High-flow deep well pump

Abstract

This invention provides a high-flow-rate deep well pump. An impeller and a guide fluid are housed within a guide seat. The inner wall of the guide seat, the impeller, and the guide fluid form a medium flow channel. This channel extends from the impeller's outlet to the guide fluid's inlet, exhibiting a variable flow-guiding structure with a gradually narrowing and then expanding flow area. When open, a check valve forms an annular outlet cavity with the pump outlet. The flow areas of the annular outlet cavity and the guide seat are arranged to be substantially the same. By maintaining a constant flow-guiding structure in the medium flow channel connecting the impeller and the guide seat, the gradually narrowing flow area enhances the swirling ability of the water discharged from the impeller, while the expanding flow area ensures the conversion of kinetic energy into potential energy, guaranteeing the pump's lifting capacity. Simultaneously, the annular outlet cavity at the check valve location ensures that the water flow exiting the guide seat maintains a substantially constant flow area, reducing energy loss and preserving the lifting capacity.

Description

Technical Field

[0001] This invention relates to the field of deep well pump technology, and more specifically, to a high-flow-rate deep well pump. Background Technology

[0002] A deep well pump is a type of pump that integrates an electric motor and a pump unit, and is immersed in a groundwater well to draw and transport water. It is widely used in farmland irrigation and drainage, industrial and mining enterprises, urban water supply and drainage, and sewage treatment.

[0003] The deep well pump body contains a multi-stage transmission guide seat. The impeller and guide fluid within the guide seat work together to guide the water flow, which is then discharged through the pump outlet at the top of the pump body. The impeller rotation creates a swirling flow of water. A ring of rudder blades is positioned on the bottom of the guide fluid, opposite the impeller outlet. The water discharged from the impeller is guided by the rudder blades to swirl and flow into the top of the guide fluid before being discharged. For high-flow-rate deep well pumps, while the existing impeller and guide fluid pumping structure ensures swirling water delivery, it limits the kinetic energy of the water flow, making it difficult to meet the pumping requirements of high-flow-rate deep well pumps. Summary of the Invention

[0004] In view of this, the present invention provides a high-flow-rate deep well pump to meet the high-flow-rate pumping requirements of deep well pumps.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-flow-rate deep well pump includes a pump body, in which a multi-stage guide seat driven by an impeller shaft is arranged, and a pump water outlet is provided at the end of the multi-stage guide seat. A one-way valve is provided at the pump water outlet for sealing purposes.

[0007] An impeller and a guide fluid are arranged inside the guide seat. The inner wall of the guide seat and the impeller and the guide fluid form a medium flow channel. The medium flow channel extends from the outlet of the impeller to the inlet of the guide fluid, and has a variable guide structure with a flow area that first gradually shrinks and then gradually expands.

[0008] When the one-way valve is opened, it forms an annular water outlet cavity with the pump water outlet. The flow area of ​​the annular water outlet cavity and the flow guide seat are arranged to be basically the same.

[0009] Preferably, in the above-mentioned high-flow-rate deep well pump, the inner wall of the guide seat has a guide arc surface that connects the outlet to the upper end face of the guide fluid, the outer periphery of the guide fluid and the guide arc surface form an annular inlet, the flow area from the outlet of the impeller to the annular inlet is arranged to gradually decrease, and the flow area from the annular inlet to the inlet of the guide fluid is arranged to gradually increase.

[0010] Preferably, in the above-mentioned high-flow-rate deep well pump, the impeller outlet has a first flow height, the annular inlet has a second flow width, and the guide fluid inlet has a third flow height;

[0011] The second flow width / first flow height is 0.4~0.6; the second flow width / third flow height is 0.4~0.6.

[0012] Preferably, in the above-mentioned high-flow-rate deep well pump, the second flow width / first flow height is 0.5; the second flow width / third flow height is 0.5.

[0013] Preferably, in the above-mentioned high-flow deep well pump, the outlet of the impeller has a guiding angle toward the guiding arc surface of the guide seat, the lower edge of the outlet is connected to the guiding arc surface, and the upper and lower end faces of the impeller outlet are both arranged toward the guiding arc surface.

[0014] Preferably, in the above-mentioned high-flow-rate deep well pump, the one-way valve includes a plugging valve body and a valve body guide frame for guiding and supporting it, and the pump water outlet has a first water outlet part communicating with the guide seat and a second water outlet part cooperating with the plugging valve body;

[0015] The inner ring of the second water outlet has an arc-shaped flow guide surface, and the sealing valve body has an arc-shaped pressing surface that forms an annular water outlet cavity with the arc-shaped flow guide surface.

[0016] Preferably, in the above-mentioned high-flow-rate deep well pump, the valve body guide frame is mounted at the rear end of the second water outlet, a sliding rod extends from the sealing valve body, a sliding guide hole is provided on the valve body guide frame, and the sliding rod is slidably arranged in the sliding guide hole.

[0017] Preferably, in the above-mentioned high-flow deep well pump, the sealing end of the sealing valve body is provided with a valve opening push hole, the valve opening push hole extends axially into the interior of the sealing valve body, and the opening end of the valve opening push hole is arranged opposite to the first water outlet part;

[0018] The impeller shaft extends to the first water outlet, and a rubber bearing is provided at the end of the impeller shaft. The valve push hole and the rubber bearing are in contact at the end.

[0019] Preferably, in the above-mentioned high-flow deep well pump, the valve body guide includes two cross-shaped guide blades, and a cylindrical guide cylinder is provided at the middle junction of the two guide blades, and the sliding guide hole is arranged inside the cylindrical guide cylinder.

[0020] Preferably, in the above-mentioned high-flow deep well pump, the top surface of the guide fluid is provided with multiple spiral guide vanes. The guide vanes have a first-length guide vane and a second-length converging guide vane. The length of the converging guide vane is greater than the length of the guide vane. The converging guide vane and the guide vane are arranged alternately.

[0021] Preferably, in the above-mentioned high-flow deep well pump, one or more guide vanes are provided between two adjacent manifold guide vanes, and the outer rings of the guide vanes and the manifold guide vanes extend to the same outer diameter position of the guide fluid.

[0022] The present invention provides a high-flow-rate deep well pump, comprising a pump body, within which a multi-stage guide seat driven by an impeller shaft is arranged. A pump water outlet is located at the end of each guide seat, and a one-way valve is installed at the pump water outlet for sealing purposes. An impeller and a guide fluid are arranged within the guide seat. The inner wall of the guide seat, the impeller, and the guide fluid form a medium flow channel. This medium flow channel extends from the impeller's outlet to the guide fluid's inlet, exhibiting a variable flow-guiding structure with a gradually narrowing and then expanding flow area. When open, the one-way valve and the pump water outlet form an annular outlet cavity, with the annular outlet cavity and the guide seat having substantially the same flow area. The medium flow channel connecting the impeller and the guide seat within the guide seat is provided with a fixed flow-guiding structure. The gradually narrowing flow area enhances the swirling capacity of the water discharged from the impeller, while the gradually expanding structure ensures the conversion of kinetic energy into potential energy, guaranteeing the pump's lifting capacity. At the same time, the one-way valve is set with an annular outlet chamber, so that the water flow is directed out by the guide seat and the flow area of ​​the one-way valve remains basically the same, reducing energy loss and maintaining lifting capacity. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a cross-sectional view of the deep well pump flow guiding structure provided by the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the structure of a medium-sized fluid;

[0026] Figure 3 for Figure 1 A schematic diagram of the opening structure of the middle valve body;

[0027] Figure 4 for Figure 1 A schematic diagram of the valve body when closed;

[0028] Figure 5 for Figure 1 A three-dimensional cross-sectional view of the valve body end. Detailed Implementation

[0029] This invention discloses a flow guiding structure for a deep well pump, which realizes the high flow rate pumping requirements of the deep well pump; this invention also provides a deep well pump.

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1-5 The figure shows a cross-sectional view of the deep well pump flow guiding structure provided by the present invention. Figure 2 for Figure 1 Schematic diagram of the structure of a medium-sized fluid; Figure 3 for Figure 1 A schematic diagram of the opening structure of the middle valve body; Figure 4 for Figure 1 A schematic diagram of the valve body when closed; Figure 5 for Figure 1 A three-dimensional cross-sectional view of the valve body end.

[0032] The guide seat 6 of the deep well pump forms a guide cavity 60. An impeller 61 and a guide fluid 62 are arranged in the guide cavity 60. The impeller 61 is driven to rotate by the impeller shaft 103. The rotation of the impeller 61 pressurizes water into the guide cavity 60 and discharges it through the outlet at the top of the guide fluid 62.

[0033] The impeller 61 uses its rotation to drive the water flow in a rotating vortex. The water enters from the bottom of the guide seat 6, is squeezed around the impeller 61 by the guide in the middle, and simultaneously drives the water to flow upward. The guide fluid 62 is fixed in the guide seat 6. After the water flows out of the impeller 61 around the circumference, in the existing deep well pump, the guide fluid 62 is guided by the rudder blade at the lower end of the guide fluid to guide the impeller of the impeller and adjust the direction of the vortex flow. This allows the water to flow through the arc-shaped inner wall of the guide seat to the upper end of the guide fluid. Multiple guide vanes are arranged on the upper end of the guide fluid. The water entering the vortex flows upward along the guide vanes, rotates and flows upward through the guide vane inlet, and is then guided by multiple guide vanes to enter the water outlet at the top of the guide seat. Finally, it is pumped out through the water outlet pipe at the top of the deep well pump.

[0034] However, for the existing guide seat structure with rudder blades arranged at the lower end, while the rudder blades guide the water flow of the impeller 61 pump, they will also obstruct the water flow and reduce the water flow velocity, making it difficult to meet the pumping requirements of large flow deep well pumps.

[0035] This embodiment provides a high-flow deep well pump, including a pump body 1. A multi-stage guide seat 6 driven by an impeller shaft 103 is arranged inside the pump body 1. The lower end of the multi-stage guide seat 6 is supported by an inlet seat 102, and a pump water outlet 2 is provided at the top. A one-way valve is provided at the pump water outlet 2 to cooperate with its sealing.

[0036] An impeller 61 and a guide fluid 62 are installed inside the guide seat 6. The inner wall of the guide seat 6 and the impeller 61 and the guide fluid 62 form a medium flow channel. The medium flow channel extends from the outlet of the impeller 61 to the inlet of the guide fluid 62, and has a variable guide structure with the flow area gradually decreasing and then gradually expanding.

[0037] When the check valve is open, it forms an annular outlet chamber with the pump outlet. The flow area of ​​the annular outlet chamber and the guide seat 6 are arranged to be approximately the same. An unchanged guide structure is used for the medium flow channel connecting the impeller and the guide seat within the guide seat. The flow area gradually narrows to increase the swirling capacity of the water discharged from the impeller, and then gradually expands to ensure that the kinetic energy of the water is converted into potential energy, thus guaranteeing the pump's lifting capacity. Simultaneously, the annular outlet chamber at the check valve position ensures that the water flow is discharged from the guide seat, and the flow area at the check valve position remains approximately the same, reducing energy loss and maintaining the lifting capacity.

[0038] An impeller 61 and a guide body 62 are arranged inside the guide seat 6. The inner wall of the guide seat 6 has a guide arc surface 601 that guides the water flow discharged from the impeller 61 to the guide body 62. The circumferential edge of the guide body 62 and the guide arc surface 601 form an annular inlet. The lower edge of the outlet of the impeller 61 is connected to the guide arc surface 601, and the upper edge of the outlet of the impeller 61 is connected to the bottom edge of the guide body 62. A medium guiding channel is formed inside the guide seat 6, which connects the outlet of the impeller 61 to the top surface of the guide body 62 through the annular inlet.

[0039] Compared to existing impeller guide structures, the edge of the impeller 61 is connected to the guide arc surface 601 of the guide seat 6, and the lower end face of the guide body 62 is free of rudder blades. Therefore, when the impeller 61 pumps water, the pumped water flow directly impacts the guide arc surface 601 on the inner end face of the guide seat 6. After being deflected by the guide arc surface 601, the water flow is transported by the impeller 61 to the upper surface of the guide body 62. Since the water flow pumped by the impeller 61 is not blocked by rudder blades, the pumping can obtain greater pumping kinetic energy, which meets the pumping flow requirements of large-displacement deep well pumps.

[0040] The impeller 61 rotates within the guide seat 6 to pump water. The pumped water is sent into the top of the guide fluid 62 through the annular inlet and then discharged. The circumferential edge of the guide fluid 62 forms an annular inlet, and the outlet of the impeller 61 is directly opposite the annular inlet. When pumping water, the water pumped out by the impeller 61 is sprayed directly toward the annular inlet. The pumped water flows around the annular inlet and is then guided to the upper surface of the guide fluid 62. By setting the medium guide channel within the guide seat 6 to a direct swirling pumping method by the impeller 61, the pumped water can flow directly into the top surface of the guide fluid 62, reducing the energy loss of the pumped water and enabling high-flow pumping by the impeller within the guide seat.

[0041] Furthermore, from the first flow height H1 at the outlet of impeller 61 to the second flow width H2 at the annular inlet, the first flow height H1 is greater than the second flow width H2, and the flow area gradually decreases along the flow direction. The water pumped by impeller 61 has a certain kinetic energy discharged through the outlet. As the flow height gradually decreases, the water flows in a swirling motion from the first flow height H1 into the second flow width H2. This process converts the flow velocity, further increasing the velocity in the lower part of the guide arc surface 601. The swirling effect is enhanced, and the water is further compressed, passing more smoothly through the annular inlet while maintaining a high flow energy.

[0042] Furthermore, the inlet of the guide fluid 62 has a third flow height H3, and the second flow width H2 is smaller than the third flow height H3, with the flow area gradually increasing along the flow direction. Water flows into the upper part of the guide fluid 62 through the annular inlet. A diffuser-shaped medium guide channel with a gradually increasing inlet area is set at the inlet between the annular outlet and the guide fluid 62. As the cross-sectional area increases, the water velocity gradually decreases while the pressure gradually increases, converting the kinetic energy of the water into potential energy. By structurally adjusting the position of the inlet of the guide fluid 62, the stability of the conversion between kinetic and potential energy is ensured, guaranteeing that pumped water can be smoothly discharged through the guide fluid and ensuring the pump flow rate.

[0043] By directly aligning the outlet of impeller 61 with the guide arc surface 601, the water pumped by impeller 61 flows directly through the guide arc surface 601 to the upper part of guide fluid 62. Simultaneously, by forming an annular inlet between the circumference of guide fluid 62 and guide arc surface 601, the medium flow channel between the outlet of impeller 61 and the annular inlet has a gradually narrowing structure. By compressing the water flow height, the water flow velocity is further increased, enhancing the vortex energy and ensuring that the water can smoothly enter the top of guide fluid 62. At the same time, by setting a gradually expanding structure between the annular inlet and the inlet of guide fluid 62 on the top surface of the medium flow channel, the water flow is slowed down, kinetic energy is converted into potential energy, and the pumped water can smoothly enter and exit guide fluid, ensuring the stable drainage of large-flow water pumps.

[0044] Further, the ratio of the second flow width H2 to the first flow height H1 is 0.4~0.6; the ratio of the second flow width H2 to the 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 impeller 61, and the third flow height H3 is the height between the surface of the guide fluid 62 and the inner wall of the guide seat 6 at the inlet position of the guide fluid 62. By setting the second flow width H2 of the annular inlet to half of both the impeller 61 outlet and the guide fluid inlet, it is ensured that the water discharged from the impeller 61 can generate a stable vortex and be transported to the top of the guide fluid 62, while minimizing energy loss during water flow and improving the stability of the impeller guide structure.

[0045] In this embodiment, the outlet of the impeller 61 has a flow guide angle that drains water towards the flow guide arc surface 601, and both the upper and lower end surfaces of the outlet of the impeller 61 are arranged towards the flow guide arc surface 601. Since the outlet of impeller 61 and the lower surface of guide tube 62 are bladeless, a swirling flow is generated between the water flow entering through the outlet of impeller 61 and the guide arc surface 601 of guide tube 6. The swirling flow and higher flow velocity allow the water to smoothly enter the upper part of guide tube 6. The outlet of impeller 61 is arranged at an angle, and the radial extension length of the upper end face of the outlet of impeller 61 is shorter than the length of the lower end face of impeller 61, making the outlet of impeller 61 an angled outlet. The outlet of impeller 61 faces the annular inlet. To ensure that the impeller is smoothly installed into guide tube 62, the lower end face of the outlet of impeller 61 is connected to the bottom edge of guide arc surface 601, so that the water flowing out from the lower end face of impeller 61 directly enters guide arc surface 601.

[0046] The water flowing out from the upper end face of the impeller 61 mainly enters through the inner ring of the annular inlet, directing its outlet direction toward the guide arc surface 601. The outlet direction does not exceed the inner ring of the annular inlet, causing the water discharged from the outlet of the impeller 61 to tend to squeeze into the annular inlet, reducing the obstruction effect of the bottom of the guide fluid 62 on the water outlet of the impeller 61, improving the swirling effect, and ensuring smooth water flow.

[0047] As shown in the figure, the first flow width H1 can be considered as the extension of both the upper and lower surfaces of the impeller 61 outlet. The directions of these two extensions can be considered as the main outflow direction of the water. By arranging the outlet at an angle, the angle between the water flow discharged from the impeller 61 and the guide arc surface 601 is minimized, allowing the water flow to essentially adhere to the guide arc surface 601, thus reducing energy loss caused by the impact between the outlet and the guide arc surface 601.

[0048] In this embodiment, the water pumped by the impeller 61 is guided to the upper part of the guide fluid 62 via the guide seat 6, and then pumped out by the guide vanes on the guide fluid 62. For a deep well pump with multi-stage impellers 61, the interstage impellers are used to continuously accelerate the pumped water, and the interstage guide fluid sends the impeller pumped water to the next stage to continue pumping water until the top guide fluid 62 is reached and then discharged through the pump water outlet.

[0049] Multiple spiral guide vanes 620 are provided on the top surface of the guide fluid 60 to guide the water flow sent in by the swirling flow. The swirling flow is guided upward while rotating. The water flow is guided by the spiral guide vanes 620 and pumped into the guide fluid 62 through the inlet. It is discharged from the guide fluid outlet at the top of the guide fluid 62. After the water flows out, it is still in a rotating state. The water flow discharged by adjacent spiral guide vanes 620 interferes with each other. Although the guide fluid 62 generally tends to be pumped upward after it merges, it will form turbulence between them, which will affect the consistency of the water flow.

[0050] In this embodiment, the guide vane 620 is configured with a first-length guide vane 621 and a second-length converging guide vane 622, the length of which is greater than that of the guide vane 621. The converging guide vane 622 and the guide vane 621 are arranged alternately. By dividing the guide vane 620 into two groups of different lengths, both guide the water flow pumped into the impeller 61 simultaneously, maintaining the original swirling transport of the water flow. Furthermore, by setting the converging guide vane 622 and the guide vane 621 to different lengths, after the shorter guide vane 621 completes its guidance, the water flows into the longer portion of the converging guide vane 622, thus allowing for continued guidance of the water flow. This also reduces mutual interference between adjacent converging guide vanes 622 after the water flows out of the guide vanes.

[0051] Furthermore, the outer rings of the guide vane 621 and the confluence guide vane 622 extend to the same outer diameter position of the guide fluid 62. By setting the outer rings of the confluence guide vane 622 and the guide vane 621 at the same outer diameter position of the guide fluid 62, pumped water can be delivered through the circumference of the guide fluid 62 with essentially the same swirl angle and swirl velocity, ensuring the balance and stability of the pumped water energy transfer.

[0052] In a preferred embodiment, one or more guide vanes 621 may be provided between two adjacent confluence guide vanes 622. The confluence guide vanes 622 and guide vanes 621 overlap on the guide body, both guiding the water flow and maintaining a spiral flow across the upper surface of the guide body. Upon reaching the end of the guide vane 621, the pumped water is only constrained by the confluence guide vane 622, reducing mutual interference between water flows exiting the guide vane 621. The confluence guide vane 622 plays a role in stabilizing and guiding the water flow, limiting interference between adjacent confluence guide vanes 622. By dividing the guide vanes 620 on the upper surface of the guide body 62 into confluence guide vanes 622 and guide vanes 621 of different lengths, energy loss between water flows during pumping is reduced, water flow energy is increased, and pumped water flow rate is guaranteed.

[0053] The deep well pump has a water outlet structure at the end of the flow guide structure, a water outlet 2 at the tail of the pump body 1, and a sliding arrangement inside the pump body 1 for sealing or opening the water outlet 2. The water outlet 2 has a first water outlet 21 along the water inlet direction and a second water outlet 22 that cooperates with the sealing valve body 3. The second water outlet 22 has an arc-shaped flow guide surface 201, and the sealing valve body 3 has an arc-shaped pressing surface 301 that cooperates with the arc-shaped flow guide surface 201.

[0054] The first outlet section 21 connects to the inside of the pump body. Water pumped out by the impeller 6 flows through the first outlet section 21, which presses against the impeller guide. The inner diameter of the first outlet section 21 corresponds to the outlet of the impeller guide. The second outlet section 22 contains a sealing valve body 3, which obstructs the pumped water. By setting the sealing valve body 3 with an arc-shaped surface structure, and to balance the flow between the pump body and the rear drain pipe, the inner wall 201 of the second outlet section 22 is also set as an arc-shaped guide surface. With the arc-shaped pressing surface of the sealing valve body 3 facing the arc-shaped guide surface, when the pumped water impacts the sealing valve body 3, the arc-shaped structure of the sealing valve body 3 guides the water flow, reducing energy loss.

[0055] A sliding rod 32 extends from the sealing valve body 3, and a sliding guide hole 51 is provided on the valve body guide frame 5. The sliding rod 32 is slidably arranged in the sliding guide hole 51. The sealing of the pump water outlet by the sealing valve body 3 is basically along the pump body axis. Considering that the sealing valve body 3 is subjected to pump water impact during the pumping process, a valve body guide frame 5 is provided to cooperate with it. The valve body guide frame 5 is located at the rear end of the sealing valve body 3 in the sliding direction, and is slidably guided with the sealing valve body 3 by the sliding rod 32 and the sliding guide hole 51.

[0056] Specifically, the slide bar 32 is a tapered slide bar with a gradually decreasing inner diameter from the root to the tip. The sliding guide hole 51 includes an inner ring guide wall surface 511 that contacts and engages with the outer wall of the tapered slide bar, and an inner ring water passage wall surface 512 that forms a water passage channel with the outer wall of the tapered slide bar. The inner diameter of the inner ring water passage wall surface 512 is larger than the inner diameter of the inner ring guide wall surface 511.

[0057] The valve body guide 5 includes two cross-shaped guide blades 52. A cylindrical guide cylinder 53 is set at the middle junction of the two guide blades 52, and a sliding guide hole 51 is prepared inside it. That is, four or more half-width guide blades 52 can be combined with the cylindrical guide cylinder 53 to form the valve body guide 5.

[0058] It is understandable that the valve body guide 5 is supported at the outlet position of the pump body 1, and the thickness of its guide blades 52 will obstruct the water flow. Especially for the edge of the valve body guide 5, since the middle part is blocked by the valve body 3, a guide angle 54 is set at the edge of the guide blades 52. The water flow is diverted by the guide angle 54 and then impacts the guide blades 52, thereby reducing the pump water resistance.

[0059] A valve opening push hole 31 is provided at the sealing end of the sealing valve body 3. The valve opening push hole 31 extends axially into the interior of the sealing valve body 3, and the opening end of the valve opening push hole 31 is arranged opposite to the first water outlet part 21.

[0060] Impeller shaft 103 extends out of pump body outlet 2. Rubber bearing 4 is installed at the top end of impeller shaft 103. After the sealing valve body 3 seals the pump body outlet 2, the valve opening push hole 31 contacts and cooperates with the end of the rubber bearing 4, which improves the stability of the sealing structure of the sealing valve body 3 to the pump body outlet 2, avoids it from getting stuck at the pump body outlet 2, and improves the safety of the closed structure.

[0061] Based on the deep well pump flow guiding structure provided in the above embodiments, the present invention also provides a deep well pump, including a pump body 1, a pump barrel 101 is provided on the outer ring of the pump body 1, multiple sets of flow guiding structures are provided inside the pump barrel 101 and driven by an impeller shaft 103, and a closed valve body is provided at the outlet end of the pump body. The flow guiding structure provided on the deep well pump is the deep well pump flow guiding structure provided in the above embodiments.

[0062] Since this deep well pump adopts the deep well pump flow guide structure of the above embodiment, please refer to the above embodiment for the beneficial effects brought by the deep well pump flow guide structure.

[0063] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily 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 invention. Therefore, the invention is not 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 high flow deep well pump characterized by, The pump body is internally arranged with a multi-stage guide seat driven by an impeller shaft, and a pump water outlet is arranged at the end of the multi-stage guide seat, and the pump water outlet is arranged with a one-way valve matched therewith; The guide seat is internally arranged with an impeller and a guide body, and a medium flow channel is formed between the inner wall surface of the guide seat and the impeller and the guide body, the medium flow channel has a variable guide structure with a gradually tapered flow area at first and a gradually expanded flow area at last from the discharge port of the impeller to the water inlet of the guide body; The one-way valve is arranged with an annular water outlet chamber between the one-way valve and the pump water outlet when the one-way valve is opened, and the annular water outlet chamber and the flow area of the guide seat are arranged in a substantially same manner; The inner wall of the guide seat is provided with a guide arc surface communicated from the discharge port to the upper end surface of the guide body, an annular water inlet is formed between the outer periphery of the guide body and the guide arc surface, and the flow area from the discharge port of the impeller to the annular water inlet is arranged in a tapered manner, and the flow area from the annular water inlet to the water inlet of the guide body is arranged in an expanded manner; The discharge port of the impeller has a first flow height, the annular water inlet has a second flow width, and the water inlet of the guide body has a third flow height, the second flow width / first flow height is 0.4-0.6, and the second flow width / third flow height is 0.4-0.6; The one-way valve comprises a blocking valve body and a valve body guide frame guiding and supporting the blocking valve body, the pump water outlet has a first water outlet part communicated with the guide seat and a second water outlet part matched with the blocking valve body, the inner ring of the second water outlet part is provided with an arc guide surface, and the blocking valve body is provided with an arc pressing surface forming an annular water outlet chamber with the arc guide surface.

2. The high flow deep well pump of claim 1, wherein, The second flow width / first flow height is 0.5, and the second flow width / third flow height is 0.

5.

3. The high-capacity deep-well pump according to claim 1, wherein The discharge port of the impeller has a guide inclination angle towards the guide arc surface of the guide seat, the lower edge of the discharge port is arranged in abutment with the guide arc surface, and the upper end surface and the lower end surface of the discharge port of the impeller are both arranged towards the guide arc surface.

4. The high-capacity deep-well pump of claim 1, wherein The valve body guide frame is arranged at the rear end of the second water outlet part, the blocking valve body is provided with a sliding rod protruding therefrom, the valve body guide frame is provided with a sliding guide hole, and the sliding rod is slidingly arranged in the sliding guide hole.

5. The high-capacity deep-well pump of claim 1, wherein The blocking end of the blocking valve body is provided with an opening valve push hole, the opening valve push hole extends into the interior of the blocking valve body in an axial direction, and the opening end of the opening valve push hole is arranged opposite to the first water outlet part; The impeller shaft extends to the first water outlet part, and the shaft end of the impeller shaft is provided with a rubber bearing, and the opening valve push hole and the rubber bearing are in contact and matched at the end.

6. The high-capacity deep-well pump of claim 4, wherein The valve body guide frame comprises two guide frame blades intersecting with each other in a cross shape, and a cylindrical guide cylinder is arranged at the middle intersection position of the two guide frame blades, and the sliding guide hole is arranged in the cylindrical guide cylinder.

7. The high-capacity deep-well pump according to claim 3, wherein The top surface of the guide body is provided with a plurality of guide vanes of spiral structure, the guide vanes have guide vanes with a first length and flow converging vanes with a second length, the length of the flow converging vanes is greater than the length of the guide vanes, and the flow converging vanes and the guide vanes are arranged alternately.

8. The high-capacity deep-well pump of claim 7, wherein, One or more guide vanes are arranged between two adjacent said collecting vanes, the outer circle of said guide vanes and said collecting vanes extending to the same outer diameter position of said guide body.

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