CN117404334A - Barrel assembly for multi-stage submersible pump and multi-stage submersible pump - Google Patents

Abstract

The invention relates to the technical field of fluid, and provides a cylinder assembly for a multi-stage submersible pump, which comprises a plurality of cylinders which are sequentially connected, wherein a connecting assembly is arranged between two adjacent cylinders, and the connecting assembly comprises: the connecting part is an annular columnar body, and the upper end of the connecting part extends into the end part of the cylinder body positioned at the upper side; the lower end of the connecting part stretches 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 component and on the outer side wall of the connecting component, and is used for connecting the cylinder body to be matched with the outer side of the connecting component; the second fastener is arranged at the other end of the connecting component and is used for connecting the other cylinder body with the fit on the outer side of the connecting component; the multi-stage submersible pump comprises the cylinder assembly; the structure is convenient to detach and install.

Description

Barrel assembly for multi-stage submersible pump and multi-stage submersible pump

Technical Field

The invention relates to the technical field of fluid, in particular to a barrel assembly for a multi-stage submersible pump and the multi-stage submersible pump.

Background

In the existing water pump field, in order to obtain higher lift, a multi-stage submersible pump is generally adopted, a pump body of the multi-stage submersible pump is formed by connecting a plurality of impellers in series on an output shaft of a motor, and a long cylinder is arranged outside the plurality of impellers; however, when working, the impeller may be blocked by silt or damaged by other factors, and when one impeller is damaged, the other impellers cannot work, and when maintaining, the whole water pump needs to be removed, that is, a certain impeller inside the cylinder cannot be maintained or replaced directly, and the pump body is complicated and troublesome to remove.

In the prior art, the invention with the publication number of CN205895628U and the name of a high-lift multistage deep well submersible pump, as shown in figure 1, comprises a pump body 1, a motor 2 and a machine barrel 3, wherein a plurality of groups of impeller assemblies 11 are arranged in the pump body 1, a cylinder body is arranged outside the impeller assemblies 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 removed, which is troublesome.

2. Because the cylinder is an integral arrangement, the impeller inside the pump body cannot be directly maintained or replaced.

Disclosure of Invention

The invention aims to provide a barrel assembly for a multi-stage submersible pump and the multi-stage submersible pump, so that the impeller is more convenient to maintain.

The purpose of the invention is realized in the following way:

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

In another embodiment of the present invention, a ring groove is provided in the middle of the connecting member, and a connecting base is formed on a side wall of the ring groove; a plurality of fastener installation positions II are arranged on the horizontal ring surface of the connecting base; the second fastener includes: a blind rivet and a stud; the blind rivet part extends into the side wall of the cylinder body and forms a second rod part; and the stud penetrates through the second fastener installation 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 part.

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

In another embodiment of the present invention, a threaded hole is provided in the first fastener installation position, and the threaded hole is: the countersunk head hole comprises a blind hole and a counter bore, and the side wall of the blind hole is provided with an internal thread; 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 body to be matched; an inner ring of the first button is provided with an inner 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 strut and a support ring, and the support ring is disposed on an inner ring of the connecting member and is disposed concentrically with the connecting member; the support posts are arranged between the connecting part and the supporting ring, and the cooperation of the support posts and the supporting ring is used for increasing the strength of the connecting part in the radial direction.

In another embodiment of the present invention, the above connection assembly further includes: the bracket is arranged at one end close to the second fastening piece; the bracket is provided with: an outer ring is attached to the inner ring of the other cylinder body with the fit; and a first reinforcing rib for supporting the outer ring.

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

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

In another embodiment of the invention, the blind rivet is provided with a second cap part and a second rod part, and the second cap part 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 opposite to the connecting base; the screw rod penetrates through the connecting base to be connected with the through hole; the through hole is provided with an internal thread and is perpendicular to the second rod part.

The invention also provides a multistage submersible pump which comprises a driving motor and a pump body; the device also comprises the cylinder assembly; an impeller assembly is arranged in the barrel assembly, the impeller assembly 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 connection part between the short shafts is positioned at the support ring; the connecting component is propped against the impeller component, the screw rod is vertically stressed with the blind rivet, and the screw rod pulls the connecting component to be close to the impeller component and is used for enabling the connecting component to compress the impeller component; the impeller assembly abuts against the bottom of the bracket of the connecting assembly.

Compared with the prior art, the invention has the following outstanding and beneficial technical effects:

1. based on the above, the connecting component is arranged in the cylinder, the fastening piece is arranged on the side wall of the cylinder, and the cylinder can not obstruct the action of an operator during installation or disassembly, so that the disassembly and the installation are more convenient.

2. Based on the above, the fastener is provided with the button, first button and blind rivet, two buttons are equipped with the cap portion, and the cap portion laminating is in the barrel outer wall of taking the adaptation, and the cap portion is used for preventing external impurity like dust entering barrel's inside, avoids harm inside spare part.

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

4. Based on the above, the connection assembly is divided into two parts: the connecting component and the support are provided with reinforcing ribs for supporting the outer ring, the outer ring is attached to the inner ring of the other cylinder body with the adaptation, the strength of the other cylinder body is enhanced, and the deformation of the cylinder body caused by overlarge pressure difference between the inner and outer sides is prevented.

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

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

8. Further, based on the above, during installation, the blind rivet and the stud are close to each other, and further can make barrel and coupling assembling be close to each other, and the barrel is inside to be equipped with impeller subassembly, and the bottom of coupling assembling is supported and is leaned on impeller subassembly, that is to say, the design of blind rivet and stud can make coupling assembling compress tightly impeller subassembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed 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 other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a prior art high lift multi-stage deep well submersible pump.

FIG. 2 is a schematic diagram of a multi-stage submersible pump according to one embodiment of the invention.

FIG. 3 is a schematic diagram of an explosion structure of a multi-stage submersible pump and a connection assembly for the multi-stage submersible pump according to an embodiment of the invention.

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

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

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

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

Fig. 8 is a schematic structural view 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 view of a blind rivet according to an embodiment of the present invention.

FIG. 12 is a schematic cross-sectional view of a multi-stage submersible pump according to one embodiment of the invention.

Description of the drawings:

1. a pump body; 2. a motor; 3. a barrel; 4. an oil cup; 5. clamping springs; 6. a pump head; 7. an upper end portion; 8. a connection part; 9. a lower end portion; 10. a transmission shaft; 11. an impeller assembly; 12. a bracket; 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 prevention 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. and a motor shaft.

110-a connector; 22-water inlet; 112-a drive motor mounting portion; 33-pump body mounting; 30-a cylinder; 31-a first cylinder; 32-a second cylinder; 40-connecting assembly; 41-connecting parts; 42-a first fastener; 43-a second fastener; 44-a bracket; 45-sealing rings; 46-positioning part; 47-stud; 48-sealing rings;

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

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

411-countersink; 4111-blind hole; 4112—counter bore; 412-a pillar; 413-a support ring; 414-connecting the base; 415-ring groove; 416-fastener installation site two; 417-fastener installation site one;

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

431-blind rivet; 432-stud; 4311-a second cap; 4312-a second stem; 4313-vias;

441-outer ring; 442-first reinforcing ribs; 461-positioning through holes; 462-plane;

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

Detailed Description

The foregoing and other technical aspects, features and advantages of the present invention will be apparent from the following detailed description of a preferred embodiment, which is to be read in connection with the accompanying drawings. The directional terms mentioned in the following embodiments are, for example: upper, lower, left, right, front, rear, interior or exterior, etc., are merely references to the directions of the drawings. Thus, the directional terminology is used for purposes of illustration and is not intended to be limiting of the invention.

The invention is further described in the following examples with reference to the accompanying drawings:

fig. 1 is a schematic diagram of a prior art high lift multi-stage submersible pump.

In the existing water pump field, in order to obtain a higher lift, a multi-stage submersible pump is generally adopted, a pump body 1 of the multi-stage submersible pump is connected in series with a motor shaft 27 by a plurality of impeller assemblies 11, and a long barrel is arranged outside the plurality of impellers and is not shown in the drawing; however, when in operation, the impeller may be blocked by silt or damaged by other factors, and when one impeller is damaged, the other impellers cannot work, and when in maintenance, the whole water pump needs to be removed, that is, a certain impeller in the cylinder cannot be directly maintained or replaced, and the pump body is complicated and troublesome to remove.

Accordingly, the present invention provides a barrel assembly for a multi-stage submersible pump and a multi-stage submersible pump for solving the above problems. The method of splitting one cylinder into a plurality of short cylinders is adopted, one or a plurality of impellers are arranged in each cylinder, and therefore, when in maintenance, only a single short cylinder is required to be removed, and the maintenance efficiency is improved.

FIG. 2 is a schematic view of a multi-stage submersible pump according to one embodiment of the invention;

FIG. 3 is a schematic diagram of a cartridge assembly for a multi-stage submersible pump and an exploded view of the multi-stage submersible pump in accordance with one embodiment of the invention.

FIG. 12 is a schematic cross-sectional view of a multi-stage submersible pump according to one embodiment of the invention.

Referring to fig. 2 and 12, in one embodiment of the present invention, a multi-stage submersible pump is provided, comprising a drive motor and a pump body; an impeller assembly 50 is arranged in the pump body, 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 cylinder 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, wherein the connecting piece 110 is made of raw iron 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 intensity between the impeller and the water inlet 22 is reduced, water is sucked into the pump body, and the water is output in the pump body to the opening.

Referring to fig. 3, the pump cartridge includes: the cylinder bodies 30 are annular columnar bodies, and a first mounting hole 201 and a second mounting hole 202 are formed in the side wall of each cylinder body 30; the two cylinders are connected by a connecting assembly 40, the connecting assembly 40 comprising: a connecting member 41, a first fastener 42, and a second fastener 43, the first fastener 42 passing through the first mounting hole 201 to connect a cylinder 20 with the connecting member 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 cylinders 30, and one or a plurality of impellers are arranged in each cylinder 30, so that when the impellers are maintained, only a single short cylinder is required to be removed, and the whole pump body is not required to be disassembled, thereby improving the maintenance efficiency; and the side walls of the cylinders are provided with mounting holes, and the two cylinders are connected to the two ends of the connecting part 41, that is, when the two fasteners are detached and mounted, the cylinders do not obstruct workers, and are easier to detach and mount.

Referring to fig. 5, the connection member 41 is provided with a stay 412 and a support ring 413, the support ring 413 being disposed concentrically with the connection member 41; the strut 412 is disposed between the connecting member 41 and the support ring 413, and the strut 412 is used for increasing the strength of the connecting member in the radial direction; and the drive shaft includes: the short shafts are connected to form a long shaft, and the connection part between the short shafts passes through the support ring. Referring to fig. 12, the connection assembly 40 abuts against the impeller assembly 50, and the screw 432 pulls the connection assembly 40 close to the impeller assembly 50 due to the vertical force of the screw 432 and the rivet 431, so that the connection assembly 40 compresses the impeller assembly 50; the impeller assembly 50 abuts 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; the longer the pump body is; further the longer the drive shaft; when the driving shaft rotates, the larger the swing amplitude of the tail end is, the larger the common name is, the deflection is, and then the impeller is in an unbalanced working state, so that the working efficiency of the impeller is low and is easy to damage, and the efficiency and the service life of the pump are further reduced; thus, we add a structure of a supporting ring at the connecting part 41 through which the driving shaft passes, in which case the supporting ring 413 acts like a bushing, the supporting ring 413 limiting the swing amplitude of the driving shaft; the efficiency and service life of the pump are increased.

And because of the factor of swinging, the driving shaft has a deformation stress each time, and the driving shaft can generate stress fatigue after a long time, thus reducing the service life of the driving shaft; therefore, the driving shaft is made into split connection, namely, a plurality of short shafts are connected into a long shaft through the coupler, so that the stress condition of the long shaft is changed, the whole service life is further prolonged, and the impeller is more convenient to maintain and replace.

FIG. 4 is a cross-sectional view and partial enlarged view of a barrel assembly for a multi-stage submersible pump and a multi-stage submersible pump in accordance with one embodiment of the invention.

In one embodiment of the present invention, a cylinder assembly for a multi-stage submersible pump is provided, referring to fig. 3 and 4, a plurality of cylinders 30 are sequentially connected, and a connection assembly 40 is disposed between two adjacent cylinders 30; the connection assembly 40 includes: the connecting part 41 is an annular columnar body, and the upper end of the connecting part 41 extends into the end part of the cylinder 30 positioned at the upper side; the lower end of the connecting member 41 extends into the end of the cylinder 30 located at the lower side; a first fastener 42 provided at an upper end portion of the connection member 41 and on an outer side wall of the connection member 41 for connecting the cylinder 30 to be fitted to an outer side of the connection member 41; a second fastener 43 provided at a lower end portion of the connection member 41 for connecting the other band-fitted cylinder 30 to an outside of the connection member 41; the upper end and the lower end are merely 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 connection assembly 40 is used to connect the two cylinders, the first cylinder 31 is connected to the outside of the upper end of the connection member 41 by a first fastener 42, and the second cylinder 32 is connected to the outside of the lower end of the connection member 41 by a second fastener 43.

Therefore, the connecting member 41 is provided in the cylinder to be fitted, and the fastener is provided on the side wall of the cylinder, so that the cylinder does not interfere with the action of the operator when being mounted or dismounted, and the dismounting and mounting are made more convenient.

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

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

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

FIG. 8 is a schematic view 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 view of the structure of a blind rivet according to an embodiment of the present invention.

In an embodiment of the present invention, referring to fig. 6 to 7, the middle part of the connecting member 41 is provided with a ring groove 415, and a side wall of the ring groove 415 forms a connecting base 414; a plurality of fastener installation positions II 416 are arranged on the horizontal ring surface of the connecting base 414; the second fastening member 43 includes: a pull stud 431 and a stud 432; the blind rivet 431 partially extends into the side wall of the barrel 30 and forms a second stem 4312; the stud 432 passes through the second fastener mounting portion 416 of the connection base 414 and is screwed into the second rod portion 4312, so that the cylinder 30 is connected to the other end of the connection member 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: the first cap 4221 is attached to the outer wall of a cylinder 30 to be fitted; the second fastening member 43 includes: a blind rivet 431; the blind rivet 431 is provided with: the second cap 4311 is attached to the outer wall of the other cylinder 30 to be fitted.

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

In an embodiment of the present invention, referring to fig. 4, 5, 7 and 8, a plurality of fastener installation locations 417 are provided on a circumferential surface of one end of the connecting member 41; the first fastener 42 includes: a first button 422 and a screw 421; the first button 422 extends partially into the sidewall of the barrel 30 and engages the fastener mounting location one 417; the screw 421 passes through the first button 422 and is screwed into the fastener installation site one 417 so that the cylinder 30 is connected to one end of the connection member 41.

In another embodiment of the present invention, referring to fig. 5, 7, 8 and 10, the fastener installation site 417 is provided with a threaded hole therein, and the threaded hole is: a countersunk hole 411, wherein the countersunk hole 411 comprises a blind hole 4111 and a countersunk hole 4112, and the side wall of the blind hole 4111 is provided with internal threads; the first button 422 is connected between the screw 421 and the cylinder 20 to be fitted; an inner ring of the first button 422 is provided with an inner thread; the outer ring of the first button 422 is further provided with a first rod portion 4222 which is arranged in the counter bore 4112; the screw 421 passes 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 member 41 is provided with a countersunk hole 411, and the first button is provided with a first cap portion 4221 and a first rod portion 4222, and the countersunk hole and the rod portion cooperate to make the connection more tight, so as to further prevent external impurities such as dust from entering the interior of the cylinder.

Referring to fig. 12, the connection assembly 40 abuts against the impeller assembly 50, and the screw 432 pulls the connection assembly 40 close to the impeller assembly 50 due to the vertical force of the screw 432 and the rivet 431, so that the connection assembly 40 compresses the impeller assembly 50; during installation, the rotation selecting blind rivet 431 and the stud 432 are close to each other, the barrel and the connecting component are further close to each other, the impeller component is arranged in the barrel, the bottom of the connecting component abuts against the impeller component, that is, the blind rivet and the stud are designed, and the connecting component can be pressed tightly against the impeller component.

Specifically, the impeller assembly 50 further includes: since the guide vane 51, the guide vane shell 52 and the impeller (not shown in the figure) are connected in series, the plurality of impeller assemblies 50 are connected in series in the pump body 30, that is, the plurality of components (the guide vane 51 and the guide vane shell 52) are connected in series in the cylinder body 30, a certain gap is formed at the connecting part of the series, and the gaps between the plurality of impeller assemblies 50 are overlapped, so that when the screw 432 is screwed in during installation, the connecting assembly is close to the impeller assemblies, further, the bracket 44 can press the impeller assemblies 50 downwards, and the cooperation of the screw 432 and the blind rivet 431 can compress the gap between the impeller assemblies. Further, the material of the bracket 44 is plastic, the material of the guide vane 51 and the guide vane shell 52 is plastic, the plastic has a certain compressibility, the gap accumulation is larger, and meanwhile, when the bracket 44 extrudes the guide vane 51 and the guide vane shell 52, the bracket 44 is plastic, so that the guide vane can be protected, and the damage to the guide vane 51 or the guide vane shell 52 during extrusion is avoided.

In another embodiment of the present invention, referring to fig. 7 and 8, the above-mentioned connection member 41 is provided with a support column 412 and a support ring 413, and the support ring 413 is provided at an inner ring of the connection member 41 and is disposed concentrically with the connection member 41; the support posts 412 are provided between the connection member 41 and the support ring 413, and the cooperation of the support posts 412 and the support ring 413 serves to increase the strength of the connection member 41 in the radial direction.

The struts 412 are a plurality including, but not limited to, 4; the struts 412 are arranged in an annular array, but the invention is not limited thereto.

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 stiffening effect on the support ring 413, that is to say the support ring 413 limits the amplitude of the oscillation of the drive shaft to be fitted; the balance of the impeller to be adapted in the working process is improved, the working efficiency of the impeller is improved, 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 improved.

Further, since the support posts 412 and the support rings 413 have a reinforcing effect on the connection member 41 and the cylinder 20 is provided outside the connection member 41, the connection member 41 has a reinforcing and supporting effect on the cylinder at this time, and thus, when the cylinder 30 is operated with a large pressure difference inside and outside, the cylinder is not deformed by the pressure difference.

In another embodiment of the present invention, referring to fig. 3, 4 and 9, the connection assembly 40 further includes: a bracket 44 disposed at one end near the second fastener 43; the bracket 44 is provided with: an outer ring 441 fitted with the inner ring of the other tube 30 with the fit; the bracket 44 is further provided with a first reinforcing 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 to prevent the cylinder from being deformed due to an excessive difference between internal and external pressures.

Further, the bracket 44 is fixedly coupled 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 connecting member 41 is, for example, but not limited to, a pig iron material, or the connecting member 41 is, for example, but not limited to, a high-hardness ceramic material, or the connecting member 41 is, for example, but not limited to, a high-hardness alloy material; the hardness of the bracket 44 is smaller than that of the connection 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 stay 412 of the connection member 41, realizing the support of the first cylinder 21; the connecting component is provided with a bracket 44 and a reinforcing rib 442 on the bracket, so that the first cylinder 22 is supported; this split design, and the use of different materials for the connecting member 41 and the bracket 44, reduces the manufacturing cost of the overall connection assembly 40.

In another embodiment of the present invention, referring to fig. 4 to 8, the connecting component 41 is further provided with a connecting base 414; the second fastener 43 further includes: a stud 432 passing through the connection base 414 and axially disposed relative to the connection base 414, also understood as longitudinally disposed; the pull pin 431 is further provided with a second rod portion 4312 and a through hole 4313, the through hole 4313 is provided with an internal thread, and the through hole 4313 is perpendicular to the second rod portion 4312; the stud 432 is connected to the through hole 4313 through the connection base 414, and the blind rivet is passed through the second cylinder 32, thereby achieving connection of the second cylinder 32 to the outside of the connection member 41. The connection between the stud 432 and the blind rivet 431 is disposed between two adjacent first reinforcing ribs 442.

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

In another embodiment of the present invention, referring to fig. 3 and 4 and 6, the connection assembly 40 further includes: the positioning member 46 is disposed between two adjacent cylinders 20. Specifically, the positioning member 46 has an outer shape that matches the cross-section of the barrel 20 to be fitted, and further has an outer diameter that is greater than or equal to the outer diameter of the barrel 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 to connect the positioning member 46 with the connecting member 41 and 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 positioning of the first cylinder 21, the second cylinder 22, and the connecting member 41 is achieved by the lower end of the first cylinder 21 abutting against the upper plane 462, and the connecting base 414 abutting against the upper plane 462 thereof, and the upper end of the second cylinder 22 abutting against the lower plane 462. And further, the two cylinders 20 to be matched are more convenient to position during installation.

Further, the positioning member 46 abuts against the connection base 414, the stud 432 passes through the base 414, the positioning portion 46 and the pull nail 431 is screwed in, at this time, the rod portion of the pull nail 431 passes through the second cylinder 32, and when the first cylinder 31 abuts against the upper end face of the positioning portion 46, and the second cylinder 32 abuts against the lower end face of the positioning portion 46, it indicates that the stud 432 and the pull nail 431 have been screwed in place.

The following illustrates the working procedure during installation, but the invention is not limited thereto:

step one, the second cylinder 32 is connected 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 blind rivet penetrates through the second mounting hole 202 of the second cylinder 32, the stud 432 penetrates through the connecting base 414 and the positioning part 46, the stud 432 is screwed in, the stud 431 and the blind rivet 431 are screwed, and finally the connection of the connecting part and the second cylinder is achieved.

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

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

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

The above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in any way, and any person skilled in the art should be able to make some changes or modifications to the embodiments disclosed in the present invention without departing from the scope of the technical means disclosed in the present invention, and the invention is not limited to the embodiments described in the present invention, and therefore, the present invention is not limited to the embodiments described in the present invention. All equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims (10)

1. A barrel assembly for a multistage 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) stretches into the end part of the cylinder body (30) positioned at the upper side; the lower end of the connecting component (41) extends into the end part of the cylinder (30) positioned at the lower side;

a first fastener (42) provided at one end of the connecting member (41) and provided on an outer side wall of the connecting member (41) for connecting the cylinder (30) to be fitted to an outer side of the connecting member (41);

and a second fastener (43) provided at the other end of the connecting member (41) for connecting the other barrel (30) with the fitting to the outside of the connecting member (41).

2. A cartridge assembly for a multi-stage submersible pump according to claim 1, wherein the connecting member (41) is provided with a ring groove (415) in the middle thereof, and a connecting base (414) is formed on the side wall of the ring groove (415); a plurality of fastener installation positions II (416) are arranged on the horizontal ring surface of the connecting base (414);

the second fastener (43) includes: a blind rivet (431) and a stud (432);

the blind rivet (431) partially extends into the side wall of the cylinder (30) and forms a second rod part (4312);

and a stud (432) which passes through the fastener mounting position II (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 component (41).

3. A cartridge assembly for a multi-stage submersible pump according to claim 2, wherein the connecting member (41) has a plurality of fastener mounting locations (417) provided on a circumferential annular surface at one end thereof;

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

the first button (422) is partially inserted into the side wall of the cylinder (30) and is embedded into the fastener installation position I (417);

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

4. A cartridge assembly for a multi-stage submersible pump as recited in claim 3, wherein,

the fastener installation position one (417) is internally provided with a threaded hole, and the threaded hole is:

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

the first button (422) comprises a cap portion (4221) and a first stem portion (4222) disposed in the counterbore (4112); the first cap part (4221) is attached to the outer wall of a cylinder body (30) to be matched;

an inner ring of the first button (422) is provided with an inner thread;

the screw (421) penetrates through the cylinder (20) 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 multi-stage submersible pump according to claim 1, wherein the connecting member (41) is provided with a support post (412) and a support ring (413), the support ring (413) being provided at an inner ring of the connecting member (41) and being arranged concentrically to the connecting member (41); the support column (412) is arranged between the connecting component (41) and the support ring (413), and the cooperation of the support column (412) and the support ring (413) is used for increasing the strength of the connecting component (41) in the radial direction.

6. A connection assembly according to claim 1, wherein the connection assembly (40) further comprises: a bracket (44) provided 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 (20) with the fit; and

and first reinforcing ribs (442) for supporting the outer ring (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 the end of the connection assembly (40).

8. A connection assembly according to claim 6, wherein the connection assembly (40) further comprises: a positioning member (46) provided between the adjacent two cylinders (30);

one side of the positioning part (46) is abutted against one side of the connecting base (414).

9. The barrel assembly of the multi-stage submersible pump according to claim 6, wherein the blind rivet (431) is provided with a second cap (4311) and a second rod (4312), and the second cap (4311) is attached to the outer wall of the barrel (30);

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

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

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

10. A multistage submersible pump comprises a driving motor and a pump body; a cartridge assembly according to any one of claims 2 to 9; an impeller assembly (50) is arranged in the barrel assembly, the impeller assembly is provided with 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 connection part between the short shafts is positioned at the support ring (413);

the connecting assembly (40) is abutted against the impeller assembly (50), the screw rod (432) is vertically stressed by the blind rivet (431), and the screw rod (432) pulls the connecting assembly (40) to be close to the impeller assembly (50) so as to enable the connecting assembly (40) to press the impeller assembly (50);

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