CN213868230U

CN213868230U - Prefabricated pump station of integration of no jam and automatically cleaning

Info

Publication number: CN213868230U
Application number: CN202022816250.6U
Authority: CN
Inventors: 仲鹏
Original assignee: Qingdao Ruishun Taihe Pump Co ltd
Current assignee: Qingdao Ruishun Taihe Pump Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-08-03
Anticipated expiration: 2030-11-27

Abstract

The utility model provides a prefabricated pump station of integration of no jam and automatically cleaning, prefabricated pump station includes the pump station jar body, sets up the stealthily dirty pump of pump station jar internal chamber, stealthily dirty pump includes: a motor; the motor self-cooling unit comprises an oil sleeve and an oil storage chamber, the oil sleeve is arranged outside the motor shell, an oil cavity is formed between the oil sleeve and the motor shell, the oil storage chamber is communicated with the oil cavity, and a first impeller fixedly connected with an output shaft of the motor is arranged in the oil storage chamber; the tank cleaning spiral suction unit comprises a spiral centrifugal pump and a bottom barrel, an input shaft of the spiral centrifugal pump is fixedly connected with an output shaft of the motor, the spiral centrifugal pump is located in the bottom barrel, and a horn-shaped suction inlet is formed in the bottom of the spiral centrifugal pump. This prefabricated pump station is effectual has reduced the minimum operation water level of pump station, has saved the underground space, and the cost is reduced has realized the clear pond effect, has avoided the pump station to produce the foul smell.

Description

Prefabricated pump station of integration of no jam and automatically cleaning

Technical Field

The utility model relates to a fluid power equipment field especially relates to a prefabricated pump station of integration of no jam and automatically cleaning.

Background

The pump station is the only method for providing potential energy and pressure energy for water by a water pump and solving the problems of irrigation and drainage under the condition of no self-flow. The traditional concrete pump station as the current mainstream pump station has the disadvantages of high cost, long construction period, large manpower consumption and no movement. In order to improve the above problems, integrated prefabricated pump stations have been used to replace the conventional concrete pump stations.

The integrated prefabricated pump station is a product integrating a submersible sewage pump, pump station equipment and the like, and has the advantages of short construction period, convenience in installation, low cost and the like. The pump stop water level of the existing prefabricated pump station is high, and the lowest water level is higher than the motor of the submersible sewage pump, so that water is always stored in the pump station, and sewage in the pump station is easy to generate odor and pollute the environment; and sometimes, the industrial wastewater may generate toxic gas, and is dangerous when not being treated in time, and additional treatment equipment is needed when the industrial wastewater is treated, so that the cost is increased, and the additional space is occupied; and the overall height of the tank body of the prefabricated pump station is higher, and a pre-buried space needs to be dug deeply, so that a larger underground space is occupied, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a prefabricated pump station of integration of no jam and automatically cleaning to solve or alleviate the problem that exists among the prior art.

According to an aspect of the utility model, the utility model discloses a prefabricated pump station of integration of no jam and automatically cleaning, prefabricated pump station includes the pump station jar body, sets up the stealthily dirty pump of pump station jar internal chamber, stealthily dirty pump includes:

a motor;

the motor self-cooling unit comprises an oil sleeve and an oil storage chamber, the oil sleeve is arranged outside a shell of the motor, an oil cavity is formed between the oil sleeve and the shell of the motor, the oil storage chamber is communicated with the oil cavity, and a first impeller fixedly connected with an output shaft of the motor is arranged in the oil storage chamber;

the tank cleaning spiral suction unit comprises a spiral centrifugal pump and a bottom barrel, an input shaft of the spiral centrifugal pump is fixedly connected with an output shaft of the motor, the spiral centrifugal pump is located in the bottom barrel, and a horn-shaped suction inlet is formed in the bottom of the spiral centrifugal pump.

In some embodiments of the present invention, the centrifugal screw pump includes a spiral casing and a second impeller disposed in the spiral casing, a suction port for fluid to enter is disposed at a bottom end of the spiral casing, and an outlet is disposed at an end of the spiral casing opposite to or adjacent to the suction port;

the second impeller includes an impeller shaft and blades spirally arranged along an outer circumferential surface of the impeller shaft.

In some embodiments of the invention, the diameter of the impeller shaft and the blades increases gradually from the suction opening to the outlet.

In some embodiments of the present invention, the diameter of the bottom end of the trumpet-shaped suction inlet is greater than the diameter of the top end of the trumpet-shaped suction inlet, the bottom end of the trumpet-shaped suction inlet has a first distance from the bottom wall of the bottom cylinder, and the outer edge of the trumpet-shaped suction inlet has a second distance from the sidewall of the bottom cylinder.

In some embodiments of the present invention, the side wall of the bottom cylinder is provided with at least one pre-spiral channel extending from the top end to the bottom end.

In some embodiments of the present invention, the central position of the bottom cylinder is provided with a flow guiding column facing the horn-shaped suction inlet.

In some embodiments of the present invention, the cooling system further includes an oil chamber end cover, the oil jacket has an end connected to the oil chamber end cover in a sealing manner, and the oil chamber end cover has a predetermined distance from the first end cover of the motor to form the oil storage chamber.

In some embodiments of the present invention, the oil jacket is connected to the oil chamber end cap through an annular connecting member, and the annular connecting member is connected to the oil jacket and the oil chamber end cap by a sealing ring.

In some embodiments of the present invention, the other end of the oil jacket is connected to the second end cap of the motor in a sealing manner.

By utilizing the integrated prefabricated pump station of the non-clogging and self-cleaning of the present disclosure, the beneficial effects that can be obtained are at least as follows:

the motor of the integrated prefabricated pump station is cooled through the motor self-cooling unit, so that the cooling efficiency of the motor is improved, and the motor of the submersible sewage pump can be exposed in the air to run, so that the lowest running water level of the pump station is effectively reduced, the underground space is saved, and the cost is reduced; in addition, the pool cleaning spiral suction unit is provided with a bottom barrel, and the bottom of the spiral centrifugal pump is provided with a horn-shaped suction inlet, so that all fluid in the bottom barrel can be sucked by the spiral suction, the pool cleaning effect is realized, and the odor generated by a pump station is avoided.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the following detailed description.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. For convenience in illustrating and describing some portions of the present invention, corresponding parts of the drawings may be exaggerated, i.e., may be larger, relative to other components in an exemplary device actually manufactured according to the present invention. In the drawings:

fig. 1 is a front view of an integrated prefabricated pump station with no blockage and self-cleaning according to an embodiment of the present invention;

FIG. 2 is a side view of the integrated prefabricated pump station shown in FIG. 1.

FIG. 3 is a top view of the integrated prefabricated pump station shown in FIG. 1.

Fig. 4 is a schematic structural diagram of a motor self-cooling unit according to an embodiment of the present invention.

Fig. 5 is a schematic front structural view of a spiral suction unit for cleaning pool according to an embodiment of the present invention.

Fig. 6 is a top view of the pool cleaning spiral suction unit shown in fig. 5.

Fig. 7 is a schematic structural diagram of a volute of a centrifugal screw pump according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of an impeller of a screw centrifugal pump according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of an impeller of a screw centrifugal pump according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and/or process steps that are closely related to the solution according to the invention are shown in the drawings, while other details that are not relevant to the invention are omitted.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.

It is also noted herein that the term "coupled," if not specifically stated, may refer herein to not only a direct connection, but also an indirect connection in which an intermediate is present.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.

The utility model relates to an embodiment discloses a prefabricated pump station of integration, and this prefabricated pump station is including a jar body and stealthily dirty pump. As shown in fig. 1 to 3, the submersible sewage pump is disposed in an inner cavity of a tank body 001, the tank body 001 may specifically be of a cylindrical barrel structure, the number of the submersible sewage pumps may be one or more, fig. 1 shows a schematic structural diagram of a prefabricated pump station including two submersible sewage pumps, and the structure of the prefabricated pump station having other numbers of submersible sewage pumps is similar to that of the prefabricated pump station shown in fig. 1. Further, the submersible sewage pump comprises a motor, a motor self-cooling unit and a pool cleaning spiral suction unit.

Fig. 4 is a schematic structural diagram of a motor self-cooling unit according to an embodiment of the present invention, as shown in fig. 4, the motor self-cooling unit includes an oil jacket 130 and an oil storage chamber 150. The oil jacket 130 is disposed outside the motor housing 112, and the oil jacket 130 is spaced apart from the motor housing 112 by a predetermined distance to form the oil chamber 120. For example, the structural shape of the motor housing 112 may be a cylinder or a rectangular parallelepiped, and in this case, the oil jacket 130 may also be a cylinder or a rectangular parallelepiped. The oil reservoir 150 is used to store cooling oil, and communicates with the oil chamber 120. The oil chamber 150 is further provided with a first impeller 152, and the first impeller 152 is fixedly connected to the output shaft of the motor 13 and rotates synchronously. In a normal operation state of the submersible sewage pump, the impeller 152 is used for pushing the cooling oil in the oil storage chamber 150 to the oil chamber 120 between the oil jacket 130 and the motor housing 112 under the rotation action of the motor output shaft, and the cooling oil is circulated in the oil chamber 120.

Fig. 5 is a schematic front structural view of a spiral suction unit for cleaning pool according to an embodiment of the present invention, and fig. 6 is a top view of the spiral suction unit for cleaning pool, which includes a centrifugal screw pump and a bottom barrel 4, as shown in fig. 5 and 6. The bottom barrel 4 can be a cylindrical barrel structure with an open top, the spiral centrifugal pump is positioned in the cylindrical bottom barrel 4, and an input shaft of the spiral centrifugal pump is fixedly connected with an output shaft of the motor 13. The bottom of the screw centrifugal pump is provided with a trumpet-shaped suction inlet 3. The pool cleaning spiral suction unit ensures that all fluid in the bottom barrel 4 can be sucked spirally under the matching action of the trumpet-shaped suction port 3 and the bottom barrel 4, and impurities and dirt cannot be remained in the bottom barrel 4, so that the pool cleaning effect is realized.

The oil reservoir 150 may specifically be located between the motor 13 and the screw-centrifugal pump with the motor output shaft, impeller and screw-centrifugal pump input shaft rotating in unison. The submersible sewage pump motor of the integrated prefabricated pump station adopts the motor self-cooling unit, and the motor 13 is exposed in the air, so that the motor 13 can be rapidly cooled, the stable operation of the submersible sewage pump is ensured, the lowest operation water level of the integrated prefabricated pump station is effectively reduced, the underground occupied space is reduced, and the cost is saved. And the spiral suction unit is matched with the pool cleaning, so that the pool cleaning effect is realized, the odor generated by the pump station is avoided, and the surrounding environment of the pump station is improved. And the oil reservoir 150 is provided between the motor and the screw centrifugal pump so that the cooling oil in the oil reservoir 150 can further exchange heat with the cooling medium in the pump body pump chamber 161, thereby more effectively reducing the time required for cooling the motor 13.

Preferably, the screw centrifugal pump comprises a volute 1 and a second impeller 2 arranged inside the volute 1. A suction port 11 into which fluid flows is provided at a bottom end of the scroll casing 1, and an outlet 12 is provided at an end of the scroll casing 1 opposite or adjacent to the suction port 11. Fig. 7 is a schematic structural diagram of the spiral casing 1 of the centrifugal screw pump according to an embodiment of the present invention, and it can be seen from the diagram that the suction port 11 of the spiral casing 1 of this embodiment is located at the bottom end of the spiral casing 1, and the outlet 12 is located at one end of the spiral casing 1 adjacent to the suction port 11, that is, at the left side of the spiral casing 1. It will be appreciated that the location of the outlet 12 on the volute 1 may vary accordingly depending on the particular operating environment, for example it may also be specifically located on the right side of the volute 1, or at the end opposite the suction opening 11 of the volute 1.

Fig. 8 and 9 are schematic structural views of the second impeller 2, and further, the second impeller 2 includes an impeller shaft 21 and blades 22 spirally arranged along an outer circumferential surface of the impeller shaft 21. Specifically, the lower end of the second impeller 2 is disposed near the suction port 11 of the scroll casing 1, and the upper end of the second impeller 2 is disposed near the outlet 12 of the scroll casing 1, and preferably, the diameters of the impeller shaft 21 and the vanes 22 are gradually increased from the suction port 11 to the outlet 12. During operation of the screw centrifugal pump, the helical blades 22 lift the liquid upwards as the impeller shaft 21 is rotated, and the liquid is spun out of the outlet 12 due to the centrifugal action of the impeller shaft 21.

As can be seen from fig. 8 and 9, the blade 22 may further include a pointed lead-in 221 at the bottom of the second impeller 2, a middle flow guide 222 at the middle end of the second impeller 2, and a centrifugal lead-out 223 at the upper end of the second impeller 2.

For the screw centrifugal pump, the second impeller 2 consists of a spiral blade 22 and a centrifugal impeller shaft 21, and the foremost end of the whole second impeller 2 is in a sickle shape; therefore, under the rotation action of the screw centrifugal pump, the spiral blades 22 generate spiral propelling action, and the sickle-shaped structure at the front end guides the liquid flow and the contained objects to the vicinity of the axis and then propels the liquid flow and the contained objects along the axial direction by utilizing the spiral action. Providing good pumping capacity and lower cavitation margin requirements. At the same time, the flow is finally discharged from the outlet 12 of the volute 1, due to the centrifugal action of the centrifugal impeller shaft 21.

The length of the second impeller 2 is 3-5 times that of the conventional single-channel impeller for conveying solids. In this way, energy is gradually transferred to the liquid along the entire length of the second impeller 2, resulting in a lower surface pressure of the second impeller 2. The low energy gradient and the large curvature of the blades 22 keep the flow state of the water flow unchanged in the whole process of passing through the second impeller 2, the flow speed is smooth, and the low shear and the low disturbance are realized. This unique design gently transports liquid from the inlet to the outlet 12, thereby saving energy with very little disruption to the surface of the vanes 22. Even if local cavitation occurs, the pump can still work normally, so that liquid containing gas can be pumped.

In an embodiment of the present invention, the diameter of the trumpet-shaped suction inlet 3 located at the bottom of the screw centrifugal pump is gradually reduced from bottom to top, in other words, the diameter of the bottom end of the trumpet-shaped suction inlet 3 is larger than the diameter of the top end. Moreover, in order to ensure the pool cleaning effect, the bottom end of the trumpet-shaped suction port 3 is spaced from the bottom wall of the bottom barrel 4 by a first distance, and the outer edge of the trumpet-shaped suction port 3 is spaced from the side wall of the bottom barrel 4 by a second distance. Preferably, the first distance is 80 units, the second distance is 85 units, the diameter of the bottom cylinder 4 is 570 units, the maximum diameter of the bell mouth suction port is 400 units, and the suction caliber of the screw centrifugal pump is 100 units. It should be understood that the above units may be specifically millimeters, centimeters, and the like, and if the units are millimeters, the first distance is 80mm, and the second distance is 85 mm. Also, the various dimensions described above may be scaled up or down in equal proportion.

The side wall of the bottom tube 4 is provided with at least one pre-helical channel 41 extending from the top end to the bottom end. The pre-spiral channel 41 has the function that the fluid entering the bottom barrel 4 is in a rotational flow state, the rotational flow state fluid is the same as the spiral suction direction of the spiral centrifugal pump, the fluid in the bottom barrel 4 can enter the pump in a spiral mode, and the pool cleaning effect can be achieved more easily. Illustratively, the bottom cylinder 4 may be a circular truncated cone-shaped cylinder structure, and the diameter of the bottom cylinder 4 gradually increases from the bottom end to the top end. Besides, the bottom cylinder 4 can also be a cylindrical cylinder structure.

It should be understood that the specific specification and size of the trumpet-shaped suction inlet 3 and the bottom cylinder 4 can be designed according to the specification of the pump, as long as it can ensure that after the medium flows into the bottom cylinder 4, the medium can form rotational flow along the pre-spiral channel 41 of the bottom cylinder 4 in the same direction as the pump body flow channel and then enters the pump flow channel, so as to completely pump the impurities and sundries in the bottom cylinder 4 into the pump cavity 161. However, it should be noted that if the first distance between the trumpet-shaped suction port 3 and the bottom cylinder 4 is too large, the pool cleaning effect cannot be realized, so that the medium remains in the bottom cylinder 4; if the first distance is too small, the suction capacity of the screw centrifugal pump is insufficient, and the normal work is influenced.

Further, a flow guiding column 42 protruding toward the trumpet-shaped suction port 3 is further provided at a central position of the bottom tube 4 on the bottom wall. The flow guiding column 42 is beneficial to avoiding the middle position of the fluid in the rotational flow state, so that the spiral fluid is easier to form, and the fluid at the bottom of the cylinder is convenient to be sucked into the pump cavity 161 completely. Thereby more effectively realizing the pool cleaning effect.

For the integrated prefabricated pump station without blockage and self-cleaning in the embodiment of the utility model, self-cleaning of the prefabricated pump station is realized through the pool cleaning spiral suction unit, so that an additional independent cleaning device is not needed to be arranged for the prefabricated pump station; in addition, the pool cleaning spiral suction unit enables all fluid in the bottom barrel to be sucked in a spiral mode due to the arrangement of the spiral centrifugal pump, the pool cleaning effect is achieved, residual fluid cannot be reserved, and therefore blockage of an internal system of the prefabricated pump station is prevented, and the pool cleaning effect is achieved more effectively.

In an embodiment of the present invention, the self-cooling system includes an oil chamber end cap 151, and the oil chamber end cap 151 is a part of the oil storage chamber 150. As shown in fig. 4, the end of the motor near the oil chamber 150 is provided with a motor end cover, which is referred to as a first end cover 113 of the motor. The output shaft of the motor extends into the oil storage chamber 150 from the first end cover 113 of the motor, and the impeller positioned in the oil storage chamber 150 is fixed on the output shaft of the motor, so that the synchronous rotation with the output shaft of the motor is ensured. The first end of the oil sleeve 130 is hermetically connected with the oil chamber end cover 151; the first end cap 113 of the motor is spaced from the oil chamber end cap 151 by a predetermined distance, so that an oil storage chamber 150 is formed between the first end cap 113 of the motor and the oil chamber end cap 151.

The first end of the oil jacket 130 and the oil chamber end cover 151 can be connected through threads, and in addition, the connection can also be realized through a mode of additionally installing a connecting piece. As shown in fig. 1, an annular connection member 140 may be provided between the oil jacket 130 and the oil chamber end cover 151, and one end of the annular connection member 140 is hermetically connected to the oil jacket 130, and the other end is hermetically connected to the oil chamber end cover 151. Specifically, the ends of the oil jacket 130 and the annular connecting piece 140 may be connected by threads, and are additionally sealed by sealing rings; accordingly, the end of the annular connecting member 140 and the oil chamber end cap 151 can be sealed by screwing a sealing ring. In addition, the oil jacket 130 and the annular connecting member 140, and the annular connecting member 140 and the oil chamber end cover 151 may be hermetically connected by bolts and screws and by adding a sealant.

Further, the other end of the oil jacket 130 is hermetically connected with the second end cover 111 of the motor. For example, the inner surface of the oil jacket 130 may have an internal thread, and the outer surface of the second end cover 111 of the motor has an external thread matching the internal thread, and the oil jacket 130 and the second end cover 111 are further connected by a thread. In addition, as shown in fig. 1, an external thread for matching with the internal thread on the oil jacket 130 may also be provided at an end of the housing of the motor near the second end cover 111. In addition, the oil jacket 130 and the second end cover 111 of the motor may be connected by gluing at the joint position.

Preferably, an oil filling port is arranged at one end of the oil sleeve 130 far away from the oil chamber end cover 151. The oil filler port is used to add cooling oil to the oil reservoir chamber 150 or the oil chamber 120. It can be plugged through the bolt 131 under the normal operating condition of the submersible sewage pump.

According to the embodiment, the self-cooling system is adopted for the motor of the submersible sewage pump of the integrated prefabricated pump station, so that the cooling efficiency of the motor is increased, and the motor of the submersible sewage pump can be exposed to the air to run, so that the lowest running water level of the pump station is effectively reduced, the underground space is saved, and the cost is reduced; in addition, the pool cleaning spiral suction unit is provided with a bottom barrel, and the bottom of the spiral centrifugal pump is provided with a horn-shaped suction inlet, so that all fluid in the bottom barrel can be sucked by the spiral suction, the pool cleaning effect is realized, and the odor generated by a pump station is avoided.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a prefabricated pump station of integration of no jam and automatically cleaning, prefabricated pump station includes the pump station jar body, sets up the stealthily dirty pump of the internal chamber of pump station jar, its characterized in that, stealthily dirty pump includes:

a motor;

the motor self-cooling unit comprises an oil sleeve and an oil storage chamber, the oil sleeve is arranged outside the motor shell, an oil cavity is formed between the oil sleeve and the motor shell, the oil storage chamber is communicated with the oil cavity, and a first impeller fixedly connected with an output shaft of the motor is arranged in the oil storage chamber;

2. The integrated non-clogging and self-cleaning prefabricated pump station according to claim 1, wherein the helico-centrifugal pump comprises a volute and a second impeller arranged in the volute, a suction port for fluid to enter is formed in the bottom end of the volute, and an outlet is formed in one end of the volute, which is opposite to or adjacent to the suction port;

3. The integrated pre-manufactured pump station of claim 2, wherein the impeller shaft and the vanes have diameters that gradually increase from the suction opening to the outlet.

4. The integrated non-clogging and self-cleaning prefabricated pump station according to any one of claims 1 to 3, wherein the diameter of the bottom end of the flared suction inlet is larger than the diameter of the top end of the flared suction inlet, the bottom end of the flared suction inlet is spaced from the bottom wall of the bottom cylinder by a first distance, and the outer edge of the flared suction inlet is spaced from the side wall of the bottom cylinder by a second distance.

5. The integrated pre-fabricated pump station with no clogging and self cleaning according to claim 4, characterized in that the side wall of the bottom canister is provided with at least one pre-helical channel extending from the top end to the bottom end.

6. The integrated prefabricated pump station of no blockage and self cleaning of claim 5, characterized in that a flow guiding column protruding towards the trumpet-shaped suction inlet is arranged at the center of the bottom barrel.

7. The integrated prefabricated pump station of no blockage and self-cleaning of claim 6, wherein the self-cooling system further comprises an oil chamber end cover, one end of the oil sleeve is connected with the oil chamber end cover in a sealing mode, and a predetermined distance is reserved between the oil chamber end cover and the first end cover of the motor to form the oil storage chamber.

8. The prefabricated pump station of integration of unblock and self-cleaning of claim 7, characterized in that, pass through annular connecting piece between the oil cover and the oil chamber end cover, annular connecting piece with the oil cover with the oil chamber end cover between all have the sealing washer.

9. The integrated prefabricated pump station of no blockage and self cleaning of claim 7, wherein the other end of the oil jacket is hermetically connected with a second end cover of the motor.