A sewage pump

Abstract

The present application belongs to the technical field of water pump, and particularly relates to a sewage pump. The present application can automatically clean the inner wall of the pump body and the impeller during use. The sewage pump comprises a pump shell, a plurality of blades rotatably connected in the pump shell, a control block and a pump cover fixedly connected to the pump shell, a cleaning mechanism installed between the pump shell and the pump cover, and a water inlet and a water outlet arranged on the pump shell. The cleaning mechanism comprises a rotating block, a push frame arranged on the lower side of the rotating block, the push frame being slidably connected in the pump shell, a plurality of blades slidably connected to the rotating block, and a rotating rod rotatably connected to the rotating block. The cleaning mechanism further comprises a sewage cleaning knife, the sewage cleaning knife being arc-shaped, and the arc-shaped concave surface of the sewage cleaning knife facing the water outlet side.

Description

Technical Field

[0001] This invention belongs to the field of water pump technology, and specifically relates to a sewage pump. Background Technology

[0002] Sewage pumps are a type of centrifugal impurity pump, primarily used to transport municipal sewage, feces, or liquids containing solid particles such as fibers and paper scraps. In practical use, sewage pumps are typically installed below sewage tanks and automatically open and close based on the tank's water level. This often results in the pumps not being cleaned promptly after discharge, leading to the accumulation of dirt and grime inside. Over time, this dirt adheres to the pump's internal cavity, reducing its discharge efficiency. Existing self-cleaning sewage pumps primarily clean the inner walls but cannot handle dirt adhering to the impeller. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a sewage pump, the beneficial effect of which is that the present invention can automatically clean the inner wall of the pump body and the impeller during use.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A sewage pump includes a pump casing, a plurality of blades rotatably connected inside the pump casing, a control block and a pump cover fixedly connected to the pump casing, and a cleaning mechanism installed between the pump casing and the pump cover. The pump casing is provided with an inlet and an outlet.

[0006] The cleaning mechanism includes a rotating block, a push frame is provided on the lower side of the rotating block, the push frame is slidably connected inside the pump casing, multiple blades are slidably connected on the rotating block, and a rotating rod is rotatably connected on the rotating block.

[0007] Each of the blades has a stop block on its bottom side, and the rotating block has multiple stop grooves corresponding to the stop blocks.

[0008] The push frame is provided with multiple positioning blocks, and the rotating blocks are surrounded by shielding pages. The lower side of the shielding pages is provided with multiple positioning slots corresponding to the corresponding positioning blocks.

[0009] The cleaning mechanism also includes a pad, which is fixed inside the pump housing and is located inside the push frame.

[0010] The cleaning mechanism also includes an upper push plate, which is fixed to the inside of the pump cover and has multiple extrusion grooves corresponding to the blades.

[0011] All of the extrusion grooves are V-shaped grooves, and all of the upper sides of the blades are provided with V-shaped inclined surfaces.

[0012] The cleaning mechanism also includes an eccentric correction block, which is fixed to the push frame.

[0013] The cleaning mechanism also includes a cleaning blade, which is arc-shaped with its concave surface facing the outlet.

[0014] The cleaning blade is a deformable soft metal sheet. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is an overall structural diagram of a sewage pump;

[0017] Figure 2 A partial cross-sectional view of a sewage pump;

[0018] Figure 3 A partial cross-sectional view of a sewage pump from another angle;

[0019] Figure 4 This is a partial structural diagram of the cleaning mechanism;

[0020] Figure 5 A partial structural cross-sectional view of the cleaning mechanism;

[0021] Figure 6 This is a schematic diagram of the installation of the rotating block and blades;

[0022] Figure 7 This is a schematic diagram of the rotating block and the push frame.

[0023] Figure 8 This is a schematic diagram of the installation of the upper push plate;

[0024] Figure 9 This is a schematic diagram of the structure of the push plate and the blade;

[0025] Figure 10 This is a schematic diagram of the cleaning blade installation. Detailed Implementation

[0026] like Figures 1 to 3 As shown:

[0027] A sewage pump includes a pump casing 100, a plurality of blades 110 rotatably connected inside the pump casing 100 via a rotary motor, a control block 120 connected to the pump casing 100 by screws, a pump cover 130 welded to the pump casing 100, a cleaning mechanism 200 installed between the pump casing 100 and the pump cover 130, and an inlet 101 and an outlet 102 provided on the pump casing 100.

[0028] When the sewage pump is in normal use, the rotary motor is started, and the output shaft of the rotary motor drives the blades 110 to rotate. This allows the sewage to be sucked in through the inlet 101 and pumped out through the outlet 102 by centrifugal force, thus completing the sewage transportation work.

[0029] When the sewage pump needs cleaning, the operator can close the inlet 101 to drain the sewage inside the pump casing 100 as much as possible, then close the outlet 102, and control the cleaning mechanism 200 through the control block 120 to start cleaning the multiple blades 110, thereby preventing dirt from adhering to the blades 110. Then, the cleaning mechanism 200 continues to clean the inner wall of the pump casing 100 and the pump cover 130, thereby completing the cleaning of the inner wall and impeller of the sewage pump, preventing dirt from adhering inside the sewage pump when it is not in use, which would lead to a decrease in sewage discharge efficiency.

[0030] like Figures 4 to 5 As shown:

[0031] The cleaning mechanism 200 includes a rotating block 210, a push frame 220 is provided on the lower side of the rotating block 210, the push frame 220 is slidably connected to the inside of the pump housing 100 through a linear motor and a push groove, a plurality of blades 110 are slidably connected on the rotating block 210, and the rotating block 210 is rotatably connected to the rotating rod 140 through a rotary motor.

[0032] When the sewage pump is working normally, the rotary motor is started, which drives the rotating block 210 to rotate clockwise through the output shaft of the rotary motor. Then, the rotating block 210 drives the blade 110 to rotate clockwise, which in turn drives the sewage through the clockwise rotating blade 110, thus completing the sewage transportation work of the sewage pump.

[0033] When the cleaning mechanism 200 cleans the blade 110, the linear motor is started, and the linear motor and the pusher groove push the pusher frame 220 to move to the left, so that the pusher frame 220 can push the rotating block 210 to move to the left, so that the rotating block 210 and the blade 110 slide relative to each other, so that the rotating block 210 can scrape off the dirt adhering to the blade 110 through relative sliding, thereby automatically completing the cleaning work of the blade 110.

[0034] Meanwhile, since the rotating block 210 uses a relative sliding method to handle the dirt adhering to the blade 110, it can effectively remove the dirt adhering to the blade 110 even when the dirt contains fibers and highly viscous adhesive particles, or when the blade 110 has not been cleaned for a long time, resulting in a thick layer of dirt adhering to the blade 110.

[0035] like Figure 6 As shown:

[0036] Each of the blades 110 has a stop block 111 on its bottom side, and the rotating block 210 has multiple stop grooves 211 corresponding to the stop block 111. This prevents the blades 110 from sliding relative to the rotating block 210 when the rotating motor drives the blades 110 to rotate clockwise through the rotating block 210. This ensures that the blades 110 can stably generate centrifugal force on the sewage, thereby ensuring that the sewage pump can stably pump out the sewage without reducing its working efficiency due to the displacement of the blades 110 themselves.

[0037] Further:

[0038] The cleaning mechanism 200 also includes a pad 230, which is adhered to the inside of the pump housing 100 and is located inside the push frame 220. This prevents sewage seeping through the gap between the moving block 210 and the blade 110 from affecting the linear motor or rotary motor when the linear motor controls the rotating block 210 to move to the left, thereby ensuring the cleanliness of the control area inside the sewage pump and reducing the frequency of cleaning. At the same time, when the linear motor controls the rotating block 210 to move to the right, the pad 230 can work with the rotating block 210 to restrict the blade 110, thereby further preventing relative sliding between the blade 110 and the rotating block 210, and thus further ensuring the stable efficiency of the sewage pump in transporting sewage.

[0039] like Figure 8 and Figure 9 As shown:

[0040] The cleaning mechanism 200 also includes an upper push plate 240, which is welded to the inside of the pump cover 130. The upper push plate 240 has a plurality of extrusion grooves 241 corresponding to the blades 110.

[0041] When the push frame 220 pushes the rotating block 210 to the left, the blade 110 is covered with dirt, which causes friction between the blade 110 and the rotating block 210. This allows the blade 110 to be moved to the left by the rotating block 210. The blade 110 can then be inserted into the corresponding extrusion groove 241. The extrusion groove 241 on the upper push plate 240 can block the blade 110, allowing relative sliding between the blade 110 and the rotating block 210. This ensures that the rotating block 210 can scrape off the dirt on the blade 110, thus automatically completing the cleaning of the impeller inside the sewage pump.

[0042] Further:

[0043] All of the extrusion grooves 241 are V-shaped grooves, and all of the blades 110 have V-shaped inclined surfaces on their upper sides. Thus, the rotating block 210 can drive the blades 110 to move to the left through friction, so that the V-shaped inclined surface at the left end of the blades 110 can fit into the V-shaped groove. This can squeeze out the dirt adhering to the left end of the blades 110, thereby preventing the dirt from adhering to and remaining inside the V-shaped groove on the V-shaped inclined surface at the left end of the blades 110. This ensures that the dirt adhering to the blades 110 can be completely cleaned and removed by the rotating block 210, thus ensuring a perfect cleaning effect for the blades 110.

[0044] like Figure 6 and Figure 7 As shown:

[0045] The push frame 220 is provided with multiple positioning blocks 221, and the rotating block 210 is provided with shielding pages around its perimeter. The lower side of the shielding pages is provided with multiple positioning grooves 212 corresponding to the corresponding positioning blocks 221. Thus, after the sewage pump is used, when the linear motor is started to push the push frame 220 to move the rotating block 210, the positioning blocks 221 can engage with the corresponding positioning grooves 212 to adjust the angle of the rotating block 210. This ensures that the relative angle between the rotating block 210 and the inner cavity of the pump housing 100 does not change when the push frame 220 pushes the rotating block 210 to move. This ensures that the blade 110 can accurately fit with the extrusion groove 241, thereby further ensuring the cleaning effect of the blade 110.

[0046] Meanwhile, the positioning block 221 and the positioning groove 212 can ensure that the rotating block 210 does not rotate during the process of being pushed by the push frame 220, thereby preventing the blade 110 from being pushed by the upper push plate 240. When the blade 110 and the rotating block 210 slide relative to each other, the part of the upper push plate 240 that does not contact the blade 110 is flat, thereby ensuring that the dirt scraped off the blade 110 can be pushed and squeezed to the surroundings by the rotating block 210, and will not remain inside the upper push plate 240.

[0047] like Figure 4 and Figure 5 As shown:

[0048] The cleaning mechanism 200 also includes an eccentric correction block 250, which is welded to the push frame 220;

[0049] When the push frame 220 pushes the rotating block 210 to the left, the eccentric correction block 250 can be driven by the push frame 220 and move to the left along with the rotating block 210. This allows the left side of the rotating block 210 and the left side of the eccentric correction block 250 to be on the same plane. As the rotating block 210 squeezes the dirt scraped off the blade 110, the dirt can be further squeezed by the eccentric correction block 250. This makes the distance between the squeezed dirt and the inner wall of the pump housing 100 equal. Thus, when cleaning the inner wall of the pump housing 100 and the pump cover 130, the squeezed dirt can be cleaned and removed together, thereby completely removing the dirt adhering to the blade 110.

[0050] like Figure 2 , Figure 3 and Figure 10 As shown:

[0051] The cleaning mechanism 200 also includes a cleaning blade 260, which is arc-shaped with the arc-shaped concave surface facing the outlet 102. The cleaning blade 260 is fixed to the inside of the pump housing 100 by a slide rail.

[0052] When the cleaning mechanism 200 needs to clean the inner walls of the pump casing 100 and the pump cover 130, it can activate the slide rail, thereby causing the cleaning blade 260 to rotate counterclockwise along the inner side of the pump casing 100. The cleaning blade 260 can scrape off the dirt adhering to the inner walls of the pump casing 100 and the pump cover 130, as well as the dirt on the blades 110 squeezed out by the rotating block 210. This completes the cleaning of the inner walls of the pump casing 100 and the pump cover 130, as well as the cleaning of the impeller inside the sewage pump. This completes the cleaning work of the cleaning mechanism on the inner cavity of the sewage pump.

[0053] Meanwhile, the arc-shaped cleaning blade 260 can retain the scraped dirt on the arc-shaped concave side of the cleaning blade 260 when cleaning the inner wall of the pump housing 100 and the pump cover 130, thereby preventing the dirt on the cleaning blade 260 from falling off during the cleaning process, and ensuring that the dirt in the inner cavity of the sewage pump can be completely removed by the cleaning blade 260.

[0054] Secondly, since the concave surface of the cleaning blade 260 faces the outlet 102, after the cleaning blade 260 completes the cleaning of the sewage pump's inner cavity, it can remain on the outlet 102 side, so that the dirt left on the cleaning blade 260 faces the outlet 102. When the sewage pump restarts to transport sewage, the sewage can impact the cleaning blade 260, thereby washing away the dirt adhering and retained on the cleaning blade 260. This allows the cleaning blade 260 to self-clean and continue to be used.

[0055] Further:

[0056] The cleaning blade 260 is a deformable soft metal sheet; thus, it can ensure that when the moving block 210 moves to the left and squeezes the dirt together with the upper push plate 240, the cleaning blade 260 can deform, thereby avoiding interference from the movement of the moving block 210.

Claims

1. A sewage pump, characterized in that: It includes a pump casing (100), a plurality of blades (110) rotatably connected inside the pump casing (100), a control block (120) fixed to the pump casing (100) and a pump cover (130), and a cleaning mechanism (200) installed between the pump casing (100) and the pump cover (130). The pump casing (100) is provided with an inlet (101) and an outlet (102). The cleaning mechanism (200) includes a rotating block (210), a push frame (220) is provided on the lower side of the rotating block (210), the push frame (220) is slidably connected inside the pump housing (100), a plurality of blades (110) are slidably connected on the rotating block (210), and a rotating rod (140) is rotatably connected on the rotating block (210). Each of the blades (110) has a stop block (111) on its bottom side, and the rotating block (210) has a plurality of stop grooves (211) corresponding to the stop block (111). The push frame (220) is provided with multiple positioning blocks (221), and the rotating block (210) is provided with a blocking page around its perimeter. The blocking page is provided with multiple positioning slots (212) corresponding to the corresponding positioning blocks (221). The cleaning mechanism (200) also includes a pad (230), which is fixed inside the pump housing (100) and is located inside the push frame (220); The cleaning mechanism (200) also includes an upper push plate (240), which is fixed to the inside of the pump cover (130). The upper push plate (240) has multiple extrusion grooves (241) corresponding to the blades (110). All of the extrusion grooves (241) are V-shaped grooves, and all of the blades (110) have V-shaped inclined surfaces on their upper sides; The cleaning mechanism (200) also includes an eccentric correction block (250), which is fixed to the push frame (220).

2. The sewage pump according to claim 1, characterized in that: The cleaning mechanism (200) also includes a cleaning blade (260), which is arc-shaped with the arc-shaped concave surface facing the outlet (102).

3. A sewage pump according to claim 2, characterized in that: The cleaning blade (260) is a deformable soft metal sheet.

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