CN113202779B

CN113202779B - Multistage centrifugal pump with quick-assembly sealing mechanism and method

Info

Publication number: CN113202779B
Application number: CN202110548927.9A
Authority: CN
Inventors: 蒲雪计; 贺路路
Original assignee: Shanxi Wojin New Materials Co ltd
Current assignee: Shanxi Wojin New Materials Co ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2023-08-29
Anticipated expiration: 2041-05-20
Also published as: CN113202779A

Abstract

The application relates to the field of multistage centrifugal pump devices and discloses a multistage centrifugal pump with a quick-assembly type sealing mechanism and a method thereof, wherein a rubber cover can conveniently seal a hard rubber cylinder and realize the purpose of quickly assembling and disassembling the sealing mechanism through the arrangement of a sealing ring, a first sealing groove, a second sealing groove and the like, a fixed cylinder counteracts part of vibration generated by the hard rubber cylinder under the combined action of a buffer spring, a damping spring and the like, thereby effectively reducing the vibration generated by liquid in a pump body and the hard rubber cylinder, preventing the damage of the centrifugal pump sealing mechanism from being aggravated, realizing the purpose of quickly assembling and disassembling a motor through the arrangement of a connecting hole, a horizontal limiting bolt, a tensioning spring and the like, enabling liquid in a multistage centrifugal pump body to be discharged at high pressure through a water outlet pipe, and further completing the pressurization of sucked liquid through the arrangement of an arc block, the position of the motor is firmer, and the overall stability of the multistage centrifugal pump is effectively improved.

Description

Multistage centrifugal pump with quick-assembly sealing mechanism and method

Technical Field

The application 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 is characterized in that flowing media (gas and liquid or a mixture of suspended particles and gas or liquid) enter from the root (inlet) of a blade rotating shaft, the media obtain centrifugal force by means of a high-speed rotating blade to generate high pressure, and the medium flows out of a pressure relief opening (outlet), the multistage centrifugal pump is formed by integrating more than two pumps with the same function, and in a fluid channel structure, a medium pressure relief opening of a first stage is communicated with an inlet of a second stage, a medium pressure relief opening of the second stage is communicated with an inlet of a third stage, and the mechanism connected in series in this way forms the multistage centrifugal pump.

In the prior art, the mechanical seal maintenance process of the multistage centrifugal pump is complex, the assembled mechanical seal is required to be free from leakage, the checking of the mechanical seal technical size is indispensable, the process generally refers to checking the clearance between a moving ring, a static ring and a shaft or a shaft sleeve after measuring the sizes of the moving ring and the static ring sealing surfaces, checking whether the lengths of compensating springs are changed or not and finally measuring the lengths of static ring anti-rotation pins and the depths of pin holes, preventing the pins from being excessively long, the static rings can not be assembled in place, the whole mechanical seal process is complex and difficult to operate, the working speed is seriously influenced, the shaft of the multistage centrifugal pump is extremely long, the shaft rigidity is easily insufficient, the deflection is too large, the straightness of a shaft system is poor, friction between a moving part and a static part is caused, in addition, the multistage pump shaft is too long, the influence of flowing water impact in the water tank is larger, the vibration of the underwater part is increased, the clearance of a balance disc at the shaft end is overlarge, or the axial working movement is improperly adjusted, the shaft is caused to move at a low frequency, the bearing bush is vibrated, the eccentric of a rotating shaft can cause the bending vibration of the shaft, the whole pump body is caused to vibrate at a low frequency through the action of a liquid medium, the sealing performance of the pump body is damaged easily after the multistage pump is in the state for a long time, and therefore the service life of the multistage centrifugal pump is shortened, on the other hand, the connection between a traditional driving motor and a centrifugal pump power shaft depends on more bolts, and the motor is inconvenient to assemble and disassemble when the maintenance and the cleaning are needed.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the application provides a multistage centrifugal pump with a quick-assembly type sealing mechanism, which has the advantages of convenient assembly and disassembly of the sealing mechanism and the like, and solves the problems of difficult disassembly of the sealing mechanism and the like.

(II) technical scheme

In order to achieve the above purpose, the present application provides the following technical solutions: the utility model provides a multistage centrifugal pump with fast-assembling sealing mechanism, includes the bottom plate, the top fixedly connected with base of bottom plate, four the top fixedly connected with of bottom plate four pillars, the same roof of top fixedly connected with of pillar, the inlet opening has been seted up to the outer wall of base, inlet tube has been cup jointed to the inlet opening internal fixation, the one end of inlet tube extends to in the inlet opening, the other end of inlet tube extends to outside the inlet opening, the top of base with the equal fixedly connected with of bottom of roof is the same fixed cylinder, the top fixedly connected with of roof four inclined strut boards, four the equal fixedly connected with of top of inclined strut board is the same solid fixed ring, the top of gu fixed ring is equipped with the agreeing ring, the top fixedly connected with motor of agreeing ring, the outer wall fixedly connected with of motor three arc piece, three the top of arc piece and the top of gu ring with the equal three agreeing ring's top has all been offered and has been evenly distributed three agreeing with the hole, and all has cup jointed the perpendicular plug that slides on the same position.

Preferably, the output of motor is through its inside shaft coupling fixedly connected with input shaft, the agreeing with groove has been seted up to the bottom of input shaft, the outer wall fixedly connected with connecting block of input shaft, the connecting block reaches the outer wall of input shaft has all been seted up horizontal spacing hole, epaxial horizontal spacing hole of input with the agreeing with the groove and be linked together, two the downthehole same horizontal spacing bolt that has all been slided and cup jointed of horizontal spacing, two are run through respectively to horizontal spacing hole and extend to respectively outside the horizontal spacing hole at the both ends of horizontal spacing bolt, the last tensioning spring that has slided and cup jointed of horizontal spacing bolt, the both ends of tensioning spring are fixedly connected with respectively on the horizontal spacing bolt one end with on the connecting block, be equipped with the power shaft in the agreeing with the inslot, the connecting hole has been seted up to the outer wall of power shaft, the position of connecting hole is corresponding with two the position of horizontal spacing hole, the downthehole slip has cup jointed horizontal spacing bolt.

Preferably, a plurality of evenly distributed inner impellers and outer impellers are fixedly sleeved on the power shaft, the top of the base is fixedly connected with a hard rubber cylinder, the inner impellers and the outer impellers are located in the hard rubber cylinder, a plurality of evenly distributed inner fixing blocks are fixedly connected to the outer wall of the hard rubber cylinder, a plurality of outer fixing blocks are fixedly connected to one side of each inner fixing block, a plurality of evenly distributed outer fixing blocks are fixedly connected to the inner wall of the fixing cylinder, the outer fixing blocks correspond to the inner fixing blocks respectively in position, one sides of the outer fixing blocks are fixedly connected with outer sliding columns, sliding grooves are formed in one ends of the inner sliding columns, one ends of the outer sliding columns extend into the sliding grooves respectively, buffer springs are fixedly sleeved on the outer sliding columns in a sliding mode, and two ends of the buffer springs are fixedly connected to the corresponding inner fixing blocks and the outer fixing blocks respectively.

Preferably, the outer wall fixedly connected with four lugs of hard rubber section of thick bamboo, four T type pieces of top fixedly connected with of base, four rectangular channel has all been seted up at the top of T type piece, four all fixedly connected with damping spring on the inner wall of one side of rectangular channel, four the one end of lug is located four respectively rectangular channel and with four respectively damping spring's one end contacts.

Preferably, the fixed cylinder and the outer wall of the hard rubber cylinder are provided with water outlet holes, two water outlet holes 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 outlet holes and extend out of the two water outlet holes respectively.

Preferably, four connecting rods which are uniformly distributed are fixedly connected to the inner wall of the hard rubber cylinder, the other ends of the four connecting rods are fixedly connected with the same fixing ring, bearings are fixedly sleeved in the fixing rings, the bottom ends of the power shafts penetrate through the bearings and extend out of the bearings, the top sides of the four connecting rods are fixedly connected with the same sealing ring, and the top sides of the sealing rings are provided with first sealing grooves.

Preferably, the second seal groove has been seted up to the top side of hard rubber section of thick bamboo, the top of hard rubber section of thick bamboo is equipped with the rubber lid, fixedly connected with internal convex ring on the bottom side inner wall of rubber lid, internal convex ring with the rubber lid is located respectively first seal groove and second seal groove and respectively with the inner wall of first seal groove and second seal groove laminating mutually.

Preferably, the through shaft hole is seted up on the top side of rubber lid, the both ends of power shaft all run through the through shaft hole and extend respectively outside the both sides of through shaft hole, the outer wall fixedly connected with of rubber lid two go up the spacing ring, the outer wall fixedly connected with of hard rubber barrel two down the spacing ring, two go up the spacing ring with two the position of spacing ring down corresponds.

Preferably, the fixed orifices have all been seted up to two go up the spacing ring with two the top side of spacing ring down, two of coplanar have been seted up in the fixed orifices slip and have been cup jointed the sealing bolt, two the rectangular hole has all been seted up to the outer wall of sealing bolt, two all be equipped with two rectangle pieces in the rectangular hole, same two in the rectangular hole the one end of rectangle piece extends to respectively outside the both sides of rectangular hole, two of coplanar fixedly connected with one spacing spring between the rectangle piece.

(III) beneficial effects

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

1. this multistage centrifugal pump with fast-assembling sealing mechanism, through setting up such as sealing washer and first seal groove and second seal groove for the rubber lid can realize convenient sealed hard rubber section of thick bamboo's purpose, simultaneously, through inwards pressing the rectangular piece, in the rectangular piece removes the rectangular hole under limit spring's effect, upwards pulls out the sealing plug and can easily remove the spacing relation between rubber lid and the hard rubber section of thick bamboo, thereby realizes fast loading and unloading sealing mechanism's purpose, not only labour saving and time saving but also easily operation.

2. This multistage centrifugal pump with fast-assembling sealing mechanism, liquid drives hard rubber section of thick bamboo under centrifugal force effect and carries out low frequency vibration, thereby make hard rubber section of thick bamboo take place elastic vibration, drive external fixation piece and outer smooth post constantly extrude buffer spring, and the lug constantly extrudees buffer spring, under buffer spring and buffer spring's combined action, make fixed section of thick bamboo offset the partial vibration that hard rubber section of thick bamboo produced, thereby effectively alleviate the vibrations that the inside liquid of pump body and hard rubber section of thick bamboo produced, prevent that centrifugal pump sealing mechanism from appearing damaging in the short time, then indirectly prolonged multistage centrifugal pump's life.

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

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

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

Drawings

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

FIG. 2 is a schematic perspective view of a first view part of the present application;

FIG. 3 is a schematic perspective view of a second view part of the present application;

FIG. 4 is a schematic view of a third perspective partially cut-away perspective of the present application;

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

FIG. 6 is a schematic perspective view of a rubber cylinder and a rubber cover according to the present application;

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

FIG. 8 is a schematic view of the outer impeller and inner impeller of the present application in partial cutaway;

FIG. 9 is a schematic perspective view of an inner impeller of the present application;

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

FIG. 11 is a schematic view of a bearing and a first seal groove according to the present application;

FIG. 12 is a schematic perspective view of a rubber cap and an inner collar of the present application;

FIG. 13 is a schematic perspective view of a rectangular block of the present application;

FIG. 14 is an enlarged perspective view of the structure of FIG. 1A according to the present application;

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

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

In the figure: 1. a bottom plate; 2. a base; 3. a support post; 4. a water inlet pipe; 5. a top plate; 6. a fixed cylinder; 7. a diagonal brace plate; 8. a fixing ring; 9. a mating ring; 10. a motor; 11. an arc-shaped block; 12. a vertical limit bolt; 13. an input shaft; 14. a fitting groove; 15. a connecting block; 16. a horizontal limit bolt; 17. tensioning the spring; 18. a power shaft; 19. a connection hole; 20. an inner impeller; 21. an outer impeller; 22. a hard rubber cylinder; 23. a through shaft hole; 24. an inner fixing block; 25. an inner slide; 26. an outer fixing 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 fixing 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 convex ring; 41. an upper limit ring; 42. a lower limit ring; 43. a fixing hole; 44. a sealing bolt; 45. a rectangular hole; 46. rectangular blocks; 47. a limit spring; 48. fitting the hole.

Detailed Description

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

As described in the background art, the present application provides a multistage centrifugal pump with a quick-assembly type sealing mechanism, which solves the above-mentioned problems.

Example 1

In a typical embodiment of the present application, as shown in fig. 1-16, a multistage centrifugal pump with a quick-assembly sealing mechanism includes a bottom plate 1, a base 2 is fixedly connected to the top of the bottom plate 1, four struts 3 are fixedly connected to the top of the bottom plate 1, the top of the four struts 3 are fixedly connected to the same top plate 5, a water inlet hole is formed in the outer wall of the base 2, a water inlet pipe 4 is fixedly sleeved in the water inlet hole, one end of the water inlet pipe 4 extends into the water inlet hole, the other end of the water inlet pipe 4 extends out of the water inlet hole, the top of the base 2 and the bottom of the top plate 5 are fixedly connected to the same fixed cylinder 6, four inclined strut plates 7 are fixedly connected to the top of the top plate 5, the same fixed ring 8 is fixedly connected to the top of the four inclined strut plates 7, the top of the fixed ring 8 is provided with a fitting ring 9, a motor 10 is fixedly connected to the outer wall of the motor 10, three arc blocks 11 are fixedly connected to the top of the three arc blocks 11 and the top of the fixed ring 8 and the top of the fitting ring 9 are respectively provided with three fitting holes 48 which are uniformly distributed, and three fitting holes 48 are respectively and three vertical sliding bolts 48 are respectively connected to the same positions.

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

Further, in the above-mentioned scheme, a plurality of evenly distributed inner impellers 20 and outer impellers 21 are fixedly sleeved on the power shaft 18, the top of the base 2 is fixedly connected with a hard rubber cylinder 22, the inner impellers 20 and the outer impellers 21 are located in the hard rubber cylinder 22, a plurality of evenly distributed inner fixing blocks 24 are fixedly connected to the outer wall of the hard rubber cylinder 22, an inner slide column 25 is fixedly connected to one side of each of the plurality of inner fixing blocks 24, a plurality of evenly distributed outer fixing blocks 26 are fixedly connected to the inner wall of the fixing cylinder 6, the plurality of outer fixing blocks 26 respectively correspond to the positions of the plurality of inner fixing blocks 24, outer slide columns 27 are fixedly connected to one side of each of the plurality of outer fixing blocks 26, sliding grooves are formed in one ends of the plurality of inner slide columns 25, one ends of the plurality of outer slide columns 27 respectively extend into the plurality of sliding grooves, buffer springs 28 are respectively and fixedly connected to the corresponding plurality of inner fixing blocks 24 and outer fixing blocks 26 in a sliding manner.

Further, in the above-mentioned scheme, four lugs 29 of outer wall fixedly connected with of hard rubber cylinder 22, four T type pieces 30 of top fixedly connected with of base 2, rectangular channel has all been seted up at the top of four T type pieces 30, all fixedly connected with damping spring 31 on the inner wall of one side of four rectangular channels, the one end of four lugs 29 is located four rectangular channel respectively and contacts with the one end of four damping spring 31 respectively, through the setting of lug 29 and damping spring 31, can weaken vibrations when making the centrifugal pump inside produce vibrations, and then indirectly prolonged the life of centrifugal pump.

Further, in the above scheme, the outer walls of the fixed cylinder 6 and the hard rubber cylinder 22 are provided with water outlet holes, the two water outlet holes are sleeved with the same water outlet pipe 32 in a sliding manner, two ends of the water outlet pipe 32 penetrate through the two water outlet holes and extend out of the two water outlet holes respectively, and through the arrangement of the water outlet pipe 32, liquid in the multistage centrifugal pump is sprayed out from the water outlet pipe 32 under high pressure.

Further, in the above scheme, four evenly distributed connecting rods 33 are fixedly connected to the inner wall of the hard rubber cylinder 22, the other ends of the four connecting rods 33 are fixedly connected with the same fixing ring 34, bearings 35 are fixedly sleeved in the fixing rings 34, the bottom ends of the power shafts 18 penetrate through the bearings 35 and extend out of the bearings 35, the top sides of the four connecting rods 33 are fixedly connected with the same sealing ring 36, the top sides of the sealing rings 36 are provided with first sealing grooves 37, and the arrangement of the connecting rods 33 and the fixing rings 34 is adopted.

Further, in the above-mentioned scheme, the second seal groove 38 has 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 interior bulge loop 40 on the bottom side inner wall of rubber lid 39, interior bulge loop 40 and rubber lid 39 are located first seal groove 37 and second seal groove 38 respectively and laminate with the inner wall of first seal groove 37 and second seal groove 38 respectively, through interior bulge loop 40 and rubber lid 39 and the setting of first seal groove 37 and second seal groove 38, make multistage centrifugal pump's sealed effect better.

Further, in the above-mentioned scheme, the through-hole 23 has been seted up to the topside of rubber lid 39, the both ends of power shaft 18 all run through-hole 23 and extend respectively outside the both sides of through-hole 23, the outer wall fixedly connected with of rubber lid 39 two go up spacing ring 41, the outer wall fixedly connected with of hard rubber cylinder 22 is two spacing ring 42 down, two go up spacing ring 41 and two spacing ring 42 down the position correspondence, through the setting of last spacing ring 41 and spacing ring 42 down for rubber lid 39 can realize swift sealed hard rubber cylinder 22 and compress tightly it.

Further, in the above-mentioned scheme, the fixed orifices 43 are all offered on the top side of last spacing ring 41 and two lower spacing rings 42, the sealing bolt 44 has been cup jointed in the sliding in two fixed orifices 43 of coplanar, rectangular hole 45 has all been offered to the outer wall of two sealing bolts 44, all be equipped with two rectangular pieces 46 in two rectangular holes 45, the one end of two rectangular pieces 46 in the same rectangular hole 45 extends to outside the both sides of rectangular hole 45 respectively, fixedly connected with same spacing spring 47 between two rectangular pieces 46 of coplanar, through the setting of spacing spring 47, make operating personnel through sealing bolt 44 locking rubber lid 39 and hard rubber section of thick bamboo 22 can be realized through pressing rectangular piece 46.

When the multistage centrifugal pump is used, through the arrangement of the water inlet pipe 4 and the water outlet pipe 32, the water inlet pipe and the water outlet pipe are convenient to be communicated with the multistage centrifugal pump, after the motor 10 is started, the motor 10 drives the input shaft 13 to rotate through the internal coupler, the input shaft 13 drives the inner impeller 20 and the outer impeller 21 fixedly connected with the input shaft to rotate after rotating, so that the multistage centrifugal pump body sucks liquid into the pump body through the water inlet pipe 4, and under the combined action of the inner impeller 20 and the outer impeller 21, the liquid in the multistage centrifugal pump body is discharged at high pressure through the water outlet pipe 32, and the supercharging of the sucked liquid is completed.

When the multistage centrifugal pump is used for a long time, the centrifugal pump body is internally vibrated at low frequency due to the influence of self reasons and high-pressure liquid flow rate, liquid drives the hard rubber cylinder 22 to vibrate at low frequency under the action of centrifugal force, so that the hard rubber cylinder 22 is elastically vibrated, the outer fixing block 26 and the outer sliding column 27 are driven to continuously extrude the buffer spring 28, the bump 29 is continuously extruded to the buffer spring 31, the buffer spring 28 and the buffer spring 31 jointly act, the fixed cylinder 6 counteracts part of vibration generated by the hard rubber cylinder 22, thereby effectively reducing vibration generated by liquid in the pump body and the hard rubber cylinder 22, preventing the centrifugal pump sealing mechanism from being damaged in a short time, indirectly prolonging the service life of the multistage centrifugal pump, and preventing the shaft 18 from being deflected after the multistage centrifugal pump works for a long time by the aid of the bearing 35, and the setting of the four connecting rods 33, so that the whole service life of the centrifugal pump is influenced, and the sealing groove 39 can be conveniently sealed by the sealing groove 39 of the hard rubber cylinder 22 through the sealing ring 36 and the first sealing ring 37 and the second sealing ring 38.

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 limiting relation between the rubber cover 39 and the hard rubber cylinder 22 can be easily released by pulling out the sealing bolt 44 upwards, so that the aim of quickly assembling and disassembling the sealing mechanism is fulfilled, and the sealing mechanism is time-saving, labor-saving and easy to operate.

When the multistage centrifugal pump is used, through the arrangement of the connecting hole 19, the horizontal limiting bolt 16, the tensioning spring 17 and the like, 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, so that the purpose of quickly assembling and disassembling the motor 10 is realized, and the multistage centrifugal pump is convenient to disassemble and clean in the later stage.

When the centrifugal pump is used, the position of the motor 10 is more fixed through the arrangement of the arc-shaped block 11 and the vertical limiting bolt 12, so that 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 application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Multistage centrifugal pump with fast-assembling sealing mechanism, including bottom plate (1), its characterized in that: the top fixedly connected with base (2) of bottom plate (1), the top fixedly connected with four pillar (3) of bottom plate (1), four the top fixedly connected with same roof (5) of pillar (3), the inlet opening has been seted up to the outer wall of base (2), inlet tube (4) has been cup jointed to the fixed in-hole, the top of base (2) with the bottom of roof (5) is all fixedly connected with same fixed cylinder (6), the top fixedly connected with four inclined strut boards (7) of roof (5), four the top of inclined strut board (7) is all fixedly connected with same solid fixed ring (8), the top of solid fixed ring (8) is equipped with and agrees with ring (9), the top fixedly connected with motor (10) of agreeing with ring (9), the outer wall fixedly connected with three arc piece (11) of motor (10), three the top of arc piece (11) and the top of agreeing with ring (9) all have evenly distributed three and have and agree with in-hole (48) and all have and have the same position to agree with three and block (48) and slide on the same position and all to agree with the bolt (48);

the output end of the motor (10) is fixedly connected with an input shaft (13) through an internal coupling, a fitting groove (14) is formed in the bottom end of the input shaft (13), a connecting block (15) is fixedly connected to the outer wall of the input shaft (13), horizontal limiting holes are formed in the outer wall of the connecting block (15) and the outer wall of the input shaft (13), the horizontal limiting holes in the input shaft (13) are communicated with the fitting groove (14), the two horizontal limiting holes are respectively and slidably sleeved with the same horizontal limiting bolt (16), two ends of the horizontal limiting bolts (16) respectively penetrate through the two horizontal limiting holes and respectively extend out of the two horizontal limiting holes, a tensioning spring (17) is slidably sleeved on the horizontal limiting bolts (16), two ends of the tensioning spring (17) are respectively and fixedly connected to one end of the horizontal limiting bolts (16) and the connecting block (15), a shaft (18) is arranged in the fitting groove (14), the outer wall of the shaft (18) is provided with a connecting hole (19), and the two positions of the connecting hole (19) are correspondingly sleeved with the two horizontal limiting bolts (19);

a plurality of uniformly distributed inner impellers (20) and outer impellers (21) are fixedly sleeved on the power shaft (18), a hard rubber cylinder (22) is fixedly connected to the top of the base (2), the inner impellers (20) and the outer impellers (21) are positioned in the hard rubber cylinder (22), a plurality of uniformly distributed inner fixing blocks (24) are fixedly connected to the outer wall of the hard rubber cylinder (22), inner sliding columns (25) are fixedly connected to one sides of the inner fixing blocks (24), a plurality of uniformly distributed outer fixing blocks (26) are fixedly connected to the inner wall of the fixing cylinder (6), the outer fixing blocks (26) respectively correspond to the inner fixing blocks (24), outer sliding columns (27) are fixedly connected to one sides of the outer fixing blocks (26), sliding grooves are formed in one ends of the inner sliding columns (25), one ends of the outer sliding columns (27) extend into the sliding grooves respectively, and a plurality of outer sliding blocks (28) are connected to the inner sliding columns (28) in a sleeved mode, and the outer sliding columns (28) are fixedly connected to the outer sliding columns (28) respectively;

four connecting rods (33) which are uniformly distributed are fixedly connected to the inner wall of the hard rubber cylinder (22), the other ends of the four connecting rods (33) are fixedly connected with the same fixing ring (34), bearings (35) are fixedly sleeved in the fixing rings (34), the bottom ends of the power shafts (18) penetrate through the bearings (35) and extend out of the bearings (35), the top sides of the four connecting rods (33) are fixedly connected with the same sealing ring (36), and a first sealing groove (37) is formed in the top side of the sealing ring (36);

a second sealing groove (38) is formed in the top side of the hard rubber cylinder (22), a rubber cover (39) is arranged at the top of the hard rubber cylinder (22), an inner convex ring (40) is fixedly connected to the inner wall of the bottom side of the rubber cover (39), and the inner convex ring (40) and the rubber cover (39) are respectively located in the first sealing groove (37) and the second sealing groove (38) and are respectively attached to the inner walls of the first sealing groove (37) and the second sealing groove (38);

the top side of the rubber cover (39) is provided with a through shaft hole (23), both ends of the power shaft (18) penetrate through the through shaft hole (23) and extend out of both sides of the through shaft hole (23) respectively, the outer wall of the rubber cover (39) is fixedly connected with two upper limiting rings (41), the outer wall of the hard rubber cylinder (22) is fixedly connected with two lower limiting rings (42), and the two upper limiting rings (41) correspond to the two lower limiting rings (42);

the two upper limiting rings (41) and the two lower limiting rings (42) are respectively provided with a fixing hole (43), the two fixing holes (43) at the same position are internally sleeved with sealing bolts (44), the outer walls of the sealing bolts (44) are respectively provided with rectangular holes (45), the two rectangular holes (45) are internally provided with two rectangular blocks (46), one end of each rectangular block (46) in each rectangular hole (45) is respectively extended to the outside of two sides of each rectangular hole (45), and one limiting spring (47) is fixedly connected between the two rectangular blocks (46) at the same side.

2. A multistage centrifugal pump with a quick-fit sealing mechanism according to claim 1, characterized in that: four lugs (29) are fixedly connected to the outer wall of the hard rubber cylinder (22), four T-shaped blocks (30) are fixedly connected to the top of the base (2), rectangular grooves are formed in the tops of the T-shaped blocks (30), damping springs (31) are fixedly connected to the inner wall of one side of each rectangular groove, and one ends of the lugs (29) are located in the four rectangular grooves and are in contact with one ends of the four damping springs (31) respectively.

3. A multistage centrifugal pump with a quick-fit sealing mechanism according to claim 1, characterized in that: the outer walls of the fixed cylinder (6) and the hard rubber cylinder (22) are provided with water outlets which are matched with each other, and the two water outlets are internally sheathed with the same water outlet pipe (32) in a sliding way.