CN209976893U

CN209976893U - Hastelloy pump case

Info

Publication number: CN209976893U
Application number: CN201920877078.XU
Authority: CN
Inventors: 张鸿武; 黄尚国
Original assignee: Chengdu Sailehua New Motor Coltd
Current assignee: Chengdu Sailehua New Motor Coltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-01-21
Anticipated expiration: 2029-06-12

Abstract

The utility model discloses a hastelloy pump shell, which comprises a shell, wherein an impeller cavity for installing an impeller is arranged in the shell, the impeller cavity is a molded line impeller cavity, so that fluid can flow out along a molded line, the radial section of the inner wall of the impeller cavity is a smooth curve, and the curvature radius of the smooth curve is gradually reduced to 133 cm from 220 cm; the utility model has reasonable design and simple structure, prolongs the service time of the pump case, reduces the maintenance period, saves the maintenance cost, powerfully ensures the production and reduces the risk of injury to personnel by improving and optimizing; meanwhile, the molded line of the impeller cavity is improved, so that the liquid flows more smoothly, the stress is more uniform, the casting of the pump shell is facilitated, the yield is improved, and the material waste is reduced.

Description

Hastelloy pump case

Technical Field

The utility model relates to a fluid conveying machinery especially relates to a hastelloy pump case.

Background

The centrifugal pump is mainly composed of a rotating part, a pump shell part, a sealing part, a balancing part, a bearing part, a transmission part and the like. The centrifugal pump shell mainly has the following functions:

1. uniformly introducing the liquid into the impeller, collecting the liquid flowing out of the impeller at high speed, and sending the liquid into a lower-stage impeller or a guide outlet (changing the flowing direction of the liquid);

2. energy conversion is realized, and kinetic energy is changed into pressure energy;

3. connect other parts and play a supporting role.

However, in chemical plants, the medium to be conveyed by many centrifugal pumps has high corrosivity, the pump shell made of common materials has poor corrosion resistance, short service time and short maintenance period, and the corrosion condition is invisible.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to overcome the defects, the utility model provides a centrifugal pump casing with reasonable design and simple structure, which prolongs the service time of the casing, reduces the maintenance period, saves the maintenance cost, strongly ensures the production and reduces the risk of injury to personnel through improvement and optimization; meanwhile, the molded line of the impeller cavity is improved, so that the liquid flows more smoothly, the stress is more uniform, the casting of the pump shell is facilitated, the yield is improved, and the material waste is reduced.

The utility model discloses a realize like this, construct a hastelloy pump case, which comprises a housin, the inside impeller cavity that is used for installing the impeller that is provided with of casing, this impeller cavity be molded lines impeller cavity, make its fluid can flow along the molded lines, the impeller cavity inner wall is glossy curve in radial cross-section, and this glossy curve curvature radius is reduced to 133 centimetres by 220 centimetres gradually.

Preferably, the liquid of the housing enters from an axially disposed liquid inlet and the liquid exits from a liquid outlet disposed tangentially to the impeller cavity.

Preferably, a flange is arranged at the outer end of the liquid inlet, an inwards concave sealing groove is formed in the end portion of the flange, and a plurality of axial mounting holes are formed in the flange.

Preferably, the outer end of the liquid outlet is provided with a flange A, the flange is provided with a concave sealing groove A, and the flange A is provided with a plurality of mounting holes A.

Preferably, the end face of the casing at the end for mounting the impeller is provided with a screw hole.

Preferably, the pump shell is integrally formed by casting the Hastelloy.

The utility model discloses following beneficial effect has:

the utility model has reasonable design and simple structure, is a pump shell of the centrifugal pump, prolongs the service time of the pump shell, reduces the maintenance period, saves the maintenance cost, powerfully ensures the production and reduces the risk of injury to personnel through improvement and optimization; meanwhile, the molded line of the impeller cavity is improved, so that the liquid flows more smoothly, the stress is more uniform, the casting of the pump shell is facilitated, the yield is improved, and the material waste is reduced.

The utility model selects the hastelloy material with good corrosion resistance, and the corrosion resistance of the pump shell is improved; then, according to the size and the shape of the impeller, an impeller cavity is designed, so that the clearance between the impeller and the cavity is suitable, and cavitation is not generated; meanwhile, the molded lines are reasonably designed, so that the sufficient wall thickness and strength of the shell are ensured while the fluid smoothly flows out along the molded lines.

Drawings

Fig. 1 is a schematic axial cross-sectional view of the present invention;

FIG. 2 is a schematic view of the present invention mounted with an impeller;

fig. 3 is a schematic view of the radial cross section of the present invention;

in the figure: 1. a housing; 2. an impeller cavity; 3. a liquid outlet; 4. a sealing groove A; 5. a flange A; 6. a mounting hole A; 7. a liquid inlet; 8. mounting holes; 9. a sealing groove; 10. screw holes; 11. an impeller.

Detailed Description

The present invention will be described in detail with reference to fig. 1 to 3, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, the utility model provides a hastelloy pump case herein, including casing 1, the casing is inside to be provided with the impeller cavity 2 that is used for installing impeller 11, and this impeller cavity is the molded lines impeller cavity, makes its fluid can flow out along the molded lines, the impeller cavity inner wall is smooth curve in radial cross-section, and this smooth curve radius of curvature reduces to 133 centimetres from 220 centimetres gradually.

In this embodiment, the liquid in the housing 1 enters from an axially disposed liquid inlet 7 and the liquid exits from a liquid outlet 3 disposed tangentially to the impeller cavity.

In this embodiment, the outer end of the liquid inlet is provided with a flange, the end of the flange is provided with a concave sealing groove 9, and the flange is provided with a plurality of axial mounting holes 8.

In this embodiment, the outer end of the liquid outlet 3 is provided with a flange a5, the flange is provided with a concave sealing groove a4, and the flange a5 is provided with a plurality of mounting holes a 6.

In this embodiment, the end surface of the housing 1 where the impeller is mounted is provided with a screw hole 10.

In the embodiment, the pump shell is integrally formed by casting the Hastelloy.

As shown in fig. 3, the molded line is formed by smoothly connecting a section of curve, and the curvature radius is gradually increased from 220 cm to 133 cm; the smaller the curvature radius is, the larger the work is, the wall thickness is increased, the strength is increased, but the fluidity of the metal is poor during casting; the curvature radius is large, the metal fluidity is good, but the work is reduced, the wall thickness is reduced, and the strength is reduced.

When the pump is implemented, an impeller cavity is arranged in a pump shell and used for placing an impeller, liquid enters the impeller cavity through a liquid inlet, and flows to a liquid outlet at a high speed along the molded line of the impeller cavity through the high-speed rotation of the impeller, so that kinetic energy is converted into pressure energy; the utility model discloses a corrosion-resistant hastelloy material, the impeller cavity of molded lines has been optimized in whole casting, and casting process has adopted precision casting, optimizes whole shape, and perfect solution hastelloy mobility is poor, problem that the yield is low.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hastelloy pump casing comprising a casing (1), characterized in that: an impeller cavity (2) for mounting an impeller (11) is arranged in the shell, the impeller cavity is a molded impeller cavity, so that fluid can flow out along a molded line, the radial section of the inner wall of the impeller cavity is a smooth curve, and the curvature radius of the smooth curve is gradually reduced to 133 cm from 220 cm.

2. A hastelloy pump casing as claimed in claim 1, wherein: the liquid of the shell (1) enters from a liquid inlet (7) arranged axially, and the liquid is output from a liquid outlet (3) arranged along the tangent line of the impeller cavity.

3. A hastelloy pump casing as claimed in claim 2, wherein: the outer end of the liquid inlet is provided with a flange plate, the end part of the flange plate is provided with an inwards concave sealing groove (9), and meanwhile, the flange plate is provided with a plurality of axial mounting holes (8).

4. A hastelloy pump casing as claimed in claim 2, wherein: the outer end of the liquid outlet (3) is provided with a flange A (5), the flange is provided with an inwards concave sealing groove A (4), and the flange A (5) is provided with a plurality of mounting holes A (6).

5. A hastelloy pump casing as claimed in claim 1, wherein: the end face of the casing (1) at the impeller mounting end is provided with a screw hole (10).

6. A hastelloy pump casing according to any one of claims 1-5 wherein: the pump shell is integrally formed by casting Ha-type alloy.