CN212959310U

CN212959310U - Vertical centrifugal pump

Info

Publication number: CN212959310U
Application number: CN202021609470.5U
Authority: CN
Inventors: 狄辉彬
Original assignee: Zhejiang Shangpu Energy Equipment Co ltd
Current assignee: Zhejiang Shangpu Technology Group Co.,Ltd.
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-04-13
Anticipated expiration: 2030-08-05

Abstract

The utility model provides a vertical centrifugal pump belongs to mechanical technical field. It has solved the current not good problem of centrifugal pump life-span. The vertical centrifugal pump comprises a pump shell and a pump shaft vertically arranged in the pump shell, wherein the upper end of the pump shaft extends out of the pump shell, the sealing between the pump shaft and the pump shell is realized by adopting a mechanical sealing element, a flow channel for washing the mechanical sealing element is arranged in the pump shell, a joint is arranged outside the pump shell, an inner cavity of the joint is communicated with the flow channel through a pipeline, a through hole for communicating a pump cavity of the pump shell is arranged on the pump shell, a tubular liquid inlet end is arranged on the joint, a filter barrel is arranged between the liquid inlet end and the through hole, two ends of the filter barrel are respectively inserted into; the mouth of the filter vat faces the through hole, a positioning pipe is integrally formed in the middle of the bottom wall of the filter vat, the positioning pipe is located in the filter vat, liquid passing holes are densely distributed in the edge of the bottom wall of the filter vat, a magnetic column is clamped in the positioning pipe, the outer end of the magnetic column extends out of the positioning pipe, and the inner end of the magnetic column is pressed on the bottom wall of the filter vat. The vertical centrifugal pump has long service life.

Description

Vertical centrifugal pump

Technical Field

The utility model belongs to the technical field of machinery, a centrifugal pump, especially a vertical centrifugal pump are related to.

Background

Centrifugal pumps work by causing water to undergo centrifugal motion by the rotation of an impeller, and are classified into a vertical type and a horizontal type.

The existing vertical centrifugal pump generally comprises a pump casing, a pump shaft vertically arranged in the pump casing, an impeller driven by the pump shaft and a joint arranged outside the pump casing. The upper end of the pump shaft extends out of the pump shell, and a mechanical sealing element is adopted between the pump shaft and the pump shell to realize sealing; the pump shell is internally provided with a flow passage for flushing the mechanical sealing element, the pump shell is provided with a through hole communicated with the pump cavity of the pump shell, the liquid outlet end of the joint is communicated with the flow passage through a pipeline, and the liquid inlet end of the joint is communicated with the through hole.

In the actual product, the impeller generally adopts cast iron material, and it can take place wearing and tearing when using and produce iron fillings, and iron fillings flow to mechanical seal department through-hole, joint, pipeline and runner in proper order, can aggravate the wearing and tearing of mechanical seal and pump shaft, reduce life-span.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a long-lived vertical centrifugal pump.

The purpose of the utility model can be realized by the following technical proposal: a vertical centrifugal pump comprises a pump shell and a pump shaft vertically arranged in the pump shell, wherein the upper end of the pump shaft extends out of the pump shell, the pump shaft and the pump shell are sealed by adopting a mechanical sealing element, a flow channel for flushing the mechanical sealing element is arranged in the pump shell, a joint is arranged outside the pump shell, an inner cavity of the joint is communicated with the flow channel through a pipeline, a through hole communicated with a pump cavity of the pump shell is arranged on the pump shell, and a liquid inlet end which is opposite to the through hole and is tubular is arranged on the joint; the filter vat bung hole is towards the through-hole, and filter vat diapire middle part integrated into one piece has the registration arm, and both coaxial settings are located the filter vat, and the filter vat diapire edge gathers has the liquid hole of crossing along the filter vat axial, and the registration arm inside callipers is equipped with the magnetic column that shape and size all match rather than, and the registration arm is stretched out to the magnetic column outer end, and the magnetic column inner supports presses on the filter vat diapire.

Set up the magnetic column in the lauter tub for adsorb the iron fillings that contain in the liquid that flows into in the joint from pump body pump chamber, in order to prevent that iron fillings from flowing to mechanical seal department aggravates its wearing and tearing, play life-prolonging's effect.

In the vertical centrifugal pump, the outer end of the magnetic column is in a circular truncated cone shape, and the diameter of the outer end of the magnetic column gradually decreases from left to right. The outer end of the magnetic column is designed to be in a round table shape so as to guide by utilizing the outer surface of the magnetic column, and part of fluid flows along the outer surface of the magnetic column so as to realize better iron chip adsorption.

In the vertical centrifugal pump, the outer side walls of the two ends of the filter barrel are respectively provided with an annular groove, the two annular grooves are respectively internally provided with an o-shaped ring, and the peripheral surfaces of the two o-shaped rings are respectively abutted against the inner wall of the liquid inlet end and the wall of the through hole.

In the vertical centrifugal pump, the two ends of the filter barrel are detachably and fixedly connected with the liquid inlet end and the pump shell respectively through threads, so that scrap iron on the outer surface of the magnetic column can be cleaned conveniently.

In the vertical centrifugal pump, the right end face of the filter barrel is a first conical surface, a second conical surface matched with the first conical surface is arranged on the wall of the through hole, and the first conical surface is in close contact with the second conical surface so as to enhance the sealing effect formed between the filter barrel and the pump shell.

Compared with the prior art, the vertical centrifugal pump has the following advantages:

1. set up the magnetic column in the lauter tub for adsorb the iron fillings that contain in the liquid that flows into in the joint from pump body pump chamber, in order to prevent that iron fillings from flowing to mechanical seal department aggravates its wearing and tearing, play life-prolonging's effect.

2. The outer end of the magnetic column is designed to be in a round table shape so as to guide by utilizing the outer surface of the magnetic column, and part of fluid flows along the outer surface of the magnetic column so as to realize better iron chip adsorption.

Drawings

Fig. 1 is a schematic view of a vertical centrifugal pump.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is an enlarged schematic view of the structure at B in fig. 1.

Fig. 4 is an enlarged schematic view of the structure at C in fig. 3.

In the drawings, 1, a pump casing; 1a, a flow channel; 1b, a through hole; 2. a pump shaft; 3. a mechanical seal; 4. a joint; 4a, a liquid inlet end; 5. a pipeline; 6. a filter vat; 6a, a first conical surface; 6b, a positioning tube; 6c, a liquid passing hole; 7. an o-shaped ring; 8. a magnetic column.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the vertical centrifugal pump includes a pump casing 1 and a pump shaft 2 vertically arranged in the pump casing 1, wherein the upper end of the pump shaft 2 extends out of the pump casing 1, and a mechanical seal 3 is adopted between the pump shaft 2 and the pump casing 1 for realizing sealing. A flow channel 1a for flushing the mechanical sealing element 3 is arranged in the pump shell 1, a connector 4 is arranged outside the pump shell 1, and the inner cavity of the connector 4 is communicated with the flow channel 1a through a pipeline 5. In the present embodiment, the connection modes of the mechanical seal 3, the flow passage 1a, the joint 4, the pipeline 5 and the flow passage 1a are all the prior art, and will not be described in detail herein.

Specifically, as shown in fig. 3 and 4, the pump casing 1 has a through hole 1b communicating with the pump cavity of the pump casing 1, and the through hole 1b is horizontally arranged in an actual product. The joint 4 is provided with a tubular liquid inlet end 4a which is opposite to the through hole 1b, and the liquid inlet end 4a is in a straight pipe shape and is internally provided with threads. As shown in fig. 1, a filter vat 6 is arranged between the liquid inlet end 4a and the through hole 1b, and the filter vat 6, the liquid inlet end 4a and the through hole 1b are coaxially arranged. The left end and the right end of the filter vat 6 are respectively closed and open, that is, the opening of the filter vat 6 is arranged towards the through hole 1 b. The right and left ends of the filter vat 6 are respectively inserted into the through hole 1b and the liquid inlet end 4a, and the two ends of the filter vat 6 are respectively and fixedly connected with the liquid inlet end 4a and the pump shell 1 in a sealing way. In this embodiment, all be equipped with the ring channel on the both ends lateral wall of lauter tub 6, all be equipped with o shape circle 7 in two ring channels, and the outer peripheral face of two o shape circles 7 offsets with inlet end 4a inner wall and through-hole 1b pore wall respectively, makes lauter tub 6 and inlet end 4a and lauter tub 6 and through-hole 1b between all form reliable sealedly. The both ends of preferential straining basket 6 all can dismantle with feed liquor end 4a and pump case 1 respectively through the screw and link firmly to 6 dismouting of straining basket. Further, the right end face of the filter barrel 6 is a first conical surface 6a, a second conical surface matched with the first conical surface 6a is arranged on the wall of the through hole 1b, and the first conical surface 6a is in close contact with the second conical surface to enhance the sealing effect formed between the filter barrel 6 and the pump shell 1.

As shown in fig. 3, a positioning tube 6b is integrally formed in the middle of the bottom wall of the filtering barrel 6, and the positioning tube 6b is located in the filtering barrel 6 and coaxially disposed with the filtering barrel. Liquid passing holes 6c which penetrate through the filter vat 6 along the axial direction are densely distributed on the edge of the bottom wall of the filter vat 6, magnetic columns 8 which are matched with the positioning tubes 6b in shape and size are clamped in the positioning tubes 6b, the outer ends of the magnetic columns 8 extend out of the positioning tubes 6b, and the inner ends of the magnetic columns 8 are pressed on the bottom wall of the filter vat 6. Set up magnetic column 8 in straining bucket 6 for adsorb the iron fillings that contain in the liquid that flows into in connecting 4 from pump body pump chamber, in order to prevent that iron fillings from flowing to mechanical seal 3 department aggravates its wearing and tearing, play increase of service life's effect. Further, the outer end of the magnetic column 8 is in a circular truncated cone shape, and the diameter of the outer end of the magnetic column 8 gradually decreases from left to right. The outer end of the magnetic column 8 is designed to be in a round table shape so as to guide by utilizing the outer surface of the magnetic column 8, and part of fluid flows along the outer surface of the magnetic column 8 so as to realize better iron scrap adsorption effect.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A vertical centrifugal pump comprises a pump shell (1) and a pump shaft (2) vertically arranged in the pump shell (1), wherein the upper end of the pump shaft (2) extends out of the pump shell (1), and the pump shaft (2) and the pump shell (1) are sealed by a mechanical sealing element (3), a flow channel (1a) for washing the mechanical sealing element (3) is arranged in the pump shell (1), a joint (4) is arranged outside the pump shell (1), the inner cavity of the joint (4) is communicated with the flow channel (1a) through a pipeline (5), a through hole (1b) communicated with the pump cavity of the pump shell (1) is arranged on the pump shell (1), a liquid inlet end (4a) which is opposite to the through hole (1b) and is tubular is arranged on the joint (4), it is characterized in that a filter vat (6) is arranged between the liquid inlet end (4a) and the through hole (1b), two ends of the filter vat (6) are respectively inserted into the through hole (1b) and the liquid inlet end (4a), two ends of the filter barrel (6) are respectively and fixedly connected with the liquid inlet end (4a) and the pump shell (1) in a sealing way; lauter tub (6) bung hole is towards through-hole (1b), lauter tub (6) diapire middle part integrated into one piece has registration arm (6b), registration arm (6b) are located lauter tub (6) and both coaxial settings, the dense cloth of lauter tub (6) diapire edge has along lauter tub (6) axial through liquid hole (6c), registration arm (6b) inside callipers is equipped with shape and size and all rather than magnetic column (8) that match, registration arm (6b) are stretched out to magnetic column (8) outer end, and magnetic column (8) inner support press on lauter tub (6) diapire.

2. Vertical centrifugal pump according to claim 1, characterized in that the outer end of the magnetic column (8) is in the shape of a truncated cone, and the diameter of the outer end of the magnetic column (8) gradually decreases from left to right.

3. The vertical centrifugal pump according to claim 1 or 2, wherein the outer side walls of the two ends of the filter barrel (6) are respectively provided with an annular groove, the two annular grooves are respectively provided with an o-shaped ring (7), and the outer peripheral surfaces of the two o-shaped rings (7) are respectively abutted against the inner wall of the liquid inlet end (4a) and the wall of the through hole (1 b).

4. The vertical centrifugal pump according to claim 3, wherein both ends of the filter vat (6) are detachably and fixedly connected with the liquid inlet end (4a) and the pump shell (1) through threads.

5. The vertical centrifugal pump according to claim 1 or 2, wherein the right end face of the filter barrel (6) is a first conical surface (6a), the wall of the through hole (1b) is provided with a second conical surface matched with the first conical surface (6a), and the first conical surface (6a) and the second conical surface are in close contact.