Backwash apparatus and grid arrangement

Abstract

This utility model relates to the field of water treatment equipment technology, and in particular to a backwashing device and a bar screen assembly. The backwashing device includes: a liquid level detection unit, an electric valve, and a flushing unit. The liquid level detection unit is used to detect the liquid level difference between the inside and outside of the bar screen; the flushing unit includes: a flushing pipe and nozzles; the flushing pipe is connected to the electric valve and extends to the outside of the bar screen; the nozzles are located on the flushing pipe and face the bar screen. This utility model uses the liquid level detection unit to detect the liquid level difference between the inside and outside of the bar screen. Based on the liquid level difference control strategy, it can accurately determine the bar screen blockage status, thereby promptly initiating backwashing operations; high-pressure backwashing is achieved through a water pump and an electric valve, the backwashing water source is delivered through the flushing pipe, and the bar screen is backwashed through the nozzles. It features high bar screen flushing efficiency, a wide flushing range, avoids the safety risks of manual operation in the pool, and eliminates safety hazards such as oxygen deficiency and poisoning from harmful gases in confined spaces.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment technology, and in particular to a backwashing device and a bar screen. Background Technology

[0002] The artificial screen in the forebay of the water intake pumping station is a key component ensuring the normal operation of the water intake system. The artificial screen is mainly used to intercept impurities such as aquatic plants and suspended solids in the water, preventing these impurities from entering the water intake pump, thus protecting the pump's normal operation and ensuring the quality and efficiency of the water intake. However, during operation, the screen is easily clogged by silt, aquatic plants, and other substances, leading to increased water flow resistance, decreased water intake efficiency, and ultimately threatening the stable operation of the entire water intake system.

[0003] The current method for dealing with blockages in the manual screens of the intake pumping station's forebay requires manually emptying the pool to remove the blockage, which has the following drawbacks: 1. Operational interruption and reduced operational efficiency: Draining the water tank requires stopping water intake operations, resulting in a continuous interruption of water supply. Furthermore, clearing blockages takes a long time, affecting the overall operational efficiency of the water plant.

[0004] 2. Significant safety risks: Working in confined spaces poses risks such as oxygen deficiency and poisoning from harmful gases, threatening the lives of operators.

[0005] 3. High energy consumption and cost: Frequent manual unclogging requires a lot of manpower, and failure to flush in time will lead to an increase in water consumption per unit. According to statistics, each flush can reduce water consumption per unit by 3%-5%.

[0006] 4. Waste of water resources: Traditional flushing methods require additional water. Utility Model Content

[0007] This utility model provides a backwashing device and a bar screen to solve the problems of reduced operating efficiency, safety hazards, high labor costs, and water waste caused by manually cleaning bar screen blockages in the prior art.

[0008] This utility model provides a backwashing device, comprising: The liquid level detection unit is used to detect the liquid level difference between the inner and outer sides of the grid; An electric valve is connected to the main outlet pipe of the water intake pump; The rinsing unit includes: A flushing pipe, connected to the electric valve, extends to the outside of the grille; The nozzle is located on the flushing pipe and is oriented toward the grid.

[0009] According to the backwashing device provided by this utility model, the flushing pipe includes: The main pipe is connected to the main outlet pipe of the water intake pump, and an electric valve is installed in the middle. Multiple branch pipes are connected to the main pipe, and the multiple branch pipes are arranged along the height direction of the grid. Each branch pipe is located on the crossbeam of the grid and extends horizontally.

[0010] According to the backwashing device provided by this utility model, multiple nozzles are arranged along the extension direction of the branch pipe.

[0011] According to the backwashing device provided by this utility model, the flushing unit further includes: Multiple supports are provided along the extension direction of the branch pipe, and each support has one water inlet and at least two water outlets, and the water inlet is connected to the water outlet and the branch pipe, and the nozzle is provided on the water outlet.

[0012] According to the backwashing device provided by this utility model, two water outlets are provided, and the two water outlets are respectively located at the upper end and lower end of the water inlet in the height direction.

[0013] According to the backwashing device provided by this utility model, the nozzle is rotatably disposed at the water outlet.

[0014] According to the backwashing device provided by this utility model, the flushing unit further includes: A pressure sensor is located between the bracket and the nozzle.

[0015] According to the backwashing device provided by this utility model, the liquid level detection unit includes: The first ultrasonic level gauge is located inside the grid. The second ultrasonic level gauge is located on the outside of the grid.

[0016] The backwashing device provided by this utility model also includes: The controller is electrically connected to the liquid level detection unit and the electric valve, respectively, and is used to control the opening and closing state of the electric valve according to the liquid level difference.

[0017] This utility model also provides a bar screen device, including: the backwashing device described above.

[0018] This utility model provides a backwashing device, comprising: a liquid level detection unit, an electric valve, and a flushing unit. The liquid level detection unit is used to detect the liquid level difference between the inside and outside of the screen; the flushing unit includes: a flushing pipe and a nozzle; the flushing pipe is connected to the electric valve and extends to the outside of the screen; the nozzle is located on the flushing pipe and faces the screen. This utility model provides a backwashing device that, through the liquid level detection unit detecting the liquid level difference between the inside and outside of the screen, and based on a control strategy according to the liquid level difference, can accurately determine the screen blockage status, thereby promptly initiating backwashing operations; high-pressure backwashing is achieved through a water pump and an electric valve, backwashing water is delivered through the flushing pipe, and the screen is backwashed through the nozzles. It features high screen flushing efficiency, a wide flushing range, avoids the safety risks of manual operation in the pool, and eliminates safety hazards such as oxygen deficiency and poisoning from harmful gases in confined spaces.

[0019] Furthermore, the bar screen device provided by this utility model has the same advantages as described above because it includes the backwashing device in the above embodiments of this utility model. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the backwashing device provided in one embodiment of the present invention.

[0022] Figure 2 This is a partial structural diagram of the branch pipe, support, and nozzle provided in one embodiment of the present invention.

[0023] Figure label: 11: First ultrasonic level gauge; 12: Second ultrasonic level gauge; 2: Electric valve; 31: Main pipe; 32: Branch pipe; 33: Support; 34: Nozzle; 4: Grille. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and are not intended to 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 this embodiment.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this embodiment, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this embodiment, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0028] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] The following is combined Figure 1 and Figure 2 This invention describes a backwashing device. The backwashing device includes: a liquid level detection unit, a water intake pump, an electric valve 2, and a flushing unit.

[0030] The liquid level detection unit is used to detect the liquid level difference between the inner and outer sides of the grid 4; the electric valve 2 is connected to the main outlet pipe of the water pump; the flushing unit includes: a flushing pipe and a nozzle 34; the flushing pipe is connected to the electric valve 2 and extends to the outside of the grid 4; the nozzle 34 is located on the flushing pipe and faces the grid 4.

[0031] Specifically, in this utility model, the water flow direction on both sides of the grille 4 is specified as flowing from the inside of the grille 4 to the outside, and the grille 4 intercepts impurities such as aquatic plants and suspended solids in the water; therefore, the backwashing direction is from the outside of the grille 4 to the inside, washing away the mud, sand, aquatic plants and other clogging substances intercepted on the grille 4, thereby reducing water flow resistance, improving water intake efficiency, and ensuring the stability of the entire water intake system.

[0032] The water pump provides the driving force for backwashing. One end of the pump is connected to the water source inside the grille 4, and the other end is connected to the flushing pipe via the electric valve 2. Using the water source inside the grille 4 as the backwashing water source facilitates local water intake and eliminates the need for an additional water source. The water pump and electric valve 2 pressurize the backwashing water source, achieving a pressure of 160 kPa for the water entering the flushing pipe. Utilizing high-pressure water as the backwashing water source enhances the backwashing effect. It is understood that the water pressure provided by the pump and electric valve 2 can be set according to the actual operating environment.

[0033] The liquid level detection unit can detect the liquid level difference between the inner and outer sides of the screen 4. This difference allows for assessment of the screen 4's blockage status, thus determining whether backwashing is necessary. This assessment can be performed manually or automatically by the controller. An electric valve 2 is installed at the water intake pump location, controlling the backwashing status through its opening. Specifically: 1. When manual judgment is used, the liquid level difference detected by the liquid level detection unit is observed manually to determine whether backwashing of the screen 4 is necessary. The liquid level difference threshold is preset based on experience. When the detected liquid level difference is greater than the liquid level difference threshold, the electric valve 2 is manually activated to release water and perform backwashing operation of the screen 4.

[0034] 2. When the controller automatically determines the level, it is electrically connected to the liquid level detection unit and electric valve 2. The controller acquires the liquid level difference collected by the liquid level detection unit. A liquid level difference threshold is preset in the controller. When the acquired liquid level difference is greater than the threshold, the controller activates electric valve 2 to perform backwashing of the grille 4. During backwashing, the liquid level detection unit monitors the liquid level difference in real time. When the detected liquid level difference is less than or equal to the liquid level difference threshold, the controller closes electric valve 2. The above controller can be a PLC.

[0035] It is understandable that when the detected liquid level difference is greater than the liquid level difference threshold, it means that the water flow resistance of the screen 4 is large, the water intake efficiency is low, and there is a blockage on the screen 4, requiring backwashing. Conversely, when the detected liquid level difference is less than or equal to the liquid level difference threshold, it means that the screen 4 is performing well and does not require backwashing. In this utility model, the liquid level difference threshold for opening the electric valve is specified as 10cm, and the liquid level difference threshold for closing the electric valve 2 is 2cm. Of course, the corresponding liquid level difference threshold can be set according to the actual screen 4 specifications and the current water environment.

[0036] The flushing unit includes at least a flushing pipe and a nozzle 34. The flushing pipe is connected between the nozzle 34 and the electric valve 2, and is used to deliver backwash water to a designated position on the screen 4. The nozzle 34 faces outwards from the screen 4. The backwash water sprayed from the nozzle 34 backwashes the screen 4, dislodging blockages and discharging them into the forepool with the water flow, thus realizing the resource utilization of wastewater. Furthermore, the backwashing equipment of this invention does not require emptying the water tank during backwashing, and water intake can continue.

[0037] This utility model provides a backwashing device, comprising: a liquid level detection unit, an electric valve 2, and a flushing unit. The liquid level detection unit is used to detect the liquid level difference between the inner and outer sides of the screen 4; the flushing unit includes: a flushing pipe and a nozzle 34; the flushing pipe is connected to the electric valve and extends to the outer side of the screen 4; the nozzle 34 is disposed on the flushing pipe and faces the screen 4. This utility model provides a backwashing device that, through the liquid level detection unit detecting the liquid level difference between the inner and outer sides of the screen 4, and based on a control strategy according to the liquid level difference, can accurately determine the blockage status of the screen 4, thereby promptly initiating backwashing operations; high-pressure backwashing is achieved through a water pump and the electric valve 2, and backwashing water is delivered through the flushing pipe and backwashed through the nozzle 34. It features high screen 4 flushing efficiency, a wide flushing range, avoids the safety risks of manual operation in the pool, and eliminates safety hazards such as oxygen deficiency and poisoning from harmful gases in confined spaces.

[0038] In one embodiment of this utility model, the flushing pipe includes a main pipe 31 and multiple branch pipes 32. The main pipe 31 is connected to the main outlet pipe of the water intake pump and the water output is controlled by an electric valve 2. The multiple branch pipes 32 are respectively connected to the main pipe 31, and the multiple branch pipes 32 are arranged along the height direction of the grille 4. Each branch pipe 32 is located on the crossbeam of the grille 4 and extends horizontally. In this embodiment, the flushing pipe is composed of the main pipe 31 and multiple branch pipes 32. The main pipe 31 has a large inner diameter and is used to transport the water source from the water intake pump to each branch pipe 32. The branch pipes 32 are fixed on the crossbeam of the grille 4, and are arranged sequentially along the height direction of the grille 4 to form a multi-layer branch pipe structure, thereby making the backwashing range uniformly and comprehensively cover the area where the grille 4 is located.

[0039] In one embodiment of this utility model, multiple nozzles 34 are arranged along the extension direction of the branch pipe 32. In this embodiment, through the arrangement of the flushing pipe and nozzles 34, the backwash water source can cover the area in both the horizontal and vertical directions of the grille 4, thereby improving the backwashing effect.

[0040] In one embodiment of this utility model, the flushing unit further includes: a bracket 33, of which multiple brackets are arranged along the extension direction of the branch pipe 32, and each bracket 33 has one water inlet and at least two water outlets, wherein the water inlet and the water outlet are connected, the water inlet is connected to the branch pipe 32, and a nozzle 34 is disposed on the water outlet. Specifically, the bracket 33 has a pipeline inside, which connects the water inlet to each water outlet, the water inlet is connected to the end of the branch pipe 32, and each water outlet is provided with a nozzle 34. By installing the nozzles 34 through the bracket 33, multi-position backwashing can be realized.

[0041] In one embodiment of this utility model, two water outlets are provided, and the two water outlets are located at the upper and lower ends of the water inlet in the height direction, respectively. In this embodiment, the upper and lower grilles 4 can be backwashed by the bracket 33, which can increase the spacing between the branch pipes 32 in the height direction.

[0042] In one embodiment of this utility model, the nozzle 34 is rotatably disposed at the water outlet. Preferably, a spherical sleeve can be provided at the end of the water outlet, and the outer contour of the nozzle 34 also adopts a spherical structure. The nozzle 34 is rotatably installed in the spherical sleeve, thereby realizing the rotation of the nozzle 34 and increasing the backwashing range.

[0043] In one embodiment of this utility model, the flushing unit further includes a pressure sensor, which is disposed between the bracket 33 and the nozzle 34. The pressure sensor monitors the backwash jet pressure, provides real-time feedback on the flushing pressure, and dynamically adjusts the opening of the electric valve through the PLC to ensure stable flushing effect.

[0044] In one embodiment of this utility model, the liquid level detection unit includes: a first ultrasonic level gauge 11 and a second ultrasonic level gauge 12. The first ultrasonic level gauge 11 is disposed on the inner side of the grille 4; the second ultrasonic level gauge 12 is disposed on the outer side of the grille 4. By using the ultrasonic level gauges disposed on the inner and outer sides of the grille 4, the liquid level difference between the inner and outer sides of the grille 4 can be detected.

[0045] In one embodiment of this utility model, the backwashing device further includes a controller, which is electrically connected to the liquid level detection unit and the electric valve 2, respectively, and is used to control the opening and closing state of the electric valve 2 according to the liquid level difference. The controller may be a PLC.

[0046] This utility model also provides a bar screen device. The bar screen device includes the backwashing equipment described in the above embodiments of this utility model.

[0047] Specifically, the aforementioned bar screen device is installed in the forebay of the water intake pumping station.

[0048] The bar screen device provided by this utility model has the same advantages as described above because it includes the backwashing device in the above embodiments of this utility model.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A backwashing device, characterized in that, include: The liquid level detection unit is used to detect the liquid level difference between the inner and outer sides of the grid (4); Electric valve (2) is connected to the main outlet pipe of the water intake pump; The rinsing unit includes: A flushing pipe is connected to the electric valve (2) and extends to the outside of the grille (4); The nozzle (34) is located on the flushing pipe and is positioned toward the grid (4).

2. The backwashing device according to claim 1, characterized in that, The flushing tube includes: The main pipe (31) is connected to the main outlet pipe of the water intake pump; Multiple branch pipes (32) are connected to the main pipe (31) respectively, and the multiple branch pipes (32) are arranged along the height direction of the grid (4). Each branch pipe (32) is located on the crossbeam of the grid (4) and extends in the horizontal direction.

3. The backwashing device according to claim 2, characterized in that, Multiple nozzles (34) are provided along the extension direction of the branch pipe (32).

4. The backwashing device according to claim 2, characterized in that, The rinsing unit further includes: A bracket (33) is provided in multiple ways along the extension direction of the branch pipe (32), and each bracket (33) has a water inlet and at least two water outlets, and the water inlet is connected to the water outlet and the water inlet is connected to the branch pipe (32), and the nozzle (34) is provided on the water outlet.

5. The backwashing device according to claim 4, characterized in that, Two water outlets are provided, and the two water outlets are respectively located at the upper and lower ends of the water inlet in the height direction.

6. The backwashing device according to claim 4, characterized in that, The nozzle (34) is rotatably disposed at the water outlet.

7. The backwashing device according to claim 4, characterized in that, The rinsing unit further includes: A pressure sensor is located between the bracket (33) and the nozzle (34).

8. The backwashing device according to claim 1, characterized in that, The liquid level detection unit includes: The first ultrasonic level gauge (11) is located inside the grid (4); The second ultrasonic level gauge (12) is located on the outside of the grid (4).

9. The backwashing device according to any one of claims 1 to 8, characterized in that, Also includes: The controller is electrically connected to the liquid level detection unit and the electric valve (2) respectively, and is used to control the opening and closing state of the electric valve (2) according to the liquid level difference.

10. A grid device, characterized in that, include: The backwashing device according to any one of claims 1 to 9.

Images