Automatic screen changing device

Abstract

The invention relates to the technical field of viscous fluid filters, in particular to an automatic screen changing device. The discharging mechanism is arranged on the bottom plate and is used for providing a filter screen for the filtering mechanism; the rotating mechanism is arranged on the discharging mechanism, one end of the rotating mechanism is connected with the discharging mechanism, and the rotating mechanism is used for changing the position of the discharging mechanism; the pushing mechanism is arranged on the discharging mechanism, a moving mechanism is arranged at the output end of the pushing mechanism, the moving mechanism is connected with the other end of the rotating mechanism, a pressure detection module electrically connected with the pushing mechanism is arranged on the contact face of the moving mechanism and the filter screen, and the pushing mechanism can synchronously drive the discharging mechanism to move when pushing the moving mechanism to move. The output length between the filter screen and the filter mechanism is changed, and the filter screen is lengthened. The problems that the screen is easy to loosen and the filtering effect is poor due to manual adjustment are solved, the screen replacement action can be completed without shutdown, the filtering continuity and precision and the production efficiency are improved, and the continuous and automatic production requirements are met.

Description

Technical Field

[0001] This invention relates to the field of viscous fluid filter technology, specifically to an automatic screen changing device. Background Technology

[0002] Viscous fluid filters are filtration devices used for high-viscosity fluids, such as molten plastics, resin colloids, and chemical slurries. They intercept impurities, unmelted particles, or gels in the fluid through a filter screen, ensuring fluid purity. They are widely used in industrial scenarios that require continuous filtration of viscous media, such as plastic extrusion, rubber molding, and paint production.

[0003] Patent application number 202411549147.6 discloses an automatic screen changer and its usage method for a viscous fluid filter. This invention relates to the technical field of automatic screen changers. The invention includes a filter host and multiple screen reels, and further includes: a storage unit disposed on the filter host; a filter unit; a monitoring unit disposed on the filter host; and a screen conveying unit, which includes a screen conveying drive assembly, a condensation assembly, and a splitting assembly. The advantages are: by utilizing a filtration method with multiple sets of filter screens working together, independent replacement and refilling of the filter screens can be achieved without affecting the normal filtration of the viscous fluid; by using a combination of pressure monitoring and heating / melting / cooling / solidification, automated screen conveying and replacement can be achieved when there are many impurities on the filter screen; the screen conveying process is more stable and will not produce large pressure fluctuations that would affect the filtration of the viscous fluid; it can also separate and independently discharge the filter screen and waste plastic sheet, enabling the recycling and reuse of both the filter screen and the waste plastic sheet.

[0004] The current design requires manual adjustment of the filter screen and cannot be dynamically adjusted in real time during equipment operation. This design flaw leads to filter screen loosening during screen replacement after long-term operation, severely affecting the filter screen tension and filtration efficiency, and failing to meet the requirements of continuous and automated production for filtration accuracy and stability. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic screen changing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic screen changing device for automatically changing the filter screen of viscous fluid in a filtration mechanism, comprising: Base plate; A discharge mechanism, which is located on the base plate, is used to provide the filter screen to the filtration mechanism; A rotating mechanism is provided on the discharge mechanism, with one end connected to the discharge mechanism, and is used to change the position of the discharge mechanism; A pushing mechanism is provided on the discharge mechanism. The output end of the pushing mechanism is provided with a moving mechanism. The moving mechanism is connected to the other end of the rotating mechanism. The moving mechanism is in contact with the filter screen. A pressure detection module is provided on the contact surface between the moving mechanism and the filter screen. The pressure detection module is electrically connected to the pushing mechanism. The pressure detection module is used to detect the pressure level of the filter screen. When the pressure of the filter screen is lower than the preset value, the pushing mechanism can simultaneously drive the discharging mechanism to move, changing the output length between the filter screen and the filtering mechanism, and lengthening the filter screen.

[0007] Preferably, an electrical box is provided on the base plate, and the electrical box is connected to the pushing mechanism; The pushing mechanism includes: an air pump mounted on the electrical box, the air pump having a built-in push rod, and a connecting pad on the output end of the push rod.

[0008] Preferably, the moving mechanism and the pushing mechanism are connected, and a second sliding groove is provided on the base plate; The moving mechanism includes: a push plate connected to the pushing mechanism, a third slide groove provided on the push plate, the third slide groove being connected to the filtering mechanism, and a second limiting strip provided on one side of the push plate, the second limiting strip being connected to the second slide groove; A movable rod is also inserted into the push plate. One end of the movable rod is connected to the connecting shell. A bending rod is provided in the connecting shell, which is used to change the output angle of the filter screen. A first compression spring is also provided between the connecting shell and the push plate, and the first compression spring is used to reset the bent rod. The base plate is provided with the movable rod, the connecting shell, the bending rod and the first anti-compression spring, and is arranged opposite to the third sliding groove, for squeezing the filter screen and increasing the tension of the filter screen.

[0009] Preferably, a first groove is provided on the base plate, and the first groove is connected to the discharge mechanism; The discharge mechanism includes: a housing, a first limiting strip on one side of the housing, and the first limiting strip being inserted into the first sliding groove; The outer shell is provided with a discharge groove, and connecting rods are provided on both sides of the discharge groove. The outer side of the connecting rods is provided with mounting holes. Both the connecting rod and the mounting hole are used to connect guide strips for guiding the direction of the filter screen; The outer casing is provided with a storage roller for storing unused filters; The outer casing has a connecting plate for connecting the rotating mechanism on the side near the rotating mechanism.

[0010] Preferably, the guide strip includes a first mounting cylinder and a second mounting cylinder, the first mounting cylinder is connected to the connecting rod, and the first mounting cylinder is disposed in the mounting hole, which allows the guide strip to rotate on the connecting rod; The second mounting cylinder is also provided with a limiting plate and a top plate on one side, which are used to guide the filter screen to bend after it is discharged from the discharge trough; The top plate and the first mounting cylinder are connected to brackets.

[0011] Preferably, the base plate is provided with a sleeve rod, a sleeve is sleeved on the sleeve rod, the sleeve is hollow, and a plug rod is sleeved in the sleeve, and the end of the plug rod is provided with a connecting sleeve. The sleeve, the plug rod, and the connecting sleeve are at least one and are arranged in mirror image opposite each other; All of the connecting sleeves are respectively provided on the discharge mechanism and the moving mechanism.

[0012] Preferably, the filtration mechanism has a main body, and the main body has an inlet and an outlet. A limiting connecting plate is provided on the main body near the inlet, and the limiting connecting plate is used to connect with the third sliding groove; A support plate is provided next to the inlet, and a guide roller is connected to the support plate to guide the filter screen into the inlet; A scraper is provided on the main body near the outlet side, and the scraper is used to scrape off the viscous fluid adhering to the filter screen.

[0013] Preferably, the main body is provided with a feed inlet, a cooling mechanism is provided on one side of the main body, and a heating mechanism is provided on the other side of the cooling mechanism; The cooling mechanism is used to cool the filtered screen, and the heating mechanism is used to heat the filtered screen.

[0014] Preferably, a clamping roller and a take-up roller are provided on one side of the base plate; The take-up roller is equipped with a motor for driving the take-up roller to rotate, and the motor and the take-up roller are also equipped with gears. The motor is located on the other side of the base plate. The clamping roller is connected to a transmission roller, which is inserted into the base plate. The transmission roller is also equipped with a gear and a pulley. The gear on the clamping roller meshes with the gear on the net-collecting roller. Furthermore, there are at least two clamping rollers, arranged in a mirror image opposite each other, with the two relatively mirror-image gears meshing with each other; A transmission belt is fitted onto each of the non-mirror adjacent pulleys, which synchronously drives all the clamping rollers to rotate.

[0015] Preferably, the cooling mechanism includes a loading mechanism, and the loading mechanism is equipped with a cooling pipe; The cooling pipe is coiled in the cooling mechanism and is used to cool the viscous fluid that adheres to the filter screen.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the automatic screen changing device, through the coordinated design of the discharge mechanism, the rotating mechanism, the pushing mechanism and the moving mechanism, realizes the real-time automatic adjustment and screen changing of the filter screen during equipment operation, solves the problem of easy loosening and poor filtration effect caused by manual adjustment, and can complete the screen changing action without stopping the machine, thereby improving the continuity, accuracy and production efficiency of filtration and meeting the needs of continuous and automated production. Attached Figure Description

[0017] Figure 1 This is a top view of the structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A; Figure 3 This is a schematic diagram of the side structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the material discharge mechanism in this invention; Figure 6 This is a schematic diagram of the guide strip structure in this invention; Figure 7 This is a schematic diagram of the pushing mechanism in this invention; Figure 8 This is a schematic diagram of the inlet end structure of the filtration mechanism in this invention; Figure 9 This is a schematic diagram of the outlet section structure of the filtration mechanism in this invention; Figure 10 This is a schematic diagram of the bottom structure of the base plate in this invention; Figure 11 This is a schematic diagram illustrating the operating trajectory of the filter screen according to the present invention.

[0018] In the diagram: 1. Base plate; 11. First chute; 12. Electrical box; 13. Second chute; 2. Discharge mechanism; 21. Outer shell; 211. First limiting strip; 212. Discharge chute; 22. Connecting rod; 23. Mounting hole; 24. Receiving roller; 25. Guide strip; 251. First mounting cylinder; 252. Second mounting cylinder; 253. Limiting plate; 254. Top plate; 255. Bracket; 26. Connecting plate; 3. Rotating mechanism; 31. Sleeve rod; 32. Sleeve; 33. Insert rod; 34. Connecting sleeve; 4. Moving mechanism; 41. Push plate; 42. Third chute; 43. Second limiting strip; 4 4. Movable rod; 45. Connecting shell; 46. Bending rod; 47. First anti-compression spring; 5. Pushing mechanism; 51. Air pump; 52. Push rod; 53. Connecting pad; 6. Filtering mechanism; 61. Main body; 62. Limiting connecting plate; 63. Bearing plate; 64. Guide roller; 65. Inlet; 66. Feed inlet; 67. Cooling mechanism; 68. Loading mechanism; 681. Cooling pipe; 69. Heating mechanism; 610. Scraper; 611. Outlet; 7. Clamping roller; 8. Net taking roller; 9. Motor; 91. Gear; 92. Pulley; 93. Transmission belt; 94. Transmission roller; 10. Filter screen. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-11 The present invention provides a technical solution: an automatic screen changing device, which is used for a viscous fluid filter to replace the filter screen 10 in the filter mechanism 6. The filter screen 10 can filter the viscous fluid through the filter mechanism 6. At this time, when the filter screen 10 is changed, some viscous fluid will stick to the old screen and be carried out, causing unnecessary waste of materials. The automatic screen changing device includes a base plate 1, a discharge mechanism 2, a rotating mechanism 3, and a pushing mechanism.

[0021] The base plate 1 supports the remaining structures. An electrical box 12 is mounted on the base plate 1, supplying power to the air pump 51. The electrical box 12 is connected to the pushing mechanism 5. A first sliding groove 11 is provided on the base plate 1, allowing the discharge mechanism 2 to move on the base plate 1. The position change of the discharge mechanism 2 is opposite to the position change of the pushing plate 41, thus changing the length of the output path of the filter screen 10. When the filter mechanism 6 is working normally, extending the output path of the filter screen 10 and pulling it allows control of the tightness of the filter screen 10. The first sliding groove 11 and the discharge mechanism 5... Mechanism 2 is connected. A clamping roller 7 and a collecting roller 8 are provided on one side of the base plate 1. The clamping roller 7 is used to clamp and transport waste material that has detached from the filter screen 10, thus providing some of the power for moving and changing the screen. The collecting roller 8 rotates to collect the used filter screen 10, also providing some of the power for changing the screen. A motor 9 is provided on the collecting roller 8. The motor 9 directly drives the collecting roller 8 to rotate and also drives the clamping roller 7 to rotate. The clamping roller 7 rotates inwards in a mirror image to ensure that the waste material can be moved. It drives the collecting roller 8 to rotate. Gears 91 are also provided on the motor 9 and the collecting roller 8. Gears 91 are positioned relative to each other. The meshing of the clamping rollers is used to achieve the transmission effect. The motor 9 is located on the other side of the base plate 1. The connecting end of the clamping roller 7 is provided with a transmission roller 94, which is inserted into the base plate 1. The transmission roller 94 is also provided with a gear 91. The gears 91 connected to the clamping roller 7 are also meshed with each other. This is to ensure that the mirror-set clamping roller 7 can rotate in opposite directions, ensuring that it can act on the waste material. A pulley 92 is also provided. The gears 91 on the clamping roller 7 and the gears 91 on the collecting roller 8 mesh with each other. There are at least two clamping rollers 7, which are arranged in a mirror image. The two mirror-image gears 91 mesh with each other. The non-mirror adjacent pulleys A transmission belt 93 is fitted onto 92. The inner side of the transmission belt 93 is provided with serrations, and the outer side of the pulley 92 is also provided with serrations. The serrations on the outer side of the pulley 92 and the serrations on the inner side of the transmission belt 93 mesh with each other. Thus, the power transmitted by the transmission belt 93 is in the same ratio as the power transmitted by the gear 91 and the pulley 92, so there will be no speed conflict. The upper and lower pulleys 92 will also rotate inward synchronously through meshing. Only the two adjacent pulleys 92 on the left and right sides rotate through the meshing of the transmission belt 93, synchronously driving all the clamping rollers 7 to rotate. This design allows all the clamping rollers 7 to rotate synchronously, and the dragging friction force applied to the waste material is consistent.

[0022] The base plate 1 supports the electrical box 12, the pushing mechanism 5, the discharging mechanism 2, and other structures. The electrical box 12 provides energy to the air pump 51 and connects to the pushing mechanism 5. The first slide groove 11 on the base plate 1 allows the discharging mechanism 2 to move to adjust the output path of the filter screen 10. The tension control of the filter screen 10 is achieved in conjunction with the position change trajectory of the pushing plate 41. The clamping roller 7 and the collecting roller 8 are driven by the motor 9. The gear 91, pulley 92, transmission belt 93, and transmission roller 94 realize the power transmission, so that the mirror-opposite clamping roller 7 rotates synchronously in opposite directions to clamp the waste material, and the collecting roller 8 rotates to collect the filter screen 10, thus completing the automatic replacement of the viscous fluid filter screen 10 and reducing the residue of viscous fluid in the old screen.

[0023] Please see Figures 5-6 The discharge mechanism 2, located on the base plate 1, provides filter screens 10 to the filter mechanism 6. The discharge mechanism 2 includes three receiving rollers 24. The filter screens 10 are stacked in three layers during use. The discharge mechanism 2 includes: a housing 21, which supports the three receiving rollers 24 and allows them to move synchronously; a first limiting strip 211 on one side of the housing 21, connected to a first sliding groove 11, which moves along the direction of the first sliding groove 11; and a discharge chute 212 on the top, allowing the three receiving rollers 10 to pass through. The filter screen 10 of the layer is detached from the outer shell 21. Connecting rods 22 are provided on both sides of the discharge trough 212. The connecting rods 22 are used to connect the guide strips 25. The outer side of the connecting rods 22 is provided with mounting holes 23. The mounting holes 23 are opened on the outer shell 21 and close to the connecting rods 22. The mounting holes 23 are used to adapt to the connection on the first mounting cylinder 251. Both the connecting rods 22 and the mounting holes 23 are used to connect the guide strips 25 used to guide the direction of the filter mechanism 6. The outer shell 21 is provided with a receiving roller 24 for storing unused filter screens 10. The side of the outer shell 21 near the rotating mechanism 3 is provided with a connecting plate 26 for connecting the rotating mechanism 3. The connecting plate 26 is used to connect with the rotating mechanism 3.

[0024] The discharge mechanism 2 carries three receiving rollers 24 through the outer shell 21 to achieve synchronous supply of three layers of filter screen 10. The first limiting strip 211 on the outer shell 21 is inserted into the first sliding groove 11 of the base plate 1, allowing the discharge mechanism 2 to move and adjust its position along the direction of the first sliding groove 11. The discharge groove 212 ensures that the three layers of filter screen 10 are detached from the outer shell 21. The connecting rod 22 and the mounting hole 23 are connected to the guide strip 25, which is used to guide the output direction of the filter screen 10. The connecting plate 26 is connected to the rotating mechanism 3 to achieve linkage with the rotating mechanism 3, and finally completes the stable supply, position adjustment and direction guidance of the filter screen 10.

[0025] The guide strip 25 includes a first mounting cylinder 251 and a second mounting cylinder 252. Both the first mounting cylinder 251 and the second mounting cylinder 252 are used to connect the guide strip 25 to the connecting rod 22, and the guide strip 25 can rotate on the connecting rod 22. The first mounting cylinder 251 is connected to the connecting rod 22 and is located in the mounting hole 23, which allows the guide strip 25 to rotate on the connecting rod 22. A limiting plate 253 and a top plate 254 are also provided on one side of the second mounting cylinder 252. The top plate 254 is used to limit the upper and lower sides of the filter screen 10. The filter screen 10 is supported and used to guide the filter screen 10 to bend after it is discharged from the discharge trough 212. The limiting plate 253 is used to limit the two sides of the filter screen 10. When the positions of the discharge mechanism 2 and the moving mechanism 4 change, the angle of the filter screen 10 being discharged from the discharge trough 212 will also change. At this time, the guide strip 25 will rotate to adapt to the angle of the filter screen 10. The top plate 254 and the first mounting cylinder 251 are connected to the bracket 255, which is used to connect the top plate 254 and the first mounting cylinder 251 to enhance the stability of the connection.

[0026] The guide bar 25 is connected to the connecting rod 22 through the first mounting cylinder 251 and the second mounting cylinder 252 and achieves rotational adaptation. The first mounting cylinder 251 is set in the mounting hole 23 to support rotation. The limiting plate 253 limits the filter screen 10 on both sides. The top plate 254 limits the filter screen 10 up and down and lifts and guides bending. The bracket 255 connects the top plate 254 and the first mounting cylinder 251 to enhance stability. Finally, when the positions of the discharge mechanism 2 and the moving mechanism 4 change, it adapts to the discharge angle of the filter screen 10 and guides it stably.

[0027] A rotating mechanism 3 is mounted on the discharge mechanism 2, with one end connected to the discharge mechanism 2. It is used to change the position of the discharge mechanism 2. A sleeve rod 31 is mounted on the base plate 1. A sleeve 32 is mounted on the sleeve rod 31. The sleeve 32 is hollow and a plug rod 33 is mounted in the sleeve 32. A connecting sleeve 34 is mounted at the end of the plug rod 33. There is at least one sleeve 32, plug rod 33 and connecting sleeve 34, and they are arranged in mirror image opposite each other. All connecting sleeves 34 are respectively mounted on the discharge mechanism 2 and the moving mechanism 4.

[0028] Please see Figure 4A pushing mechanism 5 is mounted on the discharge mechanism 2. The output end of the pushing mechanism 5 is equipped with a moving mechanism 4, which is used to move the moving mechanism 4. The moving mechanism 4 is connected to the other end of the rotating mechanism 3. When the pushing mechanism 5 moves the moving mechanism 4, it simultaneously drives the discharge mechanism 2 to move, changing the output length between the filter screen 10 and the filter mechanism 6, thus lengthening the filter screen 10. When the pushing mechanism 5 pushes the moving mechanism 4, the moving mechanism 4 changes the discharge mechanism 2 through the rotating mechanism 3. A pressure detection module is provided on the contact surface between the moving mechanism 4 and the filter screen 10. The pressure detection module is used to detect the pressure level of the filter screen 10. When the pressure of the filter screen 10 decreases (i.e., falls below a preset value), the pushing mechanism 5, by moving the moving mechanism 4, simultaneously drives the discharge mechanism 2 to move, changing the output length between the filter screen 10 and the filter mechanism 6, thus lengthening the filter screen 10.

[0029] The preset values ​​here can be set according to the actual structure.

[0030] The pushing mechanism 5 includes an air pump 51 mounted on the electrical box 12. The air pump 51 drives the push rod 52 to move. The push rod 52 is built into the air pump 51. A connecting pad 53 is provided on the output end of the push rod 52. The connecting pad 53 is connected to the push plate 41. The pushing mechanism 5 is only used to push the moving mechanism 4.

[0031] The pushing mechanism 5 drives the pushing rod 52 to move through the air pump 51. The connecting pad 53 connects to the pushing plate 41 to push the moving mechanism 4. The moving mechanism 4 is connected to the other end of the rotating mechanism 3. When pushing, it synchronously drives the discharge mechanism 2 to move, changing the output length of the filter screen 10 and the filter mechanism 6, so as to realize the stretching and position adjustment of the filter screen 10.

[0032] Please see Figure 7 The moving mechanism 4 is connected to the pushing mechanism 5. A second slide groove 13 is provided on the base plate 1. A second limiting strip 43 is provided at the bottom of the pushing plate 41. When the second limiting strip 43 and the second slide groove 13 are connected, the pushing plate 41 can move stably. The moving mechanism 4 includes: a pushing plate 41 connected to the pushing mechanism 5. The pushing plate 41 is used to drive the bending rod 46 to move synchronously. A third slide groove 42 is provided on the pushing plate 41. The third slide groove 42 is slidably connected to the limiting connecting plate 62, thereby improving the stability of the moving plate 41. The third slide groove 42 is connected to the filtering mechanism 6. A second limiting strip 43 is provided on one side of the pushing plate 41. The second limiting strip 43 is connected to the second slide groove 13.

[0033] The moving mechanism 4 achieves stable movement by connecting the second limiting strip 43 of the push plate 41 to the second slide groove 13 of the base plate 1. The third slide groove 42 is connected to the limiting connecting plate 62 of the filter mechanism 6 to improve the movement stability. The push plate 41 drives the bending rod 46 to move synchronously and connect to the filter mechanism 6, thus completing the improvement of movement stability and the collaborative work with the filter mechanism 6.

[0034] A movable rod 44 is also inserted into the push plate 41. The movable rod 44 can move within the push plate 41. The connection between the movable rod 44 and the push plate 41 is an insertion connection. One end of the movable rod 44 is connected to the connecting shell 45, and the connecting shell 45 is connected to the movable rod 44. A bending rod 46 is provided in the connecting shell 45, which is used to change the output angle of the filter screen 10. A first anti-compression spring 47 is also provided between the connecting shell 45 and the push plate 41. When the bending rod 46 comes into contact with the filter screen 10 and is subjected to pressure, it bends. The rod 46 drives the connecting shell 45 to retract into the push plate 41 via the movable rod 44. At this time, the first anti-compression spring 47 is compressed, thus the first anti-compression spring 47 is used to push the connecting shell 45 outward. The first anti-compression spring 47 is used to relieve the pressure on the bent rod 46, and the first anti-compression spring 47 is also used to reset the bent rod 46. The base plate 1 is also provided with the movable rod 44, the connecting shell 45, the bent rod 46 and the first anti-compression spring 47, which are used to squeeze the filter screen 10 and increase the tension of the filter screen 10. When the push plate 41 moves forward, the bent rods 46 on both sides move and clamp the filter screen 10 together, strengthening the restriction of the filter screen 10, and the first anti-compression spring 47 can retract backward at the same time, so as to ensure that it always follows the position change of the filter screen 10.

[0035] The push plate 41 is inserted into the movable rod 44 to move. The movable rod 44 is connected to the connecting shell 45 and carries the bending rod 46 to change the output angle of the filter screen 10. A first anti-compression spring 47 is provided between the connecting shell 45 and the push plate 41. When the bending rod 46 is compressed, it drives the connecting shell 45 to retract through the movable rod 44. The first anti-compression spring 47 compresses and buffers the pressure and resets the bending rod 46, thus realizing the functions of angle adjustment, pressure buffering and automatic reset of the filter screen 10.

[0036] Please see Figure 8 and Figure 9The filter mechanism 6 is equipped with a main body 61, which is used to filter viscous fluid with the inserted filter screen 10. The main body 61 has an inlet 65 and an outlet 611. The inlet 65 is used to insert the filter screen 10, and the outlet 611 is used to discharge the filter screen 10 and the waste material adhering to the filter screen 10. A limiting connecting plate 62 is provided on the side of the main body 61 near the inlet 65. The limiting connecting plate 62 is used to limit the push plate 41 and is connected to the third slide 42. A bearing plate 63 is provided next to the inlet 65. A guide roller 64 is connected to the bearing plate 63. The guide roller 64 is used to guide the filter screen 10 into the inlet 65. A scraper 610 is provided on the side of the main body 61 near the outlet 611. The scraper 610 is used to scrape off the viscous fluid adhering to the filter screen 10, thereby ensuring that the viscous fluid will not stick to the waste screen and be recycled together.

[0037] The filtration mechanism 6 inserts the filter screen 10 through the inlet 65 of the main body 61 to achieve viscous fluid filtration, and discharges waste screen and waste material through the outlet 611; the limiting connecting plate 62 is connected to the third slide groove 42 of the moving mechanism 4 to improve the moving stability; the guide roller 64 on the bearing plate 63 guides the filter screen 10 into the inlet 65; the scraper 610 at the outlet 611 scrapes off the viscous fluid adhering to the filter screen 10, and finally completes the functions of viscous fluid filtration, filter screen 10 guidance and waste material separation.

[0038] The main body 61 has a feed inlet 66 for feeding and discharging viscous fluid. A cooling mechanism 67 is provided on one side of the main body 61 to cool the filtered waste screen, making the viscous fluid on the filter screen 10 cool and harden. A heating mechanism 69 is provided on the other side of the cooling mechanism 67 to slightly soften the heating mechanism 69 and increase its toughness, preventing the waste from breaking when pulled by the clamping roller 7. The cooling mechanism 67 is used to cool the filtered filter screen 10, and the heating mechanism 69 is used to heat the filtered filter screen 10. A loading mechanism 68 is provided in the cooling mechanism 67, and a cooling pipe 681 is provided on the loading mechanism 68. The cooling pipe 681 is coiled in the cooling mechanism 67 and contains coolant. The coiled arrangement of the cooling pipe 681 effectively increases the cooling effect over a large area, which is used to cool the viscous fluid adhering to the filter screen 10.

[0039] When the automatic screen changing device is in use, the base plate 1 is connected to the first limiting strip 211 of the discharge mechanism 2 via the first slide 11, allowing the discharge mechanism 2 to move along the direction of the first slide 11; the air pump 51 of the pushing mechanism 5 drives the pushing rod 52, which is connected to the pushing plate 41 of the moving mechanism 4 via the connecting pad 53. The pushing plate 41 moves along the second slide 13 via the second limiting strip 43, and the third slide 42 is connected to the limiting connecting plate 62 of the filter mechanism 6 to improve stability; when moving, the pushing plate 41 is linked to the discharge mechanism 2 via the rotating mechanism 3 to change the filter screen 10 and the filter... When the position of the discharge mechanism 2 moves in the opposite direction to the position trajectory of the push plate 41, the output length of the mechanism 6 extends the output path of the filter screen 10 and pulls the filter screen 10, strengthening the compression restriction to tighten it; when the two positions are close, the output path is shortened and the compression restriction is reduced to relax it; at the same time, the movable rod 44 and the connecting shell 45 on the push plate 41 are connected to the bending rod 46, the first anti-compression spring 47 buffers the bending rod 46 to retract under pressure and reset, adjusting the output angle and tension of the filter screen 10, and finally achieving precise control of the tightness of the filter screen 10 through position adjustment.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic screen changing device for replacing the filter screen (10) in a filter mechanism (6), characterized in that, include: Base plate (1); The discharge mechanism (2) is located on the base plate (1) and is used to provide the filter screen (10) to the filter mechanism (6). A rotating mechanism (3) is provided on the discharge mechanism (2), one end of which is connected to the discharge mechanism (2), and is used to change the position of the discharge mechanism (2); A pushing mechanism (5) is provided on the discharge mechanism (2). The output end of the pushing mechanism (5) is provided with a moving mechanism (4). The moving mechanism (4) is connected to the other end of the rotating mechanism (3). The moving mechanism (4) is in contact with the filter screen (10). A pressure detection module is provided on the contact surface between the moving mechanism (4) and the filter screen (10). The pressure detection module is electrically connected to the pushing mechanism (5). The pressure detection module is used to detect the pressure of the filter screen (10). When the pressure of the filter screen (10) is lower than the preset value, the pushing mechanism (5) pushes the moving mechanism (4) to move, which can simultaneously drive the discharge mechanism (2) to move, change the output length between the filter screen (10) and the filter mechanism (6), and lengthen the filter screen (10).

2. The automatic screen changing device according to claim 1, characterized in that: An electrical box (12) is provided on the base plate (1), and the electrical box (12) is connected to the pushing mechanism (5); The pushing mechanism (5) includes: an air pump (51) installed on the electrical box (12), the air pump (51) having a built-in push rod (52), and a connecting pad (53) on the output end of the push rod (52).

3. An automatic screen changing device according to claim 1 or 2, characterized in that: The moving mechanism (4) and the pushing mechanism (5) are connected, and a second sliding groove (13) is provided on the base plate (1). The moving mechanism (4) includes: a push plate (41) connected to the pushing mechanism (5), a third slide groove (42) is provided on the push plate (41), the third slide groove (42) is connected to the filtering mechanism (6), and a second limiting strip (43) is provided on one side of the push plate (41), the second limiting strip (43) is connected to the second slide groove (13); A movable rod (44) is also inserted into the push plate (41). One end of the movable rod (44) is connected to the connecting shell (45). A bent rod (46) is provided in the connecting shell (45) for changing the output angle of the filter screen (10). A first anti-compression spring (47) is also provided between the connecting shell (45) and the push plate (41), and the first anti-compression spring (47) is used to reset the bent rod (46); The base plate (1) is provided with the movable rod (44), the connecting shell (45), the bending rod (46) and the first anti-compression spring (47), and is arranged opposite to the third slide groove (42) to squeeze the filter screen (10) and increase the tension of the filter screen (10).

4. An automatic screen changing device according to claim 3, characterized in that: The base plate (1) is provided with a first slide groove (11), and the first slide groove (11) is connected to the discharge mechanism (2); The discharge mechanism (2) includes: a housing (21), a first limiting strip (211) is provided on one side of the housing (21), and the first limiting strip (211) and the first slide groove (11) are inserted into each other; The outer shell (21) is provided with a discharge groove (212), and connecting rods (22) are provided on both sides of the discharge groove (212). The outer side of the connecting rods (22) is provided with mounting holes (23). Both the connecting rod (22) and the mounting hole (23) are used to connect the guide strip (25) for guiding the direction of the filter screen (10); The outer casing (21) is provided with a storage roller (24) for storing unused filters (10). The outer casing (21) has a connecting plate (26) for connecting the rotating mechanism (3) on the side near the rotating mechanism (3).

5. An automatic screen changing device according to claim 4, characterized in that: The guide strip (25) includes a first mounting cylinder (251) and a second mounting cylinder (252). The first mounting cylinder (251) is connected to the connecting rod (22). The first mounting cylinder (251) is disposed in the mounting hole (23) and is used to allow the guide strip (25) to rotate on the connecting rod (22). The second mounting cylinder (252) is also provided with a limiting plate (253) and a top plate (254) on one side, which are used to guide the filter screen (10) to bend after it is discharged from the discharge trough (212); The top plate (254) and the first mounting cylinder (251) are connected to the bracket (255).

6. An automatic screen changing device according to claim 4, characterized in that: The base plate (1) is provided with a sleeve rod (31), and a sleeve (32) is sleeved on the sleeve rod (31). The sleeve (32) is hollow, and a plug rod (33) is sleeved in the sleeve (32). The end of the plug rod (33) is provided with a connecting sleeve (34). The sleeve (32), the plug rod (33), and the connecting sleeve (34) are at least one and are arranged in mirror image opposite each other; All of the connecting sleeves (34) are respectively provided on the discharge mechanism (2) and the moving mechanism (4).

7. An automatic screen changing device according to claim 3, characterized in that: The filter mechanism (6) is provided with a main body (61), and the main body (61) is provided with an inlet (65) and an outlet (611). A limiting connecting plate (62) is provided on the main body (61) near the inlet (65), and the limiting connecting plate (62) is used to connect with the third slide groove (42); A support plate (63) is provided next to the inlet (65), and a guide roller (64) is connected to the support plate (63) for guiding the filter screen (10) into the inlet (65); A scraper (610) is provided on the main body (61) near the outlet (611), and the scraper (610) is used to scrape off the viscous fluid adhering to the filter screen (10).

8. An automatic screen changing device according to claim 7, characterized in that: The main body (61) is provided with a feed inlet (66), a cooling mechanism (67) is provided on one side of the main body (61), and a heating mechanism (69) is provided on the other side of the cooling mechanism (67). The cooling mechanism (67) is used to cool the filtered screen (10), and the heating mechanism (69) is used to heat the filtered screen (10).

9. An automatic screen changing device according to claim 6, characterized in that: The bottom plate (1) is provided with a clamping roller (7) and a net-collecting roller (8) on one side. The take-up roller (8) is equipped with a motor (9) for driving the take-up roller (8) to rotate. The motor (9) and the take-up roller (8) are also equipped with gears (91). The motor (9) is located on the other side of the base plate (1). The connecting end of the clamping roller (7) is provided with a transmission roller (94), the transmission roller (94) is inserted into the base plate (1), the transmission roller (94) is provided with a gear (91), and is also provided with a pulley (92). The gear (91) provided on the clamping roller (7) and the gear (91) provided on the net-collecting roller (8) mesh with each other. Furthermore, there are at least two clamping rollers (7), which are arranged in a mirror image opposite each other, and the two gears (91) that are mirror images of each other mesh with each other; A transmission belt (93) is fitted onto the non-mirror adjacent pulleys (92), which synchronously drive all the clamping rollers (7) to rotate.

10. An automatic screen changing device according to claim 8, characterized in that: The cooling mechanism (67) is provided with a loading mechanism (68), and the loading mechanism (68) is provided with a cooling pipe (681). The cooling pipe (681) is coiled in the cooling mechanism (67) and is used to cool the viscous fluid that adheres to the filter screen (10).

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