CN213628016U

CN213628016U - Long-shaft deep-well fire pump unit

Info

Publication number: CN213628016U
Application number: CN202022652677.7U
Authority: CN
Inventors: 潘光吉; 王建洪
Original assignee: Shanghai Danbo Pump Group Co ltd
Current assignee: Shanghai Danbo Pump Group Co ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-07-06
Anticipated expiration: 2030-11-16

Abstract

The utility model discloses a long-shaft deep well fire pump set, which relates to the technical field of submersible pumps and comprises a motor, a pump seat, a water lifting pipe and a pump body working part, wherein the output shaft of the motor is connected with a pump shaft, and the pump shaft sequentially penetrates through the pump seat, the water lifting pipe and the pump body working part from top to bottom; the pump body working part comprises a guide shell which is connected in series in a multistage way, an impeller is arranged in the guide shell, and the impeller is fixed on a pump shaft; the lower end of the working component is provided with a water inlet shell connected with the diversion shell, and the water inlet shell is rotationally connected with the lower end of the pump shaft; a mechanical sealing assembly is arranged between the matching surfaces of the pump shaft and the pump seat. The mechanical sealing assembly is arranged between the matching surfaces of the pump shaft and the pump seat, so that the leakage of the long-shaft deep well pump shaft in the running process can be effectively prevented, and the sealing state is stable and reliable in the long-period running process. Utilize the utility model discloses can reduce the wearing and tearing of pump shaft, greatly reduced friction consumption, extension equipment life.

Description

Long-shaft deep-well fire pump unit

Technical Field

The utility model relates to a immersible pump technical field especially relates to a major axis deep well fire pump package.

Background

The long shaft deep well pump is a vertical single-suction multistage centrifugal pump, the impeller of which is arranged below the dynamic water level in the well, the power device is arranged on the well, the impeller is driven to rotate in the diversion shell by the transmission long shaft, and the water flow is lifted upwards to the ground along the flow passage between the diversion shell and the impeller through the water pipe and finally is output from the outlet of the pump seat.

At present, the existing long-shaft deep-well fire pump set usually adopts a packing sealing mode, and has the defects of large sealing leakage amount, environmental pollution caused by water leakage, large friction power loss, easy abrasion of a pump shaft in operation, short service life and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a major axis deep well fire pump package aims at solving among the prior art pump shaft and adopts the packing sealed existence to let out technical problem such as the leakage volume is big, the friction consumption is big, the pump shaft is worn and torn easily, life is short.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is:

a long-shaft deep well fire pump set comprises a motor, a pump seat, a water lifting pipe and a pump body working part, wherein an output shaft of the motor is connected with a pump shaft, and the pump shaft sequentially penetrates through the pump seat, the water lifting pipe and the pump body working part from top to bottom; the pump body working part comprises a guide shell which is connected in series in a multistage way, an impeller is arranged in the guide shell, and the impeller is fixed on a pump shaft; the lower end of the working component is provided with a water inlet shell connected with the diversion shell, and the water inlet shell is rotationally connected with the lower end of the pump shaft; and a mechanical sealing assembly is arranged between the matching surfaces of the pump shaft and the pump seat.

Preferably, the top of the pump seat is provided with a mechanical sealing cover, a positioning ring fixed on the pump shaft is arranged below the mechanical sealing cover, through holes matched with the pump shaft are formed in the middle parts of the mechanical sealing cover and the positioning ring, and the mechanical sealing assembly is arranged between the mechanical sealing cover and the positioning ring.

Preferably, the mechanical seal assembly comprises a static ring and a dynamic ring, the static ring is embedded in the lower surface of the mechanical seal cover, the dynamic ring is arranged on the upper surface of the positioning ring, a shaft sleeve is arranged between the static ring and the dynamic ring, and a spring is sleeved on the dynamic ring and used for pushing the shaft sleeve to tightly press the static ring on the mechanical seal cover.

Preferably, the lower surface of the machine sealing cover is provided with a groove matched with the static ring, and the lower surface of the static ring and the upper surface of the dynamic ring are both provided with grooves matched with the shaft sleeve; the shaft sleeve is a T-shaped sleeve, a boss at the top of the shaft sleeve is embedded in a groove of the static ring, and the lower part of the shaft sleeve is embedded in a groove at the upper end of the dynamic ring; the upper end and the lower end of the movable ring are both provided with convex eaves, and the spring is sleeved outside the movable ring and arranged between the convex eaves at the two ends.

Preferably, the locating ring is fixed on the pump shaft through a pin.

Preferably, the motor is connected with the pump base through a motor support, an output shaft of the motor is connected with the pump base through a coupler, and the coupler is arranged inside the motor support.

Preferably, the outer wall of the water lifting pipe is provided with a support frame for fixing the water lifting pipe, and a support bearing is arranged between the support frame and the water lifting pipe.

Preferably, the impeller is connected with the pump base through a taper sleeve, and the outer diameter of the taper sleeve is large in the upper portion and small in the lower portion.

Preferably, the upper part of the inner cavity of the water inlet shell is provided with a filter screen plate, and the filter screen plate is connected with the lower end of the pump shaft through a lower shell bearing in a rotating manner.

Preferably, a pressure gauge is arranged at a water outlet of the pump seat.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the mechanical sealing component is arranged between the matching surfaces of the pump shaft and the pump seat, so that the leakage of the long-axis deep well pump shaft in the operation can be effectively prevented, and the sealing state is stable and reliable in the long-period operation; in addition, the lower end of the working component is rotatably connected with the lower ends of the water inlet shell and the pump shaft, so that the pump shaft is reliably mounted. Utilize the utility model discloses can reduce the wearing and tearing of pump shaft, greatly reduced friction consumption, extension equipment life.

Drawings

Fig. 1 is a schematic structural view of a long-shaft deep-well fire pump unit provided by an embodiment of the present invention;

FIG. 2 is a schematic illustration of the mechanical seal assembly between the cover and retaining ring of FIG. 1;

FIG. 3 is a schematic view of the inner structure of the guide shell of FIG. 1;

in the figure: 1-a motor; 2-a pump base; 3-a water raising pipe; 4-a pump shaft; 5-a guide shell; 6-impeller; 7-a water inlet shell; 8-mechanically sealing the cover; 9-a positioning ring; 10-a stationary ring; 11-a rotating ring; 12-a shaft sleeve; 13-a spring; 14-a pin; 15-a motor support; 16-a coupling; 17-a support frame; 18-taper sleeve; 19-a filter screen plate; 20-a lower shell bearing; 21-a bracket bearing; 22-pressure gauge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions in the embodiments of the present invention are described below clearly and completely with reference to the accompanying drawings and specific embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, the utility model provides a long-axis deep well fire pump set, including motor 1, pump base 2, lift pipe 3 and pump body working part, the output shaft of motor 1 is connected with pump shaft 4, pump shaft 4 runs through pump base 2, lift pipe 3 and pump body working part from top to bottom in proper order; the pump body working part comprises a guide shell 5 which is connected in series in a multi-stage manner, an impeller 6 is arranged in the guide shell 5, and the impeller 6 is fixed on the pump shaft 4; the lower end of the working component is provided with a water inlet shell 7 connected with the diversion shell 5, and the water inlet shell 7 is rotatably connected with the lower end of the pump shaft 4; and a mechanical sealing assembly is arranged between the matching surfaces of the pump shaft 4 and the pump seat 2.

As shown in fig. 1 and 2, a mechanical seal cover 8 is arranged at the top of the pump base 2, a positioning ring 9 fixed on the pump shaft 4 is arranged below the mechanical seal cover 8, through holes matched with the pump shaft 4 are formed in the middle of the mechanical seal cover 8 and the middle of the positioning ring 9, and the mechanical seal assembly is arranged between the mechanical seal cover 8 and the positioning ring 9. The mechanical seal assembly comprises a static ring 10 and a dynamic ring 11, the static ring 10 is embedded in the lower surface of the machine seal cover 8, the dynamic ring 11 is arranged on the upper surface of the positioning ring 9, a shaft sleeve 12 is arranged between the static ring 10 and the dynamic ring 11, and a spring 13 is sleeved on the dynamic ring 11 and used for pushing the shaft sleeve 12 to press the static ring 10 on the machine seal cover 8.

Compared with the prior art, the utility model has the advantages of simple structure, reasonable in design, sealing performance are reliable, with the help of the cooperation of quiet ring and rotating ring, can effectively avoid the pump shaft to take place to leak at the operation in-process, can ensure that pump shaft sealing state is stable. According to actual application, the leakage amount is small, according to rough statistics, the leakage amount is only 1/100 of the packing seal, the friction power consumption is small, the friction power of the mechanical seal is only 10% -50% of that of the packing seal, the maintenance period is long, and the service life of the pump set is effectively prolonged.

Further optimizing the technical scheme, as shown in fig. 2, the lower surface of the machine seal cover 8 is provided with a groove matched with the stationary ring 10, and the lower surface of the stationary ring 10 and the upper surface of the movable ring 11 are both provided with grooves matched with the shaft sleeve 12; the shaft sleeve 12 is a T-shaped sleeve, a boss at the top of the shaft sleeve 12 is embedded in a groove of the static ring 10, and the lower part of the shaft sleeve 12 is embedded in a groove at the upper end of the dynamic ring 11; the upper end and the lower end of the movable ring 11 are both provided with convex eaves, and the spring 13 is sleeved outside the movable ring 11 and arranged between the convex eaves at the two ends. The shaft sleeve can be tightly pressed in the groove of the static ring by utilizing the spring on the dynamic ring, the pump shaft and the shaft sleeve are basically not abraded, and meanwhile, the automatic compensation can be realized after the end surfaces of the dynamic ring, the static ring or the shaft sleeve are abraded by utilizing the spring. Typically, frequent maintenance is not necessary.

In particular, as shown in fig. 1, the positioning ring 9 can be fixed to the pump shaft 4 by a pin 14. The pin is installed by a match drill. In addition, motor 1 passes through motor support 15 and links to each other with pump seat 2, motor 1's output shaft passes through shaft coupling 16 and links to each other with pump seat 2, shaft coupling 16 sets up in motor support 15's inside.

In order to fix and stabilize the water lifting pipe, as shown in fig. 1, a support frame 17 for fixing the water lifting pipe 3 is arranged on the outer wall of the water lifting pipe 3, a support bearing is arranged between the support frame 17 and the water lifting pipe 3, and the water lifting pipe can be flexibly fixed while the installation stability of the water lifting pipe can be ensured by means of the support bearing.

As shown in fig. 1 and 3, the impeller 6 is connected with the pump base 2 through a taper sleeve 18, and the outer diameter of the taper sleeve 18 is large in top and small in bottom. The impeller and the pump shaft can be firmly installed by means of the taper sleeve, and looseness in the operation process is avoided.

Further optimizing the technical scheme, as shown in fig. 1, a filter screen plate 19 is arranged at the upper part of the inner cavity of the water inlet shell 7, and the filter screen plate 19 is rotatably connected with the lower end of the pump shaft 4 through a lower shell bearing 20. Adopt and filter the bounding wall and can intake to play the filtering action to the pump package, guarantee the pump shaft simultaneously with the help of the lower shell bearing and rotate in a flexible way.

In addition, a pressure gauge is arranged at a water outlet of the pump base, and the pressure gauge is used for monitoring the water outlet pressure of the pump set in real time.

The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A long-shaft deep well fire pump set comprises a motor, a pump seat, a water lifting pipe and a pump body working part, wherein an output shaft of the motor is connected with a pump shaft, and the pump shaft sequentially penetrates through the pump seat, the water lifting pipe and the pump body working part from top to bottom; the pump body working part comprises a guide shell which is connected in series in a multistage way, an impeller is arranged in the guide shell, and the impeller is fixed on a pump shaft; the method is characterized in that: the lower end of the working component is provided with a water inlet shell connected with the diversion shell, and the water inlet shell is rotationally connected with the lower end of the pump shaft; and a mechanical sealing assembly is arranged between the matching surfaces of the pump shaft and the pump seat.

2. The long shaft deep well fire pump unit of claim 1, wherein: the pump is characterized in that a sealing cover is arranged at the top of the pump seat, a positioning ring fixed on the pump shaft is arranged below the sealing cover, through holes matched with the pump shaft are formed in the middle of the sealing cover and the positioning ring, and the mechanical sealing assembly is arranged between the sealing cover and the positioning ring.

3. The long shaft deep well fire pump unit of claim 2, wherein: the mechanical seal assembly comprises a static ring and a moving ring, the static ring is embedded in the lower surface of the machine seal cover, the moving ring is arranged on the upper surface of the positioning ring, a rubber sleeve is arranged between pump shafts of the moving ring, and a spring is sleeved on the rubber sleeve and used for pushing the moving ring to tightly press the moving ring on the static ring.

4. The long shaft deep well fire pump unit of claim 3, wherein: the lower surface of the machine seal cover is provided with a groove matched with the static ring, and the static ring is embedded in the groove of the machine seal cover.

5. The long shaft deep well fire pump unit of claim 2, wherein: the locating ring is fixed on the pump shaft through a pin.

6. The long shaft deep well fire pump unit of claim 1, wherein: the motor passes through the motor support and links to each other with the pump seat, the output shaft of motor passes through the shaft coupling and links to each other with the pump seat, the shaft coupling sets up in the inside of motor support.

7. The long shaft deep well fire pump unit of claim 1, wherein: the outer wall of the water raising pipe is provided with a support frame for fixing the water raising pipe, and a support bearing is arranged between the support frame and the water raising pipe.

8. The long shaft deep well fire pump unit of claim 1, wherein: the impeller is connected with the pump base through a taper sleeve, and the outer diameter of the taper sleeve is large at the top and small at the bottom.

9. The long shaft deep well fire pump unit according to any one of claims 1 to 8, wherein: the water inlet device is characterized in that a filter screen plate is arranged on the upper portion of an inner cavity of the water inlet shell and is connected with the lower end of the pump shaft through a lower shell bearing in a rotating mode.

10. The long shaft deep well fire pump package of claim 9, wherein: and a pressure gauge is arranged at the water outlet of the pump seat.