Integrated device for filter outlet and backwash outlet

Abstract

The present invention provides an integrated water outlet and backwash outlet device for a filter tank. The device comprises: a water outlet trough having an upwardly opening water outlet trough; a backwash trough having an upwardly opening backwash trough, the water outlet trough being located above the backwash trough; a guide plate extending downward from the backwash trough toward the center of the backwash trough; a primary airflow baffle located on the side of the guide plate facing away from the backwash trough, the bottom edge of the primary airflow baffle being spaced apart from the guide plate to form a primary water flow opening, the primary airflow baffle extending upward from the bottom toward the center of the backwash trough, and the top edge of the secondary airflow baffle being higher than the water outlet trough; and a secondary airflow baffle located between the guide plate and the primary airflow baffle, the bottom edge of the secondary airflow baffle being spaced apart from the guide plate to form a secondary water flow opening, the top edge of the secondary airflow baffle being higher than the water outlet trough, the secondary water flow opening being higher than the primary water flow opening, and the water outlet trough and the backwash trough being connected to the primary water flow opening via the secondary water flow opening. The device can intercept filter material to prevent filter material loss.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, in particular to an integrated device for filter water outlet and backwash water outlet. Background Art

[0002] Traditional filter tanks are widely used in various projects such as municipal sewage and industrial wastewater. Their commonly used filter media can be divided into heavy filter media and light filter media. Heavy filter media are represented by the most widely used quartz sand, ordinary ceramsite and volcanic rock fillers. They are heavy in mass and usually deposited at the bottom of the filter tank, making them difficult to lose. Light filter media are typified by activated carbon and polyurethane, which are light in mass or have smaller particles. In actual engineering applications, under the push of water and gas, the lightweight filter media is suspended in the filter tank, which causes the filter media to be lost from the outlet or backwash outlet. This not only results in waste of filter media, increased costs, and reduced stability of the filter tank, but also causes significant interference to subsequent processes and makes the equipment extremely susceptible to damage. The design of the outlet weir can better avoid the above risks.

[0003] The water outlet and backwash outlet in the existing technology are mainly equipped with water outlet weir plates or baffles. By controlling the spacing and using baffles of different specifications to increase the resistance, the filter material passing through the water outlet or backwash outlet is intercepted, or the slope is used to accelerate the sedimentation of the filter material in the outlet water, and then the baffle is used to resist some of the filter material that has not settled.

[0004] However, this outlet weir plate and baffle may have a certain interception effect on heavy filter media. However, due to its small mass, light filter media can easily overflow the slope with water and gas and pass through the interception of the outlet weir, thus still causing significant loss. Summary of the Invention

[0005] In order to at least partially solve the problems existing in the prior art, an embodiment of the present invention provides an integrated device for water outlet and backwash water outlet for a filter. The integrated device for water outlet and backwash water outlet for a filter comprises: a water outlet trough, the water outlet trough having a water outlet trough opening upward and a water outlet provided on its trough wall; a backwash trough, the backwash trough having a backwash trough opening upward and a backwash water outlet provided on its trough wall, the water outlet trough being located above the backwash trough; a guide plate, the guide plate extending downward from the backwash trough opening and in a direction away from the center of the backwash trough; a primary air flow baffle, the primary air flow baffle being located on the side of the guide plate facing away from the backwash trough, the bottom edge of the primary air flow baffle being spaced apart from the guide plate to A primary water flow opening is formed, the primary air flow baffle extends from bottom to top in a direction away from the center of the backwash slot, and the top edge of the primary air flow baffle is higher than the water outlet slot; and a secondary air flow baffle is located between the guide plate and the primary air flow baffle, the bottom edge of the secondary air flow baffle is spaced from the guide plate to form a secondary water flow opening, the top edge of the secondary air flow baffle is higher than the water outlet slot, the secondary water flow opening is higher than the primary water flow opening, and the water outlet slot and the backwash slot are connected to the primary water flow opening through the secondary water flow opening.

[0006] Exemplarily, a guide plate is connected to the bottom edge of the secondary air flow baffle, and the guide plate is located below the secondary air flow baffle and is spaced apart from the guide plate to form a drainage channel between the guide plate and the guide plate, and the secondary water flow opening is located at the outlet of the drainage channel, and the guide plate is spaced apart from the primary air flow baffle.

[0007] Exemplarily, the drainage channel has an increasing size from bottom to top.

[0008] Exemplarily, the guide plate is inclined from bottom to top toward the backwash tank.

[0009] Exemplarily, the angle between the guide plate and the secondary air flow baffle is an obtuse angle.

[0010] Exemplarily, the size of the primary water flow opening is the same as the size of the inlet of the drainage channel.

[0011] Exemplarily, the secondary air flow baffle extends from bottom to top in a direction away from the center of the backwash tank.

[0012] Exemplarily, the angle between the primary air flow baffle and the horizontal direction is greater than the angle between the secondary air flow baffle and the horizontal direction.

[0013] Exemplarily, the wall of the backwash tank includes an inclined bottom wall, and the backwash water outlet is arranged on the lower part of the bottom wall.

[0014] Exemplarily, the trough wall of the backwash trough includes a side wall and a V-shaped bottom wall, the side wall is inclined upward from the top edge of the bottom wall and toward the water outlet trough, the upper part of the guide plate is closely connected to the outer surface of the side wall, and the lower part of the guide plate and the bottom wall are combined to form an air collecting trough.

[0015] Exemplarily, the gas collecting tank is in an inverted V shape.

[0016] Exemplarily, the integrated filter outlet and backwash outlet device extends along the longitudinal direction, and the integrated filter outlet and backwash outlet device also includes an end sealing plate, which extends in a transverse direction perpendicular to the longitudinal direction. The ends of the water outlet trough, the backwash trough, the guide plate, the primary air flow baffle and the secondary air flow baffle in the longitudinal direction are all sealedly connected to the end sealing plate, the air collecting trough is connected to the outside of the end sealing plate, and the top edge of the end sealing plate is higher than the water outlet trough.

[0017] Exemplarily, the integrated filter water outlet and backwash water outlet device further includes an exhaust pipe, one end of which is connected to the air collecting tank, and the other end of which extends to a side of the primary air flow baffle away from the water outlet tank.

[0018] Exemplarily, the bottom of the water outlet trough is located in the backwash trough, and the water outlet trough opening is higher than the backwash trough opening.

[0019] Illustratively, in a cross section perpendicular to the extension direction of the integrated filter outlet and backwash outlet device, the integrated filter outlet and backwash outlet device has a symmetrical structure in the horizontal direction.

[0020] Exemplarily, the number of the water outlet trough and the number of the backwash trough are both one.

[0021] Whether it is heavy filter media or light filter media, the integrated filter effluent and backwash effluent device can effectively intercept it, ensuring that the filter media will not overflow with the water, thereby avoiding the loss of filter media. This can greatly reduce the operation and maintenance costs of the integrated filter effluent and backwash effluent device, while improving the stability of the integrated filter effluent and backwash effluent device. Since there is no filter media in the water flowing out of the integrated filter effluent and backwash effluent device, its water quality is better, so the interference with subsequent processes is small, and no subsequent equipment damage will be caused. In addition, due to the provision of the outlet trough and the backwash trough, the integrated filter effluent and backwash effluent device can take into account the work of the outlet weir, collecting effluent and backwash water, which greatly improves the functionality and scope of use of the integrated filter effluent and backwash effluent device, and the integrated filter effluent and backwash effluent device has high practicality.

[0022] This summary introduces a series of simplified concepts that will be further described in the detailed description. This summary is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0023] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following drawings of the present invention are hereby incorporated into the present invention for understanding the present invention. The drawings show embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0025] Figure 1 A perspective view of an integrated device for filter water outlet and backwash water outlet according to an exemplary embodiment of the present invention;

[0026] Figure 2 for Figure 1 The front view of the integrated filter outlet and backwash outlet device shown;

[0027] Figure 3A for Figure 2 The AA cross-section of the integrated filter effluent and backwash effluent device is shown, wherein the arrows schematically show the flow direction of the objects;

[0028] Figure 3B for Figure 2 The BB section of the integrated filter effluent and backwash effluent device is shown, wherein the arrows schematically indicate the flow direction of the objects;

[0029] Figure 4A front cross-sectional view of a water treatment system to which the integrated filter tank effluent and backwash effluent device according to an exemplary embodiment of the present invention is applied; and

[0030] Figure 5 for Figure 4 The side cross-sectional view of a water treatment system using an integrated filter effluent and backwash effluent device is shown.

[0031] The above drawings include the following reference numerals:

[0032] 100. Integrated device for water outlet and backwash water outlet for filter tank; 210. Water outlet trough; 211. Water outlet trough opening; 212. Water outlet; 220. Backwash trough; 221. Backwash trough opening; 222. Backwash outlet; 223. Bottom wall; 224. Side wall; 300. Guide plate; 410. Primary air flow baffle; 411. Primary water flow opening; 420. Secondary air flow baffle; 421. Secondary water flow opening; 430. Drainage plate; 431. Drainage channel; 440. Gas collecting trough; 450. End sealing plate; 460. Exhaust pipe; 500. Filter tank. DETAILED DESCRIPTION

[0033] In the following description, a large amount of detail is provided to facilitate a thorough understanding of the present invention. However, it will be appreciated by those skilled in the art that the following description merely illustrates preferred embodiments of the present invention, and that the present invention may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well known in the art have not been described in detail.

[0034] In order to improve the interception effect of filter media (especially lightweight filter media), an embodiment of the present invention provides an integrated device for filter outlet and backwash outlet. The integrated device for filter outlet and backwash outlet can be applied to various water treatment systems. The water treatment system includes a filter and an integrated device for filter outlet and backwash outlet. The integrated device for filter outlet and backwash outlet can be arranged on the upper part of the filter. Figure 1-2 , 3A-3B and 5 describe in detail the integrated device for filter water outlet and backwash water outlet according to an embodiment of the present invention.

[0035] like Figure 5 As shown, the water treatment system may include a filter 500 and an integrated filter outlet and backwash outlet device 100. The filter outlet and backwash outlet integrated device 100 may be disposed on the upper portion of the filter 500.

[0036] like Figure 1-2As shown in Figures 3A-3B , the integrated filter water outlet and backwash water outlet device 100 may include an outlet trough 210 , a backwash trough 220 , a guide plate 300 , a primary air flow baffle 410 and a secondary air flow baffle 420 .

[0037] The water outlet trough 210 may have a water outlet trough opening 211. The opening of the water outlet trough 211 faces upward. A water outlet 212 may be provided on the trough wall (including the bottom wall and the side walls) of the water outlet trough 210. Preferably, the water outlet 212 may be provided at the lower portion of the water outlet trough 210. The water outlet 212 may extend horizontally. Typically, the water outlet trough 210 is elongated, and ribs may be connected between a pair of side walls extending along the length of the water outlet trough 210 to enhance the strength of the water outlet trough 210.

[0038] The backwash tank 220 may have a backwash slot 221. The backwash slot 221 opens upward. A backwash outlet 222 may be provided on the tank wall (including the bottom wall and the side walls) of the backwash tank 220. Preferably, the backwash outlet 222 may be provided at the lower portion of the backwash tank 220. The backwash outlet 222 may extend vertically.

[0039] The water outlet trough 210 is located above the backwash trough 220. In one embodiment, the water outlet trough 210 is completely located above the backwash trough 220. The bottom of the water outlet trough 210 can be located above the backwash notch 221 of the backwash trough 220. In another embodiment, a portion of the water outlet trough 210 is located above the backwash trough 220. The bottom of the water outlet trough 210 can be accommodated in the backwash trough 220, and the water outlet notch 211 can be higher than the backwash notch 221. In this way, the height of the integrated device for the water outlet and backwash water outlet for the filter tank can be reduced, making the structure of the integrated device for the water outlet and backwash water outlet for the filter tank more compact. The water outlet trough 210 and the backwash trough 220 can be connected by ribs. When the water outlet trough 210 and the backwash trough 220 overlap in the vertical direction, it is more convenient to set the ribs for connection.

[0040] When the water treatment system is operating normally, the filter media within filter tank 500 can process the water (including but not limited to filtration). The outlet tank 210 can be used to collect the purified water produced after treatment. During this process, the purified water treated by the filter media can overflow from the wall of the outlet tank 210 and be collected in the outlet tank 210 through the outlet tank opening 211, and then flow out through the outlet 212 to the external clean water tank.

[0041] When the water treatment system is in a backwashing state, backwash tank 220 can be used to collect backwash water. The purpose of backwashing is to remove impurities trapped in the filter media layer, allowing the filter tank to quickly restore its processing capacity. Backwash tank 220 can be used to collect backwash water. During this process, backwash water can overflow from the walls of backwash tank 220 and be collected in backwash tank 220 through backwash notch 221. From there, it can flow out through backwash outlet 222 to an external backwash drain tank.

[0042] The deflector 300 can extend downward from the backwash notch 221 and away from the center of the backwash tank 220. That is, the deflector 300 extends downward and outward from the outlet tank 210 relative to the outlet tank 210. In the illustrated embodiment, the deflector 300 is arranged in an inclined flat plate shape. In other embodiments not shown, the deflector 300 may also have a certain degree of curvature, as long as it tends to extend outward in the downward direction. Furthermore, in the illustrated embodiment, the sidewalls of the backwash tank 220 are inclined, and the deflector 300 is attached to the inclined sidewalls of the backwash tank 220. In other embodiments not shown, the sidewalls of the backwash tank 220 may be vertical. In this case, the top edge of the deflector 300 is connected to the backwash notch 221 of the backwash tank 220, and the remaining portion may be spaced apart from the backwash tank 220. In order for water to enter the backwash tank 220, it needs to first climb along the slope of the guide plate 300 until it reaches the backwash slot 221 and flows into the backwash tank 220. During the process of climbing along the slope of the guide plate 300, the filter material can accelerate the sedimentation.

[0043] The primary air flow baffle 410 can be located on the side of the guide plate 300 facing away from the backwash slot 220. That is, the primary air flow baffle 410 and the backwash slot 220 are respectively located on both sides of the guide plate 300. The bottom edge of the primary air flow baffle 410 can be spaced apart from the guide plate 300 to form a primary water flow opening 411, such as Figures 3A-3B As shown. The width of the primary water flow opening 411 can be designed according to the design flow rate of the integrated device for filter effluent and backwash effluent, the aeration conditions in the filter, etc. For example, the width of the primary water flow opening 411 can be between 30 mm and 70 mm. The primary air flow baffle 410 can extend from bottom to top in a direction away from the center of the backwash tank 220. When viewed in a vertical downward direction, the guide plate 300 and the primary air flow baffle 410 extend in opposite directions. Specifically, when viewed in a vertical downward direction, the guide plate 300 extends in a direction close to the center of the backwash tank 220, while the primary air flow baffle 410 extends in a direction away from the center of the backwash tank 220.

[0044] The secondary air flow baffle 420 can be located between the guide plate 300 and the primary air flow baffle 410. The secondary air flow baffle 420 can have the same or opposite extension as the primary air flow baffle 410. Specifically, the secondary air flow baffle 420 can extend from bottom to top, away from the center of the backwash trough 220, as shown in the figure. The secondary air flow baffle 420 can also extend from bottom to top, toward the center of the backwash trough 220. Alternatively, the secondary air flow baffle 420 can extend vertically. The primary air flow baffle 410 and the secondary air flow baffle 420 can be connected by ribs. The connected primary air flow baffle 410 and secondary air flow baffle 420 can be connected to the outlet trough 210, the backwash trough 220, and the guide plate 300 via an end cap 450 (which will be described in detail later). Of course, ribs can also be used to connect the outlet trough 210, the backwash trough 220, and the guide plate 300.

[0045] The bottom edge of the secondary air flow baffle 420 can be spaced apart from the guide plate 300 to form a secondary water flow opening 421. The secondary water flow opening 421 can be higher than the primary water flow opening 411. The outlet slot 211 and the backwash slot 221 can be connected to the primary water flow opening 411 through the secondary water flow opening 421. Before entering the backwash slot 220, water must pass through the primary water flow opening 411 and the secondary water flow opening 421. The secondary water flow opening 421 and the primary water flow opening 411 can have similar widths. However, preferably, the width of the secondary water flow opening 421 is greater than the width of the primary water flow opening 411. Exemplarily, the width of the secondary water flow opening 421 can be between 80 mm and 120 mm. When the width of the secondary water flow opening 421 is greater than the width of the primary water flow opening 411, the flow rate of water can be reduced when passing through the secondary water flow opening 421, which further facilitates the sedimentation of the filter material.

[0046] The primary air flow baffle 410 and the secondary air flow baffle 420 may be arranged in an inclined manner in a flat plate shape, or may have a certain degree of curvature.

[0047] To facilitate understanding of the integrated filter effluent and backwash effluent device 100 provided in an embodiment of the present invention, the working principle and working process of the integrated filter effluent and backwash effluent device 100 disposed on the upper part of the filter 500 will be described in detail below.

[0048] See also Figure 4-5Regardless of whether the water treatment system is in a normal water production state or a backwashing condition, the water in the filter 500 (including the aerated filter and the non-aerated filter) is usually mixed with filter media and gas. Under the action of the gas, the filter media (especially the lightweight filter media) will flip along with the water, thereby forming a three-phase mixed state of filter media, water and gas. When the water level rises, the water can gradually flow upward along the guide plate 300. During the upward flow of water, the flow rate of the water is low, the stability of the water is high, and the gas in the water will gradually rise upward. When the water flows upward to the primary water flow opening 411, the gas in the water can be discharged along the primary air flow baffle 410 to the outside of the integrated filter water outlet and backwash water outlet device 100. At this time, a small amount of gas will still pass through the primary water flow opening 411. When the water flows upward to the secondary water flow opening 421, the gas in the water can be discharged along the secondary air flow baffle 420 to the outside of the integrated filter water outlet and backwash water outlet device 100. In this way, through the double action of the primary air flow baffle 410 and the secondary air flow baffle 420, the gas in the water can be discharged as much as possible. Since there is no or almost no gas in the water, the filter material will no longer flip. Under the action of gravity, the filter material will gradually settle. As the water flows upward, the filter material will settle into the filter tank 500 along the guide plate 300, thereby achieving the effect of intercepting the filter material. Moreover, the primary air flow baffle 410 and the secondary air flow baffle 420 also have a limiting effect on the filter material, which can limit most of the filter material outside the primary air flow baffle 410 and the secondary air flow baffle 420, further intercepting the filter material.

[0049] The top edges of the primary airflow baffle 410 and the secondary airflow baffle 420 can be higher than the outlet slot 211. The water outside the primary airflow baffle 410 and the secondary airflow baffle 420 may contain a large amount of gas. The top edges of the primary airflow baffle 410 and the secondary airflow baffle 420 being higher than the outlet slot 211 can prevent filter material outside the primary airflow baffle 410 and the secondary airflow baffle 420 from being swept by the water and entering the inside of the primary airflow baffle 410 and the secondary airflow baffle 420, thereby preventing the filter material from entering the outlet slot 210 and the backwash slot 220. Therefore, the integrated filter tank outlet and backwash outlet device 100 can replace the existing outlet weir and achieve a better interception effect on the filter material.

[0050] Water overflowing the guide plate 300 can flow into the backwash tank 220 through the backwash notch 221 and then be directed to the exterior of the integrated filter water outlet and backwash water outlet device 100 through the backwash outlet 222. Alternatively, by closing the backwash outlet 222, once the backwash tank 220 is filled with water, the water can flow into the outlet tank 210 through the outlet notch 211 and then be directed to the exterior of the integrated filter water outlet and backwash water outlet device 100 through the outlet 212. Closing the backwash outlet 222 can include providing a valve on the backwash outlet 222, etc., which is not further limited by the present invention. Since the quality of backwash water is generally poor, while the quality of purified water is generally better, by allowing water to enter the backwash tank 220 first and be discharged promptly, backwash water can be prevented from contaminating the outlet tank 210. This allows the outlet tank 210 to remain clean and sanitary, thereby ensuring that the quality of the purified water is not contaminated.

[0051] Therefore, whether it is heavy filter material or light filter material, the filter effluent and backwash effluent integrated device 100 can effectively intercept it, ensuring that the filter material will not overflow with the water, thereby avoiding the loss of filter material. This can greatly reduce the operation and maintenance costs of the filter effluent and backwash effluent integrated device 100, and at the same time improve the stability of the filter effluent and backwash effluent integrated device 100. Since there is no filter material in the water flowing out of the filter effluent and backwash effluent integrated device 100, its water quality is better, so the interference with subsequent processes is small, and no subsequent equipment damage will be caused. In addition, due to the provision of the outlet trough 210 and the backwash trough 220, the filter effluent and backwash effluent integrated device 100 can take into account the work of the water outlet weir, collecting effluent and backwash water, greatly improving the functionality and scope of use of the filter effluent and backwash effluent integrated device 100, and the filter effluent and backwash effluent integrated device 100 has high practicality.

[0052] It should be noted that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, such as providing a tertiary airflow baffle, a quadruple airflow baffle, etc., so as to further guide the gas in the water. These variations and modifications all fall within the scope of protection claimed by the present invention. Since the provision of the primary airflow baffle 410 and the secondary airflow baffle 420 can guide the gas as much as possible in most application scenarios to meet user needs, and if the airflow baffle is added, the structure of the integrated device 100 for filter water outlet and backwash water outlet will be increased and the cost will increase, so the illustrated embodiment of the present invention is more preferred.

[0053] In the filter tank water outlet and backwash water outlet integrated device 100 shown in the figure, the filter tank water outlet and backwash water outlet integrated device 100 can extend along the longitudinal direction. That is to say, the filter tank water outlet and backwash water outlet integrated device 100 is elongated as a whole. In other embodiments not shown, the filter tank water outlet and backwash water outlet integrated device 100 can also be other shapes such as arc, circle, rectangle as a whole. Therefore, according to the structure of the filter tank, the filter tank water outlet and backwash water outlet integrated device 100 can be adapted thereto, so the applicability of the filter tank water outlet and backwash water outlet integrated device 100 is higher.

[0054] In a preferred embodiment, Figure 1-2 As shown in FIG3A-3B, in a cross section perpendicular to the extending direction of the filter tank outlet and backwash outlet integrated device 100, the filter tank outlet and backwash outlet integrated device 100 may have a symmetrical structure in the horizontal direction. Figure 4-5 , the integrated device 100 for filter outlet and backwash outlet can play the role of intercepting filter material on both sides in the horizontal direction, so the working efficiency of the integrated device 100 for filter outlet and backwash outlet is higher and the outlet flow rate is larger. This integrated device 100 for filter outlet and backwash outlet is suitable for being placed in the middle area of ​​the upper part of the filter 500. For example, a plurality of such integrated devices 100 for filter outlet and backwash outlet can be placed side by side on the upper part of the filter 500. For the integrated device 100 for filter outlet and backwash outlet that is only provided with the guide plate 300, the primary air flow baffle 410 and the secondary air flow baffle 420 on one side, the side where they are not provided can be abutted against any suitable water blocking member to prevent water from entering the outlet trough 210 and the backwash trough 220 from this side.

[0055] Furthermore, if Figure 1-2 As shown in Figures 3A-3B , the number of outlet troughs 210 and backwash troughs 220 can each be one. This allows water overflowing from the guide plates 300 on both sides of the integrated filter outlet and backwash outlet device 100 to flow into the same outlet trough 210 and backwash trough 220. This arrangement makes the structure of the integrated filter outlet and backwash outlet device 100 simpler and more cost-effective. Furthermore, the single outlet 212 and backwash outlet 222 facilitates the subsequent processing of water flowing out of both outlets, facilitating the subsequent process.

[0056] In a preferred embodiment, Figures 3A-3BAs shown, the secondary airflow baffle 420 can extend upward from the bottom, away from the center of the backwash tank 220. This orientation of the secondary airflow baffle 420 facilitates the drainage of gas from the water along it to the exterior of the integrated filter tank outlet and backwash outlet device 100. Furthermore, even if filter media rolls outside the secondary airflow baffle 420, it is unlikely to pass over the secondary airflow baffle 420 and enter between the secondary airflow baffle 420 and the guide plate 300, thereby preventing the filter media from entering the backwash tank 220.

[0057] Furthermore, if Figures 3A-3B As shown, the angle between the primary airflow baffle 410 and the horizontal direction can be greater than the angle between the secondary airflow baffle 420 and the horizontal direction. Since the primary airflow baffle 410 is responsible for the first gas discharge, there is more gas there. By increasing the angle between the primary airflow baffle 410 and the horizontal direction, the gas in the water can be easily discharged along the baffle to the outside of the integrated filter water outlet and backwash water outlet device 100.

[0058] In a preferred embodiment, Figures 3A-3B As shown, the bottom edge of the secondary airflow baffle 420 can be connected to a guide plate 430 by any suitable means, such as welding, gluing, or integral molding. The guide plate 430 can be located below the secondary airflow baffle 420. The guide plate 430 can be spaced apart from the guide plate 300 to form a diversion channel 431 between the guide plate 430 and the guide plate 300. The secondary water flow opening 421 can be located at the outlet of the diversion channel 431. As water passes through the diversion channel 431 and reaches the secondary water flow opening 421, the blocking effect of the guide plate 430 and the flow limiting effect of the diversion channel 431 prevent vibrations from the water outside the primary airflow baffle 410 and the secondary airflow baffle 420 from being transmitted into the diversion channel 431. This allows the water inside the secondary airflow baffle 420 and the guide plate 430 to rise quietly and slowly along the guide plate 300. The guide plate 430 can be spaced apart from the primary airflow baffle 410. Since most of the gas in the water has been discharged, under the flow limiting effect of the drainage channel 431, when the water passes through the drainage channel 431, it will further facilitate the sedimentation of the filter material in the water, ensuring that the filter material will not overflow into the backwash tank 220 along with the water. The filter tank effluent and backwash effluent integrated device 100 has better filter material interception performance.

[0059] Furthermore, if Figures 3A-3B As shown, the drainage channel 431 has an increasing size from bottom to top. By increasing the size of the drainage channel 431, the flow rate of water can be reduced, and the sedimentation effect of the filter material is better.

[0060] Alternatively, as Figures 3A-3BAs shown, the angle between the guide plate 430 and the secondary air flow baffle 420 can be an obtuse angle. In this way, gas is not easily deposited between the guide plate 430 and the secondary air flow baffle 420, and the gas outlet effect is better.

[0061] Alternatively, as Figures 3A-3B As shown, the guide plate 430 can be tilted from bottom to top toward the backwash tank 220. With this arrangement, even if filter material rolls outside the secondary air flow baffle 420, the filter material will not be deposited between the guide plate 430 and the secondary air flow baffle 420, thereby ensuring that the filter material can settle into the filter tank 500 as much as possible.

[0062] Alternatively, as Figures 3A-3B As shown, the size of the primary water flow opening 411 can be the same as the size of the inlet of the drainage channel 431. This sameness should take into account unavoidable errors, which can be errors in process manufacturing or design. The extent of the error difference should be determined by those skilled in the art. This arrangement improves water stability, which is conducive to the discharge of gas and the sedimentation of filter media.

[0063] like Figures 3A-3B As shown, the wall of the backwash tank 220 may include a bottom wall 223 and a side wall 224. In a preferred embodiment, as shown in FIG. Figures 3A-3B As shown, the bottom wall can be inclined. Backwash outlet 222 can be located at the lower portion of the bottom wall. Since backwash water is typically of poor quality, this configuration prevents dirt from accumulating within backwash tank 220. This reduces the workload of cleaning backwash tank 220 and improves the user experience of integrated filter water outlet and backwash outlet device 100.

[0064] Optionally, the bottom wall 223 may be V-shaped. The side wall 224 may be inclined upward from the top edge of the bottom wall 223 and toward the water outlet trough 210. In this way, the water outlet trough 210 may be diamond-shaped. The upper portion of the guide plate 300 may be closely connected to the outer surface of the side wall 224. Preferably, the upper portion of the guide plate 300 may be integral with the side wall 224. For example, the top edge of the V-shaped bottom wall 223 may be connected to the middle portion of the guide plate 300, thereby forming the side wall 224 on the upper portion of the guide plate 300. The lower portion of the guide plate 300 may be enclosed with the bottom wall 223 to form an air collecting trough 440. Preferably, the air collecting trough 440 may be in an inverted V-shape. Since the integrated device 100 for filter effluent and backwash effluent is usually arranged in the filter 500, by setting a V-shaped gas collecting groove 440, the gas at the bottom of the integrated device 100 for filter effluent and backwash effluent can be guided out along the side walls of the V-shaped gas collecting groove 440 (i.e., the lower part of the guide plate 300 and the bottom wall 223). This can prevent the gas at the bottom of the integrated device 100 for filter effluent and backwash effluent from affecting the stability of the water passing through the guide plate 300, thereby ensuring that the integrated device 100 for filter effluent and backwash effluent has a better interception effect on the filter material.

[0065] Optionally, the gas collecting groove 440 may also be in other shapes, such as semicircular, rectangular, etc. However, the V-shaped gas collecting groove 440 has a better gas guiding effect, so the embodiment of the V-shaped gas collecting groove 440 is more preferred.

[0066] Furthermore, if Figure 1 As shown, the integrated device 100 for filter water outlet and backwash water outlet can extend along the longitudinal direction. The integrated device 100 for filter water outlet and backwash water outlet can also include an end sealing plate 450. The end sealing plate 450 can extend in a transverse direction perpendicular to the longitudinal direction. The ends in the longitudinal direction of the water outlet trough 210, the backwash trough 220, the guide plate 300, the primary air flow baffle 410 and the secondary air flow baffle 420 are all sealedly connected to the end sealing plate 450. The air collecting trough 440 can be connected to the outside of the end sealing plate 450. The bottom edge of the end sealing plate 450 can be provided with a groove adapted to the air collecting trough 440, thereby, the end sealing plate 450 does not block the air collecting trough 440. The top edge of the end sealing plate 450 can be higher than the water outlet trough 211. With this arrangement, the gas in the gas collecting tank 440 can be discharged to the outside of the integrated filter water outlet and backwash water outlet device 100 through the outer side surface of the end sealing plate 450. Due to the containment effect of the end sealing plate 450, the gas at the bottom of the integrated filter water outlet and backwash water outlet device 100 can be prevented from affecting the stability of the water passing through the guide plate 300, ensuring that the integrated filter water outlet and backwash water outlet device 100 has a better interception effect on the filter media.

[0067] Alternatively, as Figures 3A-3BAs shown, the integrated device 100 for filter water outlet and backwash water outlet can also include an exhaust pipe 460. One end of the exhaust pipe 460 can be connected to the gas collecting tank 440. The other end of the exhaust pipe 460 can extend to the side of the primary air flow baffle 410 away from the backwash tank 220. The number of exhaust pipes 460 can be arbitrary. By providing the exhaust pipe 460, the gas in the gas collecting tank 440 can be discharged to the outside of the primary air flow baffle 410 through the exhaust pipe 460. For example, the other end of the exhaust pipe 460 can extend above the water surface or be located below the water surface. When the other end of the exhaust pipe 460 is located below the water surface, the gas discharged from the exhaust pipe 460 can be discharged along the primary air flow baffle 410 to the outside of the integrated device 100 for filter water outlet and backwash water outlet, and this part of the gas will not enter the inner side of the primary air flow baffle 410 through the primary water flow opening 411. The provision of the exhaust pipe 460 can further prevent the gas at the bottom of the integrated filter outlet and backwash outlet device 100 from affecting the stability of the water passing through the guide plate 300, thereby ensuring that the integrated filter outlet and backwash outlet device 100 has a better interception effect on the filter material.

[0068] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front", "back", "up", "down", "left", "right", "horizontal", "vertical", "vertical", "horizontal", "top", "bottom", etc. are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0069] For ease of description, area-relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figures and other components or features. It should be understood that area-relative terms include not only the orientation of the components as described in the figures, but also different orientations in use or operation. For example, if the components in the drawings are inverted as a whole, the situation where the components are "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Thus, the exemplary term "above" may include both the orientations "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document is intended to include all of these situations.

[0070] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, parts, components and / or combinations thereof.

[0071] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0072] The present invention has been described through the above-described embodiments. However, it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments and that various variations and modifications may be made based on the teachings of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter water outlet and backwash water outlet integrated device, characterized in that: include: A water outlet trough, the water outlet trough having a water outlet trough opening opening upward and a water outlet provided on the trough wall; A backwash tank, the backwash tank having a backwash tank opening opening upward and a backwash water outlet provided on the tank wall, the water outlet tank being located above the backwash tank; a guide plate extending downward from the backwash slot and away from the center of the backwash slot; a primary air flow baffle, the primary air flow baffle being located on a side of the guide plate facing away from the backwash slot, the bottom edge of the primary air flow baffle being spaced apart from the guide plate to form a primary water flow opening, the primary air flow baffle extending upward from the bottom in a direction away from the center of the backwash slot, and the top edge of the primary air flow baffle being higher than the water outlet slot; as well as a secondary air flow baffle, the secondary air flow baffle being located between the guide plate and the primary air flow baffle, the bottom edge of the secondary air flow baffle being spaced apart from the guide plate to form a secondary water flow opening, the top edge of the secondary air flow baffle being higher than the water outlet slot, the secondary water flow opening being higher than the primary water flow opening, and the water outlet slot and the backwash slot being in communication with the primary water flow opening through the secondary water flow opening, The trough wall of the backwash trough includes side walls and a V-shaped bottom wall, the side walls are inclined upward from the top edge of the bottom wall and toward the water outlet trough, the upper part of the guide plate is closely connected to the outer surface of the side wall, and the lower part of the guide plate and the bottom wall are combined to form an air collecting trough, and the integrated water outlet and backwash water outlet device for the filter tank also includes an exhaust pipe, one end of the exhaust pipe is connected to the air collecting trough, and the other end extends to the side of the primary air flow baffle away from the water outlet trough.

2. The integrated filter water outlet and backwash water outlet device according to claim 1, characterized in that: A guide plate is connected to the bottom edge of the secondary air flow baffle, and the guide plate is located below the secondary air flow baffle and is spaced apart from the guide plate to form a drainage channel between the guide plate and the guide plate. The secondary water flow opening is located at the outlet of the drainage channel, and the guide plate is spaced apart from the primary air flow baffle.

3. The integrated filter water outlet and backwash water outlet device according to claim 2, characterized in that: The drainage channel has an increasing size from bottom to top.

4. The integrated filter water outlet and backwash water outlet device according to claim 2, characterized in that: The guide plate is inclined from bottom to top toward the backwash tank.

5. The integrated filter water outlet and backwash water outlet device according to claim 2, characterized in that: An included angle between the guide plate and the secondary air flow baffle is an obtuse angle.

6. The integrated filter water outlet and backwash water outlet device according to claim 2, characterized in that: The size of the primary water flow opening is the same as the size of the inlet of the drainage channel.

7. The integrated filter water outlet and backwash water outlet device according to claim 1, characterized in that: The secondary air flow baffle extends from bottom to top in a direction away from the center of the backwash tank.

8. The integrated filter water outlet and backwash water outlet device according to claim 7, characterized in that: An included angle between the primary air flow baffle and the horizontal direction is greater than an included angle between the secondary air flow baffle and the horizontal direction.

9. The integrated filter water outlet and backwash water outlet device according to claim 1, characterized in that: The wall of the backwash tank includes an inclined bottom wall, and the backwash water outlet is arranged on the lower part of the bottom wall.

10. The integrated filter water outlet and backwash water outlet device according to claim 1, characterized in that: The gas collecting tank is in an inverted V shape.

11. The integrated filter water outlet and backwash water outlet device according to claim 1, characterized in that: The integrated filter outlet and backwash outlet device extends along the longitudinal direction, and the integrated filter outlet and backwash outlet device also includes an end sealing plate, which extends in a transverse direction perpendicular to the longitudinal direction. The longitudinal ends of the water outlet trough, the backwash trough, the guide plate, the primary air flow baffle and the secondary air flow baffle are all sealedly connected to the end sealing plate, the air collecting trough is connected to the outside of the end sealing plate, and the top edge of the end sealing plate is higher than the water outlet trough.

12. The integrated filter water outlet and backwash water outlet device according to claim 1, characterized in that: The bottom of the water outlet trough is located in the backwash trough, and the water outlet trough opening is higher than the backwash trough opening.

13. The integrated filter water outlet and backwash water outlet device according to claim 1, characterized in that: In a cross section perpendicular to the extension direction of the integrated filter outlet and backwash outlet device, the integrated filter outlet and backwash outlet device has a symmetrical structure in the horizontal direction.

14. The integrated filter water outlet and backwash water outlet device according to claim 13, characterized in that: The number of the water outlet trough and the number of the backwash trough are both one.

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