Safety protection device for sewage pump station

Abstract

The utility model relates to sewage pump station's technical field, especially sewage pump station safety device for protecting, its through lifter carries out comprehensive safety protection to staff, avoided the risk of falling ladder, and the protection effect is comprehensive, and the security is high, including pump station main part and upper layer platform, still include slide rail stand, two sprocket no.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage pumping stations, and in particular to a safety protection device for sewage pumping stations. Background Technology

[0002] Sewage pumping stations are an important component of sewage systems. A typical pumping station has several sewage pumps and supporting piping systems at its base, and a control box for the sewage pump system in the middle level. When maintaining the sewage pump system, workers need to climb ladders from the middle level to the bottom, which is dangerous and requires special safety protection. Therefore, various safety protection devices for sewage pumping stations have been proposed in the prior art. For example, Chinese utility model patent CN216405678U discloses a safety protection device for sewage pumping stations. This device includes a cylinder, with a lifting rod fixedly installed on one side inside the cylinder. A safety belt is slidably mounted on the lifting rod, and a braking component for emergency braking is installed between the lifting rod and the safety belt. Several climbing bars are evenly distributed vertically on both sides of the lifting rod. The braking component on the lifting rod effectively ensures the personal safety of workers entering the pumping station cylinder, preventing injury from accidental falls. A protective net and safety mat also provide effective safety protection for workers.

[0003] However, the aforementioned safety protection devices are open-type, and when using them, workers are still exposed. They need to climb carefully to avoid falling, resulting in insufficient protection. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a safety protection device for sewage pumping stations that provides comprehensive safety protection for workers through a lifting device, avoiding the risk of falling while climbing ladders, and has a comprehensive protection effect and high safety.

[0005] This utility model discloses a safety protection device for a sewage pumping station, comprising a pumping station body and an upper platform. The pumping station body has a pump chamber inside, and the upper platform is installed in the middle of the pump chamber. It also includes a slide rail column, two sprockets, a chain, a reduction motor, and two lifting devices. The upper platform has two inlets and outlets. The slide rail column is vertically installed in the pump chamber of the pumping station body, with its lower end connected to the bottom of the pump chamber and its upper end extending above the upper platform. The slide rail column is located between the two inlets and outlets of the upper platform. The two sprockets are rotatably mounted on the slide rail column via shafts. At the upper and lower ends, a chain is mounted on two sprockets. A geared motor is installed in the main body of the pump station, and the output shaft of the geared motor is connected to the rotating shaft of the sprockets. Two lifting devices are slidably mounted on the left and right sides of the slide rail column, respectively. The two lifting devices are connected to the left and right parts of the chain. After rising along the slide rail column, the two lifting devices extend above the upper platform through two inlets and outlets, and the two lifting devices are arranged vertically. The lifting devices are preferably of a cage-type structure to ensure structural strength and reduce weight. A door is installed on the cage-type lifting device. The interior of each lifting device is electrically connected to the geared motor. The operator, controller, and associated wiring are all existing technologies and will not be described in detail here. The relative positions of the two lifts are such that when one lift is located at the bottom of the pump unit chamber in the main body of the pump station, the other lift extends above the upper platform through an inlet / outlet. During operation, after entering the main body of the pump station, the worker first reaches the upper platform. The worker enters the interior of the lift through the door located above the upper platform and controls the reduction motor via the operator on the lift. The reduction motor drives the first sprocket to rotate, thereby causing the first sprocket to drive the reduction motor to rotate, thus... The geared motor lowers the personnel-carrying elevator along one side of the slide rail column, while simultaneously raising the unloaded elevator along the other side of the slide rail column. When the personnel-carrying elevator reaches the bottom of the pump unit chamber of the main pump station, the unloaded elevator reaches the top of the upper platform through the inlet and outlet. After the staff opens the elevator door and exits, they begin to inspect the sewage pump system. Compared to existing technologies where staff are inside the elevator during the lifting process, the elevator provides comprehensive safety protection for the staff, eliminating the need for staff to climb and avoiding the risk of falling down ladders. The protection is comprehensive and the safety is high.

[0006] Preferably, the system further includes two shafts, two hook plates, two upper rods, and two lower rods. The two shafts are rotatably mounted on two lifting devices. The middle portions of the two hook plates are connected to the two shafts respectively. Each hook plate has an upper hook groove at its upper end, with the openings of the two upper hook grooves facing the two lifting devices. Each hook plate has a lower groove at its lower end, with the openings of the two lower grooves facing away from the two lifting devices. The two upper rods are respectively mounted on the left and right sides of the upper end of the slide rail column, and the upper hook grooves of the two hook plates are used to hook and connect with the two upper rods respectively. The two lower rods are respectively mounted on the left and right sides of the lower end of the slide rail column, and the lower grooves of the two hook plates are used to hook and connect with the two lower rods respectively. The two shafts are connected to the two lifting devices respectively via elastic elements. The elastic rotating connection keeps the two hook plates vertical. When one lifter reaches the top of the slide rail column, the upper groove of the hook plate on that lifter hooks onto an upper rod. Simultaneously, when the other lifter reaches the bottom of the slide rail column, the lower groove of the hook plate on that lifter hooks onto a lower rod. This locks the two lifters in place, preventing them from falling. Preferably, two handles are installed in the middle of the two hook plates, extending into the interior of each lifter. Pulling the handles upwards rotates the hook plates, disengaging the upper or lower grooves from the upper or lower rods, thus releasing the lifter. This simple operation allows for easy operation.

[0007] Preferably, the system also includes two sprockets (second and third), two sprockets (third and fourth), and a chain (second). The two sprockets (second) are concentrically mounted on two shafts, and the two sprockets (third) are rotatably mounted on the upper and lower ends of the slide rail column, respectively. The chain (second) is fitted onto the two sprockets (third), and the two sprockets (second) are connected to the left and right sides of the chain (second). The two sprockets (third) rotatably support the chain (second). When a handle is turned to rotate the shaft and hook plate, causing the upper groove of the hook plate to disengage from the upper rod, one sprocket (second) concentric with the shaft engages and drives the chain (second) to rotate. The rotation of the chain (second) engages the other sprocket (second) to rotate synchronously. The other sprocket (second) drives another shaft and another hook plate to rotate, causing the lower groove of the other hook plate to disengage from the lower rod. This allows the two lifters to unlock synchronously, simplifying operation. When the two lifters are raising and lowering, the two sprockets (second) engage and drive the chain (second) to rotate synchronously, without obstructing or interfering with the raising and lowering of the lifters, making it highly practical.

[0008] Preferably, it also includes two cover plates, one end of which is hinged to the upper surface of the upper platform. The two cover plates cover the two entrances and exits of the upper platform respectively. When one elevator rises above the upper platform through one entrance and exit, the elevator lifts one cover plate. When the other elevator descends below the upper platform through another entrance and exit, the other cover plate naturally covers the other entrance and exit under the action of gravity, thereby shielding the entrance and exit and preventing workers from falling.

[0009] Preferably, it also includes two buffer pads, which are installed at the bottom of the pump set chamber of the main body of the pump station and located below the two elevators respectively; when the elevators descend to the lowest position, the buffer pads are placed between the elevators and the bottom of the pump set chamber of the main body of the pump station to cushion the elevators and reduce the impact force when the elevators fall.

[0010] Preferably, the system also includes a flywheel, multiple friction blocks, multiple springs, and a friction hub. The flywheel is concentrically mounted on the shaft of a sprocket. Multiple friction blocks are evenly arranged circumferentially on the end face of the flywheel and slide radially along the flywheel. The outer ends of multiple springs are connected to multiple friction blocks, and the other ends of multiple springs are connected to the flywheel. The friction hub is installed inside the pump station body and is fitted around the outer side of the multiple friction blocks. A gap is provided between the inner wall of the friction hub and the multiple friction blocks. When workers descend via a lift, the lift drives the chain and sprocket to rotate under gravity. The sprocket drives the flywheel and multiple friction blocks to rotate. Under the action of centrifugal force, the multiple friction blocks stretch the multiple springs and move outwards from the flywheel to rub against the inner wall of the friction hub, thereby slowing down and limiting the speed of the flywheel. When the flywheel stops rotating, the multiple springs contract, causing the multiple friction blocks to disengage from the friction hub. This eliminates the need for a geared motor to output power when the lift descends, making it more energy-efficient and allowing for emergency use in case of power failure. After maintenance is completed, the fault is rectified, and power is restored, workers can use the geared motor to drive the lift back.

[0011] Compared with the prior art, the advantages of this utility model are as follows: the staff are inside the elevator during the lifting process, and the elevator provides comprehensive safety protection for the staff. There is no need for the staff to climb, avoiding the risk of falling down the ladder. The protection effect is comprehensive and the safety is high. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view structural diagram of the present invention; Figure 3 It is a structural diagram of the slide rail column, chain 1, geared motor, lifting device, flywheel, friction block, spring and friction hub, etc. Figure 4 It is a structural diagram of the slide rail column, sprocket one, chain one, upper rod, lower rod, sprocket three, chain two, and flywheel, etc. Figure 5 It is a structural diagram showing the disassembled state of the slide rail column, sprocket one, chain one, geared motor, sprocket three, chain two, flywheel, friction block, spring and friction hub. Figure 6 This is a structural diagram of the lifting device, shaft, hook plate, and sprocket. Figure 7 yes Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0013] The following are labeled in the attached diagram: 1. Pump station main body; 2. Upper platform; 3. Slide rail column; 4. Sprocket 1; 5. Chain 1; 6. Gear motor; 7. Lifter; 8. Shaft; 9. Hook plate; 10. Upper rod; 11. Lower rod; 12. Sprocket 2; 13. Sprocket 3; 14. Chain 2; 15. Cover plate; 16. Buffer pad; 17. Flywheel; 18. Friction block; 19. Spring; 20. Friction hub. Detailed Implementation

[0014] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0015] like Figures 1 to 3 As shown, a safety protection device for a sewage pumping station includes a pumping station body 1 and an upper platform 2. The pumping station body 1 has a pump chamber inside, and the upper platform 2 is installed in the middle of the pump chamber. It also includes a slide rail column 3, two sprockets 4, a chain 5, a reduction motor 6, and two lifting devices 7. The upper platform 2 has two inlets and outlets. The slide rail column 3 is vertically installed in the pump chamber of the pumping station body 1. The lower end of the slide rail column 3 is connected to the bottom of the pump chamber of the pumping station body 1, and the upper end of the slide rail column 3 extends above the upper platform 2. The slide rail column 3 is located between the two inlets and outlets of the upper platform 2. The two sprockets 4 are rotatably mounted on the upper and lower ends of the slide rail column 3 via rotating shafts, respectively. The chain 5 is fitted onto the two sprockets 4. The speed reducer 6 is installed in the main body 1 of the pump station. The output shaft of the speed reducer 6 is connected to the rotating shaft of the sprocket 4. The two lifting devices 7 are slidably installed on the left and right sides of the slide rail column 3. The two lifting devices 7 are connected to the left and right sides of the chain 5. After the two lifting devices 7 rise along the slide rail column 3, they extend out above the upper platform 2 through the two inlets and outlets respectively. The two lifting devices 7 are arranged vertically. It also includes two cover plates 15. One end of the two cover plates 15 is hinged to the upper end face of the upper platform 2. The two cover plates 15 cover the two inlets and outlets of the upper platform 2 respectively. It also includes two buffer pads 16. The two buffer pads 16 are installed at the bottom of the pump group chamber of the main body 1 of the pump station. The two buffer pads 16 are located below the two lifting devices 7 respectively.

[0016] The lifting device 7 is preferably a cage-type structure to ensure structural strength and reduce weight. A door is installed on the cage-type lifting device 7. Both lifting devices 7 have an operator electrically connected to the control of the reduction motor 6 inside. The operator, controller, and associated wiring are all existing technologies and will not be described in detail here. The relative positions of the two lifting devices 7 are such that when one lifting device 7 is located at the bottom of the pump chamber of the pump station body 1, the other lifting device 7 extends above the upper platform 2 through an inlet / outlet. During operation, after entering the pump station body 1, the operator first reaches the upper platform 2. The operator enters the interior of the lifting device 7 through the door located above the upper platform 2 and controls the reduction motor 6 using the operator on the lifting device 7. The geared motor 6 drives the sprocket 4 to rotate, which in turn drives the geared motor 6 to rotate. This causes the geared motor 6 to lower the personnel-carrying elevator 7 along one side of the slide rail column 3. At the same time, the geared motor 6 raises the unloaded elevator 7 along the other side of the slide rail column 3. When the personnel-carrying elevator 7 reaches the bottom of the pump chamber of the pump station body 1, the unloaded elevator 7 reaches the top of the upper platform 2 through the inlet and outlet of the upper platform 2. After the staff opens the door of the elevator 7 and exits, they begin to inspect the sewage pump system. Compared with the existing technology, where staff are inside the elevator 7 during the lifting process, the elevator 7 provides comprehensive safety protection for the staff. There is no need for staff to climb, avoiding the risk of falling from the ladder. The protection effect is comprehensive and the safety is high.

[0017] When one lifter 7 rises above the upper platform 2 through one inlet / outlet, the lifter 7 lifts up a cover plate 15. When another lifter 7 descends below the upper platform 2 through another inlet / outlet, the other cover plate 15 naturally covers the other inlet / outlet under the action of gravity, thereby shielding the inlet / outlet and preventing workers from falling.

[0018] When the elevator 7 descends to its lowest position, the buffer pad 16 is placed between the elevator 7 and the bottom of the pump chamber of the pump station body 1 to buffer the elevator 7 and reduce the impact force when the elevator 7 falls. Example 2

[0019] like Figures 4 to 7As shown, based on Embodiment 1, it also includes two shafts 8, two hook plates 9, two upper rods 10, and two lower rods 11. The two shafts 8 are rotatably mounted on the two lifting devices 7 respectively. The middle parts of the two hook plates 9 are respectively connected to the two shafts 8. The upper ends of the two hook plates 9 are provided with upper hook grooves, and the openings of the two upper hook grooves face the two lifting devices 7 respectively. The lower ends of the two hook plates 9 are provided with lower grooves, and the openings of the two lower grooves face away from the two lifting devices 7 respectively. The two upper rods 10 are respectively installed on the left and right sides of the upper end of the slide rail column 3. The upper hooks of the two hook plates 9 are... The groove is used to hook and connect with the two upper rods 10 respectively. The two lower rods 11 are respectively installed on the left and right sides of the lower end of the slide rail column 3. The lower grooves of the two hook plates 9 are used to hook and connect with the two lower rods 11 respectively. It also includes two sprockets 12, two sprockets 13 and chain 14. The two sprockets 12 are respectively concentrically installed on the two shafts 8. The two sprockets 13 are respectively rotatably installed on the upper and lower ends of the slide rail column 3. The chain 14 is fitted and connected to the two sprockets 13. The two sprockets 12 are respectively connected to the left and right parts of the chain 14.

[0020] Two shafts 8 are elastically rotatably connected to two lifting devices 7 via elastic elements. The elastic force of the elastic elements keeps the two hook plates 9 in a vertical state. When one lifting device 7 reaches the upper end of the slide rail column 3, the upper groove of the hook plate 9 on the one lifting device 7 is hooked to an upper rod 10. At the same time, when the other lifting device 7 reaches the lower end of the slide rail column 3, the lower groove of the hook plate 9 on the other lifting device 7 is hooked to a lower rod 11. This locks the position of the two lifting devices 7 and prevents them from falling. Two sprockets 13 rotate to support chain 14. Two handles are installed in the middle of the two hook plates 9, and the two handles extend into the interior of the two lifting devices 7. When one handle is turned to rotate the shaft 8 and hook plate 9, causing the upper groove of the hook plate 9 to disengage from the upper rod 10, a sprocket 12 concentric with the shaft 8 engages to drive chain 14 to rotate. The rotation of chain 14 engages the other sprocket 12 to rotate synchronously. The other sprocket 12 drives the other shaft 8 and the other hook plate 9 to rotate, causing the lower groove of the other hook plate 9 to disengage from the lower rod 11. This allows the two lifting devices 7 to unlock synchronously and release them. The operation is simple. When the two lifting devices 7 are raised or lowered, the two sprockets 12 engage to drive chain 14 to rotate synchronously, which will not obstruct or interfere with the raising or lowering of the lifting devices 7, making it highly practical. Example 3

[0021] like Figure 3 and Figure 5As shown, based on Embodiment 1, it also includes a flywheel 17, multiple friction blocks 18, multiple springs 19, and a friction hub 20. The flywheel 17 is concentrically mounted on the shaft of a sprocket 4. The multiple friction blocks 18 are evenly arranged circumferentially on the end face of the flywheel 17. The multiple friction blocks 18 slide radially along the flywheel 17. The outer ends of the multiple springs 19 are respectively connected to the multiple friction blocks 18, and the other ends of the multiple springs 19 are connected to the flywheel 17. The friction hub 20 is installed inside the pump station body 1 and is sleeved on the outside of the multiple friction blocks 18. A gap is provided between the inner wall of the friction hub 20 and the multiple friction blocks 18.

[0022] When workers descend via a lift 7, the lift 7 drives the chain 5 and sprocket 4 to rotate under gravity. The sprocket 4 drives the flywheel 17 and multiple friction blocks 18 to rotate. Under the action of centrifugal force, the multiple friction blocks 18 stretch multiple springs 19 and move outwards from the flywheel 17 to rub against the inner wall of the friction hub 20, thereby slowing down and limiting the speed of the flywheel 17. When the flywheel 17 stops rotating, the multiple springs 19 contract, causing the multiple friction blocks 18 to disengage from the friction hub 20. Thus, the lift 7 does not require the output of the reduction motor 6 when descending, which is more energy-efficient and can also be used in case of power failure. After the maintenance is completed, the fault is eliminated, and the power is restored, the workers can use the reduction motor 6 to drive the return.

[0023] like Figures 1 to 7As shown, this utility model discloses a safety protection device for a sewage pumping station. During operation, workers first enter the main body 1 of the pumping station and reach the upper platform 2. They then enter the interior of the elevator 7 through the door located above the upper platform 2. By turning the handle lever to rotate the hook plate 9, the two sprockets 12 and chain 14 unlock the two elevators 7. The personnel-carrying elevator 7 then rotates the chain 5 and sprocket 4 under gravity. Sprocket 4 drives the flywheel 17 and multiple friction blocks 18 to rotate. Under centrifugal force, the multiple friction blocks 18 stretch multiple springs 19, causing them to move outwards from the flywheel 17 and rub against the inner wall of the friction hub 20, thus slowing down and limiting the speed of the flywheel 17 as it descends. Simultaneously, the reduction motor 6 lowers the unloaded... The elevator 7 is lifted along the other side of the slide rail column 3. When the elevator 7 carrying personnel reaches the bottom of the pump chamber of the main body 1 of the pump station, the unloaded elevator 7 reaches the top of the upper platform 2 through the inlet and outlet of the upper platform 2. After the staff opens the door of the elevator 7 and walks out of the elevator 7, they begin to inspect the sewage pump system. After the inspection is completed, the staff enters the elevator 7 located below and controls the operation of the reduction motor 6 through the operator on the elevator 7. The reduction motor 6 drives the sprocket 4 to rotate, thereby causing the sprocket 4 to drive the reduction motor 6 to rotate. This causes the reduction motor 6 to lift the elevator 7 carrying personnel along one side of the slide rail column 3 and lift a cover plate 15. After the staff hooks the upper rod 10 through the upper groove of the hook plate 9, the staff can walk out through the door of the elevator 7.

[0024] The main functions achieved by this utility model are: 1. During the lifting process, the staff are inside the lifting device 7, which provides comprehensive safety protection for the staff. There is no need for the staff to climb, avoiding the risk of falling down the ladder. The protection effect is comprehensive and the safety is high. 2. A synchronous locking structure consisting of a hook plate 9, an upper rod 10, and a lower rod 11 is provided to improve the locking effect of the two lifting devices 7. 3. It has a deceleration and speed limiting mechanism, so that the personnel lift 7 does not need to output the geared motor 6 when descending, which is more energy-efficient and can also be used in case of power failure. After the maintenance is completed, the fault is eliminated and the power is restored, the staff can use the geared motor 6 to drive it back.

[0025] This utility model discloses a safety protection device for sewage pumping stations. Its installation, connection, or setting methods are all common mechanical methods, and any method that can achieve its beneficial effect can be implemented. The pumping station body 1, upper platform 2, slide rail column 3, sprocket 1 4, chain 1 5, geared motor 6, lifting device 7, shaft 8, upper rod 10, lower rod 11, sprocket 2 12, sprocket 3 13, chain 2 14, buffer pad 16, cover plate 15, friction block 18, spring 19, and friction hub 20 of this utility model are all purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0026] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A safety protection device for a sewage pumping station, comprising a pumping station body (1) and an upper platform (2), wherein a pump set chamber is provided inside the pumping station body (1), and the upper platform (2) is installed in the middle of the pump set chamber; characterized in that, It also includes a slide rail column (3), two sprockets (4), a chain (5), a geared motor (6), and two lifters (7). Two inlets and outlets are set on the upper platform (2). The slide rail column (3) is vertically installed in the pump chamber of the pump station body (1). The lower end of the slide rail column (3) is connected to the bottom of the pump chamber of the pump station body (1). The upper end of the slide rail column (3) extends above the upper platform (2). The slide rail column (3) is located between the two inlets and outlets of the upper platform (2). The two sprockets (4) are respectively installed on the slide rail column through a rotating shaft. (3) At the upper and lower ends, chain 1 (5) is fitted on two sprockets 1 (4). The geared motor (6) is installed in the main body (1) of the pump station. The output shaft of the geared motor (6) is connected to the rotating shaft of sprocket 1 (4). Two lifting devices (7) are slidably installed on the left and right sides of the slide rail column (3). The two lifting devices (7) are connected to the left and right sides of chain 1 (5). After the two lifting devices (7) rise along the slide rail column (3), they extend above the upper platform (2) through two inlets and outlets. The two lifting devices (7) are arranged vertically.

2. The safety protection device for a sewage pumping station as described in claim 1, characterized in that, It also includes two shafts (8), two hook plates (9), two upper rods (10) and two lower rods (11). The two shafts (8) are rotatably mounted on the two lifting devices (7). The middle part of the two hook plates (9) is connected to the two shafts (8). The upper end of the two hook plates (9) is provided with an upper hook groove. The opening of the two upper hook grooves faces the two lifting devices (7) respectively. The lower end of the two hook plates (9) is provided with a lower groove. The opening of the two lower grooves faces away from the two lifting devices (7) respectively. The two upper rods (10) are installed on the upper left and right sides of the slide rail column (3) respectively. The upper hook grooves of the two hook plates (9) are used to hook and connect with the two upper rods (10) respectively. The two lower rods (11) are installed on the lower left and right sides of the slide rail column (3) respectively. The lower grooves of the two hook plates (9) are used to hook and connect with the two lower rods (11) respectively.

3. A safety protection device for a sewage pumping station as described in claim 2, characterized in that, It also includes two sprockets (12), two sprockets (13) and a chain (14). The two sprockets (12) are concentrically mounted on two shafts (8), and the two sprockets (13) are rotatably mounted on the upper and lower ends of the slide rail column (3). The chain (14) is fitted and connected to the two sprockets (13). The two sprockets (12) are connected to the left and right parts of the chain (14) respectively.

4. The safety protection device for a sewage pumping station as described in claim 1, characterized in that, It also includes two cover plates (15), one end of which is hinged to the upper surface of the upper platform (2), and the two cover plates (15) cover the two inlets and outlets of the upper platform (2) respectively.

5. A safety protection device for a sewage pumping station as described in claim 1, characterized in that, It also includes two buffer pads (16), which are installed at the bottom of the pump group chamber of the main body (1) of the pump station, and the two buffer pads (16) are located below the two elevators (7).

6. A safety protection device for a sewage pumping station as described in claim 1, characterized in that, It also includes a flywheel (17), multiple friction blocks (18), multiple springs (19) and a friction hub (20). The flywheel (17) is concentrically mounted on the shaft of a sprocket (4). Multiple friction blocks (18) are evenly arranged on the end face of the flywheel (17) around the circumference. Multiple friction blocks (18) slide along the radial direction of the flywheel (17). The outer ends of multiple springs (19) are connected to multiple friction blocks (18) respectively. The other ends of multiple springs (19) are connected to the flywheel (17). The friction hub (20) is installed inside the pump station body (1). The friction hub (20) is sleeved on the outside of multiple friction blocks (18). A gap is set between the inner wall of the friction hub (20) and multiple friction blocks (18).

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