CN214465135U

CN214465135U - Stamping and welding formed centrifugal pump shell

Info

Publication number: CN214465135U
Application number: CN202120502183.2U
Authority: CN
Inventors: 何必成
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-10-22
Anticipated expiration: 2031-03-09

Abstract

The utility model belongs to the technical field of the centrifugal pump, concretely relates to punching press weld forming centrifugal pump shell, it includes the radial outside crescent spiral casing of punching press stretch forming's pipe fitting and punching press coiling shaping, the pipe fitting is equipped with inlet pipe portion, centrifugal chamber pipe portion, impeller entry pipe portion along the axial in proper order, the laminating of spiral casing internal perisporium is fixed on the periphery wall of centrifugal chamber pipe portion and through welded sealing connection be equipped with the centrifugal apopore of intercommunication centrifugal chamber pipe portion inner chamber and spiral casing inner chamber in the centrifugal chamber pipe portion. The utility model discloses the effect that has the water conservancy diversion after the footpath piece that leaves behind the pipe fitting upper shed is to fluid angle modulation makes the centrifugal pump more can bear fluidic impulse pressure effect.

Description

Stamping and welding formed centrifugal pump shell

Technical Field

The utility model belongs to the technical field of the centrifugal pump, concretely relates to punching press weld forming centrifugal pump shell.

Background

The centrifugal pump is a general mechanical product with large demand and wide application range, and is widely applied to various fields, the manufacturing method of the centrifugal pump shell generally adopts a casting method, the shell manufactured by the casting method has high strength and long service life, and meets the use standard of the centrifugal pump, but the casting method is a process with high power consumption, more consumables, high labor intensity and environmental pollution, and therefore, the manufacturing cost of the centrifugal pump shell cannot be reduced. At present, there are processes of stamping and welding for manufacturing centrifugal pump housings, such as a micro centrifugal pump formed by stamping and welding a metal plate disclosed in patent cn98250327.x and a stainless steel volute pump formed by stamping and welding disclosed in patent cn01231322.x, and the like, and the existing stamping and welding structures are prone to leak caused by gaps when pressure changes are large (i.e. when impact pressure is large).

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming and not enough that prior art exists, and provide a punching press welded forming centrifugal pump shell.

The utility model discloses the technical scheme who takes as follows: the utility model provides a punching press weld forming centrifugal pump casing, its radial outside crescent spiral casing that includes punching press stretch forming's pipe fitting and punching press coiling, the pipe fitting is equipped with inlet pipe portion, centrifugal chamber pipe portion, impeller inlet pipe portion in proper order along the axial, the laminating of spiral casing internal perisporium is fixed on the periphery wall of centrifugal chamber pipe portion and through welded sealing connection, the outer end of spiral casing is equipped with outlet pipe portion, be equipped with the centrifugal apopore of intercommunication centrifugal chamber pipe portion inner chamber and spiral casing inner chamber on the centrifugal chamber pipe portion.

The round pipe fitting is a round pipe fitting.

The inner diameter of the centrifugal chamber pipe part is larger than that of the water inlet pipe part.

The outer tip of inlet pipe portion is equipped with inlet tube flange, inlet tube flange be with inlet pipe portion, centrifugal chamber pipe portion, impeller entry pipe portion integrative punching press stretch forming or stretch alone or cut behind the shaping fixedly with inlet pipe portion welded connection.

The water outlet pipe part is formed by independent stretching and then is fixedly connected with the spiral volute in a welding mode.

The outer end of the water outlet pipe part is provided with a water outlet pipe connecting flange, and the water outlet pipe connecting flange is welded and connected with the water outlet pipe part after being integrally stamped, stretched and formed or being separately stretched and formed with the water outlet pipe part.

The utility model has the advantages as follows: the utility model discloses improve the punching press welded structure of centrifugal pump casing, the effect that has the water conservancy diversion after the footpath piece that leaves behind the pipe fitting upper shed is to the fluid angle modulation, makes the centrifugal pump more can bear fluidic impulse pressure effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings obtained from these drawings still belong to the scope of the present invention without inventive laboriousness.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic view of the direction of fluid flow under the action of an impeller;

FIG. 5 is a schematic view of a process for manufacturing a circular tube;

FIG. 6 is a schematic view of another alternative process for manufacturing a circular tube;

FIG. 7 is a schematic view of a process for manufacturing a centrifugal pump housing;

FIG. 8 is a schematic view of another alternative process for manufacturing spiral volutes;

in the drawings, 1, a circular tube; 101, a water inlet pipe part; 102, a centrifugal chamber tube part; 103, an impeller inlet pipe portion; 104, centrifuging to form a water outlet; 105, connecting a water inlet pipe with a flange; 106, a motor connecting flange; 2, a spiral volute; 3, a water outlet pipe part; 301, a water outlet pipe is connected with a flange; 4, an impeller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the invention.

As shown in fig. 1-3, a punching press weld forming centrifugal pump casing, it includes punching press stretch forming's pipe spare 1 and punching press coiling forming's radial outside spiral casing 2 that gradually increases, pipe spare 1 is equipped with inlet pipe portion 101, centrifugal chamber pipe portion 102, impeller inlet pipe portion 103 along the axial in proper order, the laminating of spiral casing 2 internal perisporium is on the periphery wall of centrifugal chamber pipe portion 102 and fixed through welded seal connection, the outer end of spiral casing 2 is equipped with outlet pipe portion 3, be equipped with the centrifugal apopore 104 that communicates centrifugal chamber pipe portion 102 inner chamber and spiral casing 2 inner chamber on the centrifugal chamber pipe portion 102.

As shown in fig. 4, the radial sheet left after the opening on the circular pipe member has a flow guiding effect after the angle adjustment of the fluid, so that the centrifugal pump can bear the impact pressure of the fluid.

The process of making the above-described embodiment includes the steps of:

(1) forming a round pipe fitting 1 by stamping and drawing;

(2) the spiral volute 2 which is gradually increased radially outwards is formed by punching and winding, and the spiral volute 2 is fixed outside the centrifugal chamber pipe part 102 in a welding mode.

Specifically, the inside diameter of the centrifugal chamber tube part 102 is larger than the inside diameter of the water inlet tube part 101. Therefore, the punching and drawing process of the round pipe fitting 1 includes forming the water inlet pipe part 101, the centrifugal chamber pipe part 102 and the impeller inlet pipe part 103 through the reducing pipe processing die.

The outer end of the water inlet pipe part 101 is provided with a water inlet pipe connecting flange 105, and the water inlet pipe connecting flange 105 is welded and connected with the water inlet pipe part 101 after being integrally stamped, stretched and formed or separately stretched or cut and formed with the water inlet pipe part 101, the centrifugal chamber pipe part 102 and the impeller inlet pipe part 103.

The outer end of the impeller inlet pipe part 103 is provided with a motor connecting flange 106, and the motor connecting flange 106 is welded and connected with the impeller inlet pipe part 103 after being integrally stamped, stretched and formed or separately stretched or cut and formed with the water inlet pipe part 101, the centrifugal chamber pipe part 102 and the impeller inlet pipe part 103.

Therefore, the process for preparing the round pipe member 1 can be as shown in fig. 5, and comprises the following steps:

(1-1) integrally stamping and stretching the circular pipeline with the same diameter into a variable diameter circular pipeline with a water inlet pipe part 101, a centrifugal chamber pipe part 102, an impeller inlet pipe part 103, a water inlet pipe connecting flange 105 and a motor connecting flange 106;

and (1-2) a centrifugal water outlet hole 104 is formed in a centrifugal chamber pipe part 102 in the diameter-variable circular pipeline prepared in the step (1-1).

Alternatively, the process for preparing the round pipe fitting 1 can be as shown in fig. 6, and comprises the following steps:

(1-1) integrally stamping and stretching the circular pipeline with the same diameter into a variable diameter circular pipeline with a water inlet pipe part 101, a centrifugal chamber pipe part 102 and an impeller inlet pipe part 103;

(1-2) a centrifugal water outlet hole 104 is formed in a centrifugal chamber pipe part 102 in the diameter-variable circular pipeline;

(1-3) welding a water inlet pipe connecting flange 105 and a motor connecting flange 106 which are formed by independent stretching or cutting at two ends of the reducing circular pipeline;

the step (1-3) can be carried out before or after the step (1-2) is carried out, and the two steps do not have a necessary sequence relationship.

The water outlet pipe part 3 is formed by independent stretching and then is fixedly connected with the spiral volute 2 in a welding mode.

Therefore, the spiral volute 2 and the outlet pipe portion 3 may be prepared as shown in fig. 7, and include the following steps:

(2-1) forming a spiral volute 2 which gradually increases outwards in the radial direction by punching and winding the cut metal plate;

(2-2) forming a water outlet pipe part 3 by stamping and drawing, wherein the water outlet pipe part is a bent pipeline as shown in the figure;

(2-3) welding the water outlet pipe part 3 to the outer end part of the spiral volute 2.

In the step (2-1), the spiral volute 2 may be formed by punching and winding a whole metal plate, or may be formed by punching and welding a plurality of separate metal plates to form a component separately as shown in fig. 8, and then the spiral volute 2 is formed by assembling and welding, both the two modes are possible, the spiral volute 2 formed by a whole metal plate has stronger strength, but the difficulty requirement of the process is reduced by the mode of punching a plurality of separate metal plates separately and then assembling and welding, and the spiral volute 2 can be selected according to the design requirement of an actual product.

In the step (2-1), the spiral volute 2 may be formed by stamping and winding the spiral volute 2, and then the spiral volute 2 is sleeved outside the centrifugal chamber pipe portion 102, at this time, a large gap is formed between the spiral volute 2 and the centrifugal chamber pipe portion 102, and solder is applied to the gap for welding. In the step (2-1), the spiral volute 2 may also be formed by stamping along the periphery of the centrifugal chamber pipe portion 102, first attaching and fixing a short edge (the length of which corresponds to the width of the spiral volute 2) of a metal plate to the outer side wall of the centrifugal chamber pipe portion 102, then stamping to form the spiral volute 2 gradually increasing radially outwards, keeping the edges of the two sides attached to the outer side wall of the centrifugal chamber pipe portion 102, and then welding.

The outer tip of play water pipe portion 3 is equipped with outlet pipe connection flange 301, outlet pipe connection flange 301 is fixed with play water pipe portion 3 welded connection after for the integrative punching press stretch forming of play water pipe portion 3 or stretch forming alone.

The utility model provides a centrifugal pump, includes centrifugal pump shell, motor, impeller 4, the centrifugal pump shell is as above punching press welded forming centrifugal pump shell, the motor is located impeller inlet pipe portion 103 outside and is connected with impeller inlet pipe portion 103, the impeller is located centrifugal chamber pipe portion 102 inner chamber, the motor can drive the impeller and make its rotation and the rotation direction of impeller corresponding with spiral volute 2's radial increase direction.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. The utility model provides a punching press welding shaping centrifugal pump shell which characterized in that: it includes radial outside crescent spiral case (2) of drawing shaping's pipe fitting (1) and punching press coiling shaping, pipe fitting (1) is equipped with inlet pipe portion (101), centrifugal chamber pipe portion (102), impeller entry pipe portion (103) along the axial in proper order, the laminating of spiral case (2) internal perisporium is on the periphery wall of centrifugal chamber pipe portion (102) and fixed through welded seal connection, the outer end of spiral case (2) is equipped with outlet pipe portion (3), be equipped with the centrifugal apopore (104) of intercommunication centrifugal chamber pipe portion (102) inner chamber and spiral case (2) inner chamber on centrifugal chamber pipe portion (102).

2. The stamped, welded centrifugal pump housing of claim 1, wherein: the inner diameter of the centrifugal chamber pipe part (102) is larger than that of the water inlet pipe part (101).

3. The stamped, welded centrifugal pump housing of claim 1, wherein: the outer end of the water inlet pipe part (101) is provided with a water inlet pipe connecting flange (105), and the water inlet pipe connecting flange (105) is welded and connected with the water inlet pipe part (101) after being integrally stamped, stretched and formed or separately stretched or cut and formed with the water inlet pipe part (101), the centrifugal chamber pipe part (102) and the impeller inlet pipe part (103).

4. The stamped, welded centrifugal pump housing of claim 1, wherein: the water outlet pipe part (3) is formed by independent stretching and then is fixedly connected with the spiral volute (2) in a welding mode.

5. The stamped, welded centrifugal pump housing of claim 4, wherein: the outer tip of play water pipe portion (3) is equipped with outlet pipe connection flange (301), outlet pipe connection flange (301) are fixed with play water pipe portion (3) welded connection after for drawing forming with a water pipe portion (3) integrative punching press drawing forming or individual drawing forming.