CN217926440U - Barrel assembly for multistage submersible pump and multistage submersible pump - Google Patents

Abstract

The utility model relates to the field of fluid technology, a barrel subassembly for multistage immersible pump is provided, barrel including a plurality of connection in order is provided with coupling assembling between two adjacent barrels, coupling assembling includes: the connecting component is an annular cylindrical body, and the upper end of the connecting component extends into the end part of the cylinder body positioned on the upper side; the lower end of the connecting component extends into the end part of the cylinder body positioned at the lower side; the first fastener is arranged at one end part of the connecting part, is arranged on the outer side wall of the connecting part and is used for connecting the cylinder to be adapted to the outer side of the connecting part; the second fastening piece is arranged at the other end of the connecting part and is used for connecting the other cylinder with the adaptation to the outer side of the connecting part; the multistage submersible pump comprises the cylinder assembly; the structure makes the disassembly and the assembly more convenient.

Description

Barrel assembly for multistage submersible pump and multistage submersible pump

Technical Field

The utility model relates to a fluid technical field refers in particular to a barrel subassembly and multistage immersible pump for multistage immersible pump.

Background

In the field of the existing water pump, a multistage submersible pump is generally adopted in order to obtain a higher lift, a pump body of the multistage submersible pump is connected with a motor output shaft in series through a plurality of impellers, and a long barrel is arranged outside the impellers; however, when the pump works, the impellers are possibly stuck by silt or damaged by other factors, and when one impeller is damaged, other impellers cannot work, and the whole water pump needs to be dismounted during maintenance, namely, one impeller in the cylinder cannot be directly repaired or replaced, and the process of dismounting the pump body is very complicated and troublesome.

In the prior art, the utility model is a high-lift multi-stage deep well submersible pump with publication number CN205895628U, and is named as a utility model, as shown in figure 1, the utility model comprises a pump body 1, a motor 2 and a machine barrel 3, a plurality of groups of impeller components 11 are arranged in the pump body 1, a barrel is arranged outside the impeller components 11,

referring to fig. 1, this prior art has the following disadvantages:

1. when the impeller inside is replaced and maintained, the whole pump body needs to be dismantled, which is troublesome.

2. Because the barrel is an holistic setting, should not directly maintain or change a certain impeller of the inside pump body.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a barrel subassembly and multistage immersible pump for multistage immersible pump, it is more convenient during the impeller when making the maintenance.

The technical scheme of the utility model is that:

a barrel subassembly for multistage immersible pump, includes the barrel that a plurality of connects in order, is provided with coupling assembling between two adjacent barrels, coupling assembling includes: the connecting component is an annular columnar body, and the upper end of the connecting component extends into the end part of the cylinder body positioned on the upper side; the lower end of the connecting component extends into the end part of the cylinder body positioned at the lower side; the first fastener is arranged at one end part of the connecting part, is arranged on the outer side wall of the connecting part and is used for connecting the cylinder to be adapted to the outer side of the connecting part; and the second fastener is arranged at the other end of the connecting part and is used for connecting the other cylinder with the adaptation to the outer side of the connecting part.

In another embodiment of the present invention, a ring groove is disposed in the middle of the connecting member, and a connecting base is formed on the side wall of the ring groove; a plurality of fastener mounting positions II are arranged on the horizontal ring surface of the connecting base; the second fastener includes: a second button and stud; the second button part extends into the side wall of the barrel body and forms a second rod part; and the stud penetrates through the second fastener mounting position of the connecting base and is screwed into the second rod part, so that the cylinder body is connected with the other end of the connecting component.

In another embodiment of the present invention, a plurality of first fastener mounting positions are provided on the circumferential ring surface of one end of the connecting member; the first fastener includes: a first button and screw; the first button part extends into the side wall of the barrel body and is embedded into the first fastener mounting position; and the screw penetrates through the first button and is screwed into the first fastener mounting position, so that the barrel is connected with one end of the connecting component.

The utility model discloses an in another embodiment, be equipped with the screw hole in above-mentioned fastener installation position one, the screw hole is: the counter bore comprises a blind hole and a counter bore, and the side wall of the blind hole is provided with internal threads; the first button comprises a cap part and a first rod part and is arranged in the counter bore; the first cap part is attached to the outer wall of a cylinder to be matched; the inner ring of the first button is provided with an internal thread; the screw penetrates through the cylinder to be matched and the first button, so that the first button is attached to the outer wall of the cylinder to be matched.

In another embodiment of the present invention, the connecting member is provided with a pillar and a support ring, the support ring is disposed in an inner ring of the connecting member and is concentric with the connecting member; the strut is arranged between the connecting part and the support ring, and the matching of the strut and the support ring is used for increasing the strength of the connecting part in the radial direction.

In another embodiment of the present invention, the above connecting assembly further comprises: the bracket is arranged at one end close to the second fastening piece; the support is provided with: the outer ring is attached to the inner ring of the other barrel body with the adaptive belt; and a first reinforcing rib for supporting the outer ring.

In another embodiment of the present invention, the above connecting assembly further comprises: and the sealing ring is arranged at the end part of the connecting component.

In another embodiment of the present invention, the above-mentioned connecting assembly further includes: the positioning component is arranged between two adjacent cylinders; one side of the positioning part is abutted against one side of the connecting base.

In another embodiment of the present invention, the second button has a second cap and a second rod, the second cap is attached to the outer wall of the cylinder; the second rod part is provided with a through hole; the screw rod is axially arranged relative to the connecting base; the screw rod penetrates through the connecting base and is connected with the through hole; the through hole is provided with an internal thread and is perpendicular to the second rod part.

The utility model also provides a multistage submersible pump, which comprises a driving motor and a pump body; the device also comprises the cylinder body component; the impeller assembly is arranged in the cylinder assembly and comprises an impeller, a plurality of impellers are connected in series on a driving shaft, and the driving shaft is connected to an output shaft of the driving motor; the drive shaft includes: the short shafts are connected to form a long shaft, and the connecting position between the short shafts is positioned at the support ring; the connecting assembly abuts against the impeller assembly, the screw and the second button are vertically stressed, and the screw pulls the connecting assembly to be close to the impeller assembly so that the connecting assembly compresses the impeller assembly; the impeller assembly abuts against the bottom of the bracket of the connecting assembly.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

1. the utility model provides a pair of a barrel subassembly for multistage immersible pump, based on above-mentioned content, in adapting unit located the barrel, the lateral wall of barrel was located to the fastener, and when installation or dismantlement, the barrel can not hinder operator's action for it is more convenient when dismantling and installing.

2. Based on the above, the fastener is provided with a button, a first button and a second button, the two buttons are provided with cap parts, the cap parts are attached to the outer wall of the barrel body with the adaptation, and the cap parts are used for preventing external impurities such as dust from entering the inside of the barrel body and avoiding damaging internal parts.

3. Based on the above, the connecting part is provided with the pillar and the support ring, so that the strength of the connecting part in the radial direction is increased, and the barrel is arranged outside the connecting part, so that the barrel is not easy to deform under the action of internal and external pressure.

4. Based on the above, the connecting component is divided into two parts: the support is provided with a reinforcing rib for supporting the outer ring, the outer ring is attached to the inner ring of the other barrel with the matching function, the strength of the other barrel is enhanced, and the barrel is prevented from being deformed due to overlarge pressure difference between the inside and the outside.

5. Based on the above, the positioning component is arranged between the two cylinders, so that the two cylinders to be matched are more convenient to position when being installed.

6. Based on the above, the connection and connection assembly is provided with the sealing ring, and the sealing ring is used for preventing liquid in the pump from flowing out or preventing air from leaking into the pump, so that the leakage of fluid is reduced, and the loss of fluid energy is reduced.

7. Based on the above, the pump body of the multistage submersible pump comprises a plurality of cylinders, one or a plurality of impellers are arranged in each cylinder, and when the impellers are maintained, only a single short cylinder needs to be removed, so that the maintenance efficiency is improved; and the side wall of the cylinder body is provided with the mounting hole, and the two cylinder bodies are connected through the connecting part, namely, when the cylinder is disassembled and assembled, the fastener is arranged on the side wall, so that the cylinder is easier to disassemble and assemble.

8. Further, based on above-mentioned content, during the installation, the second button is close to each other with the double-screw bolt, further can make barrel and coupling assembling be close to each other, and the inside impeller subassembly that is equipped with of barrel, coupling assembling's bottom supports and leans on the impeller subassembly, that is to say, the design of second button and double-screw bolt can make coupling assembling compress tightly the impeller subassembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic structural view of a high-lift multistage deep well submersible pump in the prior art.

Fig. 2 is a schematic view of a multistage submersible pump according to an embodiment of the present invention.

Fig. 3 is an explosion structure diagram of the connection assembly for the multistage submersible pump and the multistage submersible pump according to an embodiment of the present invention.

Fig. 4 is a sectional view and a partially enlarged view taken along a broken line B-B of fig. 1.

Fig. 5 is a partially enlarged view of fig. 4.

Fig. 6 is another partial enlarged view of fig. 4.

Fig. 7 is a schematic structural diagram of a connecting member according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a connecting member according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a bracket according to an embodiment of the present invention.

Fig. 10 is a schematic structural view of a first button according to an embodiment of the present invention.

Fig. 11 is a schematic structural view of a second button according to an embodiment of the present invention.

Fig. 12 is a schematic sectional structural view of a multistage submersible pump according to an embodiment of the present invention.

Description of reference numerals:

1. a pump body; 2. a motor; 3. a barrel; 4. an oil cup; 5. a clamp spring; 6. a pump head; 7. an upper end portion; 8. A connecting portion; 9. a lower end portion; 10. a drive shaft; 11. an impeller assembly; 12. a support; 13. a shaft sleeve; 14. A valve seat; 15. a check valve; 16. a water outlet; 17. a filter screen; 18. a gasket; 19. a coupling; 20. A sand-proof cap; 21. a sand prevention sleeve; 22. a water inlet; 23. a net strip; 24. a bearing seat; 25. a bearing; 26. A control box; 27. a motor shaft.

110-a connector; 22-a water inlet; 112-drive motor mounting; 33-pump body mounting section; 30-a barrel body; 31-a first cylinder; 32-a second cylinder; 40-a connecting assembly; 41-a connecting member; 42-a first fastener; 43-a second fastener; 44-a scaffold; 45-sealing ring; 46-a positioning member; 47-a stud; 48-a sealing ring;

101-a motor mounting portion; 102-a pump body mounting portion;

201-a first mounting hole; 202-a second mounting hole;

411-counter bored hole; 4111-blind hole; 4112-counter bore; 412-a pillar; 413-support ring; 414-connection mount; 415-a ring groove; 416-fastener mounting location two; 417-fastener mounting station one;

421-screw; 422-a first button; 4221-a first cap;

431-a second button; 432-a stud; 4311-second cap; 4312-second stem; 4313-through holes;

441-an outer ring; 442-a first stiffener; 461-positioning through hole; 462-plane;

50-an impeller assembly; 51-guide vanes; 52-guide vane shell.

Detailed Description

The foregoing and other technical contents, features and effects of the present invention will be apparent from the following detailed description of a preferred embodiment of the present invention, which is taken in conjunction with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front, rear, inner or outer, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

The invention will be further described in the following with reference to the accompanying drawings in which:

fig. 1 is a schematic view showing a structure of a high-lift multistage submersible pump in the related art.

In the existing water pump field, a multistage submersible pump is generally adopted in order to obtain a higher lift, a plurality of impeller assemblies 11 are connected in series on a motor shaft 27 in a pump body 1 of the multistage submersible pump, and a long cylinder body is arranged outside the plurality of impellers and is not shown in the figure; however, when the pump works, the impellers are possibly stuck by silt or damaged by other factors, and when one impeller is damaged, other impellers cannot work, and the whole water pump needs to be dismounted during maintenance, namely, a certain impeller in the cylinder cannot be directly repaired or replaced, so that the pump body is quite complex and troublesome to dismount.

Therefore, the utility model provides a barrel subassembly and multistage immersible pump for solve above-mentioned problem. The mode of splitting a barrel into a plurality of short barrels is adopted, one or a plurality of impellers are arranged in each barrel, and then only a single short barrel needs to be detached during maintenance, so that the maintenance efficiency is improved.

Fig. 2 is a schematic view of a multi-stage submersible pump according to an embodiment of the present invention;

fig. 3 is an explosion structure diagram of a barrel assembly for a multistage submersible pump and the multistage submersible pump according to an embodiment of the present invention.

Fig. 12 is a schematic sectional structural view of a multistage submersible pump according to an embodiment of the present invention.

Referring to fig. 2 and 12, in an embodiment of the present invention, a multi-stage submersible pump is provided, including a driving motor and a pump body; the pump body is internally provided with an impeller assembly 50, a plurality of impellers of the impeller assembly are connected in series on a driving shaft, and the driving shaft is connected to an output shaft of the driving motor; the outer side of the impeller is provided with a pump barrel for isolating the pressure difference between the inside and the outside of the pump body; when in use, the submersible pump further comprises a connecting piece 110 which is connected with the submersible pump, wherein the connecting piece 110 is made of a ferrous material, and the connecting piece 10 is provided with a water inlet 22, a driving motor mounting part 112 and a pump body mounting part 33; the pump body is connected with the driving motor through a connecting piece 110; when the driving motor works, the driving motor drives the impeller in the pump body to rotate, the pressure between the impeller and the water inlet 22 is reduced, water is sucked into the pump body, and the water is output to the opening in the pump body.

Referring to fig. 3, the pump cylinder includes: the pump body 30 is an annular cylindrical body, and the side wall of the cylinder body 30 is provided with a first mounting hole 201 and a second mounting hole 202; the two cartridges are connected by a connection assembly 40, the connection assembly 40 comprising: a connecting part 41, a first fastening member 42 and a second fastening member 43, the first fastening member 42 passing through the first mounting hole 201 to connect a cylinder 20 with the connecting part 41; the second fastening member 43 passes through the second mounting hole 202 to connect the other cylinder 20 with the connection member 41.

Based on the above, the pump body comprises a plurality of cylinder bodies 30, one or a plurality of impellers are arranged in each cylinder body 30, so that when the impellers are maintained, only a single short cylinder needs to be dismantled, the whole pump body does not need to be dismantled, and the maintenance efficiency is improved; and the lateral wall of the cylinder body is provided with a mounting hole, and the two cylinder bodies are connected with the two ends of the connecting part 41, namely when the two fasteners are dismounted and mounted, the cylinder body does not hinder workers, and the dismounting and mounting are easier.

Referring to fig. 5, the connection member 41 is provided with a support 412 and a support ring 413, the support ring 413 being concentrically disposed with the connection member 41; the support pillar 412 is disposed between the connecting member 41 and the support ring 413, and the support pillar 412 is used to increase the strength of the connecting member in the radial direction; and the drive shaft includes: and the short shafts are connected to form a long shaft, and the joint between the short shafts penetrates through the support ring. Referring to fig. 12, the connecting assembly 40 abuts against the impeller assembly 50, and due to the perpendicular force of the stud 432 and the second button 431, the stud 432 pulls the connecting assembly 40 close to the impeller assembly 50, so that the connecting assembly 40 compresses the impeller assembly 50; the impeller assembly 50 rests against the bottom of the bracket 44 of the connection assembly 40

Based on the above, the more the number of stages of the multi-stage submersible pump is; the longer the pump body; and thus the longer the drive shaft; when the driving shaft rotates, the larger the swing amplitude of the tail end is, the larger the commonly known deflection is, and further the impeller is in an unbalanced working state, so that the working efficiency of the impeller is not high and the impeller is easy to damage, and the efficiency and the service life of the pump are further reduced; therefore, we add a structure of a support ring at the connecting part 41, through which the driving shaft passes, and the support ring 413 acts like a bushing, and the support ring 413 limits the swing amplitude of the driving shaft; increasing the efficiency and service life of the pump.

Due to the swinging factor, the driving shaft has a deformation stress every time the driving shaft rotates, the driving shaft generates stress fatigue after a long time, and the service life of the driving shaft is shortened; therefore, the driving shaft is made into split connection, namely a plurality of short shafts are connected into a long shaft through the coupling, so that the stress condition of the long shaft is changed, the service life of the whole impeller is prolonged, and the impeller is more convenient to maintain and replace.

Fig. 4 is a sectional view and a partial enlarged view of a barrel assembly for a multistage submersible pump and the multistage submersible pump according to an embodiment of the present invention.

The utility model provides a barrel subassembly for multistage immersible pump in an embodiment, refer to fig. 3 and 4, a plurality of barrels 30 that connect in proper order, be provided with coupling assembling 40 between two adjacent barrels 30; the connecting assembly 40 includes: a connecting member 41 which is an annular cylindrical body, and the upper end of the connecting member 41 extends into the end of the cylinder 30 located on the upper side; the lower end of the connecting member 41 extends into the end of the cylinder 30 located on the lower side; a first fastening member 42 provided at an upper end portion of the connection member 41 and provided on an outer side wall of the connection member 41, for connecting the cartridge 30 to be fitted to an outer side of the connection member 41; a second fastening member 43 provided at a lower end portion of the connection member 41 for connecting the other belt-fitted cylinder 30 to an outer side of the connection member 41; the upper end and the lower end are only taken as examples in the direction of the drawing, and do not limit the present invention.

Referring to fig. 4, that is, the two cylinders 30 may be divided into a first cylinder 31 and a second cylinder 32, the connecting assembly 40 is used to connect the two cylinders, the first cylinder 31 is connected to the outside of the upper end of the connecting part 41 by a first fastening member 42, and the second cylinder 32 is connected to the outside of the lower end of the connecting part 41 by a second fastening member 43.

Therefore, the connecting part 41 is arranged in the barrel to be adapted, the fastener is arranged on the side wall of the barrel, and the barrel does not interfere with the action of an operator during installation or disassembly, so that the disassembly and the installation are more convenient.

Fig. 5 is a partially enlarged view of fig. 4.

Fig. 6 is another partial enlarged view of fig. 4.

Fig. 7 is a schematic structural diagram of a connecting member according to an embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a connecting member according to an embodiment of the present invention

Fig. 9 is a schematic structural view of a bracket according to an embodiment of the present invention.

Fig. 10 is a schematic structural view of a first button according to an embodiment of the present invention.

Fig. 11 is a schematic structural view of a second button according to an embodiment of the present invention.

According to an embodiment of the present invention, referring to fig. 6 to 7, the middle portion of the connecting member 41 is provided with a ring groove 415, and a connecting base 414 is formed on a side wall of the ring groove 415; a plurality of fastener mounting positions II 416 are arranged on the horizontal ring surface of the connecting base 414; the second fastening member 43 includes: a second button 431 and stud 432; the second button 431 partially extends into the sidewall of the barrel 30 and forms a second stem 4312; and a stud 432 passing through the second fastener mounting position 416 of the connecting base 414 and screwed into the second rod 4312, so that the cylinder 30 is connected with the other end of the connecting part 41.

In another embodiment of the present invention, referring to fig. 3, 8 and 9, the first fastening member 42 includes: a first button 422; the first button 422 is provided with: a first cap 4221 attached to an outer wall of a cylinder 30 to be fitted; the second fastening member 43 includes: a second button 431; the second button 431 is provided with: and a second cap part 4311 attached to the outer wall of the other cylinder 30 to be fitted.

Based on the above, the fastener is provided with a button, the button is provided with a cap, the cap is attached to the outer wall of the barrel with the fitting, that is, the cap seals the connection gap between the fastener and the barrel 30, and the cap can prevent external impurities such as dust from entering the inside of the barrel and prevent the internal parts of the barrel 20 from being damaged.

According to an embodiment of the present invention, referring to fig. 4, fig. 5, fig. 7 and fig. 8, a plurality of first fastener mounting positions 417 are disposed on the circumferential annular surface of one end of the connecting member 41; the first fastener 42 includes: a first button 422 and screw 421; the first button 422 partially extends into the side wall of the barrel 30 to be embedded into the first fastener mounting position 417; the screw 421 passes through the first button 422 and is screwed into the fastener mounting position one 417, so that the cylinder 30 is coupled to one end of the coupling member 41.

In another embodiment of the present invention, referring to fig. 5, fig. 7, fig. 8 and fig. 10, a threaded hole is provided in the first fastener mounting position 417, and the threaded hole is: a counter bore 411, wherein the counter bore 411 comprises a blind hole 4111 and a counter bore 4112, and the side wall of the blind hole 4111 is provided with an internal thread; the first button 422 is connected between the screw 421 and the cylinder 20 to be matched; the inner ring of the first button 422 is provided with internal threads; the outer ring of the first button 422 is further provided with a first rod 4222, which is arranged in the counter bore 4112; the screw 421 penetrates through the cylinder 20 to be fitted and the first button 422, so that the first button 422 is attached to the outer wall of the cylinder 20 to be fitted.

Based on the above, the connecting part 41 is provided with the countersunk hole 411, the first button is provided with the first cap part 4221 and the first rod part 4222, and the matching of the countersunk hole and the rod part makes the connection part tighter, thereby further preventing external impurities such as dust from entering the inside of the cylinder.

Referring to fig. 12, the connecting assembly 40 abuts against the impeller assembly 50, and due to the perpendicular force of the stud 432 and the second button 431, the stud 432 pulls the connecting assembly 40 close to the impeller assembly 50, so that the connecting assembly 40 compresses the impeller assembly 50; during the installation, select to change second button 431 and double-screw bolt 432 and be close to each other, further can make barrel and coupling assembling be close to each other, the inside impeller subassembly that is equipped with of barrel, coupling assembling's bottom supports and leans on the impeller subassembly, that is to say, the design of second button and screw bolt can make coupling assembling compress tightly the impeller subassembly.

Specifically, the impeller assembly 50 further includes: the guide vane 51, the guide vane shell 52 and the impeller (not shown in the figure), because the guide vane 51 and the guide vane shell 52 are connected in series, and a plurality of impeller assemblies 50 are connected in series in the pump body 30, that is, a plurality of the above components (the guide vane 51 and the guide vane shell 52) are connected in series in the cylinder body 30, the connection position of the series connection has a certain gap, and the gaps between the impeller assemblies 50 are overlapped, so when the stud 432 is screwed in during installation, the connection assembly is close to the impeller assemblies, further, the bracket 44 presses the impeller assemblies 50 downwards, and the gap between the impeller assemblies can be compressed by the matching of the stud 432 and the second button 431. Further, the material of support 44 is plastics, the material of stator 51 and stator shell 52 is plastics, and plastics have certain compressibility, and the clearance is accumulated can be bigger, and support 44 extrudees simultaneously when stator 51 and stator shell 52, because support 44 is plastics, can protect the stator, avoid the damage to stator 51 or stator shell 52 during the extrusion.

In another embodiment of the present invention, referring to fig. 7 and 8, the connecting member 41 is provided with a pillar 412 and a support ring 413, the support ring 413 is disposed at an inner circle of the connecting member 41 and is concentric with the connecting member 41; the support pillar 412 is disposed between the connecting member 41 and the support ring 413, and the support pillar 412 and the support ring 413 are engaged to increase the strength of the connecting member 41 in the radial direction.

The number of the pillars 412 is plural, including but not limited to 4; the pillars 412 are arranged in a circular array, which the present invention is not limited to.

The drive shaft to be fitted passes through the support ring 413, the support ring 413 then acting like a bushing, and the struts 412 have a reinforcing effect on the support ring 413, i.e. the support ring 413 limits the pivoting amplitude of the drive shaft to be fitted; the balance of the impeller to be matched in operation is improved, the working efficiency of the impeller is increased, the impeller cannot be damaged due to overlarge deflection when the driving shaft rotates, and the efficiency and the service life of the pump are further increased.

Further, since the support column 412 and the support ring 413 have a reinforcing function for the connection member 41 and the cylinder 20 is provided outside the connection member 41, the connection member 41 has a reinforcing and supporting function for the cylinder, and thus, in the case where there is a great pressure difference between the inside and the outside of the cylinder 30 during operation, the cylinder is not deformed by the pressure difference.

In another embodiment of the present invention, referring to fig. 3, 4 and 9, the connecting assembly 40 further includes: a bracket 44 disposed near one end of the second fastening member 43; the bracket 44 is provided with: an outer ring 441 attached to the inner ring of the other tube 30 with fitting; the bracket 44 is further provided with a first rib 442 for supporting the outer ring 441. Referring to fig. 4, the bracket 44 is disposed in the second cylinder 22, that is, the bracket 44 has a reinforcing and supporting function on the second cylinder 22, so as to prevent the cylinder from being deformed due to an excessive difference between internal and external pressures.

Further, the bracket 44 is fixedly connected to the connecting member 41, such as but not limited to a shaft hole fit, and such as but not limited to an interference fit.

Further, the connection member 41 is, for example and without limitation, a pig iron material, or the connection member 41 is, for example and without limitation, a high hardness ceramic material, or the connection member 41 is, for example and without limitation, a high hardness alloy material; the stiffness of the bracket 44 is less than the stiffness of the attachment member 41 and the bracket 44 is for example, but not limited to, a plastic material.

Referring to fig. 7 and 8 and 9, the connection assembly 40 is provided with a support ring 413 and a support column 412 of the connection member 41 to support the first cylinder 21; the connecting assembly is provided with a bracket 44 and a reinforcing rib 442 on the bracket, so that the first cylinder 22 is supported; the split design, and the different materials used for the connecting member 41 and the bracket 44, reduces the manufacturing cost of the entire connecting assembly 40.

In another embodiment of the present invention, referring to fig. 4 to 8, the connecting member 41 is further provided with a connecting base 414; the second fastening member 43 further includes: a stud 432 passing through said connection seat 414 and arranged axially, also understood as longitudinally, with respect to the connection seat 414; the second button 431 is further provided with a second rod part 4312 and a through hole 4313, the through hole 4313 is provided with internal threads, and the through hole 4313 is perpendicular to the second rod part 4312; the stud 432 passes through the connection base 414 to be connected with the through hole 4313, and the second button passes through the second cylinder 32, thereby connecting the second cylinder 32 to the outside of the connection part 41. The connection between the stud 432 and the second button 431 is disposed between two adjacent first reinforcing ribs 442.

In another embodiment of the present invention, referring to fig. 3 to 6, the connecting assembly 40 further includes: and a seal ring 45 provided at an end of the connection assembly 40. Specifically, the side surface of the upper end part of the connecting part 41 is provided with a groove, the side surface of the lower end part of the bracket is provided with another groove, and the sealing ring 45 is arranged in the two grooves, when the cylinder to be adapted is matched with the connecting assembly, the sealing ring can seal the connecting assembly 40, and has the functions of preventing liquid in the pump from flowing out or preventing air from leaking into the pump, so that the leakage of fluid is reduced, and the loss of fluid energy is reduced.

In another embodiment of the present invention, referring to fig. 3, 4 and 6, the connecting assembly 40 further includes: and a positioning component 46 arranged between two adjacent cylinders 20. Specifically, the positioning member 46 has an outer shape adapted to the cross section of the cylinder 20 to be fitted, and further, has an outer diameter greater than or equal to the outer diameter of the cylinder 20. Further, the positioning member 46 is further provided with a positioning through hole 461, and the stud 432 passes through the positioning through hole 461, so that the positioning member 46 and the connecting member 41 are connected to the cylinder 20.

Further, the positioning member 46 has two flat surfaces 462, the two cylinders 20 abut against the flat surfaces 462, and the connecting base 414 abuts against one of the flat surfaces 462; specifically, the lower end of the first cylinder 21 abuts against the upper plane 462, and the connection base 414 abuts against the upper plane 462 thereof, and the upper end of the second cylinder 22 abuts against the lower plane 462, whereby the positioning of the three of the first cylinder 21, the second cylinder 22, and the connection member 41 is achieved. And thus, when the two cylinders 20 to be matched are installed, the positioning is more convenient.

Further, the positioning member 46 abuts against the connecting base 414, and the stud 432 sequentially passes through the base 414, the positioning member 46 and is screwed into the second button 431, and at this time, the shaft of the second button 431 passes through the second cylinder 32, and when the first cylinder 31 abuts against the upper end face of the positioning member 46 and the second cylinder 32 abuts against the lower end face of the positioning member 46, it indicates that the stud 432 and the second button 431 are screwed into place.

The following is an example of the working process during installation, and the present invention is not limited to this:

step one, connecting the second cylinder 32 with the connecting assembly 40:

the second cylinder 32 and the connecting part 41 are abutted against two ends of the positioning part 46, the second button passes through the second mounting hole 202 of the second cylinder 32, the stud 432 passes through the connecting base 414 and the positioning part 46, the stud 432 is screwed into the stud 431, the stud 431 and the second button 431 are screwed, and finally the connecting part is connected with the second cylinder.

Step two, connecting the first cylinder with the connecting assembly:

the first cylinder 31 is abutted against one end face of the positioning component 46 far away from the second cylinder 32, the first button 422 is inserted through the first mounting hole 201 of the first cylinder 31, the first button 422 is placed in the counter bore 411, then the screw 421 is screwed in, and the screw 421 is screwed down, so that the connection between the first cylinder 31 and the connecting component 40 is realized.

When the cylinder needs to be disassembled, in the first step, the connection between the first cylinder 31 and the connection assembly 40 is firstly disassembled, specifically, the screw 421 and the first button 422 are disassembled; in a second step, the second cylinder 32 is connected to the connecting assembly 40, specifically, the stud 431 and the second button 432 are removed. The above removal is for illustration, and the invention is not limited thereto.

The foregoing embodiments are merely preferred embodiments of the present invention, which are not intended to limit the technical implementation of the present invention in any way, and the scope of the present invention is not limited thereby, and those skilled in the art can make modifications or changes without departing from the scope of the technical means disclosed in the present invention, and still should be considered as the substantially same techniques or embodiments as the present invention, so: all equivalent changes made according to the structure, shape and principle of the utility model should be covered within the protection scope of the utility model.

Claims (10)

1. A barrel assembly for a multi-stage submersible pump, comprising a plurality of sequentially connected barrels (30), a connection assembly (40) being provided between two adjacent barrels (30), the connection assembly (40) comprising:

the connecting component (41) is an annular columnar body, and the upper end of the connecting component (41) extends into the end part of the cylinder body (30) positioned on the upper side; the lower end of the connecting component (41) extends into the end part of the cylinder body (30) positioned at the lower side;

the first fastening piece (42) is arranged at one end part of the connecting part (41), is arranged on the outer side wall of the connecting part (41), and is used for connecting the cylinder (30) to be adapted to the outer side of the connecting part (41);

and the second fastening piece (43) is arranged at the other end of the connecting part (41) and is used for connecting the other barrel (30) with the adaptation to the outer side of the connecting part (41).

2. The cartridge assembly for a multistage submersible pump according to claim 1, wherein the connecting member (41) is provided at a middle portion thereof with a ring groove (415), and a side wall of the ring groove (415) forms a connecting seat (414); a plurality of second fastener mounting positions (416) are arranged on the horizontal ring surface of the connecting base (414);

the second fastener (43) comprises: a second button (431) and a stud (432);

the second button (431) partially extends into the side wall of the barrel (30) and forms a second rod part (4312);

and the stud (432) penetrates through the second fastener mounting position (416) of the connecting base (414) and is screwed into the second rod part (4312) so that the cylinder (30) is connected with the other end of the connecting part (41).

3. The cartridge assembly for a multistage submersible pump according to claim 2, wherein the connecting member (41) has a plurality of first fastener mounting locations (417) on a circumferential surface of one end thereof;

the first fastener (42) includes: a first button (422) and a screw (421);

the first button (422) partially extends into the side wall of the barrel (30) and is embedded into the first fastener mounting position (417);

and a screw (421) penetrates through the first button (422) and is screwed into the first fastener mounting position (417), so that the cylinder body (30) is connected with one end of the connecting component (41).

4. The cartridge assembly for a multi-stage submersible pump according to claim 3,

a threaded hole is formed in the first fastener mounting position (417), and the threaded hole is as follows:

the counter bore (411) comprises a blind hole (4111) and a counter bore (4112), and the side wall of the blind hole (4111) is provided with an internal thread;

the first button (422) comprises a cap part (4221) and a first rod part (4222) and is placed in the counter bore (4112); the first cap part (4221) is attached to the outer wall of a cylinder (30) to be matched;

the inner ring of the first button (422) is provided with internal threads;

the screw (421) penetrates through the cylinder (30) to be matched and the first button (422), so that the first button (422) is attached to the outer wall of the cylinder (30) to be matched.

5. A cartridge assembly for a multistage submersible pump according to claim 1, characterized in that the connection member (41) is provided with a strut (412) and a support ring (413), the support ring (413) being arranged at an inner ring of the connection member (41) and concentrically with the connection member (41); the support column (412) is arranged between the connecting part (41) and the support ring (413), and the matching of the support column (412) and the support ring (413) is used for increasing the strength of the connecting part (41) in the radial direction.

6. A cartridge assembly for a multi-stage submersible pump according to claim 1, the connection assembly (40) further comprising: a bracket (44) disposed near one end of the second fastener (43);

the bracket (44) is provided with:

an outer ring (441) attached to the inner ring of the other cylinder (30) with an adapter; and

a first rib (442) for supporting the outer race (441).

7. A cartridge assembly for a multi-stage submersible pump according to claim 6, wherein the connection assembly (40) further comprises: and a seal ring (45) provided at an end of the connection assembly (40).

8. A cartridge assembly for a multi-stage submersible pump according to claim 6, wherein the connection assembly (40) further comprises: the positioning component (46) is arranged between two adjacent cylinders (30);

one side of the positioning member (46) abuts against one side of the connection base (414).

9. The cartridge assembly for a multistage submersible pump according to claim 6, wherein the second button (431) is provided with a second cap portion (4311) and a second stem portion (4312), the second cap portion (4311) fitting the outer wall of the cartridge (30);

the second rod part (4312) is provided with a through hole (4313);

the stud (432) is axially arranged relative to the connecting base (414);

the stud (432) penetrates through the connecting base (414) to be connected with a through hole (4313); the through hole (4313) is provided with internal threads and is perpendicular to the second rod part.

10. A multi-stage submersible pump comprises a driving motor and a pump body; characterized by further comprising a cartridge assembly as claimed in any one of claims 2 to 9; an impeller assembly (50) is arranged in the cylinder assembly, and comprises an impeller, a plurality of impellers are connected in series on a driving shaft, and the driving shaft is connected to an output shaft of the driving motor; the drive shaft includes: a plurality of short shafts which are connected to form a long shaft, and the connection position between the short shafts is positioned at the position of the support ring (413);

the connecting assembly (40) abuts against the impeller assembly (50), the stud (432) is vertically stressed with the second button (431), and the stud (432) pulls the connecting assembly (40) to be close to the impeller assembly (50) so that the connecting assembly (40) is pressed against the impeller assembly (50);

the impeller assembly (50) rests against the bottom of the bracket (44) of the connection assembly (40).

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