CN220487887U - Submersible electric pump for well - Google Patents

Abstract

The utility model discloses a submersible pump for a well, which belongs to the field of submersible pumps and comprises a submersible motor, a submersible pump and a water inlet joint, wherein the submersible motor is detachably and fixedly connected with the water inlet joint, each shell of the water inlet joint and each shell of the submersible pump are in positioning connection through a spigot, a fixed seat is arranged at the rear part of the submersible pump, a water inlet and a plurality of circumferentially distributed connecting parts are arranged on the water inlet joint, each shell of the water inlet joint, the submersible pump and the fixed seat are fixedly connected into a whole through a tensioning piece penetrating through the connecting parts, a rotor output shaft of the submersible motor is connected with a pump shaft through a coupler, and the pump shaft is connected with an impeller. The water inlet and the connecting parts distributed circumferentially are arranged on the water inlet joint, the water outlet and the threaded holes are arranged on the fixing base, the water inlet joint, the shells of the submersible pump and the fixing base are fixedly connected into a whole through the tensioning piece penetrating through the connecting parts, the installation fastening of the single-stage submersible pump and the multi-stage submersible pump can be rapidly carried out, the installation and the disassembly are simple, and the cost of the submersible pump is reduced.

Description

Submersible electric pump for well

Technical Field

The utility model relates to the technical field of submersible electric pumps, in particular to a submersible electric pump for a well.

Background

The existing submersible pump generally comprises a motor and a pump body, wherein one end of the pump body is provided with the motor, the other end of the pump body is provided with a fixed seat, the center of the fixed seat is provided with a water outlet, a plurality of impellers are arranged in the pump body between the fixed seat and the motor, and a motor rotating shaft penetrates through the centers of the plurality of impellers and is connected to the fixed seat. The impeller is an energy conversion device of a centrifugal pump, and has the functions of collecting liquid thrown out by the impeller, reducing the flow speed of the liquid, converting part of speed energy into pressure energy, uniformly introducing the pressure energy into the next stage or discharging the pressure energy through a diffusion pipe, wherein the impeller consists of the impeller and the impeller, the center of the impeller body is provided with a center through hole, and a rubber bearing is arranged in the center through hole.

CN 219035033U discloses a submerged motor pump for well, discloses the detachable fixed connection of casing one end and water inlet section one end of submerged motor, and multistage impeller and the combination configuration each shell of stator are fixed a position through the tang after arranging according to the order respectively between the shell, and a plurality of tensioning member is used to fix each shell casing, and tensioning member one end of prior art has the buckle, and the play water end of buckle fastening fixing base, the tensioning member other end extends to water outlet section to through bolt and water outlet section fixed connection.

In the prior art, the well submersible pump is relatively complex to install and disassemble, and the fittings of the plurality of tensioning members also increase the cost of the submersible pump.

Disclosure of Invention

The utility model aims to provide a submersible pump for a well, which aims to solve the technical problems that the existing submersible pump main body provided in the background art is fastened by a common tensioning strip, the installation and the disassembly are complex, and meanwhile, the cost of the submersible pump is increased due to the fittings of a plurality of tensioning pieces.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a submerged motor for well, includes submerged motor, immersible pump, water inlet section, submerged motor and the detachable fixed connection of water inlet section, and water inlet section passes through tang location with each casing of immersible pump and is connected, and the immersible pump rear portion is equipped with the fixing base, be equipped with the connecting portion that water inlet and a plurality of circumference distribute on the water inlet section, be equipped with delivery port and a plurality of screw hole on the fixing base, pass each casing and fixing base fixed connection of water inlet section, immersible pump through the taut piece and become an entirety, submerged motor rotor output shaft passes through the shaft coupling and is connected with the pump shaft, and the pump shaft is connected with the impeller.

Preferably, the tensioning piece is rectangular shape double-end screw rod, be equipped with 4 sets of circumference distribution's connecting portion on the festival of intaking, connecting portion are equipped with the through-hole, and fixing base outer end circumference a week is equipped with 4 sets of screw holes that can with tensioning piece one end screw-thread fit, and the through-hole on 4 sets of connecting portions aligns with the screw hole on 4 sets of fixing bases in spatial position.

Preferably, the submersible motor is provided with a waterproof shell, the waterproof shell is sealed by using a sealing sleeve and a sealing gasket to prevent water from entering, one end of the submersible motor is provided with a clamping spring to seal and fix the bottom cover, and a rotor of the submersible motor is taken as an output shaft to extend out from the other end.

Preferably, the water inlet joint is of a frame type structure, a plurality of openings are formed in the middle of the water inlet joint and are communicated with the inside of the submersible pump, the water inlet joint is a water inlet of the submersible pump for a well, and a filter screen is arranged at the water inlet of the middle of the water inlet joint.

Preferably, the main part of immersible pump includes casing and lower casing, goes up the casing that the casing is an interior cavity that establishes, go up casing upper end and water inlet joint and pass through tang locate adaptation, lower extreme and lower casing pass through tang locate adaptation, go up casing mid-mounting and have the impeller, lower casing is the casing of a cavity, and lower casing lower extreme and fixing base pass through tang locate adaptation, the lower casing is equipped with the stator, the position and the shape and the impeller adaptation work of stator.

Preferably, the impeller is of a disc-shaped or blade-shaped structure, fluid located between the blades does work, the fluid is thrown to the periphery from the middle of the impeller, the guide vane consists of a plurality of blades attached to the inner wall of the submersible pump shell, the bending direction of the blades is opposite to the bending direction of the blades of the impeller, and the bending angle of the blades is exactly matched with the flowing direction of liquid from the impeller.

Preferably, a bearing component is arranged at the middle shaft part of the lower shell to support the pump shaft.

Preferably, the impeller is fixedly arranged on the pump shaft through a fastening sleeve, the fastening sleeve is a cylindrical sleeve with an opening groove, the end of the sleeve is C-shaped, the axial direction of the fastening sleeve forms a certain taper, and one end with a small diameter is provided with threads. Preferably, the circumference of the outer end of the fixing seat is provided with a plurality of connecting through holes distributed circumferentially.

Compared with the prior art, the utility model has the beneficial effects that:

1. the water inlet and the connecting parts distributed circumferentially are arranged on the water inlet joint, the water outlet and the threaded holes are arranged on the fixing base, the water inlet joint, the shells of the submersible pump and the fixing base are fixedly connected into a whole through the tensioning piece penetrating through the connecting parts, the installation fastening of the single-stage submersible pump and the multi-stage submersible pump can be fast carried out, the installation and the disassembly are simple, and the cost of the submersible pump is reduced.

2. The smaller diameter end of the tight sleeve penetrates through the impeller center Kong Zai to be sleeved on the pump shaft, and the tight sleeve is screwed by the nut from the other end. After screwing the nut, the impeller can be fastened and fixed because the diameter of the rear end of the fastening sleeve is larger. Meanwhile, as the tight sleeve is provided with the opening of the open slot, the whole impeller has metal elasticity, so that the coaxiality of the impeller can be improved and ensured, and the working efficiency and the working durability of the impeller are improved.

Drawings

Fig. 1 is a schematic view of a submersible pump for a well according to the present utility model.

Fig. 2 is a front view of a submersible pump for a well of the present utility model.

Fig. 3 is a schematic view showing the internal structure of a submersible pump for wells according to the present utility model.

Fig. 4 is a schematic view of a water pump part of a submersible pump for a well according to the present utility model.

Fig. 5 is a front view showing the structure of a water pump part of a submersible pump for a well according to the present utility model.

Fig. 6 is another side view of a water pump portion of a submersible well pump of the present utility model.

FIG. 7 is a schematic view showing the internal structure of a water pump part of a submersible pump for a well according to the present utility model.

FIG. 8 is a schematic diagram of a pump shaft of a submersible pump for a well according to the present utility model.

Reference numerals illustrate:

the submersible pump comprises a 1-submersible motor, a 2-clamp spring, a 3-submersible pump, a 4-water inlet joint, a 5-filter screen, a 6-tensioning piece, a 7-fixed seat, an 8-upper shell, a 9-lower shell, a 10-impeller, 11-guide vanes, 12-pump shafts, 13-fixed sleeves, 14-motor rotors and 15-connecting parts.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, 2 and 3, the conventional submersible pump generally comprises a submersible motor 1 and a pump body of a submersible pump 3, and is completely immersed in water during operation. The power supply is sent to the submersible motor through the waterproof cable, and the pumped water is sent to the ground through the water lifting pipe. One end of the pump body of the submersible pump 3 is provided with a submersible motor 1, the other end of the pump body is provided with a fixed seat 7 or called a water outlet section, the center of the fixed seat 7 is provided with a water outlet, a plurality of impellers 10 and guide vanes 11 are arranged in the pump body between the fixed seat 7 and the submersible motor 1, the outsides of the impellers 10 and the guide vanes 11 are protected and supported by a shell, a motor rotating shaft drives the impellers 10 to rotate through a driving shaft, the combination of the impellers 10 and the guide vanes 11 can be set into one group or multiple groups, and the working strength of the submersible pump can be increased through superposition of the multiple groups, namely, the pump lift is improved. Because the submersible pump is arranged in the water tank, the submersible motor has special structural requirements compared with a common motor, and the stator and rotor cavities of the motor are prevented from entering non-insulating media so as to ensure the insulating strength of the motor. The motor can be classified into various types such as a sub-type, a semi-dry type, a wet type, and an oil filled type according to the difference of filling an insulating medium into a stator cavity.

After the submersible motor is started, the impeller 10 is driven by the output shaft of the submersible motor 1 to rotate, a water body rotates in the impeller 10 along with the blades, mechanical energy is converted into pressure energy, then fluid flows into the guide vane 11 from the impeller 10, the guide vane 11 plays a role of a pumping chamber, the speed of the fluid in the guide vane 11 is reduced, the pressure is increased to a certain degree at the inlet of the guide vane 11, and then the fluid flows out of the guide vane 11 to enter the impeller 10 of the next stage or is directly sent to a pumping pipe to drain. The impeller 10 forms a low-pressure area after water flows into the guide vane 11, and the external water can make fluid enter the impeller 10 under the action of atmospheric pressure, so that the external fluid can continuously enter the submersible pump to work.

The original installation scheme of each component of the submerged motor pump is as follows: the outer shell one end of the submersible motor 1 is detachably and fixedly connected with one end of the water inlet joint 4, the multistage impeller 10 and the guide vane 11 are combined to configure each outer shell, the outer shells are respectively and sequentially configured and then positioned through the seam allowance, a plurality of tensioning pieces are used for fixing each outer shell, one end of each tensioning piece is provided with a buckle, the buckle is fastened with the water outlet end of the fixing seat, and the other end of each tensioning piece extends to the water outlet joint and is fixedly connected with the water outlet joint through bolts. The above-mentioned scheme is installed and dismantled comparatively complicated, and the accessory of a plurality of tensioning members has also increased the cost of submerged motor pump simultaneously.

The above structure is the prior art, and the improvement points of this embodiment are as follows:

referring to fig. 1, 2 and 3, the submersible motor 1 is provided with a waterproof shell, and is sealed by using a sealing sleeve and a sealing gasket to prevent external water inflow, one end of the submersible motor 1 is provided with a clamping spring 2 to seal and fix a bottom cover, a rotor of the submersible motor 1 is taken as an output shaft to extend out from the other end, the output shaft of the rotor of the submersible motor 1 outputs torque of the submersible motor, the output shaft of the rotor of the submersible motor 1 is connected with a pump shaft 12 through a coupler, and the pump shaft 12 is connected with an impeller 10. The outer casing of the power output end of the submersible motor 1 is detachably connected with the water inlet joint 4, the water inlet joint 4 is of a frame type structure, the front end of the water inlet joint is provided with a circular opening and is detachably fixedly connected with the outer casing of the submersible motor 1, the rear end of the water inlet joint 4 is provided with a circular opening and is detachably fixedly connected with the outer casing of the submersible pump 3, and a plurality of openings are formed in the middle end part of the water inlet joint 4 and are communicated with the submersible pump 3 to form a water inlet of the submersible pump for a well. The water inlet of the middle end part of the water inlet joint 4 is provided with a metal filter screen 5, and the filter screen 5 is used for filtering impurities with larger volume and preventing the abrasion of a water pump working main body. The bottom of the water inlet joint 4 is provided with a plurality of connecting parts 15, and the connecting parts 15 are provided with through holes through which long bolts can pass.

Referring to fig. 4, 5 and 7, the submersible pump 3 is sequentially composed of the water inlet section 4, the upper casing 8, the lower casing 9 and the fixing seat 7, and if the submersible pump is a high-lift multistage submersible pump, the number of the upper casing 8 and the lower casing 9 can be increased, namely, more impeller 10 and guide vane 11 combinations are added. The upper shell 8 is a shell with a hollow cavity, the upper end of the upper shell 8 is matched with the water inlet joint 4 through a spigot in a positioning way, and the lower end of the upper shell is matched with the lower shell 9 through a spigot in a positioning way. The middle part of the upper shell 8 is provided with an impeller 10, the impeller 10 is driven by a pump shaft 12, and the pump shaft 12 is connected with an output shaft of the submersible motor 1 through a coupler. The lower shell 9 is a shell with a hollow cavity, the upper end of the lower shell 9 is matched with the upper shell 8 through a spigot, and the lower end of the lower shell is matched with the fixed seat 7 through the spigot. The lower housing 9 is provided with guide vanes 11, and the position and shape of the guide vanes 11 are matched with the impeller 10. The shaft part of the lower shell 9 is provided with a bearing component for supporting the pump shaft 12. The impeller 10 has a disc-shaped or blade-shaped structure, and has a different number of blades, the fluid located between the blades does work, the fluid is thrown to the periphery from the middle of the impeller under the action of centrifugal force, and when the fluid reaches the periphery of the impeller, the flow velocity is high. The guide vane 11 is usually composed of several blades attached to the inner wall of the pump casing, the bending direction of the blades is opposite to that of the impeller 10, the bending angle of the blades is exactly matched with the direction of the liquid flowing out of the impeller 10, the liquid is guided to change direction in the pump casing channel smoothly, the energy loss is small, and the efficiency of converting dynamic pressure energy into static pressure energy is high.

The shaft portion of the fixed seat 7 is provided with a circular through hole, the through hole and the lower shell 9 are adapted to be a water outlet of the submersible pump 3, a plurality of threaded holes and connecting through holes are formed in the circumference of the outer end of the fixed seat 7, and a circular sliding groove is formed in the bottom of the fixed seat 7 and can be used for installing a waterproof gasket.

Referring to fig. 6 and 7, a plurality of threaded holes are formed in the circumference of the outer end of the fixing seat 7, and the plurality of threaded holes can be screwed with threads at one end of the tensioning piece 6. The tensioning piece 6 is a strip-shaped double-head screw rod, one end of the tensioning piece 6 is matched with a threaded hole in the fixed seat 7, and the other end of the tensioning piece passes through a connecting part 15 on the water inlet joint 4 to be perforated and then screwed through a nut. Preferably, 4 groups of connecting parts 15 are arranged on the water inlet joint 4 and provided with through holes, 4 groups of threaded holes which can be in threaded fit with one end of the tensioning piece 6 are arranged on the fixing seat 7, and the holes on the 4 groups of connecting parts 15 are aligned with the spatial positions of the threaded holes on the 4 groups of fixing seats 7. Further, the circumference of the outer end of the fixing seat 7 is provided with a plurality of connection through holes distributed circumferentially, the connection through holes on the fixing seat 7 can be in bolt connection with flanges of other water pump components, for example, the flanges of the water delivery pipeline can be in bolt connection with the fixing seat 7.

Referring to fig. 7 and 8, the impeller 10 is fixed to the pump shaft 12 by a locking sleeve 13, and the locking sleeve 13 is a cylindrical sleeve having an opening, and is C-shaped when viewed from the end. The axial direction of the tight sleeve 13 forms a certain taper, namely, one end with a small diameter and one end with a large diameter is provided with a thread. When the pump is used, the smaller diameter end of the tight sleeve 13 penetrates through the center Kong Zai of the impeller 10 to be sleeved on the pump shaft 12, and the tight sleeve 13 is screwed by a nut from the other end. After screwing the nut, the impeller 10 can be fastened and fixed because the diameter of the rear end of the fastening sleeve 13 is larger. Meanwhile, as the fastening sleeve 13 is provided with an opening groove opening, the whole impeller has metal elasticity, and the coaxiality of the impeller 10 can be improved and ensured.

The working principle is as follows: when the submersible pump is used, a single-stage submersible pump body or a multi-stage submersible pump body is used according to the requirements of working conditions, and the multi-stage submersible pump body is increased in lift by the combined use of a plurality of impellers 10 and guide vanes 11. When the submersible motor is used as a single-stage submersible pump body, the submersible motor 1 which is installed at first and is waterproof and sealed is fixed with one end of the water inlet joint 4, a rotor output shaft of the submersible motor 1 is connected with the pump shaft 12 through a coupler, and the pump shaft 12 is fixedly connected with the impeller 10 through the tight sleeve 13. One end of the pump shaft 12 is arranged on a bearing component arranged at the center shaft part of the lower shell 9. The filter screen 5 is installed on the water inlet joint 4, the upper shell 8, the lower shell 9 and the fixing seat 7 are sequentially matched through the seam allowance, the through hole of the connecting part 15 on the water inlet joint 4 is aligned with the threaded hole on the fixing seat 7, one end of the 4 tensioning pieces 6 penetrates through the through hole of the connecting part 15 and is screwed with the threaded hole on the fixing seat 7, then the other end of the tensioning piece 6 is screwed through the nuts, the water inlet joint 4, the upper shell 8, the lower shell 9 and the fixing seat 7 are fixedly installed together through the 4 screwed tensioning pieces 6, then the through hole on the fixing seat 7 is utilized to be connected with flanges of other water pump components through bolts, and the flanges of a water conveying pipeline can be connected with the fixing seat 7 through bolts. The working wire of the submersible motor 1 is connected to the control unit, the power supply and the control switch through the waterproof, so that the water pumping operation can be performed underwater.

Claims (9)

1. The utility model provides a submerged motor pump for well, includes submerged motor (1), immersible pump (3), water inlet section (4), its characterized in that: submersible motor (1) and the detachable fixed connection of section of intaking (4), each casing of section of intaking (4) and immersible pump (3) passes through tang location and is connected, immersible pump (3) rear portion is equipped with fixing base (7), be equipped with connecting portion (15) that water inlet and a plurality of circumference distribute on section of intaking (4), be equipped with delivery port and a plurality of screw hole on fixing base (7), pass connecting portion (15) through tensioning member (6) and become a whole with each casing and fixing base (7) fixed connection of section of intaking (4), immersible pump (3), submersible motor (1) rotor output shaft passes through the shaft coupling and is connected with pump shaft (12), and pump shaft (12) are connected with impeller (10).

2. The submersible well pump of claim 1, wherein: the tensioning piece (6) is a strip-shaped double-head screw, 4 groups of circumferentially distributed connecting portions (15) are arranged on the water inlet joint (4), through holes are formed in the connecting portions (15), 4 groups of threaded holes which can be in threaded fit with one end of the tensioning piece (6) are formed in the circumference of the outer end of the fixing base (7), and the through holes in the 4 groups of connecting portions (15) are aligned with the threaded holes in the 4 groups of fixing bases (7) in space position.

3. The submersible well pump of claim 1, wherein: the submersible motor (1) is provided with a waterproof shell, a sealing sleeve and a sealing gasket are used for sealing to prevent water from entering, one end of the submersible motor (1) is provided with a clamping spring (2) for sealing and fixing the bottom cover, and a rotor of the submersible motor (1) serves as an output shaft to extend out from the other end.

4. The submersible well pump of claim 1, wherein: the water inlet joint (4) is of a frame type structure, a plurality of openings are formed in the middle of the water inlet joint (4) and are communicated with the inside of the submersible pump (3), the water inlet joint is a water inlet of the submersible pump for a well, and a filter screen (5) is arranged at the water inlet of the middle of the water inlet joint (4).

5. The submersible well pump of claim 1, wherein: the main part of immersible pump (3) includes casing (8) and lower casing (9), goes up the casing of casing (8) for establishing the cavity in one, go up casing (8) upper end and water inlet joint (4) and pass through tang locate adaptation, lower extreme and lower casing (9) pass through tang locate adaptation, go up casing (8) mid-mounting and have impeller (10), lower casing (9) are the casing of a cavity, and lower casing (9) lower extreme and fixing base (7) pass through tang locate adaptation, lower casing (9) are equipped with stator (11), the position and the shape and impeller (10) adaptation work of stator (11).

6. The submersible pump for wells according to claim 5, wherein: the impeller (10) is of a disc-shaped or blade-shaped structure, fluid located between the blades does work, the fluid is thrown to the periphery from the middle of the impeller, the guide vane (11) is composed of a plurality of blades attached to the inner wall of the submersible pump shell, the bending direction of the blades is opposite to that of the blades of the impeller (10), and the bending angle of the blades is exactly matched with the flowing direction of liquid from the impeller (10).

7. The submersible pump for wells according to claim 5, wherein: the middle shaft part of the lower shell (9) is provided with a bearing part for supporting the pump shaft (12).

8. The submersible well pump of claim 1, wherein: the impeller (10) is fixedly arranged on the pump shaft (12) through a fastening sleeve (13), the fastening sleeve (13) is a cylindrical sleeve with an opening groove opening, the end part is C-shaped, the axial direction of the fastening sleeve (13) forms a certain taper, and one end with a small diameter is provided with threads.

9. The submersible well pump of claim 1, wherein: the circumference of the outer end of the fixing seat (7) is provided with a plurality of connecting through holes distributed circumferentially.