CN220415722U - Cavitation-preventing low-addition-level middle-open multistage centrifugal pump - Google Patents

Abstract

The utility model discloses an anti-cavitation low-level-adding middle-open type multistage centrifugal pump, which comprises a motor and a transmission shaft arranged at the right end of the motor, wherein the lower end of the motor is provided with a bracket, the lower end of the bracket is provided with a fixed table A, the bracket is connected with the fixed table A through a connecting block, the motor is electrically connected with an external control module through an electric wire, the lower end of the fixed table A is provided with a fixed table B, a plurality of limiting grooves are arranged on the fixed table B in a penetrating manner, a limiting rod is arranged at the position, corresponding to the limiting grooves, of the lower end of the fixed table A, the lower end of the limiting rod is provided with a limiting block, the limiting rod is arranged in the limiting grooves in a penetrating manner, the limiting rod can slide up and down in the limiting grooves, vibration generated by the machine can be transmitted to the fixed table A in the running process of the centrifugal pump, and the fixed table A can be extruded to unload force when the machine runs in a bouncing manner.

Description

Cavitation-preventing low-addition-level middle-open multistage centrifugal pump

Technical Field

The utility model belongs to the technical field related to centrifugal pumps, and particularly relates to an anti-cavitation low-addition-level middle-open type multistage centrifugal pump.

Background

The multistage centrifugal pump is that two or more centrifugal pumps with the same functions are assembled together, the fluid channel structure is characterized in that a medium pressure relief opening of a first stage is communicated with an inlet of a second stage, the medium pressure relief opening of the second stage is communicated with an inlet of a third stage, the multistage centrifugal pump is formed by the mechanism connected in series, the multistage centrifugal pump adopts an efficient and energy-saving hydraulic model recommended by China, and has the advantages of high efficiency, energy saving, wide performance range, safe and stable operation, low noise, long service life, convenient installation and maintenance and the like.

Disclosure of Invention

The utility model aims to provide an anti-cavitation low-level middle-open type multistage centrifugal pump, which aims to solve the problems that in the prior art, a fixed table is required to be fixed in the using process of the multistage centrifugal pump, the existing fixed table is of a solid integral structure, vibration generated when the centrifugal pump runs is stable in structure and is required to resist against the rigidity of the material of a self or a bracket, the vibration generated when a machine runs cannot be buffered and unloaded, the machine can be greatly worn for a long time to reduce the service life of the machine, the subsequent maintenance and replacement cost is increased, the operation of the multistage centrifugal pump needs to be arranged on a horizontal plane to safely and stably run, each fixed column cannot be accurately leveled when the existing fixed table is installed, and the rotor and a shell in the existing fixed table can be rubbed by dynamic balance generated by rotation of an internal device when the existing fixed table is not enough in horizontal operation, so that the efficiency and the service life are reduced.

In order to achieve the above purpose, the present utility model provides the following technical solutions: an anti-cavitation low-level middle-open type multistage centrifugal pump comprises a motor and a transmission shaft arranged at the right end of the motor;

the lower end of the motor is provided with a bracket, the lower end of the bracket is provided with a fixed table A, the bracket is connected with the fixed table A through a connecting block, and the motor is electrically connected with an external control module through an electric wire;

three connecting rings penetrate through the right end of the transmission shaft, a centrifugal device is arranged between every two connecting rings, a water inlet pipe is arranged at the upper end of each connecting ring on the left side, a water outlet pipe is arranged at the upper end of each connecting ring on the middle, and the middle is communicated with the lower ends of the connecting rings on the right side through connecting pipes;

the lower ends of the connecting rings at the left side and the right side are provided with connecting plates, the lower ends of the connecting plates are provided with fixing tables A, and the connecting plates are connected with the fixing tables A through rivets;

the lower end of the fixed table A is provided with a fixed table B, a plurality of limiting grooves are formed in the fixed table B in a penetrating manner, limiting rods are arranged at positions, corresponding to the limiting grooves, of the lower end of the fixed table A, and limiting blocks are arranged at the lower ends of the limiting rods;

the limiting rod is arranged in the limiting groove in a penetrating mode, and can slide up and down in the limiting groove.

Preferably, the left end and the right end of each limit groove at the upper end of the fixed table B are provided with cushion pads, the cushion pads can be attached to the fixed table A, and the cushion pads are connected with the fixed table B and are not connected with the fixed table A.

Preferably, a rotating shaft is arranged in the fixed table B at the left end and the right end of the limiting groove, and a bearing is arranged on the rotating shaft.

Preferably, the bearing can rotate on the rotating shaft, and one end of the bearing is attached to the limiting rod.

Preferably, a plurality of support columns are arranged at the lower end of the fixed table B, and threads are arranged on the support columns.

Preferably, the lower end of the support column is sleeved with a sleeve block, and the sleeve block can enable the support column to stretch and retract in the sleeve block through rotation.

Preferably, the sleeve box at the lower end of the sleeve block is provided with a base, the sleeve block can rotate in the base, and the base is fixedly connected with the ground through bolts.

Preferably, the left side the position department of go-between left end is provided with stable cover, the transmission shaft runs through and sets up in stable cover, and each both ends are close to upside position department around the go-between are provided with fixed cover, with one side connect through running through setting up the dead lever in the fixed cover.

Compared with the prior art, the utility model provides the cavitation-preventing low-addition-level middle-open multistage centrifugal pump, which has the following beneficial effects:

this novel through fixed station A, fixed station B, the blotter, the gag lever post, the limit groove, the support column, the cover piece, the stopper, the pivot, the bearing, the base, the bolt, at the in-process of centrifugal pump operation, the vibrations that the machine produced can transmit to fixed station A on, fixed station A can extrude the blotter when bouncing whereabouts, just so can unload the power to the vibrations that produce when the machine operation, with the wearing and tearing that produce when reducing the part vibrations, increase life, reduce follow-up cost of maintenance, in order to avoid the position to produce the skew at fixed station A when bouncing, set up gag lever post and limit groove and make fixed station A can only be in fixed station B upper and lower bouncing and can not produce the skew, the stopper of gag lever post lower extreme can prevent to break away from the limit groove because of the too big limit lever post that leads to of vibrations range, the pivot and bearing set up can let the gag lever post produce friction when bouncing in the limit groove, in order to reduce wearing and tearing, improve life, when needs place the machine in comparatively uneven place, with the base through the bolt on, increase life, reduce the wear and tear, the maintenance, reduce the position in the cover piece adjustment is in the level of the fixed station B can be stable for the machine, the level is stable and stable to the machine is accomplished, the level to the machine is stable to the operation can be accomplished.

Drawings

Fig. 1 is a schematic perspective view of the whole structure of the present utility model.

Fig. 2 is a schematic diagram of the overall front plan structure of the present utility model.

Fig. 3 is a schematic plan view of the limiting rod and the limiting groove of the present utility model.

Fig. 4 is a schematic plan view of the base of the present utility model.

In the figure: 1. a motor; 2. a transmission shaft; 3. a stabilizing sleeve; 4. a connecting ring; 5. a water inlet pipe; 6. a centrifugal device; 7. a water outlet pipe; 8. a bracket; 9. a connecting block; 10. a fixed rod; 11. a fixed sleeve; 12. a connecting plate; 13. a rivet; 14. a connecting pipe; 15. a fixed station A; 16. a fixed table B; 17. a cushion pad; 18. a limit rod; 19. a limit groove; 20. a support column; 21. sleeving blocks; 22. a limiting block; 23. a rotating shaft; 24. a bearing; 25. a base; 26. and (5) a bolt.

Detailed Description

The following description of the embodiments of the present utility model 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 utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a cavitation-preventing low-level middle-open type multistage centrifugal pump as shown in figures 1-4, which comprises a motor 1 and a transmission shaft 2 arranged at the right end of the motor 1;

the lower end of the motor 1 is provided with a bracket 8, the lower end of the bracket 8 is provided with a fixed table A15, the bracket 8 is connected with the fixed table A15 through a connecting block 9, and the motor 1 is electrically connected with an external control module through an electric wire; the right end of the transmission shaft 2 is provided with three connecting rings 4 in a penetrating way, a centrifugal device 6 is arranged between every two connecting rings 4, the upper end of the left connecting ring 4 is provided with a water inlet pipe 5, the upper end of the middle connecting ring 4 is provided with a water outlet pipe 7, and the middle and the lower end of the right connecting ring 4 are communicated through a connecting pipe 14; the lower ends of the connecting rings 4 at the left side and the right side are provided with connecting plates 12, the lower ends of the connecting plates 12 are provided with fixed tables A15, and the connecting plates 12 are connected with the fixed tables A15 through rivets 13; the lower end of the fixed table A15 is provided with a fixed table B16, a plurality of limit grooves 19 are formed in the fixed table B16 in a penetrating manner, limit rods 18 are arranged at positions, corresponding to the limit grooves 19, of the lower end of the fixed table A15, and limit blocks 22 are arranged at the lower ends of the limit rods 18;

wherein, the gag lever post 18 runs through and sets up in spacing groove 19, and gag lever post 18 can slide from top to bottom in spacing groove 19, and left side go-between 4 left end position department is provided with stable cover 3, and transmission shaft 2 runs through and sets up in stable cover 3, and both ends are close to upside position department around each go-between 4 are provided with fixed cover 11, connect through running through setting up dead lever 10 in the same side fixed cover 11.

In this embodiment, when the multistage centrifugal pump is required to be used, the motor 1 and the multistage centrifugal pump are connected by the transmission shaft 2, then the motor 1 and the multistage centrifugal pump are fixed on a horizontal and firm plane, the water inlet pipe 5 and the water outlet pipe 7 are connected with a water pipe, water is injected into the water pipe, the motor 1 is powered on, the multistage centrifugal pump is firstly operated at a low speed to be filled with water so as to facilitate the subsequent operation, and whether the operation is stable or not and whether water leakage exists or not are checked at this time, if the motor 1 is stopped immediately and the power supply is cut off for adjustment and maintenance, and if the multistage centrifugal pump is full of water, the multistage centrifugal pump can be normally used.

As shown in fig. 2-4, a fixed table B16 is arranged at the lower end of the fixed table a15, a plurality of limit grooves 19 are arranged on the fixed table B16 in a penetrating manner, a limit rod 18 is arranged at the position, corresponding to the limit grooves 19, of the lower end of the fixed table a15, and a limit block 22 is arranged at the lower end of the limit rod 18;

the limiting rods 18 penetrate through the limiting grooves 19, the limiting rods 18 can slide up and down in the limiting grooves 19, cushion pads 17 are arranged at the left end and the right end of each limiting groove 19 at the upper end of the fixed table B16, the cushion pads 17 can be attached to the fixed table A15, the cushion pads 17 are connected with the fixed table B16 and are not connected with the fixed table A15, rotating shafts 23 are arranged in the fixed table B16 at the left end and the right end of the limiting grooves 19, bearings 24 are arranged on the rotating shafts 23, one ends of the bearings 24 are attached to the limiting rods 18, a plurality of support columns 20 are arranged at the lower ends of the fixed table B16, threads are arranged on the support columns 20, sleeve blocks 21 are sleeved at the lower ends of the support columns 20, the sleeve blocks 21 can enable the support columns 20 to stretch out and draw back in the same through rotation, bases 25 are sleeved at the lower ends of the sleeve blocks 21, the bases 25 can rotate in the bases 25, and the bases 25 are fixedly connected with the ground through bolts 26.

Preferably, in the running process of the centrifugal pump, vibration generated by the machine is transmitted to the fixed table A15, and the fixed table A15 can squeeze the buffer cushion 17 to unload force when bouncing and falling, so that the force can be unloaded to the vibration generated when the machine runs, abrasion generated when parts vibrate is reduced, the service life is prolonged, and the subsequent maintenance cost is reduced.

Preferably, in order to avoid the offset of the position when the fixed table a15 is sprung, the limiting rod 18 and the limiting groove 19 are provided, so that the fixed table a15 can only sprung up and down on the fixed table B16 without the offset, the limiting block 22 at the lower end of the limiting rod 18 can prevent the limiting rod 18 from being separated from the limiting groove 19 due to overlarge vibration amplitude, and friction is not generated or is generated as little as possible when the rotating shaft 23 and the bearing 24 are arranged to enable the limiting rod 18 to slide up and down in the limiting groove 19, so that abrasion is reduced, and the service life is prolonged.

Preferably, when the machine needs to be placed in a place which is relatively non-horizontal, the base 25 is fixed on the ground through the bolts 26, the sleeve block 21 is rotated to adjust the position of the support column 20 in the sleeve block 21, so that the fixed table B16 tends to be horizontal, and the horizontal placement of the machine can be completed, so that the machine can run more stably and efficiently, and the problem of high abrasion caused by unstable dynamic balance is solved.

Optionally, when the machine needs to be transferred to the installation position, the power supply of the motor 1 is disconnected first and connected with the water pipes on the water inlet pipe 5 and the water outlet pipe 7, then the bolts 26 are taken down from the base 25, the base 25 is separated from the ground, then the machine is lifted by the crane and transferred to the new installation position, after the machine is put down, the base 25 is connected with the ground by the bolts 26, the position of the support column 20 in the sleeve block 21 is adjusted by the rotary sleeve block 21, the fixed table B16 is kept horizontal, the water pipes are connected for the water inlet pipe 5 and the water outlet pipe 7, then the power supply is connected for the motor 1, and normal use can be performed after running stability and water leakage inspection.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims (8)

1. An anti-cavitation low-level middle-open type multistage centrifugal pump comprises a motor (1) and a transmission shaft (2) arranged at the right end of the motor (1);

the motor is characterized in that a support (8) is arranged at the lower end of the motor (1), a fixed table A (15) is arranged at the lower end of the support (8), the support (8) is connected with the fixed table A (15) through a connecting block (9), and the motor (1) is electrically connected with an external control module through an electric wire;

three connecting rings (4) are arranged at the right end of the transmission shaft (2) in a penetrating manner, a centrifugal device (6) is arranged between every two connecting rings (4), a water inlet pipe (5) is arranged at the upper end of each connecting ring (4) at the left side, a water outlet pipe (7) is arranged at the upper end of each connecting ring (4) at the middle, and the lower ends of the connecting rings (4) at the middle and the right side are communicated through a connecting pipe (14);

the lower ends of the connecting rings (4) at the left side and the right side are provided with connecting plates (12), the lower ends of the connecting plates (12) are provided with fixing tables A (15), and the connecting plates (12) are connected with the fixing tables A (15) through rivets (13);

the method is characterized in that: the lower end of the fixed table A (15) is provided with a fixed table B (16), a plurality of limit grooves (19) are formed in the fixed table B (16) in a penetrating mode, a limit rod (18) is arranged at the position, corresponding to the limit grooves (19), of the lower end of the fixed table A (15), and a limit block (22) is arranged at the lower end of the limit rod (18);

the limiting rod (18) is arranged in the limiting groove (19) in a penetrating mode, and the limiting rod (18) can slide up and down in the limiting groove (19).

2. An anti-cavitation low-addition-level mid-open multistage centrifugal pump according to claim 1, wherein: the buffer cushion (17) is arranged at the left end and the right end of each limit groove (19) at the upper end of the fixed table B (16), the buffer cushion (17) can be attached to the fixed table A (15), and the buffer cushion (17) is connected with the fixed table B (16) and is not connected with the fixed table A (15).

3. An anti-cavitation low-addition-level mid-open multistage centrifugal pump according to claim 2, characterized in that: the fixed table B (16) at the left end and the right end of the limiting groove (19) is provided with a rotating shaft (23), and the rotating shaft (23) is provided with a bearing (24).

4. A cavitation resistant low add level split multi-stage centrifugal pump according to claim 3, wherein: the bearing (24) can rotate on the rotating shaft (23), and one end of the bearing (24) is attached to the limiting rod (18).

5. An anti-cavitation low-addition-level mid-open multistage centrifugal pump according to claim 4, wherein: the lower end of the fixed table B (16) is provided with a plurality of support columns (20), and threads are arranged on the support columns (20).

6. An anti-cavitation low-add level split multi-stage centrifugal pump according to claim 5, wherein: the lower end of the support column (20) is sleeved with a sleeve block (21), and the sleeve block (21) can enable the support column (20) to stretch and retract in the sleeve block through rotation.

7. An anti-cavitation low-add level split multi-stage centrifugal pump according to claim 6, wherein: the lower end sleeve box of the sleeve block (21) is provided with a base (25), the sleeve block (21) can rotate in the base (25), and the base (25) is fixedly connected with the ground through bolts (26).

8. An anti-cavitation low-addition-level mid-open multistage centrifugal pump according to claim 1, wherein: the left side go-between (4) left end position department is provided with stable cover (3), transmission shaft (2) run through and set up in stable cover (3), every both ends are close to upside position department around go-between (4) are provided with fixed cover (11), with one side connect through running through setting up dead lever (10) in fixed cover (11).