Positioning tool for assembling ultrafiltration membrane tube

Abstract

This utility model discloses a positioning fixture for assembling ultrafiltration membrane tubes, including a worktable, a fixed plate at one end of the worktable, and a positioning rod penetrating the fixed plate; the fixed plate has a first through hole for the positioning rod to pass through, and the positioning rod has external threads on its outer side and is fixed to the fixed plate by a locking nut; the other end of the worktable has a movable plate and a driving mechanism for moving the movable plate toward the fixed plate; the side of the positioning rod has at least one row of support seats for supporting the membrane tube, and membrane heads are bonded to both sides of the membrane tube; the movable plate moves to abut against the positioning rod, and the distance between the movable plate and the fixed plate is the set total length of the membrane tube and the membrane heads at both ends. This utility model utilizes a positioning rod with external threads and a locking nut for cooperation, and the positioning rod has a scale value, which can accurately adjust the length of the positioning rod extending out of the fixed plate, greatly improving the accuracy of membrane head assembly and positioning, and ensuring stable product quality.

Description

Technical Field

[0001] This utility model relates to the field of filter membrane tube processing technology, and in particular to a positioning tool for assembling ultrafiltration membrane tubes. Background Technology

[0002] In the field of ultrafiltration membrane manufacturing, the assembly quality of ultrafiltration membrane modules is crucial to product performance and reliability, with the bonding and assembly of the membrane tube and membrane head being a key process. Currently, in the production of ultrafiltration membranes, manual measurement and visual inspection are commonly used to position the membrane head during assembly. This method suffers from insufficient precision in bonding and assembly, and manual measurement is prone to errors, making it difficult to guarantee consistent accuracy across different measurements. Meanwhile, visual inspection is limited by the human eye's resolution and is susceptible to eye fatigue, making it difficult to achieve highly precise positioning of the membrane head. Consequently, the bonding depth of the membrane head varies between batches, severely impacting the consistency between ultrafiltration membrane production batches and leading to unstable product quality.

[0003] In the prior art, CN219050920U discloses an integrated opening and bonding device for a membrane filter, including a support platform and a bonding device mounted on the support platform; the membrane filter has a membrane shell, which includes a membrane tube and two membrane heads bonded to both ends of the membrane tube; the bonding device is used to bond the two membrane heads to both ends of the membrane tube of the membrane filter respectively; the bonding device includes a positioning tube, a fixing plate, a pushing plate, and a driving device; the positioning tube is disposed in the membrane tube; the length of the positioning tube is equal to the length of the membrane shell; the fixing plate is fixed to one end of the support platform, and the driving device is mounted on the other end of the support platform; the driving device is connected to the pushing plate; the driving device can drive the pushing plate to move; the membrane tube of the membrane filter is supported on the support platform and located between the fixing plate and the pushing plate. This device can use the length of the positioning tube to limit the length of the membrane shell, so that the length of the membrane shell remains consistent. However, each size of membrane housing requires a different positioning tube, increasing assembly costs. Furthermore, both the membrane housing and the positioning tube are long and thin, making the operation extremely complex, whether inserting the positioning tube into the membrane housing or removing the membrane housing from the positioning tube. Moreover, this device can only assemble and position one membrane tube at a time, resulting in low work efficiency. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a positioning fixture for assembling ultrafiltration membrane tubes. The fixture allows for precise adjustment of the positioning rod length, is suitable for various specifications of ultrafiltration membrane tubes, and can simultaneously assemble and position multiple ultrafiltration membrane tubes.

[0005] Therefore, the technical solution of this utility model is: a positioning fixture for assembling ultrafiltration membrane tubes, including a worktable, a fixed plate and a positioning rod penetrating the fixed plate at one end of the worktable; the fixed plate has a first through hole for the positioning rod to pass through, and the positioning rod has an external thread on its outer side and is fixed to the fixed plate by a locking nut; the other end of the worktable has a movable plate and a driving mechanism for driving the movable plate to move toward the fixed plate; the side of the positioning rod has at least one row of support seats for supporting the membrane tube, and membrane heads are bonded to both sides of the membrane tube; the movable plate moves to abut against the positioning rod, the distance between the movable plate and the fixed plate is the set total length of the membrane tube and the membrane heads at both ends, and abuts against the membrane heads at both ends respectively.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the positioning rod is provided with a scale bar that runs through the entire positioning rod in the axial direction, and the 0 point of the scale bar is located at the end facing the movable plate.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the workbench is provided with a positioning rod support seat, and the positioning rod support seat is provided with a second through hole for the positioning rod to pass through; the positioning rod is in a horizontal state, and its two ends are perpendicular to the movable plate and the fixed plate respectively.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the driving mechanism includes a driving mounting base, a driving cylinder and a moving platform. The driving cylinder is mounted on the driving mounting base, the cylinder rod of the driving cylinder is connected to the moving platform, and the movable plate is fixed on the moving platform.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the drive mounting base is provided with a guide rail, and the moving platform is provided with rollers that move along the guide rail below; the moving platform is provided with guide rods on both sides, and the drive cylinder is provided with guide sleeves on both sides, and the two work together.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: a pressure sensor is provided on the movable plate, and the pressure sensor is positioned opposite to the end of the positioning rod.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: the support base includes a base, a connecting rod and an arc-shaped support block. The base is provided with a third through hole for the connecting rod to pass through. The connecting rod is provided with external threads and is fixed to the base by a nut. The bottom of the arc-shaped support block is fixed to the connecting rod, and the top is provided with an arc-shaped support groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The positioning rod, with its external thread and locking nut, allows for adjustment of its extension length, making it suitable for various specifications of ultrafiltration membrane tubes. The positioning rod also features a scale, enabling precise adjustment of its extension length from the fixing plate. This determines the total length of the membrane tube and its two ends, significantly improving the accuracy of membrane head assembly and positioning, effectively avoiding manual measurement errors, ensuring consistent membrane head bonding depth in each batch, and thus guaranteeing stable product quality.

[0014] Multiple rows of support seats can be set on the workbench, and multiple ultrafiltration membrane tubes can be assembled and positioned simultaneously using large fixed plates and movable plates, which greatly improves work efficiency and accelerates the production process of ultrafiltration membranes.

[0015] The use of guide rails and rollers makes the movement of the movable plate more stable. The guide rods on both sides of the moving platform work in conjunction with the guide sleeves on both sides of the drive cylinder, so the movable plate will not tilt during the movement, ensuring that the total length of the ultrafiltration membrane tube and membrane head is consistent after assembly.

[0016] A pressure sensor is installed on the movable plate, which is positioned opposite to the end of the positioning rod. This allows for real-time monitoring of the pressure when the movable plate and the positioning rod come into contact, preventing excessive or insufficient pressure from affecting the membrane head assembly quality and further optimizing the operation process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Example 1;

[0018] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0019] Figure 3 This is a top view of the structure of Example 1;

[0020] Figure 4 This is a schematic diagram of the drive mechanism in Example 1;

[0021] Figure 5 This is a schematic diagram illustrating the use of Example 1;

[0022] Figure 6 This is a partial structural diagram of Example 2.

[0023] The components in the diagram are labeled as follows: workbench 1, fixed plate 2, positioning rod 3, external thread 31, scale bar 32, first locking nut 33, second locking nut 34, positioning rod support 4, upper limit block 41, lower limit block 42, movable plate 5, drive mounting base 51, drive cylinder 52, moving table 53, guide rail 54, roller 55, guide rod 56, guide sleeve 57, cylinder rod 58, support seat 6, base 61, connecting rod 62, arc-shaped support block 63, arc-shaped support groove 64, membrane tube 7, membrane head 71, and pressure sensor 8. Detailed Implementation

[0024] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0026] Example 1

[0027] The positioning fixture for assembling the ultrafiltration membrane tube described in this embodiment includes a worktable 1, a fixed plate 2 at one end of the worktable 1, and a positioning rod 3 penetrating the fixed plate 2. The fixed plate 2 has a first through hole for the positioning rod 3 to pass through. The positioning rod 3 has an external thread 31 on its outer side and is fixed to the fixed plate 2 by a locking nut. Two locking nuts are screwed onto the positioning rod 3, located on both sides of the fixed plate 2, so that the extended length of the positioning rod 3 is fixed. At the same time, the positioning rod 3 has a scale bar 32 that penetrates the entire positioning rod axially, and the 0 point of the scale bar is located at the end facing the movable plate 5. When installing the positioning rod 3, first screw the first locking nut 33 onto the positioning rod 3, and the first locking nut 33 can be aligned with a suitable scale value. This scale value is the set total length H of the membrane tube 7 and the membrane heads 71 ​​at both ends. After fixing, the remaining part of the positioning rod 3 passes through the first through hole of the fixed plate 2, and then the positioning rod 3 is firmly fixed to the fixed plate 2 with a second locking nut 34.

[0028] Meanwhile, to prevent the positioning rod 3 from being too long and unstable at the other end, a positioning rod support 4 can be provided on the worktable 1. The positioning rod support 4 has a second through hole for the positioning rod 3 to pass through. The positioning rod 3 is in a horizontal state, and the other end passes through the second through hole. The number and spacing of the positioning rod support 4 are determined according to the actual situation, as long as the positioning rod 3 can be kept in a horizontal state. In addition, for easier placement of the positioning rod 3, the positioning rod support 4 can be divided into an upper limit block 41 and a lower limit block 42. Each of the two limit blocks has a semi-circular groove, which is assembled to form the second through hole. The upper limit block 41 and the lower limit block 42 can be fixed together by magnetic attraction, pins, or other means.

[0029] The other end of the workbench 1 is provided with a movable plate 5 and a drive mechanism that drives the movable plate 5 to move toward the fixed plate 2; the movable plate 5 and the fixed plate 2 are parallel to each other and both are perpendicular to the positioning rod 3; when the movable plate 5 moves to abut against the positioning rod 3, the distance between the movable plate 5 and the fixed plate 2 is the set total length H of the membrane tube 7 and the membrane heads 71 ​​at both ends. Therefore, when the movable plate 5 and the fixed plate 2 abut against the membrane heads 71 ​​at both ends respectively, it can be said that the actual total length of the membrane tube 7 and the membrane heads 71 ​​at both ends meets the standard.

[0030] The driving mechanism includes a driving mounting base 51, a driving cylinder 52, and a moving platform 53. The driving cylinder 52 is mounted on the driving mounting base 51, and its cylinder rod 58 is connected to the moving platform 53. The movable plate 5 is fixed on the moving platform 53. The driving mounting base 51 is provided with a guide rail 54, and the moving platform 53 is provided with rollers 55 that move along the guide rail 54. The cooperation between the guide rail 54 and the rollers 55 makes the movement of the movable plate 5 more stable. The moving platform 53 is provided with guide rods 56 on both sides, and the driving cylinder 52 is provided with guide sleeves 57 on both sides. The two work together to prevent the movable plate 5 from tilting during movement, ensuring that the total length of the ultrafiltration membrane tube 7 and the membrane head 71 is consistent after assembly.

[0031] On each side of the positioning rod 3, there is a row of support seats 6 for supporting the membrane tube, which can be used to place the membrane tube 7. At this time, the two ends of the membrane tube have been coated with glue and the membrane head has been fitted. However, the bonding length of the membrane head cannot be guaranteed. Therefore, the movable plate and the fixed plate need to cooperate to adjust the bonding length of the membrane head.

[0032] The support base 6 includes a base 61, a connecting rod 62, and an arc-shaped support block 63. The base 61 has a third through hole for the connecting rod 62 to pass through. The connecting rod 62 has external threads and is fixed to the base 61 by a nut. The bottom of the arc-shaped support block 63 is fixed to the connecting rod 62, and the top has an arc-shaped support groove 64. In actual use, the height of the arc-shaped support block 63 can be adjusted according to the usage. Similarly, the position of the upper nut can be adjusted first to determine the height of the arc-shaped support block 63, and then it can be inserted into the third through hole of the base 61 and locked by the lower nut. The arc-shaped support groove 64 can support membrane tubes 7 of different specifications within a certain range. If the diameter difference of the membrane tubes 7 is too large, the arc-shaped support block can also be replaced to match different membrane tubes.

[0033] When using:

[0034] Install the positioning rod: First, screw the first locking nut 33 onto the positioning rod 3, and the first locking nut 33 can be aligned with the appropriate scale value. This scale value is the set total length H of the membrane tube 7 and the membrane heads 71 ​​at both ends. After the first locking nut 33 is in place, pass the remaining part of the positioning rod 3 through the first through hole of the fixing plate 2, and then use the second locking nut 34 to firmly fix the positioning rod 3 onto the fixing plate 2. The other end of the positioning rod 3 is supported and limited by the upper limit block 41 and the lower limit block 42.

[0035] Place the membrane tube 7 and membrane head 71 (at this time, the two ends of the membrane tube have been coated with glue and the membrane has been fitted) onto the support base 6, with one end of the membrane head 71 abutting against the fixing plate;

[0036] Start the drive cylinder 52. The cylinder rod of the drive cylinder 52 pushes the moving seat 53 to move, so that the movable plate 5 moves toward the fixed plate 2 until the movable plate 5 abuts against the end of the positioning rod 3. During the movement of the movable plate 5, it also acts on the membrane head 71, so that the membrane heads 71 ​​at both ends are firmly fitted into the membrane tube 7, and the actual total length meets the standard.

[0037] After positioning and assembly, the movable plate 5 moves back to its original position, the positioned membrane tube 7 is removed, a new membrane tube 7 is inserted, and step 3 is repeated.

[0038] For membrane tubes of the same specification, the length of positioning rod 3 does not need to be adjusted. When changing the membrane tube specification, the extension length of positioning rod 3 needs to be adjusted synchronously.

[0039] Example 2

[0040] This embodiment has the same structure as Embodiment 1, except that a pressure sensor 8 is provided on the movable plate 5, and the pressure sensor 8 is positioned opposite the end of the positioning rod 3. When the movable plate 5 moves towards the fixed plate 2, the movable plate 5 abuts against the positioning rod 3. At this time, the positioning rod 3 acts on the pressure sensor 8. When the pressure value measured by the pressure sensor 8 reaches the set value, the drive cylinder 52 stops air supply to prevent excessive or insufficient pressure from affecting the assembly quality of the membrane head 71, and further optimize the operation process.

[0041] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A positioning tool for assembling an ultrafiltration membrane tube, comprising a workbench, characterized in that: One end of the worktable is provided with a fixed plate and a positioning rod passing through the fixed plate; the fixed plate is provided with a first through hole for the positioning rod to pass through, and the positioning rod is provided with external threads on the outside and is fixed to the fixed plate by a locking nut; the other end of the worktable is provided with a movable plate and a drive mechanism for driving the movable plate to move toward the fixed plate; the side of the positioning rod is provided with at least one row of support seats for supporting the membrane tube, and membrane heads are glued to both sides of the membrane tube; the movable plate moves to abut against the positioning rod, the distance between the movable plate and the fixed plate is the set total length of the membrane tube and the membrane heads at both ends, and abuts against the membrane heads at both ends respectively.

2. The positioning fixture for assembling ultrafiltration membrane tubes as described in claim 1, characterized in that: The positioning rod has a scale bar running through the entire positioning rod along its axis, and the 0 point of the scale bar is located at the end facing the movable plate.

3. The positioning fixture for assembling ultrafiltration membrane tubes as described in claim 1, characterized in that: The workbench is provided with a positioning rod support seat, and the positioning rod support seat is provided with a second through hole for the positioning rod to pass through; the positioning rod is in a horizontal state, and its two ends are perpendicular to the movable plate and the fixed plate, respectively.

4. The positioning fixture for assembling ultrafiltration membrane tubes as described in claim 1, characterized in that: The drive mechanism includes a drive mounting base, a drive cylinder, and a moving platform. The drive cylinder is mounted on the drive mounting base, the cylinder rod of the drive cylinder is connected to the moving platform, and the movable plate is fixed on the moving platform.

5. The positioning fixture for assembling ultrafiltration membrane tubes as described in claim 4, characterized in that: The drive mounting base is equipped with a guide rail, and the moving platform is equipped with rollers that move along the guide rail below; the moving platform is equipped with guide rods on both sides, and the drive cylinder is equipped with guide sleeves on both sides, and the two work together.

6. The positioning fixture for assembling ultrafiltration membrane tubes as described in claim 1, characterized in that: The movable plate is equipped with a pressure sensor, which is positioned opposite to the end of the positioning rod.

7. The positioning fixture for assembling ultrafiltration membrane tubes as described in claim 1, characterized in that: The support includes a base, a connecting rod, and an arc-shaped support block. The base has a third through hole for the connecting rod to pass through, and the connecting rod has an external thread and is fixed to the base by a nut. The bottom of the arc-shaped support block is fixed to the connecting rod, and the top has an arc-shaped support groove.

Images