阅读说明：本技术 双进口带便拆清污板的大流量无堵塞高吸程自吸泵 (High-flow non-blocking high-suction-lift self-sucking pump with double inlets and easy-to-detach dirt cleaning plate ) 是由 汪祈燕 于 2021-10-08 设计创作，主要内容包括：本发明公开了双进口带便拆清污板的大流量无堵塞高吸程自吸泵,包括自吸泵泵体,自吸泵泵体的内部设置有叶轮组件,自吸泵泵体的背面设置有用于叶轮组件驱动的驱动机构,自吸泵泵体的顶端设置有真空辅助机构,自吸泵泵体的前端设置有双进水机构,双进水机构包括侧面进水口和前端进水口,自吸泵泵体内腔的后端开设有自吸泵排水腔,自吸泵泵体的内腔设置有自吸泵进水口吸液腔,叶轮组件包括设置于自吸泵排水腔内腔的叶轮一和叶轮二。本发明能够实现自吸泵的双进口作业,通过采用高吸程开式叶轮或螺旋式带切割式叶轮配合叶轮口环,抗堵塞性能显著提高,设置便拆式盖板对其进行封堵,从而提高自吸泵的工作效率。(The invention discloses a large-flow blockage-free high-suction-range self-sucking pump with a double-inlet conveniently-detached dirt cleaning plate, which comprises a self-sucking pump body, wherein an impeller assembly is arranged in the self-sucking pump body, a driving mechanism for driving the impeller assembly is arranged on the back surface of the self-sucking pump body, a vacuum auxiliary mechanism is arranged at the top end of the self-sucking pump body, a double-water-inlet mechanism is arranged at the front end of the self-sucking pump body, the double-water-inlet mechanism comprises a side water inlet and a front end water inlet, a self-sucking pump drainage cavity is formed in the rear end of an inner cavity of the self-sucking pump body, a self-sucking pump water inlet liquid suction cavity is formed in the inner cavity of the self-sucking pump body, and the impeller assembly comprises a first impeller and a second impeller which are arranged in the inner cavity of the self-sucking pump drainage cavity. The invention can realize the double-inlet operation of the self-priming pump, the anti-blocking performance is obviously improved by adopting the high-suction-stroke open impeller or the spiral belt cutting impeller to be matched with the impeller opening ring, and the easy-to-detach cover plate is arranged to block the impeller opening ring, thereby improving the working efficiency of the self-priming pump.)

1. The large-flow blockage-free high-suction-range self-sucking pump with the double inlets and the conveniently-disassembled sewage disposal plate comprises a self-sucking pump body (1), and is characterized in that an impeller assembly is arranged inside the self-sucking pump body (1), a driving mechanism used for driving the impeller assembly is arranged on the back surface of the self-sucking pump body (1), a vacuum auxiliary mechanism is arranged at the top end of the self-sucking pump body (1), and a double water inlet mechanism is arranged at the front end of the self-sucking pump body (1);

the double water inlet mechanism comprises a side water inlet (11) and a front end water inlet (12), the side water inlet (11) is formed in the top of the side face of the self-sucking pump body (1), the front end water inlet (12) is formed in the front top of the self-sucking pump body (1), a self-sucking pump water discharging cavity (20) is formed in the rear end of the inner cavity of the self-sucking pump body (1), a self-sucking pump water inlet liquid sucking cavity (17) is formed in the inner cavity of the self-sucking pump body (1), and the self-sucking pump water inlet liquid sucking cavity (17) is located among the side water inlet (11), the front end water inlet (12) and the self-sucking pump water discharging cavity (20) and is respectively communicated with the side water inlet (11), the front end water inlet (12) and the self-sucking pump water discharging cavity;

the impeller assembly comprises a first impeller (10) and a second impeller (19) which are arranged in an inner cavity of a self-priming pump drainage cavity (20), the first impeller (10) is positioned at the front end of the second impeller (19), an impeller opening ring (18) is arranged at the rear end of the second impeller (19), and a gap is formed between the impeller opening ring (18) and the front end of the second impeller (19);

the front of the self-priming pump body (1) just is located the below position department of front end water inlet (12) and has seted up the dirt cleaning mouth, the outer wall of dirt cleaning mouth is fixed and is provided with just tearing formula dirt cleaning cover plate (13), impeller one (10) and impeller two (19) are the arbitrary one in high suction stroke open impeller or the spiral cutting formula impeller respectively.

2. The large-flow non-clogging high-suction-stroke self-sucking pump with the double-inlet conveniently-detached trash cleaning plate according to claim 1 is characterized in that the driving mechanism comprises a self-sucking pump motor (3), a self-sucking pump base (22) is arranged at the bottom end of the self-sucking pump body (1), the self-sucking pump motor (3) is arranged at the back of the self-sucking pump body (1) and fixedly connected with the top end of the self-sucking pump base (22), and a mechanical seal anti-idling oil chamber support (21) is fixedly arranged between port positions of a self-sucking pump drainage cavity (20) of the self-sucking pump body (3) and the self-sucking pump body (1).

3. The large-flow blockage-free high-suction-stroke self-sucking pump with the double inlets and the conveniently-detachable trash cleaning plate is characterized in that a water discharging through hole is formed in the inner cavity of the self-sucking pump body (1) and is located below a liquid sucking cavity (17) at a water inlet of the self-sucking pump, a water discharging ball valve (14) is arranged at the end of the water discharging through hole, and a water discharging end cover is arranged outside the water discharging ball valve (14).

4. The high-flow blockage-free high-suction-lift self-sucking pump with the double inlets and the conveniently-disassembled trash cleaning plate according to claim 1 is characterized in that a water outlet elbow (9) is fixedly arranged at a position of a water outlet formed in the top end of a self-sucking pump body (1), and a check valve rubber plate (16) is arranged in the middle of the water outlet elbow (9).

5. The high-flow blockage-free high-suction-stroke self-sucking pump with the double inlets and the conveniently-disassembled trash cleaning plate is characterized in that the vacuum auxiliary mechanism comprises a vacuum pump (2), a vacuum pump exhaust channel (23) and a suction pipeline (7), the vacuum pump (2) is fixedly arranged above a self-sucking pump motor (3), and the vacuum pump (2) is communicated with the vacuum pump exhaust channel (23) through the suction pipeline (7).

6. The high-flow blockage-free high-suction-lift self-sucking pump with the double inlets and the conveniently-disassembled trash cleaning plate is characterized in that one end of the air sucking pipeline (7) is fixedly communicated with an air sucking filter (5), the air sucking filter (5) is fixedly communicated with the vacuum pump (2), and the middle of the air sucking pipeline (7) is fixedly provided with a vacuum air sucking pipe steam-water separator (6).

7. The high-flow blockage-free high-suction-lift self-sucking pump with the double inlets and the conveniently-disassembled trash cleaning plate according to claim 1, characterized in that a mechanical floating ball water tank (15) is fixedly arranged at the position, corresponding to a vacuum pump exhaust channel (23), of the top end of a self-sucking pump body (1), and a duckbilled floating ball liquid level sensor is arranged in an inner cavity of the mechanical floating ball water tank (15).

8. The high-flow blockage-free high-suction-lift self-sucking pump with the double inlets and the conveniently-disassembled trash cleaning plate is characterized in that a vacuum pump automatic controller (4) is fixedly arranged at one side of the vacuum pump (2), and the vacuum pump automatic controller (4) is electrically connected with the vacuum pump (2) through a duckbilled floating ball liquid level sensor in a mechanical floating ball water tank (15).

9. The high-flow blockage-free high-suction-lift self-sucking pump with the double inlets and the conveniently-disassembled trash cleaning plate as recited in claim 1, characterized in that a stainless steel buffer tank (8) is fixedly communicated with the top end of the mechanical floating ball water tank (15), and the top end of the stainless steel buffer tank (8) is fixedly communicated with the other end of the air suction pipeline (7).

10. The high-flow blockage-free high-suction-stroke self-sucking pump with the double inlets and the conveniently-disassembled trash cleaning plate as claimed in claim 1 is characterized in that an exhaust port (24) is formed in the top end of a self-sucking pump body (1), the exhaust port (24) is communicated with a liquid sucking cavity (17) at a water inlet of the self-sucking pump, and a detachable sealing cover is arranged outside the exhaust port (24).

Technical Field

The invention relates to the field of self-sucking pumps, in particular to a high-flow non-blocking high-suction-lift self-sucking pump with double inlets and a conveniently-disassembled dirt cleaning plate.

Background

The self-priming pump belongs to a self-priming centrifugal pump and has the advantages of compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long service life, stronger self-priming capability and the like. The pipeline does not need to be provided with a bottom valve, and only quantitative liquid guiding is required to be ensured to be stored in the pump body before work. The self-priming pump has the working principle that before the water pump is started, the pump shell is filled with water (or the water is stored in the pump shell). After the impeller is started, the impeller rotates at a high speed to enable water in the impeller channel to flow to the volute, at the moment, the inlet forms vacuum, the water inlet check valve is opened, and air in the suction pipe enters the pump and reaches the outer edge through the impeller channel.

The side and the front of the pump body can be used as a water inlet in the prior double-suction self-sucking pump, but two ports can not be used as inlets at the same time, because the internal flow channel and the water outlet of the double-suction self-sucking pump are not correspondingly amplified, the two inlets can only be used independently, for example, the front side of the double-suction self-sucking pump is required to be plugged when the side is used as the inlet, the side is required to be plugged when the front side is used as the inlet, the use significance is not large, the adopted impeller is a double-suction impeller, the defect of the double-suction impeller is that the anti-plugging effect is poor, a filter screen is required to be arranged for conveying a medium with large impurity content, and a cleaning structure is not arranged in front of the pump body, when the pump body is filled with large particle impurities, such as cobblestones or fiber impurities, and the pump body is required to be disassembled to be cleaned when the impeller is wound.

Disclosure of Invention

The invention aims to provide a high-flow blockage-free high-suction-lift self-sucking pump with a double-inlet conveniently-detached dirt cleaning plate, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the large-flow blockage-free high-suction-range self-sucking pump with the double inlets and the conveniently-disassembled trash cleaning plate comprises a self-sucking pump body, wherein an impeller assembly is arranged inside the self-sucking pump body, a driving mechanism used for driving the impeller assembly is arranged on the back surface of the self-sucking pump body, a vacuum auxiliary mechanism is arranged at the top end of the self-sucking pump body, and a double water inlet mechanism is arranged at the front end of the self-sucking pump body;

the double water inlet mechanism comprises a side water inlet and a front end water inlet, the side water inlet is formed in the top of the side face of the self-priming pump body, the front end water inlet is formed in the top of the front face of the self-priming pump body, a self-priming pump water discharging cavity is formed in the rear end of an inner cavity of the self-priming pump body, a self-priming pump water inlet liquid sucking cavity is formed in the inner cavity of the self-priming pump body, and the self-priming pump water inlet liquid sucking cavity is located among the side water inlet, the front end water inlet and the self-priming pump water discharging cavity and is respectively communicated with the side water inlet, the front end water inlet and the self-priming pump water discharging cavity;

the impeller assembly comprises an impeller I and an impeller II which are arranged in an inner cavity of a drainage cavity of the self-priming pump, the impeller I is positioned at the front end of the impeller II, an impeller opening ring is arranged at the rear end of the impeller II, and a gap is formed between the impeller opening ring and the front end of the impeller II;

the front of the self-priming pump body and the lower position department that is located the front end water inlet have seted up the dirt cleaning mouth, the outer wall of dirt cleaning mouth is fixed and is provided with just tearing open formula dirt cleaning cover plate, impeller one and impeller two are respectively for arbitrary one in high suction lift open impeller or the spiral cutting formula impeller.

Preferably, actuating mechanism includes the self priming pump motor, the bottom mounting of the self priming pump body is provided with the self priming pump base, the self priming pump motor set up in the back of the self priming pump body and with the top fixed connection of self priming pump base, the fixed mechanical seal that is provided with between the self priming pump drainage cavity port department of the self priming pump motor and the self priming pump body prevents idle oil room support.

Preferably, a water discharge through hole is formed in the inner cavity of the pump body of the self-priming pump and is located below a liquid suction cavity of a water inlet of the self-priming pump, a water discharge ball valve is arranged at the end of the water discharge through hole, and a water discharge end cover is arranged outside the water discharge ball valve.

Preferably, a water outlet elbow is fixedly arranged at the position of a water outlet formed in the top end of the self-priming pump body, and a check valve rubber plate is arranged in the middle of the water outlet elbow.

Preferably, the vacuum auxiliary mechanism comprises a vacuum pump, a vacuum pump exhaust passage and an air suction pipeline, the vacuum pump is fixedly arranged above a self-sucking pump motor, and the vacuum pump is communicated with the vacuum pump exhaust passage through the air suction pipeline.

Preferably, one end of the air suction pipeline is fixedly communicated with an air inlet filter, the air inlet filter is fixedly communicated with a vacuum pump, and a vacuum air suction pipe steam-water separator is fixedly arranged in the middle of the air suction pipeline.

Preferably, the top of the self priming pump body and the corresponding position department of vacuum pump exhaust passage are fixed and are provided with mechanical floater water tank, the inner chamber of mechanical floater water tank is provided with duckbilled floater level sensor.

Preferably, one side position of vacuum pump is fixed and is provided with vacuum pump automatic control, just vacuum pump automatic control passes through duckbilled floater level sensor and vacuum pump electric connection in the mechanical floater water tank.

Preferably, the top end of the mechanical floating ball water tank is fixedly communicated with a stainless steel buffer tank, and the top end of the stainless steel buffer tank is fixedly communicated with the other end of the air suction pipeline.

Preferably, the top end of the self-priming pump body is provided with an exhaust port, the exhaust port is communicated with a liquid suction cavity of a water inlet of the self-priming pump, and a detachable sealing cover is arranged outside the exhaust port.

The invention has the technical effects and advantages that:

(1) the self-priming pump can realize that the side water inlet or the front water inlet of the self-priming pump is used as an independent water inlet, and simultaneously can also use the side water inlet and the front water inlet as the water inlets together, thereby realizing the double-inlet operation of the self-priming pump, enhancing the cavitation resistance and the anti-blocking performance of the self-priming pump and improving the working efficiency of the self-priming pump;

(2) according to the invention, through the arrangement of the first impeller, the second impeller and the impeller opening ring in the self-priming pump drainage cavity in the self-priming pump body, the first impeller and the second impeller are matched to adopt any one of a three-blade high-suction-stroke open impeller or a spiral belt cutting impeller, so that solid particles with larger diameters can pass through the self-priming pump, the anti-blocking performance is obviously improved, and the working efficiency of the self-priming pump is further improved;

(3) according to the self-priming pump, the dirt cleaning port is formed in the self-priming pump body, the conveniently detachable cover plate is arranged on the dirt cleaning port to plug the self-priming pump, a user can conveniently detach and observe or clean the blockage in the inner cavity of the self-priming pump body, and the whole self-priming pump does not need to be detached to clean and maintain when the blockage or the fault occurs, so that the convenience of cleaning and maintenance is improved, and the working efficiency of the self-priming pump is further improved.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

FIG. 2 is a schematic perspective view of the second embodiment of the present invention.

FIG. 3 is a schematic side view of the present invention.

FIG. 4 is a schematic view of a partially cut-away perspective structure of a self-priming pump body according to the present invention.

FIG. 5 is a schematic side sectional view of the pump body of the self-priming pump of the present invention.

Fig. 6 is a front sectional structural schematic view of the high suction lift open impeller of the present invention.

In the figure: 1. a self-priming pump body; 2. a vacuum pump; 3. a self-priming pump motor; 4. an automatic controller for a vacuum pump; 5. an intake air filter; 6. a gas-water separator of the air suction pipe; 7. an air intake duct; 8. a stainless steel buffer tank; 9. a water outlet elbow; 10. an impeller I; 11. a side water inlet; 12. a front end water inlet; 13. the conveniently-disassembled type dirt-removing cover plate; 14. a water discharge ball valve; 15. a mechanical floating ball water tank; 16. a check valve rubber plate; 17. a water inlet of the self-priming pump is provided with a liquid-priming cavity; 18. an impeller eye ring; 19. an impeller II; 20. a self-priming pump drainage cavity; 21. the mechanical seal anti-idle oil chamber bracket; 22. a self-priming pump base; 23. a vacuum pump exhaust passage; 24. and (7) an exhaust port.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.

The invention provides a large-flow non-blocking high suction range self-priming pump with a double-inlet and a conveniently-detachable sewage disposal plate, which is shown in figures 1-6, and comprises a self-priming pump body 1, wherein the front end of the self-priming pump body 1 is provided with a double-water inlet mechanism, the double-water inlet mechanism comprises a side water inlet 11 and a front water inlet 12, the side water inlet 11 is arranged at the top of the side surface of the self-priming pump body 1, the front water inlet 12 is arranged at the top of the front surface of the self-priming pump body 1, the rear end of the inner cavity of the self-priming pump body 1 is provided with a self-priming pump water discharge cavity 20, the inner cavity of the self-priming pump body 1 is provided with a self-priming pump water inlet liquid suction cavity 17, the side water inlet 11, the front water inlet 12, the self-priming pump water discharge cavity 20 and the self-priming pump water inlet liquid suction cavity 17 are properly enlarged to meet the size requirement of double-inlet, the self-priming pump water inlet liquid suction cavity 17 is positioned among the side water inlet 11, the front water inlet 12 and the self-priming pump discharge cavity 20 and is respectively communicated with the three, so that water flow entering from the side water inlet 11 and the front water inlet 12 can flow into the self-priming pump drainage cavity 20 along the self-priming pump water inlet liquid suction cavity 17;

the self-priming pump comprises a self-priming pump body 1, an impeller assembly is arranged in the self-priming pump body 1, the impeller assembly is used for generating strong suction in a self-priming pump drainage cavity 20 in the self-priming pump body 1 to enable water in the self-priming pump body 1 to be discharged from a water outlet elbow 9, the impeller assembly comprises a first impeller 10 and a second impeller 19 which are arranged in an inner cavity of the self-priming pump drainage cavity 20, the first impeller 10 is positioned at the front end of the second impeller 19, the first impeller 10 and the second impeller 19 are respectively one of a three-blade high-suction-range open impeller or a spiral cutting impeller, the self-priming pump body 1 is good in anti-blocking effect by utilizing the three-blade high-suction-range open impeller or the spiral cutting impeller, the diameter of fixed particles is large, the generated suction strength is high, water flow can be sucked to 7-8 m height under the condition without vacuum assistance, an impeller opening ring 18 is arranged at the rear end of the second impeller 19, a gap is formed between the impeller opening ring 18 and the front end of the second impeller 19, the impeller I10 rotates to generate strong self-suction capacity, self-suction is completed in the process that the impeller I10 rotates at high speed, a cutting function is achieved, and the possibility of blockage of a pump body 1 of the self-suction pump is reduced;

the front surface of the self-priming pump body 1 and the position below the front end water inlet 12 are provided with a sewage cleaning opening, the outer wall of the sewage cleaning opening is fixedly provided with a conveniently-disassembled sewage cleaning cover plate 13, the conveniently-disassembled sewage cleaning cover plate 13 and the sewage cleaning opening are fixedly connected and can be fixed in a threaded connection, bolt tightening or buckle clamping manner, so that the conveniently-disassembled sewage cleaning cover plate 13 can be conveniently disassembled and assembled, a user can conveniently open the sewage cleaning opening to overhaul and clean the inside of the self-priming pump body 1 without disassembling a motor and a pump body like the existing self-priming pump to overhaul and clean the inside blockage of the self-priming pump, a water discharging through hole is arranged at the position below a self-priming pump water inlet liquid suction cavity 17 in the inner cavity of the self-priming pump body 1, the end part of the water discharging through hole is provided with a water discharging ball valve 14, the water discharging through hole is matched with the water discharging ball valve 14, and the user can conveniently carry out waterproof operation on the inside of the self-priming pump body 1, the use convenience is improved, the water discharging end cover is arranged outside the water discharging ball valve 14, the water discharging end cover can protect the water discharging ball valve 14, and meanwhile, the sealing protection effect on the water discharging through hole is improved;

the back of the self-priming pump body 1 is provided with a driving mechanism for driving an impeller assembly, the driving mechanism comprises a self-priming pump motor 3, a self-priming pump base 22 is fixedly arranged at the bottom end of the self-priming pump body 1, the self-priming pump base 22 can adopt a base which has elastic buffering and is convenient to install, the protection effect on the self-priming pump body 1 and the convenience of disassembly and assembly are improved, the self-priming pump motor 3 is arranged at the back of the self-priming pump body 1 and is fixedly connected with the top end of the self-priming pump base 22, a mechanical seal idling-prevention oil chamber support 21 is fixedly arranged between the self-priming pump motor 3 and the port of a self-priming pump drainage cavity 20 of the self-priming pump body 1, a mechanical seal structure is arranged in an oil chamber, the self-priming pump can be idled without water through lubricating oil which is filled into the mechanical seal idling-prevention oil chamber support 21 in advance, and the safety protection performance of the self-priming pump is improved;

the vacuum auxiliary mechanism is arranged at the top end of the self-sucking pump body 1 and comprises a vacuum pump 2, a vacuum pump exhaust passage 23 and an air sucking pipeline 7, the vacuum pump 2 is fixedly arranged above a self-sucking pump motor 3, the vacuum pump 2 is communicated with the vacuum pump exhaust passage 23 through the air sucking pipeline 7, one end of the air sucking pipeline 7 is fixedly communicated with an air inlet filter 5, entering gas can be filtered, dirty gas is prevented from entering the vacuum pump 2 to cause damage of the vacuum pump 2, the protection effect is improved, the air inlet filter 5 is fixedly communicated with the vacuum pump 2, a vacuum air sucking pipe steam-water separator 6 is fixedly arranged in the middle of the air sucking pipeline 7, and the vacuum air sucking pipe steam-water separator 6 is arranged, so that a user can conveniently observe whether water is sucked;

the top end of the self-priming pump body 1 is fixedly provided with a mechanical floating ball water tank 15 at a position corresponding to the vacuum pump exhaust channel 23, the inner cavity of the mechanical floating ball water tank 15 is provided with a duckbilled floating ball liquid level sensor, one side of the vacuum pump 2 is fixedly provided with an automatic vacuum pump controller 4, the automatic vacuum pump controller 4 is electrically connected with the vacuum pump 2 through the duckbilled floating ball liquid level sensor in the mechanical floating ball water tank 15, the automatic vacuum pump controller 4 feeds back signals through the duckbilled floating ball liquid level sensor arranged in the mechanical floating ball water tank 15, the vacuum pump 2 automatically stops when the water level is high, the vacuum pump 2 is pneumatic when the water level is low, the automatic control on starting and stopping of the vacuum pump 2 is realized, a mechanical floating ball in the mechanical floating ball water tank 15 floats together with water, when a certain water level is reached, a floating ball valve at the other end of the mechanical floating ball automatically seals and blocks an air suction pipeline 7 of the vacuum pump 2, and prevents liquid from being sucked by the vacuum pump 2 to cause damage, the protection of the vacuum pump 2 is improved;

the top end of the mechanical floating ball water tank 15 is fixedly communicated with a stainless steel buffer tank 8, the top end of the stainless steel buffer tank 8 is fixedly communicated with the other end of the air suction pipeline 7, the stainless steel buffer tank 8 is arranged to prevent double protection when the mechanical floating ball in the mechanical floating ball water tank 15 is out of order, redundant water is prevented from being sucked into the vacuum pump 2, the protection effect on the vacuum pump 2 is further improved, an air exhaust port 24 is formed in the top end of the self-sucking pump body 1, the air exhaust port 24 is communicated with a self-sucking pump water inlet liquid suction cavity 17, a detachable sealing cover is arranged outside the air exhaust port 24, when vacuum assistance is not needed, the pump cavity in the self-sucking pump body 1 is filled with water, then the sealing cover is unscrewed, and the air exhaust port 24 is opened for exhaust;

the fixed delivery port position department of seting up on the 1 top of the self priming pump body is provided with outlet elbow 9, and outlet elbow 9's middle part is provided with check valve rubber slab 16, and when the 1 internal work of the self priming pump body, the setting of check valve rubber slab 16 can prevent to the air suction of outlet pipe way, plays a guard action to the self priming pump, improves the security of its use.

The working principle of the invention is as follows: the self-priming pump motor 3 drives the impeller I10 and the impeller II 19 in the self-priming pump body 1 to rotate through the mechanical seal idling prevention oil chamber support 21, so that the self-priming pump motor generates strong suction effect in the inner cavity of the self-priming pump body 1, and is matched with the self-priming pump drainage cavity 20 in the self-priming pump body 1, the self-priming pump water inlet suction cavity 17, the front end water inlet 12, the side surface water inlet 11 and the water outlet to be properly amplified, so that an external water source can enter from the front end water inlet 12 and the side surface water inlet 11, thereby realizing double-port water inlet, then the water in the self-priming pump drainage cavity 20 is sent out from the water outlet by utilizing the suction effect generated by the rotation of the impeller I10 and the impeller II 19, thereby achieving double-inlet drainage, when a fault or blockage condition occurs, a user only needs to disassemble the conveniently-disassembled dirt cleaning cover plate 13 on the front surface of the self-priming pump body 1, so that the dirt cleaning port on the self-priming pump body 1 is opened, and the inspection and cleaning inside of the self-priming pump body 1 can be carried out, the motor and the pump body do not need to be disassembled.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.