A sewage treatment grille machine with backwashing function

Abstract

The utility model discloses a kind of grating machines with backwashing function for sewage treatment, including fuselage, motor, circulating conveyor belt, detachable grating and backwashing system, motor is equipped with on the outside of fuselage, inside is equipped with circulating conveyor belt, motor is connected and drives circulating conveyor belt to circulate in fuselage, a plurality of detachable gratings are equipped with on circulating conveyor belt, the part of front side of fuselage corresponding circulating conveyor belt is equipped with opening, the bottom of the upper section of fuselage is equipped with blow-off port, the nozzle of the backwashing system is equipped above blow-off port, nozzle is towards detachable grating.The utility model is driven by motor, and has detachable grating's circulating conveyor belt is set, and cooperate with the nozzle of backwashing towards grating, realize the automatic cleaning and quick maintenance replacement function of grating in operation process.Detachable grating design makes that when local damage, it can be quickly replaced without disassembling complete machine, greatly shorten maintenance time, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment technology, and in particular to a bar screen for sewage treatment with backwashing function. Background Technology

[0002] Among numerous wastewater treatment devices, the bar screen, as a core solid-liquid separation unit at the front end of the process, has the function of continuously and automatically intercepting and removing impurities from the fluid. It not only effectively protects the normal operation of downstream treatment equipment but also plays an irreplaceable screening role in urban wastewater treatment plants, the water supply industry, and power plant inlets. However, current bar screens have the following problems in use: Firstly, when treating wastewater containing fibrous or entangled impurities, the debris easily becomes stuck in the gaps of the screen and is difficult to remove automatically. As operating time increases, this trapped debris accumulates, reducing the effective flow area of ​​the screen and increasing water flow resistance. This not only affects wastewater treatment efficiency but also increases energy consumption. In severe cases, it can even cause complete blockage of the screen, requiring shutdown for manual cleaning. This maintenance method is not only time-consuming and labor-intensive but also interrupts the normal wastewater treatment process.

[0003] Secondly, most existing bar screens adopt an integral or fixed bar structure. When a local bar needs to be replaced due to wear, corrosion or mechanical damage, the entire bar assembly often needs to be disassembled, resulting in long equipment maintenance cycles and high costs. This problem is particularly prominent when treating corrosive wastewater, where the bar replacement frequency is high.

[0004] Therefore, there is an urgent need to develop a bar screen machine that combines effective anti-clogging and convenient maintenance functions, capable of self-cleaning and quick replacement of the bar screen, thereby improving the reliability and economy of equipment operation. Utility Model Content

[0005] In view of the shortcomings of the prior art, the present invention provides a bar screen for sewage treatment with backwashing function to solve at least one of the above-mentioned technical problems.

[0006] This utility model provides the following technical solution: This utility model provides a wastewater treatment bar screen with backwashing function, including a machine body, a motor, a circulating conveyor belt, detachable bar screens, and a backwashing system. The motor is located on the outer side of the machine body, and the circulating conveyor belt is located on the inner side. The motor is connected to and drives the circulating conveyor belt to circulate within the machine body. Several detachable bar screens are spaced apart on the circulating conveyor belt. An opening is provided on the front side of the machine body corresponding to the circulating conveyor belt. A sewage outlet is provided at the bottom of the upper section of the machine body. A nozzle of the backwashing system is provided above the sewage outlet, and the nozzle faces the detachable bar screens.

[0007] In one embodiment, the detachable grid is mounted on the circulating conveyor belt via a detachable structure, the detachable structure including a sliding block mechanism disposed on the detachable grid and a limiting groove disposed on the circulating conveyor belt, the sliding block mechanism being slidably embedded in the limiting groove.

[0008] In one embodiment, the sliding block mechanism includes a first slider, a second slider, and an adjusting member, the adjusting member being used to drive the first slider and / or the second slider to move, causing relative movement between them, so that the sliding block mechanism engages or disengages from the limiting groove.

[0009] In one embodiment, the adjusting member is a threaded rod, which is rotatably connected to the body of the detachable grid. The threaded rod is threadedly connected to the first slider and / or the second slider, and rotating the threaded rod can drive the first slider and / or the second slider to move linearly.

[0010] In one embodiment, the threaded rod is provided with a first thread and a second thread, the first thread being connected to the first slider and the second thread being connected to the second slider, the first thread and the second thread having opposite directions of rotation.

[0011] In one embodiment, the limiting groove is an inverted T-shaped groove that extends laterally through the surface of the circulating conveyor belt.

[0012] In one embodiment, the backwashing system further includes a water pump, the water pump's inlet end being connected to a water tank via a first water pipe, and the water pump's outlet end being connected to the nozzle via a second water pipe, wherein multiple nozzles are provided along the width direction of the circulating conveyor belt.

[0013] In one embodiment, the water tank is located on the top of the machine body, and a filter screen is provided at the inlet of the first water pipe.

[0014] In one embodiment, an insertion groove is provided on the side wall of the machine body, and the second water pipe passes through the insertion groove to enter the interior of the machine body. A sealing ring is provided between the insertion groove and the second water pipe.

[0015] In one embodiment, the top of the detachable grid is provided with a bend, the bend of which is directed toward the direction of movement of the circulating conveyor belt.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention achieves automatic cleaning and rapid maintenance / replacement of the screen during operation by incorporating a motor-driven circulating conveyor belt with a detachable screen and backwash nozzles facing the screen. This structure effectively solves the clogging problem caused by entangled fibers and other impurities trapped in the screen gaps. The backwash system promptly removes stuck contaminants, ensuring the effective flow area of ​​the screen and maximizing equipment operating efficiency while reducing energy consumption. Furthermore, the detachable screen design allows for quick replacement without disassembling the entire machine in case of partial damage, significantly shortening maintenance time and reducing costs. It is particularly suitable for treating corrosive wastewater, thereby significantly improving the reliability and economy of the equipment. Attached Figure Description

[0017] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0018] Figure 1 An outline drawing of a wastewater treatment bar screen with backwashing function provided by this utility model; Figure 2 A schematic diagram of the structure of a wastewater treatment bar screen with backwashing function provided by this utility model; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 for Figure 2 A magnified view of a section at point B in the middle; Figure 5 A top view of a bar screen for sewage treatment with backwashing function provided by this utility model.

[0019] Figure label: 1. Machine body; 101. Insertion slot; 2. Motor; 3. Circulating conveyor belt; 301. Limiting slot; 4. Detachable grille; 401. First slider; 402. Second slider; 403. First thread; 404. Second thread; 5. Backwashing system; 501. Water tank; 502. Filter screen; 503. First water pipe; 504. Water pump; 505. Second water pipe; 506. Nozzle; 507. Sealing ring. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0021] In the description of this application, it should be understood that if 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. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must be equipped with a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0022] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 a joint; 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0025] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0026] The following will be combined with the appendix Figures 1 to 5 The present invention will be further described below.

[0027] This utility model provides a wastewater treatment bar screen with backwashing function, including a body 1, a motor 2, a circulating conveyor belt 3, detachable bar screens 4, and a backwashing system 5. The body 1 serves as the main support structure, with the motor 2 mounted on its outer side and a circulating conveyor belt 3 driven by the motor 2 and capable of cyclical movement on its inner side. Multiple detachable bar screens 4 are installed at intervals along the length of the circulating conveyor belt 3, forming the main filtration unit. An opening is provided on the front side of the body 1, corresponding to the working area of ​​the circulating conveyor belt 3, to allow wastewater to flow in and contact the detachable bar screens 4, facilitating disassembly and assembly of the detachable bar screens 4 for later maintenance. A drain outlet is provided at the bottom of the upper section of the body 1 for discharging the removed waste. Above the drain outlet, a nozzle 506 of the backwashing system 5 is installed. The nozzle 506 sprays directly at the removable screen 4 that moves to this position with the circulating conveyor belt 3, so as to perform high-pressure washing. At this time, the removable screen 4 faces downward, and the dirt falls under its own weight and is discharged through the drain outlet. Backwashing at this time is more conducive to removing dirt from the removable screen 4.

[0028] This invention achieves continuous automatic cleaning and rapid maintenance / replacement of the bar screen during operation by setting up a circulating conveyor belt 3 driven by a motor 2 and equipped with detachable screens 4, along with backwash nozzles along the screen's circulation path facing the detachable screens 4. This structure effectively solves the clogging problem caused by fibrous and entangled impurities trapped in the screen gaps. The backwash system 5 uses high-pressure water flow to promptly flush away stuck contaminants from the screen, ensuring a continuously effective flow area and stable operating efficiency while reducing additional energy consumption caused by clogging. Furthermore, the detachable screen design allows for targeted and rapid replacement of worn or damaged screen sections without disassembling the entire conveyor belt or screen assembly. This significantly shortens equipment downtime, reduces maintenance costs and labor intensity, and is particularly suitable for treating complex and corrosive wastewater. Therefore, it significantly improves the reliability, continuity, and overall economy of the bar screen operation from both anti-clogging and maintenance perspectives.

[0029] In some implementations, such as Figure 3 As shown, the detachable screen 4 is installed on the circulating conveyor belt 3 via a detachable structure. The detachable structure includes a sliding block mechanism on the detachable screen 4 and a limiting groove 301 on the circulating conveyor belt 3. The sliding block mechanism is slidably embedded into the limiting groove 301. During installation, the sliding block mechanism on the detachable screen 4 is precisely aligned from the side of the circulating conveyor belt 3 and slid into the limiting groove 301, achieving quick and stable assembly. This slot-type connection method not only ensures that the detachable screen 4 can withstand the impact of water flow and remain stable when filtering sewage, but more importantly, when a single detachable screen 4 needs to be replaced or repaired, it can simply be slid out along the limiting groove 301 in the opposite direction, achieving true partial quick disassembly and assembly without the need for overall replacement. To facilitate the disassembly and assembly of the detachable screen 4, a specific position on the machine body 1 can be designated as the disassembly / assembly position, and a disassembly / assembly opening can be provided on the corresponding side plate. After rotating the detachable screen 4 to this disassembly / assembly position, the detachable screen 4 can be disassembled or assembled through the disassembly / assembly opening.

[0030] In some embodiments, to facilitate the assembly and disassembly of the detachable grid 4, the sliding block mechanism can be configured as a deformable structure, allowing the bottom of the sliding block mechanism to extend and retract laterally. After inserting the sliding block mechanism into the limiting groove 301, the sliding block mechanism is then extended laterally. This eliminates the need for sliding assembly and disassembly from the side of the circulating conveyor belt 3, making the assembly and disassembly of the detachable grid 4 more convenient. For example, as... Figure 3 As shown, the sliding block mechanism includes a first slider 401, a second slider 402, and an adjusting member. The adjusting member is used to drive the first slider 401 and / or the second slider 402 to move, so that the two move relative to each other, so that the sliding block mechanism engages or disengages from the limiting groove 301.

[0031] This invention achieves direct insertion, removal, and locking of the detachable screen 4 on the front of the circulating conveyor belt 3 by designing the sliding block mechanism as a deformable structure and supplementing it with an adjusting component to control the lateral extension and retraction of the slider. This innovative design completely eliminates the dependence on the lateral operating space of the equipment, allowing the installation and removal of the detachable screen 4 to be carried out without considering the layout restrictions around the conveyor belt, greatly improving the convenience and flexibility of maintenance operations. Operators only need to use the adjusting component on the front of the equipment to tighten or loosen the screen, significantly simplifying the operation steps and reducing the technical requirements for maintenance personnel. This forward locking mechanism also ensures the connection stability of the detachable screen 4 in the working state, effectively preventing loosening caused by water flow impact.

[0032] Specifically, the adjusting component is a threaded rod, which is rotatably connected to the body of the detachable grid 4. The threaded rod is threadedly connected to the first slider 401 and / or the second slider 402. Rotating the threaded rod can drive the first slider 401 and / or the second slider 402 to move linearly. The threaded rod is provided with a first thread 403 and a second thread 404. The first thread 403 is connected to the first slider 401, and the second thread 404 is connected to the second slider 402. The first thread 403 and the second thread 404 have opposite directions of rotation. When the threaded rod is rotated by a tool or manually, the principle of positive and negative threads can be used to simultaneously drive the first slider 401 and the second slider 402 to move linearly in opposite directions, thereby realizing the lateral expansion (tightly engaging with the limiting groove 301) or contraction (separating from the limiting groove 301) of the sliding block mechanism. The limiting groove 301 is an inverted T-shaped groove that is laterally through-type on the surface of the circulating conveyor belt 3.

[0033] This invention creatively constructs a highly efficient and reliable locking system for the detachable grille 4 by employing a threaded rod with bidirectional threads and an inverted T-shaped limiting groove 301 in synergistic design. This structure utilizes a simple rotational motion to achieve synchronous reverse movement of the slider, which is not only easy to operate and saves time and effort, but also ensures the absolute stability of the detachable grille 4 in the working state, effectively resisting water flow impact. The inverted T-shaped groove design provides ample guiding space for the slider's extension and retraction, and also forms a reliable anti-detachment structure, enhancing the safety of the connection.

[0034] In some implementations, such as Figure 2 and Figure 4 As shown, the backwashing system 5 also includes a water pump 504. The inlet of the water pump 504 is connected to a water tank 501 via a first water pipe 503, and the outlet of the water pump 504 is connected to a nozzle 506 via a second water pipe 505. Multiple nozzles 506 are provided along the width of the circulating conveyor belt 3. This design allows multiple nozzles 506 to spray simultaneously when the detachable screen 4 reaches the rinsing station, forming a rinsing water curtain covering the entire width of the detachable screen 4, ensuring no dead corners in cleaning and significantly improving the dirt removal rate.

[0035] In some implementations, such as Figure 2 , Figure 4 and Figure 5 As shown, the water tank 501 is located on the top of the machine body 1. This layout not only makes full use of the unused space at the top of the equipment, but also gives the water tank 501 a potential energy advantage. A filter screen 502 is provided at the inlet of the first water pipe 503. This filter screen 502 can pre-filter the water source that is about to enter the backwashing system 5, effectively intercepting suspended particles and other possible impurities in the water, and improving the service life of the water pump 504.

[0036] In some implementations, such as Figure 4As shown, an insertion slot 101 is provided on the side wall of the machine body 1. The second water pipe 505 passes through the insertion slot 101 and enters the interior of the machine body 1. A sealing ring 507 is provided between the insertion slot 101 and the second water pipe 505. The sealing ring 507 is used to maintain a seal and prevent sewage from flowing out from the insertion slot 101.

[0037] In some implementations, such as Figure 2 and Figure 4 As shown, the top of the detachable grid 4 is provided with a bend, and the bending direction of the bend is towards the direction of movement of the circulating conveyor belt 3. By providing the bend, it is possible to prevent dirt from being thrown out under the action of centrifugal force when the circulating conveyor belt 3 turns.

[0038] In summary, this invention, by incorporating a circulating conveyor belt 3 driven by a motor 2 and equipped with a detachable screen 4, along with backwash nozzles 506 directed towards the screen, achieves automatic cleaning and rapid maintenance / replacement of the screen during operation. This structure effectively solves the clogging problem caused by entangled impurities such as fibers remaining in the screen gaps. The backwash system 5 promptly flushes away the stuck contaminants, ensuring the effective flow area of ​​the screen and the equipment's operating efficiency while reducing energy consumption. Furthermore, the detachable screen design allows for quick replacement without disassembling the entire machine in case of partial damage, significantly shortening maintenance time and reducing costs. It is particularly suitable for treating corrosive wastewater, thereby significantly improving the reliability and economy of the equipment.

[0039] Components and principles not described in detail in this utility model can be implemented using various structures and principles known in the prior art.

[0040] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A bar screen for sewage treatment with backwashing function, characterized in that, The device includes a body, a motor, a circulating conveyor belt, detachable grilles, and a backwashing system. The motor is located on the outer side of the body, and the circulating conveyor belt is located on the inner side. The motor is connected to and drives the circulating conveyor belt to circulate within the body. Several detachable grilles are spaced apart on the circulating conveyor belt. An opening is provided on the front side of the body corresponding to the circulating conveyor belt. A drain port is provided at the bottom of the upper section of the body. A nozzle of the backwashing system is provided above the drain port, and the nozzle faces the detachable grilles.

2. The wastewater treatment bar screen with backwashing function according to claim 1, characterized in that, The detachable grid is mounted on the circulating conveyor belt via a detachable structure. The detachable structure includes a sliding block mechanism disposed on the detachable grid and a limiting groove disposed on the circulating conveyor belt. The sliding block mechanism is slidably embedded in the limiting groove.

3. The wastewater treatment bar screen with backwashing function according to claim 2, characterized in that, The sliding block mechanism includes a first slider, a second slider, and an adjusting member. The adjusting member is used to drive the first slider and / or the second slider to move, so that the two move relative to each other, so that the sliding block mechanism engages or disengages from the limiting groove.

4. The wastewater treatment bar screen with backwashing function according to claim 3, characterized in that, The adjusting component is a threaded rod, which is rotatably connected to the body of the detachable grid. The threaded rod is threadedly connected to the first slider and / or the second slider. Rotating the threaded rod can drive the first slider and / or the second slider to move linearly.

5. The wastewater treatment bar screen with backwashing function according to claim 4, characterized in that, The threaded rod is provided with a first thread and a second thread. The first thread is connected to the first slider, and the second thread is connected to the second slider. The first thread and the second thread have opposite directions of rotation.

6. The wastewater treatment bar screen with backwashing function according to claim 2, characterized in that, The limiting groove is an inverted T-shaped groove that runs horizontally through the surface of the circulating conveyor belt.

7. The wastewater treatment bar screen with backwashing function according to claim 1, characterized in that, The backwashing system also includes a water pump, the water inlet of which is connected to a water tank via a first water pipe, and the water outlet of which is connected to a nozzle via a second water pipe. Multiple nozzles are provided along the width of the circulating conveyor belt.

8. The wastewater treatment bar screen with backwashing function according to claim 7, characterized in that, The water tank is located on the top of the machine body, and a filter screen is provided at the inlet of the first water pipe.

9. The wastewater treatment bar screen with backwashing function according to claim 8, characterized in that, An insertion groove is provided on the side wall of the machine body, and the second water pipe passes through the insertion groove to enter the interior of the machine body. A sealing ring is provided between the insertion groove and the second water pipe.

10. A wastewater treatment bar screen with backwashing function according to any one of claims 1-9, characterized in that, The top of the detachable grid is provided with a bend, and the bending direction of the bend is toward the movement direction of the circulating conveyor belt.

Images