Multi-stage anti-blocking sewage pump

Abstract

The invention relates to the technical field of sewage pumps, in particular to a multi-stage anti-blocking sewage pump which comprises a pump body, a connecting pipe, an impeller, a supporting frame body, a crushing cutter and a cross cutter set, inserting grooves are formed in the left side and the right side of the inner wall of the connecting pipe, a filter plate is inserted into the upper side of the inner wall of the connecting pipe, and inserting blocks are installed on the left side and the right side of the filter plate; the sewage pump has the beneficial effects that the connecting shaft is synchronously driven to rotate through rotation of the impeller, so that the scraping plate is driven to scrape the top of the filter plate, the risk that the sewage pump is blocked due to the fact that impurities block the filter plate in the crushing process of the cross-shaped cutter set is reduced, meanwhile, the multi-stage crushing function is achieved through the synergistic effect of the cross-shaped cutter set, the supporting frame and the crushing cutters, and the service life of the sewage pump is prolonged. Therefore, foreign matters which cannot be directly conveyed can be intercepted by the filter plate and further crushed by the crushing cutter and the cross-shaped cutter group, large impurities and foreign matters are effectively prevented from entering the sewage pump, the blockage phenomenon is avoided, and the conveying effect and efficiency of the sewage pump are improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage pumps, in particular to a multi-stage anti-clogging sewage pump. Background Art

[0002] With the acceleration of industrialization and the continuous expansion of urban scale, sewage treatment has become one of the important environmental problems facing modern society. As an indispensable key equipment in the sewage treatment system, the performance and efficiency of the sewage pump directly affect the smooth operation of the entire sewage treatment process. However, there is a significant problem in the actual application of existing sewage pumps. They lack an effective anti-clogging mechanism, which makes the sewage pump prone to clogging during operation, thus affecting its normal use effect.

[0003] In the prior art, sewage pumps often encounter impurities such as solid particles, fibrous substances, and long fibers contained in sewage when pumping sewage. These impurities are easily entangled on the impeller or stuck in the pump casing when passing through the sewage pump, causing blockage of the impeller or the flow channel of the pump casing, thereby reducing the delivery efficiency of the sewage pump and even causing the sewage pump to fail to work normally. Especially in a sewage environment containing more impurities, the blockage problem of the sewage pump is more prominent.

[0004] Therefore, a multi-stage anti-clogging sewage pump is needed to solve the problem that the existing sewage pump lacks an effective anti-clogging mechanism, causing the impeller to get stuck, thereby reducing the sewage pump delivery efficiency. Summary of the invention

[0005] The object of the present invention is to provide a multi-stage anti-clogging sewage pump to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-stage anti-clogging sewage pump, comprising a pump body, a connecting pipe, an impeller, a supporting frame, a crushing knife and a cross knife group, wherein the inner wall of the connecting pipe is provided with a plug-in groove on both sides, a filter plate is plugged into the upper side of the inner wall of the connecting pipe, and plug-in blocks are installed on the left and right sides of the filter plate, and the plug-in blocks are plugged into the bottom of the inner wall of the plug-in groove, a connecting shaft is connected to the middle part of the supporting frame through a bearing, and a fitting block is installed on the top of the connecting shaft, a fitting groove is provided at the bottom of the impeller, and the fitting block is plugged into the inner wall of the fitting groove, a slot is provided on both sides of the connecting shaft, and a supporting block is plugged into the inner wall of the slot, two positioning plates are installed on the side of the bottom of the supporting block away from the connecting pipe, the positioning plate is plugged into the bottom of the inner wall of the slot, a scraper is installed at the bottom of the support block, and the bottom of the scraper is in contact with the top of the filter plate.

[0007] Preferably, a slide groove is opened inside the side of the support block close to the connecting tube, a limiting plate is installed on the inner wall of the slide groove, an elastic part is installed on one side of the limiting plate, and a plug is installed on the other side, and a plurality of fitting grooves are opened on the upper side of the inner wall of the connecting tube.

[0008] Preferably, the separated ends of the plug posts on the left and right sides penetrate the support block and are inserted into the inner wall of the fitting groove, and the adjacent sides of the elastic member 1 on the left and right sides are installed on the inner wall of the slide groove 1.

[0009] Preferably, an oil storage tank is provided inside the support block on a side away from the connecting pipe, an oil filling pipe is installed on the top of the oil storage tank, oil outlet tanks are provided on the sides close to the bottom of the left and right oil storage tanks, a piston is inserted into the inner wall of the oil outlet tank, an output hole is provided in the middle of the piston, a through groove is provided in the middle of the oil outlet tank, and a connecting groove is provided on the bottom wall of the slot.

[0010] Preferably, the piston is inserted into the top end of the through groove, the through groove and the connecting groove are vertically arranged and interpenetrating, and the connecting groove is arranged on the top of the bearing.

[0011] Preferably, a slide groove 2 is provided inside the adjacent side of the support blocks on the left and right sides, a push block is installed on the inner wall of the slide groove 2, a dial plate is installed on the top of the push block, an elastic member 2 is installed on the separated side of the push blocks on the left and right sides, a connecting block is installed on the bottom of the push block, a limiting plate is inserted into the adjacent side of the support blocks on the left and right sides, connecting plates are installed on the front and rear sides of the limiting plates, an elastic member 3 is installed on the bottom of the connecting plate, and two slide grooves 3 are provided inside the side of the support block away from the connecting pipe.

[0012] Preferably, the separated sides of the elastic member 2 on the left and right sides are both installed on the inner wall of the slide groove 2, the shift plate is plugged into the top of the support block, the connecting block is installed between the piston, and the connecting block passes through the oil outlet groove.

[0013] Preferably, the connecting plate is slidably connected to the inner wall of the slide slot three, the bottom of the elastic member three is installed on the bottom wall of the slide slot three, the lower part of the limiting plate is fitted between the push block, and the top of the limiting plate is inserted into the inner top wall of the slot.

[0014] Preferably, insertion blocks are installed at the four corners of the cross knife group, a plurality of insertion slots are opened on the top of the support frame, the insertion blocks are inserted into the inner walls of the insertion slots, the middle part of the cross knife group is inserted into the bottom end of the connecting shaft, a plurality of fixing screws are inserted into the bottom of the connecting shaft, the fixing screws pass through the connecting shaft and are threadedly connected to the middle part of the cross knife group.

[0015] Preferably, the support blocks on the left and right sides are symmetrically arranged, and the filter plate is arranged on the top of the cross knife group.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The multi-stage anti-clogging sewage pump proposed in the present invention synchronously drives the connecting shaft to rotate through the rotation of the impeller, thereby driving the scraper to scrape the top of the filter plate, reducing the risk of clogging the sewage pump due to impurities clogging the filter plate during the crushing process of the cross knife group. At the same time, the synergy between the cross knife group, the support frame and the crushing knife is used to achieve a multi-stage crushing function. In this way, foreign matter that cannot be directly transported will be intercepted by the filter plate and further crushed by the crushing knife and the cross knife group, effectively preventing larger impurities and foreign matter from entering the interior of the sewage pump and avoiding clogging, thereby improving the transportation effect and efficiency of the sewage pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereogram of the present invention;

[0019] Figure 2 It is a right side view of the present invention;

[0020] Figure 3 for Figure 2 Structural cross-section at AA in the middle;

[0021] Figure 4 This is a schematic diagram of the structure of the mounting slot of the present invention;

[0022] Figure 5 This is a schematic diagram of the assembly block structure of the present invention;

[0023] Figure 6 for Figure 5 Structural cross-section at the middle BB;

[0024] Figure 7 This is a schematic diagram of the connecting pipe structure of the present invention;

[0025] Figure 8 for Figure 7 Structural cross-section at the middle CC;

[0026] Fig. 9 This is a schematic diagram of the insertion slot structure of the present invention;

[0027] Fig.10 This is a schematic diagram of the plug-in block structure of the present invention;

[0028] Fig.11 Insert block structure schematic diagram of the present invention;

[0029] Fig.12 This is a schematic diagram of the connecting shaft structure of the present invention;

[0030] Fig.13 for Fig.12 Structural cross-section at DD in the middle;

[0031] Fig.14 This is a schematic diagram of the positioning plate structure of the present invention;

[0032] Fig.15 for Fig.14 Structural cross-section at EE;

[0033] Fig.16 for Fig.15 A magnified view of the structure at F in the middle;

[0034] Fig.17 This is a schematic diagram of the support block structure of the present invention;

[0035] Fig.18 for Fig.17 Structural cross-section at GG in the middle;

[0036] Fig.19 It is a schematic diagram of the connecting groove structure of the present invention.

[0037] In the figure: 1, pump body; 2, connecting pipe; 3, impeller; 4, support frame; 5, fitting groove; 6, connecting shaft; 7, fitting block; 8, plug-in groove; 9, fitting groove; 10, plug-in block; 11, crushing knife; 12, insertion groove; 13, filter plate; 14, insertion block; 15, cross knife set; 16, fixing screw; 17, support block; 18, scraper; 19, slot; 20, plug column; 21, fixed Position plate; 22, oil storage tank; 23, oil filling pipe; 24, slide groove one; 25, elastic part one; 26, limit plate; 27, dial plate; 28, elastic part two; 29, slide groove two; 30, oil outlet groove; 31, output hole; 32, piston; 33, connecting block; 34, through groove; 35, push block; 36, limit plate; 37, connecting plate; 38, elastic part three; 39, slide groove three; 40, connecting groove. DETAILED DESCRIPTION

[0038] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1: Please refer to Figures 1 to 19The present invention provides a technical solution: a multi-stage anti-clogging sewage pump, comprising a pump body 1, a connecting pipe 2, an impeller 3, a supporting frame 4, a crushing knife 11 and a cross knife group 15, wherein the crushing knife 11 and the cross knife group 15 are used to achieve multi-stage crushing, thereby reducing the entry of larger impurities into the inner wall of the pump body 1, and the connecting pipe 2 and the pump body 1 are integrally cast. In order to facilitate the maintenance of the parts in the connecting pipe 2 in the later stage, the connecting pipe 2 is divided into two and changed into an assembled type. The inner wall of the connecting pipe 2 is provided with a plug-in groove 8 on both sides, and a filter plate 13 is plugged into the upper side of the inner wall of the connecting pipe 2. The left and right sides of the filter plate 13 are installed with a plug-in block 10, and the plug-in block 10 is plugged into the bottom of the inner wall of the plug-in groove 8. The middle part of the supporting frame 4 is connected to a connecting shaft 6 through a bearing, and the top of the connecting shaft 6 is installed with a matching The mounting block 7 and the bottom of the impeller 3 are provided with a mounting groove 5, and the mounting block 7 is plugged into the inner wall of the mounting groove 5. Slots 19 are provided on the left and right sides of the connecting shaft 6, and the inner wall of the slot 19 is plugged with a support block 17. Two positioning plates 21 are installed on the side of the bottom of the support block 17 away from the connecting pipe 2, and the positioning plates 21 are plugged into the bottom of the inner wall of the slot 19. A scraper 18 is installed at the bottom of the support block 17, and the bottom of the scraper 18 fits with the top of the filter plate 13; the left and right support blocks 17 are symmetrically arranged, and the filter plate 13 is arranged on the top of the cross knife group 15, so that larger foreign matter and impurities are filtered out by the filter plate 13 and crushed by the cross knife group 15, thereby preventing the pump body 1 from being blocked, and the scraper 18 is used to scrape the surface of the filter plate 13 to reduce the residue of broken foreign matter on its surface.

[0040] First, the pump body 1 is started to drive the impeller 3 to transport sewage. Since the connecting shaft 6 is inserted into the bottom of the impeller 3 through the mounting block 7, the connecting shaft 6 is synchronously driven to rotate. At this time, since the connecting shaft 6 is connected to the filter plate 13 through the bearing, and the filter plate 13 is plugged into the plug-in blocks 10 on both sides and the plug-in slots 8, the connecting shaft 6 drives the cross knife group 15 to rotate, and at the same time drives the bottom support frame 4 to rotate, thereby driving the crushing knife 11 to rotate synchronously, and the crushing knife 11 is used to crush foreign matter on the inner wall of the connecting pipe 2. At the same time, when filtering through the filter plate 13, the cross knife group 15 is used to crush the larger foreign matter filtered out again, thereby realizing multi-stage crushing and preventing the pump body 1 from being blocked. In this process, since the support blocks 17 are plugged into the lower sides of the connecting shaft 6, and the scraper 18 is installed at the bottom of the support block 17, the scraper 18 is synchronously driven to scrape the surface of the filter plate 13 to reduce the residue of foreign matter after crushing, thereby improving the scraping effect.

[0041] Embodiment 2: On the basis of embodiment 1, in order to achieve the scraping effect of the scraper 18, a slide groove 24 is opened inside the support block 17 on the side close to the connecting pipe 2, and a limit plate 26 is installed on the inner wall of the slide groove 24. An elastic member 25 is installed on one side of the limit plate 26, and a plug post 20 is installed on the other side. A plurality of fitting grooves 9 are opened on the upper side of the inner wall of the connecting pipe 2; the separated ends of the plug posts 20 on the left and right sides pass through the support block 17 and are plugged into the inner wall of the fitting groove 9, and the adjacent sides of the elastic members 25 on the left and right sides are installed on the inner wall of the slide groove 24, so that the elastic member 25 is used to push the plug posts 20 to keep plugging in the fitting groove 9 one by one, so that the support block 17 itself vibrates, and the scraper 18 is used to transmit the vibration to the filter plate 13, so as to shake out the impurities blocked in the filter holes of the filter plate 13 and scrape them off by the scraper 18, thereby improving the scraping effect of the scraper 18.

[0042] In the process of the support block 17 driving the scraper 18 to scrape the surface of the filter plate 13, since a plug post 20 is inserted into one side of the support block 17 and is pushed by an elastic member 25, when the support block 17 rotates, the plug post 20 is squeezed and contracted to the inner wall of the slide groove 24, and the elastic member 25 is compressed. When the plug post 20 moves to the inner wall of the next fitting groove 9, it is pushed to reset by the elastic force of the elastic member 25, so that the support block 17 itself vibrates in this process and is transmitted to the filter plate 13 through the scraper 18. When the scraper 18 scrapes the filter plate 13, foreign matter blocked in the filter hole of the filter plate 13 is shaken out and scraped away by the scraper 18, thereby improving the scraping effect of the scraper 18 and reducing the blockage of the pump body 1.

[0043] Embodiment 3: On the basis of embodiment 2, in order to facilitate lubrication of the bearing after cleaning and prevent rust and corrosion, an oil storage tank 22 is provided inside the support block 17 on the side away from the connecting pipe 2, and an oil filling pipe 23 is installed on the top of the oil storage tank 22. The lubricating oil for one-time use is injected into the oil storage tank 22 through the oil filling pipe 23 to prevent the pump body 1 from being placed for a long time, resulting in waste of lubricating oil. The bottom of the oil storage tanks 22 on the left and right sides are both provided with oil outlet grooves 30, and the inner wall of the oil outlet groove 30 is plugged with a piston 32. The piston An output hole 31 is provided in the middle of the oil outlet groove 32, a through groove 34 is provided in the middle of the oil outlet groove 30, and a connecting groove 40 is provided on the bottom wall of the slot 19; the piston 32 is inserted into the top of the through groove 34, the through groove 34 and the connecting groove 40 are vertically arranged and interlinked, and the connecting groove 40 is arranged at the top of the bearing. When the paddle 27 is turned, the connecting block 33 is driven to move synchronously, thereby pulling the piston 32, so that the oil outlet groove 30 maintains interlinkage with the through groove 34 using the output hole 31, and then the lubricating fluid is guided to the top of the bearing through the connecting groove 40 to increase its lubrication.

[0044] The support block 17 is supported first, and the paddle plate 27 on the top thereof is pulled to move on the top of the support block 17, thereby driving the push block 35 to disengage from the bottom of the limiting plate 36 and squeeze the elastic member 28 on the inner wall of the slide groove 29 to the right to compress it. At this time, the connecting block 33 synchronously drives the piston 32 to slide along the inner wall of the oil outlet groove 30, thereby using the output hole 31 to keep the oil outlet groove 30 and the through groove 34 connected, and then the lubricating oil in the oil storage tank 22 is transported to the top of the bearing through the connecting groove 40 to increase its lubricity after cleaning and prevent it from rusting. After the oil is replenished, the paddle plate 27 is released, so that it is pushed to reset by the elastic force of the elastic member 28, thereby driving the push block 35 to continue to push the limiting plate 36 to keep it plugged with the top of the slot 19. At this time, the support block 17 can be released, and when replenishing oil into the oil storage tank 22, the lubricating oil used once can be replenished through the oil filling pipe 23 to prevent it from being wasted.

[0045] Embodiment 4: On the basis of embodiment 3, in order to facilitate the disassembly and assembly of the support block 17 and synchronously drive the piston 32 to move, a second slide groove 29 is provided inside the adjacent side of the left and right support blocks 17, a push block 35 is installed on the inner wall of the second slide groove 29, a dial plate 27 is installed on the top of the push block 35, an elastic member 28 is installed on the separated side of the left and right push blocks 35, a connecting block 33 is installed on the bottom of the push block 35, a limiting plate 36 is plugged into the adjacent side of the left and right support blocks 17, a connecting plate 37 is installed on the front and rear sides of the limiting plate 36, an elastic member 38 is installed on the bottom of the connecting plate 37, and two slide grooves 39 are provided inside the side of the support block 17 away from the connecting pipe 2; the separated side of the elastic member 28 on the left and right sides is installed on the inner wall of the second slide groove 29, the dial plate 27 is plugged into the top of the support block 17, and the dial plate 27 pushes the top of the second slide groove 29 The bottom of the restricting plate 36 is blocked to prevent impurities from entering its interior and making it unusable. The operator can drive it to open by toggling the dial plate 27 to the right. The connecting block 33 is installed between the piston 32, and the connecting block 33 runs through the oil outlet groove 30, so that when replenishing lubrication, the dial plate 27 can be synchronously toggled; the connecting plate 37 is slidably connected to the inner wall of the slide groove 39, and the bottom of the elastic member 38 is installed on the bottom wall of the slide groove 39, so that when the push block 35 releases the push against the limiting plate 36, it is pulled back by the elastic force of the elastic member 38 to release the restriction between the support block 17 and the slot 19, so as to facilitate its removal, and the lower part of the limiting plate 36 is in contact with the push block 35, and the top of the limiting plate 36 is plugged into the inner top wall of the slot 19, so that the push block 35 is kept in contact with the bottom of the limiting plate 36, so that it is kept plugged with the inner top wall of the slot 19, thereby facilitating the later disassembly and maintenance.

[0046] When cleaning and maintaining the parts inside the pump body 1, first remove the connecting pipe 2 and the pump body 1, so that the fitting block 7 at the top of the connecting shaft 6 is disengaged from the fitting groove 5, and then the connecting shaft 6 can be pulled upward to drive the plug-in blocks 10 on both sides of the filter plate 13 to disengage from the plug-in groove 8. At the same time, the insertion blocks 14 at the four corners of the cross knife group 15 will disengage from the insertion groove 12. At this time, the supporting block 17 of the connecting shaft 6, the filter plate 13 and the cross knife group 15 can be disengaged from the connecting pipe 2, and then maintenance can be carried out. First, the paddle plate 27 is driven to squeeze the elastic member 28. The elastic force of the elastic member 38 pulls the connecting plate 37 to slide downward along the inner wall of the slide groove 39, thereby driving the limiting plate 36 to shrink and reset downward, and then the supporting block 17 can be pulled to drive the two positioning plates 21 at its bottom to disengage from the slot 19, so as to facilitate its removal for maintenance.

[0047] Embodiment 5: On the basis of embodiment 4, in order to facilitate the replacement of the cross blade group 15, insertion blocks 14 are installed at the four corners of the cross blade group 15, and a plurality of insertion grooves 12 are opened on the top of the support frame 4. The insertion blocks 14 are inserted into the inner walls of the insertion grooves 12. The middle part of the cross blade group 15 is inserted into the bottom end of the connecting shaft 6. A plurality of fixing screws 16 are inserted into the bottom of the connecting shaft 6. The fixing screws 16 pass through the connecting shaft 6 and are threadedly connected to the middle part of the cross blade group 15.

[0048] When the cross blade set 15 needs to be replaced, the four fixing screws 16 are unscrewed, and then the cross blade set 15 is pulled downward to allow the middle part to be separated from the bottom end of the connecting shaft 6, and then it can be replaced. After completion, the replaced cross blade set 15 is reset and assembled between it and the bottom end of the connecting shaft 6 using the four fixing screws 16 for subsequent maintenance and use, thereby improving the use effect of the pump body 1.

[0049] Embodiment 6: Based on Embodiment 5, a method for using a multi-stage anti-clogging sewage pump is proposed, and the method comprises the following steps:

[0050] Step 1, first start the pump body 1, drive the impeller 3 to transport sewage, because the connecting shaft 6 is inserted into the bottom of the impeller 3 through the fitting block 7, thereby synchronously driving the connecting shaft 6 to rotate, at this time, because the connecting shaft 6 is connected to the filter plate 13 through the bearing, and the filter plate 13 is plugged into the plug-in blocks 10 on both sides and the plug-in slots 8, so that the connecting shaft 6 drives the cross blade group 15 to rotate, and at the same time drives the bottom support frame 4 to rotate, thereby driving the crushing blade 11 to rotate synchronously, and the crushing blade 11 is used to crush the foreign matter on the inner wall of the connecting pipe 2, and at the same time, when filtering through the filter plate 13, the cross blade group 15 is used to crush the larger foreign matter filtered out again, thereby realizing multi-stage crushing and preventing the pump body 1 from being blocked. In this process, since the support blocks 17 are plugged into the lower sides of the connecting shaft 6, and the scraper 18 is installed at the bottom of the support block 17, the scraper 18 is synchronously driven to scrape the surface of the filter plate 13, reducing the residual foreign matter after crushing, thereby improving the scraping effect;

[0051] Step 2: During the process of the support block 17 driving the scraper 18 to scrape the surface of the filter plate 13, since a plug post 20 is inserted into one side of the support block 17 and is pushed by the elastic member 25, when the support block 17 rotates, the plug post 20 is squeezed and pushed to the inner wall of the slide groove 24, and the elastic member 25 is compressed. When the plug post 20 moves to the inner wall of the next fitting groove 9, it is pushed to reset by the elastic force of the elastic member 25, so that the support block 17 itself vibrates in this process and is transmitted to the filter plate 13 through the scraper 18. When the scraper 18 scrapes the filter plate 13, foreign matter blocked in the filter hole of the filter plate 13 is shaken out and scraped away by the scraper 18, thereby improving the scraping effect of the scraper 18 and reducing the blockage of the pump body 1.

[0052] Step 3: When cleaning and maintaining the parts inside the pump body 1, first remove the connecting pipe 2 from the pump body 1, so that the fitting block 7 at the top of the connecting shaft 6 is separated from the fitting groove 5, and then the connecting shaft 6 can be pulled upward to drive the plug-in blocks 10 on both sides of the filter plate 13 to be separated from the plug-in groove 8. At the same time, the insertion blocks 14 at the four corners of the cross knife group 15 will be separated from the insertion groove 12. At this time, the supporting block 17 of the connecting shaft 6, the filter plate 13 and the cross knife group 15 can be separated from the connecting pipe 2, and then maintenance can be carried out. At the same time, support the supporting block 17 and pull the dial plate 27 on its top to move on the top of the supporting block 17, thereby driving the push block 35 to be separated from the bottom of the limiting plate 36 and squeezing the elastic inner wall of the slide groove 29 to the right. Component 28 is compressed. At this time, the connecting block 33 synchronously drives the piston 32 to slide along the inner wall of the oil outlet groove 30, so that the oil outlet groove 30 and the through groove 34 are connected by the output hole 31, and the lubricating oil in the oil storage tank 22 is transported to the top of the bearing by the connecting groove 40 to increase its lubricity after cleaning and prevent it from rusting. After the oil is replenished, the paddle plate 27 is released, so that it is pushed to reset by the elastic force of the elastic component 28, and then the push block 35 is driven to continue to push the limiting plate 36 to keep it plugged with the top of the slot 19. At this time, the support block 17 can be released, and when replenishing the oil into the oil storage tank 22, the lubricating oil used once can be replenished through the oil filling pipe 23 to prevent it from being wasted;

[0053] Step 4: When the support block 17 is disassembled, the paddle plate 27 is moved to drive it to squeeze the elastic member 28, and the elastic force of the elastic member 38 pulls the connecting plate 37 to slide downward along the inner wall of the slide groove 39, thereby driving the limiting plate 36 to shrink downward and reset, and then the support block 17 can be pulled to drive the two positioning plates 21 at the bottom thereof to disengage from the slot 19, so as to facilitate its removal for maintenance;

[0054] Step 5. When the cross blade set 15 needs to be replaced, the four fixing screws 16 are unscrewed, and then the cross blade set 15 is pulled downward to allow the middle part to be separated from the bottom end of the connecting shaft 6, and then it can be replaced. After completion, the replaced cross blade set 15 is reset and assembled between it and the bottom end of the connecting shaft 6 using the four fixing screws 16 for subsequent maintenance and use, thereby improving the use effect of the pump body 1.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage anti-clogging sewage pump, comprising a pump body (1), a connecting pipe (2), an impeller (3), a supporting frame (4), a crushing knife (11) and a cross knife group (15), characterized in that: The inner wall of the connecting pipe (2) is provided with a plug-in groove (8) on both sides, a filter plate (13) is plugged into the upper side of the inner wall of the connecting pipe (2), and plug-in blocks (10) are installed on both sides of the filter plate (13), and the plug-in blocks (10) are plugged into the bottom of the inner wall of the plug-in groove (8). The middle part of the supporting frame (4) is connected to a connecting shaft (6) via a bearing, and a fitting block (7) is installed on the top of the connecting shaft (6). The bottom of the impeller (3) is provided with a fitting groove (5), and the fitting block (7) is installed on the top of the impeller (3). The block (7) is inserted into the inner wall of the fitting groove (5), the left and right sides of the connecting shaft (6) are provided with slots (19), the inner wall of the slot (19) is inserted with a support block (17), the bottom of the support block (17) away from the connecting pipe (2) is equipped with two positioning plates (21), the positioning plates (21) are inserted into the bottom of the inner wall of the slot (19), the bottom of the support block (17) is equipped with a scraper (18), the bottom of the scraper (18) is in contact with the top of the filter plate (13).

2. A multi-stage anti-clogging sewage pump according to claim 1, characterized in that: A slide groove (24) is provided inside the support block (17) on one side close to the connecting tube (2); a limit plate (26) is installed on the inner wall of the slide groove (24); an elastic member (25) is installed on one side of the limit plate (26), and a plug column (20) is installed on the other side; and a plurality of fitting grooves (9) are provided on the upper side of the inner wall of the connecting tube (2).

3. A multi-stage anti-clogging sewage pump according to claim 2, characterized in that: The separated ends of the plug posts (20) on the left and right sides penetrate the support block (17) and are inserted into the inner wall of the fitting groove (9), and the adjacent sides of the elastic members (25) on the left and right sides are installed on the inner wall of the slide groove (24).

4. A multi-stage anti-clogging sewage pump according to claim 1, characterized in that: An oil storage tank (22) is provided inside the support block (17) at a side away from the connecting pipe (2), an oil filling pipe (23) is installed on the top of the oil storage tank (22), and oil outlet tanks (30) are provided on the sides close to the bottom of the left and right oil storage tanks (22), a piston (32) is inserted into the inner wall of the oil outlet tank (30), an output hole (31) is provided in the middle of the piston (32), a through groove (34) is provided in the middle of the oil outlet tank (30), and a connecting groove (40) is provided on the bottom wall of the slot (19).

5. A multi-stage anti-clogging sewage pump according to claim 4, characterized in that: The piston (32) is inserted into the top end of the through groove (34); the through groove (34) and the connecting groove (40) are arranged vertically and intersecting with each other; and the connecting groove (40) is arranged on the top of the bearing.

6. A multi-stage anti-clogging sewage pump according to claim 1, characterized in that: A second slide groove (29) is provided inside the adjacent side of the support blocks (17) on the left and right sides, a push block (35) is installed on the inner wall of the second slide groove (29), a dial plate (27) is installed on the top of the push block (35), an elastic member (28) is installed on the separated side of the push blocks (35) on the left and right sides, a connecting block (33) is installed on the bottom of the push block (35), a limiting plate (36) is inserted into the adjacent side of the support blocks (17) on the left and right sides, a connecting plate (37) is installed on the front and rear sides of the limiting plate (36), an elastic member (38) is installed on the bottom of the connecting plate (37), and two slide grooves (39) are provided inside the side of the support block (17) away from the connecting pipe (2).

7. A multi-stage anti-clogging sewage pump according to claim 6, characterized in that: The separated sides of the elastic member 2 (28) on the left and right sides are both installed on the inner wall of the slide groove 2 (29), the shift plate (27) is plugged into the top of the support block (17), and is installed between the connecting block (33) and the piston (32), and the connecting block (33) passes through the oil outlet groove (30).

8. A multi-stage anti-clogging sewage pump according to claim 6, characterized in that: The connecting plate (37) is slidably connected to the inner wall of the slide groove three (39), the bottom of the elastic member three (38) is installed on the bottom wall of the slide groove three (39), the lower part of the limiting plate (36) is fitted between the push block (35), and the top of the limiting plate (36) is inserted into the inner top wall of the slot (19).

9. The multi-stage anti-clogging sewage pump according to claim 1, characterized in that: Insertion blocks (14) are installed at the four corners of the cross blade assembly (15); a plurality of insertion slots (12) are provided at the top of the support frame (4); the insertion blocks (14) are plugged into the inner walls of the insertion slots (12); the middle of the cross blade assembly (15) is plugged into the bottom end of the connecting shaft (6); a plurality of fixing screws (16) are plugged into the bottom of the connecting shaft (6); the fixing screws (16) penetrate the connecting shaft (6) and are threadedly connected to the middle of the cross blade assembly (15).

10. The multi-stage anti-clogging sewage pump according to claim 1, characterized in that: The support blocks (17) on the left and right sides are symmetrically arranged, and the filter plate (13) is arranged on the top of the cross knife group (15).

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