor 35 cooperates with the detection mechanism 34 to detect the airtightness of the third weld C.

[0111] Embodiment 3, refer to Figure 13 , a detection method for an airtightness detection device of an ultrafiltration membrane element, using the above-mentioned airtightness detection device for an ultrafiltration membrane element, including the following steps:

[0112] S1. First, the welded shell element 2 is placed at the middle position of the plugging assembly 1 by a manipulator to determine the initial position of the shell element 2.

[0113] S11. First, the welded shell element 2 can be placed at the positions of the two limit seats by a manipulator, and the limit seats perform preliminary positioning on the shell element 2.

[0114] S12. Then, start the two second cylinders 132. The two second cylinders 132 respectively drive their corresponding first connection blocks 133. Driven by the two first connection blocks 133, the two second sliders 139 respectively move along the two first slide rails 134. The two connecting plates 135 fixedly connected to the two second sliders 139 move with the two second sliders 139. At the same time, the two plugging mechanisms 14 move with the two connecting plates 135 until the two plugging mechanisms 14 block the two ends of the shell element 2.

[0115] S13. Further, after the placement position of the shell element 2 is determined, start the first cylinder 11. Driven by the first cylinder 11, the two first sliders 137 respectively move along the two chutes. At this time, the mounting plate 131 fixedly connected to the two first sliders 137 moves with the first sliders 137. At the same time, because the mounting plate 131 is fixedly connected to the receiving plate 136, the receiving plate 136 moves with the mounting plate 131. That is, by starting the first cylinder 11, the lifting of the receiving plate 136 can be realized. Also, because the shell element 2 is placed above the receiving plate 136, the shell element 2 is blocked by the two plugging mechanisms 14, and the two plugging mechanisms 14 are respectively connected to the two connecting plates 135. Then, the overall lifting of the mounting mechanism 13 can be realized under the drive of the first cylinder 11, that is, the position adjustment of the shell element 2 is realized.

[0116] S2. Secondly, after the position of the shell element 2 is determined, the shell element 2 is lifted under the action of the plugging assembly 1 to face the detection assembly 3. Start the detection assembly 3, and the detection assembly 3 starts outside the shell element 2 and surrounds the shell element 2.

[0117] S21. Secondly, after the position of the housing element 2 is determined, start the first electric slide rail 31. Driven by the first electric slide rail 31, the detection mechanism 34 gradually moves into the detection range of the second weld B.

[0118] S22. Then start the first cylinder 11. The first cylinder 11 gradually lifts the housing element 2. Under the action of the visual detection sensor, when the housing element 2 is opposite to the detection assembly 3, the first cylinder 11 stops working and the position of the housing element 2 is determined.

[0119] S23. After the position of the housing element 2 is determined, start the second electric slide rail 32. The second electric slide rail 32 drives the detection mechanism 34 to gradually move forward. After the approximate position is determined, start the transfer cylinder 341. Drive the placement plate 343 to move through the transfer cylinder 341, and fine-tune the position of the rotating ring 3403 until the rotating ring 3403 surrounds the housing element 2.

[0120] S3. Then, start the inflation assembly 4. The inflation assembly 4 inflates the housing element 2. At this time, the detection assembly 3 can detect the leakage condition of the housing element 2 and locate the leakage point.

[0121] S31. Then, after the positions of the housing element 2 and the detection assembly 3 are determined, inflate one end of the housing element 2 first. More specifically, inflate inside the first connector through the connecting pipe 142 of the connector. At this time, the ultrasonic sensor 35 cooperates to perform airtightness detection on the first weld A.

[0122] S32. After the detection of the first weld A is completed, start the third cylinder 144. The third cylinder 144 drives the plugging plate 145 at the second connector to move to a position close to the first connector. At this time, the two plugging plates 145 form an inflation space. Then inflate into the space through the main inflation pipe 143. The ultrasonic sensor 35 cooperates to start airtightness detection on the first detection range of the second weld B. Subsequently, the two plugging plates 145 gradually move driven by their respective third cylinders 144, and at the same time the ultrasonic sensor 35 cooperates with them to gradually complete all detections of the second weld B.

[0123] S33. After the detection of the second weld B is completed, perform airtightness detection on the third weld C at the second connector. The steps for airtightness detection of the third weld C are the same as those in S31.

[0124] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. An ultrafiltration membrane element air tightness detection device, characterized in that: It comprises a blocking component (1), a housing component (2) is arranged in the middle of the blocking component (1), a detection component (3) is arranged on one side of the housing component (2), a group of inflation components (4) are arranged on both sides of the blocking component (1), and a control component (5) is arranged on the side of the blocking component (1) away from the detection component (3); The blocking component (1) comprises two groups of blocking mechanisms (14), the two groups of blocking mechanisms (14) being respectively arranged at two ends of the housing element (2), and the two ends of the housing element (2) are respectively adapted to the two groups of blocking mechanisms (14); The blocking mechanism (14) comprises a connecting piece inflation tube (142) and a main body inflation tube (143) arranged on one side of the connecting piece inflation tube (142); The blocking mechanism (14) further comprises a box body (141), a plurality of third cylinders (144) are arranged on one side of the box body (141), output ends of the plurality of third cylinders (144) are connected to a blocking plate (145), the connecting piece air-inflating tube (142) is arranged to penetrate the box body (141), the main body air-inflating tube (143) is arranged to penetrate the box body (141) and the blocking plate (145) in sequence, and a winding mechanism (146) is arranged inside the box body (141), and the winding mechanism (146) is used to wind up the main body air-inflating tube (143); The inflation range can be adjusted by setting a third air cylinder (144), and the position of the blocking plate (145) can be adjusted under the action of the third air cylinder (144), so that the inflation range can be determined by two sets of blocking plates (145), thereby determining the detection range; The detection assembly (3) comprises a placement seat (33) and a detection mechanism (34) arranged on the top of the placement seat (33); The detection assembly (3) comprises a first electric slide rail (31), a second electric slide rail (32) is arranged on the top of the first electric slide rail (31), and the placement seat (33) is arranged on the top of the second electric slide rail (32); By providing a first electric slide rail (31), the left-right position of the detection mechanism (34) can be adjusted, and the second electric slide rail (32) can be adjusted fore-and-aft position of the detection mechanism (34); The detection mechanism (34) comprises a rotating ring (3403) and an ultrasonic sensor (35) arranged on the inner wall of the rotating ring (3403).

2. The air tightness detection device for ultrafiltration membrane elements according to claim 1, characterized in that: The blocking assembly (1) further comprises a first cylinder (11), a support frame (12) being provided at the bottom of the first cylinder (11), a group of slide grooves being respectively provided on both sides of the support frame (12), a mounting mechanism (13) being provided on one side of the support frame (12), the mounting mechanism (13) comprising a mounting plate (131), two groups of first sliders (137) being provided on one side of the mounting plate (131), the two groups of first sliders (137) being respectively slidably connected to the two groups of slide grooves, the two groups of first sliders (137) being fixedly connected to the mounting plate (131), a mounting block (138) being provided at a middle position of the two groups of first sliders (137), the mounting block (138) being fixedly connected to the mounting plate (131), and the mounting block (138) being connected to an output end of the first cylinder (11).

3. The air tightness detection device for ultrafiltration membrane elements according to claim 2, characterized in that: A receiving plate (136) is provided at the bottom of the mounting plate (131), and the receiving plate (136) is fixedly connected to the mounting plate (131). Two groups of second cylinders (132) are provided on a side of the mounting plate (131) away from the mounting block (138), and the output ends of the two groups of second cylinders (132) are respectively connected to a group of first connecting blocks (133), and one side of the two groups of first connecting blocks (133) is respectively provided with a group of second sliding blocks (139), and a group of connecting plates (135) are respectively provided at the bottom of the two groups of second sliding blocks (139), and the two groups of connecting plates (135) are connected to the two groups of second sliding blocks (139), and the two groups of second sliding blocks (139) are respectively slidably connected to a group of first sliding rails (134).

4. The air tightness detection device for ultrafiltration membrane elements according to claim 1, characterized in that: The winding mechanism (146) comprises a shell (1461), a material tray (1462) is arranged inside the shell (1461), a winding motor (1463) is arranged on one side of the shell (1461), an output end of the winding motor (1463) is connected to the material tray (1462), an outer side wall of the shell (1461) is provided with a pipe outlet (1464), and an inner side wall of the pipe outlet (1464) is provided with a rounded corner.

5. The air tightness detection device for ultrafiltration membrane elements according to claim 1, characterized in that: The detection mechanism (34) further comprises a transfer cylinder (341), the output end of the transfer cylinder (341) is connected to a sliding block (342), the sliding block (342) is slidably connected to the top of the placement seat (33), a placement plate (343) is arranged on the top of the sliding block (342), the placement plate (343) is fixedly connected to the sliding block (342), a driving motor (344) is arranged on one side of the placement plate (343), a first driving wheel (345) is arranged below the driving motor (344), a first driven wheel (346) is arranged above the first driving wheel (345), and a first belt (347) is sleeved on the outer sides of the first driven wheel (346) and the first driving wheel (345).

6. The air tightness detection device for ultrafiltration membrane elements according to claim 5, characterized in that: A second driving wheel (348) is provided on a side of the placement plate (343) away from the first driving wheel (345); the second driving wheel (348) and the first driving wheel (345) are connected through a first output shaft; a second driven wheel (349) is provided above the second driving wheel (348); the second driven wheel (349) and the first driven wheel (346) are connected through a second output shaft.

7. The air tightness detection device for ultrafiltration membrane elements according to claim 6, characterized in that: An auxiliary wheel (3404) is arranged on the same side of the second driven wheel (349) and the second driving wheel (348); a second belt (3401) is sleeved on the outer sides of the second driving wheel (348), the second driven wheel (349) and the auxiliary wheel (3404); the rotating ring (3403) is arranged on a side of the second driven wheel (349) and the second driving wheel (348) away from the auxiliary wheel (3404); a plurality of limiting wheels (3402) are arranged around the outer side of the rotating ring (3403); and a limiting member (3405) is arranged on a side of the rotating ring (3403) away from the second driven wheel (349).

8. A method for detecting air tightness of an ultrafiltration membrane element, using an air tightness detection device of an ultrafiltration membrane element as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1. First, a robot is used to place the welded housing component (2) at a middle position of the plugging component (1), and an initial position of the housing component (2) is determined; S2. After the position of the housing element (2) is determined, the housing element (2) is lifted up under the action of the blocking component (1) to be opposite to the detection component (3), and the detection component (3) is activated. The detection component (3) activates the outer side of the housing element (2) and surrounds the housing element (2); S3. Then, the inflation component (4) is started, and the inflation component (4) inflates air into the interior of the housing element (2). At this time, the detection component (3) can detect the leakage of the housing element (2) and locate the leakage point.

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