CN211116629U

CN211116629U - Centrifugal pump for conveying medium containing particles

Info

Publication number: CN211116629U
Application number: CN201921855695.6U
Authority: CN
Inventors: 周大财
Original assignee: Shanghai Bainuo Pumps And Valves Co ltd
Current assignee: Shanghai Bainuo Pumps And Valves Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-07-28
Anticipated expiration: 2029-10-31

Abstract

The utility model relates to a centrifugal pump for carrying contain granule medium, including the pump body, pump shaft, impeller, pump cover, mechanical seal to and the driving piece, enclose into the pump chamber between the pump cover and the pump body, the pump shaft sets up in the pump chamber, and its one end passes the pump cover and is connected the driving piece still is provided with mechanical seal between pump cover and pump shaft, the pump shaft still is provided with on arranging the tip in the pump chamber the impeller, the medium outlet end department of the pump body still is equipped with the filter, has enclosed round annular filter screen on the internal face of this filter, still draws forth a communicating pipe from annular filter screen department, and this communicating pipe still connects mechanical seal. Compared with the prior art, the utility model discloses the granule can not appear and pile up the pump entry jam that causes, and the no-load condition takes place, and need not personnel's periodic cleaning, can not cause the jam, has solved the difficult problem that the centrifugal pump can't carry the granule.

Description

Centrifugal pump for conveying medium containing particles

Technical Field

The utility model relates to a centrifugal pump technical field, concretely relates to a centrifugal pump for carrying contain granule medium.

Background

The conventional centrifugal pump in the prior art can not convey the medium containing particles, the particle medium exists, the filter is generally placed at the pump inlet, the filter is normally conveyed after being used as a cleaning medium, the structural defect is obvious, the particles filtered out in the medium exist in the inlet filter, people are required to clean the filter regularly, and once the filter is not cleaned timely, the inlet can be blocked, so that the centrifugal pump is damaged and cannot be normally used.

Chinese patent CN 106122108B discloses a centrifugal pump mechanical seal washing unit, belongs to centrifugal pump technical field, including connecting communicating pipe on the centrifugal pump, the feed liquor end of communicating pipe is connected with the exit end of centrifugal pump, and the play liquid end of communicating pipe is connected with the mechanical seal of centrifugal pump, be connected with tubular filter, manometer and orifice plate on communicating pipe, tubular filter is close to the exit end of centrifugal pump, the orifice plate is close to the mechanical seal of centrifugal pump, be provided with first stop valve and second stop valve on communicating pipe, first stop valve is located between the exit end of centrifugal pump and tubular filter, the second stop valve is located between manometer and the orifice plate. The filter in the device is arranged on the communicating pipe, namely, the medium firstly enters the liquid inlet end of the communicating pipe and then enters the filter, when the medium entering the centrifugal pump contains too many particles, the blockage in the communicating pipe is easy to cause, and the tubular filter can only remove a small amount of particles.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to solve the above problems and to provide a centrifugal pump for transporting a medium containing particles.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a centrifugal pump for carrying contain granule medium, includes the pump body, pump shaft, impeller, pump cover, mechanical seal to and the driving piece, enclose into the pump chamber between pump cover and the pump body, the pump shaft sets up in the pump chamber, and its one end passes the pump cover and is connected the driving piece still is provided with mechanical seal between pump cover and pump shaft, the pump shaft still is provided with on arranging the tip in the pump chamber the impeller, the medium outlet end department of the pump body still is equipped with the filter, has enclosed round annular filter screen on the internal face of this filter, still draws forth a communicating pipe from annular filter screen department, and this communicating pipe still connects mechanical seal.

Further, the annular filter screen comprises an inner filter screen and an outer filter screen, wherein the aperture of the inner filter screen is larger than that of the outer filter screen.

Furthermore, the outer side wall surface of the mechanical seal is provided with a boss which can abut against the end surface of the pump cover, and the end surface of the pump cover is also detachably provided with a sealing gland which can press the boss and allow the pump shaft to pass through.

Furthermore, the sealing gland and the pump cover are fixedly installed through fastening screws.

Furthermore, the sealing gland is annular, the inner end face of the sealing gland is partially sunken, and the sealing gland and the pump cover are matched to form a cavity for clamping two ends of the boss.

Furthermore, the pump shaft and the driving piece are fixed through a set screw.

Further, the driving member is a motor.

Furthermore, the communicating pipe is connected with one side of the mechanical seal close to the pump cover.

The utility model discloses with the filter setting of generally setting on the pump body entry of centrifugal pump or pump body bypass position at the exit end of the pump body, and be connected the filter with mechanical seal, make cleaning medium flow back to mechanical seal as the flush fluid, wash inside the pump body, both realized need not personnel's periodic cleaning, and simultaneously, the setting of communicating pipe has also applyed high-pressure environment on one side of pump cover at mechanical seal, the inside of centrifugal pump inner parts such as impurity granule infiltration mechanical seal in the inside lower compression environment of pump chamber has effectively been avoided, and then cause the damage to it.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the service life is long: the mechanical seal does not need to be cleaned regularly by personnel, and cannot be blocked.

(2) Safe and reliable: because the filter is arranged at the outlet of the centrifugal pump, the blockage of the inlet of the pump caused by the accumulation of particles and the no-load condition can not occur.

(3) The particle-containing medium can be conveyed: the problem that the centrifugal pump cannot convey particles is solved.

Drawings

Fig. 1 is a schematic structural diagram of a centrifugal pump for conveying a medium containing particles according to the present invention.

In the figure: 1-a pump body; 2-a filter; 3-ring filter screen; 4-communicating tube; 5, mechanical sealing; 6-pump cover; 7-a boss; 8-sealing gland.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

A centrifugal pump for conveying medium containing particles is structurally shown in figure 1 and comprises a pump body 1, a pump shaft, an impeller, a pump cover 6, a mechanical seal 5 and a driving piece, wherein a pump cavity is formed between the pump cover 6 and the pump body 1 in a surrounding mode, the pump shaft is arranged in the pump cavity, one end of the pump shaft penetrates through the pump cover 6 and is connected with the driving piece, the mechanical seal 5 is further arranged between the pump cover 6 and the pump shaft, the impeller is further arranged on the end portion, arranged in the pump cavity, of the pump shaft, a filter 2 is further arranged at the medium outlet end of the pump body 1, a circle of annular filter screen 3 is arranged on the inner wall face of the filter 2 in a surrounding mode, a communicating pipe 4 is further led.

In this embodiment, annular filter screen 3 includes inside and outside two-layer filter screen, and wherein, the aperture of inlayer filter screen is greater than the aperture of outer filter screen, and then can effectively improve annular filter screen 3 to high pressure transport medium's filter effect.

Referring to fig. 1 again, a boss 7 capable of abutting against the end face of the pump cover 6 is formed on the outer side wall surface of the mechanical seal 5, and a seal gland 8 capable of pressing the boss 7 and allowing a pump shaft to pass through is detachably mounted on the end face of the pump cover 6. The sealing gland 8 and the pump cover 6 are fixedly installed through fastening screws. The sealing gland 8 is annular, the inner end surface of the sealing gland is partially sunken, and the sealing gland and the pump cover 6 are matched to form a cavity for clamping two ends of the boss 7. The pump shaft and the driving piece are fixed through a set screw. The driving member is a motor. The communicating pipe 4 is connected with one side of the mechanical seal 5 close to the pump cover 6.

The utility model discloses filter 2 that will generally set up on the 1 entry of the pump body of centrifugal pump or the 1 bypass position of the pump body sets up the exit end at the pump body 1, and be connected filter 2 with mechanical seal 5, make cleaning medium flow back to mechanical seal 5 as the flush fluid, wash pump body 1 inside, both realized need not personnel's regular clearance, and simultaneously, the setting of communicating pipe 4 has also applyed high-pressure environment in mechanical seal 5 is close to pump cover 6 one side, the inside of centrifugal pump inner parts such as effectively having avoided the impurity granule infiltration mechanical seal 5 in the inside lower compression ring environment of pump chamber, and then cause the damage to it.

In the above embodiments, all the mechanical seals used are mechanical seal structures for pumps commonly used in the art, and the rest of the functional components, if not specifically described, are conventional components in the art for implementing corresponding functions.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. The utility model provides a centrifugal pump for carrying contain granule medium, includes the pump body, pump shaft, impeller, pump cover, mechanical seal to and the driving piece, enclose into the pump chamber between pump cover and the pump body, the pump shaft sets up in the pump chamber, and its one end passes the pump cover and is connected the driving piece still is provided with mechanical seal between pump cover and pump shaft, still be provided with on the tip that the pump chamber was arranged in to the pump shaft the impeller, its characterized in that, the medium outlet end department of the pump body still is equipped with the filter, has enclosed round annular filter screen on the internal face of this filter, still draws forth a communicating pipe from annular filter screen department, and this communicating pipe still connects mechanical seal.

2. A centrifugal pump for conveying a particle-containing medium as recited in claim 1, wherein said annular screen comprises an inner screen and an outer screen, wherein the inner screen has a larger pore size than the outer screen.

3. A centrifugal pump for delivering media containing particles as claimed in claim 1, wherein the outer wall of said mechanical seal is formed with a boss which can abut against the end face of said pump cover, and a seal gland which can press said boss and through which the pump shaft passes is detachably mounted on the end face of said pump cover.

4. A centrifugal pump for transporting particle-containing media according to claim 3, wherein the gland and the pump cover are fixedly mounted by fastening screws.

5. A centrifugal pump for transporting granular-media according to claim 3, wherein said gland is annular, and has a concave inner end surface, and cooperates with said pump cover to form a cavity for clamping both ends of said boss.

6. A centrifugal pump for transporting a particulate containing medium as claimed in claim 1 wherein said pump shaft is secured to said drive member by a set screw.

7. A centrifugal pump for transporting a particulate-containing medium as recited in claim 1, wherein said drive member is an electric motor.

8. A centrifugal pump for transporting particle-containing media according to claim 1, wherein said communicating tube connects said mechanical seal to the pump cover side.