阅读说明：本技术 一种具有高自吸性能的排污泵 (Dredge pump with high self-priming performance ) 是由 曹珠明 曲昌平 孙才军 于 2020-06-16 设计创作，主要内容包括：本发明公开了一种具有高自吸性能的排污泵,包括安装底板,所述安装底板的上方设置有泵轴安装座,泵轴安装座的内侧安装有泵轴,泵轴位于泵壳内侧的一端设置有叶轮轴,叶轮轴上固定安装有叶轮,叶轮包括第一叶轮板、第二叶轮板,第一叶轮板的一侧表面固定安装有若干个第一叶片,第一叶轮板、第二叶轮板之间设置有若干个第二叶片,第一叶轮板上开设有若干个弧形通孔；本发明的排污泵自吸性能强,两组叶片来进行排污,排污流量大,工作效率高,通过在弹簧安装环一、弹簧安装环二之间设置弹簧进行缓冲,避免叶轮直接承受液体的冲击,保证了叶轮的安全,从而保证了该排污泵的使用寿命。(The invention discloses a sewage pump with high self-absorption performance, which comprises an installation bottom plate, wherein a pump shaft installation seat is arranged above the installation bottom plate, a pump shaft is arranged on the inner side of the pump shaft installation seat, an impeller shaft is arranged at one end, positioned on the inner side of a pump shell, of the pump shaft, an impeller is fixedly arranged on the impeller shaft, the impeller comprises a first impeller plate and a second impeller plate, a plurality of first blades are fixedly arranged on the surface of one side of the first impeller plate, a plurality of second blades are arranged between the first impeller plate and the second impeller plate, and a plurality of arc-shaped through holes are formed in the first impeller plate; the sewage pump has strong self-absorption performance, the two groups of blades are used for sewage discharge, the sewage discharge flow is large, the working efficiency is high, the spring is arranged between the first spring mounting ring and the second spring mounting ring for buffering, the impeller is prevented from directly bearing the impact of liquid, the safety of the impeller is ensured, and the service life of the sewage pump is further ensured.)

1. The dredge pump with the high self-absorption performance is characterized by comprising a mounting base plate (1), wherein a pump shaft mounting seat (2) is arranged above the mounting base plate (1), a supporting leg (12) is fixedly connected to the bottom of the pump shaft mounting seat (2), the bottom of the supporting leg (12) is fixedly connected with the upper surface of the mounting base plate (1) through a bolt, a pump shaft (7) is mounted on the inner side of the pump shaft mounting seat (2), the pump shaft (7) is rotatably connected with the pump shaft mounting seat (2) through a bearing (14), a sealing plate (13) is fixedly mounted at one end of the pump shaft mounting seat (2) through a bolt, the sealing plate (13) is fixedly mounted on a connecting sleeve (11), the connecting sleeve (11) is sleeved on the pump shaft (7), a pump shell (3) is fixedly mounted at one side of the sealing plate (13) through a bolt, and the pump shell (3) is fixed with the top of the pump shaft mounting seat (, one end of the pump shaft (7) extends to the inner side of the pump shell (3), an impeller shaft (17) is arranged at one end, located on the inner side of the pump shell (3), of the pump shaft (7), an impeller (4) is fixedly mounted on the impeller shaft (17), a motor cushion seat (10) is fixedly mounted at one end, away from the pump shaft mounting seat (2), of the upper surface of the mounting base plate (1), a driving motor (9) is fixedly mounted on the upper surface of the motor cushion seat (10), and the output shaft end of the driving motor (9) is fixedly connected with the other end of the pump shaft (7) through a coupling (8);

a feeding pipe orifice (5) is fixedly connected to one side of the pump shell (3) far away from the pump shaft mounting seat (2), and a discharging pipe orifice (6) is fixedly connected to the top of the pump shell (3);

the impeller (4) comprises a first impeller plate (41) and a second impeller plate (43), a plurality of first blades (42) are fixedly arranged on the surface of one side of the first impeller plate (41) close to the feeding pipe orifice (5), a second impeller plate (43) is arranged on the other side of the first impeller plate (41), a plurality of second blades (44) are arranged between the first impeller plate (41) and the second impeller plate (43), two sides of the second blade (44) are respectively fixedly connected with the opposite surfaces of the first impeller plate (41) and the second impeller plate (43), the first blades (42) correspond to the second blades (44) one by one, a plurality of arc-shaped through holes (410) are arranged on the first impeller plate (41), a flow guide bulge (45) is arranged at the center of the surface of one side of the first impeller plate (41) provided with the first blade (42).

2. A dredge pump with high self-priming performance according to claim 1, one end of the peripheral surface of the impeller shaft (17) far away from the impeller (4) is sleeved with a first spring mounting ring (19), one end of the peripheral surface of the impeller shaft (17) far away from the impeller (4) is provided with an annular groove (173), the first spring mounting ring (19) is fixedly arranged in the annular groove (173), the second spring mounting ring (20) is fixedly sleeved on the pump shaft (7), a spring (18) is arranged between the first spring mounting ring (19) and the second spring mounting ring (20), the spring (18) is sleeved on the pump shaft (7), the pump shaft (7) is also sleeved and fixed with a fixed ring (21), one end of the second spring mounting ring (20) is abutted and fixed with one end of the fixed ring (21), the other end of the fixing ring (21) is fixedly connected with the inner wall of one side of the connecting sleeve (11) in an abutting mode.

3. The dredge pump with high self-priming performance according to claim 1, characterized in that the impeller shaft (17) comprises a connecting main shaft (171) and a mounting sleeve shaft (172), one end of the connecting main shaft (171) is fixedly connected with the impeller (4), one end of the outer peripheral surface of the connecting main shaft (171) far away from the impeller (4) is fixedly provided with a first flange (174), one end of the outer peripheral surface of the mounting sleeve shaft (172) is fixedly provided with a second flange (175), the first flange (174) and the second flange (175) are fixedly connected through bolts, one end of the outer peripheral surface of the mounting sleeve shaft (172) far away from the connecting main shaft (171) is provided with an annular groove (173), one end of the connecting main shaft (171) near the mounting sleeve shaft (172) is provided with a pump shaft mounting hole I (1711), the inner side of the connecting main shaft (171) is provided with two strip chutes (1712), two bar spout (1712) are the symmetric distribution on the inner peripheral surface of pump shaft mounting hole (1711), the one end through connection main shaft (171) of bar spout (1712) paste the one end terminal surface of installing sleeve axle (172), pump shaft mounting hole two (1721) have been seted up on installing sleeve axle (172), pump shaft mounting hole two (1721) run through the both ends terminal surface of installing sleeve axle (172).

4. The dredge pump with high self-priming performance according to claim 1, characterized in that one end of the pump shaft (7) is installed inside the first pump shaft mounting hole (1711), and two strip-shaped protruding ribs (22) are fixedly installed on the outer circumferential surface of the pump shaft (7) inside the first pump shaft mounting hole (1711), the two strip-shaped protruding ribs (22) are symmetrically distributed on the outer circumferential surface of the pump shaft (7), the two strip-shaped protruding ribs (22) are respectively in one-to-one correspondence with the two strip-shaped sliding grooves (1712), and the strip-shaped protruding ribs (22) are slidably disposed in the corresponding strip-shaped sliding grooves (1712).

5. A dredge pump with high self-priming performance according to claim 1, characterized in that the first impeller plate (41) and the second impeller plate (43) are parallel to each other, and the first impeller plate (41) and the second impeller plate (43) are arranged coaxially.

6. The dredge pump with high self-priming performance of claim 1, characterized in that, a plurality of the first vanes (42) are distributed in a circular array with equal radian on one side surface of the first impeller plate (41), a plurality of the arc through holes (410) are distributed in a circular array with equal radian on the first impeller plate (41), and the arc through holes (410) are located between two adjacent first vanes (42).

7. A dredge pump with high self-priming performance according to claim 1, characterized in that the second vane (44) is distributed in a circular array with equal radian on one side surface of the second impeller plate (43).

8. The dredge pump with high self-priming performance according to claim 1, characterized in that, the inboard of pump shaft mount pad (2) is provided with oil storage chamber (201), the inboard fixed mounting of pump shaft mount pad (2) has two bearings (14), bearing (14) are located the both ends of oil storage chamber (201), two one side that oil storage chamber (201) was kept away from in bearing (14) is provided with first bearing lid (15), second bearing lid (16) respectively, first bearing lid (15), second bearing lid (16) are respectively through bolt and pump shaft mount pad (2) fixed connection.

9. The dredge pump with high self-priming performance according to claim 1, characterized in that the operation steps of the dredge pump are:

the driving motor (9) is started, an output shaft of the driving motor (9) rotates and drives the pump shaft (7) to rotate, the pump shaft (7) drives the impeller (4) to rotate, liquid enters from the feeding pipe orifice (5), the first blade (42) rotates and drives a part of liquid entering the pump shell (3) to rotate and throws a part of liquid out of the discharging pipe orifice (6), the impeller (4) rotates and the other part of liquid flows into the space between the first impeller plate (41) and the second impeller plate (43) through the arc-shaped through hole (410), due to the limitation of the flow passing through the arc-shaped through hole (410), the pressure between the first impeller plate (41) and the second impeller plate (43) is smaller than the pressure on one side of the first blade (42), the first impeller plate (41) and the second impeller plate (43) form negative pressure, the liquid entering the pump shell (3) moves towards the impeller (4) at an accelerated speed under the action of the negative pressure, the liquid can impact the impeller (4) and push the impeller to move to one side far away from the feeding pipe orifice (5), at the moment, the spring (18) between the first spring mounting ring (19) and the second spring mounting ring (20) buffers the impeller (4), and the second blade (44) drives the other part of liquid between the first impeller plate (41) and the second impeller plate (43) to rotate and throws the other part of liquid out of the discharging pipe orifice (6).

Technical Field

The invention relates to a sewage pump, in particular to a sewage pump with high self-absorption performance.

Background

In a sewage treatment system, a sewage pump is a transmission tool which is widely applied. The sewage pump is a pump product which is connected with a motor and simultaneously submerged in liquid to work, and compared with a common horizontal pump or a vertical sewage pump, the sewage pump has compact structure and small occupied area;

patent document (CN108644122A) discloses a novel dredge pump, which adopts a traditional impeller structure, has poor self-priming capability, only has a single group of blades, has small sewage discharge flow and low working efficiency, and easily receives liquid impact during working, thereby shortening the service life of the dredge pump.

Disclosure of Invention

The invention aims to provide a sewage pump with high self-priming performance, wherein a plurality of first blades are arranged on the surface of one side of a first impeller plate to drive liquid entering a pump shell to rotate, a second impeller plate is arranged on the other side of the first impeller plate, an arc-shaped through hole is formed in the first impeller plate at a position between two adjacent first blades, so that the liquid enters a space between the first impeller plate and the second impeller plate through the arc-shaped through hole, a plurality of second blades are arranged between the first impeller plate and the second impeller plate to drive the liquid entering the space between the first impeller plate and the second impeller plate to rotate, the pressure between the first impeller plate and the second impeller plate is smaller than the pressure on one side of the first blades due to the limitation of flow passing through the arc-shaped through hole, the first impeller plate and the second impeller plate form negative pressure, the liquid entering the pump shell is accelerated to move towards the impeller direction under the action of the negative pressure, the self-absorption performance is improved, and the technical problem that the self-absorption capacity of the traditional sewage pump is poor is solved;

the impeller is provided with the first impeller plate and the second impeller plate, the first impeller plate is provided with the first blades, the second impeller plate is provided with the second blades, and the two groups of blades are used for discharging sewage;

according to the invention, the first spring mounting ring is sleeved at one end of the outer peripheral surface of the impeller shaft, which is far away from the impeller, the second spring mounting ring is sleeved on the pump shaft, the spring is sleeved on the pump shaft between the first spring mounting ring and the second spring mounting ring, the two strip-shaped sliding grooves are formed in the inner side of the connecting main shaft, when one end of the pump shaft is arranged at the inner side of the first pump shaft mounting hole, the two strip-shaped convex edges on the outer peripheral surface of the pump shaft, which is positioned at the inner side of the first pump shaft mounting hole, are respectively arranged in the two strip-shaped sliding grooves in a sliding manner, when the driving motor drives the impeller to rotate when the sewage pump works, and liquid passes through the feeding pipe orifice, under the suction effect of the impeller in the invention, the liquid can impact on the impeller and push the impeller to move towards one side far away from the feeding pipe orifice, at, the safety of the impeller is guaranteed, the service life of the sewage pump is guaranteed, and the technical problem that the impeller of the traditional sewage pump is easily damaged by impact and the service life of the sewage pump is influenced is solved.

The purpose of the invention can be realized by the following technical scheme:

a dredge pump with high self-priming performance comprises a mounting base plate, wherein a pump shaft mounting seat is arranged above the mounting base plate, supporting legs are fixedly connected to the bottom of the pump shaft mounting seat, the bottom of each supporting leg is fixedly connected with the upper surface of the mounting base plate through a bolt, a pump shaft is mounted on the inner side of the pump shaft mounting seat and rotatably connected with the pump shaft mounting seat through a bearing, a sealing plate is fixedly mounted at one end of the pump shaft mounting seat through a bolt, the sealing plate is fixedly mounted on a connecting sleeve, the connecting sleeve is sleeved on the pump shaft, a pump shell is fixedly mounted at one side of the sealing plate through a bolt, the pump shell is fixed with the top of the pump shaft mounting seat through a bolt, one end of the pump shaft extends to the inner side of the pump shell, an impeller shaft is arranged at one end of the pump shaft, a motor cushion seat is fixedly arranged at one end of the upper surface of the mounting bottom plate, which is far away from the pump shaft mounting seat, a driving motor is fixedly arranged on the upper surface of the motor cushion seat, and the output shaft end of the driving motor is fixedly connected with the other end of the pump shaft through a coupling;

a feeding pipe orifice is fixedly connected to one side of the pump shell, which is far away from the pump shaft mounting seat, and a discharging pipe orifice is fixedly connected to the top of the pump shell;

the impeller includes first impeller plate, second impeller plate, first impeller plate is close to feeding orificial one side fixed surface and installs the first blade of a plurality of, the opposite side of first impeller plate is provided with the second impeller plate, be provided with a plurality of second blade between first impeller plate, the second impeller plate, the both sides of second blade respectively with the opposite face fixed connection of first impeller plate, second impeller plate, a plurality of first blade and a plurality of second blade one-to-one, a plurality of arc through-hole has been seted up on the first impeller plate, the central point department of putting of one side surface that first blade was installed to first impeller plate puts and is provided with the water conservancy diversion arch.

Further, the one end that the impeller was kept away from to the impeller shaft outer peripheral face has cup jointed spring mount ring one, the one end that the impeller was kept away from to the impeller shaft outer peripheral face has seted up the annular groove, spring mount ring one fixed mounting is in the annular groove, cup joint on the pump shaft and be fixed with spring mount ring two, be provided with the spring between spring mount ring one, the spring mount ring two, the spring housing is established on the pump shaft, still cup joint on the pump shaft and be fixed with solid fixed ring, the one end of spring mount ring two is fixed with solid fixed ring's one end butt, gu fixed ring's the other end is fixed with one side inner wall butt of adapter sleeve.

Further, the impeller shaft comprises a connecting main shaft and a mounting sleeve shaft, one end of the connecting main shaft is fixedly connected with the impeller, a first flange is fixedly arranged at one end of the outer peripheral surface of the connecting main shaft, which is far away from the impeller, a second flange is fixedly arranged on the outer peripheral surface of one end of the mounting sleeve shaft, the first flange and the second flange are fixedly connected through bolts, an annular groove is arranged on the outer peripheral surface of one end of the mounting sleeve shaft away from the connecting main shaft, one end of the connecting main shaft, which is close to the mounting sleeve shaft, is provided with a first pump shaft mounting hole, the inner side of the connecting main shaft is provided with two strip-shaped sliding chutes which are symmetrically distributed on the inner circumferential surface of the first pump shaft mounting hole, one end of the strip-shaped sliding groove is in penetrating connection with one end face, attached to the mounting sleeve shaft, of the main shaft, a second pump shaft mounting hole is formed in the mounting sleeve shaft, and the second pump shaft mounting hole penetrates through the end faces of the two ends of the mounting sleeve shaft.

Furthermore, the one end of pump shaft is installed in the inboard of pump shaft mounting hole one, and is located fixed mounting two bar beads on the pump shaft outer peripheral face of pump shaft mounting hole one inboard, two the bar bead is the symmetric distribution on the outer peripheral face of pump shaft, two the bar bead respectively with two bar spout one-to-one, just the bar bead slides and sets up in corresponding bar spout.

Furthermore, the first impeller plate and the second impeller plate are parallel to each other, and the first impeller plate and the second impeller plate are coaxially arranged.

Furthermore, a plurality of first blades are distributed on the surface of one side of the first impeller plate in an equal-radian circular array, a plurality of arc-shaped through holes are distributed on the first impeller plate in an equal-radian circular array, and the arc-shaped through holes are positioned between every two adjacent first blades.

Furthermore, the second blades are distributed on the surface of one side of the second impeller plate in an equal-radian circular array.

Further, the inboard of pump shaft mount pad is provided with the oil storage chamber, the inboard fixed mounting of pump shaft mount pad has two bearings, the bearing is located the both ends in oil storage chamber, two one side that the oil storage chamber was kept away from to the bearing is provided with first bearing lid, second bearing lid respectively, first bearing lid, second bearing lid are respectively through bolt and pump shaft mount pad fixed connection.

Further, the working steps of the sewage pump are as follows:

the driving motor is started, an output shaft of the driving motor rotates and drives a pump shaft to rotate, the pump shaft drives an impeller to rotate, liquid enters from a feeding pipe orifice, a first blade rotates and drives a part of liquid entering a pump shell to rotate and throws a part of liquid out of a discharging pipe orifice, the impeller rotates and simultaneously flows the other part of liquid into a space between a first impeller plate and a second impeller plate through an arc-shaped through hole, the pressure between the first impeller plate and the second impeller plate is smaller than the pressure on one side of the first blade due to the limitation of the flow passing through the arc-shaped through hole, the first impeller plate and the second impeller plate form negative pressure, the liquid entering the pump shell moves towards the impeller in an accelerating way under the action of the negative pressure, the liquid can impact the impeller and pushes the impeller to move towards one side far away from the feeding pipe orifice, and at the moment, a spring between a first spring mounting ring and a second spring mounting ring buffers the impeller, the second blade drives the other part of liquid between the first impeller plate and the second impeller plate to rotate and throws the other part of liquid out of the discharge pipe orifice.

The invention has the beneficial effects that:

the invention drives the liquid entering the pump shell to rotate by installing a plurality of first blades on the surface of one side of the first impeller plate, and the second impeller plate is arranged on the other side of the first impeller plate, an arc-shaped through hole is formed in the first impeller plate at the position between two adjacent first blades, so that liquid enters the space between the first impeller plate and the second impeller plate through the arc-shaped through hole, a plurality of second blades are arranged between the first impeller plate and the second impeller plate to drive the liquid entering between the first impeller plate and the second impeller plate to rotate, because the flow passing through the arc-shaped through hole is limited, the pressure between the first impeller plate and the second impeller plate is smaller than the pressure on one side of the first blade, the first impeller plate and the second impeller plate form negative pressure, and the liquid entering the pump shell moves towards the impeller in an accelerating manner under the action of the negative pressure, so that the sewage pump has strong self-priming performance;

the impeller is provided with the first impeller plate and the second impeller plate, the first impeller plate is provided with the plurality of first blades, and the second impeller plate is provided with the plurality of second blades;

according to the invention, the first spring mounting ring is sleeved at one end of the outer peripheral surface of the impeller shaft, which is far away from the impeller, the second spring mounting ring is sleeved on the pump shaft, the spring is sleeved on the pump shaft between the first spring mounting ring and the second spring mounting ring, the two strip-shaped sliding grooves are formed in the inner side of the connecting main shaft, when one end of the pump shaft is arranged at the inner side of the first pump shaft mounting hole, the two strip-shaped convex edges on the outer peripheral surface of the pump shaft, which is positioned at the inner side of the first pump shaft mounting hole, are respectively arranged in the two strip-shaped sliding grooves in a sliding manner, when the driving motor drives the impeller to rotate when the sewage pump works, and liquid passes through the feeding pipe orifice, under the suction effect of the impeller in the invention, the liquid can impact on the impeller and push the impeller to move towards one side far away from the feeding pipe orifice, at, the safety of the impeller is ensured, and the service life of the sewage pump is ensured.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a dredge pump with high self-priming performance according to the present invention;

FIG. 2 is a perspective view of an impeller according to the present invention;

FIG. 3 is an enlarged view of A in FIG. 1;

fig. 4 is a partial cross-sectional view of the impeller shaft of the present invention.

In the figure: 1. mounting a bottom plate; 2. a pump shaft mounting seat; 201. an oil storage chamber; 3. a pump housing; 4. an impeller; 41. a first impeller plate; 410. an arc-shaped through hole; 42. a first blade; 43. a second impeller plate; 44. a second blade; 45. a flow guide bulge; 5. a feed tube orifice; 6. a discharge pipe orifice; 7. a pump shaft; 8. a coupling; 9. a drive motor; 10. a motor cushion seat; 11. connecting sleeves; 12. supporting legs; 13. a sealing plate; 14. a bearing; 15. a first bearing cover; 16. a second bearing cover; 17. an impeller shaft; 171. connecting the main shaft; 1711. a first pump shaft mounting hole; 1712. a strip-shaped chute; 172. installing a sleeve shaft; 1721. a second pump shaft mounting hole; 173. an annular groove; 174. a first flange; 175. a second flange; 18. a spring; 19. a first spring mounting ring; 20. a second spring mounting ring; 21. a fixing ring; 22. and (4) strip-shaped convex ribs.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-4, a dredge pump with high self-priming performance comprises a mounting base plate 1, a pump shaft mounting seat 2 is arranged above the mounting base plate 1, a supporting leg 12 is fixedly connected to the bottom of the pump shaft mounting seat 2, the bottom of the supporting leg 12 is fixedly connected to the upper surface of the mounting base plate 1 through a bolt, a pump shaft 7 is mounted on the inner side of the pump shaft mounting seat 2, the pump shaft 7 is rotatably connected to the pump shaft mounting seat 2 through a bearing 14, a sealing plate 13 is fixedly mounted at one end of the pump shaft mounting seat 2 through a bolt, the sealing plate 13 is fixedly mounted on a connecting sleeve 11, the connecting sleeve 11 is sleeved on the pump shaft 7, a pump casing 3 is fixedly mounted at one side of the sealing plate 13 through a bolt, the pump casing 3 is fixed to the top of the pump shaft mounting seat 2 through a bolt, and one end of, an impeller shaft 17 is arranged at one end, located on the inner side of the pump shell 3, of the pump shaft 7, an impeller 4 is fixedly mounted on the impeller shaft 17, a motor cushion seat 10 is fixedly mounted at one end, far away from the pump shaft mounting seat 2, of the upper surface of the mounting base plate 1, a driving motor 9 is fixedly mounted on the upper surface of the motor cushion seat 10, and the output shaft end of the driving motor 9 is fixedly connected with the other end of the pump shaft 7 through a coupling 8;

a feeding pipe orifice 5 is fixedly connected to one side of the pump shell 3, which is far away from the pump shaft mounting seat 2, and a discharging pipe orifice 6 is fixedly connected to the top of the pump shell 3;

impeller 4 includes first impeller plate 41, second impeller plate 43, first impeller plate 41 is close to one side fixed surface of feed pipe mouth 5 and is installed the first blade 42 of a plurality of, the opposite side of first impeller plate 41 is provided with second impeller plate 43, be provided with a plurality of second blade 44 between first impeller plate 41, the second impeller plate 43, the both sides of second blade 44 respectively with the opposite face fixed connection of first impeller plate 41, second impeller plate 43, a plurality of first blade 42 and a plurality of second blade 44 one-to-one, a plurality of arc through-hole 410 has been seted up on first impeller plate 41, the central point department of the side surface that first blade 42 was installed to first impeller plate 41 puts and is provided with water conservancy diversion arch 45.

The one end that impeller 4 was kept away from to impeller shaft 17 outer peripheral face has cup jointed spring mount ring 19, annular groove 173 has been seted up to the one end that impeller 4 was kept away from to impeller shaft 17 outer peripheral face, spring mount ring 19 fixed mounting is in annular groove 173, cup joint on the pump shaft 7 and be fixed with spring mount ring two 20, be provided with spring 18 between spring mount ring 19, the spring mount ring two 20, spring 18 cover is established on the pump shaft 7, still cup joint on the pump shaft 7 and be fixed with solid fixed ring 21, the one end of spring mount ring two 20 is fixed with the one end butt of solid fixed ring 21, the other end of solid fixed ring 21 is fixed with one side inner wall butt of adapter sleeve 11.

The impeller shaft 17 comprises a connecting main shaft 171 and a mounting sleeve shaft 172, one end of the connecting main shaft 171 is fixedly connected with the impeller 4, one end of the outer peripheral surface of the connecting main shaft 171, which is far away from the impeller 4, is fixedly provided with a first flange 174, one end of the outer peripheral surface of the mounting sleeve shaft 172 is fixedly provided with a second flange 175, the first flange 174 and the second flange 175 are fixedly connected through bolts, the outer peripheral surface of one end of the mounting sleeve shaft 172, which is far away from the connecting main shaft 171, is provided with an annular groove 173, one end of the connecting main shaft 171, which is close to the mounting sleeve shaft 172, is provided with a first pump shaft mounting hole 1711, the inner side of the connecting main shaft 171 is provided with two strip-shaped sliding grooves 1712, the two strip-shaped sliding grooves 1712 are symmetrically distributed on the inner peripheral surface of the first pump shaft mounting hole 1711, one end of the strip-shaped sliding grooves 1712 penetrates through the connecting main, the second pump shaft mounting hole 1721 penetrates through the end faces of the two ends of the mounting sleeve shaft 172.

One end of the pump shaft 7 is installed on the inner side of the first pump shaft mounting hole 1711, two strip-shaped protruding edges 22 are fixedly installed on the outer peripheral surface of the pump shaft 7 on the inner side of the first pump shaft mounting hole 1711, the two strip-shaped protruding edges 22 are symmetrically distributed on the outer peripheral surface of the pump shaft 7, the two strip-shaped protruding edges 22 are in one-to-one correspondence with the two strip-shaped sliding grooves 1712, and the strip-shaped protruding edges 22 are arranged in the corresponding strip-shaped sliding grooves 1712 in a sliding mode.

The first impeller plate 41 and the second impeller plate 43 are parallel to each other, and the first impeller plate 41 and the second impeller plate 43 are coaxially arranged.

The first blades 42 are distributed on the surface of one side of the first impeller plate 41 in a circular array with an equal radian, the arc-shaped through holes 410 are distributed on the first impeller plate 41 in a circular array with an equal radian, and the arc-shaped through holes 410 are positioned between two adjacent first blades 42.

The second blades 44 are distributed in a circular array with an equal radian on one side surface of the second impeller plate 43.

The inboard of pump shaft mount pad 2 is provided with oil storage chamber 201, the inboard fixed mounting of pump shaft mount pad 2 has two bearings 14, bearing 14 is located the both ends of oil storage chamber 201, two one side that oil storage chamber 201 was kept away from to bearing 14 is provided with first bearing cover 15, second bearing cover 16 respectively, first bearing cover 15, second bearing cover 16 are respectively through bolt and pump shaft mount pad 2 fixed connection.

The working steps of the sewage pump are as follows:

the driving motor 9 is started, the output shaft of the driving motor 9 rotates and drives the pump shaft 7 to rotate, the pump shaft 7 drives the impeller 4 to rotate, liquid enters from the feeding pipe orifice 5, the first blade 42 rotates and drives a part of liquid entering the pump shell 3 to rotate and throws a part of liquid out of the discharging pipe orifice 6, the impeller 4 rotates and simultaneously another part of liquid flows into the space between the first impeller plate 41 and the second impeller plate 43 through the arc-shaped through hole 410, because the flow passing through the arc-shaped through hole 410 is limited, the pressure between the first impeller plate 41 and the second impeller plate 43 is smaller than the pressure at one side of the first blade 42, the first impeller plate 41 and the second impeller plate 43 form negative pressure, the liquid entering the pump shell 3 moves towards the impeller 4 at an acceleration under the action of the negative pressure, the liquid impacts the impeller 4 and pushes the liquid to move towards the side far away from the feeding pipe orifice 5, the spring 18 between the first spring mounting ring 19 and the second spring mounting ring 20 cushions the impeller 4, and the second blade 44 drives another part of liquid between the first impeller plate 41 and the second impeller plate 43 to rotate and throws the other part of liquid out of the discharge pipe orifice 6.

The invention drives the liquid entering the pump shell 3 to rotate by installing a plurality of first blades 42 on one side surface of a first impeller plate 41, drives the liquid entering the pump shell 3 to rotate by arranging a second impeller plate 43 on the other side of the first impeller plate 41, arranging an arc-shaped through hole 410 on the first impeller plate 41 at a position between two adjacent first blades 42 so that the liquid enters between the first impeller plate 41 and the second impeller plate 43 through the arc-shaped through hole 410, drives the liquid entering between the first impeller plate 41 and the second impeller plate 43 to rotate by arranging a plurality of second blades 44 between the first impeller plate 41 and the second impeller plate 43, leads the pressure between the first impeller plate 41 and the second impeller plate 43 to be smaller than the pressure on one side of the first blades 42 due to the limitation of the flow passing through the arc-shaped through hole 410, forms negative pressure on the first impeller plate 41 and the second impeller plate 43, and accelerates the liquid entering the pump shell 3 to move towards the impeller 4 under the action of the negative pressure, the sewage pump has strong self-absorption performance;

the impeller 4 of the invention is provided with a first impeller plate 41 and a second impeller plate 43, a plurality of first blades 42 are arranged on the first impeller plate 41, and a plurality of second blades 44 are arranged on the second impeller plate 43, so that the invention carries out pollution discharge by two groups of blades, the pollution discharge flow is large, and the working efficiency is high;

according to the invention, one end of the outer peripheral surface of the impeller shaft 17, which is far away from the impeller 4, is sleeved with the first spring mounting ring 19, the second spring mounting ring 20 is sleeved on the pump shaft 7, the spring 18 is sleeved on the pump shaft 7 between the first spring mounting ring 19 and the second spring mounting ring 20, two strip-shaped chutes 1712 are formed in the inner side of the connecting main shaft 171, when one end of the pump shaft 7 is installed in the first pump shaft mounting hole 1711, two strip-shaped convex edges 22 on the outer peripheral surface of the pump shaft 7, which is located in the first pump shaft mounting hole 1711, are respectively arranged in the two strip-shaped chutes 1712 in a sliding manner, when the sewage pump works, when the driving motor 9 drives the impeller 4 to rotate, liquid passes through the feeding pipe orifice 5, under the suction effect of the impeller 4, the liquid can impact the impeller 4 and push the impeller to move to one side far away from the feeding pipe orifice 5, and the spring 18 between the first spring mounting ring, the impeller 4 is prevented from directly bearing the impact of liquid, and the safety of the impeller 4 is ensured, so that the service life of the sewage pump is ensured.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.