CN113202779A

CN113202779A - Multistage centrifugal pump with fast-assembly sealing mechanism and method

Info

Publication number: CN113202779A
Application number: CN202110548927.9A
Authority: CN
Inventors: 蒲雪计; 贺路路
Original assignee: Individual
Current assignee: Shanxi Wojin New Materials Co ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-08-03
Anticipated expiration: 2041-05-20
Also published as: CN113202779B

Abstract

The invention relates to the field of multistage centrifugal pump devices, and discloses a multistage centrifugal pump with a quick-mounting sealing mechanism and a method, wherein a rubber cover can realize the purposes of conveniently sealing a hard rubber cylinder and quickly mounting and dismounting the sealing mechanism through the arrangement of a sealing ring, a first sealing groove, a second sealing groove and the like, a fixed cylinder is enabled to counteract partial vibration generated by the hard rubber cylinder under the combined action of a buffer spring, a damping spring and the like, so that the vibration generated by liquid in a pump body and the hard rubber cylinder is effectively reduced, the damage of the centrifugal pump sealing mechanism is prevented from being aggravated, the purpose of quickly mounting and dismounting a motor is realized through the arrangement of a connecting hole, a horizontal limiting bolt, a tensioning spring and the like, the liquid in the multistage centrifugal pump body is discharged at high pressure through a water outlet pipe through the arrangement of an inner impeller and an outer impeller, so that the pressurization of the sucked liquid is completed, through the setting of arc piece and perpendicular spacing bolt etc for the motor position is more firm, has effectively improved the holistic stability of multistage centrifugal pump.

Description

Multistage centrifugal pump with fast-assembly sealing mechanism and method

Technical Field

The invention relates to the field of multistage centrifugal pump devices, in particular to a multistage centrifugal pump with a quick-assembly sealing mechanism and a method.

Background

The multistage centrifugal pump is a medium conveying device which can make flowing medium (gas and liquid, also can be mixture of suspended particles and gas or liquid) enter from the root portion (inlet) of blade rotating shaft, the medium can obtain centrifugal force by means of high-speed rotating blade to produce a high pressure and can be flowed out from pressure-releasing hole (outlet), and is characterized by that the above-mentioned two pumps with identical function are combined together, and on the fluid channel structure the medium pressure-releasing hole of first stage is communicated with inlet of second stage, and the medium pressure-releasing hole of second stage is communicated with inlet of third stage, so that the series-connected mechanism can be formed into multistage centrifugal pump.

In the prior art, the mechanical seal maintenance process of the multistage centrifugal pump is complex, the assembled mechanical seal is ensured to be leak-free, the checking of the mechanical seal technical dimension is indispensable, the process generally refers to the measurement of the dimensions of the sealing surfaces of the moving ring and the static ring, the clearance between the moving ring and the static ring and the shaft or the shaft sleeve is checked, the mechanical seal tightness checking and the measurement of whether the length of the compensation spring changes or not are performed, the length of the anti-rotation pin of the static ring and the depth of the pin hole are finally measured, the situation that the pin is too long and the static ring cannot be assembled in place is prevented, the whole mechanical seal process is complex and difficult to operate, the working speed is seriously influenced by time and labor consumption, the shaft of the multistage centrifugal pump is very long, the conditions of insufficient shaft rigidity, too large deflection and poor shafting straightness are easily caused, the collision between the moving part and the static part is caused to generate vibration, in addition, the multistage pump shaft is too long, the influence of the impact of flowing water in a water pool is great, make the vibration of part under water increase, the balance disc clearance of axle head is too big, perhaps axial work float volume adjustment is improper, can cause axle low frequency float, lead to the axle bush vibration, the eccentricity of rotation axis, can lead to the bending vibration of axle, the effect through liquid medium leads to the whole low frequency vibrations of the pump body then, be in easily leading to pump body leakproofness to damage after this state for a long time, thereby multistage centrifugal pump's life has been shortened, on the other hand, it depends on the bolt more to be connected between traditional driving motor and the centrifugal pump power shaft, the loading and unloading motor of being not convenient for when needing to maintain and clear up, therefore, we disclose a multistage centrifugal pump with ready-package sealing mechanism and satisfy market demand.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the multistage centrifugal pump with the fast-assembly sealing mechanism, which has the advantages of convenient assembly and disassembly of the sealing mechanism and the like, and solves the problems of difficulty in disassembly of the sealing mechanism and the like.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a multistage centrifugal pump with a quick-assembly sealing mechanism comprises a bottom plate, wherein the top of the bottom plate is fixedly connected with a base, the top of the bottom plate is fixedly connected with four supporting columns, the top ends of the four supporting columns are fixedly connected with a same top plate, the outer wall of the base is provided with a water inlet hole, a water inlet pipe is fixedly sleeved in the water inlet hole, one end of the water inlet pipe extends into the water inlet hole, the other end of the water inlet pipe extends out of the water inlet hole, the top of the base and the bottom of the top plate are both fixedly connected with a same fixing cylinder, the top of the top plate is fixedly connected with four inclined supporting plates, the top ends of the four inclined supporting plates are both fixedly connected with a same fixing ring, the top of the fixing ring is provided with a conjunction ring, the top of the conjunction ring is fixedly connected with a motor, and the outer wall of the motor is fixedly connected with three arc-shaped blocks, three evenly distributed three conjunction holes are formed in the tops of the three arc-shaped blocks, the tops of the fixing rings and the tops of the conjunction rings, and vertical limiting bolts are sleeved in the three conjunction holes in the same position in a sliding mode.

Preferably, the output end of the motor is fixedly connected with an input shaft through an internal coupler thereof, the bottom end of the input shaft is provided with a matching groove, the outer wall of the input shaft is fixedly connected with a connecting block, the outer walls of the connecting block and the input shaft are both provided with horizontal limiting holes, the horizontal limiting holes on the input shaft are communicated with the matching groove, the two horizontal limiting holes are both sleeved with a same horizontal limiting bolt in a sliding manner, two ends of the horizontal limiting bolt respectively penetrate through the two horizontal limiting holes and respectively extend out of the two horizontal limiting holes, the horizontal limiting bolt is sleeved with a tensioning spring in a sliding manner, two ends of the tensioning spring are respectively and fixedly connected to one end of the horizontal limiting bolt and the connecting block, a power shaft is arranged in the matching groove, the outer wall of the power shaft is provided with a connecting hole, and the position of the connecting hole corresponds to the positions of the two horizontal limiting holes, and a horizontal limiting bolt is sleeved in the connecting hole in a sliding manner.

Preferably, the power shaft is fixedly sleeved with a plurality of uniformly distributed inner impellers and outer impellers, the top of the base is fixedly connected with a rigid rubber cylinder, the inner impeller and the outer impeller are positioned in the rigid rubber cylinder, the outer wall of the rigid rubber cylinder is fixedly connected with a plurality of uniformly distributed inner fixed blocks, one side of each inner fixed block is fixedly connected with an inner sliding column, a plurality of outer fixed blocks that distribute evenly of fixedly connected with on the inner wall of a fixed section of thick bamboo, it is a plurality of outer fixed block is corresponding with a plurality of interior fixed block position is corresponding, a plurality of the equal fixedly connected with outer traveller in one side of outer fixed block, it is a plurality of the sliding tray has all been seted up to the one end of interior traveller, and is a plurality of the one end of outer traveller extends to a plurality of respectively in the sliding tray, it is a plurality of buffer spring has all slided to cup joint on the outer traveller, and is a plurality of buffer spring's both ends difference fixed connection is a plurality of corresponding on interior fixed block and the outer fixed block.

Preferably, four lugs are fixedly connected to the outer wall of the rigid rubber cylinder, four T-shaped blocks are fixedly connected to the top of the base, four rectangular grooves are formed in the tops of the T-shaped blocks, four damping springs are fixedly connected to the inner wall of one side of each rectangular groove, and one ends of the lugs are located in the four rectangular grooves respectively and are in contact with one ends of the damping springs respectively.

Preferably, the outer walls of the fixed cylinder and the rigid rubber cylinder are provided with water outlets, two water outlets are sleeved with the same water outlet pipe in a sliding manner, and two ends of the water outlet pipe penetrate through the two water outlets and extend to the outside of the two water outlets respectively.

Preferably, four connecting rods that distribute evenly, four fixedly connected with on the inner wall of rigid rubber tube the same retainer plate of the other end fixedly connected with of connecting rod, the fixed cup has connect the bearing in the retainer plate, the bottom of power shaft runs through the bearing and extends to outside the bearing, four the same sealing washer of the equal fixedly connected with in top side of connecting rod, first seal groove has been seted up on the top side of sealing washer.

Preferably, a second sealing groove is formed in the top side of the rigid rubber cylinder, a rubber cover is arranged at the top of the rigid rubber cylinder, an inner convex ring is fixedly connected to the inner wall of the bottom side of the rubber cover, and the inner convex ring and the rubber cover are respectively located in the first sealing groove and the second sealing groove and are respectively attached to the inner walls of the first sealing groove and the second sealing groove.

Preferably, the top side of rubber lid has been seted up and has been led to the shaft hole, the both ends of power shaft all run through lead to the shaft hole and extend to respectively outside the both sides that lead to the shaft hole, two upper limit rings of the outer wall fixedly connected with of rubber lid, two lower limit rings of the outer wall fixedly connected with of rigid rubber section of thick bamboo, two upper limit ring and two the position of lower limit ring is corresponding.

Preferably, the top sides of the upper limiting ring and the lower limiting ring are provided with fixing holes, two sealing bolts are sleeved in the fixing holes at the same position in a sliding mode, rectangular holes are formed in the outer walls of the two sealing bolts, two rectangular blocks are arranged in the rectangular holes, one end of each rectangular block in the same rectangular hole extends to the outside of the two sides of the rectangular hole, and the two rectangular blocks on the same side are fixedly connected with the same limiting spring.

(III) advantageous effects

Compared with the prior art, the invention provides a multistage centrifugal pump with a quick-assembly sealing mechanism, which has the following beneficial effects:

1. this kind of multistage centrifugal pump with ready-package sealing mechanism, through the setting such as sealing washer and first seal groove and second seal groove, make the rubber lid can realize the purpose of the hard rubber section of thick bamboo of convenient sealing, and simultaneously, through inwards pressing the rectangular block, under the effect of spacing spring, the rectangular block removes to in the rectangular hole, upwards extract the sealed bolt and can easily relieve the spacing relation between rubber lid and the hard rubber section of thick bamboo, thereby realize quick loading and unloading sealing mechanism's purpose, not only labour saving and time saving but also easily operation.

2. This a multistage centrifugal pump with ready-package sealing mechanism, liquid drives the rigid rubber tube under centrifugal force effect and carries out low frequency vibration, thereby make the rigid rubber tube take place elastic vibration, drive outer fixed block and outer traveller constantly extrude buffer spring, and the lug constantly extrudees damping spring, under buffer spring and damping spring's combined action, make the fixed cylinder offset the partial vibration that the rigid rubber tube produced, thereby effectively alleviate the vibrations that the inside liquid of pump body and rigid rubber tube produced, prevent that damage from appearing in the centrifugal pump sealing mechanism short time, then the life of multistage centrifugal pump has indirectly been increased.

3. This kind of multistage centrifugal pump with ready-package sealing mechanism, through the setting of connecting hole and horizontal spacing bolt and taut spring etc. for operating personnel only need outwards slightly pull out the one end of horizontal spacing bolt and can extract horizontal spacing bolt from horizontal spacing downthehole, thereby realize the purpose of fast loading and unloading motor, make things convenient for the later stage to dismantle maintenance and clearance multistage centrifugal pump.

4. This multistage centrifugal pump with ready-package sealing mechanism, through the setting of inlet tube and outlet pipe, make inlet tube and the convenient and multistage centrifugal pump that is linked together of outlet pipe, behind the starter motor, the motor drives the input shaft through its inside shaft coupling and rotates, the input shaft rotates the back drive rather than fixed connection's interior impeller and outer impeller rotation, thereby make the multistage centrifugal pump body inhale liquid to the pump body through the inlet tube inside, under the combined action of interior impeller and outer impeller, make this internal liquid of multistage centrifugal pump discharge through the outlet pipe high pressure, thereby accomplish and carry out the pressure boost to inhaling liquid.

5. This kind of multistage centrifugal pump with ready-package sealing mechanism through the setting of arc piece and perpendicular spacing bolt for the motor position is more fixed, has effectively improved the holistic stability of multistage centrifugal pump, has improved the life of centrifugal pump to a certain extent.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a partial perspective view of the present invention from a first perspective;

FIG. 3 is a partial perspective view of the present invention from a second perspective;

FIG. 4 is a schematic view of a third perspective partially cut away in accordance with the present invention;

FIG. 5 is a schematic perspective view of a rubber cylinder according to the present invention;

FIG. 6 is a schematic view of a three-dimensional structure of a rubber cylinder and a rubber cover according to the present invention;

FIG. 7 is a schematic perspective view of an outer impeller and a seal ring according to the present invention;

FIG. 8 is a partially cut-away perspective view of the outer and inner impellers of the present invention;

FIG. 9 is a perspective view of the inner impeller of the present invention;

FIG. 10 is a schematic perspective view of a motor and a fitting ring according to the present invention;

FIG. 11 is a schematic perspective view of a bearing and a first seal groove of the present invention;

FIG. 12 is a schematic view of a three-dimensional structure of a rubber cover and an inner collar according to the present invention;

FIG. 13 is a schematic perspective view of a rectangular block according to the present invention;

FIG. 14 is an enlarged perspective view taken at A of FIG. 1;

FIG. 15 is an enlarged perspective view of FIG. 4 at B according to the present invention;

fig. 16 is a partially enlarged perspective view of fig. 4 according to the present invention.

In the figure: 1. a base plate; 2. a base; 3. a pillar; 4. a water inlet pipe; 5. a top plate; 6. a fixed cylinder; 7. a diagonal bracing plate; 8. a fixing ring; 9. a loop is engaged; 10. a motor; 11. an arc-shaped block; 12. a vertical limit bolt; 13. an input shaft; 14. a fitting groove; 15. connecting blocks; 16. a horizontal limit bolt; 17. tensioning the spring; 18. a power shaft; 19. connecting holes; 20. an inner impeller; 21. an outer impeller; 22. a hard rubber cylinder; 23. a through shaft hole; 24. an inner fixed block; 25. an inner strut; 26. an outer fixed block; 27. an outer strut; 28. a buffer spring; 29. a bump; 30. a T-shaped block; 31. a damping spring; 32. a water outlet pipe; 33. a connecting rod; 34. a stationary ring; 35. a bearing; 36. a seal ring; 37. a first seal groove; 38. a second seal groove; 39. a rubber cover; 40. an inner collar; 41. an upper limiting ring; 42. a lower limit ring; 43. a fixing hole; 44. sealing the bolt; 45. a rectangular hole; 46. a rectangular block; 47. a limiting spring; 48. fitting the hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As described in the background of the invention, there are shortcomings in the prior art, and in order to solve the above technical problems, the present application proposes a multistage centrifugal pump having a quick-assembly type sealing mechanism.

Example 1

In a typical embodiment of the present application, as shown in fig. 1 to 16, a multistage centrifugal pump with a fast-assembly sealing mechanism comprises a bottom plate 1, a base 2 is fixedly connected to the top of the bottom plate 1, four pillars 3 are fixedly connected to the top of the bottom plate 1, the top ends of the four pillars 3 are fixedly connected with a same top plate 5, the outer wall of the base 2 is provided with a water inlet, a water inlet pipe 4 is fixedly sleeved in the water inlet, one end of the water inlet pipe 4 extends into the water inlet, the other end of the water inlet pipe 4 extends out of the water inlet, the top of the base 2 and the bottom of the top plate 5 are both fixedly connected with a same fixing cylinder 6, the top of the top plate 5 is fixedly connected with four inclined supporting plates 7, the top ends of the four inclined supporting plates 7 are both fixedly connected with a same fixing ring 8, the top of the fixing ring 8 is provided with a fitting ring 9, and the top of the fitting ring 9 is fixedly connected with a motor 10, the three arc pieces 11 of outer wall fixedly connected with of motor 10, three evenly distributed three agreeing with the hole 48 all seted up at the top of three arc piece 11 and the top of solid fixed ring 8 and the top of agreeing with ring 9, and the perpendicular spacing bolt 12 has all been cup jointed in the three agreeing with hole 48 of same position to the equal slip.

Further, in the above scheme, the output end of the motor 10 is fixedly connected with an input shaft 13 through an internal coupling, the bottom end of the input shaft 13 is provided with a fitting groove 14, the outer wall of the input shaft 13 is fixedly connected with a connecting block 15, the outer walls of the connecting block 15 and the input shaft 13 are both provided with horizontal limiting holes, the horizontal limiting hole on the input shaft 13 is communicated with the fitting groove 14, the two horizontal limiting holes are both sleeved with a same horizontal limiting bolt 16 in a sliding manner, both ends of the horizontal limiting bolt 16 respectively penetrate through the two horizontal limiting holes and respectively extend out of the two horizontal limiting holes, the horizontal limiting bolt 16 is sleeved with a tensioning spring 17 in a sliding manner, both ends of the tensioning spring 17 are respectively and fixedly connected to one end of the horizontal limiting bolt 16 and the connecting block 15, a power shaft 18 is arranged in the fitting groove 14, the outer wall of the power shaft 18 is provided with a connecting hole 19, the position of the connecting hole 19 corresponds to the positions of the two horizontal limiting holes, a horizontal limiting bolt 16 is sleeved in the connecting hole 19 in a sliding manner.

Further, in the above-mentioned scheme, the fixed cover has been connected with a plurality of even inner impeller 20 and outer impeller 21 of distribution on power shaft 18, the top fixedly connected with rigid rubber tube 22 of base 2, inner impeller 20 is located rigid rubber tube 22 with outer impeller 21, the outer wall fixedly connected with a plurality of even inner fixed block 24 of distribution of rigid rubber tube 22, the equal fixedly connected with interior traveller 25 in one side of a plurality of inner fixed block 24, fixedly connected with a plurality of even outer fixed block 26 of distribution on the inner wall of fixed cylinder 6, a plurality of outer fixed block 26 are corresponding with a plurality of inner fixed block 24 positions respectively, the equal fixedly connected with outer traveller 27 in one side of a plurality of outer fixed block 26, the sliding tray has all been seted up to the one end of a plurality of inner travelers 25, the one end of a plurality of outer travelers 27 extends to a plurality of sliding trays respectively, buffer spring 28 has all slidingly been cup jointed on a plurality of outer travelers 27, the both ends of a plurality of buffer spring 28 are fixed connection respectively on a plurality of corresponding inner fixed block 24 and outer fixed block 26.

Further, in the above-mentioned scheme, four lugs 29 of outer wall fixedly connected with of hard rubber tube 22, four T type pieces 30 of top fixedly connected with of base 2, the rectangular channel has all been seted up at four T type pieces 30's top, equal fixedly connected with damping spring 31 on one side inner wall of four rectangular channels, the one end of four lugs 29 is located four rectangular channels respectively and contacts with four damping spring 31's one end respectively, through lug 29 and damping spring 31's setting, can weaken vibrations when making the inside vibrations that produce of centrifugal pump, then indirect life who has prolonged the centrifugal pump.

Further, in the above scheme, the apopore has all been seted up with the outer wall of rigid rubber section of thick bamboo 22 to fixed section of thick bamboo 6, and equal slip has cup jointed same outlet pipe 32 in two outlet holes, and two apopores are all run through and extend to outside two apopores respectively at the both ends of outlet pipe 32, through the setting of outlet pipe 32 for the inside liquid of multistage centrifugal pump is followed outlet pipe 32 and is located the high pressure blowout.

Further, in the above scheme, four evenly distributed connecting rods 33 of fixedly connected with on the inner wall of hard rubber tube 22, the same retainer plate 34 of the other end fixedly connected with of four connecting rods 33, fixed the cup joint has bearing 35 in the retainer plate 34, the bottom of power shaft 18 runs through bearing 35 and extends to outside bearing 35, the same sealing washer 36 of the equal fixedly connected with in top side of four connecting rods 33, first seal groove 37 has been seted up to the top side of sealing washer 36, through the setting of connecting rod 33 with retainer plate 34, make.

Further, in the above scheme, a second sealing groove 38 is formed in the top side of the hard rubber tube 22, a rubber cover 39 is arranged at the top of the hard rubber tube 22, an inner collar 40 is fixedly connected to the inner wall of the bottom side of the rubber cover 39, the inner collar 40 and the rubber cover 39 are respectively located in the first sealing groove 37 and the second sealing groove 38 and respectively attached to the inner walls of the first sealing groove 37 and the second sealing groove 38, and the sealing effect of the multistage centrifugal pump is better through the arrangement of the inner collar 40, the rubber cover 39, the first sealing groove 37 and the second sealing groove 38.

Further, in the above scheme, the through-shaft hole 23 has been seted up on the top side of rubber lid 39, outside power shaft 18's both ends all passed through-shaft hole 23 and extended to the both sides in through-shaft hole 23 respectively, two upper limit rings 41 of the outer wall fixedly connected with of rubber lid 39, two lower limit rings 42 of the outer wall fixedly connected with of hard rubber tube 22, two upper limit rings 41 are corresponding with two lower limit rings 42's position, through the setting of upper limit ring 41 and lower limit ring 42, make rubber lid 39 can realize swift sealed hard rubber tube 22 and compress tightly it.

Further, in the above-mentioned scheme, the fixed orifices 43 have all been seted up with the top side of two lower limit rings 42 to the upper limit ring 41, sealed tie 44 has been cup jointed in two fixed orifices 43 of same position, rectangular hole 45 has all been seted up to the outer wall of two sealed ties 44, all be equipped with two rectangular blocks 46 in two rectangular holes 45, the one end of two rectangular blocks 46 in the same rectangular hole 45 extends to outside the both sides of rectangular hole 45 respectively, the same spacing spring 47 of fixedly connected with between two rectangular blocks 46 with one side, setting through spacing spring 47, make operating personnel can realize through sealed tie 44 locking rubber lid 39 and rigid rubber tube 22 through pressing rectangular block 46.

When using, through the setting of inlet tube 4 and outlet pipe 32, make the inlet tube be linked together with multistage centrifugal pump with the outlet pipe is convenient, after the starter motor 10, motor 10 drives input shaft 13 through its inside shaft coupling and rotates, input shaft 13 rotates the back drive rather than fixed connection's interior impeller 20 and outer impeller 21 and rotates, thereby make multistage centrifugal pump body through inlet tube 4 with liquid suction to pump body inside, under the combined action of interior impeller 20 and outer impeller 21, make this internal liquid of multistage centrifugal pump through outlet pipe 32 high pressure discharge, thereby accomplish and carry out the pressure boost to the suction liquid.

When the multistage centrifugal pump is used for a long time, low-frequency vibration is generated in the centrifugal pump body due to self reasons and the influence of the flow rate of high-pressure liquid, then the liquid drives the hard rubber tube 22 to perform low-frequency vibration under the action of centrifugal force, so that the hard rubber tube 22 generates elastic vibration, the outer fixed block 26 and the outer sliding column 27 are driven to continuously extrude the buffer spring 28, the bump 29 continuously extrudes the shock absorption spring 31, under the combined action of the buffer spring 28 and the shock absorption spring 31, the fixed tube 6 offsets partial vibration generated by the hard rubber tube 22, thereby effectively reducing the vibration generated by the liquid in the pump body and the hard rubber tube 22, preventing the sealing mechanism of the centrifugal pump from being damaged in a short time, further indirectly prolonging the service life of the multistage centrifugal pump, and through the arrangement of the bearing 35, the fixed ring 34 and the four connecting rods 33, the input shaft 13 drives the power shaft 18 to rotate more stably, the power shaft 18 is prevented from shifting after the multistage centrifugal pump works for a long time, so that the vibration of the centrifugal pump body is aggravated, the whole service life of the centrifugal pump is influenced, and the rubber cover 39 can conveniently seal the hard rubber tube 22 through the arrangement of the sealing ring 36, the first sealing groove 37, the second sealing groove 38 and the like.

When the sealing mechanism is used, the rectangular block 46 is pressed inwards, the rectangular block 46 moves into the rectangular hole 45 under the action of the limiting spring 47, and the sealing bolt 44 is pulled upwards to easily release the limiting relation between the rubber cover 39 and the hard rubber tube 22, so that the aim of quickly assembling and disassembling the sealing mechanism is fulfilled, time and labor are saved, and the sealing mechanism is easy to operate.

When the motor is used, the connecting hole 19, the horizontal limiting bolt 16, the tensioning spring 17 and the like are arranged, so that an operator only needs to slightly pull out one end of the horizontal limiting bolt 16 outwards to pull out the horizontal limiting bolt 16 from the horizontal limiting hole, the purpose of rapidly assembling and disassembling the motor 10 is achieved, and the multistage centrifugal pump is convenient to disassemble and clean in the later stage.

When the centrifugal pump is used, the motor 10 is fixed more through the arrangement of the arc-shaped block 11 and the vertical limiting bolt 12, the overall stability of the multistage centrifugal pump is effectively improved, and the service life of the centrifugal pump is prolonged to a certain extent.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A multistage centrifugal pump with a quick-fit sealing mechanism, comprising a base plate (1), characterized in that: the top of the base plate (1) is fixedly connected with a base (2), the top of the base plate (1) is fixedly connected with four pillars (3), the top of the four pillars (3) is fixedly connected with a same top plate (5), the outer wall of the base (2) is provided with a water inlet hole, the water inlet hole is fixedly sleeved with a water inlet pipe (4), the top of the base (2) and the bottom of the top plate (5) are both fixedly connected with a same fixed cylinder (6), the top of the top plate (5) is fixedly connected with four inclined supporting plates (7), the top of the four inclined supporting plates (7) is both fixedly connected with a same fixed ring (8), the top of the fixed ring (8) is provided with a conjunction ring (9), the top of the conjunction ring (9) is fixedly connected with a motor (10), the outer wall of the motor (10) is fixedly connected with three arc-shaped blocks (11), three evenly distributed three conjunction holes (48) are respectively formed in the tops of the three arc-shaped blocks (11), the tops of the fixing rings (8) and the tops of the conjunction rings (9), and vertical limiting bolts (12) are respectively sleeved in the three conjunction holes (48) in the same position in a sliding mode.

2. The multistage centrifugal pump with a quick-fit sealing mechanism according to claim 1, characterized in that: the output end of the motor (10) is fixedly connected with an input shaft (13) through an internal coupler of the motor, the bottom end of the input shaft (13) is provided with a conjunction groove (14), the outer wall of the input shaft (13) is fixedly connected with a connecting block (15), the outer walls of the connecting block (15) and the input shaft (13) are provided with horizontal limiting holes, the horizontal limiting holes in the input shaft (13) are communicated with the conjunction groove (14), the two horizontal limiting holes are internally sleeved with a same horizontal limiting bolt (16) in a sliding manner, two ends of the horizontal limiting bolt (16) respectively penetrate through the two horizontal limiting holes and respectively extend out of the two horizontal limiting holes, a tensioning spring (17) is sleeved on the horizontal limiting bolt (16) in a sliding manner, and two ends of the tensioning spring (17) are respectively and fixedly connected to one end of the horizontal limiting bolt (16) and the connecting block (15), a power shaft (18) is arranged in the fit groove (14), a connecting hole (19) is formed in the outer wall of the power shaft (18), the position of the connecting hole (19) corresponds to the position of the two horizontal limiting holes, and a horizontal limiting bolt (16) is sleeved in the connecting hole (19) in a sliding mode.

3. A multistage centrifugal pump with a quick-fit seal mechanism according to claim 2, wherein: the utility model discloses a power shaft, including power shaft (18), fixed cover and have been connect a plurality of interior impeller (20) and outer impeller (21) that distribute evenly, the hard rubber section of thick bamboo (22) of top fixedly connected with of base (2), interior impeller (20) with outer impeller (21) are located in hard rubber section of thick bamboo (22), the outer wall fixedly connected with of hard rubber section of thick bamboo (22) a plurality of interior fixed block (24) that distribute evenly, it is a plurality of one side of interior fixed block (24) is equal fixedly connected with interior traveller (25), fixedly connected with a plurality of outer fixed block (26) that distribute evenly on the inner wall of fixed section of thick bamboo (6), it is a plurality of outer fixed block (26) are corresponding with a plurality of interior fixed block (24) position respectively, it is a plurality of equal fixedly connected with outer traveller (27) one side of outer fixed block (26), it is a plurality of the sliding tray has all been seted up to the one end of interior traveller (25), it is a plurality of the one end of outer traveller (27) extends to a plurality of respectively in the sliding tray, it is a plurality of all slip the cup joint buffer spring (28) on outer traveller (27), it is a plurality of the both ends of buffer spring (28) are fixed connection respectively in a plurality of corresponding on interior fixed block (24) and outer fixed block (26).

4. A multistage centrifugal pump with a quick-fit seal mechanism according to claim 3, wherein: four lugs (29) of outer wall fixedly connected with of hard rubber tube (22), four T type pieces (30) of top fixedly connected with of base (2), four the rectangular channel has all been seted up at the top of T type piece (30), four equal fixedly connected with damping spring (31), four on one side inner wall of rectangular channel the one end of lug (29) is located four respectively the rectangular channel in and respectively with four the one end of damping spring (31) contacts.

5. A multistage centrifugal pump with a quick-fit seal mechanism according to claim 3, wherein: the outer wall of the fixed cylinder (6) and the outer wall of the hard rubber cylinder (22) are provided with water outlet holes matched with each other, and the water outlet holes are internally sleeved with the same water outlet pipe (32) in a sliding manner.

6. A multistage centrifugal pump with a quick-fit seal mechanism according to claim 3, wherein: four even connecting rods (33) of distribution of fixedly connected with on the inner wall of hard rubber tube (22), four the same retainer plate (34) of the other end fixedly connected with of connecting rod (33), fixed cover has connect bearing (35) in retainer plate (34), the bottom of power shaft (18) is run through bearing (35) and extend to outside bearing (35), four the same sealing washer (36) of the equal fixedly connected with in top side of connecting rod (33), first seal groove (37) have been seted up on the top side of sealing washer (36).

7. A multistage centrifugal pump with a quick-fit seal mechanism according to claim 3, wherein: second seal groove (38) have been seted up to the top side of hard rubber tube (22), the top of hard rubber tube (22) is equipped with rubber lid (39), fixedly connected with inner collar (40) on the bottom side inner wall of rubber lid (39), inner collar (40) with rubber lid (39) are located respectively in first seal groove (37) and second seal groove (38) and respectively with the inner wall of first seal groove (37) and second seal groove (38) is laminated mutually.

8. The multistage centrifugal pump with a quick-fit sealing mechanism of claim 7, wherein: lead to shaft hole (23) have been seted up to the top side of rubber lid (39), the both ends of power shaft (18) all run through lead to shaft hole (23) and extend to respectively outside the both sides that lead to shaft hole (23), spacing ring (41) are gone up to two outer wall fixedly connected with of rubber lid (39), spacing ring (42) are down two to the outer wall fixedly connected with of hard rubber tube (22), two go up spacing ring (41) and two the position of spacing ring (42) is corresponding down.

9. The multistage centrifugal pump with a quick-fit sealing mechanism of claim 8, wherein: two go up spacing ring (41) and two fixed orifices (43), two of same position have all been seted up to the top side of lower spacing ring (42) slide in fixed orifices (43) and have cup jointed sealed bolt (44), two rectangular hole (45), two have all been seted up to the outer wall of sealed bolt (44) all be equipped with two rectangular blocks (46), it is same in rectangular hole (45) two in rectangular hole (45 the one end of rectangular block (46) extends to respectively outside the both sides of rectangular hole (45), two with one side fixedly connected with is same spacing spring (47) between rectangular block (46).