Efficient and portable submersible pump structure for well

Abstract

The utility model discloses an efficient portable well submersible pump structure which comprises a pump body and a pump shaft arranged in the pump body in a penetrating mode, a water outlet section and a water inlet section are arranged on the two sides of the pump body respectively, a plurality of water pump single bodies are connected to the pump shaft in series in the length direction, and each water pump single body comprises an impeller, a guide vane body and a volute which are sequentially connected in series. Due to the straight edge bending design of the impeller blades, the axial force is reduced, the manufacturing efficiency is improved, the manufacturing cost is reduced, the welding strength is enhanced, and the impeller blades are stable and free of deformation and unsoldering; the inner side end of the front guide plate of the guide vane body is annularly arranged and is fixedly clamped with the stop shaft sleeve, the axial force bearing capacity of the volute and the guide vane body is enhanced, the water inlet guide design is omitted, deformation under large flow is avoided, the manufacturing efficiency is improved, and the manufacturing cost is reduced. The improved impeller and volute structure is simple, stable and reliable in design; a top section volute single stop structure is omitted, the pump efficiency is high, and the service life of the pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of well pumps, in particular to a high-efficiency and portable submersible pump structure for a well. Background Art

[0002] In a large-lift well submersible pump, the impeller is subjected to a large radial force and the volute is subjected to a large axial force. Figure 1 As shown, the impeller blades of the original large-lift well submersible pump structure are twisted blades. The impeller with a twisted blade structure is cumbersome to manufacture and has a complex structure. Once the manufacturing welding dimensions are inaccurate, the welds are easy to fall apart, which will cause the welding parts of the impeller blades and the impeller body to fall off; the volute of the original large-lift well submersible pump structure is manufactured in an integral semi-welded manner. Once there is an error in the accuracy and the strength is insufficient, the buckle welding parts of the guide vanes and the volute body are easy to fall off and crack; the single stop position cannot control the ideal operating height of the impeller during long-term operation; the impeller and the screw fastening force points are insufficient, the torque is too small, etc., which seriously damage the pump structure and shorten the service life of the well submersible pump. Utility Model Content

[0003] In order to solve the above technical problems, the utility model designs a high-efficiency and lightweight submersible pump structure for wells.

[0004] The utility model adopts the following technical solutions:

[0005] A high-efficiency and lightweight well submersible pump structure includes a pump body and a pump shaft passing through the pump body. A water outlet section and a water inlet section are respectively provided on both sides of the pump body. A plurality of water pump units are connected in series along the length direction of the pump shaft. Each water pump unit includes an impeller, a guide vane body and a volute connected in series in sequence. The impeller includes an impeller front cover plate, impeller blades and an impeller rear cover plate. The impeller front cover plate, impeller blades and impeller rear cover plate are fixed by welding. The guide vane body includes a front guide plate, a guide vane and a rear guide plate. The front guide plate, guide vane and rear guide plate are fixed by welding, the rear guide plate and the volute are welded and fixed as a whole, the impeller is connected to the pump shaft through a tapered sleeve, the tail end of the tapered sleeve is threadedly connected with a stop nut, the impeller is fastened to the tapered sleeve, the guide vane body is connected to the pump shaft through the stop sleeve, the straight edges of the upper and lower ends of the impeller blades are bent and welded to the impeller rear cover plate and the impeller front cover plate respectively, the inner end of the front guide plate is annular and fixed with the stop sleeve.

[0006] Preferably, a skeleton sealing ring is connected between the impeller and the volute.

[0007] Preferably, an arched fixing plate is sleeved on the conical sleeve between the impeller rear cover and the stop nut.

[0008] Preferably, the straight edges at the upper and lower ends of the guide vane are bent and welded to the rear guide plate and the front guide plate respectively.

[0009] Preferably, the stop nut is a stainless steel nut.

[0010] The beneficial effects of the present invention are as follows: the straight-edge curved design of the impeller blades of the present invention reduces axial force, improves manufacturing efficiency, reduces manufacturing cost, enhances welding strength, and the impeller blades are stable and do not deform or become desoldered; the inner end of the front guide plate of the guide vane body is annularly arranged, which is fixed with the stop sleeve, thereby enhancing the ability of the volute and the guide vane body to withstand axial force, cancels the water inlet guide design to avoid deformation under large flow, improves manufacturing efficiency, and reduces manufacturing cost; the improved impeller and volute structure design is simple, stable and reliable; the single stop structure of the top section volute is cancelled, the pump efficiency is high, and its service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural diagram of the original large-lift well pump structure;

[0012] Figure 2 It is a structural schematic diagram of the utility model;

[0013] In the figure: 1. Pump body, 2. Water inlet section, 3. Water outlet section, 4. Pump shaft, 5. Impeller front cover, 6. Impeller blades, 7. Impeller rear cover, 8. Front guide plate, 9. Guide vane, 10. Rear guide plate, 11. Volute, 12. Skeleton sealing ring, 13. Tapered sleeve, 14. Arched fixing plate, 15. Stop nut, 16. Stop sleeve. DETAILED DESCRIPTION

[0014] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0015] Example: Figure 2 As shown, a high-efficiency and portable submersible pump structure for wells includes a pump body 1 and a pump shaft 4 passing through the pump body. A water outlet section 3 and a water inlet section 2 are respectively provided on both sides of the pump body. A plurality of water pump units are connected in series along the length direction of the pump shaft. Each water pump unit includes an impeller, a guide vane body and a volute 11 connected in series in sequence. The impeller includes an impeller front cover plate 5, impeller blades 6 and an impeller rear cover plate 7. The impeller front cover plate, impeller blades and impeller rear cover plate are fixed by welding. The guide vane body includes a front guide plate 8, a guide vane 9 and a rear The guide plate 10, the front guide plate, the guide vane and the rear guide plate are fixed by welding, the rear guide plate and the volute are welded and fixed as a whole, the impeller is sleeved on the pump shaft through a tapered sleeve 13, the tail end of the tapered sleeve is threadedly connected with a stop nut 15, the impeller is fastened to the tapered sleeve, the guide vane body is sleeved on the pump shaft through a stop sleeve 16, the straight edges of the upper and lower ends of the impeller blades are bent and welded to the impeller rear cover plate and the impeller front cover plate respectively, the inner end of the front guide plate is set in an annular shape and is fixed with the stop sleeve.

[0016] A skeleton sealing ring 12 is connected between the impeller and the volute. An arched fixing plate 14 is sleeved on the conical sleeve between the impeller rear cover and the stop nut.

[0017] The straight edges at the upper and lower ends of the guide vane are bent and welded to the rear guide plate and the front guide plate respectively. The stop nut is a stainless steel nut.

[0018] In the utility model, the water flow of the large-lift deep-well pump enters the water inlet of the impeller from the water inlet section at the lower end. The straight-edge curved impeller blades are laser-welded to the impeller rear cover plate and the impeller front cover plate to increase the welding strength and eliminate the twisted space guide vane structure. The impeller is changed to a straight-edge blade, and the impeller height is reduced so that the impeller can withstand a greater upward force. An arched fixing plate is added to the upper end of the impeller to increase the force-bearing area so that the impeller and the tapered shaft sleeve can withstand a greater torque. The inner end of the front guide plate is annular and is fixed with the stop shaft sleeve, so that the volute and the guide vane body can withstand a greater axial force. A skeleton sealing ring design is used between the impeller and the volute, which has a good sealing effect, high pump efficiency, good stability and simple installation. A stop structure is added to the bottom end, which is composed of a stainless steel nut and high-hardness rubber. The number of stops is increased according to the number of pump stages to extend its service life.

[0019] The embodiment described above is only a preferred solution of the present invention and does not limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A high-efficiency and lightweight submersible pump structure for wells, comprising a pump body and a pump shaft passing through the pump body, a water outlet section and a water inlet section being provided on both sides of the pump body, a plurality of water pump units connected in series along the length direction of the pump shaft, each water pump unit comprising an impeller, a guide vane body and a volute connected in series in sequence, the impeller comprising an impeller front cover plate, impeller blades and an impeller rear cover plate, the impeller front cover plate, impeller blades and impeller rear cover plate being fixed by welding, the guide vane body comprising a front guide plate, guide vanes and a rear guide plate, the front guide plate, guide vanes and rear guide plate being fixed by welding, and characterized in that: The rear guide plate and the volute are welded and fixed as a whole, the impeller is connected to the pump shaft through a tapered sleeve, the tail end of the tapered sleeve is threadedly connected with a stop nut, and the impeller is fastened to the tapered sleeve, and the guide vane body is connected to the pump shaft through the stop sleeve. The straight edges of the upper and lower ends of the impeller blades are bent and welded to the impeller rear cover plate and the impeller front cover plate respectively. The inner end of the front guide plate is annular and is fixed with the stop sleeve.

2. The high-efficiency and portable submersible pump structure for wells according to claim 1 is characterized in that: A skeleton sealing ring is connected between the impeller and the volute.

3. The high-efficiency and portable submersible pump structure for wells according to claim 1 is characterized in that: An arched fixing plate is sleeved on the conical shaft sleeve and is located between the impeller rear cover plate and the stop nut.

4. The high-efficiency and portable submersible pump structure for wells according to claim 1 is characterized in that: The straight edges at the upper and lower ends of the guide vane are bent and welded to the rear guide plate and the front guide plate respectively.

5. The high-efficiency and portable submersible pump structure for wells according to claim 1 is characterized in that: The stop nut is a stainless steel nut.

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