Ultrafiltration membrane element air tightness detection device and detection method thereof

Abstract

The invention is suitable for the technical field of ultrafiltration membrane element detection, and provides an ultrafiltration membrane element air tightness detection device and a detection method thereof.The ultrafiltration membrane element air tightness detection device comprises a plugging assembly, a shell element is arranged in the middle of the plugging assembly, and a detection assembly is arranged on one side of the shell element; the two sides of the plugging assembly are each provided with a set of inflation assembly, the side, away from the detection assembly, of the plugging assembly is provided with a control assembly, the plugging assembly comprises two sets of plugging mechanisms, the two sets of plugging mechanisms are arranged at the two ends of the shell element respectively, and the two sets of plugging mechanisms are connected through an ultrasonic sensor. The air leakage point of the shell element can be accurately positioned, a welding seam of the shell element is directly detected, when problems are detected, the shell element can be directly returned to a welding station for welding treatment, accurate positioning and rapid repairing can be achieved, the working efficiency is improved, the welding process can be further improved through the air leakage point, and the welding quality is improved. The welding efficiency is improved.

Description

Technical Field

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

[0002] Ultrafiltration membrane elements are polymer semipermeable membrane elements used in ultrafiltration processes. They can separate polymer colloids or suspended particles of a certain size from solutions. Ultrafiltration membrane elements are usually composed of multiple key parts, each of which has its specific function, which together ensure the efficient operation of the ultrafiltration process.

[0003] At present, the ultrafiltration membrane element includes key components such as ultrafiltration membrane, housing, seals, connecting pipes, supporting structure and 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 provide a stable operating environment for the membrane element. In actual applications, if the ultrafiltration membrane housing leaks, outside air may enter the membrane assembly, and the composition of the material in contact with the membrane surface will change, which may cause membrane oxidation, aging and other problems, shortening the service life of the membrane element. Therefore, it is necessary to perform air tightness testing on the ultrafiltration membrane housing element.

[0004] However, the air tightness test of the existing ultrafiltration membrane housing element is generally carried out after the housing is manufactured. However, if the air tightness test is carried out after the housing is manufactured, if there is a problem with the test result, it will not only increase the difficulty of repairing, but also repeat the processing at the same position will weaken the pressure-bearing capacity of this part of the shell. 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, welding, polishing, shaping, rounding, etc., among which only the main process of welding will affect its air tightness. If a problem is detected in the housing after rounding, it is necessary to weld again to repair the leak. Therefore, testing the air tightness after the housing is manufactured will not only increase the complexity of the repair work, but also make it difficult to accurately locate the leak. An ultrafiltration membrane element air tightness detection device and a detection method thereof are proposed to improve the existing problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide an ultrafiltration membrane element air tightness detection device and a detection method thereof.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ultrafiltration membrane element air tightness detection device, comprising a sealing component, a shell component is arranged in the middle position of the sealing component, a detection component is arranged on one side of the shell component, a group of inflation components are respectively arranged on both sides of the sealing component, and a control component is arranged on the side of the sealing component away from the detection component.

[0007] The blocking assembly comprises two groups of blocking mechanisms, which are respectively arranged at two ends of the shell element, and the two ends of the shell element are respectively adapted to the two groups of blocking mechanisms.

[0008] The blocking mechanism comprises a connecting piece inflation tube and a main body inflation tube arranged on one side of the connecting piece inflation tube.

[0009] The detection assembly includes a placement seat and a detection mechanism arranged on the top of the placement seat; The detection mechanism comprises a rotating ring and an ultrasonic sensor arranged on the inner wall of the rotating ring.

[0010] By adopting the above technology, the main body inflation tube is respectively connected with the inflation component, and the gas inside the inflation component can enter into the shell element through the connector inflation tube and the main body inflation tube. Because the connector inflation tube passes through the box body but not the sealing plate, the two sets of connector inflation tubes can respectively perform fixed-point inflation on both ends of the shell element. In addition, the main body inflation tube passes through the box body and the sealing plate in turn. Therefore, the main body inflation tube can inflate the main part of the shell element. By setting the connector inflation tube and the main body inflation tube, the demand for fixed-point inflation can be met.

[0011] The present invention is further configured as follows: the sealing assembly also includes a first cylinder, a support frame is provided at the bottom of the first cylinder, a group of slide grooves are respectively opened on both sides of the support frame, a mounting mechanism is provided on one side of the support frame, the mounting mechanism includes a mounting plate, two groups of first sliders are provided on one side of the mounting plate, the two groups of first sliders are respectively slidably connected to the two groups of slide grooves, the two groups of first sliders are fixedly connected to the mounting plate, a mounting block is provided in the middle position of the two groups of first sliders, the mounting block is fixedly connected to the mounting plate, and the mounting block is connected to the output end of the first cylinder.

[0012] The present invention is further configured as follows: a receiving plate is provided at the bottom of the mounting plate, the receiving plate is fixedly connected to the mounting plate, two groups of second cylinders are provided on the side of the mounting plate away from the mounting block, the output ends of the two groups of second cylinders are respectively connected to a group of first connecting blocks, one side of the two groups of first connecting blocks is respectively provided with a group of second sliding blocks, a group of connecting plates are respectively provided at the bottom of the two groups of second sliding blocks, the two groups of connecting plates are connected to the two groups of second sliding blocks, and the two groups of second sliding blocks are respectively slidably connected to a group of first sliding rails.

[0013] The present invention is further configured as follows: the sealing mechanism also includes a box body, a plurality of third cylinders are arranged on one side of the box body, the output ends of the plurality of third cylinders are connected to a sealing plate, the connecting piece inflation pipe passes through the box body, the main body inflation pipe passes through the box body and the connecting piece inflation pipe in turn, a winding mechanism is arranged inside the box body, and the winding mechanism is used to wind up the main body inflation pipe.

[0014] The present invention is further configured as follows: the winding mechanism includes a shell, a material tray is arranged inside the shell, a winding motor is arranged on one side of the shell, the output end of the winding motor is connected to the material tray, an outer wall of the shell is provided with an outlet, and an inner wall of the outlet is provided with a rounded corner.

[0015] By adopting the above technology, the shell element can be blocked by setting a blocking mechanism, and the shell element can be inflated in blocks to achieve the purpose of fixed-point detection of the shell element.

[0016] The present invention is further configured as follows: the detection component comprises a first electric slide rail, a second electric slide rail is arranged on the top of the first electric slide rail, and the placement seat is arranged on the top of the second electric slide rail.

[0017] By adopting the above technology, the left and right position of the detection mechanism can be adjusted by setting the first electric slide rail, and the front and rear position of the detection mechanism can be adjusted by the second electric slide rail. The detection mechanism can perform all-round detection of the housing components to meet the detection needs, and the placement seat provides stable support for the detection mechanism during the movement of the detection mechanism.

[0018] The present invention is further configured as follows: the detection mechanism also includes a transfer cylinder, the 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 provided on the top of the sliding block, the placement plate is fixedly connected to the sliding block, a driving motor is provided on one side of the placement plate, a first driving wheel is provided below the driving motor, a first driven wheel is provided above the first driving wheel, and a first belt is provided on the outer sides of the first driven wheel and the first driving wheel.

[0019] The present invention is further configured as follows: a second driving wheel is arranged on the 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 arranged above the second driving wheel, and the second driven wheel and the first driven wheel are connected through a second output shaft.

[0020] The present invention is further configured as follows: an auxiliary wheel is arranged on the same side of the second driven wheel and the second driving wheel, a second belt is sleeved on the outer sides of the second driving wheel, the second driven wheel and the auxiliary wheel, the rotating ring is arranged on the side of the second driven wheel and the second driving wheel away from the auxiliary wheel, a plurality of limiting wheels are arranged around the outer side of the rotating ring, and a limiting member is arranged on the side of the rotating ring away from the second driven wheel.

[0021] 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.

[0022] 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: 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.

[0023] 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.

[0024] 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.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: (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.

[0026] (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.

[0027] (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.

[0028] (4) The inflation range can be adjusted by setting a third cylinder. The position of the blocking plate can be adjusted under the action of the third cylinder. The inflation range can be determined by two sets of blocking plates, and then the detection range can be determined. This not only increases the detection accuracy, but also shortens the detection time. In addition, in order to meet the adjustment of the blocking plate position, it is necessary to set the retraction and extension of the main inflation tube so that the length of the main inflation tube can be adjusted at any time to meet the purpose of block detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an ultrafiltration membrane element air tightness detection device and a detection method thereof in the present invention.

[0030] Figure 2 For the present invention Figure 1 Isometric view of.

[0031] Figure 3 It is a schematic diagram of the structure of the blocking component in the present invention.

[0032] Figure 4 For the present invention Figure 3 Isometric view of.

[0033] Figure 5 For the present invention Figure 2 Schematic diagram of the enlarged structure of area D in the middle.

[0034] Figure 6 It is a structural schematic diagram of the blocking mechanism in the present invention.

[0035] Figure 7 For the present invention Figure 6 Front view of .

[0036] Figure 8 It is a schematic diagram of the partial structure of the blocking mechanism in the present invention.

[0037] Fig. 9 It is a schematic diagram of the local structure of the winding mechanism in the present invention.

[0038] Fig.10 It is a structural schematic diagram of the detection mechanism in the present invention.

[0039] Fig.11 For the present invention Fig.10 Isometric view of.

[0040] Fig.12 It is a schematic diagram of the structure of the housing element in the present invention.

[0041] Fig.13 It is a schematic diagram of the working method flow of the detection device in the present invention.

[0042] Description of the accompanying drawings: 1. blocking 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. receiving plate; 137. first slider; 138. mounting block; 139. second slider; 14. blocking mechanism; 141. box; 142. connecting piece air-filling pipe; 143. main body air-filling pipe; 144. third cylinder; 145. blocking plate; 146. winding mechanism; 1461. housing; 1462. tray; 1463. winding motor; 1464. outlet; 2. Shell components; 3. Detection assembly; 31. First electric slide rail; 32. Second electric slide rail; 33. Placement seat; 34. Detection mechanism; 341. Transfer cylinder; 342. Slide block; 343. Placement 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; 4. Inflatable components; 5. Control components. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of 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 accompanying drawings and in combination with the embodiments.

[0044] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0045] See also Figure 1-13 , the present invention provides the following technical solutions: Embodiment 1, an ultrafiltration membrane element air tightness detection device, comprises a plugging component 1, a shell component 2 is arranged in the middle position of the plugging component 1, a detection component 3 is arranged on one side of the shell component 2, a group of inflation components 4 are respectively arranged on both sides of the plugging component 1, and a control component 5 is arranged on the side of the plugging component 1 away from the detection component 3.

[0046] Among them, the sealing component 1 is used to assist the normal progress of the detection work, the shell 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, and the control component 5 is used to control the progress of the detection work.

[0047] The control component 5 includes a control panel and a control system, wherein the control panel is provided with various control buttons, and the control system mainly performs corresponding processing according to the received information.

[0048] The inflation component 4 includes a pressure controller, which can set the pressure value inside the housing element 2. By controlling the pressurizing device, the inside of the housing element 2 reaches and maintains the set pressure, so as to perform airtightness detection under stable pressure conditions.

[0049] In practical applications, the main function of the shell element 2 is to protect the membrane element, prevent external physical damage and chemical erosion, and provide a stable operating environment for the membrane element. Therefore, it is necessary to perform an airtightness test on the shell element 2. Good airtightness can reduce the impact of external air on the internal membrane element. The leakage points of the airtightness of the shell element 2 itself mainly appear at the weld. Therefore, the airtightness test of the shell element 2 can be converted into the airtightness test of the weld of the shell element 2.

[0050] By directly inspecting the weld of the shell element 2, when a problem is detected, the welding process can be directly returned to the welding station for welding processing, which can not only accurately locate but also quickly repair, thereby improving work efficiency. In addition, the welding process can be further improved through the leakage point to improve welding efficiency.

[0051] See also Fig.12 Considering the function of the shell element 2 itself and the connection relationship, the shell element 2 is provided with multiple welds. Specifically, a space for placing the membrane element is provided inside the shell element 2. The placement space is the main part of the shell element 2. The main part of the shell element 2 is formed by rolling. At the same time, both ends of the shell element 2 also need to provide installation space for various seals. The installation space of the seals is provided by the connecting pieces at both ends. The connecting pieces at both ends are divided into a first connecting piece and a second connecting piece.

[0052] See also Fig.12 Therefore, the surface of the shell element 2 mainly involves three welds, which are: a first weld A, a first weld B, and a first weld C. Among them, the first weld A is a weld formed when the main part of the shell element 2 is welded to the first connecting piece, and the first weld A is set to a circular ring shape. The second weld B is a weld formed by welding the main part after rolling it, and the second weld B is set to a strip shape. The third weld C is a weld formed when the main part is welded to the second connecting piece, and the third weld C is set to a circular ring shape.

[0053] In order to realize the airtightness detection of the housing element 2, it is necessary to set the details of the plugging component 1. The specific structure of the plugging component 1 is as follows: See also Figure 1-Figure 5The blocking assembly 1 includes two sets of blocking mechanisms 14 , which are 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 sets of blocking mechanisms 14 .

[0054] See also Figure 1-Figure 5 The blocking assembly 1 further includes a first cylinder 11 , a support frame 12 is disposed at the bottom of the first cylinder 11 , and a mounting mechanism 13 is disposed on one side of the support frame 12 .

[0055] In actual detection work, the housing element 2 needs to be adjusted so that the position of the housing element 2 is opposite to the detection component 3. In order to adjust the position of the housing element 2, the installation mechanism 13 is specifically and detailedly set.

[0056] The specific structure of the mounting mechanism 13 is as follows: See also Figure 1-Figure 5 The mounting mechanism 13 includes a mounting plate 131, two groups of first sliders 137 are arranged on one side of the mounting plate 131, a group of slide grooves are 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 slide grooves, the two groups of first sliders 137 are fixedly connected to the mounting plate 131, and a mounting block 138 is arranged in the middle position of the two groups of first sliders 137, the mounting block 138 is fixedly connected to the mounting plate 131, and the mounting block 138 is connected to the output end of the first cylinder 11.

[0057] See also Figure 1-Figure 5 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 the side of the mounting plate 131 away from the mounting block 138. The output ends of the two groups of second cylinders 132 are respectively connected to a group of first connecting blocks 133. One side of the two groups of first connecting blocks 133 is respectively provided with a group of second sliding blocks 139. A group of connecting plates 135 are respectively provided at the bottom of the two groups of second sliding blocks 139. 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 with a group of first slide rails 134.

[0058] See also Figure 1-Figure 5 Two sets of limit seats are arranged on the top of the receiving plate 136 , the two sets of limit seats are matched with the two ends of the shell element 2 , and the limit seats can set the shell element 2 to limit the position.

[0059] The two groups of blocking mechanisms 14 are fixedly connected to the two groups of connecting plates 135 respectively, and the two groups of blocking mechanisms 14 are arranged opposite to each other.

[0060] The specific operation process of the plugging component 1 is as follows: Firstly, the welded shell component 2 can be placed at the positions of two sets of limit seats by a robot, and the limit seats perform preliminary positioning on the shell component 2 .

[0061] Then start the two groups of second cylinders 132, and the two groups of second cylinders 132 drive their corresponding first connecting blocks 133 respectively. Driven by the two groups of first connecting blocks 133, the two groups of second sliders 139 move along the two groups of first slide rails 134 respectively, and the two groups of connecting plates 135 fixedly connected to the two groups of second sliders 139 move with the two groups of second sliders 139. At the same time, the two groups of blocking mechanisms 14 move with the two groups of connecting plates 135 until the two groups of blocking mechanisms 14 block the two ends of the shell element 2. At this time, in addition to the blocking effect on the shell element 2, the two groups of blocking mechanisms 14 also stably clamp the shell element 2, thereby reducing the shaking of the shell element 2 during detection, thereby reducing the impact on the detection result.

[0062] Furthermore, after the placement position of the shell element 2 is determined, the first cylinder 11 is started. Driven by the first cylinder 11, the two groups of first sliders 137 move along the two groups of slide grooves respectively. At this time, the mounting plate 131 fixedly connected to the two groups of first sliders 137 moves following the first slider 137. At the same time, because the mounting plate 131 is fixedly connected to the receiving plate 136, the receiving plate 136 moves following the mounting plate 131. That is, the receiving plate 136 can be lifted by starting the first cylinder 11. Because the shell element 2 is placed above the receiving plate 136, the shell element 2 is blocked by the two groups of blocking mechanisms 14, and the two groups of blocking mechanisms 14 are respectively connected to the two groups of connecting plates 135. Then, driven by the first cylinder 11, the mounting mechanism 13 can be lifted as a whole, and the position of the shell element 2 can be adjusted.

[0063] By arranging the first cylinder 11, the mounting mechanism 13, and the blocking mechanism 14 to work in coordination, the position of the housing element 2 can be adjusted so that the housing element 2 is matched with the detection component 3 to meet the detection requirements.

[0064] The housing element 2 can be adjusted in position under the drive of the blocking component 1. After the position is adjusted, a detection component 3 needs to be set to detect the housing element 2. The specific structure of the detection component 3 is as follows: See also 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.

[0065] See also Figure 1 and Figure 2 The detection assembly 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 .

[0066] By setting the first electric slide rail 31, the left and right position of the detection mechanism 34 can be adjusted, and the second electric slide rail 32 can adjust the front and rear position of the detection mechanism 34. The detection mechanism 34 can perform all-round detection of the housing element 2 to meet the detection requirements. During the movement of the detection mechanism 34, the placement seat 33 provides stable support for the detection mechanism 34.

[0067] The basic detection device of the detection assembly 3 can be designed through the above structure, but the placement position of the sensor and the details of the specific detection structure need further settings. Therefore, the installation mechanism 13 needs to be designed in detail. The specific structure of the installation mechanism 13 is as follows: See also Fig.10 and Fig.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.

[0068] By setting up an ultrasonic sensor 35, the leakage point can be detected. When gas leaks from the leakage point of the shell element 2, a high-speed jet of air will be formed. This airflow will produce turbulence and vibration at the leakage port, thereby exciting an ultrasonic signal, which is then received and processed by the ultrasonic sensor 35 to detect the leakage point.

[0069] See also Fig.10 and Fig.11 The detection mechanism 34 also includes 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 provided 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 provided on one side of the placement plate 343, a first driving wheel 345 is provided below the driving motor 344, a first driven wheel 346 is provided above the first driving wheel 345, and a first belt 347 is provided on the outer side of the first driven wheel 346 and the first driving wheel 345.

[0070] See also Fig.10 and Fig.11 The output end of the driving motor 344 is connected to a reducer, and the output end of the reducer is connected to 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.

[0071] See also Fig.10 and Fig.11A second driving wheel 348 is provided on the side of the placement plate 343 away from the first driving wheel 345, and the second driving wheel 348 and the first driving wheel 345 are connected through the first output shaft. A second driven wheel 349 is provided above the second driving wheel 348, and the second driven wheel 349 and the first driven wheel 346 are connected through the second output shaft.

[0072] See also Fig.10 and Fig.11 An auxiliary wheel 3404 is arranged on the same side of the second driven wheel 349 and the second driving wheel 348, and 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. 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, and a plurality of limiting wheels 3402 are arranged around the outer side 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.

[0073] The limit member 3405 is fixedly connected to the placement plate 343, and a visual detection sensor is provided on one side of the limit member 3405. The visual detection sensor can determine the position of the shell element 2 and transmit the position information of the shell element 2 to the control system. The control system then controls the first cylinder 11, and the first cylinder 11 drives the shell element 2 to be lifted to a position relative to the detection component 3.

[0074] By providing the limiting wheels 3402 and the limiting members 3405 , the rotating ring 3403 can be made to run in a track formed by a plurality of limiting wheels 3402 , thereby preventing the rotating ring 3403 from deviating from the track during the rotation process.

[0075] The operation process of detection component 3 is as follows: The first electric slide rail 31 is started, and the detection mechanism 34 is driven by the first electric slide rail 31 to gradually move into the detection range of the second weld B. At the same time, when the shell element 2 is placed inside the two sets of limit seats by the robot and is clamped stably by the blocking mechanism 14, and then the first cylinder 11 is started, the first cylinder 11 gradually lifts the shell element 2. Under the action of the visual detection sensor, when the shell element 2 is opposite to the detection component 3, the first cylinder 11 stops working and the position of the shell element 2 is determined.

[0076] After the position of the shell element 2 is determined, the second electric slide rail 32 is started, and 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 again, and the placement plate 343 is driven to move by the transfer cylinder 341, and the position of the rotating ring 3403 is fine-tuned until the rotating ring 3403 surrounds the shell element 2. At this point, the position of the detection component 3 is determined.

[0077] After the positions of the shell element 2 and the detection component 3 are determined, two groups of inflation components 4 are required to inflate the interior of the shell element 2. Since the shell element 2 is blocked by two groups of sealing mechanisms 14, the two groups of sealing mechanisms 14 are respectively connected to the two groups of inflation components 4. When the inflation component 4 inflates the shell element 2, the gas can enter the interior of the shell element 2 through the sealing mechanism 14. After the inflation is completed, it is detected by the ultrasonic sensor 35. Since the three welds have different shapes, it is necessary to perform airtightness detection on the welds according to different situations. Among them, the first weld A and the third weld C are both arc-shaped, and the annular detection method is adopted. The second weld B is strip-shaped, and the translation detection method is adopted.

[0078] The process of the ring detection method is as follows: The driving motor 344 is started, and the driving motor 344 drives the first driving wheel 345 to rotate. Driven by the first belt 347, the first driven wheel 346 rotates following the first driving wheel 345. The first driving wheel 345 and the first driven wheel 346 respectively drive the second driving wheel 348 and the second driven wheel 349 to rotate. Because the auxiliary wheel 3404 rotates following the second driving wheel 348 and the second driven wheel 349 driven by the second belt 3401, the rotating ring 3403 can be driven to rotate within the range surrounded by the plurality of limiting wheels 3402 under the action of the second driving wheel 348, the second driven wheel 349, the auxiliary wheel 3404 and the second belt 3401. 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.

[0079] The process of translation detection method is as follows: Start the second electric slide rail 32, and the second electric slide rail 32 can drive the detection mechanism 34 to achieve left and 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 translation detection of the strip weld. At the same time, on the basis of translation detection, when detecting 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.

[0080] By setting up an ultrasonic sensor 35 in coordination with the detection mechanism 34, the leakage point of the housing element 2 can be accurately located. After the leakage point is detected, it can be directly returned to the welding station for welding processing, which can not only accurately locate, but also quickly repair, thereby improving work efficiency. In addition, the welding process can be further improved through the leakage point to improve welding efficiency.

[0081] In the second embodiment, the first weld A, the second weld B and the third weld C can be detected separately by the ultrasonic sensor 35. However, since the gas is not separated inside the shell element 2, if the shell element 2 has multiple leakage points and the leakage points are far apart, the gas inside the shell element 2 will leak, and the air pressure inside the shell element 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 and the detection efficiency is reduced.

[0082] See also Figure 1 Therefore, the blocking mechanism 14 is designed in detail for the inflation problem inside the shell element 2. The blocking mechanism 14 is used to achieve fixed-point inflation inside the shell element 2. The specific structure of the blocking mechanism 14 is as follows: See also Figure 6-Figure 9 The blocking mechanism 14 includes a connecting piece inflation tube 142 and a main body inflation tube 143 arranged on one side of the connecting piece inflation tube 142 .

[0083] See also Figure 6-Figure 9 The blocking mechanism 14 also includes a box body 141, a plurality of third cylinders 144 are arranged on one side of the box body 141, the output ends of the plurality of third cylinders 144 are connected to a blocking plate 145, a connecting piece inflation pipe 142 is arranged through the box body 141, and a main body inflation pipe 143 is arranged through the box body 141 and the connecting piece inflation pipe 142 in sequence.

[0084] See also Figure 6-Figure 9 The main body inflation tube 143 is respectively connected to the inflation component 4, and the gas inside the inflation component 4 can enter the interior of the outer shell element 2 through the connector inflation tube 142 and the main body inflation tube 143. Because the connector inflation tube 142 penetrates the box body 141 but does not penetrate the sealing plate 145, that is, the two groups of connector inflation tubes 142 can respectively perform fixed-point inflation on both ends of the outer shell element 2. In addition, the main body inflation tube 143 penetrates the box body 141 and the sealing plate 145 in turn. Therefore, the main body inflation tube 143 can inflate the main part of the outer shell element 2. By setting the connector inflation tube 142 and the main body inflation tube 143, the demand for fixed-point inflation can be met.

[0085] The main part of the shell element 2 is relatively long. If the main part is only inflated once, the detection time of the ultrasonic sensor 35 will still be increased. 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. The inflation range can be determined by two groups of sealing plates 145, and then the detection range can be determined, which not only increases the detection accuracy, but also shortens the detection time.

[0086] In order to adjust the position of the blocking plate 145, it is necessary to set the retraction and extension of the main body inflation tube 143 so that the length of the main body inflation tube 143 can be adjusted at any time to meet the purpose of block detection.

[0087] To this end, a winding mechanism 146 is provided inside the box body 141 , and the winding mechanism 146 is used to roll up the main inflation tube 143 .

[0088] The specific structure of the winding mechanism 146 is as follows: See also Figure 6-Figure 9 The winding mechanism 146 includes 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, the output end of the winding motor 1463 is connected to the material tray 1462, an outer wall of the shell 1461 is provided with an outlet 1464, and the inner wall of the outlet 1464 is provided with a rounded corner.

[0089] The testing process is as follows: After the positions of the shell element 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, air is inflated into the interior of the first connecting piece through the connecting piece inflation tube 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.

[0090] After the inspection of the first weld A is completed, the third cylinder 144 is started, and 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 constitute a group of inflation space, and then the space is inflated through the main inflation pipe 143. The ultrasonic sensor 35 cooperates with the detection mechanism 34 to start the air tightness detection of the inflation space of the second weld B. Subsequently, the two groups of sealing plates 145 are driven by their respective third cylinders 144 to gradually move toward the position of the second connecting piece. 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 the entire inspection of the second weld B, so as to achieve the purpose of comprehensive inspection of the second weld B.

[0091] After the inspection of the second weld B is completed, the air tightness test is performed on the third weld C at the second connecting piece. At this time, the sealing plate 145 at the second connecting piece and the box body 141 block the second connecting piece to form an inflation space for air tightness test, and then the second connecting piece is inflated into the interior of the second connecting piece through the connecting piece inflation tube 142 at the second connecting piece. At this time, the ultrasonic sensor 35 cooperates with the detection mechanism 34 to perform air tightness test on the third weld C.

[0092] Example 3, see Fig.13 A method for detecting air tightness of an ultrafiltration membrane element using an ultrafiltration membrane element air tightness detection device comprises the following steps: S1. First, the welded shell component 2 is placed in the middle position of the plugging component 1 by a robot, and the initial position of the shell component 2 is determined.

[0093] S11. First, the welded housing component 2 can be placed at the positions of two sets of limit seats by a robot, and the limit seats perform preliminary positioning on the housing component 2.

[0094] S12. Start the two groups of second cylinders 132 again. The two groups of second cylinders 132 drive their corresponding first connecting blocks 133 respectively. Driven by the two groups of first connecting blocks 133, the two groups of second sliders 139 move along the two groups of first slide rails 134 respectively. The two groups of connecting plates 135 fixedly connected to the two groups of second sliders 139 move with the two groups of second sliders 139. At the same time, the two groups of blocking mechanisms 14 move with the two groups of connecting plates 135 until the two groups of blocking mechanisms 14 block the two ends of the housing element 2.

[0095] S13. Further, after the placement position of the shell element 2 is determined, the first cylinder 11 is started. Driven by the first cylinder 11, the two groups of first sliders 137 move along the two groups of slide grooves respectively. At this time, the mounting plate 131 fixedly connected to the two groups of first sliders 137 moves following the first slider 137. At the same time, because the mounting plate 131 is fixedly connected to the receiving plate 136, the receiving plate 136 moves following the mounting plate 131, that is, the receiving plate 136 can be lifted by starting the first cylinder 11. Because the shell element 2 is placed above the receiving plate 136, the shell element 2 is blocked by the two groups of blocking mechanisms 14, and the two groups of blocking mechanisms 14 are respectively connected to the two groups of connecting plates 135, the mounting mechanism 13 can be lifted as a whole under the drive of the first cylinder 11, that is, the position of the shell element 2 can be adjusted.

[0096] S2. Secondly, after the position of the shell element 2 is determined, the shell 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 started. The detection component 3 starts the outer side of the shell element 2 and surrounds the shell element 2.

[0097] S21. Next, after the position of the housing element 2 is determined, the first electric slide rail 31 is started, and the detection mechanism 34 is gradually moved into the detection range of the second weld B driven by the first electric slide rail 31.

[0098] S22, and then start the first cylinder 11, which gradually lifts the housing element 2. Under the action of the visual detection sensor, when the housing element 2 is opposite to the detection component 3, the first cylinder 11 stops working and the position of the housing element 2 is determined.

[0099] S23. After the position of the shell element 2 is determined, start the second electric slide rail 32, which drives the detection mechanism 34 to gradually move forward. After the approximate position is determined, start the transfer cylinder 341, which drives the placement plate 343 to move, and fine-tune the position of the rotating ring 3403 until the rotating ring 3403 surrounds the shell element 2.

[0100] 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.

[0101] S31. Then, when the positions of the shell element 2 and the detection component 3 are determined, air is first inflated at one end of the shell element 2. More specifically, air is inflated inside the first connecting part through the connecting part inflation tube 142. At this time, the ultrasonic sensor 35 cooperates to perform air tightness detection on the first weld A.

[0102] S32. After the inspection 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 constitute a group of inflatable spaces, and then the space is inflated through the main body inflation tube 143. The ultrasonic sensor 35 cooperates to start the air tightness inspection of the first inspection range of the second weld B. Subsequently, the two groups of sealing plates 145 gradually move under the drive of their respective third cylinders 144, and the ultrasonic sensor 35 cooperates with them to gradually complete the entire inspection of the second weld B.

[0103] S33, after the second weld B is inspected, the air tightness inspection of the third weld C at the second connecting piece is performed. The air tightness inspection steps for the third weld C are the same as S31.

[0104] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection 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 detection assembly (3) comprises a placement seat (33) and a detection mechanism (34) arranged on the top of the placement seat (33); 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 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), the 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 connecting piece air-inflating tube (142) 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).

5. The air tightness detection device for ultrafiltration membrane elements according to claim 4, 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.

6. The air tightness detection device for ultrafiltration membrane elements according to claim 1, characterized in that: 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).

7. 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).

8. The air tightness detection device for ultrafiltration membrane elements according to claim 7, 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.

9. The air tightness detection device for ultrafiltration membrane elements according to claim 8, 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).

10. 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 9, 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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