Glass fiber impregnating compound backflow filtering device

Abstract

The invention belongs to the technical field of glass fiber production, and particularly relates to a glass fiber impregnating compound backflow filtering device which comprises a filtering box, a supporting plate is slidably connected into the filtering box in the vertical direction, and a filtering piece is fixedly connected to the center position of the supporting plate; and the flow adjusting mechanism is arranged in the filter box and is used for adaptively adjusting the flow of the impregnating compound entering the filter box in unit time. By arranging the flow adjusting mechanism, in the backflow filtering process, the amount of an impregnating compound in the filtering box is detected through the buoyancy frame, and when the amount of the impregnating compound in the filtering box is large, the gap between the two guide plates is reduced, so that the flow of the impregnating compound flowing to the space above the filtering piece in unit time is reduced, and the filtering efficiency is improved. And when the impregnating compound in the filter box is less, the gap between the two guide plates is increased, so that the flow of the impregnating compound flowing to the space above the filter piece in unit time is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of glass fiber production, and in particular relates to a glass fiber sizing agent reflux filtering device. Background Art

[0002] Glass fiber sizing is a resin or solution used for glass fiber reinforcement materials. It is mainly used to enhance the bonding properties of glass fibers so that they can better penetrate and bond when making composite materials. This sizing is usually a resin or resin mixture (such as epoxy resin, polyester resin, vinyl ester resin, etc.) used to combine glass fibers with matrix materials to form high-strength composite materials. During the production, storage and use of the sizing, some impurities or solid particles (such as undissolved resin particles, dust or other impurities) will be introduced. These impurities will affect the uniformity of the resin and the bonding effect with the glass fiber. Therefore, it is necessary to use a reflux filtration device to remove impurities in the sizing to ensure the purity of the sizing, avoid their negative impact during the sizing process, and ensure the quality and performance of the composite material.

[0003] The prior art, such as a glass fiber sizing agent reflux filtration device and a circulation coating system disclosed in China Publication No. CN114917635B, has the following technical problems during use: During the reflux filtration process, it is impossible to adjust the flow rate of the wetting agent flowing into the filter device per unit time according to the volume of the wetting agent in the filter device. When the volume of the wetting agent in the filter device is large, if the flow rate of the wetting agent flowing into the filter device per unit time is large, the volume of the wetting agent in the filter device will further increase, resulting in excessive hydraulic pressure, causing the filter element to accumulate a large amount of impurities or particles in a short period of time, and then causing the filter element to be blocked or overloaded, affecting the filtration effect. When the volume of the wetting agent in the filter device is small, if the flow rate of the wetting agent flowing into the filter device per unit time is small, the filtration efficiency of the filter element for the wetting agent will be reduced, and it may even cause too little wetting agent in the circulation box, resulting in the inability to timely deliver the wetting agent to the coating device, affecting the production efficiency of the glass fiber. Summary of the invention

[0004] The purpose of the present invention is to address the problems raised in the above-mentioned background technology and to provide a glass fiber impregnant reflux filtration device which can detect the amount of impregnant in the filter box through a buoyancy frame during the reflux filtration process and further adjust the flow rate of impregnant flowing into the filter box per unit time.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A glass fiber sizing agent reflux filtration device, comprising: A filter box, wherein a support plate is slidably connected in the vertical direction inside the filter box, and a filter element is embedded in the center of the support plate; The flow regulating mechanism is arranged inside the filter box and is used for adaptively regulating the flow rate of the wetting agent entering the filter box per unit time. The flow regulating mechanism includes a buoyancy frame slidably connected to the inner wall of the filter box in a vertical direction, the density of the buoyancy frame is less than the density of the wetting agent, and two push rods are fixedly connected to the upper end of the buoyancy frame. Two liquid storage cylinders are fixedly connected to the inner top wall of the filter box, and the upper ends of the push rods pass through the liquid storage cylinders at corresponding positions, extend into the interior and are fixed with piston blocks, and two arc control frames are symmetrically fixedly connected to the inner wall of the filter box, and arc plates are symmetrically and airtightly slidably connected inside the two arc control frames, and guide plates are symmetrically and fixedly connected to the outer arc surfaces of the two arc plates, and hydraulic transmission is between the liquid storage cylinder and the arc control frame, and a sealing plate is fixedly connected to the upper end of the arc control frame, and the sealing plate, arc control frame, arc plate and guide plate are all airtightly connected to the inner wall of the filter box.

[0006] Preferably, the arc-shaped control frame is fixedly connected to the corresponding position of the liquid storage cylinder with an infusion tube, and a first liquid storage space is formed between the space below the piston block in the liquid storage cylinder, the arc-shaped control frame and the inside of the infusion tube, and the first liquid storage space is filled with hydraulic oil.

[0007] Preferably, two sets of vibration mechanisms are provided in the filter box below the support plate to prevent the filter element from being blocked. The vibration mechanism includes a rotating rod rotatably connected to the inner wall of the filter box, a motor for driving the rotating rod is fixedly connected to the outer wall of the filter box, and a protrusion that periodically pushes the support plate to move upward is fixedly connected to the rotating rod.

[0008] Preferably, two amplitude adjustment mechanisms are further provided below the support plate, for adjusting the vibration amplitude of the filter element according to the volume of the wetting agent above the support plate, the amplitude adjustment mechanism comprising a fixed plate fixedly connected to the inner wall of the filter box, a vibration box being slidably connected to the side wall of the fixed plate in a vertical direction, a stopper which is abutted against the lower end of the vibration box being fixedly connected to the side wall of the fixed plate, an extension rod being fixedly connected to the lower end of the support plate, the lower end of the extension rod passing through the vibration box and fixed with a piston plate which is air-tightly connected to the vibration box, a hose being fixedly connected to the outer wall of the liquid storage cylinder, the hose passing through the buoyancy frame and the support plate and extending into the vibration box, a second liquid storage space is formed between the space above the piston block in the liquid storage cylinder, the space in the hose and the space above the piston plate in the vibration box, and the second liquid storage space is also filled with hydraulic oil.

[0009] Preferably, a centrifugal separation mechanism is also provided in the filter box below the support plate to improve the filtering effect on the wetting agent. The centrifugal separation mechanism includes a fixed ring fixedly connected to the inner wall of the filter box, the inner wall of the fixed ring is rotatably connected to a rotating ring plate, the lower end of the rotating ring plate is fixedly connected to a separation cylinder, and a plurality of separation holes distributed in a circular array are provided on the circumferential side wall of the separation cylinder.

[0010] Preferably, a transmission mechanism is provided at positions on both sides of the separation cylinder in the filter box, which is used to drive the centrifugal separation mechanism to work synchronously when the vibration mechanism is working. The transmission mechanism includes a first transmission rod rotatably connected to the bottom wall of the filter box, a transmission gear is fixedly connected to the first transmission rod, and an annular tooth groove meshing with the transmission gear is provided on the circumferential side wall of the rotating ring plate. A second transmission rod is rotatably connected to the inside of the filter box through a mounting plate, and the ends of the first transmission rod and the second transmission rod close to each other are fixedly connected to a first bevel gear meshing with each other, and the ends of the second transmission rod and the rotating rod close to each other are fixedly connected to a second bevel gear meshing with each other.

[0011] Preferably, a detachable bottom plate is installed on the inner bottom wall of the separation cylinder.

[0012] Preferably, two opening and closing plates are movably mounted on the outer wall of the filter box.

[0013] Compared with the existing technology, the advantages of the glass fiber sizing agent reflux filtration device are: The present invention provides a flow regulating mechanism. During the reflux filtration process, the volume of the wetting agent in the filter box is detected by the buoyancy frame. When the volume of the wetting agent in the filter box is large, the liquid level of the wetting agent is high, which pushes the buoyancy frame to a higher position, so that the arc plate can be retracted into the arc control frame, and the gap between the two guide plates is reduced, thereby reducing the flow of the wetting agent flowing to the space above the filter element per unit time, avoiding load on the filter element and ensuring the filtration effect. When the volume of the wetting agent in the filter box is small, the arc plate can be extended from the arc control frame, and the gap between the two guide plates is increased, thereby increasing the flow of the wetting agent flowing to the space above the filter element per unit time, thereby improving the filtration efficiency of the wetting agent, ensuring that there is sufficient wetting agent in the circulation box, and avoiding affecting the production efficiency of the glass fiber.

[0014] The present invention provides a vibration mechanism. During the reflux filtration process, the motor drives the rotating rod to rotate, so that the protrusions on the rotating rod periodically push the support plate to move upward, so that the filter element can vibrate during the filtering process of the wetting agent, further avoiding clogging of the filter element and ensuring the filtering effect of the wetting agent.

[0015] The present invention is capable of synchronously adjusting the vibration amplitudes of the support plate and the filter element according to the volume of the wetting agent on the support plate by providing an amplitude adjustment mechanism. When the wetting agent on the support plate is relatively large, the support plate is initially in a lower position, so that the vibration amplitudes of the support plate and the filter element are relatively large, thereby preventing the vibration amplitude of the wetting agent from being too small, resulting in the inability to effectively remove sediment or impurities on the surface of the filter element. When the wetting agent on the support plate is relatively small, the support plate is initially in a higher position, so that the vibration amplitudes of the support plate and the filter element are relatively small, thereby preventing the vibration amplitude of the wetting agent from being too large, resulting in unstable flow of the wetting agent and the generation of bubbles.

[0016] The present invention provides a centrifugal separation mechanism so that, during the reflux filtration process, the wetting agent filtered out by the filter element flows into the separation cylinder, and then the separation cylinder is driven to rotate by a rotating ring plate, so that the wetting agent in the separation cylinder can be thrown out, and smaller particles therein can be filtered inside the separation cylinder, thereby improving the purity of the wetting agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a schematic cross-sectional structure diagram of the filter box in the present invention; Figure 3 yes Figure 2 The enlarged view of point A in the middle; Figure 4 It is a partial structural schematic diagram of the flow regulating mechanism in the present invention; Figure 5 It is a partial structural schematic diagram of the amplitude adjustment mechanism in the present invention.

[0018] In the figure: 1. filter box; 11. support plate; 12. filter element; 13. return pipe; 14. drain pipe; 15. circulation box; 2. flow regulating mechanism; 21. buoyancy frame; 22. push rod; 23. liquid storage cylinder; 24. piston block; 25. arc control frame; 26. arc plate; 27. guide plate; 28. infusion tube; 3. vibration mechanism; 31. rotating rod; 32. motor; 33. bump; 4. amplitude regulating mechanism; 41. fixed plate; 42. vibration box; 43. stopper; 44. extension rod; 45. piston plate; 46. hose; 5. centrifugal separation mechanism; 51. fixed ring; 52. rotating ring plate; 53. separation cylinder; 54. separation hole; 6. transmission mechanism; 61. first transmission rod; 62. transmission gear; 63. annular tooth groove; 64. second transmission rod; 65. first bevel gear; 66. second bevel gear. DETAILED DESCRIPTION

[0019] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0020] Example: Refer to Figures 1 to 5 , a glass fiber sizing agent reflux filtration device, comprising: A filter box 1, in which a support plate 11 is slidably connected in a vertical direction, and a filter element 12 is fixedly connected at the center of the support plate 11; Specifically, the upper end of the filter box 1 is fixedly connected to a return pipe 13, and the upper end of the return pipe 13 is connected to the coating device (not shown in the figure). The lower end of the filter box 1 is fixedly connected to a drain pipe 14, and the lower end of the drain pipe 14 is fixedly connected to a circulation box 15. A circulation pump is provided between the circulation box 15 and the coating device. In actual use, the impregnating agent in the coating device can be returned to the filter box 1 through the return pipe 13. After being filtered by the filter box 1, the impregnating agent is discharged to the circulation box 15 through the drain pipe 14, and the impregnating agent in the circulation box 15 is pumped back to the coating device through the circulation pump, thereby realizing the reflux filtration of the glass fiber impregnating agent. This is an existing mature technology and will not be repeated here.

[0021] A flow regulating mechanism 2 is arranged inside the filter box 1 and is used for adaptively regulating the flow rate of the wetting agent entering the filter box 1 per unit time. The flow regulating mechanism 2 comprises a buoyancy frame 21 slidably connected to the inner wall of the filter box 1 in the vertical direction. Two push rods 22 are fixedly connected to the upper end of the buoyancy frame 21. Two liquid storage cylinders 23 are fixedly connected to the inner top wall of the filter box 1. The push rods 22 extend to the part of the liquid storage cylinder 23 at the corresponding position and are fixedly connected to a piston block 24. Two arc-shaped control frames 25 are fixedly connected to the inner wall of the filter box 1. An arc plate 26 is airtightly slidably connected inside the arc-shaped control frame 25. A guide plate 27 is fixedly connected to the arc-shaped plate 26, and the two guide plates 27 are arranged in a mirror-symmetrical manner. A liquid infusion tube 28 is fixedly connected between the arc-shaped control frame 25 and the liquid storage cylinder 23 at the corresponding position. A first liquid storage space is formed between the space below the piston block 24 in the liquid storage cylinder 23, the arc-shaped control frame 25 and the inside of the liquid infusion tube 28, and the first liquid storage space is filled with hydraulic oil.

[0022] Specifically, hydraulic transmission is implemented between the liquid storage cylinder 23 and the arc-shaped control frame 25, a sealing plate is fixedly connected to the upper end of the arc-shaped control frame 25, and the sealing plate, the arc-shaped control frame 25, the arc-shaped plate 26 and the guide plate 27 are all airtightly connected to the inner wall of the filter box 1, so that the wetting agent can only flow out through the gap between the two guide plates 27 when refluxing.

[0023] In view of the fact that the prior art cannot adjust the flow rate of the impregnant in the filter device to the space above the filter element 12 per unit time according to the volume of the impregnant in the filter device, when the volume of the impregnant in the filter device is large, the filter element 12 accumulates a large amount of impurities or particles in a short period of time, causing the filter element 12 to be blocked or overloaded, affecting the filtering effect; when the volume of the impregnant in the filter device is small, the filtering efficiency of the filter element 12 for the impregnant is reduced, further resulting in too little impregnant in the circulation box 15 and the inability to timely transport the impregnant to the coating device, the present invention sets a flow regulating mechanism 2, and during the reflux filtration process, the buoyancy frame 21 is used to detect the liquid level of the impregnant in the filter box 1, further detects the volume of the impregnant, and further adjusts the flow rate of the impregnant flowing to the space above the filter element 12 per unit time: When the volume of the impregnating agent in the filter box 1 is large, the liquid level of the impregnating agent is high, wherein the density of the impregnating agent is greater than the density of the buoyancy frame 21, and the density of the impregnating agent is usually between 0.9 g / cm³ and 1.2 g / cm³, while the buoyancy frame 21 adopts a PVC foam board, and its density is usually between 0.4 - 0.8 g / cm³, so it can push the buoyancy frame 21 to a higher position. At this time, the buoyancy frame 21 drives the piston block 24 to rise to a higher position in the liquid storage cylinder 23 through the push rod 22, so that the hydraulic oil in the arc control frame 25 flows through the infusion pipe 28 to the space below the piston block 24 in the liquid storage cylinder 23, so that the arc plate 26 can be contracted to the inside of the arc control frame 25, and then the two guide plates 27 can be swung close to each other, so that the gap between the two guide plates 27 is reduced, so that the flow rate of the impregnating agent flowing to the filter element 12 per unit time is reduced, thereby avoiding causing load to the filter element 12 and ensuring the filtering effect; When the volume of the wetting agent in the filter box 1 is small, the liquid level of the wetting agent is low, and the buoyancy frame 21 and the piston block 24 are in a lower position, so that the hydraulic oil in the space below the piston block 24 in the liquid storage cylinder 23 can flow into the arc control frame 25, and the arc plate 26 can extend from the arc control frame 25, so that the two guide plates 27 swing away from each other, and the gap between the two guide plates 27 increases, so that the flow rate of the wetting agent flowing to the filter element 12 per unit time increases, thereby improving the filtration efficiency of the wetting agent, ensuring that there is sufficient wetting agent in the circulation box, and avoiding affecting the production efficiency of the glass fiber.

[0024] Two sets of vibration mechanisms 3 are provided in the filter box 1 below the support plate 11 to prevent the filter element 12 from being blocked. The vibration mechanism 3 includes a rotating rod 31 rotatably connected to the inner wall of the filter box 1, and a motor 32 for driving the rotating rod 31 is fixedly connected to the outer wall of the filter box 1. A protrusion 33 is fixedly connected to the rotating rod 31 to periodically push the support plate 11 to move upward.

[0025] In view of the problem in the prior art that the filter device is easily clogged due to factors such as impurity accumulation and large particles, thereby affecting the filtering effect and the operating efficiency of the device, the present invention provides a vibration mechanism 3. During the reflux filtration process, the motor 32 drives the rotating rod 31 to rotate, so that the protrusion 33 on the rotating rod 31 periodically pushes the support plate 11 to move upward, and the support plate 11 automatically moves downward and resets under the action of gravity, so that the filter element 12 can vibrate during the filtering process of the wetting agent, avoiding clogging of the filter element 12 and ensuring the filtering effect of the wetting agent.

[0026] Specifically, the protrusions 33 , the mounting plate, and the transmission gear 62 are all staggered, so that the protrusions 33 only vibrate the support plate 11 during the rotation process, and will not cause motion interference to the subsequent transmission mechanism 6 .

[0027] Two amplitude adjustment mechanisms 4 are also provided below the support plate 11, which are used to adjust the vibration amplitude according to the volume of the wetting agent. The amplitude adjustment mechanism 4 includes a fixed plate 41 fixedly connected to the inner wall of the filter box 1, and a vibration box 42 is slidably connected to the side wall of the fixed plate 41 in the vertical direction. A stopper 43 that is abutted against the lower end of the vibration box 42 is fixedly connected to the side wall of the fixed plate 41. An extension rod 44 is fixedly connected to the lower end of the support plate 11, and the lower end of the extension rod 44 passes through the vibration box 42 and is fixed with a piston plate 45 that is air-tightly connected to the vibration box 42. A hose 46 is fixedly connected to the outer wall of the liquid storage cylinder 23, and the hose 46 passes through the buoyancy frame 21 and the support plate 11 and extends into the vibration box 42. A second liquid storage space is formed between the space above the piston block 24 in the liquid storage cylinder 23, the space in the hose 46, and the space above the piston plate 45 in the vibration box 42, and the second liquid storage space is also filled with hydraulic oil.

[0028] When the above-mentioned vibration mechanism 3 vibrates the support plate 11 and the filter element 12, the vibration amplitude cannot be adjusted according to the volume of the wetting agent, resulting in the following effects: for a wetting agent with a smaller volume, the vibration amplitude of the wetting agent is larger at the same vibration amplitude, which will cause the flow of the wetting agent to be unstable and cause bubbles to be generated, affecting the reflux and filtration efficiency of the wetting agent; for a wetting agent with a larger volume, the vibration amplitude of the wetting agent is smaller at the same vibration amplitude, and it is impossible to effectively remove the sediment or impurities on the surface of the filter element 12, resulting in clogging of the filter element 12 and reduced filtration efficiency.

[0029] Therefore, the present invention can synchronously adjust the vibration amplitude of the support plate 11 and the filter element 12 according to the amount of the wetting agent on the support plate 11 by setting the amplitude adjustment mechanism 4. When the volume of the wetting agent on the support plate 11 is large, the piston block 24 is at a higher position in the liquid storage cylinder 23, so that the hydraulic oil in the space above the piston block 24 in the liquid storage cylinder 23 is transported to the vibration box 42 through the hose 46, so that the piston plate 45 in the vibration box 42 is at a lower position, and then the support plate 11 is at a lower position in the initial state, so that when the protrusion 33 contacts and pushes the support plate 11 to move upward, its displacement amplitude is large, so that the vibration amplitude of the support plate 11 and the filter element 12 is large. The degree is large to avoid the vibration amplitude of the wetting agent being too small, resulting in the inability to effectively remove the sediment or impurities on the surface of the filter element 12, and preventing the filter element 12 from being blocked. When the volume of the wetting agent on the support plate 11 is small, the piston block 24 is at a lower position in the liquid storage cylinder 23, and the piston plate 45 in the vibration box 42 is at a higher position. The support plate 11 is at a higher position in the initial state, so that when the protrusion 33 contacts and pushes the support plate 11 to move upward, its displacement amplitude is small, so that the vibration amplitude of the support plate 11 and the filter element 12 is small, avoiding the vibration amplitude of the wetting agent being too large, resulting in unstable flow of the wetting agent and causing bubbles to be generated, thereby ensuring the reflux of the wetting agent and the filtration efficiency.

[0030] A centrifugal separation mechanism 5 is also provided at a position below the support plate 11 in the filter box 1, which is used to improve the filtering effect on the wetting agent. The centrifugal separation mechanism 5 includes a fixed ring 51 fixedly connected to the inner wall of the filter box 1, and the inner wall of the fixed ring 51 is rotatably connected to a rotating ring plate 52. The lower end of the rotating ring plate 52 is fixedly connected to a separation cylinder 53, and the circumferential side wall of the separation cylinder 53 is provided with multiple groups of separation holes 54 distributed in a circumferential array.

[0031] Specifically, the diameter of the rotating ring plate 52 is much larger than the diameter of the filter element 12, and a certain distance is left between the rotating ring plate 52 and the filter element 12. During the up and down movement of the filter element 12, the distance left between the rotating ring plate 52 and the filter element 12 can ensure that the wetting agent filtered out by the filter element 12 can completely enter the rotating ring plate 52, thereby avoiding the vibration process from causing a bump on the rotating ring plate 52 and ensuring that the wetting agent filtered by the filter element 12 can completely enter the rotating ring plate 52.

[0032] It is worth mentioning that the present invention sets a centrifugal separation mechanism 5, so that during the reflux filtration process, the wetting agent filtered out by the filter element 12 flows into the separation cylinder 53, and then the separation cylinder 53 is driven to rotate by the rotating ring plate 52, so that the wetting agent in the separation cylinder 53 can be thrown out, and the smaller particles therein can be filtered inside the separation cylinder 53, thereby improving the purity of the wetting agent.

[0033] Transmission mechanisms 6 are provided at positions on both sides of the separation cylinder 53 in the filter box 1, which are used to drive the centrifugal separation mechanism 5 to work synchronously while the vibration mechanism 3 is working. The transmission mechanism 6 includes a first transmission rod 61 rotatably connected to the inner bottom wall of the filter box 1, and a transmission gear 62 is fixedly connected to the first transmission rod 61. An annular tooth groove 63 meshing with the transmission gear 62 is provided on the peripheral side wall of the rotating ring plate 52. A second transmission rod 64 is rotatably connected to the inside of the filter box 1 through a mounting plate, and a first bevel gear 65 meshing with each other is fixedly connected to one end of the first transmission rod 61 and the second transmission rod 64 close to each other, and a second bevel gear 66 meshing with each other is fixedly connected to one end of the second transmission rod 64 and the rotating rod 31 close to each other.

[0034] In addition, the present invention sets a transmission mechanism 6. While the motor 32 drives the rotating rod 31 to rotate, it can drive the second transmission rod 64 to rotate through two second bevel gears 66, and further drive the first transmission rod 61 to rotate through two first bevel gears 65. The first transmission rod 61 drives the separation cylinder 53 to rotate through the transmission gear 62 and the annular tooth groove 63, so that the centrifugal separation mechanism 5 can work synchronously with the vibration mechanism 3 without setting an additional driving source, thereby improving the overall linkage of the device and saving the filtration cost.

[0035] Specifically, a removable bottom plate is installed on the inner bottom wall of the separation cylinder 53, and sliding grooves are opened on the two side walls of the removable bottom plate. A wedge-shaped card plate is slidably connected in the sliding groove, and a reset spring is provided between the wedge-shaped card plate and the inner wall of the sliding groove. A pull rope extending to the bottom of the removable bottom plate is fixedly connected to the wedge-shaped card plate. When the separation cylinder 53 needs to be cleaned, it is only necessary to pull the pull rope so that the wedge-shaped card plate is no longer clamped on the upper end of the inner wall of the separation cylinder 53, so that the removable bottom plate can be pulled out of the separation cylinder 53. After cleaning, it is only necessary to push the removable bottom plate into the separation cylinder 53, so that the wedge-shaped card plate can automatically pop out under the elastic force of the reset spring, thereby closing the separation cylinder 53.

[0036] Specifically, two opening and closing plates are movably installed on the outer wall of the filter box 1 , so that the staff can open the opening and closing plates regularly and clean the top of the support plate 11 and the inside of the separation cylinder 53 .

[0037] The present invention can be explained by the following operation mode: The impregnating agent in the coating device is refluxed into the filter box 1 through the reflux pipe 13. After being filtered by the filter box 1, the impregnating agent is discharged into the circulation box 15 through the drain pipe 14. The impregnating agent in the circulation box 15 is pumped back into the coating device through the circulation pump, thereby realizing the reflux filtration of the glass fiber impregnating agent. The volume of the infiltrant in the filter box 1 is detected by the buoyancy frame 21. When the volume of the infiltrant in the filter box 1 is large, the liquid level of the infiltrant is high, pushing the buoyancy frame 21 to a higher position, and the arc plate 26 is retracted to the inside of the arc control frame 25, so that the two guide plates 27 are swung close to each other, so that the gap between the two guide plates 27 is reduced, so that the flow rate of the infiltrant flowing to the filter element 12 per unit time is reduced. When the volume of the infiltrant in the filter box 1 is small, the liquid level of the infiltrant is low, and the buoyancy frame 21 is at a lower position. The arc plate 26 extends from the arc control frame 25, so that the two guide plates 27 are swung away from each other, and the gap between the two guide plates 27 is increased, so that the flow rate of the infiltrant flowing to the filter element 12 per unit time is increased; The motor 32 drives the rotating rod 31 to rotate, so that the protrusion 33 on the rotating rod 31 periodically pushes the support plate 11 to move upward, and the support plate 11 automatically moves downward and resets under the action of gravity, so that the filter element 12 can vibrate; When the volume of the impregnant on the support plate 11 is large, the hydraulic oil in the space above the piston block 24 in the liquid storage cylinder 23 is transported to the vibration box 42 through the hose 46. The support plate 11 is initially at a lower position, so that the displacement amplitude of the support plate 11 is large, so that the vibration amplitude of the support plate 11 and the filter element 12 is large, and the vibration amplitude of the impregnant is prevented from being too small. When the volume of the impregnant on the support plate 11 is small, the support plate 11 is initially at a higher position, so that the displacement amplitude of the support plate 11 is small, so that the vibration amplitude of the support plate 11 and the filter element 12 is small, and the vibration amplitude of the impregnant is prevented from being too large. While the rotating rod 31 rotates, the second transmission rod 64 is driven to rotate through the two second bevel gears 66, and the first transmission rod 61 is driven to rotate through the two first bevel gears 65. The first transmission rod 61 drives the separation cylinder 53 to rotate through the transmission gear 62 and the annular tooth groove 63, so that the wetting agent in the separation cylinder 53 can be thrown out, and the smaller particles therein can be filtered inside the separation cylinder 53.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A glass fiber sizing agent reflux filtration device, characterized in that: include: A filter box (1), wherein a support plate (11) is slidably connected in a vertical direction inside the filter box (1), and a filter element (12) is embedded in the center of the support plate (11); A flow regulating mechanism (2) is arranged inside the filter box (1) and is used to adaptively regulate the flow of the infiltrating agent entering the filter box (1) per unit time. The flow regulating mechanism (2) comprises a buoyancy frame (21) slidably connected to the inner wall of the filter box (1) in a vertical direction. The density of the buoyancy frame (21) is less than the density of the infiltrating agent. Two push rods (22) are fixedly connected to the upper end of the buoyancy frame (21). Two liquid storage cylinders (23) are fixedly connected to the inner top wall of the filter box (1). The upper ends of the push rods (22) penetrate the liquid storage cylinders (23) at corresponding positions, extend into the interior of the liquid storage cylinders and are fixed thereto. A piston block (24) is fixedly provided, the inner wall of the filter box (1) is symmetrically and fixedly connected with two arc-shaped control frames (25), the inner sides of the two arc-shaped control frames (25) are symmetrically and airtightly slidably connected with arc-shaped plates (26), the outer arc surfaces of the two arc-shaped plates (26) are symmetrically and fixedly connected with guide plates (27), hydraulic transmission is implemented between the liquid storage cylinder (23) and the arc-shaped control frames (25), the upper end of the arc-shaped control frames (25) is fixedly connected with a sealing plate, and the sealing plate, the arc-shaped control frames (25), the arc-shaped plates (26) and the guide plates (27) are all airtightly connected to the inner wall of the filter box (1).

2. The glass fiber sizing agent reflux filtration device according to claim 1, characterized in that: The arc-shaped control frame (25) is fixedly connected to a corresponding position of the liquid storage cylinder (23) via a liquid infusion tube (28); a first liquid storage space is formed between the space below the piston block (24) in the liquid storage cylinder (23), the arc-shaped control frame (25) and the interior of the liquid infusion tube (28); and the first liquid storage space is filled with hydraulic oil.

3. The glass fiber sizing agent reflux filtration device according to claim 1, characterized in that: The upper end of the filter box (1) is fixedly connected to a return pipe (13), the upper end of the return pipe (13) is connected to a coating device, the lower end of the filter box (1) is fixedly connected to a drain pipe (14), the lower end of the drain pipe (14) is fixedly connected to a circulation box (15), and a circulation pump is provided between the circulation box (15) and the coating device.

4. The glass fiber sizing agent reflux filtration device according to claim 1, characterized in that: Two sets of vibration mechanisms (3) are provided in the filter box (1) below the support plate (11) to prevent the filter element (12) from being blocked, the vibration mechanism (3) comprising a rotating rod (31) rotatably connected to the inner wall of the filter box (1), a motor (32) for driving the rotating rod (31) is fixedly connected to the outer wall of the filter box (1), and a protrusion (33) for periodically pushing the support plate (11) to move upward is fixedly connected to the rotating rod (31).

5. The glass fiber sizing agent reflux filtration device according to claim 4, characterized in that: Two amplitude adjustment mechanisms (4) are also provided below the support plate (11) for adjusting the vibration amplitude of the filter element (12) according to the volume of the wetting agent above the support plate (11), the amplitude adjustment mechanism (4) comprising a fixed plate (41) fixedly connected to the inner wall of the filter box (1), a vibration box (42) being slidably connected to the side wall of the fixed plate (41) in a vertical direction, a stopper (43) being fixedly connected to the side wall of the fixed plate (41) and being abutted against the lower end of the vibration box (42), and an extension rod (43) being fixedly connected to the lower end of the support plate (11). 4), the lower end of the extension rod (44) passes through the vibration box (42) and is fixed with a piston plate (45) which is airtightly connected to the vibration box (42); a hose (46) is fixedly connected to the outer wall of the liquid storage cylinder (23); the hose (46) passes through the buoyancy frame (21) and the support plate (11) and extends into the vibration box (42); a second liquid storage space is formed between the space above the piston block (24) in the liquid storage cylinder (23), the space in the hose (46) and the space above the piston plate (45) in the vibration box (42); the second liquid storage space is also filled with hydraulic oil.

6. The glass fiber sizing agent reflux filtration device according to claim 4, characterized in that: A centrifugal separation mechanism (5) is further provided in the filter box (1) at a position below the support plate (11) for improving the filtering effect on the wetting agent, the centrifugal separation mechanism (5) comprising a fixed ring (51) fixedly connected to the inner wall of the filter box (1), a rotating ring plate (52) being rotatably connected to the inner wall of the fixed ring (51), a separation cylinder (53) being fixedly connected to the lower end of the rotating ring plate (52), and a plurality of groups of separation holes (54) distributed in a circumferential array being provided on the circumferential side wall of the separation cylinder (53).

7. The glass fiber sizing agent reflux filtration device according to claim 6, characterized in that: A transmission mechanism (6) is provided at positions on both sides of the separation cylinder (53) in the filter box (1), and is used to drive the centrifugal separation mechanism (5) to work synchronously while the vibration mechanism (3) is working. The transmission mechanism (6) comprises a first transmission rod (61) rotatably connected to the inner bottom wall of the filter box (1), a transmission gear (62) being fixedly connected to the first transmission rod (61), a circular tooth groove (63) meshing with the transmission gear (62) being provided on the peripheral side wall of the rotating ring plate (52), a second transmission rod (64) being rotatably connected inside the filter box (1) via a mounting plate, the first transmission rod (61) and the second transmission rod (64) being fixedly connected at their ends close to each other with first bevel gears (65) meshing with each other, and the second transmission rod (64) and the rotating rod (31) being fixedly connected at their ends close to each other with second bevel gears (66) meshing with each other.

8. The glass fiber sizing agent reflux filtration device according to claim 6, characterized in that: A detachable bottom plate is mounted on the inner bottom wall of the separation cylinder (53).

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