CN217421642U

CN217421642U - Drainage structure for shielding pump water flow

Info

Publication number: CN217421642U
Application number: CN202221500114.9U
Authority: CN
Inventors: 王陈; 管敏成
Original assignee: Zhejiang Happy Pump Industry Co ltd
Current assignee: Zhejiang Happy Pump Industry Co ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-09-13
Anticipated expiration: 2032-06-15

Abstract

The utility model provides a drainage structure of canned motor pump rivers belongs to canned motor pump technical field. It has solved the big and poor stability's of current canned motor pump noise problem. The canned motor pump comprises a pump head and an impeller, wherein a water passing channel is arranged in the pump head, the impeller is arranged in the water passing channel, a water inlet is formed in the middle of the bottom of the impeller, a drainage structure comprises a drainage support fixedly connected in the water passing channel, and the drainage support is positioned right below the center of the impeller. This drainage structure has the advantage that reduces the noise.

Description

Drainage structure for shielding pump water flow

Technical Field

The utility model belongs to the technical field of the canned motor pump, a drainage structure of canned motor pump rivers is related to.

Background

The shield pump is a non-leakage pump formed by integrating a shield motor and a pump, is widely applied to various occasions in the fields of petrochemical industry, national defense and military industry, aerospace, air-conditioning refrigeration, cooling liquid cooling systems, medicines and foods, atomic energy and the like, and is also used for pressurizing drinking water delivery.

For example, chinese patent literature discloses a standard circulation output canned motor pump for drinking water [ application No.: 201920636022.5, respectively; authorization notice number: CN209800292U ], the canned motor pump comprises a pump head, the pump body, a stator, rotor and impeller, link to each other through the screw rigid coupling and form the draw-in groove in the junction between the pump head and the pump body, the edge card of shield cover is located in the draw-in groove, it is fixed that the screw is screwed to lie in bearing frame and flat pad in proper order to be located the below of shield cover in the draw-in groove simultaneously, install slide bearing in the bearing frame, lean on through footstep bearing counterbalance between slide bearing and the rotor, the pivot tip of rotor excessively cooperates there is the adapter sleeve, the outside axial of adapter sleeve is provided with the integral type arc piece that a plurality of rings circumference distribute, the inner circle of impeller seted up with arc piece structure matched with arc wall, the impeller is fixed in the pivot through arc wall and arc piece chucking.

The canned motor pump of this kind of structure, the tip of rotor shaft has linked firmly the impeller, the centre department of impeller bottom has the water inlet that is used for into water, rivers can directly enter into the impeller through the water inlet of impeller after passing through the inhalant canal of pump head, and during rivers entered into inhalant canal from the external world, rivers have anomalous motion, for example rivers are the heliciform etc., and anomalous rivers can produce great impact to the impeller, lead to the noise of impeller during operation big, poor stability.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that exists among the prior art, provide a drainage structure of canned motor pump rivers, the technical problem of solution is how to reduce the noise.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a drainage structure of canned motor pump rivers, canned motor pump includes pump head and impeller, water passing channel has in the pump head, the impeller sets up in water passing channel, the middle department of impeller bottom have a water inlet, its characterized in that, drainage structure is including linking firmly the drainage support in water passing channel, the drainage support is located the impeller center under.

During rivers entered into the water channel of pump head, when through the drainage support, the drainage support played the effect of breaing up, guiding to rivers, made the wadding flow, be spiral helicine rivers enter into the impeller after becoming the direct current, reduced rivers to the impact of impeller to reduce the noise of impeller during operation, improve stability simultaneously. The drainage support is located the water inlet department of impeller bottom and makes the drainage support play better effect of breaing up and guiding, makes the rivers after breaing up and guiding directly enter into the impeller, reduces rivers to the impact of impeller, noise reduction.

In foretell drainage structure of canned motor pump rivers, water channel includes the recessed drainage passageway that sets up of installation cavity, the recessed drainage chamber that sets up in pump head bottom and intercommunication installation cavity and the drainage chamber that sets up of pump head top, the drainage support is worn to establish in drainage passageway, the top of drainage support stretches into in the installation cavity and extends to the impeller, and the bottom is arranged in the drainage chamber. The water passing channel is reasonably arranged, so that the water flow is smooth, the impact of the water flow on the impeller is reduced, and the noise is reduced; the arrangement of the position of the drainage support enables the drainage support to play a better role in scattering and guiding, reduces the impact of water flow on the impeller and reduces noise.

In foretell drainage structure of canned motor pump rivers, the drainage support links firmly the branch parting bead in drainage post circumference including the drainage post that is located the middle part and equidistant, the bottom that the impeller was kept away from to the drainage post has the drainage face that is conical surface form, divide the parting bead with the chamber wall laminating at drainage chamber top link firmly and with the interval of setting for has between the chamber wall of drainage chamber bottom, the outer end of branch parting bead links firmly with the chamber wall laminating of drainage chamber lateral part. The arrangement of the flow guide surface enables water flow to flow in a set direction, so that the water flow can better flow to the blades outwards in the circumferential direction, the impeller can better throw water out, the impact of the water flow on the impeller is reduced, the noise is reduced, and the stability of the impeller is improved; the setting of parting bead breaks up the rivers etc. of spiral form, guarantees that rivers get into from the below of drainage support, then enters into the impeller through drainage channel, makes rivers more steady, reduces the impact, and the noise reduction improves the stability of impeller.

In the above-mentioned drainage structure of canned motor pump rivers, the inner of parting strip has the enhancement piece that sets up towards the impeller protrusion, the enhancement piece pastes the drainage post and sets up, the length direction of enhancement piece is parallel with the axial of drainage post. The strengthening piece is arranged to improve the strength, further guide the water flow to flow, improve the stability of the water flow and reduce the noise.

In the above-mentioned drainage structure for shield pump rivers, the cavity wall of drainage chamber has at least one step piece that the protrusion set up, the step piece is just facing the end of intaking of water channel and is set up, and when the quantity of step piece is more than or equal to two, a plurality of the step piece is step-like to be arranged. The setting of step piece plays the effect of breaing up rivers, reduces the inside stress of rivers, makes rivers flow direction drainage support that rivers can be better more steady, reduces the impact of rivers, improves canned motor pump's stability.

In the above-mentioned drainage structure of canned motor pump rivers, the one side that the step piece was towards water passageway water inlet end has and is curved water guide surface, water guide surface is by middle crooked setting towards both sides along the direction of rivers. The structure leads the water flow to be guided to flow according to the set direction, further improves the stability of the water flow, thereby reducing the impact and improving the stability of the canned motor pump.

In the above-mentioned drainage structure for shield pump rivers, the corner rounding of step piece is handled. Further guide rivers to flow, improve the stability of rivers to reduce the impact, improve canned motor pump's stability.

In foretell drainage structure of canned motor pump rivers, the pump head includes the pump body and pump cover, the pump cover links firmly in the bottom of the pump body just pump cover shutoff drainage chamber, the pump body and drainage support are through the integrated into one piece that moulds plastics. And the integral injection molding is convenient to process.

Compared with the prior art, the utility model provides a pair of drainage structure of canned motor pump rivers has following advantage:

1. this drainage structure reduces the inside stress of rivers through setting up drainage support and step piece, makes rivers flow smoothly, reduces the impact of rivers to the impeller to reduce the noise of impeller during operation, improve canned motor pump's stability.

2. The shielding pump body and the drainage support are integrally formed through injection molding, and the processing is convenient.

Drawings

Fig. 1 is a structural sectional view of the present canned motor pump.

FIG. 2 is a schematic diagram of the structure in the drainage cavity of the present canned motor pump.

Fig. 3 is a schematic view of the structure in the present canned motor pump mounting chamber.

In the figure, 1, a pump head; 11. a pump body; 12. a pump cover; 2. an impeller; 3. a water passage; 31. a mounting cavity; 32. a drainage lumen; 33. a drainage channel; 4. a drainage stent; 41. a drainage column; 42. a dividing strip; 43. a drainage surface; 44. a reinforcing sheet; 5. a step block; 51. and (4) water guiding surface.

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, the canned motor pump includes a pump head 1, an impeller 2, and a flow guide structure, and the flow guide structure of water flow includes a flow guide bracket 4.

The pump head 1 comprises a pump body 11 and a pump cover 12, and the pump body 11 and the drainage support 4 are integrally formed through injection molding. The pump head 1 is provided with a water passing channel 3, specifically, the water passing channel 3 comprises a mounting cavity 31 which is recessed in the top of the pump body 11 and is used for mounting the impeller 2, a drainage cavity 32 which is recessed in the bottom of the pump body 11 and a drainage channel 33 which communicates the mounting cavity 31 and the drainage cavity 32, and the pump cover 12 is fixedly connected to the bottom of the pump body 11 and seals the drainage cavity 32 by the pump cover 12.

As shown in fig. 2 and 3, the drainage support 4 is arranged in the drainage channel 33 in a penetrating manner, the middle of the bottom of the impeller 2 is provided with a water inlet, the drainage support 4 is positioned right below the center of the impeller 2, the top of the drainage support 4 extends into the installation cavity 31 and extends into the impeller 2, and the bottom of the drainage support 4 is positioned in the drainage cavity 32. The drainage support 4 comprises a drainage column 41 positioned in the middle and partition strips 42 fixedly connected to the periphery of the drainage column 41 at equal intervals, the bottom, far away from the impeller 2, of the drainage column 41 is provided with a conical drainage surface 43, the partition strips 42 are fixedly connected with the top of the drainage cavity 32 in a wall-fitting manner and have a set interval with the bottom of the drainage cavity 32 in a wall-fitting manner, and the outer ends of the partition strips 42 are fixedly connected with the side of the drainage cavity 32 in a wall-fitting manner. The inner end of the separation strip 42 is provided with a reinforcing sheet 44 which is arranged in a protruding way towards the impeller 2, the reinforcing sheet 44 is arranged along the drainage column 41, and the length direction of the reinforcing sheet 44 is parallel to the axial direction of the drainage column 41. In this embodiment, the number of the separation bars 42 is three, and in actual production, the number of the separation bars 42 may be four or five.

In this embodiment, the wall of the drainage cavity 32 has two protruding step blocks 5, the step blocks 5 face the water inlet end of the water passage 3, the two step blocks 5 are arranged in a step shape, and in actual production, the number of the step blocks 5 may be one or three. One side of the step block 5 facing the water inlet end of the water passing channel 3 is provided with an arc-shaped water guide surface 51, the water guide surface 51 is arranged in a bending mode from the middle to two sides along the direction of water flow, and corners of the step block 5 are subjected to rounding treatment.

The water flow enters the water passage 3 of the pump head 1, contacts the step block 5 firstly, is broken up and then flows to the drainage support 4, is further broken up by the drainage support 4 and flows to the impeller 2 under the guidance of the water flow.

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.

Although the terms of pump head 1, pump body 11, pump cover 12, impeller 2, water passage 3, mounting cavity 31, drainage cavity 32, drainage passage 33, drainage bracket 4, drainage column 41, separation strip 42, drainage surface 43, reinforcing sheet 44, step block 5, water guide surface 51, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a drainage structure of canned motor pump rivers, canned motor pump includes pump head (1) and impeller (2), water passing channel (3) have in pump head (1), impeller (2) set up in water passing channel (3), the centre department of impeller (2) bottom have a water inlet, its characterized in that, drainage structure is including linking firmly drainage support (4) in water passing channel (3), drainage support (4) are located impeller (2) center under.

2. The flow guide structure for shielding water flow of a pump according to claim 1, wherein the water passing channel (3) comprises a mounting cavity (31) which is concavely arranged at the top of the pump head (1) and is used for mounting the impeller (2), a drainage cavity (32) which is concavely arranged at the bottom of the pump head (1), and a drainage channel (33) which is communicated with the mounting cavity (31) and the drainage cavity (32), the drainage bracket (4) is arranged in the drainage channel (33) in a penetrating manner, the top of the drainage bracket (4) extends into the mounting cavity (31) and extends into the impeller (2), and the bottom is located in the drainage cavity (32).

3. The drainage structure for shielding water flow of a pump according to claim 2, wherein the drainage support (4) comprises a drainage column (41) located in the middle and partition strips (42) fixed to the periphery of the drainage column (41) at equal intervals, the bottom of the drainage column (41) away from the impeller (2) is provided with a drainage surface (43) in a conical surface shape, the partition strips (42) are fixedly attached to the wall of the top of the drainage cavity (32) and have a set interval with the wall of the bottom of the drainage cavity (32), and the outer ends of the partition strips (42) are fixedly attached to the wall of the side of the drainage cavity (32).

4. The pump water flow shielding drainage structure according to claim 3, wherein the inner end of the separation strip (42) is provided with a reinforcing sheet (44) which is convexly arranged towards the impeller (2), the reinforcing sheet (44) is arranged against the drainage column (41), and the length direction of the reinforcing sheet (44) is parallel to the axial direction of the drainage column (41).

5. The flow guide structure for shielding water flow of a pump according to claim 2, 3 or 4, characterized in that the wall of the flow guide cavity (32) is provided with at least one step block (5) which is convexly arranged, the step block (5) is arranged right opposite to the water inlet end of the water passage (3), and when the number of the step blocks (5) is more than or equal to two, the step blocks (5) are arranged in a step shape.

6. The pump water flow shielding drainage structure according to claim 5, wherein one side of the step block (5) facing the water inlet end of the water passage (3) is provided with an arc-shaped water guide surface (51), and the water guide surface (51) is bent from the middle to two sides along the direction of the water flow.

7. The flow directing structure for shielding water flow of a pump according to claim 5, wherein corners of the step blocks (5) are rounded.

8. The pump water flow shielding drainage structure according to claim 2, 3 or 4, wherein the pump head (1) comprises a pump body (11) and a pump cover (12), the pump cover (12) is fixedly connected to the bottom of the pump body (11) and the pump cover (12) blocks the drainage cavity (32), and the pump body (11) and the drainage support (4) are integrally formed by injection molding.