Filtering and recycling system for cleaning waste liquid of glass substrate and working method

Abstract

The application belongs to the technical field of separation, and relates to a filtering circulation system for glass substrate cleaning waste liquid and a working method thereof. The filtering circulation system comprises a blow-off pipeline and cleaning pools, the blow-off pipeline is in communication with the cleaning pools and a filtering pool, waste liquid discharged from the cleaning pools enters the filtering pool, a filtering check valve is arranged in the blow-off pipeline, the filtering check valve is suitable for preliminarily filtering the waste liquid in the blow-off pipeline and collecting filtered impurities, when the valve body is opened, the containing assembly is closed, the waste liquid in the chamber is filtered through the filter screen and then discharged, when the valve body is closed, the check assembly drives the containing assembly to open, at this time, the backflow waste liquid flushes the filter screen to flush the filtered impurities on the filter screen into the containing assembly for collection, and thus the flushed impurities are collected, and the filtered impurities are prevented from blocking the filter screen to affect the flow rate of the waste liquid.

Description

Technical Field

[0001] This invention belongs to the field of separation technology, specifically relating to rinsing, and more particularly to a filtration and recycling system and its working method for glass substrate cleaning waste liquid. Background Technology

[0002] Glass substrates need to be cleaned during the production process, and the waste liquid from the cleaning needs to be filtered. Filtration can be divided into two steps: coarse filtration in the pipeline and further filtration thereafter. However, in related technologies, a filter check valve is installed in the pipeline for the first step of filtration. The impurities filtered will cause the filter check valve to become blocked, affecting the flow rate of the waste liquid. Backwashing cannot remove the impurities in the filter check valve, so these impurities will still cause blockage when filtration continues.

[0003] Therefore, due to the technical problems of impurities filtering the check valve causing blockage and backwashing impurities being unable to be discharged causing blockage, it is necessary to design a new filtration and circulation system and working method for glass substrate cleaning waste liquid.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0005] This disclosure provides at least one filtration and recycling system and its operating method for glass substrate cleaning waste liquid.

[0006] In a first aspect, embodiments of this disclosure provide a filtration and recycling system for glass substrate cleaning wastewater, comprising:

[0007] Several cleaning tanks suitable for cleaning glass substrates;

[0008] The sewage discharge pipe is connected to each cleaning tank and also to the filtration tank so that the waste liquid discharged from the cleaning tank enters the filtration tank.

[0009] The sewage pipe is equipped with a filter check valve, which is suitable for preliminary filtration of waste liquid in the sewage pipe and collection of filtered impurities.

[0010] The filter check valve includes: a valve body;

[0011] The valve body is connected to the sewage pipe, and a chamber is opened in the valve body, and a check valve component is installed in the chamber;

[0012] The check valve assembly is connected to a filter screen;

[0013] When the valve body is arranged laterally, a receiving component is provided on its inner bottom surface.

[0014] When the valve body is open, the receiving component is closed, and the waste liquid entering the chamber is discharged after being filtered by the filter screen. When the valve body is closed, the check valve component drives the receiving component to open, and at this time the backflow waste liquid washes the filter screen and flushes the impurities filtered on the filter screen into the receiving component for collection.

[0015] In one alternative embodiment, the receiving component includes: a baffle;

[0016] The valve body is provided with a liquid inlet;

[0017] A ring is provided circumferentially on the inner wall of the valve body near the liquid inlet, and a sealing ring is provided obliquely on the side of the ring away from the liquid inlet.

[0018] When the valve body is arranged horizontally, a receiving groove is provided on the inner bottom surface.

[0019] The baffle is connected to the sealing ring and covers the opening of the receiving groove;

[0020] As the sealing ring gradually presses against the side of the ring body away from the liquid inlet, it causes the baffle to swing upward to open the receiving groove.

[0021] In one alternative embodiment, the check valve assembly includes: a piston rod, and a valve body sleeved on the piston rod;

[0022] The valve body is provided with a first limiting rod, the first limiting rod has a first limiting hole, and the first limiting rod is closer to the liquid inlet than the ring body;

[0023] The valve body is provided with a second limiting rod, the second limiting rod is provided with a second limiting hole, and the second limiting rod is located near the liquid outlet of the valve body;

[0024] One end of the piston rod passes through the first limiting hole, and the other end passes through the second limiting hole. The valve body is located between the first limiting rod and the second limiting rod and is located in the cavity.

[0025] A connecting plate is provided on the side of the second limiting rod near the valve body, and a return spring is provided between the connecting plate and the valve body;

[0026] The diameter of the valve body is smaller than the inner diameter of the chamber, and the diameter of the valve body is larger than the inner diameter of the ring body;

[0027] The valve body has a protrusion with a diameter smaller than that of the valve body on the side near the ring. The side wall of the protrusion and the end face of the valve body form a step position for aligning the sealing ring.

[0028] In one optional embodiment, the inner wall of the chamber is provided with an annular groove along the circumferential direction, and an annular plate is provided on the outer wall of the valve body. The annular plate extends into the annular groove and is adapted to move along the length of the piston rod within the annular groove.

[0029] The filter screen is shaped like a mesh bag, with one end of the filter screen open and the other end completely connected to the connecting plate;

[0030] The open end face of the filter screen is connected to the annular plate, and the connection position is close to the inner wall of the cavity;

[0031] The annular plate has several liquid passage holes.

[0032] In one alternative implementation, when waste liquid flows into the valve body from the inlet, the waste liquid drives the valve body closer to the second limit rod. At this time, the step position is disengaged from the sealing ring, and the waste liquid enters the chamber, flows through the filter screen, and flows out from the outlet. The return spring is compressed by the baffle to cover the receiving groove.

[0033] In one optional embodiment, when the waste liquid flow ends, the reset spring resets, the valve body approaches the first limit rod, the step position squeezes the sealing ring tightly against the ring body, sealing the inlet. The sealing ring drives the baffle to swing upward to open the receiving tank. At this time, the waste liquid flowing back into the chamber from the outlet washes down the impurities filtered on the filter screen, and the impurities flow into the receiving tank.

[0034] In one optional embodiment, a pair of sliders are provided in the receiving groove, the outer wall of the sliders contacts the inner wall of the receiving groove, the top surface of the sliders is provided with an extension block, the extension block extends out of the top surface of the receiving groove, and a baffle is located between the two extension blocks.

[0035] The sidewall of the extension block away from the baffle is an inclined surface, and the width of the inclined surface decreases as it gets closer to the ring body;

[0036] The valve body has a pressing block on its side wall that corresponds to the inclined surface, and the pressing block is in contact with the inclined surface.

[0037] In one optional embodiment, a discharge hole communicating with a receiving groove is provided on the side wall of the valve body.

[0038] In one alternative implementation, as the valve body approaches the second limiting rod, the compression block moves along the inclined surface of the extension block, causing the two extension blocks to approach each other and compress the space between the two sliders.

[0039] Secondly, this disclosure also provides a method for operating the above-described filtration and recycling system for glass substrate cleaning waste liquid, comprising:

[0040] When the valve body is open, the receiving component is closed, and the waste liquid entering the chamber is filtered through the filter screen and then discharged. When the valve body is closed, the check valve component drives the receiving component to open, and at this time the backflow waste liquid washes the filter screen and flushes the impurities filtered on the filter screen into the receiving component for collection.

[0041] The beneficial effects of this invention are as follows: The glass substrate cleaning waste liquid filtration and circulation system includes: several cleaning tanks suitable for cleaning glass substrates; a drain pipe connected to each cleaning tank and simultaneously connected to a filter tank, so that waste liquid discharged from the cleaning tanks enters the filter tank; a filter check valve is installed in the drain pipe, which is suitable for preliminary filtration of the waste liquid in the drain pipe and collection of filtered impurities; the filter check valve includes: a valve body; the valve body is connected to the drain pipe. The valve body has a chamber, and a check valve assembly is installed in the chamber. The check valve assembly is connected to a filter screen. When the valve body is arranged horizontally, a receiving assembly is installed on the inner bottom surface. When the valve body is open, the receiving assembly is closed, and the waste liquid entering the chamber is filtered through the filter screen and discharged. When the valve body is closed, the check valve assembly drives the receiving assembly to open. At this time, the backflowing waste liquid flushes the filter screen and flushes the impurities filtered on the filter screen into the receiving assembly for collection. This achieves the collection of flushed impurities and avoids the filtered impurities clogging the filter screen, which would affect the flow rate of the waste liquid.

[0042] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0043] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0044] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of a filtration and recycling system for glass substrate cleaning waste liquid provided in an embodiment of the present disclosure;

[0046] Figure 2 This is a schematic diagram of the structure of a filter check valve provided in an embodiment of the present disclosure;

[0047] Figure 3 A cross-sectional view of a filter check valve provided in an embodiment of this disclosure;

[0048] Figure 4 This is a schematic diagram of the structure of a check valve assembly provided in an embodiment of the present disclosure;

[0049] Figure 5 A cross-sectional view of a valve body provided in an embodiment of this disclosure;

[0050] Figure 6 This is a schematic diagram of the flow direction of waste liquid provided in an embodiment of the present disclosure;

[0051] Figure 7 This is a schematic diagram of the slider movement direction provided in an embodiment of the present disclosure.

[0052] In the picture:

[0053] 1. Cleaning tank;

[0054] 2. Sewage pipes;

[0055] 3 filtration tanks;

[0056] 4. Filter check valve, 41. Valve body, 411. Chamber, 412. Ring body, 413. Receiving groove, 414. Outlet, 415. Inlet, 416. Annular groove, 417. Annular plate, 418. Connecting plate, 419. Filter screen, 42. Check assembly, 421. Piston rod, 422. Valve body, 423. Return spring, 424. First limiting rod, 425. First limiting hole, 426. Second limiting rod, 427. Second limiting hole, 428. Protrusion, 429. Step, 43. Receiving assembly, 431. Baffle, 432. Slider, 433. Extrusion block, 434. Extension block, 44. Sealing ring, 45. Discharge hole, 451. Plug, 46. Skeleton strip, 47. Limiting block. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions 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, 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.

[0058] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0059] Glass substrates need to be cleaned during the production process, and the waste liquid from the cleaning needs to be filtered. Filtration can be divided into two steps: coarse filtration in the pipeline and further filtration thereafter. However, in related technologies, a filter check valve is installed in the pipeline for the first step of filtration. The impurities filtered will cause the filter check valve to become blocked, affecting the flow rate of the waste liquid. Backwashing cannot remove the impurities in the filter check valve, so these impurities will still cause blockage when filtration continues.

[0060] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0061] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0062] like Figure 1 , Figure 2 and Figure 3 As shown, at least one disclosed embodiment provides a filtration and recycling system for glass substrate cleaning wastewater, comprising: a plurality of cleaning tanks 1, adapted for cleaning glass substrates; a drain pipe 2, which is connected to each of the cleaning tanks 1 and simultaneously connected to a filter tank 3, so that the wastewater discharged from the cleaning tanks 1 enters the filter tank 3; a filter check valve 4 is provided in the drain pipe 2, which is adapted to perform preliminary filtration of the wastewater in the drain pipe 2 and collect the filtered impurities; the filter check valve 4 includes: a valve body 41; the valve body 41 is connected to the drain pipe 2, and an opening is provided in the valve body 41. The valve body 411 has a chamber 411, and a check valve assembly 42 is installed inside the chamber 411. The check valve assembly 42 is connected to a filter screen 419. When the valve body 41 is arranged horizontally, a receiving assembly 43 is installed on the inner bottom surface. When the valve body 41 is open, the receiving assembly 43 is closed, and the waste liquid entering the chamber 411 is discharged after being filtered by the filter screen 419. When the valve body 41 is closed, the check valve assembly 42 drives the receiving assembly 43 to open. At this time, the backflowing waste liquid washes the filter screen 419 and flushes the impurities filtered on the filter screen 419 into the receiving assembly 43 for collection. This achieves the collection of the flushed impurities and avoids the impurities from clogging the filter screen 419, which would affect the flow rate of the waste liquid.

[0063] In this embodiment, a filter check valve 4 is installed at the connection point between the cleaning tank 1 and the sewage pipe 2.

[0064] like Figure 3As shown, in one optional embodiment, the receiving component 43 includes: a baffle 431; a liquid inlet 415 is provided on the valve body 41; an annular body 412 is provided circumferentially on the inner wall of the valve body 41 near the liquid inlet 415, and a sealing ring 44 is obliquely provided on the side of the annular body 412 away from the liquid inlet 415; a receiving groove 413 is provided on the inner bottom surface of the valve body 41 when it is arranged laterally; the baffle 431 is connected to the sealing ring 44 and covers the opening of the receiving groove 413; when the sealing ring 44 gradually presses against the side of the annular body 412 away from the liquid inlet 415, it drives the baffle 431 to swing upward to open the receiving groove 413.

[0065] In this embodiment, a limiting block 47 is provided on the baffle 431, and a limiting groove corresponding to the limiting block 47 is opened in the valve body 41. The limiting block 47 extends into the limiting groove to install the baffle 431 and the sealing ring 44. The baffle 431, the sealing ring 44 and the limiting block 47 can all be integrally formed and made of flexible material.

[0066] In this embodiment, when the waste liquid needs to flow through the valve body 41, the baffle 431 covers and closes the receiving tank 413 to prevent the impurities that entered the receiving tank 413 in the previous flush from flowing back into the chamber 411.

[0067] In this embodiment, the sealing ring 44 is compressed and deformed, causing the baffle 431 to swing, thereby opening or closing the receiving groove 413.

[0068] like Figure 3 and Figure 5As shown, in one optional embodiment, the check valve assembly 42 includes: a piston rod 421, and a valve body 422 sleeved on the piston rod 421; a first limiting rod 424 is provided inside the valve body 421, the first limiting rod 424 having a first limiting hole 425, and the first limiting rod 424 being closer to the inlet 415 than the annulus 412; a second limiting rod 426 is provided inside the valve body 41, the second limiting rod 426 having a second limiting hole 427, and the second limiting rod 426 being positioned close to the outlet 414 of the valve body 41; one end of the piston rod 421 passes through the first limiting hole 425, and the other end passes through the first limiting hole 426. Two limiting holes 427 are provided. The valve body 422 is located between the first limiting rod 424 and the second limiting rod 426 and is located in the chamber 411. A connecting plate 418 is provided on the side of the second limiting rod 426 near the valve body 422. A return spring 423 is provided between the connecting plate 418 and the valve body 422. The diameter of the valve body 422 is smaller than the inner diameter of the chamber 411 and the diameter of the valve body 422 is larger than the inner diameter of the ring body 412. A protrusion 428 with a diameter smaller than the diameter of the valve body 422 is provided on the side of the valve body 422 near the ring body 412. The side wall of the protrusion 428 and the end face of the valve body 422 form a step position 429 for aligning the sealing ring 44.

[0069] In this embodiment, the piston rod 421 is slidably connected to the first limiting hole 425 and the second limiting hole 427, so that the piston rod 421 can move smoothly to drive the valve body 422 to move.

[0070] In this embodiment, when no waste liquid flows through, the step position 429 and the sealing ring 44 are kept in close contact by the reset spring 423. At this time, the ring body 412 is blocked and sealed, so that the inlet 415 is blocked and the backflowing waste liquid is prevented from flowing out of the inlet 415.

[0071] In this embodiment, when the sealing ring 44 is pressed tightly against the ring body 412 by the step position 429, the inclined sealing ring 44 drives the baffle 431 to swing upward as it gradually approaches and adheres to the ring body 412, thus opening the receiving groove 413.

[0072] In this embodiment, when the sealing ring 44 does not contact the step position 429, the sealing ring 44 is in an inclined state, and the baffle 431 contacts the inner wall of the chamber 411 to completely close the receiving groove 413.

[0073] like Figure 3As shown, in one optional embodiment, the inner wall of the chamber 411 is provided with an annular groove 416 along the circumference, and the outer wall of the valve body 422 is provided with an annular plate 417, which extends into the annular groove 416 and is adapted to move along the length of the piston rod 421 within the annular groove 416; the filter screen 419 is net-shaped, with one end face of the filter screen 419 open and the other end face completely connected to the connecting plate 418; the open end face of the filter screen 419 is connected to the annular plate 417, and the connection position is close to the inner wall of the chamber 411; the annular plate 417 is provided with a plurality of liquid passage holes.

[0074] In this embodiment, when the valve body 422 moves, it can drive the annular plate 417 to move, thereby pulling the filter screen 419.

[0075] like Figure 3 As shown, in this embodiment, the connecting plate 418 is also provided with a plurality of skeleton strips 46. One end of the skeleton strip 46 is connected to the connecting plate 418, and the other end extends to a position close to the annular plate 417. The inner wall of the filter screen 419 is connected to the skeleton strip 46 to support the filter screen 419.

[0076] In this embodiment, when no waste liquid flows through, the valve body 422 drives the annular plate 417 to move closer to the annular body 412. At this time, the annular plate 417 can pull the filter screen 419, causing the mesh of the filter screen 419 to deform. At this time, the waste liquid that flows back from the outlet 414 to the chamber 411 can flow from outside the filter screen 419 to inside the filter screen 419 to flush down the filtered impurities. At this time, due to the deformation of the mesh, the filtered impurities are more easily flushed down, and the flushed impurities flow into the open receiving tank 413.

[0077] like Figure 6 As shown in the figure, in this embodiment, the flow direction of the waste liquid is as shown in F. The impact force of the waste liquid flowing in from the inlet 415 can drive the valve body 422 to move against the elastic force of the reset spring 423, so that the valve body 41 opens, that is, the inlet 415 is connected to the chamber 411. After the waste liquid enters the chamber 411, it is initially filtered by the filter screen 419 and then flows out from the outlet 414.

[0078] In this embodiment, when no waste liquid flows into the inlet 415, the return spring 423 restores its deformation, thereby blocking and sealing the chamber 411 and the inlet 415 to prevent waste liquid from flowing back.

[0079] In one alternative embodiment, when waste liquid flows into valve body 41 from inlet 415, the waste liquid drives valve body 422 to approach second limit rod 426. At this time, step position 429 disengages from sealing ring 44, waste liquid enters chamber 411, flows through filter screen 419 and flows out from outlet 414, and reset spring 423 is covered by compression baffle 431 to cover receiving groove 413.

[0080] In one alternative embodiment, when the waste liquid flow ends, the reset spring 423 resets, the valve body 422 approaches the first limit rod 424, the step position 429 squeezes the sealing ring 44 tightly against the ring body 412, sealing the inlet 415. The sealing ring 44 drives the baffle 431 to rotate upward to open the receiving tank 413. At this time, the waste liquid flowing back into the chamber 411 from the outlet 414 washes down the impurities filtered on the filter screen 419, and the impurities flow into the receiving tank 413.

[0081] like Figure 3 , Figure 4 and Figure 5 As shown, in an optional embodiment, a pair of sliders 432 are provided in the receiving groove 413. The outer wall of the sliders 432 contacts the inner wall of the receiving groove 413. When the baffle 431 covers the receiving groove 413, the top surface of the sliders 432 can contact the bottom surface of the baffle 431. An extension block 434 is provided on the top surface of the sliders 432, and the extension block 434 extends out of the top surface of the receiving groove 413. The baffle 431 is located between the two extension blocks 434. The side wall of the extension block 434 away from the baffle 431 is an inclined surface, and the width of the inclined surface is smaller as it gets closer to the ring body 412. A pressing block 433 corresponding to the inclined surface is provided on the side wall of the valve body 422, and the pressing block 433 contacts the inclined surface.

[0082] In this embodiment, as the sealing ring 44 gradually presses against the side of the ring body 412 away from the liquid inlet 415, the slider 432 approaches both ends of the receiving groove 413, that is, the distance between the two sliders 432 is the longest. When the valve body 422 moves towards the second limiting rod 426, it drives the squeezing block 433 to move synchronously, and the direction of movement is as follows. Figure 7 As shown in f1, during this process, the baffle 431 covers the receiving groove 413, and part of the slider 432 is covered by the baffle 431. The baffle 431, the receiving groove 413, and the two sliders 432 form a limited space that is not connected to the internal area of ​​the valve body 41. The pressing block 433 contacts the inclined surface of the extension block 434. As the pressing block 433 moves along the corresponding inclined surface, the movement direction of one of the extension blocks 434 is as follows. Figure 7 As shown in f2, the other extension block 434 moves in the opposite direction, which causes the two sliders 432 to move closer together. The space between the two sliders 432 is compressed, and the pressure in the space increases. At this time, the discharge hole 45 can be opened to discharge the impurities in the receiving groove 413. Since the pressure in the receiving groove 413 is greater than the external pressure at this time, it is easier to discharge the impurities.

[0083] In this embodiment, the slider 432 and the inner wall of the receiving groove 413 can be connected by a spring, so that the slider 432 can be reset when the baffle 431 is opened.

[0084] like Figure 3As shown, in one optional embodiment, the valve body 41 has a discharge hole 45 that communicates with the receiving groove 413 on its side wall.

[0085] In one alternative embodiment, when the valve body 422 approaches the second limiting rod 426, the compression block 433 moves along the inclined surface of the extension block 434, causing the two extension blocks 434 to approach each other and compress the space between the two sliders 432.

[0086] In this embodiment, the discharge hole 45 can be blocked by a plug 451, etc. When waste liquid flows into the valve body 41 from the inlet 415, the plug 451 can be opened to facilitate the discharge of impurities in the receiving tank 413.

[0087] At least one other disclosed embodiment also provides a method of operating the above-described glass substrate cleaning waste liquid filtration and circulation system, including: when the valve body 41 is open, the receiving component 43 is closed, and the waste liquid entering the chamber 411 is discharged after being filtered by the filter screen 419; when the valve body 41 is closed, the check component 42 drives the receiving component 43 to open, at which time the backflow waste liquid washes the filter screen 419 and flushes the impurities filtered on the filter screen 419 into the receiving component 43 for collection.

[0088] In summary, this glass substrate cleaning wastewater filtration and circulation system includes: several cleaning tanks 1, suitable for cleaning glass substrates; a drain pipe 2, which is connected to each cleaning tank 1 and also connected to a filter tank 3, so that the wastewater discharged from the cleaning tanks 1 enters the filter tank 3; a filter check valve 4 is installed in the drain pipe 2, which is suitable for preliminary filtration of the wastewater in the drain pipe 2 and collection of filtered impurities; the filter check valve 4 includes: a valve body 41; the valve body 41 is connected to the drain pipe 2, and a chamber 411 is formed inside the valve body 41. A check valve assembly 42 is provided inside the chamber 411; the check valve assembly 42 is connected to a filter screen 419; a receiving assembly 43 is provided on the inner bottom surface of the valve body 41 when it is arranged horizontally; when the valve body 41 is open, the receiving assembly 43 is closed, and the waste liquid entering the chamber 411 is discharged after being filtered by the filter screen 419; when the valve body 41 is closed, the check valve assembly 42 drives the receiving assembly 43 to open, at which time the backflow waste liquid washes the filter screen 419 and flushes the impurities filtered on the filter screen 419 into the receiving assembly 43 for collection, thereby realizing the collection of the flushed impurities and avoiding the impurities filtered down from clogging the filter screen 419 and affecting the flow rate of the waste liquid.

[0089] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0090] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0091] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0092] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A filtration and recycling system for waste liquid from cleaning glass substrates, characterized in that, include: Several cleaning tanks (1) are suitable for cleaning glass substrates; Sewage pipe (2) is connected to each cleaning pool (1) and is also connected to the filter pool (3) so that the waste liquid discharged from the cleaning pool (1) enters the filter pool (3); The sewage pipe (2) is equipped with a filter check valve (4), which is suitable for performing preliminary filtration of waste liquid in the sewage pipe (2) and collecting the filtered impurities. The filter check valve (4) includes: valve body (41); The valve body (41) is connected to the sewage pipe (2), and a chamber (411) is provided inside the valve body (41), and a check valve assembly (42) is provided inside the chamber (411). The check valve assembly (42) is connected to a filter screen (419). When the valve body (41) is arranged horizontally, a receiving component (43) is provided on the inner bottom surface. When the valve body (41) is open, the receiving component (43) is closed, and the waste liquid entering the chamber (411) is filtered through the filter screen (419) and discharged. When the valve body (41) is closed, the check component (42) drives the receiving component (43) to open. At this time, the backflow waste liquid washes the filter screen (419) and flushes the impurities filtered on the filter screen (419) into the receiving component (43) for collection. The receiving component (43) includes: a baffle (431); The valve body (41) is provided with a liquid inlet (415). The valve body (41) has an annular body (412) arranged circumferentially near the liquid inlet (415) on the inner wall of the valve body (41), and a sealing ring (44) is arranged obliquely on the side of the annular body (412) away from the liquid inlet (415). When the valve body (41) is arranged horizontally, a receiving groove (413) is provided on the inner bottom surface. The baffle (431) is connected to the sealing ring (44) and covers the opening of the receiving groove (413); When the sealing ring (44) gradually presses against the side of the ring body (412) away from the liquid inlet (415), it drives the baffle (431) to swing upward to open the receiving groove (413). The check valve assembly (42) includes: a piston rod (421) and a valve body (422) sleeved on the piston rod (421). The valve body (41) is provided with a first limiting rod (424), the first limiting rod (424) is provided with a first limiting hole (425), and the first limiting rod (424) is closer to the liquid inlet (415) than the ring (412). A second limiting rod (426) is provided inside the valve body (41). The second limiting rod (426) has a second limiting hole (427). The second limiting rod (426) is located near the liquid outlet (414) of the valve body (41). One end of the piston rod (421) passes through the first limiting hole (425) and the other end passes through the second limiting hole (427). The valve body (422) is located between the first limiting rod (424) and the second limiting rod (426) and is located in the chamber (411). A connecting plate (418) is provided on the side of the second limiting rod (426) near the valve body (422), and a return spring (423) is provided between the connecting plate (418) and the valve body (422). The diameter of the valve body (422) is smaller than the inner diameter of the chamber (411), and the diameter of the valve body (422) is larger than the inner diameter of the ring body (412); The valve body (422) has a protrusion (428) with a diameter smaller than that of the valve body (422) on one side near the ring (412). The side wall of the protrusion (428) and the end face of the valve body (422) form a step (429) for aligning with the sealing ring (44). The inner wall of the chamber (411) is provided with an annular groove (416) along the circumferential direction, and an annular plate (417) is provided on the outer wall of the valve body (422). The annular plate (417) extends into the annular groove (416) and is adapted to move along the length direction of the piston rod (421) within the annular groove (416). The filter (419) is net-shaped, with one end of the filter (419) open and the other end completely connected to the connecting plate (418); The open end face of the filter screen (419) is connected to the annular plate (417), and the connection position is close to the inner wall of the chamber (411); The annular plate (417) has several liquid passage holes.

2. The filtration and recycling system for glass substrate cleaning waste liquid as described in claim 1, characterized in that, When the waste liquid flows into the valve body (41) from the inlet (415), the waste liquid drives the valve body (422) to approach the second limit rod (426). At this time, the step position (429) is separated from the sealing ring (44), the waste liquid enters the chamber (411), flows through the filter screen (419) and flows out from the outlet (414). The reset spring (423) is compressed, and the baffle (431) covers the receiving groove (413).

3. The filtration and recycling system for glass substrate cleaning waste liquid as described in claim 1, characterized in that, When the waste liquid flow ends, the reset spring (423) resets, the valve body (422) approaches the first limit rod (424), the step position (429) squeezes the sealing ring (44) tightly against the ring body (412), sealing the inlet (415), the sealing ring (44) drives the baffle (431) to swing upward to open the receiving tank (413), at this time the waste liquid rushing into the chamber (411) from the outlet (414) washes down the filter impurities on the filter screen (419) and flows into the receiving tank (413).

4. The filtration and recycling system for glass substrate cleaning waste liquid as described in claim 1, characterized in that, A pair of sliders (432) are provided in the receiving groove (413). The outer wall of the slider (432) is in contact with the inner wall of the receiving groove (413). An extension block (434) is provided on the top surface of the slider (432). The extension block (434) extends out of the top surface of the receiving groove (413). A baffle (431) is located between the two extension blocks (434). The side wall of the extension block (434) away from the baffle (431) is an inclined surface, and the width of the inclined surface is smaller as it gets closer to the ring (412); The valve body (422) has a pressing block (433) on its side wall that corresponds to the inclined surface, and the pressing block (433) is in contact with the inclined surface.

5. The filtration and recycling system for glass substrate cleaning waste liquid as described in claim 4, characterized in that, The valve body (41) has a discharge hole (45) on its side wall that communicates with the receiving groove (413).

6. The filtration and recycling system for glass substrate cleaning waste liquid as described in claim 4, characterized in that, When the valve body (422) approaches the second limit rod (426), the compression block (433) moves along the inclined surface of the extension block (434), causing the two extension blocks (434) to approach each other and compress the space between the two sliders (432).

7. A method for operating a filtration and recycling system for glass substrate cleaning waste liquid as described in claim 1, characterized in that, include: When the valve body (41) is open, the receiving component (43) is closed, and the waste liquid entering the chamber (411) is filtered through the filter screen (419) and discharged. When the valve body (41) is closed, the check component (42) drives the receiving component (43) to open. At this time, the backflow waste liquid washes the filter screen (419) and flushes the impurities filtered on the filter screen (419) into the receiving component (43) for collection.

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