Grillage machine and water pump grid linkage system

Abstract

The utility model relates to the technical field of drainage systems, in particular to a grillage machine and a water pump grillage linkage system. The utility model provides a grillage machine and water pump grillage linkage system. The grillage machine and water pump grillage linkage system comprises a grillage machine frame and grillages arranged on the grillage machine frame. A flushing mechanism is arranged on the grille rack and comprises a water inlet pipe, a water storage tank communicated with the water inlet pipe and a spray head, the water storage tank is connected with the spray head through a connecting pipe, and the connecting pipe extends out of the water storage tank from the side wall of the water storage tank; a water inlet hole is formed in the part, in the water storage tank, of the connecting pipe; the grillage machine controls a switch of the grillage machine through an intermediate relay, the intermediate relay controls start and stop through a PLC, the water pump is provided with a switch, and the switch is connected with the PLC; after the water pump switch is turned on, the PLC controls the intermediate relay to be started in a delayed mode. The technical problem that in the prior art, sewage conveying of a pump station is not smooth is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of drainage systems, and in particular to a bar screen machine and a water pump bar screen linkage system. Background Technology

[0002] The drainage company is primarily responsible for collecting and transporting industrial wastewater and domestic sewage, as well as the construction, operation, management, and fee collection of the sewage interception network system. With the advancement of smart water management, more pump station data, including data from villages, residential areas, and terminals, will soon be connected to the central control system. The central control room will analyze data such as liquid level, flow rate, power consumption, and alarms uploaded from the pump station PLC cabinets using host computer software, and will then rationally schedule the pump stations to ensure the safe, efficient, and economical operation of the sewage system.

[0003] During the operation of pumping stations, a large amount of garbage often clogs the area in front of the screen, leading to several recurring issues.

[0004] 1. Sewage cannot pass smoothly through the bar screen, resulting in a low liquid level in the pump pool. The pump pool often operates at a low liquid level and cannot lower the overall liquid level.

[0005] 2. Large liquid level differences can easily lead to incorrect judgments by the central control dispatcher, affecting sewage dispatching.

[0006] 3. Long-term operation at low liquid levels can easily cause the water pump motor to burn out and a large amount of small debris to pass directly through the bar screen, causing the water pump to become clogged. This adds a lot of complicated work for maintenance personnel and inspectors to constantly clean up the clogged debris.

[0007] 4. A large amount of garbage accumulates in the bar screen, which can cause the bar screen to be overloaded during occasional use, making the bar screen motor prone to burnout and the bar screen to deform.

[0008] A problem exists in the daily operation of pumping stations: the pumps and screens cannot be started simultaneously. After the pumps start, on-site inspectors often need to manually open the screens and monitor their operation. This manual operation significantly increases the workload of the inspectors. To ensure the smooth transport of sewage from the pumping station, the screen machine is needed to separate large amounts of waste from the sewage tank.

[0009] Based on the above issues, the bar screen needs to be cleaned frequently during use to prevent the bar screen from being blocked. At the same time, a water pump-bar screen linkage system needs to be set up to ensure the smooth transportation of sewage from the pumping station. Utility Model Content

[0010] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a bar screen and water pump bar screen linkage system, which aims to solve the technical problem of unsmooth sewage transportation in the prior art.

[0011] To achieve the above objectives, this utility model proposes a bar screen machine, including a bar screen frame and a bar screen mounted on the bar screen frame; a rinsing mechanism is provided on the bar screen frame, the rinsing mechanism including a water inlet pipe, a water storage tank communicating with the water inlet pipe and a spray head, the water storage tank and the spray head being connected by a connecting pipe, the connecting pipe extending out of the water storage tank from the side wall of the water storage tank, and the portion of the connecting pipe inside the water storage tank having a water inlet hole.

[0012] Preferably, the spray head is provided with a water storage chamber and a spray hole, the water storage chamber is connected to the connecting pipe, and the spray hole is connected to the water storage chamber.

[0013] Preferably, the spray holes include vertical holes and inclined holes; there are two vertical holes, which are symmetrically distributed from left to right; two inclined holes facing the same direction are arranged together, and the inclined holes are provided with at least four pairs of different spray directions.

[0014] Preferably, the spray head is rotatably provided with a cover plate, and the cover plate is provided with a cover strip, which can adjust the number of spray holes exposed during the rotation of the cover strip.

[0015] Preferably, there are multiple rinsing mechanisms, and the cover plate is connected to a rotating motor via a synchronous belt, the rotating motor being fixed on the bar screen frame.

[0016] Preferably, the inner diameter of the water inlet pipe is greater than the sum of the inner diameters of all the connecting pipes; and the inner diameter of each connecting pipe is greater than the sum of the inner diameters of all the spray holes in each spray head.

[0017] To achieve the above objectives, this utility model also proposes a water pump-bar screen linkage system, which uses the aforementioned bar screen machine and also includes a water pump. The bar screen machine is controlled by an intermediate relay, and the intermediate relay is controlled by a PLC to start and stop. The water pump is equipped with a switch, which is connected to the PLC. After the water pump switch is turned on, the PLC controls the intermediate relay to start after a delay.

[0018] Preferably, the delay time for PLC control is set to 10~30 seconds.

[0019] Preferably, the delay time for PLC control is set to 20 seconds.

[0020] Compared with the prior art, the beneficial effects of the bar screen machine and water pump bar screen linkage system provided by this utility model are as follows:

[0021] 1. When the water pump starts, the screen opens after a 20-second delay. At this time, the flow rate is about 35 cubic meters per hour. The garbage flow is obvious at this time, the screen picks up the most garbage, and it is not easy to clog the water pump.

[0022] 2. By using a water storage tank and spray heads to increase the amount of lint and other coverings on the bar screen, the bar screen machine can be used more effectively.

[0023] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of the bar screen machine according to an embodiment of the present utility model.

[0025] Figure 2 This is a schematic diagram of the rinsing mechanism in an embodiment of this utility model.

[0026] Figure 3 This is a schematic diagram of the structure of the spray head in an embodiment of this utility model.

[0027] Figure 4 This is a cross-sectional structural diagram showing the location of the inclined hole in an embodiment of this utility model.

[0028] Figure 5 This is a circuit diagram of the start-up of the bar screen machine in an embodiment of this utility model.

[0029] Figure 6 This is the control logic diagram for starting the PLC in manual mode.

[0030] Figure 7 This utility model describes the control logic diagram of a PLC-controlled water pump that opens in conjunction with a screen 20 seconds after starting and automatically stops after 300 seconds.

[0031] In the diagram: 1. Bar screen frame; 2. Bar screen; 3. Washing mechanism; 31. Inlet pipe; 32. Water storage tank; 33. Spray head; 331. Water storage chamber; 332. Spray hole; 333. Vertical hole; 334. Inclined hole; 34. Connecting pipe; 341. Inlet hole; 35. Cover plate; 351. Cover strip; 36. Synchronous belt; 37. Rotating motor. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0033] In the description of this utility model, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0034] In the description of this utility model, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0036] See Figure 1 and Figure 2 This utility model provides a bar screen machine, including a bar screen frame 1 and a bar screen 2 mounted on the bar screen frame 1. A rinsing mechanism 3 is provided on the bar screen frame 1. The rinsing mechanism 3 includes a water inlet pipe 31, a water storage tank 32 communicating with the water inlet pipe 31, and a spray head 33. The water storage tank 32 and the spray head 33 are connected by a connecting pipe 34. The connecting pipe 34 extends out of the water storage tank 32 from the side wall of the water storage tank 32. The portion of the connecting pipe 34 inside the water storage tank 32 is provided with a water inlet hole 341.

[0037] Specifically, the bar screen of this invention is used in primary screening. The bar screen 2 has small holes, and small impurities such as lint can easily accumulate in these holes, reducing the effectiveness of the bar screen. The rinsing mechanism 3 can directly wash away the impurities covering the bar screen 2. Water from the inlet pipe 31 first enters the water storage tank 32, and the water in the water storage tank 32 enters the spray head 33 through the connecting pipe 34 for rinsing. The water storage tank 32 provides initial pressurization, and since the water in the water storage tank 32 is relatively large, the outlet of the spray head 33 is relatively small.

[0038] For further details, please refer to [link / reference]. Figure 2 The spray head 33 is equipped with a water storage chamber 331 and a spray hole 332. The water storage chamber 331 is connected to the connecting pipe 34, and the spray hole 332 is connected to the water storage chamber 331. Water from the storage tank 32 enters the water storage chamber 331, and then water is sprayed out from the spray hole 332. The water storage chamber 331 increases the water pressure and disperses the water, making it easier to spray to different locations for cleaning.

[0039] For further details, please refer to [link / reference]. Figure 3 and Figure 4 The spray holes 332 include vertical holes 333 and inclined holes 334; there are two vertical holes 333, which are symmetrically distributed from left to right. Two inclined holes 334 facing the same direction are arranged together, and the inclined holes 334 have at least four pairs of different spray directions, preferably four pairs. The different angles of the spray holes 332 provide a more thorough rinsing.

[0040] For further details, please refer to [link / reference]. Figure 3 A cover plate 35 is rotatably mounted on the spray head 33, and a cover strip 351 is provided on the cover plate 35. The cover strip 351 can adjust the number of exposed spray holes 332 during rotation. In actual use, the spray pressure of some holes is higher, and the spray from other holes is prevented from interfering with each other.

[0041] For further details, please refer to [link / reference]. Figure 2 The rinsing mechanism 3 has multiple components. The cover plate 35 is connected to a rotating motor 37 via a synchronous belt 36, and the rotating motor 37 is fixed on the grille frame 1. Preferably, there are eight rinsing mechanisms 3, covering the grille as horizontally as possible. The cover plates 35 are configured to work in tandem, allowing them to spray in the same direction simultaneously. Alternatively, they can be controlled separately, with each motor controlling one cover plate 35.

[0042] Furthermore, the inner diameter of the inlet pipe 31 is larger than the sum of the inner diameters of all the connecting pipes 34; the inner diameter of each connecting pipe 34 is larger than the sum of the inner diameters of all the spray holes 332 in each spray head 33. Overall, the outlet diameter decreases, the water flow becomes more rapid, and the water pressure at the spray nozzles is correspondingly higher. Example 2

[0043] In current operational equipment, after the water pump starts, on-site inspectors often need to manually open the bar screen and monitor its operation. This manual operation is a significant drawback, greatly increasing the workload of the inspectors. Furthermore, the linkage between the water pump and the bar screen presents several problems. For instance, when there is excessive garbage, sewage cannot pass smoothly through the bar screen, leading to a low water level in the pump pool. Frequently low water levels in the pump pool, coupled with the inability to lower the overall water level, can easily cause the water pump motor to burn out. Additionally, large amounts of small debris passing directly through the bar screen can clog it. Accumulated garbage in the bar screen can overload it during occasional use, potentially causing the bar screen motor to burn out and the bar screen to deform.

[0044] To solve the above problems, the present invention links the water pump and the bar screen through a circuit. The water pump provides power for the sewage to flow through the bar screen, while the bar screen is used to screen out large solid waste and impurities in the sewage.

[0045] See Figure 5-7 A water pump-bar linkage system is provided, which uses the bar screen machine in Embodiment 1 and also includes a water pump. The bar screen machine is controlled to switch on and off by an intermediate relay. The intermediate relay is controlled to start and stop by a PLC. The water pump is equipped with a switch, which is connected to the PLC. After the water pump switch is turned on, the PLC controls the intermediate relay to start after a delay.

[0046] Furthermore, the delay time for PLC control is set to 10-30 seconds. Preferably, the delay time for PLC control is set to 20 seconds.

[0047] By designing contactors and intermediate relays in the circuit, the bar screen contactor engages and the bar screen starts when the pump is turned on.

[0048] Without proper coordination, starting the pump before opening the screen is cumbersome, requires personnel to be present, results in low efficiency in removing debris, and can easily clog the pump.

[0049] pass Figure 5 The circuit can achieve multi-mode control (local, remote, automatic) and provide real-time feedback on the operating status through indicator lights.

[0050] Local control: The KM1 coil can be directly controlled via the local button (SBQ11) to start and stop the equipment.

[0051] Remote control: The KO1 relay receives remote signals (such as PLC or DCS instructions) and triggers the KM1 action.

[0052] Automatic control: Automatic processes are achieved by relying on logic relays (KA1) combined with sensor signals or timing control.

[0053] Operation indication logic: HG11 is connected in the auxiliary normally open contact circuit of KM1. When KM1 is energized, the contact closes, the indicator light illuminates, indicating that the equipment is in operation.

[0054] The circuit connections are as follows: Power supply path: V11 → SA11 (main switch) → distributed to each control circuit (local, remote, automatic). Local control circuit: SA11 → SB011 (stop button) → SB711 (start button) → KM1 coil → power supply. Remote control circuit: SA11 → KQ1 contact (remote signal trigger) → KM1 coil → power supply. Automatic control circuit: SA11 → 109KA1 (automatic logic relay) → KM1 coil → power supply.

[0055] pass Figure 6 The system starts in manual mode. `remote_mode` is the remote control mode identifier. In manual mode, this signal must be disabled (e.g., `remote_mode=0`) to block remote commands and prioritize local operations. Manual start / stop signals (e.g., button inputs) directly control the device's start and stop. The logic must be bound to `#central control start` and `#central control stop` to ensure manual operations have higher priority than central control commands. An independent timer must be configured to handle single-run time exceeding limits. The timer starts counting when the device starts, and `#central control stop` is forcibly triggered and an alarm is sounded upon exceeding the limit. The timer's preset value must be set according to the device requirements. This system is primarily written using Siemens TIA Portal software, and then uses Schneider Electric intermediate relays to achieve remote control.

[0056] pass Figure 7 The water pump control logic diagram is used for remote control, employing a Siemens 1200 PLC and Schneider intermediate relays to achieve the following: water pump starts - 20 seconds later, the grille starts - 300 seconds later, the grille automatically stops. The ton-time module is a timer function module used for short-delay control.

[0057] Specifically,

[0058] The input signal triggers the first timer ton-time (IEC_Timer_0_DB_10), with a preset time of 20 seconds. After the first timer ton-time completes its 20-second delay, the output %Q60.0 (*GSLD*) is set, and the grid starts after a preset time of T#300S (300 seconds). After the timer expires, %Q60.0 must be reset to turn off the grid.

[0059] Several solutions were tested after the linkage was implemented:

[0060] The first method: the screen is opened directly when the water pump starts, and the screen automatically stops after running for 5 minutes.

[0061] The second method: the screen opens 10 seconds after the water pump starts, and automatically stops after running for 5 minutes.

[0062] The third method: The screen opens 20 seconds after the water pump starts, and automatically stops after 5 minutes of operation (e.g., ...). Figure 7 (Logic diagram).

[0063] The fourth method: The screen opens 30 seconds after the water pump starts, and automatically stops after 5 minutes of operation.

[0064] Through multiple experiments and observations:

[0065] The first type: The garbage in the pool has virtually no flow effect.

[0066] The second method involves opening the screen 10 seconds after the water pump starts. At this time, the flow rate is approximately 15 cubic meters per hour. The garbage flow effect is not obvious, and the screen's operating efficiency is also low.

[0067] The third method involves starting the water pump and then opening the screen 20 seconds later. At this time, the flow rate is approximately 35 cubic meters per hour, resulting in a noticeable flow of garbage and a significant amount of garbage being collected by the screen machine.

[0068] The fourth method involves a 30-second delay before the bar screen opens after the water pump starts. At this point, the flow rate is approximately 80 cubic meters per hour or more. The garbage flow is too fast, making it easy for it to pass through the bar screen and directly reach the pump sump, potentially causing pump blockage.

[0069] After observation, it was concluded that the third option was the most effective, as it retrieved the most garbage and was less likely to clog the water pump. Therefore, the 20-second option was chosen.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A grating machine comprising a grating machine frame (1) and a grating (2) arranged on the grating machine frame (1); characterized in that: The grille frame (1) is provided with a flushing mechanism (3), the flushing mechanism (3) includes a water inlet pipe (31), a water storage tank (32) communicated with the water inlet pipe (31) and a spray head (33), the water storage tank (32) and the spray head (33) are connected by a connecting pipe (34), the connecting pipe (34) extends out of the water storage tank (32) from the side wall of the water storage tank (32), and the part of the connecting pipe (34) in the water storage tank (32) is provided with a water inlet hole (341).

2. A grating machine as claimed in claim 1, characterized in that: The spray head (33) is provided with a water storage cavity (331) and a spray hole (332), the water storage cavity (331) is communicated with the connecting pipe (34), and the spray hole (332) is communicated with the water storage cavity (331).

3. A grating machine as claimed in claim 2, characterized in that: The spray hole (332) includes vertical holes (333) and inclined holes (334), the vertical holes (333) are two and symmetrically distributed left and right, two same-direction inclined holes (334) are arranged together, and the inclined holes (334) are provided with at least four pairs of different spray directions.

4. A grating machine as claimed in claim 3, characterized in that: The spray head (33) is rotatably provided with a cover plate (35), the cover plate (35) is provided with a cover strip (351), and the number of exposed spray holes (332) can be adjusted during rotation of the cover strip (351).

5. A grating machine as claimed in claim 4, characterised in that: The flushing mechanism (3) has a plurality of cover plates (35) connected by a synchronous belt (36) and a rotating motor (37), and the rotating motor (37) is fixed on the grille frame (1).

6. A grating machine as claimed in claim 5, characterized in that: The inner diameter of the water inlet pipe (31) is greater than the sum of the inner diameters of all connecting pipes (34), and the inner diameter of each connecting pipe (34) is greater than the sum of all spray holes (332) in each spray head (33).

7. A water pump screen linkage system characterized by: The grille machine is used, and a water pump is further included, the grille machine is controlled by an intermediate relay, the intermediate relay is controlled to start and stop by a PLC, the water pump is provided with a switch, the switch is connected with the PLC, and the switch of the water pump is opened; after the switch of the water pump is opened, the PLC controls the intermediate relay to start in a delay mode.

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