Flow guide structure and deep-well pump device with same

Abstract

The utility model discloses a diversion structure and a deep well pump device with the same, the diversion structure comprises a longitudinally arranged stainless steel pipe, a first pipe section and a second pipe section connected to the upper part of the first pipe section; the transversely-arranged stainless steel gasket comprises a first gasket part and a second gasket part connected to the periphery of the first gasket part, and a pump shaft channel allowing an external pump shaft to penetrate through is formed in the middle of the first gasket part in a penetrating mode; the plastic part is arranged between the stainless steel pipe and the stainless steel gasket and comprises a first combining part arranged in the longitudinal direction and a second combining part arranged in the transverse direction, the first combining part surrounds the inner wall of the first pipe section and is combined with the inner wall of the first pipe section, and the second combining part covers the top side of the second cushion part and is combined with the top side of the second cushion part; an impeller cavity is defined by the plastic part and the first pad part. According to the flow guide structure, the plastic part is arranged, so that the wear resistance and sand resistance of the flow guide structure are improved, and the service life of the flow guide structure is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the field of deep well pump devices, in particular to a flow diversion structure and a deep well pump device provided with the structure. Background Art

[0002] Deep well pump devices are widely used in agricultural irrigation, urban water supply and drainage, industrial and mining production, and sewage treatment. They mainly include a guide structure formed with an impeller chamber and a guide vane chamber, as well as an impeller structure arranged in the impeller chamber and a guide vane structure arranged in the guide vane chamber. After the pump is turned on, the impeller structure rotates at high speed, and the water therein rotates with the blades. Under the action of centrifugal force, the water flies away from the impeller structure and is ejected outward to the inner wall of the guide structure around the impeller chamber, and then is guided to the pump outlet through the guide vane structure. When the deep well pump device is in operation, the water pumped into the deep well pump often contains a large amount of sediment, and the guide structure of the common deep well pump is made of stainless steel as a whole. As the impeller rotates, the sediment continuously washes the inner wall of the guide structure around the impeller chamber, which easily generates friction and causes part of the guide structure around the impeller chamber to be punctured and damaged, affecting the normal use of the deep well pump. Summary of the invention

[0003] The utility model aims at the deficiencies in the prior art and provides a flow guide structure and a deep well pump device provided with the structure, comprising a stainless steel pipe, a stainless steel gasket, and a plastic part arranged between the stainless steel pipe and the stainless steel gasket, wherein: the stainless steel pipe is arranged in the longitudinal direction, comprising a first pipe section at the lower part thereof, and a second pipe section connected to the upper part of the first pipe section, a guide vane chamber for accommodating an external guide vane structure is formed inside the second pipe section; the stainless steel gasket is arranged in the transverse direction, comprising a first pad portion, and a second pad portion connected to the outer periphery of the first pad portion, a plastic part capable of being inserted through the middle of the first pad portion a pump shaft channel through which an external pump shaft can pass; the plastic component comprises a first coupling component arranged in the longitudinal direction, and a second coupling component arranged in the transverse direction, the first coupling component comprises a first coupling portion arranged around the inner wall of the first pipe segment and coupled to the inner wall of the first pipe segment, and a second coupling portion connected to the lower end of the first coupling portion, the second coupling component comprises a third coupling portion covering the top side of the second cushion portion and coupled to the top side of the second cushion portion, and a first connecting portion connected to the outer periphery of the third coupling portion, the first connecting portion is connected to the second coupling portion, and the plastic component and the first cushion portion surround and form an impeller chamber for accommodating an external impeller structure.

[0004] Preferably, the plastic component further includes a fourth combining portion covering the bottom side of the second pad portion and combined with the bottom side of the second pad portion, and the fourth combining portion is arranged around the inner circumference of the first connecting portion and connected to the inner circumference of the first connecting portion.

[0005] Preferably, a fifth combining portion is extended along the radial direction of the inner periphery of the fourth combining portion toward the axial direction thereof, and the fifth combining portion fully or partially covers the bottom side of the first cushion portion and is combined with the bottom side of the first cushion portion.

[0006] Preferably, the inner diameter of the fifth combining portion is smaller than the inner diameter of the third combining portion, and the inner diameter of the fifth combining portion is larger than the inner diameter of the pump shaft channel.

[0007] Preferably, the plastic component further comprises a sixth connecting portion which is arranged around the outer circumference of the second cushion portion and connected to the outer circumference of the second cushion portion, and the outer circumference of the sixth connecting portion is connected to the inner circumference of the first connecting portion.

[0008] Preferably, the first joint portion is provided with a reinforcing plastic portion extending radially from a side close to the first pipe section toward the first pipe section, and the first pipe section is provided with a reinforcing plastic groove radially recessed from a side close to the first joint portion toward a side away from the first joint portion, and the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove; and / or the second joint portion is provided with a reinforcing plastic portion extending axially from a side close to the first pipe section toward the first pipe section, and the first pipe section is provided with a reinforcing plastic groove axially recessed from a side close to the second joint portion toward a side away from the second joint portion, and the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove; and / or the third joint portion is provided with a reinforcing plastic portion extending axially from a side close to the second pad portion toward the second pad portion, and the second pad portion is provided with a reinforcing plastic groove axially recessed from a side close to the third joint portion toward a side away from the third joint portion, and the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove The fourth combining portion is provided with a reinforcing plastic portion axially extending from a side close to the second pad portion toward the second pad portion, and the second pad portion is provided with a reinforcing plastic groove axially recessed from a side close to the fourth combining portion toward a side away from the fourth combining portion, and the reinforcing plastic portion extends into the reinforcing plastic groove and combines with the reinforcing plastic groove; and / or the fifth combining portion is provided with a reinforcing plastic portion axially extending from a side close to the first pad portion toward the first pad portion, and the first pad portion is provided with a reinforcing plastic groove axially recessed from a side close to the fifth combining portion toward a side away from the fifth combining portion, and the reinforcing plastic portion extends into the reinforcing plastic groove and combines with the reinforcing plastic groove; and / or the sixth combining portion is provided with a reinforcing plastic portion radially extending from a side close to the second pad portion toward the second pad portion, and the second pad portion is provided with a reinforcing plastic groove radially recessed from a side close to the sixth combining portion toward a side away from the sixth combining portion, and the reinforcing plastic portion extends into the reinforcing plastic groove and combines with the reinforcing plastic groove;

[0009] Preferably, the outer diameter of the second combining portion is greater than the outer diameter of the first combining portion, and the bottom side of the first pipe section is combined with the top side of the second combining portion.

[0010] Preferably, the inner periphery of the second joint portion is arranged around the outer periphery of the first connection portion and connected to the upper part of the outer periphery of the first connection portion, and the bottom side of the second joint portion and the lower part of the outer periphery of the first connection portion surround to form a positioning groove that can be positioned and connected to the external guide vane structure.

[0011] A deep well pump device comprises a pump shaft and a plurality of impeller assemblies arranged on the pump shaft, wherein the impeller assembly comprises a flow guide structure as described above, an impeller structure arranged in an impeller chamber and a guide vane structure arranged in a guide vane chamber, the impeller structure is fixedly connected to the pump shaft and can rotate with the pump shaft, and the guide vane structure is installed between two adjacent flow guide structures.

[0012] Preferably, the guide vane structure includes a guide vane body and a positioning ring, the positioning ring includes a first ring portion extending from the top of the outer peripheral side of the guide vane body along its axial direction toward the direction away from the guide vane body, and a second ring portion extending from the top of the first ring portion along its radial direction toward the direction away from its axis. The guide vane structure is radially limited by the first ring portion between the inner wall of the second pipe segment and the lower part of the outer peripheral side of the first connecting portion, and is axially limited by the second ring portion clamped between the top side of the second pipe segment and the bottom side of the second joint portion.

[0013] The utility model provides a flow guide structure, comprising a stainless steel pipe, a stainless steel gasket, and a plastic part arranged between the stainless steel pipe and the stainless steel gasket, wherein the stainless steel pipe is arranged longitudinally, and the stainless steel gasket is arranged transversely. The stainless steel gasket comprises a first gasket portion and a second gasket portion connected to the outer periphery of the first gasket portion. The plastic part comprises a first coupling member arranged longitudinally and a second coupling member arranged transversely, wherein the first coupling member comprises a second coupling member surrounding the inner wall of the first pipe section and connected to the lower end of the first coupling member, and the second coupling member comprises a third coupling member covering the top side of the second gasket portion and combining with the top side of the second gasket portion. Since the plastic part is wear-resistant, the first pipe section can be protected by combining the first coupling member of the plastic part with the inner wall of the first pipe section of the stainless steel pipe, and the second gasket can be protected by combining the third coupling member of the plastic part with the top side of the second gasket portion of the stainless steel gasket, thereby preventing mud and sand from directly rubbing against the first pipe section and the second gasket portion of the stainless steel material after entering the interior of the flow guide structure, thereby improving the wear resistance and sand resistance of the flow guide structure, greatly extending the service life of the flow guide structure, and further extending the service life of the deep well pump device provided with the flow guide structure.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 The structure diagram of the flow guide structure of one embodiment of the utility model is shown in FIG. Figure 1 .

[0017] Figure 2 The structure diagram of the flow guide structure of one embodiment of the utility model is shown in FIG. Figure 2 .

[0018] Figure 3 A longitudinal section diagram of a flow guide structure according to an embodiment of the present invention Figure 1 .

[0019] Figure 4 A longitudinal section diagram of a flow guide structure according to an embodiment of the present invention Figure 2 .

[0020] Figure 5 It is a longitudinal sectional schematic diagram of a deep well pump device according to one embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the patent application specification and claims of the utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity limitation, but indicate the existence of at least one.

[0026] like Figure 1-5As shown, as an embodiment of the utility model, a flow guide structure is provided, comprising a stainless steel pipe 1, a stainless steel gasket 2, and a plastic part 3 arranged between the stainless steel pipe 1 and the stainless steel gasket 2, the stainless steel pipe 1 is arranged in the longitudinal direction, comprising a first pipe section 11 at the lower part thereof, and a second pipe section 12 connected to the upper part of the first pipe section 11, and a guide vane chamber 10 for accommodating an external guide vane structure is formed inside the second pipe section 12; the stainless steel gasket 2 is arranged in the transverse direction, comprising a first pad 21, and a second pad 22 connected to the outer periphery of the first pad 21, and a pump shaft channel 20 for allowing an external pump shaft to pass through is provided in the middle of the first pad 21. The plastic part 3 comprises a first combination member 31 arranged in the longitudinal direction, and a second combination member 32 arranged in the transverse direction. The first combination member 31 comprises a first combination member 311 arranged around the inner wall of the first pipe section 11 and combined with the inner wall of the first pipe section 11, and a second combination member 312 connected to the lower end of the first combination member 311. The second combination member 32 includes a third combination member 321 covering the top side of the second pad 22 and combined with the top side of the second pad 22, and a first connection member 322 connected to the outer periphery of the third combination member 321, the first connection member 322 is connected to the second combination member 312, and the plastic member 3 and the first pad 21 surround to form an impeller chamber 30 for accommodating an external impeller structure. The flow guide structure provided by the utility model includes a stainless steel pipe 1, a stainless steel gasket 2, and a plastic member 3 arranged between the stainless steel pipe 1 and the stainless steel gasket 2, the stainless steel pipe 1 is arranged longitudinally, and the stainless steel gasket 2 is arranged transversely. The stainless steel gasket 2 includes a first pad 21 and a second pad 22 connected to the outer periphery of the first pad 21. The plastic member 3 includes a first combination member 31 arranged longitudinally and a second combination member 32 arranged transversely, the first combination member 31 includes a second combination member 312 surrounding the inner wall of the first pipe section 11 and connected to the lower end of the first combination member 311, and the second combination member 32 includes a third combination member 321 covering the top side of the second pad 22 and combined with the top side of the second pad 22. Since the plastic part 3 is wear-resistant, the first pipe section 11 can be protected by combining the first joint portion 311 of the plastic part 3 with the inner wall of the first pipe section 11 of the stainless steel pipe 1, and the second pad 22 can be protected by combining the third joint portion 321 of the plastic part 3 with the top side of the second pad 22 of the stainless steel gasket 2, thereby preventing mud and sand from entering the diversion structure and directly rubbing against the first pipe section 11 and the second pad 22 of the stainless steel material to cause breakdown damage, thereby improving the wear resistance and sand resistance of the diversion structure, greatly extending the service life of the diversion structure, and thereby extending the service life of the deep well pump device provided with the diversion structure.

[0027] In this embodiment, the plastic part 3 further includes a fourth connecting portion 323 covering the bottom side of the second pad portion 22 and connecting to the bottom side of the second pad portion 22. The fourth connecting portion 323 is arranged around the inner periphery of the first connecting portion 322 and connected to the inner periphery of the first connecting portion 322. The fourth connecting portion 323 can protect the bottom surface of the second pad portion 22 from friction with mud and sand.

[0028] In this embodiment, the inner circumference of the fourth joint portion 323 is provided with a fifth joint portion 324 extending along its radial direction toward its axial direction, and the fifth joint portion 324 completely or partially covers the bottom side of the first cushion portion 21 and is combined with the bottom side of the first cushion portion 21. The fifth joint portion can protect part of the bottom surface of the first cushion portion from friction with mud and sand.

[0029] In this embodiment, the inner diameter of the fifth joint portion 324 is smaller than the inner diameter of the third joint portion 321, and the inner diameter of the fifth joint portion 324 is larger than the inner diameter of the pump shaft channel 20, and the inner diameter of the fifth joint portion 324 is larger than the inner diameter of the first cushion portion. That is, the first cushion portion 21 completely protrudes from the plastic part 3, and is not covered by the plastic part 3 above and below, and the surface of the stainless steel material is more convenient for the flow of water and sediment.

[0030] In this embodiment, the plastic part 3 further includes a sixth connecting portion 325 arranged around the outer circumference of the second pad portion 22 and connected to the outer circumference of the second pad portion 22, and the outer circumference of the sixth connecting portion 325 is connected to the inner circumference of the first connecting portion 322. The sixth connecting portion 325 is arranged between the third connecting portion 321 and the fourth connecting portion 323, and encloses the second pad portion 22 together with the third connecting portion 321 and the fourth connecting portion 323.

[0031] In this embodiment, the top surface of the third joint portion 321 is smoothly connected to the top surface of the first connection portion 322, which can prevent water flow and sediment from accumulating as the impeller rotates, thereby preventing the impeller structure 5 from rotating. The surface formed by the top surface of the third joint portion 321 and the top surface of the first connection portion 322 gradually descends from the stainless steel pipe 1 to the pump shaft channel 20, which conforms to the state in which the outer layer of water flow gradually rises when the water flow rotates, and can facilitate the water flow to rotate with the guide vane structure 6 and the impeller structure 5. The bottom surface of the fourth joint portion 323 is smoothly connected to the bottom surface of the first connection portion 322, which can prevent water flow and sediment from accumulating as the impeller rotates, thereby preventing the guide vane structure 6 from rotating. The bottom surface of the fifth joint portion 324 is smoothly connected to the bottom surface of the fourth joint portion 323, which can prevent water flow and sediment from accumulating as the impeller rotates, thereby preventing the guide vane structure 6 from rotating.

[0032] In this embodiment, a reinforcing plastic portion 313 is provided on the first joint portion 311 and extends radially from a side close to the first pipe segment 11 toward the first pipe segment 11. A reinforcing plastic groove 110 is provided on the first pipe segment 11 and is radially recessed from a side close to the first joint portion 311 toward a side away from the first joint portion 311. The reinforcing plastic portion 313 extends into the reinforcing plastic groove 110 and is combined with the reinforcing plastic groove 110. In other embodiments, a reinforcing plastic portion axially extending from a side close to the first pipe segment 11 toward the first pipe segment 11 may be provided on the second joint portion 312, a reinforcing plastic groove 110 axially recessed from a side close to the second joint portion 312 toward a side away from the second joint portion 312 may be provided on the first pipe segment 11, and the reinforcing plastic portion 313 extends into the reinforcing plastic groove 110 and is combined with the reinforcing plastic groove; or a reinforcing plastic portion axially extending from a side close to the second pad 22 toward the second pad 22 may be provided on the third joint portion 321, a reinforcing plastic groove axially recessed from a side close to the third joint portion 321 toward a side away from the third joint portion 321 may be provided on the second pad 22, and the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove; or a reinforcing plastic portion axially extending from a side close to the second pad 22 toward the second pad 22 may be provided on the fourth joint portion 323, and A reinforcing plastic groove is provided on the pad 22, which is axially recessed from the side close to the fourth joint portion 323 to the side away from the fourth joint portion 323, and the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove; or a reinforcing plastic portion is provided on the fifth joint portion 324, which extends axially from the side close to the first pad 21 to the first pad 21, and a reinforcing plastic groove is provided on the first pad 21, which is axially recessed from the side close to the fifth joint portion 324 to the side away from the fifth joint portion 324, and the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove; or a reinforcing plastic portion is provided on the sixth joint portion 325, which radially extends from the side close to the second pad 22 to the second pad 22, and a reinforcing plastic groove is provided on the second pad 22, which is radially recessed from the side close to the sixth joint portion 325 to the side away from the sixth joint portion 325, and the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove. The connection between the reinforced injection molding part and the reinforced plastic groove is a fixed connection. The provision of the reinforced injection molding part and the reinforced plastic groove can further strengthen the stability of the connection between the plastic part 3 and the stainless steel pipe 1 and the stainless steel gasket 2, and limit the relative displacement between the stainless steel pipe 1 and the plastic part 2. The outer diameter of the free end of the reinforced injection molding part is equal to the outer diameter of the first pipe section 11, and the transverse length of the reinforced injection molding part is equal to the transverse length of the reinforced plastic groove, so as to avoid a gap between the reinforced injection molding part and the reinforced plastic groove that is easy to hide mud and sand.

[0033] In this embodiment, the outer diameter of the second combining portion 312 is greater than the outer diameter of the first combining portion 311 and is equal to the outer diameter of the first pipe segment 11. The bottom side of the first pipe segment 11 is combined with the top side of the second combining portion 312. The second combining portion 312 can protect the bottom of the first pipe segment 11 from friction.

[0034] In this embodiment, the inner circumference of the second joint portion 312 is arranged around the outer circumference of the first connection portion 322 and connected to the upper part of the outer circumference of the first connection portion 322. The bottom side of the second joint portion 312 and the lower part of the outer circumference of the first connection portion 322 surround to form a positioning groove 310 that can be positioned and connected with the external guide vane structure. The positioning groove 310 surrounded by the second joint portion 312 and the first connection portion 322 can avoid direct contact between the metal parts when the guide joint and the guide vane structure are assembled, thereby preventing friction loss.

[0035] In this embodiment, the plastic part 3 is a reinforced plastic part to further improve the wear resistance and sand resistance of the guide structure, and further extend the service life of the guide structure. Optionally, the plastic part 3 is formed by injection molding with a 1:2 high-flow transparent PC and reinforced PC and a stainless steel pipe 1 and a stainless steel gasket 2, so that the plastic part 2 is processed into a whole with the stainless steel pipe 1 and the stainless steel gasket 2, and the connection is stable and reliable, which is particularly suitable for high-speed deep well pumps.

[0036] like Figure 5 As shown, as another embodiment of the utility model, a deep well pump device is also disclosed, including a pump shaft 4, a plurality of impeller assemblies arranged on the pump shaft, the impeller assembly including the guide structure described above, and the impeller structure 5 arranged in the impeller chamber 30 and the guide vane structure 6 arranged in the guide vane chamber 10, the impeller structure is fixedly connected relative to the pump shaft and can rotate with the pump shaft, and the guide vane structure 6 is installed between two adjacent guide structures. The deep well pump device of this embodiment adopts the guide structure provided by the utility model, and therefore, it also has good wear resistance and sand resistance, thereby extending the service life of the deep well pump device.

[0037] like Figure 5 As shown, in other embodiments, the guide vane structure 6 includes a guide vane body 61 and a positioning ring 62, the positioning ring 62 includes a first ring portion 621 extending from the top of the outer peripheral side of the guide vane body along its axial direction toward the direction away from the guide vane body, and a second ring portion 622 extending from the top of the first ring portion 621 along its radial direction toward the direction away from its axis. The guide vane structure is radially limited by the first ring portion 621 between the inner wall of the second pipe segment 12 and the lower portion of the outer peripheral side of the first connecting portion 322, and is axially limited by the second ring portion 622 clamped between the top side of the second pipe segment 12 and the bottom side of the second joint portion 312.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the utility model.

[0039] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. A flow guide structure, characterized in that: The invention comprises a stainless steel pipe, a stainless steel gasket and a plastic part arranged between the stainless steel pipe and the stainless steel gasket, which are combined into an integral structure, wherein: The stainless steel pipe is arranged in the longitudinal direction, and includes a first pipe section at the lower part thereof, and a second pipe section connected to the upper part of the first pipe section, wherein a guide vane chamber for accommodating an external guide vane structure is formed inside the second pipe section; The stainless steel gasket is arranged in the transverse direction and comprises a first gasket portion and a second gasket portion connected to the outer periphery of the first gasket portion, wherein a pump shaft passage is provided through the middle of the first gasket portion and can allow an external pump shaft to pass through; The plastic component includes a first combining component arranged in the longitudinal direction and a second combining component arranged in the transverse direction, the first combining component includes a first combining portion arranged around the inner wall of the first pipe segment and combined with the inner wall of the first pipe segment, and a second combining portion connected to the lower end of the first combining portion, the second combining component includes a third combining portion covering the top side of the second cushion portion and combined with the top side of the second cushion portion, and a first connecting portion connected to the outer periphery of the third combining portion, the first connecting portion is connected to the second connecting portion, and the plastic component and the first cushion portion surround to form an impeller chamber for accommodating an external impeller structure.

2. The flow guiding structure according to claim 1, characterized in that: The plastic part further includes a fourth combining portion covering the bottom side of the second cushion portion and combined with the bottom side of the second cushion portion, wherein the fourth combining portion is arranged around the inner circumference of the first connecting portion and connected to the inner circumference of the first connecting portion.

3. The flow guiding structure according to claim 2, characterized in that: A fifth combining portion is extended along the radial direction of the inner periphery of the fourth combining portion toward the axial direction thereof, and the fifth combining portion completely or partially covers the bottom side of the first cushion portion and is combined with the bottom side of the first cushion portion.

4. The flow guiding structure according to claim 3, characterized in that: The inner diameter of the fifth combining portion is smaller than the inner diameter of the third combining portion, and the inner diameter of the fifth combining portion is larger than the inner diameter of the pump shaft channel.

5. The flow guiding structure according to claim 4, characterized in that: The plastic part further includes a sixth connecting portion which is arranged around the outer circumference of the second cushion portion and connected to the outer circumference of the second cushion portion, and the outer circumference of the sixth connecting portion is connected to the inner circumference of the first connecting portion.

6. The flow guiding structure according to claim 5, characterized in that: The first joint portion is provided with a reinforcing plastic portion extending radially from a side close to the first pipe section toward the first pipe section, and the first pipe section is provided with a reinforcing plastic groove radially recessed from a side close to the first joint portion toward a side away from the first joint portion, and the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove; And / or the second joint portion is provided with a reinforcing plastic portion extending axially from a side close to the first pipe segment toward the first pipe segment, the first pipe segment is provided with a reinforcing plastic groove axially recessed from a side close to the second joint portion toward a side away from the second joint portion, the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove; And / or the third combining portion is provided with a reinforcing plastic portion extending axially from a side close to the second pad portion toward the second pad portion, the second pad portion is provided with a reinforcing plastic groove axially recessed from a side close to the third combining portion toward a side away from the third combining portion, the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove; And / or the fourth joint portion is provided with a reinforcing plastic portion extending axially from a side close to the second pad portion toward the second pad portion, the second pad portion is provided with a reinforcing plastic groove axially recessed from a side close to the fourth joint portion toward a side away from the fourth joint portion, the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove; And / or the fifth joint portion is provided with a reinforcing plastic portion extending axially from a side close to the first pad portion toward the first pad portion, the first pad portion is provided with a reinforcing plastic groove axially recessed from a side close to the fifth joint portion toward a side away from the fifth joint portion, the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove; And / or the sixth joint portion is provided with a reinforcing plastic portion extending radially from a side close to the second pad portion toward the second pad portion, and the second pad portion is provided with a reinforcing plastic groove radially recessed from a side close to the sixth joint portion toward a side away from the sixth joint portion, and the reinforcing plastic portion extends into the reinforcing plastic groove and is combined with the reinforcing plastic groove.

7. The flow guiding structure according to any one of claims 1 to 6, characterized in that: The outer diameter of the second combining portion is greater than the outer diameter of the first combining portion, and the bottom side of the first pipe section is combined with the top side of the second combining portion.

8. The flow guiding structure according to claim 7, characterized in that: The inner periphery of the second joint portion is arranged around the outer periphery of the first connection portion and connected to the upper part of the outer periphery of the first connection portion. The bottom side of the second joint portion and the lower part of the outer periphery of the first connection portion surround to form a positioning groove that can be positioned and connected to the external guide vane structure.

9. A deep well pump device, characterized in that: It includes a pump shaft and a plurality of impeller assemblies arranged on the pump shaft, wherein the impeller assembly includes a guide structure as described in any one of claims 1 to 8, an impeller structure arranged in an impeller chamber, and a guide vane structure arranged in a guide vane chamber, wherein the impeller structure is fixedly connected to the pump shaft and can rotate with the pump shaft, and the guide vane structure is installed between two adjacent guide structures.

10. The deep well pump device according to claim 9, characterized in that: The guide vane structure includes a guide vane body and a positioning ring, wherein the positioning ring includes a first ring portion extending from the top of the outer peripheral side of the guide vane body along its axial direction toward a direction away from the guide vane body, and a second ring portion extending from the top of the first ring portion along its radial direction toward a direction away from its axis. The guide vane structure is radially limited by the first ring portion between the inner wall of the second pipe segment and the lower part of the outer peripheral side of the first connecting portion, and is axially limited by the second ring portion clamped between the top side of the second pipe segment and the bottom side of the second joint portion.

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