An automatic screen changer for viscous fluid filters and method of use

Abstract

The application discloses an automatic screen changer for viscous fluid filter and a use method, and relates to the technical field of automatic screen changers. The application comprises a filter host and a plurality of screen rolls, and further comprises: a storage unit arranged on the filter host; a filter unit; a monitoring unit arranged on the filter host; a screen running unit comprising a screen running drive assembly, a condensation assembly and a separation assembly. The application has the advantages that: the filter mode of the cooperation of the plurality of filter screens can realize independent replacement and continuation of the filter screen, the continuation process does not affect the normal filtration of the viscous fluid, the cooperation of the pressure monitoring and the heating melting and cooling condensation can realize automatic screen running replacement when there are more impurities on the filter screen, the screen running process is more stable, large pressure fluctuation is not generated to affect the filtration of the viscous fluid, the separation and independent discharge of the filter screen and the waste plastic plate can be realized, and the recycling and reuse of the filter screen and the waste plastic plate can be realized.

Description

Technical Field

[0001] This invention relates to the technical field of automatic screen changers, and more particularly to an automatic screen changer for viscous fluid filters and its method of use. Background Technology

[0002] A viscous fluid filter is a filter used to filter impurities in viscous fluids such as plastics, chemical fibers, rubber, adhesives, sols, and coatings. It is usually equipped with an automatic screen changer to automatically replace the filter screen during the filtration process, thereby improving the filtration efficiency of viscous fluids.

[0003] Existing automatic screen changers employ various methods to achieve automatic replacement of filter screens. For example, an automatic screen changer with publication number CN203438523U includes a screen changing body, two electro-hydraulic actuators, upper and lower sliding columns, a coarse screen, a fine screen, and a pressure sensor. The screen changing body has two axial through holes, and the upper and lower sliding columns are respectively located in the corresponding axial through holes, with screen chambers on both the upper and lower sliding columns. The left and right sides of the screen changing body, located at the center, have discharge ports and inlets, respectively. The discharge ports and inlets are connected to the screen chambers on the upper and lower sliding columns through two straight diversion channels.

[0004] Existing automatic screen changers typically use an external drive mechanism to automatically replace the filter screen. However, the length of the filter screen is limited, and once the filter screen on the drive mechanism is used up, it needs to be disassembled and replaced, which is inefficient. At the same time, this device cannot separate impurities from the filter screen, and the impurities after screen replacement adhere to the filter screen, making it impossible to reuse them.

[0005] For example, in the aforementioned prior art, the device uses an electro-hydraulic actuator to move the filter screen to achieve screen replacement. However, since the length of the filter screen that can be installed on the electro-hydraulic actuator is limited, the machine needs to be stopped and replaced when the filter screen on the electro-hydraulic actuator is used up, which affects the filtration efficiency. Furthermore, the method of using an electro-hydraulic actuator to move the filter screen will cause large pressure fluctuations, which will have a significant impact on the flow of viscous fluid inside the filter during the screen replacement process. At the same time, plastic impurities adhering to the filter screen will solidify on the filter screen during filtration, and washing cannot remove plastic impurities, making recycling impossible.

[0006] Therefore, there is an urgent need to design an automatic screen changer and its usage method for viscous fluid filters to solve the above problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides an automatic screen changer and its usage method for viscous fluid filters, thus solving the problems mentioned in the background section.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an automatic screen changer for a viscous fluid filter, comprising a filter host with an inlet and an outlet, and multiple mesh rolls composed of wound filter screens, and further comprising:

[0009] The storage unit, located on the filter host, is used to store multiple mesh rolls and to feed the filter mesh. The storage unit is equipped with an extrusion assembly for merging multiple filter meshes.

[0010] The filter unit is used to pass through the filter screen and cooperate with the viscous fluid filter to filter impurities. It includes an installation pipe and a junction box installed on the filter host. The installation pipe cooperates with the viscous fluid filter. The filter host is equipped with a monitoring unit for monitoring the pressure and temperature of the viscous fluid. When the filter screen filters the viscous fluid, it will form an adhered waste plastic plate on the filter screen.

[0011] The filter screen moving unit is used to realize the automatic movement and replacement of the filter screen. It includes a filter screen moving drive component, a condensation component and a splitting component. The filter screen moving drive component and the condensation component work together to realize the automatic movement and replacement of the filter screen. The splitting component is used to separate the waste filter screen and waste viscous fluid plate and discharge them independently.

[0012] Preferably, the extrusion assembly includes an inlet box fixedly installed on the filter host, and the inlet box cooperates with multiple filter screens. A fixing frame is fixedly installed on the inlet box, and two pressing rollers are installed on the fixing frame through two moving mechanisms. The two pressing rollers are located on both sides of the filter screens. Mesh belt limiting boxes for limiting the multiple filter screens are fixedly installed on the upper and lower parts of the fixing frame.

[0013] Preferably, the moving mechanism includes a threaded adjusting rod threadedly mounted on a fixed frame, a moving frame slidably mounted on the fixed frame, and the moving frame is rotatably connected to the end of the threaded adjusting rod. A rotating roller is rotatably mounted inside the moving frame, and a pressing roller is fixedly mounted on the rotating roller.

[0014] Preferably, the monitoring unit includes a pressure sensor fixedly installed on the filter host, the pressure sensor being used to monitor the magnitude and change of the melt pressure of the viscous fluid in the installation pipe, the filter host being provided with a heating temperature sensor for monitoring the melt temperature at the inlet end, and the filter host being provided with an inlet heating pipe for heating the filter screen at the inlet end.

[0015] Preferably, the screen conveying drive assembly includes a screen conveying box fixedly installed on the filter host, a screen conveying box fixedly installed inside the screen conveying box, and a screen conveying frame that cooperates with the screen outlet end of the filter host is provided inside the screen conveying box. An inclined guide plate is provided inside the screen conveying frame, and an auxiliary mechanism is provided inside the screen conveying box.

[0016] The wire feeding box is fixedly installed with a wire output box, and the wire output box has a wire feeding groove that matches the wire feeding frame. The wire output box is equipped with a wire feeding heating pipe for heating and melting waste plastic board, and a wire feeding temperature sensor for monitoring the temperature of waste plastic board.

[0017] Preferably, the auxiliary mechanism includes a storage cylinder fixedly installed inside the screen guide box, a piston disc slidably installed inside the storage cylinder, and the storage cylinder is filled with cooling water. A movable toothed plate is fixedly installed on the piston disc. Multiple connecting rollers are rotatably installed inside the screen guide box. Each connecting roller is fixedly installed with a driven gear and a screen guide ratchet. Each driven gear cooperates with the movable toothed plate. The screen guide frame has a communicating groove that cooperates with the multiple screen guide ratchets. Each screen guide ratchet cooperates with the filter screen.

[0018] Preferably, the condensation assembly includes a first water guide ring pipe fixedly installed in the inlet box, and a water inlet pipe for water intake is fixedly connected between the first water guide ring pipe and the inlet box. A second water guide ring pipe and a third water guide ring pipe are fixedly installed in the net box, and a water guide pipe is fixedly connected between the second water guide ring pipe and the first water guide ring pipe. A water guiding mechanism is installed on the second water guide ring pipe.

[0019] Preferably, the water diversion mechanism includes a water diversion bend fixedly connected between the second and third water diversion ring pipes, and the mesh box is located inside the second and third water diversion ring pipes. A water outlet pipe is fixedly connected to the third water diversion ring pipe, and a control valve is provided on the water outlet pipe. Multiple water diversion pipes are fixedly connected to the second water diversion ring pipe.

[0020] Preferably, the splitting component includes a net-carrying groove opened in the net-exit box, and the net-carrying groove cooperates with the net-carrying box. The net-exit box has a dispersing groove one and a dispersing groove two, and both dispersing groove one and dispersing groove two are connected to the net-carrying groove. Dispersing groove one and dispersing groove two are respectively cooperated with the waste filter screen and the waste plastic board. A cutting blade for cutting is fixedly installed in the net-exit box, and the cutting blade is located at the junction of dispersing groove one and dispersing groove two.

[0021] A method of using an automatic screen changer for a viscous fluid filter, comprising the above-mentioned automatic screen changer for a viscous fluid filter, including the following steps:

[0022] S1. First, snap the filter port on the viscous fluid filter onto the installation tube of the filter host. Then, pull out the filter screens from the multiple mesh rolls in the storage unit and insert the multiple filter screens into the filter host so that the filter screens cover the installation tube, thus completing the installation of the filter screens.

[0023] S2. Set the screen pressure and screen temperature of the viscous fluid through the monitoring unit. Set the screen pressure to no more than 10MPa above the normal value and the screen temperature to 70-120℃. Preset the heating temperature of the filter screen to be consistent with the filtration temperature of the viscous fluid. Set the screen distance and screen time. Set the screen distance to no more than 50% of the filter diameter in the installation pipe.

[0024] S3. When the monitoring unit detects that the pressure of the viscous fluid is high, the net-moving drive component in the net-moving unit will be activated to heat the waste plastic plate on the side of the filter screen so that it melts slightly. After the waste plastic plate melts into liquid, it flows to the side. At the same time, the filter screen at the rear is heated to the same temperature as the viscous fluid.

[0025] S4. When the waste plastic board 1 flows, the condensation component is activated to cool and solidify its front part. The traction force generated when the liquid solidifies pulls the filter screen horizontally, which can pull the front filtered filter screen forward and away, while pulling the clean rear filter screen into the filter host, thus completing the screen moving and screen changing process.

[0026] S5. When the filter screen is running, it will come into contact with and be squeezed by the splitting component. Under the action of the splitting component, it will be cut and layered, realizing the automatic separation of waste filter screen and waste plastic board, thus realizing the independent recycling of waste filter screen and waste plastic board.

[0027] S6. If one of the mesh rolls runs out during the mesh installation process, a new mesh roll can be replaced and inserted into the filter host after replacement. During the replacement process, there will always be a filter screen in the filter host, which will not affect the filtration process, thus achieving mesh replacement without stopping the machine.

[0028] This invention provides an automatic screen changer for viscous fluid filters and a method for using it.

[0029] It has the following beneficial effects:

[0030] 1. When replacing the filter screen, this automatic screen changer uses three sets of filter screens working together to improve filtration efficiency. Since the three sets of screen rolls are of different lengths, when one set needs to be replaced, the other two sets can still be used for filtration, allowing for screen replacement without shutting down the machine and resulting in higher filtration efficiency.

[0031] 2. When replacing the filter screen, this automatic screen changer can monitor the pressure of the viscous fluid on the filter screen in real time. If the pressure is too high, it means that there are too many impurities on the filter screen, which affects the normal filtration effect of the viscous fluid. This means that the filter screen needs to be replaced. This allows for real-time monitoring and timely replacement of the filter screen, avoiding blockage caused by excessive impurities.

[0032] 3. When replacing the filter screen, this automatic screen changer uses a method of heating and melting the waste plastic on the filter screen, allowing it to flow, and then cooling and solidifying it. The flow of the waste plastic liquid and the traction force generated by the solidified section on the unsolidified section during cooling and solidification can be used to realize the automatic movement of the filter screen, thereby realizing the automatic screen replacement operation. The entire screen replacement process does not require the intervention of external drive equipment, the screen replacement process is more stable, and there will be no large pressure fluctuations, that is, it will not affect the filtration of viscous fluids.

[0033] 4. When replacing the filter screen, this automatic screen changer can automatically separate the waste plastic sheet from the filter screen by using the cooperation of the separating blade and the first and second dispersion tanks during the melting, solidification and screen movement of the waste plastic. This allows the waste plastic sheet and the filter screen to be separated and moved during the screen movement process, thus enabling the independent recycling of the waste plastic sheet and the filter screen.

[0034] In summary, this invention utilizes a multi-set filter screen filtration method, which not only improves the filtration effect of viscous fluids but also allows for independent replacement and replenishment of the filter screens without affecting the normal filtration of the viscous fluids. Furthermore, by combining pressure monitoring with heating / melting and cooling / solidification, automated screen replacement can be achieved without external drive when there are many impurities on the filter screen. The screen movement process is more stable and does not generate significant pressure fluctuations that could affect the filtration of viscous fluids. Additionally, it enables the separation and independent discharge of the filter screens and waste plastic sheets, facilitating the recycling and reuse of both. Attached Figure Description

[0035] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0036] Figure 1 This is a schematic diagram of an automatic screen changer for a viscous fluid filter proposed in this invention;

[0037] Figure 2 for Figure 1 A schematic diagram of the structure after rotation at a certain angle;

[0038] Figure 3 for Figure 2 Top view;

[0039] Figure 4 for Figure 1 Schematic diagram of the structure of the medium-sized filter host;

[0040] Figure 5 for Figure 1 A schematic diagram of the structure after removing the filter unit;

[0041] Figure 6 for Figure 5 A schematic diagram of the structure of two filter storage boxes, filter storage box 1 and filter screen 2, and the filter screen.

[0042] Figure 7 for Figure 6 Schematic diagram of the middle fixed frame;

[0043] Figure 8 for Figure 5 Schematic diagram of the structure of the mid-path mesh cage;

[0044] Figure 9 for Figure 8 Schematic diagram of the structure of the center-running wire mesh box;

[0045] Figure 10 for Figure 9 Internal structure diagram of the center-running wire mesh box;

[0046] Figure 11 for Figure 10 Schematic diagram of the internal structure of the moving toothed plate and storage cylinder;

[0047] Figure 12 for Figure 11 The front view;

[0048] Figure 13 for Figure 5 Schematic diagram of the inlet and outlet wire mesh cages;

[0049] Figure 14 This is a schematic diagram of the condensation assembly in this invention;

[0050] Figure 15 for Figure 5 Schematic diagram of the structure of the center-exit wire mesh cage;

[0051] Figure 16 for Figure 15 A schematic diagram of the internal structure of the centrally located cage.

[0052] In the diagram: 1. Filter host, 2. Filter storage box one, 3. Filter storage box two, 4. Inlet box, 5. Junction box, 6. Filter conveyor box, 7. Filter outlet box, 8. Installation pipe, 9. Inlet pipe, 10. Waste plastic board, 11. Filter screen, 12. Pressure sensor, 13. Outlet pipe, 14. Water guide pipe, 15. Mounting frame, 16. Fixing frame, 17. Filter roll, 18. Filter belt limit box, 19. Pressing roller, 20. Threaded adjusting rod, 21. Moving frame, 22. Filter conveyor box, 23. Filter conveyor frame, 24. Inclined guide plate, 25. Storage cylinder, 26. Moving toothed plate, 27. Driven gear, 28. Filter conveyor ratchet, 29. Piston disc, 30. Connecting roller, 31. Water guide ring pipe one, 32. Water guide ring pipe two, 33. Water guide bend, 34. Water guide ring pipe three, 35. Filter conveyor temperature sensor, 36. Filter conveyor heating pipe, 37. Filter conveyor groove, 38. Dividing blade. Detailed Implementation

[0053] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0054] Example 1: Refer to Figures 1-7 An automatic screen changer for a viscous fluid filter includes a filter host 1 with an inlet and an outlet end, and multiple mesh rolls 17 formed by winding filter screens 11.

[0055] The number of wire mesh rolls 17 is set to 3, as per the instruction manual. Figure 1 As shown, the two mesh rolls 17 on both sides are the same size and have a small volume, while the mesh roll 17 in the middle is relatively small;

[0056] This automatic screen changer also includes: a storage unit, which is set on the filter host 1, for storing multiple screen rolls 17 and feeding the filter screen 11. The filter host 1 is provided with a mounting frame 15, on which two screen storage boxes 1 2 and one screen storage box 2 3 are fixedly installed. The two screen storage boxes 1 2 are used to store larger screen rolls 17, and the screen storage box 2 3 is used to store smaller screen rolls 17.

[0057] Before filtration, first take out the filter 11 from the two filter storage boxes 1 2 and one filter storage box 2 3, insert it into the inlet end of the filter host 1, and pull it out from the outlet end to complete the insertion and initial installation of the filter 11.

[0058] The filter unit is used to pass through the filter screen 11 and cooperate with the viscous fluid filter to filter impurities. The filter unit includes an installation pipe 8 and a junction box 5 set on the filter host 1. The installation pipe 8 cooperates with the viscous fluid filter. By installing the installation pipe 8 on the discharge pipe of the viscous fluid filter, the installation of this automatic screen changer and the viscous fluid filter can be completed. At this time, the filtration of impurities in the viscous fluid and the screen replacement can be realized.

[0059] During the mesh winding process, the filter screens 11 on multiple mesh rolls 17 will be gradually consumed. Since the mesh rolls 17 on both sides are larger in volume and the mesh roll 17 in the middle is smaller in volume, the mesh roll 17 in the middle will be consumed first. After the mesh roll 17 in the middle is consumed, a new mesh roll 17 can be replaced. During the replacement process, since the mesh rolls 17 on both sides are not consumed, the filter screens 11 on both sides can still perform filtering work.

[0060] When the filter screens 11 on both sides are exhausted, the newly replaced filter screen 11 in the middle has not yet been exhausted. At this time, the mesh rolls 17 on both sides can be replaced. During the replacement process, the filter screen 11 in the middle can continue to perform filtration, which can realize non-stop replacement during the mesh replenishment process and effectively improve the filtration efficiency of the viscous fluid filter.

[0061] In a further embodiment, the storage unit is provided with a pressing assembly for merging multiple filter screens 11. The pressing assembly includes a screen inlet box 4 fixedly installed on the filter host 1, and the screen inlet box 4 cooperates with multiple filter screens 11. A fixing frame 16 is fixedly installed on the screen inlet box 4, and two pressing rollers 19 are installed on the fixing frame 16 through two moving mechanisms. The two pressing rollers 19 are respectively located on both sides of the filter screens 11.

[0062] The moving mechanism includes a threaded adjusting rod 20 threadedly mounted on a fixed frame 16, a moving frame 21 slidably mounted on the fixed frame 16, and the moving frame 21 is rotatably connected to the end of the threaded adjusting rod 20. A rotating roller is rotatably mounted inside the moving frame 21, and a pressing roller 19 is fixedly mounted on the rotating roller.

[0063] When all three filter screens 11 are inserted into the filter host 1, the operator can rotate the two threaded adjustment rods 20 to move the two moving frames 21, so that the pressure rollers 19 on the two moving frames 21 come closer to each other and squeeze the two sides of the multiple filter screens 11 respectively. This applies a squeezing force to the multiple filter screens 11, making the multiple filter screens 11 stick together tightly and preventing them from separating during filtration.

[0064] Multiple filter screens 11 are attached to each other to filter viscous fluids, which can further increase the filtration effect of impurities in viscous fluids. At the same time, it is easy to replace the filter screens without stopping the machine, thereby further improving the filtration efficiency of the viscous fluid filter.

[0065] Special note: For ease of understanding, multiple filter screens 11 that are pasted together are collectively referred to as filter screen 11. That is, all filter screens 11 described below are collectively referred to as multiple filter screens 11 pasted together.

[0066] The upper and lower parts of the fixing frame 16 are fixedly installed with mesh belt limiting boxes 18 for limiting the position of multiple filter screens 11. The two mesh belt limiting boxes 18 are used to limit the position of multiple filter screens 11, making them easier to stick together, further limiting the position of filter screens 11, and improving the sticking effect of filter screens 11.

[0067] Example 2: Refer to Figures 1-4 The difference between this embodiment and embodiment one is that: the filter host 1 is equipped with a monitoring unit for monitoring the pressure and temperature of the viscous fluid, and when the filter screen 11 filters the viscous fluid, waste plastic plates 10 will be formed on the filter screen 11.

[0068] The monitoring unit includes a pressure sensor 12 fixedly installed on the filter host 1. The pressure sensor 12 is used to monitor the magnitude and change of the melt pressure of the viscous fluid in the installation pipe 8. If the pressure of the viscous fluid is detected to be large and exceeds the limit value, it means that the filter screen 11 in the filter host 1 is blocked at this time, and the viscous fluid in it does not flow smoothly, thus causing blockage. Therefore, it is determined that the screen needs to be replaced at this time.

[0069] The filter host 1 is equipped with an inlet heating pipe for heating the filter screen 11 at the inlet end. The inlet heating pipe is used to heat the clean filter screen 11 at the end of the filter host 1, increase the temperature of the filter screen 11 so that it is consistent with the temperature of the viscous fluid, avoid the cold filter screen 11 coming into contact with the hot viscous fluid when changing the screen, prevent the pressure fluctuation caused by the sudden drop in temperature, reduce the viscosity between the viscous fluid and the filter screen 11, enable the filter screen 11 to move smoothly to realize the screen changing operation, and improve the filtration stability of the viscous fluid.

[0070] The filter host 1 is equipped with a heating temperature sensor for monitoring the temperature of the melt at the inlet end. The heating temperature sensor is used to monitor the temperature of the filter screen 11 and the viscous fluid to ensure that the two temperatures can be kept consistent.

[0071] Example 3: Refer to Figures 2-5 as well as Figures 8-16 The technical difference between this embodiment and embodiment two is that: the screen-moving unit is used to realize the automatic screen-moving and replacement of the filter screen 11. The screen-moving unit includes a screen-moving drive component, a condensation component and a splitting component. The screen-moving drive component and the condensation component cooperate to realize the automatic movement and screen-moving replacement of the filter screen 11. The splitting component is used to realize the splitting and independent discharge of the waste filter screen 11 and the waste viscous fluid plate.

[0072] The screen conveying drive assembly includes a screen conveying box 6 fixedly installed on the filter host 1. A screen conveying box 22 is fixedly installed inside the screen conveying box 6, and a screen conveying frame 23 that cooperates with the screen outlet end of the filter host 1 is provided inside the screen conveying box 22. An inclined guide plate 24 is provided inside the screen conveying frame 23.

[0073] Before filtering the viscous fluid, the filter host 1 first starts the viscous fluid filter to introduce a portion of the viscous fluid, allowing it to initially circulate within the filter host 1, and seals one end of the installation pipe 8. Since the screen box 22, screen frame 23, and filter host 1 are in a connected state, the viscous fluid will flow into the screen frame 23 and fill and seal it. When viscous fluid appears at the end of the screen frame 23, the condensation component can be activated to cool the viscous fluid and solidify it. The solidified viscous fluid will solidify into waste plastic board 10 to seal the screen frame 23. After solidification, the viscous fluid in the filter host 1 will not continue to enter the screen frame 23 during filtration, and will only be filtered through the filter screen 11.

[0074] A net outlet box 7 is fixedly installed on the net outlet box 6, and a net outlet box 7 is provided with a net outlet groove 37 that matches the net outlet frame 23. A net outlet heating pipe 36 for heating and melting waste plastic board 10 is provided in the net outlet box 7, and a net outlet temperature sensor 35 for monitoring the temperature of waste plastic board 10 is provided in the net outlet box 7.

[0075] If the pressure sensor 12 detects that the pressure is too high and the screen needs to be replaced, the heating pipe 36 in the screen outlet box 7 can be activated to heat the waste plastic board 10 in the screen outlet box 7 and melt it. When the waste plastic board 10 melts, it will flow towards the screen outlet box 7 under the action of the inclined guide plate 24. When the melting flow reaches a certain extent, the condensation component can be activated to cool and solidify the melted waste plastic board 10 at the end of the screen outlet box 7.

[0076] Because the front part cools down faster and solidifies first while the rear part does not solidify, the solidified area at the front will exert a pulling force on the unsolidified area at the rear (that is, a temperature gradient is generated, and the lower temperature area generates internal stress on the higher temperature area. This internal stress causes tension or pressure to form in the liquid, so that in the subsequent solidification process, the solidified area will exert tension on the unsolidified area). That is, when the waste plastic board 10 solidifies, it will pull the filter screen 11 towards the outlet box 7, thus realizing the movement of the filter screen 11. The clogged filter screen 11 is moved into the screen conveying box 6, while the clean filter screen 11 at the rear will move into the filter host 1, thus completing the screen conveying process of the filter screen 11 and completing the replacement of the filter screen 11 in the filter host 1.

[0077] An auxiliary mechanism is provided inside the screen conveyor box 22. The auxiliary mechanism includes a storage cylinder 25 fixedly installed inside the screen conveyor box 22, a piston disc 29 slidably installed inside the storage cylinder 25, and the storage cylinder 25 is filled with cooling water. A movable toothed plate 26 is fixedly installed on the piston disc 29. Multiple connecting rollers 30 are rotatably installed inside the screen conveyor box 22. Each connecting roller 30 is fixedly installed with a driven gear 27 and a screen conveying ratchet 28. Each driven gear 27 cooperates with the movable toothed plate 26. A communicating groove is opened on the screen conveyor frame 23 to cooperate with the multiple screen conveying ratchet 28. Each screen conveying ratchet 28 cooperates with the filter screen 11.

[0078] When the heating tube 36 is activated to heat the net, some of the heat is conducted to the storage cylinder 25 inside the net box 22. The temperature of the storage cylinder 25 rises, and the cooling water inside heats up and vaporizes, thereby increasing its volume and pushing the piston disc 29 to move. When the piston disc 29 moves, it will drive the moving toothed plate 26 to move. The movement of the moving toothed plate 26 will drive multiple driven gears 27 that mesh with it to rotate. When the driven gears 27 rotate, they will drive multiple net ratchet wheels 28 to rotate under the action of multiple connecting rollers 30.

[0079] Because the mesh frame 23 has a connecting groove, the lower part of the multiple mesh ratchet 28 is inside the mesh frame 23 and in contact with the filter screen 11 inside the mesh frame 23. When the mesh ratchet 28 rotates, it will push the filter screen 11 to move, thereby further promoting the movement of the filter screen 11 and improving the mesh movement efficiency of the filter screen 11.

[0080] After the screen is moved, the cooling water in the storage cylinder 25 will cool and liquefy as the temperature decreases, thereby driving the piston disc 29 and the moving toothed plate 26 to move in the opposite direction to reset. During the reset process, the screen moving ratchet 28 will rotate in the opposite direction. Due to the shape of the screen moving ratchet 28, when it rotates in the forward direction, it will rub and squeeze the filter screen 11 to make it move in the forward direction. When it moves in the reverse direction, it will not affect the filter screen 11. That is, when the screen moving ratchet 28 rotates in the reverse direction, it will not push the filter screen 11 to move.

[0081] In a further embodiment, the condensation assembly includes a water guide ring pipe 31 fixedly installed in the inlet box 4, and a water inlet pipe 9 for water inlet is fixedly connected between the water guide ring pipe 31 and the inlet box 4. A water guide ring pipe 32 and a water guide ring pipe 34 are fixedly installed in the net box 6, and a water guide pipe 14 is fixedly connected between the water guide ring pipe 32 and the water guide ring pipe 31.

[0082] The inlet pipe 9 is connected to an external circulating water pump. When the external circulating water pump is started, cold water is pumped into the inlet pipe 9. The cold water in the inlet pipe 9 will then enter the water guide ring pipe 31 in the screen inlet box 4, thereby cooling the filter screen 11 in the screen inlet box 4.

[0083] A water-guiding mechanism is installed on the second water-guiding ring pipe 32. The water-guiding mechanism includes a water-guiding bend 33 that is fixedly connected between the second water-guiding ring pipe 32 and the third water-guiding ring pipe 34. The mesh box 22 is located inside the second water-guiding ring pipe 32 and the third water-guiding ring pipe 34. A water outlet pipe 13 is fixedly connected to the third water-guiding ring pipe 34, and a control valve is installed on the water outlet pipe 13. Multiple water-guiding pipes are fixedly connected to the second water-guiding ring pipe 32.

[0084] After circulation, the cold water in the first water guide pipe 31 will enter the second water guide pipe 32 through the water guide pipe 14, and after circulating in the second water guide pipe 32, it will enter the third water guide pipe 34 through the water guide bend 33, and after circulating in the third water guide pipe 34, it will be discharged through the outlet pipe 13, thus realizing the circulation of cold water.

[0085] When cold water circulates within the second water guide ring pipe 32 and the third water guide ring pipe 34, it cools down the internal screen box 22, thereby cooling down the filter screen 11 and waste plastic board 10 inside the screen box 22. This allows the waste plastic board 10 and the filter screen 11 to cool down quickly, enabling the molten waste plastic board 10 to cool and solidify rapidly, thus promoting the movement of the filter screen 11.

[0086] The splitting component includes a net-carrying groove 37 opened in the net-exit box 7, and the net-carrying groove 37 cooperates with the net-carrying box 22. The net-exit box 7 is provided with a dispersing groove 1 and a dispersing groove 2, and both the dispersing groove 1 and the dispersing groove 2 are connected to the net-carrying groove 37. The dispersing groove 1 and the dispersing groove 2 are respectively cooperated with the waste filter screen 11 and the waste plastic board 10. A cutting blade 38 for cutting is fixedly installed in the net-exit box 7, and the cutting blade 38 is located at the junction of the dispersing groove 1 and the dispersing groove 2.

[0087] When the waste plastic sheet 10 and the filter screen 11 are walking into the walking trough 37, when the waste plastic sheet 10 and the filter screen 11 move to the junction of the first and second dispersion troughs, they will come into contact with the dividing blade 38. Since the waste plastic sheet 10 is not completely solidified, it will be cut by the dividing blade 38 and separated from the filter screen 11 when it comes into contact with the dividing blade 38. As the filter screen 11 is walking, the waste filter screen 11 will enter the first dispersion trough, while the waste plastic sheet 10 will enter the second dispersion trough. This achieves the separation of the waste filter screen 11 and the waste plastic sheet 10, so that both the waste filter screen 11 and the waste plastic sheet 10 can be recycled independently, which can effectively avoid waste.

[0088] This invention also provides a method of using an automatic screen changer for a viscous fluid filter, comprising the following steps:

[0089] S1. First, snap the filter port on the viscous fluid filter onto the mounting tube 8 of the filter host 1. Then, pull out the filter screens 11 from the multiple mesh rolls 17 in the storage unit and insert the multiple filter screens 11 into the filter host 1 so that the filter screens 11 cover the mounting tube 8, thus completing the installation of the filter screens 11.

[0090] S2. Set the screen pressure and screen temperature of the viscous fluid through the monitoring unit. Set the screen pressure to no higher than the normal value of 10MPa and the screen temperature to 70-120℃. Preset the heating temperature of the filter screen 11 to be consistent with the filtration temperature of the viscous fluid. Set the screen distance and screen time. Set the screen distance to no more than 50% of the filter diameter inside the installation pipe 8.

[0091] S3. When the monitoring unit detects that the pressure of the viscous fluid is high, the net-moving drive component in the net-moving unit will be activated to heat the waste plastic plate 10 on the side of the filter screen 11 so that it melts slightly, and the waste plastic plate 10 melts into liquid and flows to the side. At the same time, the filter screen 11 at the rear is heated to the same temperature as the viscous fluid.

[0092] S4. When the waste plastic board 10 flows, the condensation component is activated to cool and solidify its front part. The traction force generated when the liquid solidifies pulls the filter screen 11 horizontally, pulling the front filtered filter screen 11 forward, and at the same time pulling the rear clean filter screen 11 into the filter host 1, completing the screen moving and screen changing process.

[0093] S5. When the filter screen 11 is being fed, it will come into contact with and be squeezed by the splitting component. Under the action of the splitting component, it will be cut and layered, so as to realize the automatic separation of the waste filter screen 11 and the waste plastic board 10, and realize the independent recycling of the waste filter screen 11 and the waste plastic board 10.

[0094] S6. If one of the mesh rolls 17 runs out during the mesh laying process (while the other mesh rolls 17 are not yet used up), replace it with a new mesh roll 17 and insert it into the filter host 1 after replacement. During the replacement process, the filter host 1 always has a filter screen 11 inside, which will not affect the filtration process. The replacement of other mesh rolls 17 is the same. Repeat the above mesh replacement steps to achieve mesh renewal without stopping the machine.

[0095] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic screen changer for a viscous fluid filter, comprising a filter host (1) having an inlet end and an outlet end, and multiple mesh rolls (17) formed by winding filter screens (11), characterized in that, Also includes: The storage unit is set on the filter host (1) to store multiple mesh rolls (17) and to feed the filter screen (11). The storage unit is equipped with an extrusion assembly for merging multiple filter screens (11). The filter unit is used to pass through the filter screen (11) and cooperate with the viscous fluid filter to filter impurities. It includes an installation pipe (8) and a junction box (5) set on the filter host (1). The installation pipe (8) cooperates with the viscous fluid filter. The filter host (1) is equipped with a monitoring unit for monitoring the pressure and temperature of the viscous fluid. When the filter screen (11) filters the viscous fluid, it will form an adhered waste plastic plate (10) on the filter screen (11). The screen-moving unit is used to realize the automatic screen-moving and replacement of the filter screen (11). It includes a screen-moving drive component, a condensation component and a splitting component. The screen-moving drive component and the condensation component work together to realize the automatic movement and screen-moving replacement of the filter screen (11). The splitting component is used to realize the splitting and independent discharge of the waste filter screen (11) and the waste viscous fluid plate. The screen-running drive assembly includes a screen-running box (6) fixedly installed on the filter host (1), a screen-running box (22) fixedly installed inside the screen-running box (6), and a screen-running frame (23) that cooperates with the screen outlet end of the filter host (1) is provided inside the screen-running box (22). An inclined guide plate (24) is provided inside the screen-running frame (23), and an auxiliary mechanism is provided inside the screen-running box (22). The auxiliary mechanism includes a storage cylinder (25) fixedly installed in the mesh conveyor box (22), a piston disc (29) slidably installed in the storage cylinder (25), and the storage cylinder (25) is filled with cooling water. A movable toothed plate (26) is fixedly installed on the piston disc (29). Multiple connecting rollers (30) are rotatably installed in the mesh conveyor box (22). Each connecting roller (30) is fixedly installed with a driven gear (27) and a mesh conveyor ratchet (28). Each driven gear (27) cooperates with the movable toothed plate (26). A connecting groove is provided on the mesh conveyor frame (23) to cooperate with the multiple mesh conveyor ratchets (28). Each mesh conveyor ratchet (28) cooperates with the filter screen (11).

2. An automatic screen changer for a viscous fluid filter according to claim 1, characterized in that, The extrusion assembly includes a screen inlet box (4) fixedly installed on the filter host (1), and the screen inlet box (4) cooperates with multiple filter screens (11). A fixing frame (16) is fixedly installed on the screen inlet box (4). Two screen pressing rollers (19) are installed on the fixing frame (16) through two moving mechanisms. The two screen pressing rollers (19) are located on both sides of the filter screens (11). The upper and lower parts of the fixing frame (16) are fixedly installed with mesh belt limiting boxes (18) for limiting the multiple filter screens (11).

3. An automatic screen changer for a viscous fluid filter according to claim 2, characterized in that, The moving mechanism includes a threaded adjusting rod (20) threadedly mounted on a fixed frame (16), a movable frame (21) slidably mounted on the fixed frame (16), and the movable frame (21) is rotatably connected to the end of the threaded adjusting rod (20). A rotating roller is rotatably mounted inside the movable frame (21), and a pressing roller (19) is fixedly mounted on the rotating roller.

4. An automatic screen changer for a viscous fluid filter according to claim 1, characterized in that, The monitoring unit includes a pressure sensor (12) fixedly installed on the filter host (1). The pressure sensor (12) is used to monitor the magnitude and change of the melt pressure of the viscous fluid in the installation pipe (8). The filter host (1) is equipped with a heating temperature sensor for monitoring the melt temperature at the inlet end. The filter host (1) is equipped with an inlet heating pipe for heating the filter screen (11) at the inlet end.

5. An automatic screen changer for a viscous fluid filter according to claim 2, characterized in that, The net feeding box (6) is fixedly installed with a net feeding box (7), and the net feeding box (7) is provided with a net feeding groove (37) that cooperates with the net feeding frame (23). The net feeding box (7) is provided with a net feeding heating pipe (36) for heating and melting waste plastic board (10), and the net feeding box (7) is provided with a net feeding temperature sensor (35) for monitoring the temperature of waste plastic board (10).

6. An automatic screen changer for a viscous fluid filter according to claim 5, characterized in that, The condensation assembly includes a water guide ring pipe (31) fixedly installed in the inlet box (4), and a water inlet pipe (9) for water intake is fixedly connected between the water guide ring pipe (31) and the inlet box (4). The net box (6) is fixedly installed with a water guide ring pipe (32) and a water guide ring pipe (34), and a water guide pipe (14) is fixedly connected between the water guide ring pipe (32) and the water guide ring pipe (31). A water intake mechanism is installed on the water guide ring pipe (32).

7. An automatic screen changer for a viscous fluid filter according to claim 6, characterized in that, The water intake mechanism includes a water intake bend (33) fixedly connected between the second water intake ring pipe (32) and the third water intake ring pipe (34), and the mesh box (22) is located inside the second water intake ring pipe (32) and the third water intake ring pipe (34). The third water intake ring pipe (34) is fixedly connected to a water outlet pipe (13), and a control valve is provided on the water outlet pipe (13). The second water intake ring pipe (32) is fixedly connected to multiple water intake pipes.

8. An automatic screen changer for a viscous fluid filter according to claim 1, characterized in that, The splitting component includes a net-carrying groove (37) opened in the net-exit box (7), and the net-carrying groove (37) cooperates with the net-carrying box (22). The net-exit box (7) is provided with a dispersing groove one and a dispersing groove two, and the dispersing groove one and the dispersing groove two are connected to the net-carrying groove (37). The dispersing groove one and the dispersing groove two are respectively cooperated with the waste filter screen (11) and the waste plastic board (10). A cutting blade (38) for cutting is fixedly installed in the net-exit box (7), and the cutting blade (38) is located at the junction of the dispersing groove one and the dispersing groove two.

9. A method of using an automatic screen changer for a viscous fluid filter, comprising the automatic screen changer for a viscous fluid filter as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. First, snap the filter port on the viscous fluid filter onto the mounting tube (8) of the filter host (1). Then, pull out the filter screens (11) from the multiple mesh rolls (17) in the storage unit and insert the multiple filter screens (11) into the filter host (1) so that the filter screens (11) cover the mounting tube (8) to complete the installation of the filter screens (11). S2. Set the screen pressure and screen temperature of the viscous fluid through the monitoring unit. Set the screen pressure to no more than 10 MPa above the normal value and the screen temperature to 70~120℃. Also, set the heating temperature of the filter screen (11) to be consistent with the filtration temperature of the viscous fluid. Set the screen distance and screen time. Set the screen distance to no more than 50% of the filter diameter inside the installation pipe (8). S3. When the monitoring unit detects that the pressure of the viscous fluid exceeds the limit, the net-moving drive component in the net-moving unit will be activated to heat the waste plastic plate (10) on the side of the filter screen (11) so that it melts slightly, and the waste plastic plate (10) melts into liquid and flows to the side. At the same time, the filter screen (11) at the rear is heated to the same temperature as the viscous fluid. S4. When the waste plastic board (10) flows, the condensation component is activated to cool and solidify its front part. The traction force generated when the liquid solidifies is used to pull the filter screen (11) horizontally, and the filter screen (11) after filtration at the front is pulled forward. At the same time, the clean filter screen (11) at the rear is pulled into the filter host (1) to complete the screen moving and screen changing process. S5. When the filter screen (11) is running, it will come into contact with and be squeezed by the splitting component. Under the action of the splitting component, it will be cut and layered, realizing the automatic separation of the waste filter screen (11) and the waste plastic board (10), and realizing the independent recycling of the waste filter screen (11) and the waste plastic board (10). S6. If one of the mesh rolls (17) runs out during the mesh laying process, replace it with a new mesh roll (17) and insert it into the filter host (1) after replacement. During the replacement process, the filter host (1) always has a filter screen (11) inside, which will not affect the filtration process and realize the continuous mesh laying without stopping the machine.

Images