Membrane package welding device

Abstract

The utility model relates to the technical field of filtering equipment, in particular to a membrane package welding device which comprises at least one welding piece, the welding piece is provided with a welding area, the welding area comprises an annular peripheral welding area and a hole welding area located on the inner side of a peripheral packaging area, the hole welding area corresponds to a hole packaging area, and the peripheral welding area corresponds to a peripheral packaging area; the peripheral welding area comprises a first edge and a second edge which are opposite, and a third edge and a fourth edge which are connected between the first edge and the second edge, the hole welding areas are arranged on the first edge and the second edge, and at least one side of each hole welding area is connected to the inner edge of the peripheral welding area. And an edge with a smooth curve is formed on one side far away from the peripheral welding area. According to the membrane package welding device, in the membrane package welding process, the protection effect on a filter membrane and the welding integrity can be considered, and then a welding packaging structure is flat and good in sealing performance.

Description

Technical Field

[0001] The present application relates to the technical field of filtration equipment, and in particular to a membrane package welding device. Background Art

[0002] The membrane package is an important filter element, which has a plate-and-frame overall structure. The flow channel is guided in the membrane layer through a screen or other partition components to achieve the effect of tangential flow filtration.

[0003] Common membrane package structures after disassembly Figure 2 As shown, it has several stacked membrane layers, and screens are arranged between the membrane layers, and the retentate and the permeate are separated by encapsulating different holes on the membrane layer and the screen. For the encapsulation between the screen and the membrane layer, one method is to use heat welding, and a welding sheet of thermoplastic polymer material (such as PP, etc.) is laid between the two layer structures to be welded, and the corresponding area is heated by a heat source to melt the welding sheet, thereby connecting the membrane layer and the screen together, and forming a fluid-tight encapsulation structure on a specific area of ​​the screen.

[0004] Since the membrane package welding technology is a newly developed technology, the research and development of its welding equipment is still in the progress stage. At present, enterprises usually use universal welding molds for welding in the production process. However, it is difficult for general welding molds to take into account both the uniform integrity of welding heating and the protective performance of the filter membrane, and it is easy to damage the filter membrane during the processing. Utility Model Content

[0005] The present application provides a membrane package welding device, which can take into account both the protection effect of the filter membrane and the integrity of the welding during the process of welding the membrane package, thereby forming a flat and well-sealed welding packaging structure.

[0006] In the technical solution of the present application, a membrane package welding device is provided, specifically, used for welding a membrane package having at least one filter unit, the filter unit having a packaging hole and a connecting hole, the packaging hole having a hole packaging area around the side, the filter unit having a peripheral packaging area at the edge, characterized in that it comprises at least one welding piece, the welding piece having a welding area, the welding area comprising a ring-shaped peripheral welding area and a hole welding area located inside the peripheral packaging area, the hole welding area corresponds to the hole packaging area, and the peripheral welding area corresponds to the peripheral packaging area;

[0007] The peripheral welding area includes a first side and a second side opposite to each other, and a third side and a fourth side connected between the first side and the second side. The hole welding area is arranged on the first side and the second side, and at least one side of the hole welding area is connected to the inner edge of the peripheral welding area, and an edge with a smooth curve is formed on the side away from the peripheral welding area.

[0008] In the above scheme, the filtration unit can be a structure of a single screen, or a combination of a screen and a filter membrane located on one side or both sides of the screen. A welding sheet for welding is attached to the screen. The material of the welding sheet can be a thermoplastic elastomer, such as polyethylene, polypropylene, etc. After melting under the action of the welding device, it can penetrate the screen and attach to the filter membrane on one side or both sides of the screen.

[0009] In the above scheme, the smooth curve can be a number of circular arcs, elliptical arcs or other continuous curves, which can be connected by tangent or nearly tangent arcs. Overall, as long as there is no obvious acute angle structure on its edge, it can be regarded as smooth. Furthermore, in some cases, an obtuse angle connection structure with an angle greater than 120° is adopted. Due to the fluidity of the glue itself and the fluidity of the liquid in the membrane package, the effect produced is similar to that of a rounded corner, so it can also be regarded as having a smooth connection structure.

[0010] The above-mentioned mold can be heated through a built-in electric heating pipeline, and can also be heated through an external electric heating material by controlling the mold to be heated by heat conduction, high-frequency electromagnetic heating, infrared heating, etc.

[0011] The above scheme has the following advantages. First, the welding area of ​​the above scheme is limited to the peripheral packaging area and the hole packaging area, and its overall impact on the filter membrane is small. During the welding process, it can not only ensure a good welding effect, but also reduce the impact on the filter membrane. Secondly, the above scheme adopts an integrated welding method. During the welding process, the peripheral welding area can be welded together with the hole welding area. It has good one-piece molding properties. It is not easy to produce overflow structure in the hole packaging area and the peripheral packaging area. The sealing and flatness are good, and it is easy to process and has high production efficiency. Thirdly, in the present application, a smooth welding area and welding curve are set, so that the welding structure in the membrane package is not easy to have dead angles, and thus has a better effect in filtration.

[0012] Preferably, the hole welding area has a first giving way hole corresponding to the packaging hole of the filter unit.

[0013] In this scheme, pre-reserving the first clearance hole can, on the one hand, facilitate the limiting of the packaging holes on the membrane package structure during the processing, and facilitate the insertion of structures such as the limiting pin into the membrane package structure to be processed. On the other hand, it can improve the flatness of the welding. During the welding process, the thermoplastic material can be better spread in the plane during the melting and flow process, thereby achieving better welding flatness and sealing.

[0014] Preferably, the size of the first relief hole is smaller than the size of the packaging hole on the filter unit.

[0015] In this scheme, welding can be performed first, and then the packaging hole area can be punched to obtain the packaging holes on the filter unit. Through this scheme, a flatter hole structure can be obtained, and the hole size is also more convenient to control. The uneven structure of the welding edge area can be directly punched and eliminated, making the welding structure more complete.

[0016] Preferably, the welding part has a bottom plate on the inner side of the welding area, the bottom plate and the welding area together form a groove structure, the side of the bottom plate away from the welding area has a connecting structure for connecting the welding device to other operating equipment, and the bottom plate and the welding area are integrally formed.

[0017] In the above scheme, the overall structure is stable and easy to process through the bottom plate and the connection structure on the bottom plate. In addition, the bottom plate helps to maintain the stability of the welding environment, and the filter unit to be welded is not easily affected by the external environment.

[0018] Preferably, the welding piece is provided with a vent hole connecting the inside and outside of the groove structure.

[0019] In the case of a bottom plate, during the welding process, the internal area of ​​the weldment forms a nearly closed area, which can easily lead to an increase in internal air pressure and local overheating, which can have an adverse effect on the filter membrane or screen in the non-welding area. In the above scheme, the heat dissipation on both sides of the weldment can be achieved through air holes, which can greatly improve the protection of the filter membrane without affecting the actual processing effect.

[0020] Preferably, the air holes include first air holes evenly distributed on the side walls of the groove structure, and / or second air holes arranged on the bottom plate; the ratio between the total area of ​​the air holes and the plane area of ​​the filter unit is 0.001 to 0.1:1.

[0021] In the above scheme, the first air hole and the second air hole can be set at the same time, or one of them can be set selectively. For a membrane package with a smaller volume, the first air hole may not be set, and only the second air hole may be set. This has less effect on the heat conduction in the edge area and can also achieve a good heat dissipation effect. For a membrane package with a larger area, the first air hole is usually required to be set. Since the second air hole is far away from the heating area of ​​the system, its heat dissipation effect is generally not as good as the first air hole. Therefore, adding the first air hole can ensure the heat dissipation effect inside the groove structure.

[0022] Preferably, it further comprises a welding pad, wherein the welding pad covers the surface of the welding area.

[0023] The welding pad can achieve the effect of uniform heating and uniform temperature rise, making the welding process more stable and controllable. The welding pad can be connected to the welding part by buckles or other methods, or it can be directly laid on the surface of the membrane package structure to be processed. Usually, in the process of laying the membrane package structure to be processed, the welding pad can be directly laid on both sides of the filter unit, and can be removed together with the filter unit after the processing is completed.

[0024] Preferably, it also includes a carrier platform for placing the membrane package structure to be welded, and the carrier platform is provided with a positioning device for positioning the filter unit.

[0025] In the above scheme, the positioning device can be at least one of a positioning pin structure for positioning the hole on the membrane package, or a groove structure for limiting the edge of the membrane package. It can perform preliminary positioning of the membrane package through the supporting platform to facilitate the alignment operation of the welding device.

[0026] Preferably, the positioning device comprises a positioning pin, and the positioning pin passes through the filter unit to be processed.

[0027] In this solution, the filter unit is limited by the positioning pin, which can improve the processing accuracy and make it easier to align the welded parts with the area to be welded. The positioning pin can pass through the original hole on the filter unit, such as the preset packaging hole or the connecting hole, or an additional separate hole can be set on the filter unit, and the above part can be cut in the subsequent processing.

[0028] Preferably, a positioning hole is provided on the filter unit, the positioning pin passes through the positioning hole, and the positioning hole is located outside the peripheral packaging area.

[0029] In the above scheme, the positioning pin is located on the outside of the membrane package welding area. On the one hand, the membrane package can be better positioned, and on the other hand, its structure can also directly cut the outer structure after welding is completed, which can achieve high processing efficiency and good processing quality. At the same time, in the process of removing and placing the filter unit, since the positioning pin and the positioning hole are located outside the packaging area of ​​the membrane package, a small amount of damage during the removal and placement process will not affect the overall properties of the filter unit. It only needs to cut the outside after completion, which helps to improve processing efficiency and processing yield.

[0030] Further preferably, the welding device has two welding parts, which are arranged opposite to each other and respectively located on both sides of the supporting platform; and the supporting platform has a hollow area for the two welding parts to weld the filter unit.

[0031] In this scheme, welding can be performed simultaneously from both sides of the structure to be welded. During the welding process, the screen and the filter membranes on both sides sometimes need to be welded together at the same time, and some filter membranes have poor thermal conductivity and poor heat resistance. Therefore, if single-sided welding is used, a higher temperature or a longer welding time is required to allow heat to pass through the multi-layer structure, and the non-welding side is also prone to loose welding due to temperature fluctuations. Therefore, in the above scheme, by adopting the double-sided welding process, the welding process can be completed faster and better, reducing unnecessary damage to the filter membrane.

[0032] Preferably, the positioning pin passes through at least one of the packaging hole or the communicating hole.

[0033] In the above scheme, the setting of unnecessary areas outside the filter unit can be reduced, and the existing hole structure on the filter unit can be directly used for positioning, thereby reducing the waste of the structure on the filter unit and improving the utilization rate of the membrane and the screen.

[0034] Preferably, the positioning pin passes through the packaging hole and is inserted into the first clearance hole; the inner diameter of the first clearance hole is 1.05 to 1.2 times the diameter of the positioning pin;

[0035] And / or, the welding part has a second clearance hole, the second clearance hole corresponds to the connecting hole of the filter unit, the positioning pin passes through the connecting hole and is inserted into the second clearance hole, and the inner diameter of the second clearance hole is 1.05 to 1.2 times the diameter of the positioning pin.

[0036] In the above two schemes, a first clearance hole and a second clearance hole structure slightly larger than the positioning pin are used. Therefore, during the welding process, the first clearance hole is in the welding area, and there is a certain gap between it and the positioning pin. A certain gap can be left on the inner side of the first clearance hole for the glue to squeeze in, and when the packaging hole position is subsequently processed, the relatively flat inner surface of the packaging hole is determined by punching. In the above scheme, on the one hand, the internal pores can provide the direction for the glue to overflow during welding, which is not easy to affect the internal filtering area. On the other hand, it also reduces the alignment accuracy required for the weldment and the carrier during the welding process, thereby improving the processing efficiency and reducing the processing cost.

[0037] Preferably, for the above solution, the support platform has a latch hole, and the positioning pin is movably inserted in the latch hole.

[0038] In this solution, the positioning pin is movably inserted into the pin hole, which can make it more convenient to remove the welded filter unit and place a new welded unit, further improving the processing efficiency and reducing the damage to the membrane and other structures during the removal and placement of the membrane package unit.

[0039] In another solution or a solution parallel to the above solution, the positioning device includes a positioning groove arranged on the supporting platform.

[0040] In this solution, the membrane package unit to be welded can be placed in the positioning groove, and its periphery is limited by the inner wall of the positioning groove, which has a better limiting effect, and the membrane package unit can be more conveniently operated on the assembly line during the placement process.

[0041] In the case where a positioning groove exists, if a positioning pin is provided, the positioning pin can usually be placed inside the positioning groove to achieve a positioning effect.

[0042] For the membrane package welding device involved in the above scheme, the hole welding area includes a first hole welding area connected only to one of the first edge or the second edge, and the angle occupied by the part of the first hole welding area that is in contact with the peripheral welding area on the first hole welding area is 150 to 240°; and / or, the hole welding area includes a second hole welding area that is simultaneously connected to one of the first edge or the second edge and one of the third edge or the fourth edge, and the angle occupied by the part of the second hole welding area that is in contact with the peripheral welding area on the second hole welding area is 90 to 180°.

[0043] In the above scheme, the specific shapes of the first hole welding area and the second hole welding area are defined, wherein the angle occupied by the fitting part of the first hole welding area, the second hole welding area and the peripheral welding area refers to taking the central area of ​​the first hole welding area or the second hole welding area as the vertex, and directing two rays to the edge position of the fitting area of ​​the first welding area or the second welding area and the peripheral welding area (as shown in Figure 8), thereby obtaining the angle between the two rays.

[0044] In the above scheme, the angle is limited, and the overall shape of the first hole welding area and the second hole welding area and the positional relationship between the first hole welding area and the surrounding welding area are controlled, thereby obtaining a better packaging hole structure. Under this structure, there will be no weak connection structure and sharp angle structure between the hole welding area and the surrounding welding area, which will make the area prone to welding structure fracture, solid impurities accumulation or liquid flow dead corner, and there is no need to arrange too many welding areas around, thereby improving the overall utilization rate of the prepared membrane package.

[0045] In summary, the present application provides a membrane package welding device, which has a hole welding area and a peripheral welding area connected as one, which can weld the hole and the surrounding area at the same time, forming a delicate, flat and well-sealed packaging structure around the hole and the screen, and has good membrane package welding packaging efficiency and yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of the overall appearance of the A-type membrane package;

[0047] Figure 2 It is a schematic diagram of the A-type membrane cladding structure;

[0048] Figure 3 This is a schematic diagram of the overall appearance of the B-type membrane package;

[0049] Figure 4 It is a schematic diagram of the B-type membrane cladding structure;

[0050] Figure 5 Schematic diagram of the welding parts of the liquid inlet unit of the A-type membrane package in Example 1

[0051] FIG6 is a top view of the welding parts of the liquid inlet unit and the filtrate unit of the A-type membrane package in Example 1 (the dotted line represents the internal structure), wherein: Figure 6-1 is the liquid inlet unit, and 6-2 is the filtrate unit;

[0052] Figure 7 This is a schematic diagram of the structure of the support platform corresponding to the type A membrane package in Example 1;

[0053] FIG8 is a top view of the welding parts of the liquid inlet unit and the filtrate unit of the type B membrane package in Example 1 (the dotted line represents the internal structure), wherein: Figure 8-1 is the liquid inlet unit, and 8-2 is the filtrate unit;

[0054] Fig. 9 This is a schematic diagram of the structure of the support platform corresponding to the type A membrane package in Example 2;

[0055] Fig.10 Schematic diagram of the structure of the filtration unit of the type A membrane package corresponding to Example 2;

[0056] Fig.11 This is a schematic diagram of the working conditions of various components when welding the filter unit in Example 2.

[0057] In the figure, 1, filter unit; 11, liquid inlet unit; 12, filtrate unit; 121, filtrate screen; 122, filter membrane; 13, hole packaging part; 14, peripheral packaging part; 15, packaging hole; 16, connecting hole; 17, positioning hole; 2, welding part; 21, hole welding area; 211, first hole welding area; 212, second hole welding area; 22, peripheral welding area; 231, first side; 232, second side; 241, third side; 242, fourth side; 25, first make way hole; 26, second make way hole; 27, bottom plate; 28, first air hole; 29, second air hole; 3, support platform; 31, positioning groove; 32, positioning pin; 33, pin hole; 34, hollow area. DETAILED DESCRIPTION

[0058] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0059] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0060] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present application, there are two membrane packages involved, which are respectively denoted as membrane package A and membrane package B. The two membrane packages have similar layer structures. Specifically, the layer structures of the two membrane packages include Figures 1 to 4 The unit shown, specifically, includes a liquid inlet unit 11 and a filtrate unit 12 in the membrane package, wherein the liquid inlet unit 11 is a liquid inlet screen, and the filtrate unit 12 includes a filtrate screen 121 and two filter membranes 122 arranged on both sides of the filtrate screen 121. The liquid inlet unit 11 and the filtrate unit 12 are collectively referred to as a filtration unit 1. Generally, the membrane package can be a combination of one filtrate unit 12 and two liquid inlet units 11, and can also be arranged in the form of liquid inlet units 11 and filtrate units 12 alternately stacked.

[0062] Both the liquid inlet unit 11 and the filtrate unit 12 are provided with packaging holes 15 and connecting holes 16. Since the liquid inlet unit 11 and the filtrate unit 12 are roughly rectangular, the packaging holes 15 and the connecting holes 16 can be arranged on the opposite sides of the liquid inlet unit 11 and the filtrate unit 12. Specifically, the packaging holes 15 on the liquid inlet unit 11 and the connecting holes 16 on the filtrate unit 12 are directly connected, and the packaging holes 15 on the filtrate unit 12 and the connecting holes 16 on the liquid inlet screen are directly connected. For the A-type membrane package, there is one packaging hole 15 and one connecting hole 16 on each side, and for the B-type membrane package, there are multiple packaging holes 15 and multiple connecting holes 16 on each side. On the filtrate unit 12 of the B-type membrane package, the packaging holes 15 are arranged at the four corners, and the packaging holes 15 and the connecting holes 16 are arranged alternately. For the liquid inlet unit 11, the connecting holes 16 are arranged at the four corners. Any filter unit 1 includes a hole packaging area 13 and a peripheral packaging area 14, wherein the hole packaging area 13 packages the periphery of the packaging hole 15 to form a fluid-tight barrier structure in the packaging hole 15 and the corresponding screen structure, and the peripheral packaging area 14 is used to form a fluid-tight structure in the screen edge area of ​​the filter unit 1.

[0063] In order to package the filtration unit of the above-mentioned membrane package, the present application designs the following embodiment for performing welding operations on the membrane package.

[0064] This embodiment is a membrane package welding device, which is used to weld the A-type membrane package. Figures 5 to 7 , which includes a welding part 2 and a bearing platform 3, wherein the welding part 2 is as Figure 5 As shown, it is an integrally formed metal block structure, and has a welding area for welding on the side facing the filter unit 1. In this embodiment, the welding area is an integrated flat plane, wherein the welding area includes a hole welding area 21 and a peripheral welding area 22. The hole welding area 21 is used to weld the hole packaging area 13, and the peripheral welding area 22 is used to package the peripheral packaging area 14.

[0065] like Figure 5 As shown in Figures 1 to 6, the shape of the peripheral welding area 22 is substantially the same as that of the peripheral packaging area 14, and is rectangular as a whole, having a first side 231 and a second side 232 opposite to each other, and a third side 241 and a fourth side 242 connected between the first side 231 and the second side 232. In the present application, there are only two hole welding areas 21 in the welding area, which are recorded as first hole welding areas 211 and are correspondingly arranged at two opposite inner corners on the inner side of the peripheral welding area 22. The angle occupied by the portion where the first hole welding area 211 and the peripheral welding area 22 are attached to each other on the first hole welding area 211 (i.e. Figure 6-1 and 6-2The available value range of the angle α is 150-240°. The inner sides of the hole welding area 21 and the peripheral welding area 22 form a smooth and connected inner edge curve. A first clearance hole 25 is provided at the center of the hole welding area 21, which corresponds to the position of the packaging hole 15 on the filter unit 1. Overall, the hole welding area 21 and the peripheral welding area 22 have smooth and continuous inner edges.

[0066] The inner side of the welding part 2 has a bottom plate 27, and a groove-shaped structure is formed by the bottom plate 27 and the welding area. A connection structure for connecting the operating device is provided on the back side of the bottom plate 27, which can be connected by structures such as bolts. The operating structure can be a three-axis manipulator or other operating structure, and it is only necessary to realize that the welding part 2 is close to and away from the filter unit 1. There are first air holes 28 on the side wall of the welding part 2, wherein the first air holes 28 are evenly distributed on the side wall of the welding part 2. A more stable operation and control system is formed by the bottom plate 27, and the temperature inside the welding structure is stabilized by the first air holes 28 to provide a more stable welding effect. In this embodiment, the ratio between the total cross-section of the first air holes 28 and the plane area of ​​the filter unit 1 is 0.01:1. Generally, this range can be adjusted according to the actual factory environment, and it is generally feasible within the range of 0.001 to 0.1:1. .

[0067] In this application, there are two types of welded parts, specifically Figure 6-1 and 6-2 As shown, 6-1 is used for welding the liquid inlet unit, and 6-2 is used for welding the filtrate unit.

[0068] like Figure 7 As shown, the carrier 3 is provided with a positioning device for positioning the filter unit 1. In the present embodiment, the positioning device includes a positioning groove 31 provided on the carrier 3 and a positioning pin 32 provided in the positioning groove 31. The shape of the positioning groove 31 is consistent with the shape of the frame of the welding component 2 and the peripheral shape of the filter unit 1, so that the filter unit 1 can be installed in the positioning groove 31 and the welding component 2 can be infiltrated into the positioning groove 31 for welding. A latch hole 33 is provided on the bottom surface of the positioning groove 31, and the positioning pin 32 is movably inserted in the latch hole 33 to prevent the filter unit 1 from causing certain damage to the membrane during the process of taking it. When the positioning pin 32 is arranged as shown in FIG. Figure 7As shown, the welding part 2 also has a second clearance hole 26, and the second clearance hole 26 is correspondingly arranged at the position of the connecting hole 16 of the filter unit 1. In fact, when the welding part does not have the first clearance hole or the second clearance hole, it is only necessary to cancel the setting of the positioning pin in the corresponding area. During the installation process, the positioning pin 32 passes through at least one of the packaging hole 15 or the connecting hole 16 on the filter unit 1, and is inserted into the first clearance hole 25 and the second clearance hole 26. The inner diameters of the first clearance hole 25 and the second clearance hole 26 will be slightly larger than the diameters of the positioning pin 32 to provide a certain processing accuracy tolerance. At the same time, a certain amount of margin is set inside the first clearance hole 25 to help the excess of the molten glue to overflow during the welding process, and the flatness of the welding structure around the hole can be improved after subsequent punching.

[0069] Reference Figure 8-1 and 8-2 Similarly, a similar welding structure can also be set up to encapsulate the liquid inlet unit 11 of the B-type membrane package, and it is only necessary to adjust the corresponding contour shape of the encapsulation area of ​​the B-type membrane package. It should be noted that in the welding part 2 of this scheme, since the space inside the peripheral welding area 22 is large, the first hole welding area 211 is set on its four inner corners, and the second hole welding area 212 is set between the two first hole welding areas 211 on the first side 231 and the second side 232. The angle (i.e., angle β) occupied by the part of the second hole welding area that fits the peripheral welding area 22 on the second hole welding area 212 can range from 90 to 180°. It should be noted that in order to improve the heat dissipation effect, a second air hole 29 can be set on the bottom plate 27 in this scheme, and the ratio between the total cross-sectional area of ​​the first air hole 28 and the second air hole 29 and the plane area of ​​the effective filtration area of ​​the filter unit 1 should be 0.001 to 0.1:1, so as to achieve a good heat dissipation effect. In addition, in the type B membrane package, when the corresponding filtrate unit 12 is packaged, the inner side of its peripheral welding area 22 only has the second hole welding area 212, and does not have the first hole welding area 211. The specific parameters are basically the same as the setting methods of other schemes.

[0070] In the above solution, the size of the first clearance hole 25 usually needs to be set to be slightly smaller than the size of the corresponding packaging hole 15 on the filter unit 1, so as to obtain a flatter hole packaging structure.

[0071] The welding steps of the above filter unit are as follows:

[0072] S1, placing the filter unit in the positioning groove and inserting the positioning pin. In this step, the positioning pin can be pre-inserted in the filter unit and inserted into the latch hole, or pre-placed in the latch hole to directly align the packaging hole / communication hole on the filter unit and place it. Alternatively, the filter unit can be positioned using the positioning groove first and then the latch hole can be inserted;

[0073] S2. Laying a welding pad on the upper surface of the filter unit. The welding pad can be made of a material with uniform thermal conductivity such as asbestos, and it needs to at least cover the hole packaging area and the peripheral packaging area on the filter unit, and can also further cover the entire filter unit; in addition, the welding pad can also be stacked together with the filter unit first, and then placed together on the carrier;

[0074] S3. The operating device controls the movement of the welding parts and welds the filter units to be welded. The heating of the welding parts can be achieved by a built-in or external heating tube, or by using a welding device with an electric heating function.

[0075] S4. Take out the welded filter unit and punch the inner side of the hole packaging part, or punch the inner side of the hole packaging part after all the filter units are assembled. Alternatively, the filter unit can be cooled first and then removed, and the positioning pin can be taken out together during the removal process.

[0076] Example 2, which relates to a membrane package welding device, differs from Example 1 in that it has two welding parts 2, which are respectively arranged on the upper and lower sides of a support platform 3, and the support platform 3 is adjusted to achieve a double-sided welding effect. This solution is mainly used for welding the filtrate unit 12. Since the filtrate unit 12 usually has filter membranes 122 on both sides, welding on both sides at the same time helps to improve welding efficiency and shorten welding time, thereby reducing damage to the membrane while ensuring good sealing and reliability during the welding process. Fig. 9 In the figure, the structure of the supporting platform 3 is shown by taking the A-type membrane package as an example, and for the B-type membrane package, it is only necessary to adjust its shape accordingly.

[0077] Reference Fig. 9 In this embodiment, the structure of the welding piece 2 is the same as that of the embodiment 1, and the structure of the carrier 3 is adjusted to a certain extent, as follows: the carrier 3 is no longer provided with a positioning groove 31, but a hollow area 34 is provided in its middle area, and the range of the hollow area 34 should at least cover the entire range of the peripheral packaging area 14 and the hole packaging area 13 on the filter unit 1. Usually, the hollow area 34 is a whole rectangular structure. During the welding process, the filter unit 1 is placed on the carrier 3, and the area to be welded falls into the hollow area 34. The welding piece 2 is welded from the upper and lower sides through the hollow area 34. The specific working conditions are as follows Fig.11 As shown, in this state, the overall size of the welded part 2 is generally smaller than the hollow area 34 .

[0078] Reference Fig. 9 and Fig.10In this solution, the positioning device only includes a positioning pin 32. Similar to the first embodiment, a latch hole 33 for the positioning pin 32 to be movably inserted can be provided on the carrier 3 to facilitate the picking up and placing of the filter unit 1. A positioning hole 17 is provided on the outside of the packaging area 14 around the filter unit 1. The positioning pin 32 passes through the positioning hole 17 and positions the filter unit 1. In order to improve the accuracy of positioning, 3 to 4 positioning pins 32 are usually required. Since the welding area of ​​the weldment 2 is only located at the corresponding position of the hollow area 34, there is no need to set an additional structure on the welding area for the positioning pin 32 to pass through.

[0079] The specific method of use of Example 2 is similar to that of Example 1, except that in step S4, when punching the filter unit, the outer side of the peripheral packaging area needs to be punched (i.e., extending the outer side of the peripheral packaging area). Fig.11 At least the clearance hole area needs to be punched out.

[0080] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A membrane package welding device, used for welding a membrane package having at least one filter unit, wherein the filter unit has a packaging hole and a connecting hole, the packaging hole has a hole packaging area around the side, and the filter unit edge has a peripheral packaging area, characterized in that: The device comprises at least one welding piece, wherein the welding piece has a welding area, wherein the welding area comprises a peripheral welding area in an annular shape and a hole welding area located inside the peripheral packaging area, wherein the hole welding area corresponds to the hole packaging area, and the peripheral welding area corresponds to the peripheral packaging area; The peripheral welding area includes a first side and a second side opposite to each other, and a third side and a fourth side connected between the first side and the second side. The hole welding area is arranged on the first side and the second side, and at least one side of the hole welding area is connected to the inner edge of the peripheral welding area, and an edge with a smooth curve is formed on the side away from the peripheral welding area.

2. A film package welding device according to claim 1, characterized in that: The hole welding area is provided with a first clearance hole corresponding to the packaging hole of the filter unit.

3. A film package welding device according to claim 2, characterized in that: The size of the first relief hole is smaller than the size of the packaging hole on the filter unit.

4. A film package welding device according to claim 1, characterized in that: The welding piece has a bottom plate on the inner side of the welding area, the bottom plate and the welding area together form a groove structure, the side of the bottom plate away from the welding area has a connection structure for connecting the welding device to other operating equipment, and the bottom plate and the welding area are formed in one piece.

5. The film package welding device according to claim 1, characterized in that: The welding piece is provided with an air hole communicating with the inside and outside of the groove structure.

6. A film package welding device according to claim 5, characterized in that: The air holes include first air holes evenly distributed on the side walls of the groove structure, and / or second air holes arranged on the bottom plate; the ratio between the total area of ​​the air holes and the plane area of ​​the filter unit is 0.001 to 0.1:

1.

7. A film package welding device according to claim 1, characterized in that: The invention also comprises a welding pad, wherein the welding pad covers the surface of the welding area.

8. A film package welding device according to claim 2, characterized in that: It also includes a carrier platform for placing the membrane package structure to be welded, and the carrier platform is provided with a positioning device for positioning the filter unit.

9. A film package welding device according to claim 8, characterized in that: The positioning device comprises a positioning pin which passes through the filter unit to be processed.

10. A film package welding device according to claim 9, characterized in that: The filter unit is provided with a positioning hole, the positioning pin passes through the positioning hole, and the positioning hole is located outside the peripheral packaging area.

11. A film package welding device according to claim 10, characterized in that: The welding device has two welding parts, which are arranged opposite to each other and respectively located on two sides of the bearing platform; the bearing platform has a hollow area for the two welding parts to weld the filter unit.

12. A film package welding device according to claim 9, characterized in that: The positioning pin passes through at least one of the packaging hole or the communicating hole.

13. A film package welding device according to claim 12, characterized in that: The positioning pin passes through the packaging hole and is inserted into the first clearance hole; the inner diameter of the first clearance hole is 1.05 to 1.2 times the diameter of the positioning pin; And / or, the welding part has a second clearance hole, the second clearance hole corresponds to the connecting hole of the filter unit, the positioning pin passes through the connecting hole and is inserted into the second clearance hole, and the inner diameter of the second clearance hole is 1.05 to 1.2 times the diameter of the positioning pin.

14. A film package welding device according to any one of claims 9 to 13, characterized in that: The bearing platform is provided with a latch hole, and the positioning pin is movably inserted in the latch hole.

15. The film package welding device according to claim 8, characterized in that: The positioning device comprises a positioning groove arranged on the bearing platform.

16. The film package welding device according to claim 1, characterized in that: The hole welding area includes a first hole welding area connected only to one of the first side or the second side, and the angle of the portion where the first hole welding area is attached to the peripheral welding area on the first hole welding area is 150-240°; and / or, The hole welding area includes a second hole welding area connected to one of the first side or the second side and one of the third side or the fourth side at the same time, and the angle occupied by the part of the second hole welding area that is in contact with the peripheral welding area on the second hole welding area is 90 to 180 degrees.

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