CN113062872A

CN113062872A - Three-purpose submersible pump

Info

Publication number: CN113062872A
Application number: CN202110459190.3A
Authority: CN
Inventors: 王慧
Original assignee: Suzhou Woda Garden Machinery Co ltd
Current assignee: Suzhou Woda Garden Machinery Co ltd
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2021-07-02

Abstract

The invention relates to a three-purpose submersible pump, wherein a water inlet base of the three-purpose submersible pump comprises a base body and a water blocking disc. The base body comprises a base body, a skirt edge part and an installation boss. The skirt edge part is formed by the continuous downward extension of the bottom wall of the seat body, and M external water inlet gaps are uniformly distributed around the peripheral side wall of the skirt edge part. The water blocking disc is fixed with the mounting boss in a detachable mode and is circumferentially surrounded by the skirt edge portion. The water blocking disc comprises a body and a flanging part which are directly fixed with the mounting boss. The flanging part is formed by continuously extending and upwards turning 90 degrees from the peripheral side wall of the element body, and N built-in water inlet gaps are uniformly distributed around the peripheral side wall. Through carrying out circumference rotation to the dish that blocks water to make the mutual cooperation relation between external breach of intaking and the built-in breach of intaking freely switch between the state of fully opening, partially shelters from the state, shelter from the state completely, and then in order to realize drawing to heavy contaminated water, moderate contaminated water, clean water respectively.

Description

Three-purpose submersible pump

Technical Field

The invention relates to the technical field of water pump manufacturing, in particular to a three-purpose submersible pump.

Background

The submersible pump is an important device for pumping water from a deep well, is wholly submerged in water when working, pumps underground water to the ground surface, is domestic water, mine emergency rescue, industrial cooling, farmland irrigation, seawater lifting, ship load regulation and can also be used for fountain landscape.

It is known that the operation performance of a submersible pump is influenced by several factors such as water quality, water depth and water flow rate, and particularly, the influence of water quality is the greatest. For example: when the particle size of impurities contained in the water to be pumped is larger, the water pumping unit is easy to block, and the abrasion of the impeller assembly in the water pumping unit can be accelerated. As shown in fig. 1, the submersible pump performs water inlet filtration by means of the water inlet holes formed around the side wall of the water inlet base (the size of the water inlet hole diameter directly determines the particle size capable of extracting impurities), and is single in functionality, which means that the submersible pump is only suitable for a specific application scene, and specifically, the submersible pump is divided into a clean water pump, a neutral pump and a sewage pump according to the size of the particles in the water to be extracted, wherein the clean water pump is used for extracting clean water with the particle size of the impurities smaller than 4.5mm, the central pump is used for extracting moderate polluted water with the particle size of the impurities larger than 4.5mm and smaller than 12mm, and the sewage pump is used for extracting severe polluted water with the particle size of the impurities larger than 12 mm. Therefore, when the water quality to be applied is uncertain, customers are required to purchase the clean water pump, the neutral pump and the sewage pump at the same time, which undoubtedly increases the purchase cost greatly. Thus, a skilled person is urgently needed to solve the above problems.

Disclosure of Invention

Therefore, in view of the above-mentioned problems and drawbacks, the present inventors have collected relevant information, evaluated and considered in many ways, and continuously conducted experiments and modifications by technicians with years of research and development experience in this field, which finally resulted in the appearance of the three-way submersible pump.

In order to solve the technical problem, the invention relates to a three-purpose submersible pump which comprises a pump shell, a water outlet joint, a water inlet base and a water pumping unit. Wherein, the water inlet base and the pump shell are mutually butted to form a containing cavity. The water outlet joint is inserted and matched on the pump shell and communicated with the containing cavity. The water pumping unit is also arranged in the accommodating cavity. The water pumping unit comprises a motor and an impeller assembly, and when the water pumping unit is started, water is lifted to the water outlet section through the water inlet base by means of a pressure difference effect. The water inlet base comprises a base body and a water blocking disc. The base body comprises a base body, a skirt edge part and an installation boss. The seat body is directly butted with the pump shell, and a water through hole and a flow passage are formed on the seat body. When the seat body is butted with the pump shell, the flow channel is communicated with the water through hole and the containing cavity at the same time. The skirt edge part is formed by the continuous downward extension of the bottom wall of the seat body, and M external water inlet gaps are uniformly distributed around the peripheral side wall of the skirt edge part. The mounting boss is formed by continuously extending the bottom wall of the seat body downwards. The water blocking disc is fixed with the mounting boss in a detachable mode and is circumferentially surrounded by the skirt edge portion. The water blocking disc comprises a body and a flanging part which are directly fixed with the mounting boss. The flanging part is formed by continuously extending and upwards turning the peripheral side wall of the piece body by 90 degrees, and N built-in water inlet notches are formed around the peripheral side wall of the piece body, wherein N is less than or equal to M. Assuming that the inner diameter of the skirt part is R and the outer diameter of the flanging part is R, R-R is less than or equal to 4.5 mm. And D is less than or equal to 4.5mm on the assumption that the distance between the lower plane of the piece body and the lower plane of the skirt edge part is D. Through carrying out circumference rotation to the dish that blocks water to make the mutual cooperation relation between external breach and the built-in breach of intaking freely switch between complete relative state, partial dislocation state, complete dislocation state.

As a further improvement of the technical scheme of the invention, the water inlet base also comprises a cover plate. After the body is positioned relative to the mounting boss, the cover plate supports the bottom wall of the body and is fixed with the mounting boss by the aid of the screw.

As a further improvement of the technical scheme of the invention, a plurality of mounting columns extend downwards from the bottom wall of the mounting boss. And a threaded hole matched with the screw extends upwards from the bottom wall of the mounting column. The cover plate is provided with connecting through holes which are consistent with the mounting columns in number and are matched with the screws.

As a further improvement of the technical scheme of the invention, a plurality of limiting columns are upwards extended from the top wall of the cover plate opposite to the connecting through hole. And a limiting groove matched with the outer diameter of the mounting column extends downwards from the top wall of the limiting column.

As a further improvement of the technical scheme of the invention, a first hook hanging arm and a second hook hanging arm extend downwards from the bottom wall of the seat body around the water through hole. Correspondingly, a first hook notch matched with the first hook arm and a second hook notch matched with the second hook arm are respectively arranged on the cover plate.

As a further improvement of the technical scheme of the invention, the seat body also comprises a first reinforcing unit. The first reinforcing unit is composed of a plurality of first reinforcing rib plates which are circumferentially and uniformly distributed around the inner side wall of the skirt edge part. The first reinforcing rib plate is formed by downwards extending the bottom wall of the seat body and continuously extends along the radial direction until two end parts of the first reinforcing rib plate respectively abut against the inner side wall of the skirt part and the outer side wall of the mounting boss.

As a further improvement of the technical scheme of the invention, the water-blocking disk also comprises a second reinforcing unit. The second reinforcing unit is composed of a plurality of second reinforcing rib plates which are circumferentially and uniformly distributed around the inner side wall of the flanging part. The second reinforcing rib plate is formed by upward extending the top wall of the part body and continues to extend along the radial direction until the second reinforcing rib plate abuts against the inner side wall of the flanging part.

Compared with the submersible pump with the traditional design structure, in the technical scheme disclosed by the invention, the water inlet base is mainly formed by assembling the base body and the water blocking disc. The water blocking disc can rotate circumferentially relative to the seat body. The seat body and the water-blocking disc are respectively provided with an external water inlet gap and an internal water inlet gap. When the submersible pump is applied to a drawing scene of heavily polluted water, the external water inlet notch and the internal water inlet notch completely correspond to each other so as to allow water liquid containing large-particle impurities to enter the cavity of the submersible pump through the external water inlet notch and the internal water inlet notch in sequence; when the submersible pump is applied to a drawing scene of moderate polluted water, the rotary water blocking disc is rotated at a small angle around the central axis of the submersible pump, so that the external water inlet gap and the internal water inlet gap are partially staggered, and then the water blocking disc is locked in position, and in the state, water liquid containing medium-sized particle impurities is allowed to enter a cavity of the submersible pump through the external water inlet gap and the internal water inlet gap in sequence; when the submersible pump is applied to a clean water drawing scene, the rotary water blocking disc is rotated by a large angle around the central axis of the submersible pump, so that the external water inlet notch and the internal water inlet notch are completely staggered, and then the water blocking disc is locked in position. Therefore, in the practical application of the submersible pump, the clean water pumping function, the medium polluted water pumping function and the heavy polluted water pumping function can be freely switched by changing the circumferential rotating angle of the water blocking disc, so that a customer only needs to buy one submersible pump, and the purchase cost is greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a submersible pump in the prior art.

Fig. 2 is a perspective view of the three-purpose submersible pump of the present invention.

Fig. 3 is a top view of fig. 2.

Fig. 4 is a sectional view a-a of fig. 3.

Fig. 5 is an exploded view of the water intake base of the three-way submersible pump of the present invention.

Fig. 6 is a schematic perspective view of the water inlet base of the three-purpose submersible pump of the present invention.

Fig. 7 is a top view of fig. 6.

Fig. 8 is a sectional view B-B of fig. 7.

Fig. 9 is a perspective view of a first view angle of the seat body of the three-purpose submersible pump of the present invention.

Fig. 10 is a perspective view of a second perspective view of the seat body of the three-purpose submersible pump of the present invention.

Fig. 11 is a perspective view of the water-stopping disk of the three-purpose submersible pump of the present invention.

Fig. 12 is a perspective view of a first view of the cover plate of the three-way submersible pump of the present invention.

Fig. 13 is a perspective view of a second perspective view of the cover plate of the three-way submersible pump of the present invention.

Fig. 14 is a schematic view of the three-way submersible pump of the present invention with the water blocking disc and the seat body in a fully opposed state.

Fig. 15 is a schematic view of a water scooping path of the water blocking disk and the seat body in a completely opposed state in the present invention.

Fig. 16 is a schematic view of the water-blocking disk and the seat body in a partially dislocated state in the three-way submersible pump of the present invention.

FIG. 17 is a schematic view of the water scooping path of the water blocking tray and the seat body in a partially misaligned state in accordance with the present invention.

Fig. 18 is a schematic view of the three-way submersible pump of the present invention with the water blocking disc and the seat body in a completely dislocated state.

Fig. 19 is a schematic view of the water scooping path of the water blocking disk and the seat body in the completely dislocated state in the present invention.

1-a pump casing; 2-water outlet joint; 3-a water inlet base; 31-a seat body; 311-seat body; 3111-water passing holes; 3112-a flow channel; 3113-a first hooking arm; 3114-a second hooking arm; 312-skirt portion; 3121-external water inlet notch; 313-mounting a boss; 3131-a mounting post; 31311-a threaded hole; 314-a first reinforcement unit; 3141-a first stiffener plate; 32-a water blocking tray; 321-a body; 322-flanging part; 3221-a water inlet notch is arranged inside; 323-a second reinforcement unit; 3231-second reinforcing rib plate; 33-cover plate; 331-coupling through holes; 332-a limiting column; 3321-limiting groove; 333-first hooking notch; 334-second hooking notch; 34-a screw; 4-water pumping unit.

Detailed Description

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The technical solution disclosed in the present invention is further described in detail with reference to the specific embodiments, and fig. 2, fig. 3, and fig. 4 respectively show a schematic perspective view, a top view, and a sectional view a-a thereof of the three-purpose submersible pump of the present invention, and it can be seen that the three-purpose submersible pump mainly comprises a pump housing 1, a water outlet joint 2, a water inlet base 3, and a water pumping unit 4. Wherein, the water inlet base 3 and the pump shell 1 are mutually butted to form a containing cavity. The water outlet joint 2 is inserted and matched on the pump shell 1 and is communicated with the containing cavity. A water pumping unit 4 is also built in the receiving cavity. The pumping unit 4 comprises a motor and impeller assembly and when activated lifts water via the inlet base 3 into the outlet 2 by means of a pressure differential effect. The water inlet base 3 mainly comprises a base body 31 and a water blocking disc 32. Only the seat body 31 includes a seat body 311, a skirt portion 312, and a mounting boss 313. The seat body 311 is directly abutted to the pump housing 1, and is formed with a water passing hole 3111 and a flow passage 3112. When the seat body 311 is completely butted against the pump housing 1, the flow passage 3112 communicates with the water hole 3111 and the accommodation cavity. The skirt portion 312 is formed by the bottom wall of the seat body 311 extending downward, and 6 external water inlet gaps 3121 are uniformly distributed around the peripheral side wall thereof. The mounting boss 313 also extends downward from the bottom wall of the socket body 311. The water blocking disk 32 is detachably fixed to the mounting boss 313 and is circumferentially surrounded by the skirt portion 312. The water blocking plate 32 includes a body 321 directly fixed to the mounting boss 313 and a flange 322. The flanging part 322 is formed by continuously extending and upwards folding the peripheral side wall of the body 321 by 90 degrees, and 5 built-in water inlet notches 3221 are formed around the peripheral side wall. Assuming that the inner diameter of the skirt portion 312 is R and the outer diameter of the flange portion 322 is R, R-R is less than or equal to 4.5 mm. Assuming that the distance between the lower plane of the body 321 and the lower plane of the skirt portion 312 is D, D is less than or equal to 4.5 mm. By rotating the water blocking disc 32 in the circumferential direction, the matching relationship between the external water inlet notch 3121 and the internal water inlet notch 3221 can be freely switched among the completely opposite state, the partially dislocated state and the completely dislocated state (as shown in fig. 5 to 11). Through adopting above-mentioned technical scheme to set up, in the practical application of immersible pump, through changing the relative circumference dislocation angle between water-blocking disc 32 and the pedestal 31, can make it draw the function in clean water, moderate contaminated water draw the function, heavily contaminated water draw the function and freely switch between, mean for the customer only need purchase a section immersible pump can, reduced the acquisition cost widely.

In the practical application of the three-way submersible pump:

1) when the submersible pump is applied to a drawing scene of heavily polluted water (the diameters of impurities and particles are larger than 12mm), the external water inlet notch 3121 and the internal water inlet notch 3221 completely correspond to each other, so that water liquid containing large-particle impurities is allowed to enter the accommodating cavity through the external water inlet notch 3121 and the internal water inlet notch 3221 in sequence, meanwhile, clean water containing small-particle impurities enters the accommodating cavity through a lower gap of the water blocking disc 32 or an assembly gap between the base body 31 and the water blocking disc 32 in sequence, and is then discharged outside through the water outlet section 2 (as shown in fig. 14 and 15);

2) when the submersible pump is applied to a drawing scene of medium polluted water (the diameters of impurities and particles are larger than 4.5mm and smaller than 12mm), the rotary water blocking disc 32 is rotated at a small angle around the central axis thereof, so that the external water inlet notch 3121 and the internal water inlet notch 3221 are partially dislocated, and then the water blocking disc 32 is locked in position, in this state, water liquid containing medium-sized particle impurities is allowed to enter the accommodating cavity sequentially through the external water inlet notch 3121 and the internal water inlet notch 3221, and meanwhile, clean water containing small-sized particle impurities enters the accommodating cavity sequentially through a lower gap of the water blocking disc 32 or an assembly gap between the seat body 31 and the water blocking disc 32, and then is discharged outwards through the water outlet section 2 (as shown in fig. 16 and 17);

3) when the submersible pump is applied to a clean water drawing scene, the rotating water blocking disc 32 is rotated by a large angle around the central axis thereof, so that the external water inlet gap 3121 is completely dislocated from the internal water inlet gap 3221, and then the water blocking disc 32 is locked in position, in this state, the internal water inlet gap 3221 is completely blocked, and only water liquid containing small-sized particle impurities is allowed to enter the accommodating cavity sequentially through the lower gap of the water blocking disc 32 or the assembly gap between the seat body 31 and the water blocking disc 32 (as shown in fig. 18 and 19).

It is required to be noted herein; 1) the number, shape and size of the external water inlet gaps 3121, the opening position of the external water inlet gaps on the seat body 31, the number, shape and size of the internal water inlet gaps 3221, and the opening position of the internal water inlet gaps on the water blocking disc 32 can be specifically set according to different practical application scenarios and different requirements of customers; 2) in view of reducing the production and manufacturing cost, the seat body 31 and the water blocking disc 32 are preferably precision castings, and a large amount of subsequent machining operation of the traditional casting is eliminated.

As is known, the water-stop disc 32 can take various designs to achieve the removable fixing with the seat 31, but here an embodiment is proposed that is simple in design, easy to manufacture and implement, and easy to perform the post-maintenance operations, as follows: as one of the preferred embodiments, as shown in fig. 5, a cover plate 33 and a screw 34 are added to the water inlet base 3. After the positioning of the body 321 with respect to the mounting boss 313 is completed, the cover plate 33 supports the bottom wall of the body 321, and is fixed to the mounting boss 313 by the screw 34. In the process of sequentially rotating the screws 34, the cover plate 33 moves in a displacement manner relative to the water blocking disc 32 until the water blocking disc 32 is stably pressed between the cover plate 33 and the seat body 31, the whole operation process is convenient and rapid, so that the water blocking disc 32 can be adaptively changed in the rotating direction according to different practical application scenes before the submersible pump is subjected to performance change, and the submersible pump also has the capability of better resisting water flow impact without changing the rotating angle in the actual operation.

As shown in fig. 10, as a further optimization of the structure of the seat body 31, 4 mounting posts 3131 may extend downward from the bottom wall of the mounting boss 313 (of course, the actual number of the mounting posts 3131 may also be specifically set according to the desired rotation angle of the water blocking plate 32 in a single operation). A threaded hole 31311 matched with the screw 34 extends upwards from the bottom wall of the mounting post 3131. The cover plate 33 is provided with 4 coupling through holes 331 adapted to the screws 34. Therefore, the self weight and the molding cost of the seat 31 can be effectively reduced on the premise of ensuring the correct installation height and installation stability of the water blocking plate 32.

In addition, as shown in fig. 12 and 13, it is also possible to extend 4 limiting columns 332 upward from the top wall of the cover plate 33 with respect to the coupling through-hole 331. A limit groove 3321 matched with the outer diameter of the mounting post 3131 extends downwards from the top wall of the limit post 332. In the installation operation of the water blocking disc 32, the water blocking disc is firstly held by hand and is adjusted in position until the limiting grooves 3321 are correspondingly matched with the mounting posts 3131 one by one, then the water blocking disc 32 is pushed to move in a displacement manner relative to the seat body 31 until the mounting posts 3131 sink into the corresponding limiting grooves 3321, namely, the accurate alignment operation of the water blocking disc 32 relative to the seat body 31 is completed, and then the screws 34 are screwed in sequence.

As can be seen from the above description, after the water blocking disc 32 completes the precise alignment operation with respect to the seat body 31, and before the screw 34 is screwed in, the operator needs to always support the water blocking disc 32, so that the operator needs to cooperatively operate with two hands, the requirement on the action coordination is very high, or another auxiliary person is needed to perform the penetrating and screwing operations of the screw 34, which results in a great waste of human resources. In view of this, as shown in fig. 10, 12 and 13, around the water through hole 3111, a first hooking arm 3113 and a second hooking arm 3114 extend downward from the bottom wall of the holder body 311. Correspondingly, the cover plate 33 is provided with a first hooking notch 333 adapted to the first hooking arm 3113 and a second hooking notch 334 adapted to the second hooking arm 3114. As shown in fig. 8, after the water blocking disc 32 is aligned with respect to the seat 31, the operator only needs to support the water blocking disc 32 until the first hooking arm 3113 and the second hooking arm 3114 correspondingly hook and connect with the first hooking notch 333 and the second hooking notch 334 one by one, and meanwhile, each mounting post 3131 sinks into the corresponding limiting groove 3321, and then the water blocking disc 32 can be released, and the penetrating and screwing operations of the screws 34 are performed subsequently.

It is known that during the process of pumping operation of the submersible pump, the skirt portion 312 and the flange portion 322 are inevitably subjected to a large water impact force, and thus the assembly gap between the skirt portion and the flange portion is changed, and finally the functional definition between the moderate polluted water drawing performance and the clean water drawing performance is influenced. In view of this, it is very urgent to increase the structure of the seat 31 and the water blocking disk 32, and the following is recommended in the specific embodiment: 1) as for the holder body 31, as shown in fig. 10, a first reinforcing unit 314 is added inside the holder body 31. The first reinforcing unit 314 is formed of a plurality of first reinforcing rib plates 3141 circumferentially and uniformly distributed around the inner side wall of the skirt portion 312. The first reinforcing rib plate 3141 is formed by extending the bottom wall of the seat body 311 downwards, and continues to extend along the radial direction until the two end parts respectively contact the inner side wall of the skirt part 312 and the outer side wall of the mounting boss 313; 2) as shown in fig. 11, the water blocking plate 32 is provided with a second reinforcing unit 323. The second reinforcement unit 323 is formed of a plurality of second reinforcement plates 3231 that are circumferentially and evenly distributed around the inner side wall of the burring 322. The second stiffener plate 3231 is formed by extending the top wall of the body 321 upwards, and continues to extend in the radial direction until it contacts the inner sidewall of the flange 322.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A three-purpose submersible pump comprises a pump shell, a water outlet joint, a water inlet base and a water pumping unit; wherein the water inlet base and the pump shell are mutually butted to form an accommodating cavity; the water outlet joint is inserted and matched on the pump shell and is communicated with the accommodating cavity; the water pumping unit is also arranged in the accommodating cavity; the water pumping unit comprises a motor and an impeller assembly, and when the water pumping unit is started, water is lifted to the water outlet joint through the water inlet base by means of a pressure difference effect; the seat body comprises a seat body, a skirt edge part and a mounting boss; the seat body is directly butted with the pump shell, and a water through hole and a flow channel are formed on the seat body; when the seat body is completely butted relative to the pump shell, the flow channel is communicated with the water through hole and the accommodating cavity at the same time; the skirt edge part is formed by continuously extending the bottom wall of the seat body downwards, and M external water inlet gaps are uniformly distributed around the peripheral side wall of the skirt edge part; the mounting boss is formed by continuously extending the bottom wall of the seat body downwards; the water blocking disc is detachably fixed with the mounting boss and is circumferentially surrounded by the skirt part; the water blocking disc comprises a piece body and a flanging part which are directly fixed with the mounting boss; the flanging part is formed by continuously extending and upwards turning over the peripheral side wall of the piece body by 90 degrees, and N built-in water inlet notches are formed around the peripheral side wall of the piece body, wherein N is less than or equal to M; assuming that the inner diameter of the skirt part is R and the outer diameter of the flanging part is R, R-R is less than or equal to 4.5 mm; assuming that the distance between the lower plane of the piece body and the lower plane of the skirt edge part is D, the D is less than or equal to 4.5 mm; through right the circumference rotation is carried out to the dish that blocks water, so that external breach of intaking with mutually supporting relation between the built-in breach of intaking freely switches between complete relative state, partial dislocation state, complete dislocation state.

2. The three-purpose submersible pump according to claim 1, wherein the water intake base further comprises a cover plate; after the body is positioned relative to the mounting boss, the cover plate supports the bottom wall of the body and is fixed to the mounting boss by means of screws.

3. The three-way submersible pump according to claim 2, wherein a plurality of mounting posts extend downwardly from the bottom wall of the mounting boss; a threaded hole matched with the screw extends upwards from the bottom wall of the mounting column; and the cover plate is provided with connecting through holes which are consistent with the mounting columns in number and are matched with the screws.

4. The three-purpose submersible pump according to claim 3, wherein a plurality of stopper posts extend upward from the top wall of the cover plate opposite to the coupling through-hole; and a limiting groove matched with the outer diameter of the mounting column extends downwards from the top wall of the limiting column.

5. The three-purpose submersible pump according to claim 2, wherein a first hooking arm and a second hooking arm extend downwards from the bottom wall of the seat body around the water through hole; correspondingly, a first hook notch matched with the first hook hanging arm and a second hook notch matched with the second hook hanging arm are respectively arranged on the cover plate.

6. The three-way submersible pump according to any of claims 1 to 5, wherein the housing further comprises a first reinforcement unit; the first reinforcing unit is composed of a plurality of first reinforcing rib plates which are circumferentially and uniformly distributed around the inner side wall of the skirt part; the first reinforcing rib plate is formed by downwards extending the bottom wall of the seat body and continuously extends along the radial direction until two end parts of the first reinforcing rib plate respectively abut against the inner side wall of the skirt part and the outer side wall of the mounting boss.

7. The three-way submersible pump according to any of claims 1-5, characterized in that the water-blocking disc further comprises a second stiffening unit; the second reinforcing unit is composed of a plurality of second reinforcing rib plates which are uniformly distributed in the circumferential direction around the inner side wall of the flanging part; the second reinforcing rib plate is formed by upward extending the top wall of the part body and continues to extend along the radial direction until the second reinforcing rib plate is pressed against the inner side wall of the flanging part.