CN112140567A - Eddy current welding machine and welding method of flat filter membrane element - Google Patents
Eddy current welding machine and welding method of flat filter membrane element Download PDFInfo
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- CN112140567A CN112140567A CN201910563436.4A CN201910563436A CN112140567A CN 112140567 A CN112140567 A CN 112140567A CN 201910563436 A CN201910563436 A CN 201910563436A CN 112140567 A CN112140567 A CN 112140567A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
- B29C65/30—Electrical means
- B29C65/32—Induction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7841—Holding or clamping means for handling purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/14—Filters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses an eddy current welding machine and a method for welding a flat filter membrane element by using the same, wherein the eddy current welding machine comprises an operating platform, an eddy current heating device and a pressing block assembly; the eddy current heating device is arranged on the operating platform and used for heating the periphery of the flat filter membrane element to a weldable state; the pressing block assembly is arranged right above the eddy current heating device and used for applying pressure to the periphery of the flat sheet type filter membrane element when the periphery of the flat sheet type filter membrane element is heated to a weldable state, so that the periphery of the flat sheet type filter membrane element is welded together. According to the method, the flat-sheet filter membrane element is welded by the vortex welding machine. Compared with the originally adopted hot plate welding technology, the eddy current heating device provided by the invention has the advantages that the welding surface of the filter membrane is not easily damaged during welding, the appearance is attractive, the vacuum degree is higher, and the defective rate of products is reduced.
Description
Technical Field
The invention relates to an eddy current welding machine and a welding method of a flat filter membrane element.
Background
A Membrane Bioreactor (MBR) is a novel efficient sewage treatment process combining an efficient Membrane separation technology with a traditional biological method, has become one of the most active projects for research and development of the Membrane separation technology, and is a latest technology for treating and recycling sewage in environmental engineering. MBR has been put into use in sewage treatment projects of many countries in the world instead of traditional biological methods (activated sludge method), including municipal sewage treatment, industrial organic wastewater treatment, municipal refuse landfill leachate treatment, household effluent treatment and recycling, and at present, tens of thousands of MBR devices are put into various applications all over the world, 90% of which are used for municipal sewage treatment, and some developed countries adopt MBR technology to treat hundreds of thousands of tons of municipal sewage every day (single project).
The MBR market has huge growth potential and optimistic development prospect. This is reflected in the current major impetus for the development of the MBR market and will play a greater role in the future. These market forces include mainly stricter legislative requirements for water quality, funding and policy incentives to reduce costs, confidence in MBR technology, etc.
A key component of MBR processes is the membrane separation element. At present, membrane separation components adopted in large-scale sewage treatment engineering mainly have two forms: an immersed hollow fiber type filter membrane element and an immersed flat sheet type filter membrane element. The contrast test shows that the flat-sheet type filter membrane element for treating wastewater has the characteristics of higher membrane flux, smaller transmembrane pressure difference, long membrane cleaning period and the like under the same working condition and operation condition. And secondly, the hollow fiber type element has lower cost, but has greater difficulty in the problems of broken filaments and sludge cleaning, and the flat sheet type filter membrane element has good mechanical strength and very convenient cleaning of the surface of the filter membrane. Therefore, the immersed flat-sheet filter membrane element can be widely used for sewage treatment.
The existing manufacturing method of the flat-plate type filter membrane for the flat-plate type filter membrane element is to seal by adopting a hot plate welding technology, the hot plate welding technology is published in the eighties of the last century, and the working principle is as follows: the hot plate welder welds the plastic parts through a heating plate with intelligently controlled temperature. During welding, the heating plate is arranged between the two plastic parts, when the workpiece is tightly attached to the heating plate, the contact surface of the plastic parts starts to melt, after preset heating time is finished, the plastic on the surface to be welded of the workpiece reaches a certain melting degree, at the moment, the workpiece leaves the heating plate, the heating plate automatically moves away, then the two workpieces are rapidly combined together on the premise of external pressure application, and after certain cooling solidification time and welding depth are reached, the whole welding process is finished.
However, after the flat-sheet filter membrane element produced by adopting the hot plate welding process is welded, the membrane surface is easily damaged, the vacuum degree is low, the appearance is not attractive, and the product sale is not facilitated. Therefore, it is necessary to invent a new welding method to solve the above problems.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an eddy current welding machine and a welding method of a flat filter membrane element.
The invention solves the technical problems through the following technical scheme:
the eddy current welding machine comprises an operation table and is characterized by further comprising an eddy current heating device and a pressing block assembly;
the eddy current heating device is arranged on the operating platform and used for heating the periphery of the flat filter membrane element to a weldable state;
the pressing block assembly is arranged right above the eddy current heating device and used for applying pressure to the periphery of the flat sheet type filter membrane element when the periphery of the flat sheet type filter membrane element is heated to a weldable state, so that the periphery of the flat sheet type filter membrane element is welded together.
In this scheme, adopt above-mentioned structural style, this vortex welding machine is when the welding, and the plastics that will weld the surface all around of flat sheet formula filter membrane component heat to certain melting degree, and the work piece is rapidly combined together under the effect of briquetting subassembly, then stops the heating and makes the welding part after the cooling solidification of a period of time, takes out this flat sheet formula filter membrane component, and whole welding process is accomplished. This vortex welding machine can be applied to the flat piece formula filter membrane component of variation in size, and no area restriction, and the face of weld of flat piece formula filter membrane component is difficult for receiving the damage, reduces the defective rate of product, and the face of weld can allow the compensation simultaneously, and welding strength obtains guaranteeing, has that controllability is strong, and is nimble convenient, advantages such as product quality height.
Preferably, the vortex heating device includes vortex generator, metal pipe, heat conduction device, heating seat, heat conduction device is frame type structure, frame type structure establishes the inside all around of heating seat, heat conduction device's below is equipped with the metal pipe rather than the butt, the metal pipe with vortex generator connects.
In the scheme, the structure form is adopted, and the eddy current effect is utilized, namely the eddy current generator generates induced current which is in direct proportion to the magnetic field intensity in the metal conduit (namely eddy current which is influenced by skin effect, and the higher the frequency is, the more the eddy current is concentrated on the surface layer of the metal object, the larger the generated eddy current is). When the eddy current flows in the metal pipe, heat is generated by the principle of current thermal effect by means of the inherent resistance value of the metal pipe. This heat may not be transferred externally as in other heating methods, it is generated directly inside the object. The generated heat is transferred to a heat conduction device arranged at the periphery of the heating seat, and the plastic at the periphery of the flat sheet type filter membrane element arranged on the heating seat is melted.
Preferably, the pressing block assembly comprises a telescopic part and a pressing block part, the upper end of the telescopic part is installed above the operating platform, the pressing block part is fixed at the lower end of the telescopic part, and the telescopic part is used for driving the pressing block part to move between a first position and a second position in the vertical direction;
in the first position, the briquetting portion is located above the vortex heating device and is separated from the flat sheet type filter membrane element;
in the second position, the press block portion is in contact with and applies pressure to the flat sheet filter membrane element.
In the scheme, the pressing block assembly is composed of the telescopic part and the pressing block part, and the telescopic part enables the pressing block part to be separated from the plain-film filter membrane element or applies pressure on the plain-film filter membrane element by controlling the pressing block part to ascend or descend in the vertical direction. Before the welding part of the flat-sheet filter membrane element is heated and melted and after the welding part is cooled, the pressing block part is separated from the flat-sheet filter membrane element; after the welding part of the flat-sheet filter membrane element is heated and melted and before the welding is finished and the cooling is finished, the pressing block part applies pressure to the flat-sheet filter membrane element to weld the flat-sheet filter membrane element together.
Preferably, the heating seat is further provided with a fixing device, and the fixing device is used for preventing the flat sheet type filter membrane element from moving on the heating seat.
Preferably, the eddy current welding machine further comprises a control device, the control device comprises a touch display screen and a controller, an output end of the touch display screen is electrically connected with an input end of the controller, and an output end of the controller is electrically connected with the eddy current generator; the touch display screen is used for setting the welding temperature and the heating time of the eddy current welding machine and is controlled by the controller.
Preferably, the press block assembly is a pneumatic press block assembly, the pneumatic press block assembly is connected with the controller, and the working air pressure and the pressurization time of the pneumatic press block assembly are controlled through the touch display screen.
Preferably, the working air pressure of the pneumatic briquetting component is 3-7 KPa.
The invention also provides a method for welding the flat-sheet filter membrane element by using the eddy current welding machine, which is characterized by comprising the following steps of:
s1, horizontally placing the guide plates with the filter membranes attached to the two sides in the vortex heating device;
s2, driving the briquetting assembly to move downwards to the vortex heating device, and then compacting the filter membrane and the guide plate;
s3, starting the eddy heating device to enable the filter membrane and the guide plate to reach a weldable state, and enabling the sealing part of the filter membrane and the guide plate to be welded for a period of time;
s4, driving the briquetting assembly to leave the vortex heating device;
s5, overturning the flat filter membrane element to the other side, driving the briquetting component to move downwards to the vortex heating device, and then compacting the filter membrane and the guide plate again to weld the sealing part of the filter membrane and the guide plate for a period of time;
and S6, driving the pressing block assembly to leave the eddy current heating device, and taking out the flat sheet type filter membrane element to obtain the welded flat sheet type filter membrane element.
Preferably, the heating temperature of the eddy current heating device is 100-200 ℃.
Preferably, the welding time of the sealing part of the filter membrane and the guide plate is 5-50 s.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: the invention changes the prior hot plate welding technology applied to filter membrane welding into eddy current heating welding, compared with the originally adopted hot plate welding technology, the eddy current heating device of the invention has the advantages that the welding surface of the filter membrane is not easy to be damaged during welding, the appearance is more attractive, simultaneously, the vacuum degree is higher, and the defective rate of products is reduced.
Drawings
FIG. 1 is a schematic view of the structure of the eddy current welding machine of the present invention.
FIG. 2 is a schematic structural diagram of an eddy current heating device in the eddy current welding machine of the present invention.
Fig. 3 is a schematic structural view of a flat sheet type filter membrane element according to the present invention.
Description of reference numerals:
Vortex heating device 30
Vortex generator 301
Fixing device 305
Briquetting assembly 40
Flat sheet type filter membrane element 80
Filter membrane suction nozzle 802
Sealing part 804 between the filter membrane and the guide plate
Filter membrane bottom lining 805
Weld-on portion 806 of flat sheet type filter membrane element
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
As shown in fig. 1 to 2, an eddy current welding machine according to the present invention includes an operation table including a base frame 10 and an upper frame 20, an eddy current heating apparatus 30, and a compact assembly 40; the eddy current heating device 30 is arranged on the operation table and is used for heating the periphery of the flat sheet type filter membrane element 80 to a weldable state; the briquetting assembly 40 is installed right above the eddy current heating device 30, and is used for applying pressure to the flat filter membrane element 80 when the periphery of the flat filter membrane element is heated to a weldable state, so that the periphery of the flat filter membrane element 80 is welded together.
In this embodiment, the temperature of the eddy current heating device 30 can be controlled by the existing temperature control module, and in addition, in order to ensure better sealing quality, the contact surfaces of the eddy current heating device 30 and the pressing block assembly 40 with the flat sheet type filter membrane element 80 should be as smooth, flat and wear-resistant as possible, and made of a material that does not stick to the filter membrane 801 of the flat sheet type filter membrane element 80, for example, a layer of teflon (polytetrafluoroethylene) material can be coated on the contact surfaces. When the vortex welding machine is used for welding, plastics on the surfaces to be welded on the periphery of the flat filter membrane element 80 are heated to a certain melting degree, workpieces are rapidly combined together under the action of the pressing block assembly 40, then heating is stopped, the welding part is cooled and solidified for a period of time, the flat filter membrane element 80 is taken out, and the whole welding process is completed. This vortex welding machine can be applied to the flat piece formula filter membrane component 80 of variation in size, and no area restriction, and the face of weld of flat piece formula filter membrane component 80 is difficult for receiving the damage, reduces the defective rate of product, and the face of weld can allow the compensation simultaneously, and welding strength obtains guaranteeing, has that controllability is strong, and is nimble convenient, advantages such as product quality height.
In this embodiment, the flat sheet type filter membrane element 80 is a flat sheet type filter membrane element for MBR. Fig. 3 is a schematic structural diagram of an alternative flat-sheet filter membrane element, in which the flat-sheet filter membrane element 80 is mainly composed of a middle diversion plate 803 and filter membranes 801 on two sides of the diversion plate 803, and a filter membrane suction nozzle 802 is provided at a corner, the diversion plate 803 may be made of ABS plastic or other engineering plastics that are easy to be injection molded, and the filter membrane bottom lining 805 of the filter membrane 801 may be made of polyester or other high molecular polymers. The sealing portion 804 between the filter membrane 801 and the guide plate 803 is a frame portion where the filter membrane 801 and the guide plate 803 are to be sealed, and the welding portion 806 of the flat-sheet filter membrane element 80 is a welding portion of the flat-sheet filter membrane element 80 of the hot plate fusion machine of the present invention.
The eddy current heating device 30 includes an eddy current generator 301, a metal conduit 302, a heat conduction device 303, and a heating base 304, wherein the heat conduction device 303 is a frame structure, the frame structure is arranged inside the periphery of the heating base 304, the metal conduit 302 abutting against the heat conduction device 303 is arranged below the heat conduction device 303, and the metal conduit 302 is connected with the eddy current generator 301.
In the present embodiment, the eddy current effect is utilized, that is, the eddy current generator 301 generates the induced current proportional to the magnetic field intensity in the metal conduit 302 (that is, the eddy current is influenced by the skin effect, and the higher the frequency is, the more concentrated the surface layer of the metal object is, the larger the generated eddy current is). When eddy currents flow in the metal pipe 302, heat is generated by the principle of the current thermal effect by means of the resistance value inherent in the metal pipe 302. This heat may not be transferred externally as in other heating methods, it is generated directly inside the object. The generated heat is transferred to the heat conduction means 303 provided around the heating base 304, and the plastic around the flat sheet type filter membrane element 80 placed on the heating base 304 is melted. In this embodiment, the metal conduit 302 is a copper pipe as a heat transfer element for eddy current heating.
In order to monitor the temperature of the heat conduction device 303 in real time, a temperature sensing device 306 may be mounted on the heat conduction device 303.
The briquetting assembly 40 comprises a telescopic part 401 and a briquetting part 402, the upper end of the telescopic part 401 is installed above the operating platform, the briquetting part 402 is fixed at the lower end of the telescopic part 401, and the telescopic part 401 is used for driving the briquetting part 402 to move between a first position and a second position in the vertical direction; in the first position, the press block 402 is located above the vortex heating apparatus 30 and is separated from the flat sheet filter membrane element 80; in the second position, the press block portion 402 is in contact with and applies pressure to the flat sheet filter membrane element 80.
In the present embodiment, the membrane holder assembly 40 is composed of two parts, i.e., a telescopic part 401 and a membrane holder part 402, and the telescopic part 401 controls the membrane holder part 402 to ascend or descend in the vertical direction, so that the membrane holder part 402 is separated from the flat sheet type filter membrane element 80 or applies pressure to the flat sheet type filter membrane element 80. Before the welding part of the flat-sheet filter membrane element 80 is heated and melted and after the welding part is cooled, the pressing block part 402 is separated from the flat-sheet filter membrane element 80; after the welding portion of the flat sheet type filter membrane element 80 is heated and melted and before the welding is completed and the cooling is completed, the press block portion 402 applies pressure to the flat sheet type filter membrane element 80, so that the flat sheet type filter membrane element 80 is welded together.
The heating base 304 is also provided with a fixing means 305, and the fixing means 305 is used for preventing the flat sheet type filter membrane element 80 from moving on the heating base 304. In this embodiment, the fixing device 305 is composed of a plurality of limiting blocks distributed around the heating base 304, the limiting blocks can be controlled to move back and forth, and a space for placing the flat sheet type filter membrane element 80 is formed during the working state, so that the flat sheet type filter membrane element is prevented from moving.
The eddy current welding machine further comprises a control device, the control device comprises a touch display screen 70 and a controller, the output end of the touch display screen 70 is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the eddy current generator 301; the touch display screen 70 is used for setting the welding temperature and the heating time of the eddy current welding machine and is controlled by the controller.
In this embodiment, to fulfill the need for automation, the eddy current welder of the present invention includes a variety of common components that meet the need for automation, such as: a touch display screen 70 for the control operation of the operator can be arranged on the upper bracket 20 at the upper part of the upper bracket, the touch display screen 70 can be used for controlling the eddy current welding machine and displaying various working parameters such as heating temperature, welding time and the like, a controller can be arranged in the upper bracket 20, the controller is connected with the touch display screen 70 and executes various instructions input by the touch display screen 70; the lower part of the device can be designed as a chassis 10, the eddy current heating device 30 can be arranged on the chassis 10, and the chassis 10 can also be provided with an operation button 60, a power switch 50 and the like.
The press block assembly 40 is a pneumatic press block assembly, and the pneumatic press block assembly is connected with the controller and controls the working air pressure and the pressurizing time of the pneumatic press block assembly through the touch display screen 70. The working air pressure of the pneumatic briquetting component is 3-7 KPa.
The invention also provides a method for welding a flat filter membrane element by using the eddy current welding machine, which comprises the following steps:
s1, placing the guide plates 803 with the filter membranes 801 attached to the two sides in the vortex heating device 30;
s2, driving the press block assembly 40 to move downwards to the vortex heating device 30, and then compacting the filter membrane 801 and the guide plate 803;
s3, starting the eddy heating device 30 to enable the filter membrane 801 and the guide plate 803 to be in a weldable state, and enabling the sealing part of the filter membrane 801 and the guide plate 803 to be welded for a period of time;
s4, driving the press block assembly 40 to leave the vortex heating device 30;
s5, turning the flat filter membrane element 80 to the other side, driving the press block assembly 40 to move downwards to the vortex heating device 30, then pressing the filter membrane 801 and the guide plate 803 again, and welding the sealing part of the filter membrane 801 and the guide plate 803 for a period of time;
and S6, driving the press block assembly 40 to leave the vortex heating device 30, and taking out the flat filter membrane element 80 to obtain the welded flat filter membrane element 80.
The heating temperature of the eddy current heating device 30 is 100-200 ℃. The welding time of the sealing part of the filter membrane 801 and the guide plate 803 is 5-50 s.
The eddy current welding machine can be carried out through the following steps when in specific work:
A. turning on a power switch 50, and enabling the eddy current welding machine to enter a working state;
B. opening the touch display screen 70, setting and adjusting operating parameters such as the power of the eddy current welding machine, the heating temperature, the working air pressure of the briquetting assembly 40, the welding time and the like, and simultaneously displaying a set numerical value on the display interface of the touch display screen 70;
C. the flat-sheet type filter membrane element 80 to be processed is placed on a heating base 304 of an eddy current welding machine, and a fixing device 305 moves forwards to fix the flat-sheet type filter membrane element 80;
D. pressing the operation button 60 to start the pneumatic system, moving the pressing block assembly 40 downward, pressing and welding the pressing part 402 to the welding part of the flat-sheet type filter membrane element 80, and simultaneously heating the eddy current heating device 30 below the flat-sheet type filter membrane element 80;
E. when the power, the heating temperature and the welding time of the eddy current welding machine reach preset set parameters, the briquetting assembly 40 is automatically lifted, and the fixing device 305 moves backwards and returns to the initial position;
F. and taking out the flat-sheet filter membrane element 80, manually turning the flat-sheet filter membrane element 80 to enable the unprocessed back surface to be upward, putting the flat-sheet filter membrane element on the heating seat 304 of the eddy current welding machine again, pressing the operation button 60 again to perform a new eddy current welding process, and entering a next product quality testing program after the most main sealing process of the whole flat-sheet filter membrane element 80 is completed.
The invention changes the original hot plate welding technology into eddy current welding, so that the flat-sheet type filter membrane element 80 with a more precise and complex structure adopts an efficient eddy current welding process to realize better welding effect, the strength of the welding position of the filter membrane is higher after welding, the welding surface is not easy to be damaged, the appearance is more attractive, and the vacuum degree is higher. By taking the SINAP150 flat-sheet filter membrane element of Haosnapu membrane separation technology, Inc. as an example, after the technology of the invention is adopted, the qualification rate of processed products is improved by more than 2 times, and the product quality is very stable. The results of testing SINAP150 flat sheet filter membrane elements processed from 6 batches are shown in table 1:
table 1: detection result of SINAP150 type flat sheet type filter membrane element
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. The eddy current welding machine comprises an operation table and is characterized by further comprising an eddy current heating device and a pressing block assembly;
the eddy current heating device is arranged on the operating platform and used for heating the periphery of the flat filter membrane element to a weldable state;
the pressing block assembly is arranged right above the eddy current heating device and used for applying pressure to the periphery of the flat sheet type filter membrane element when the periphery of the flat sheet type filter membrane element is heated to a weldable state, so that the periphery of the flat sheet type filter membrane element is welded together.
2. The eddy current welding machine according to claim 1, wherein the eddy current heating device comprises an eddy current generator, a metal conduit, a heat conduction device and a heating base, the heat conduction device is of a frame-shaped structure, the frame-shaped structure is arranged inside the periphery of the heating base, the metal conduit abutted against the heat conduction device is arranged below the heat conduction device, and the metal conduit is connected with the eddy current generator.
3. The eddy current welding machine according to claim 2, wherein the pressure block assembly comprises a telescopic part and a pressure block part, the upper end of the telescopic part is installed above the operation table, the lower end of the telescopic part is fixed with the pressure block part, and the telescopic part is used for driving the pressure block part to move between a first position and a second position in the vertical direction;
in the first position, the briquetting portion is located above the vortex heating device and is separated from the flat sheet type filter membrane element;
in the second position, the press block portion is in contact with and applies pressure to the flat sheet filter membrane element.
4. The vortex welding machine of claim 3 wherein said heating base is further provided with a fixture for preventing said flat sheet filter membrane element from moving on said heating base.
5. The eddy current welding machine according to claim 2, further comprising a control device, wherein the control device comprises a touch display screen and a controller, an output end of the touch display screen is electrically connected with an input end of the controller, and an output end of the controller is electrically connected with the eddy current generator; the touch display screen is used for setting the welding temperature and the heating time of the eddy current welding machine and is controlled by the controller.
6. The eddy current welding machine according to claim 5, wherein the pressure block assembly is a pneumatic pressure block assembly, the pneumatic pressure block assembly is connected with the controller, and the working air pressure and the pressurization time of the pneumatic pressure block assembly are controlled through the touch display screen.
7. The eddy current welding machine according to claim 6, wherein the working air pressure of the pneumatic pressure block assembly is 3-7 KPa.
8. A method of welding a flat sheet filter membrane element using an eddy current welder according to any one of claims 1-7, characterized in that the method comprises the steps of:
s1, horizontally placing the guide plates with the filter membranes attached to the two sides in the vortex heating device;
s2, driving the briquetting assembly to move downwards to the vortex heating device, and then compacting the filter membrane and the guide plate;
s3, starting the eddy heating device to enable the filter membrane and the guide plate to reach a weldable state, and enabling the sealing part of the filter membrane and the guide plate to be welded for a period of time;
s4, driving the briquetting assembly to leave the vortex heating device;
s5, overturning the flat filter membrane element to the other side, driving the briquetting component to move downwards to the vortex heating device, and then compacting the filter membrane and the guide plate again to weld the sealing part of the filter membrane and the guide plate for a period of time;
and S6, driving the pressing block assembly to leave the eddy current heating device, and taking out the flat sheet type filter membrane element to obtain the welded flat sheet type filter membrane element.
9. The method for welding a flat sheet filter membrane element by an eddy current welding machine according to claim 8, wherein the heating temperature of the eddy current heating device is 100 to 200 ℃.
10. The method for welding a flat filter membrane element by using an eddy current welding machine as claimed in claim 8, wherein the welding time of the sealing part of the filter membrane and the guide plate is 5-50 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910563436.4A CN112140567A (en) | 2019-06-26 | 2019-06-26 | Eddy current welding machine and welding method of flat filter membrane element |
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| CN201910563436.4A CN112140567A (en) | 2019-06-26 | 2019-06-26 | Eddy current welding machine and welding method of flat filter membrane element |
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| CN201910563436.4A Withdrawn CN112140567A (en) | 2019-06-26 | 2019-06-26 | Eddy current welding machine and welding method of flat filter membrane element |
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| CN (1) | CN112140567A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173052A (en) * | 2010-12-08 | 2011-09-07 | 上海斯纳普膜分离科技有限公司 | Hot plate welding machine and flat type filter membrane element sealing method |
| CN106113487A (en) * | 2016-08-24 | 2016-11-16 | 余姚市亿荣自动化科技有限公司 | Plastic plate or plastic sheeting eddy current pulse welding mechanism |
-
2019
- 2019-06-26 CN CN201910563436.4A patent/CN112140567A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173052A (en) * | 2010-12-08 | 2011-09-07 | 上海斯纳普膜分离科技有限公司 | Hot plate welding machine and flat type filter membrane element sealing method |
| CN106113487A (en) * | 2016-08-24 | 2016-11-16 | 余姚市亿荣自动化科技有限公司 | Plastic plate or plastic sheeting eddy current pulse welding mechanism |
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Application publication date: 20201229 |
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