CN213574633U

CN213574633U - Single-suction multistage centrifugal pump

Info

Publication number: CN213574633U
Application number: CN202021915585.7U
Authority: CN
Inventors: 易梅; 陈开东
Original assignee: Zigong Chuannan Pump Manufacturing Co ltd
Current assignee: Zigong Chuannan Pump Manufacturing Co ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-06-29
Anticipated expiration: 2030-09-04

Abstract

The utility model discloses a single-suction multistage centrifugal pump, the on-line screen storage device comprises a base, the base is provided with centrifugal pump body and motor along length direction, the output shaft of motor passes through the shaft coupling and the pump spindle connection of centrifugal pump body, two sliding trays have been seted up along the width direction symmetry to the base, all be provided with high adjustment mechanism in two sliding trays, high adjustment mechanism includes two-way screw lead screw and two trapezoidal sliders, two-way screw lead screw is arranged in the sliding tray and is connected with the base rotation, two-way screw lead screw extends along the length direction of base, two trapezoidal slider symmetries set up in the sliding tray and with two-way screw lead screw threaded connection, an inclined plane of two trapezoidal sliders sets up relatively and forms trapezoidal mounting groove. The driving device drives the bidirectional threaded screw rod to rotate, so that the moving directions of the two trapezoidal sliding blocks are opposite, the size of the trapezoidal mounting groove is changed, the mounting height of the centrifugal pump body is changed, and the pump shaft of the centrifugal pump and the output shaft of the motor are located on the same horizontal height.

Description

Single-suction multistage centrifugal pump

Technical Field

The utility model relates to a centrifugal pump technical field specifically is a single suction multistage centrifugal pump.

Background

The single-stage double-suction centrifugal pump is a single-stage double-suction horizontal split centrifugal pump, is suitable for the fields of factories, cities, mines, power stations, farmlands, hydraulic engineering and the like, and is used for conveying clear water without solid particles or other liquids with physical and chemical properties similar to water. The traditional single-suction multistage centrifugal pump fixing base is relatively fixed in structure, the positions of the centrifugal pump and the driving motor are not convenient to adjust, the motor shaft and the impeller shaft of the centrifugal pump are difficult to be positioned at the same horizontal height, the installation is difficult, and certain limitations are realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a single suction multistage centrifugal pump, the mounting height of centrifugal pump body is adjustable, is convenient for make the pump shaft of centrifugal pump and the output shaft of motor be located same level, the installation of being convenient for.

The purpose of the utility model is realized through the following technical scheme: a single-suction multistage centrifugal pump comprises a base, a centrifugal pump body and a motor, wherein the centrifugal pump body and the motor are arranged along the length direction of the base, a motor mounting seat is fixed on the base, the motor is fixed at the top of the motor mounting seat through bolts, an output shaft of the motor is connected with a pump shaft of the centrifugal pump body through a coupling, the base is symmetrically provided with two sliding grooves along the width direction, height adjusting mechanisms are arranged in the two sliding grooves, and the height adjusting mechanisms are used for adjusting the mounting height of the centrifugal pump body;

the height adjusting mechanism comprises a bidirectional threaded screw rod and two trapezoidal sliding blocks, the bidirectional threaded screw rod is arranged in the sliding groove and is rotationally connected with the base, the bidirectional threaded screw rod extends along the length direction of the base, one end of the bidirectional threaded screw rod is connected with a driving device, the two trapezoidal sliding blocks are symmetrically arranged in the sliding groove and are in threaded connection with the bidirectional threaded screw rod, the thread turning directions of the two trapezoidal sliding blocks are opposite, and one inclined planes of the two trapezoidal sliding blocks are oppositely arranged and form a trapezoidal mounting groove;

the bottom of centrifugal pump body is fixed with trapezoidal connecting block, the cross-section of trapezoidal connecting block is isosceles trapezoid, the big rectangle one end of trapezoidal connecting block with the bottom of centrifugal pump body is fixed, the little rectangle one end adaptation of trapezoidal connecting block is in the trapezoidal mounting groove, the inclined plane of trapezoidal connecting block with the inclined plane of trapezoidal mounting groove is parallel.

Furthermore, a plurality of groups of threaded holes are formed in the base along the width direction, connecting holes are correspondingly formed in the trapezoidal connecting blocks and the threaded holes, and the bolt assembly sequentially penetrates through one connecting hole and one threaded hole to fix the centrifugal pump body on the base.

Furthermore, the section of the trapezoidal sliding block is in a right trapezoid shape, and two sides of the trapezoidal sliding block are in contact with the side wall of the sliding groove.

Furthermore, the driving device is a driving motor, a mounting plate is fixed at one end, far away from the motor, of the base, the driving motor is arranged on the mounting plate, and an output shaft of the driving motor is connected with one end of the bidirectional threaded screw rod.

Further, be provided with inlet tube and delivery port on the centrifugal pump body, inlet tube flange joint has the filter tube, the detachable is provided with the screen frame in the filter tube.

Further, the screen frame is cavity formula awl post, the one end of screen frame minor diameter is fixed with the screen cloth, and the other end is rotatable to be provided with the shadoof, be fixed with annular boss in the inlet tube the external diameter of screen frame major diameter one end is greater than the internal diameter of annular boss, the screen frame is equipped with the one end of screen cloth is close to the inlet tube sets up.

Further, the bottom of base is provided with the supporting shoe.

The utility model has the advantages that:

1. the utility model provides a single suction multistage centrifugal pump, drive arrangement drive two-way screw lead screw rotates, makes the moving direction of two trapezoidal sliders opposite to change the size of trapezoidal mounting groove, and then change the mounting height of centrifugal pump body, make the pump shaft of centrifugal pump and the output shaft of motor be located same level, the installation of being convenient for.

2. Be connected with the filter tube on the inlet tube, filter the water that enters into this internal of centrifugal pump through the screen frame in the filter tube, avoid the impurity of aquatic sneak into this internal of centrifugal pump, prolonged the life of centrifugal pump.

Drawings

FIG. 1 is a schematic view of the overall structure of a single-suction multistage centrifugal pump of the present invention;

FIG. 2 is a schematic structural view of a base in the single-suction multistage centrifugal pump of the present invention;

FIG. 3 is a schematic structural view of a filter pipe in the single-suction multistage centrifugal pump of the present invention;

FIG. 4 is a schematic structural view of a screen body in the single-suction multistage centrifugal pump of the present invention;

FIG. 5 is a schematic diagram of the adaptation between the filter pipe and the screen body in the single suction multistage centrifugal pump of the present invention;

in the figure, 1-base, 2-centrifugal pump body, 3-motor, 4-motor mounting base, 5-bidirectional threaded screw rod, 6-trapezoidal slider, 7-sliding groove, 8-trapezoidal connecting block, 9-trapezoidal mounting groove, 10-threaded hole, 11-mounting plate, 12-driving motor, 13-water inlet pipe, 14-water outlet, 15-filter pipe, 16-sieve body, 17-sieve mesh, 18-lifting rod, 19-annular boss and 20-supporting block.

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.

As shown in fig. 1 to 5, a single-suction multistage centrifugal pump comprises a base 1, a centrifugal pump body 2 and a motor 3, wherein the centrifugal pump body 2 and the motor 3 are arranged along the length direction of the base 1, the motor mounting seat 4 is fixed on the base 1, the motor 3 is fixed on the top of the motor mounting seat 4 through a bolt, an output shaft of the motor 3 is connected with a pump shaft of the centrifugal pump body 2 through a coupler, the base 1 is symmetrically provided with two sliding grooves 7 along the width direction, and height adjusting mechanisms are arranged in the two sliding grooves 7 and used for adjusting the installation height of the centrifugal pump body 2;

when the centrifugal pump is installed in the prior art, due to the designed size machining error, the motor output shaft installed on the base 1 and the pump shaft of the centrifugal pump are not at the same horizontal height, so that installation cannot be completed, the gasket is usually added to adjust the height of the motor or the centrifugal pump, but the size of the gasket cannot completely meet the requirement, so that the height of the motor output shaft and the height of the pump shaft of the centrifugal pump still have certain difference, and the installation of the motor and the centrifugal pump is influenced.

Thereby high adjustment mechanism can adjust the height of centrifugal pump and make the pump shaft of centrifugal pump and the output shaft of motor be located same level to the installation of centrifugal pump and motor of being convenient for has improved the application scope of base 1.

As shown in fig. 1 and 2, the height adjusting mechanism comprises a bidirectional threaded screw rod 5 and two trapezoidal sliding blocks 6, the bidirectional threaded screw rod 5 is arranged in a sliding groove 7 and is rotatably connected with the base 1, the bidirectional threaded screw rod 5 extends along the length direction of the base 1, one end of the bidirectional threaded screw rod 5 is connected with a driving device, the two trapezoidal sliding blocks 6 are symmetrically arranged in the sliding groove 7 and are in threaded connection with the bidirectional threaded screw rod 5, the thread turning directions of the two trapezoidal sliding blocks 6 are opposite, and one inclined planes of the two trapezoidal sliding blocks 6 are opposite and form a trapezoidal mounting groove 9;

the bottom of centrifugal pump body 2 is fixed with trapezoidal connecting block 8, and the cross-section of trapezoidal connecting block 8 is isosceles trapezoid, and the big rectangle one end of trapezoidal connecting block 8 is fixed with the bottom of centrifugal pump body 2, and the little rectangle one end adaptation of trapezoidal connecting block 8 is parallel with the inclined plane of trapezoidal mounting groove 9 in trapezoidal mounting groove 9.

When the centrifugal pump body 2 needs to be lifted, the two trapezoidal sliding blocks 6 move close to each other, so that the size of the trapezoidal mounting groove 9 is reduced, the trapezoidal connecting block 8 is pushed to move upwards, and the purpose of lifting the centrifugal pump body 2 is achieved; when the height of the centrifugal pump body 2 needs to be reduced, the bidirectional threaded screw rod 5 is reversed, and the two trapezoidal sliding blocks 6 are far away from each other to move, so that the size of the trapezoidal mounting groove 9 is increased, the trapezoidal connecting block 8 moves downwards along the surface matched with the trapezoidal sliding blocks 6 under the condition of gravity, and the height of the centrifugal pump body 2 is reduced; the mounting height of the lifting centrifugal pump body 2 is adjusted through lifting of the lifting centrifugal pump body 2, so that the heights of a pump shaft of the centrifugal pump body 2 and an output shaft of the motor 3 are ensured to be positioned on the same horizontal height, and the mounting of the centrifugal pump body 2 and the motor 3 is facilitated; it is worth noting that the trapezoidal connecting block 8 is lifted between the top of the trapezoidal sliding block 6 and the top of the base 1 due to the limit of the base 1.

Further, a plurality of groups of threaded holes 10 are formed in the base 1 along the width direction, connecting holes are formed in the trapezoidal connecting blocks 8 corresponding to the threaded holes 10, and the bolt assemblies sequentially penetrate through the connecting holes and the threaded holes 10 to fix the centrifugal pump body 2 on the base 1.

One set of threaded holes 10 comprises a plurality of bolt holes arranged along the length direction of the base 1, the bolt assemblies are bolts and gaskets, the bolts penetrate through connecting holes and are in threaded connection with the bolt holes, the gaskets are arranged between the bolt heads and the trapezoidal connecting blocks 8, so that the centrifugal pump body 2 is fixed, the centrifugal pump body 2 is prevented from shaking or vibrating up and down in the trapezoidal mounting groove 9 due to vibration when the centrifugal pump body 2 operates, and the centrifugal pump body 1 and the motor 3 are damaged.

Further, the section of the trapezoidal sliding block 6 is a right trapezoid, and both sides of the trapezoidal sliding block 6 are in contact with the side walls of the sliding groove 7.

The rotation freedom degree of the trapezoidal sliding block 6 is limited through the sliding groove 7, so that the trapezoidal sliding block 6 can only move along the length direction of the bidirectional threaded screw rod 5.

Further, the driving device is a driving motor 12, an installation plate 11 is fixed at one end of the base 1 far away from the motor 3, the driving motor 12 is arranged on the installation plate 11, and an output shaft of the driving motor 12 is connected with one end of the bidirectional threaded screw rod 5.

The driving device adopts a driving motor 12, and the driving motor 12 drives the bidirectional threaded screw rod 5 to rotate, so that the size of the trapezoidal mounting groove 9 is changed.

Further, as shown in fig. 3 to 5, a water inlet pipe 13 and a water outlet 14 are arranged on the centrifugal pump body 2, the water inlet pipe 13 is connected with a filter pipe 15 in a flange mode, and a sieve body 16 is detachably arranged in the filter pipe 15.

Further, the screen frame 16 is a hollow conical column, a screen 17 is fixed at one end of the screen frame 16 with a small diameter, a lifting rod 18 is rotatably arranged at the other end of the screen frame 16, an annular boss 19 is fixed in the water inlet pipe 13, the outer diameter of one end of the screen frame 16 with a large diameter is larger than the inner diameter of the annular boss 19, and the end of the screen frame 16 provided with the screen 17 is arranged close to the water inlet pipe 13.

Further, the bottom of the base 1 is provided with a supporting block 20.

The water entering the centrifugal pump body 2 is firstly filtered through the screen 17, particle impurities mixed in the water are filtered, the impurities in the water are prevented from being mixed in the centrifugal pump body, the service life of the centrifugal pump is prolonged, and meanwhile, the filter pipe 15 and the screen 16 are detachably connected, so that the screen 17 is convenient to clean and discharge the impurities in the filter pipe 15, in the specific implementation, the filter pipe 15 is detached from the water inlet pipe 13, and then the screen 16 is pulled out from the filter pipe 15 by pulling the lifting rod 18; the setting of annular boss 19 is spacing to screen frame 16, avoids screen frame 16 to enter into centrifugal pump body 2 along with rivers in to cause the damage of centrifugal pump body 2.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The single-suction multistage centrifugal pump is characterized by comprising a base (1), a centrifugal pump body (2) and a motor (3), wherein the centrifugal pump body (2) and the motor (3) are arranged along the length direction of the base (1), a motor mounting seat (4) is fixed on the base (1), the motor (3) is fixed at the top of the motor mounting seat (4) through bolts, an output shaft of the motor (3) is connected with a pump shaft of the centrifugal pump body (2) through a coupler, the base (1) is symmetrically provided with two sliding grooves (7) along the width direction, height adjusting mechanisms are arranged in the two sliding grooves (7), and the height adjusting mechanisms are used for adjusting the mounting height of the centrifugal pump body (2);

the height adjusting mechanism comprises a bidirectional threaded screw rod (5) and two trapezoidal sliding blocks (6), the bidirectional threaded screw rod (5) is arranged in the sliding groove (7) and is rotatably connected with the base (1), the bidirectional threaded screw rod (5) extends along the length direction of the base (1), one end of the bidirectional threaded screw rod (5) is connected with a driving device, the two trapezoidal sliding blocks (6) are symmetrically arranged in the sliding groove (7) and are in threaded connection with the bidirectional threaded screw rod (5), the thread turning directions of the two trapezoidal sliding blocks (6) are opposite, and one inclined planes of the two trapezoidal sliding blocks (6) are oppositely arranged to form a trapezoidal mounting groove (9);

the bottom of centrifugal pump body (2) is fixed with trapezoidal connecting block (8), the cross-section of trapezoidal connecting block (8) is isosceles trapezoid, the big rectangle one end of trapezoidal connecting block (8) with the bottom of centrifugal pump body (2) is fixed, the little rectangle one end adaptation of trapezoidal connecting block (8) is in trapezoidal mounting groove (9), the inclined plane of trapezoidal connecting block (8) with the inclined plane of trapezoidal mounting groove (9) is parallel.

2. The single-suction multistage centrifugal pump as claimed in claim 1, wherein the base (1) is provided with a plurality of groups of threaded holes (10) along the width direction, the trapezoidal connecting block (8) is provided with connecting holes corresponding to the threaded holes (10), and a bolt assembly sequentially passes through a connecting hole and one of the threaded holes (10) to fix the centrifugal pump body (2) on the base (1).

3. A single suction multistage centrifugal pump according to claim 2, wherein the trapezoidal slider (6) has a right trapezoid cross section, and both sides of the trapezoidal slider (6) are in contact with the side walls of the sliding groove (7).

4. The single-suction multistage centrifugal pump according to claim 1, wherein the driving device is a driving motor (12), a mounting plate (11) is fixed to one end of the base (1) far away from the motor (3), the driving motor (12) is arranged on the mounting plate (11), and an output shaft of the driving motor (12) is connected with one end of the bidirectional threaded screw rod (5).

5. The single-suction multistage centrifugal pump as claimed in claim 1, wherein a water inlet pipe (13) and a water outlet (14) are arranged on the centrifugal pump body (2), the water inlet pipe (13) is connected with a filter pipe (15) in a flange mode, and a screen body (16) is detachably arranged in the filter pipe (15).

6. The single suction multistage centrifugal pump according to claim 5, wherein the screen body (16) is a hollow conical column, one end of the screen body (16) with a small diameter is fixed with a screen (17), the other end of the screen body is rotatably provided with a lifting rod (18), the water inlet pipe (13) is internally fixed with an annular boss (19), the outer diameter of one end of the screen body (16) with a large diameter is larger than the inner diameter of the annular boss (19), and one end of the screen body (16) provided with the screen (17) is arranged close to the water inlet pipe (13).

7. A single-suction multistage centrifugal pump according to claim 5, characterized in that the bottom of the base (1) is provided with support blocks (20).