WO2024082984A1

WO2024082984A1 - Deep-well pump and flow guide structure thereof

Info

Publication number: WO2024082984A1
Application number: PCT/CN2023/123504
Authority: WO
Inventors: 张群; 朱青松; 陆先高
Original assignee: 钱江集团温岭正峰动力有限公司
Priority date: 2022-10-19
Filing date: 2023-10-09
Publication date: 2024-04-25

Abstract

A flow guide structure of a deep-well pump, comprising an impeller (61) and a flow guide body (62) which are arranged in a flow guide base (6), an annular water inlet being defined between the circumferential edge of the flow guide body (62) and the inner wall of the flow guide base (6). A discharge port of the impeller (61) is arranged opposite to the annular water inlet. The flow guide base (6) is internally provided with a medium flow guide channel which converges from the discharge port to the annular water inlet and flows out via the upper end surface of the flow guide body (62).

Description

Deep well pump and its flow diversion structure

This application claims priority to the following Chinese patent applications, the entire contents of which are incorporated herein by reference.

Technical Field

The present invention relates to the technical field of deep well pumps, and more particularly to a deep well pump and a flow guide structure thereof.

Background technique

A deep well pump is a pump that integrates the motor and the pump and is immersed in a groundwater well to pump and transport water. It is widely used in farmland irrigation and drainage, industrial and mining enterprises, urban water supply and drainage, and sewage treatment.

A guide seat with multi-stage transmission is arranged in the pump body of the deep well pump. The impeller in the guide seat cooperates with the guide body to pump water and guide it, and finally discharge it through the pump outlet on the top of the pump body. The impeller rotates to output the water in the form of a vortex. A circle of rudder blades is set on the bottom of the guide body, opposite to the outlet of the impeller. The water discharged by the impeller is swirl-guided by the rudder blades and sent to the top of the guide body, and finally discharged. For deep well pumps with large flow rates, the existing pumping and water diversion structure of the impeller and the guide body ensures the swirl transportation of the water flow, but limits the transportation kinetic energy of the water flow, and it is difficult to meet the pumping needs of deep well pumps with large flow rates.

Summary of the invention

In view of this, the present invention provides a deep well pump diversion structure to meet the large flow rate water pumping demand of the deep well pump; the present invention also provides a deep well pump.

In order to achieve the above object, the present invention provides the following technical solutions:

A deep well pump diversion structure comprises an impeller and a diversion body arranged in a diversion seat, wherein a circular water inlet is formed between the circumferential edge of the diversion body and the inner wall of the diversion seat;

The discharge port of the impeller is arranged opposite to the annular water inlet, and the guide seat has a medium guide channel for converging from the discharge port to the annular water inlet and flowing out through the upper end surface of the guide body.

Preferably, in the above-mentioned deep well pump diversion structure, the inner wall of the diversion seat has a diversion arc surface connected from the discharge port to the upper end surface of the diversion body, and the lower edge of the discharge port of the impeller is arranged in contact with the diversion arc surface.

Preferably, in the above-mentioned deep well pump diversion structure, the discharge port of the impeller has a first flow height, the annular water inlet has a second flow width, the first flow height is greater than the second flow width, and the flow area of the medium diversion channel gradually decreases from the first flow height position to the second flow width position.

Preferably, in the above-mentioned deep well pump diversion structure, the water inlet of the diversion body has a third flow height, the second flow width is smaller than the third flow height, and the flow area of the medium flow channel gradually increases from the second flow width position to the third flow height position.

Preferably, in the above-mentioned deep well pump flow guiding structure, the second flow width/first flow height is 0.4-0.6; the second flow width/third flow height is 0.4-0.6.

Preferably, in the above-mentioned deep well pump guide structure, the second flow width/first flow height is 0.5; the second flow width/third flow height is 0.5.

Preferably, in the above-mentioned deep well pump diversion structure, the impeller discharge port has a diversion inclination angle toward the guide arc surface of the diversion seat, and the upper end surface and the lower end surface of the impeller discharge port are both arranged toward the guide arc surface.

Preferably, in the above-mentioned deep well pump diversion structure, the radial extension length of the upper end surface of the impeller discharge port is shorter than the length of the lower end surface of the impeller.

A deep well pump comprises a pump body, wherein a plurality of flow guide structures driven by an impeller shaft are arranged in the pump body, and the deep well pump flow guide structure as described in any one of the above items is arranged between the impeller and the flow guide body of the flow guide structure.

The deep well pump diversion structure provided by the present invention comprises an impeller and a diversion body arranged in a diversion seat, wherein an annular water inlet is formed between the circumferential edge of the diversion body and the inner wall of the diversion seat; The annular water inlets are arranged relatively, and the guide seat has a medium guide channel that converges from the discharge port to the annular water inlet and flows out through the upper end surface of the guide body. The impeller rotates in the guide seat to pump water, and the pumped water is sent to the top of the guide body through the annular water inlet and then discharged. The circumferential edge of the guide body forms an annular water inlet, and the discharge port of the impeller is directly opposite to the annular water inlet. When pumping water, the water flow pumped out by the impeller is directly sprayed toward the annular water inlet, and the pumped water converges in the circumference of the annular water inlet and then guides to the upper end surface of the guide body. By setting the medium guide channel in the guide seat as a direct swirl pumping method of the impeller, the pumped water can directly flow into the top surface of the guide body, reducing the energy loss of the pumped water, and realizing large-flow water pumping by the impeller in the guide seat.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a cross-sectional view of a deep well pump diversion structure provided by the present invention;

FIG. 2 is a schematic structural diagram of the flow guide body in FIG. 1 .

Detailed ways

The invention discloses a deep well pump diversion structure, which realizes the large flow rate water pumping demand of the deep well pump; the invention also provides a deep well pump.

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

As shown in FIG. 1 and FIG. 2 , a cross-sectional view of the flow guide structure of a deep well pump provided by the present invention is shown; FIG. 2 is a schematic structural diagram of the flow guide body in FIG. 1 .

The present embodiment provides a deep well pump diversion structure, wherein an impeller 61 and a diversion body 62 are arranged in a diversion seat 6, the inner wall of the diversion seat 6 has a diversion arc surface 601 for diverting the water flow discharged from the impeller 61 to the diversion body 62, an annular water inlet is formed between the circumferential edge of the diversion body 62 and the diversion arc surface 601, the lower edge of the discharge port of the impeller 61 is connected to the diversion arc surface 601, and the upper edge of the discharge port of the impeller 61 is connected to the bottom edge of the diversion body 62, and a medium diversion channel is formed in the diversion seat 6, which is connected from the discharge port of the impeller 61 to the top surface of the diversion body 62 through the annular water inlet.

Compared with the existing impeller guide structure, the edge of the impeller 61 is connected to the guide arc surface 601 of the guide seat 6, and the rudder blade is eliminated from the lower end surface of the guide body 62. Therefore, when the impeller 61 is pumping water, the pumped water flow directly impacts the guide arc surface 601 on the inner end surface of the guide seat 6, and is transported from the impeller 61 to the upper surface of the guide body 62 through the change of direction of the guide arc surface 601. Since the water flow pumped out by the impeller 61 is not blocked by the rudder blade, the pumping water can obtain greater pumping kinetic energy, thereby meeting the pumping flow requirement of the large-displacement deep well pump.

The impeller 61 rotates inside the guide seat 6 to pump water. The pumped water is sent into the top of the guide body 62 through the annular water inlet and then discharged. The circumferential edge of the guide body 62 forms an annular water inlet, and the discharge port of the impeller 61 is directly opposite to the annular water inlet. When pumping water, the water pumped out by the impeller 61 is directly sprayed toward the annular water inlet, and the pumped water converges in the circumference of the annular water inlet and then is guided to the upper end surface of the guide body 62. By setting the medium guide channel in the guide seat 6 to a mode in which the impeller 61 directly swirls and pumps water, the pumped water can directly flow into the top surface of the guide body 62, thereby reducing the energy loss of pumping water and realizing large-flow water pumping by the impeller in the guide seat.

Furthermore, the first flow height H1 of the discharge port of the impeller 61 is greater than the second flow width H2, and the flow area gradually decreases along the flow direction. The impeller 61 pumps water discharged through the discharge port with a certain kinetic energy of water. As the flow height gradually decreases, the water flows in a swirl from the first flow height H1 to the second flow width H2, which can be converted to further increase the flow velocity of the water flow, thereby increasing the flow velocity at the lower part of the guide arc surface 601, enhancing the swirl effect, and the water flows through the annular water inlet more smoothly after further squeezing, and maintaining a higher water flow energy.

Furthermore, the water inlet of the guide body 62 has a third flow height H3, the second flow width H2 is smaller than the third flow height H3, and the flow area gradually increases along the flow direction. Water flows through the annular water inlet and is sent to the upper part of the guide body 62. At the water inlet between the annular water outlet and the guide body 62, The medium diversion channel is set to a diffusion shape with a gradually increasing water inlet area. As the cross section increases, the water flow speed gradually decreases, while the pressure gradually increases, and the kinetic energy of the water is converted into potential energy. By adjusting the structure of the water inlet position of the diversion body 62, the conversion stability of the kinetic energy and potential energy of the water is guaranteed, and the pump water can be smoothly discharged from the diversion body, thereby ensuring the water pump flow rate.

By placing the discharge port of the impeller 61 directly opposite to the guide camber 601, the pumped water of the impeller 61 is directly redirected from the guide camber 601 to the upper part of the guide body 62. At the same time, an annular water inlet is formed between the circumference of the guide body 62 and the guide camber 601, so that the medium flow channel between the discharge port of the impeller 61 and the annular water inlet is a gradually contracting structure. By compressing the water flow height, the water flow velocity is further increased, the swirl energy is improved, and it is ensured that the water flow can smoothly enter the top of the guide body 62; at the same time, the top surface of the medium flow channel is set with a gradually expanding structure between the annular water inlet and the water inlet of the guide body 62, so that the water flow is decelerated, the kinetic energy is converted into potential energy, the pumped water can smoothly enter the guide body and be discharged, and the drainage stability of the large-flow water pump is ensured.

Furthermore, the second flow width H2/first flow height H1 is 0.4-0.6; the second flow width H2/third flow height H3 is 0.4-0.6. Preferably, H2/H1 is 0.5, and H2/H3 is 0.5. The first flow height H1 is the water outlet height of the discharge port of the impeller 61, and the third flow height H3 is the water inlet position of the guide body 62, the height between the surface of the guide body 62 and the inner wall surface of the guide seat 6, and the second flow width H2 of the annular water inlet is set to half of the discharge port of the impeller 61 and the water inlet of the guide body, which ensures that the water flow discharged by the impeller 61 can generate a stable vortex and be transported to the top of the guide body 62, while minimizing the energy loss during the water circulation process and improving the stability of the impeller guide structure.

In this embodiment, the discharge port of the impeller 61 has a diversion angle for discharging water toward the guide arc surface 601, and the upper end surface and the lower end surface of the discharge port of the impeller 61 are arranged toward the guide arc surface 601. Since there is a rudderless blade structure between the discharge port of the impeller 61 and the lower surface of the guide body 62, a swirl is generated by the diversion between the water flow entering the discharge port of the impeller 61 and the guide arc surface 601 of the guide seat 6. The swirl and the higher flow rate are used to make the water flow smoothly enter the upper part of the guide seat 6. The discharge port of the impeller 61 is set with an inclined arrangement structure. The radial extension length of the upper end surface of the discharge port of the impeller 61 is shorter than the length of the lower end surface of the impeller 61, so that the discharge port of the impeller 61 is an inclined arrangement discharge port. The direction of the discharge port of the impeller 61 is toward the annular water inlet. In order to ensure that the impeller is smoothly installed into the guide seat 62, the lower end surface of the discharge port of the impeller 61 is aligned with the guide seat 62. The bottom edges of the arc surface 601 are connected, so that the water flowing out from the lower end surface of the impeller 61 directly enters the guide arc surface 601.

The water flowing out of the upper end face of the impeller 61 mainly enters through the inner circle of the annular water inlet, and its water outlet direction is directed toward the guide arc surface 601, and the water outlet direction does not exceed the inner circle of the annular water inlet, so that the water discharged from the discharge port of the impeller 61 tends to be squeezed into the annular water inlet, reducing the flow resistance of the bottom surface of the guide body 62 on the water outlet of the impeller 61, improving the swirl effect, and ensuring the smooth inflow of water.

As shown in the figure, the first flow width H1, its guide line can be regarded as the extension line of the upper end surface and the lower end surface of the impeller 61 discharge port, and the extension direction of the two extension lines can be regarded as the main outflow direction of the water flow. By arranging the discharge port in an inclined manner, the angle between the water flow discharged from the impeller 61 and the guide arc surface 601 is minimized, and the water flow can basically adhere to the guide arc surface 601, reducing the energy loss caused by the impact between the discharge port and the guide arc surface 601.

In this embodiment, the impeller 61 pumps water and guides it to the upper part of the guide body 62 through the guide seat 6, and pumps the water out through the guide vanes on the guide body 62. For the deep well pump with multi-stage impeller 61, a multi-stage guide seat 6 for pumping water is set, the lower end is supported by the inlet seat 102, and the top has a pumping water outlet 2. The impeller shaft 103 rotates to drive the inter-stage impeller 61 to rotate continuously to pump water, and the inter-stage guide body sends the impeller pumped water to the next stage to continue pumping water until the topmost guide body 62 is discharged through the pumping water outlet 2. A one-way valve is set at the pump body outlet 2 to prevent water backflow when the pump body is not pumping water, and a rubber bearing 104 is set at the top of the impeller shaft 103 for protection to ensure the safety of pumping water.

A plurality of spiral guide vanes 620 are arranged on the top surface of the guide body 60, which guide the water flow sent in by the swirl flow, and guide the swirl flow upward while rotating. The water flow is guided by the spiral guide vanes 620, and the water is pumped in from the water inlet of the guide body 62, and discharged from the water outlet of the guide body at the top of the guide body 62. The water flow is still in a rotating state after flowing out. The water flows discharged by adjacent spiral guide vanes 620 interfere with each other, resulting in that although the guide body 62 tends to be pumped out upward as a whole after converging, turbulence will be formed between them, affecting the consistency of the water flow.

Based on the deep well pump guide structure provided in the above embodiment, the present invention further provides a deep well pump, comprising a pump body 1, the outer ring of the pump body 1 has a pump barrel 101, and a plurality of impeller shafts are arranged inside the pump barrel 101. A flow guide structure is formed, and a closed valve body is arranged at the outlet end of the pump body. The flow guide structure provided on the deep well pump is the deep well pump flow guide structure provided in the above embodiment.

Since the deep well pump adopts the deep well pump flow guiding structure of the above embodiment, please refer to the above embodiment for the beneficial effects of the deep well pump brought by the deep well pump flow guiding structure.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

A deep well pump diversion structure, characterized in that it comprises an impeller and a diversion body arranged in a diversion seat, wherein a circular water inlet is formed between the circumferential edge of the diversion body and the inner wall of the diversion seat;

The discharge port of the impeller is arranged opposite to the annular water inlet, and the guide seat has a medium guide channel for converging from the discharge port to the annular water inlet and flowing out through the upper end surface of the guide body.
The deep well pump diversion structure according to claim 1 is characterized in that the inner wall of the diversion seat has a diversion arc surface connected from the discharge port to the upper end surface of the diversion body, and the lower edge of the discharge port of the impeller is arranged in contact with the diversion arc surface.
The deep well pump diversion structure according to claim 2 is characterized in that the discharge port of the impeller has a first flow height, the annular water inlet has a second flow width, the first flow height is greater than the second flow width, and the flow area of the medium diversion channel gradually decreases from the first flow height position to the second flow width position.
The deep well pump diversion structure according to claim 3 is characterized in that the water inlet of the diversion body has a third flow height, the second flow width is smaller than the third flow height, and the flow area of the medium flow channel gradually increases from the second flow width position to the third flow height position.
The deep well pump flow guide structure according to claim 4 is characterized in that the second flow width/first flow height is 0.4-0.6; the second flow width/third flow height is 0.4-0.6.
The deep well pump guide structure according to claim 5 is characterized in that the second flow width/first flow height is 0.5; the second flow width/third flow height is 0.5.
According to the deep well pump diversion structure according to any one of claims 1 to 6, it is characterized in that the discharge port of the impeller has a diversion inclination angle toward the guide arc surface of the diversion seat, and the upper end surface and the lower end surface of the impeller discharge port are both arranged toward the guide arc surface.
The deep well pump flow guide structure according to claim 7 is characterized in that the radial extension length of the upper end surface of the impeller discharge outlet is shorter than the length of the lower end surface of the impeller.
A deep well pump comprises a pump body, wherein a plurality of flow guide structures driven by an impeller shaft are arranged in the pump body, and wherein the deep well pump flow guide structure as claimed in any one of claims 1 to 8 is arranged between the impeller and the flow guide body of the flow guide structure.