Wide-span pumps for sand control environments

Abstract

This invention provides a wide-range pump for sand control environments. The pump shaft, from one end to the other, is sequentially fitted with a lower pump head bearing bracket, several first movable mechanisms, several second movable mechanisms, several first movable mechanisms, an isolation sleeve, a pump stop ring, and an upper pump head bearing bracket. The end of the pump shaft closest to the lower pump head bearing bracket is the inlet end, and the end of the pump shaft closest to the upper pump head bearing bracket is the outlet end. The outlet end of the pump shaft is externally connected to the rotating shaft of a motor. This wide-range pump for sand control environments adopts a modular design, enabling it to be used in sand control environments and replace combined sand control pumps. It features a bearing-stage guide shell mechanism, allowing for automatic flow adjustment to adapt to different flow environments, thus improving the pump's versatility. Because of its modular design, it is easy to install, and if any parts are damaged, they can be easily replaced, facilitating repair.

Description

Technical Field

[0001] This invention belongs to the field of submersible pump technology, and in particular relates to a wide-width pump for use in sand-proof environments. Background Technology

[0002] In existing classic fully floating pumps, submersible pumps cannot effectively balance the upper and lower thrust forces, resulting in the pump operating only within a relatively narrow range. Compactor pumps solve the problem of balancing the lower thrust force, expanding the flow range in the small flow range. However, there is no reliable design to effectively balance the upward axial force in the large flow range, which significantly shortens the pump's service life when operating at high displacement. To meet the market's demand for wide-range operation, we have designed a new submersible pump. The new submersible pump still has a very simple structure and is easy to repair. Summary of the Invention

[0003] In view of this, the present invention aims to propose a wide-range pump for sand-proof environments to solve the problem that existing submersible pumps cannot handle wide-range operation, resulting in short service life.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A wide-span pump for sand control environments includes an upper pump head bearing bracket, a lower pump head bearing bracket, a pump shaft, a first movable mechanism, a second movable mechanism, a pump stop ring, an isolation sleeve, and a pump housing. The pump shaft is sequentially fitted with a lower pump head bearing bracket, several first movable mechanisms, several second movable mechanisms, several first movable mechanisms, an isolation sleeve, a pump stop ring, and an upper pump head bearing bracket from one end to the other. The end of the pump shaft closest to the lower pump head bearing bracket is the inlet end, and the end of the pump shaft closest to the upper pump head bearing bracket is the outlet end. The outlet end of the pump shaft is connected to the rotating shaft of the motor. The pump housing is fitted onto the outer walls of the first and second movable mechanisms and is located between the lower and upper pump head bearing brackets.

[0006] The second movable mechanism includes a short-handled impeller, a bearing-stage guide shell mechanism, a third guide ring, and a fourth guide ring. The short-handled impeller and the third guide ring are similar to a hollow frustum structure, and the fourth guide ring is similar to a hollow cylinder structure. The short-handled impeller and the bearing-stage guide shell mechanism are sequentially sleeved onto the pump shaft, and the short-handled impeller and the bearing-stage guide shell mechanism are overlapped. The short-handled impeller is located on one side of the inlet end. The third guide ring is installed on the outer side of the short-handled impeller, and the fourth guide ring is installed on the outer side of the bearing-stage guide shell mechanism. The third guide ring is located inside the fourth guide ring, and the third guide ring and the fourth guide ring of the two adjacent sets of the second movable mechanism are engaged.

[0007] Furthermore, the first movable mechanism includes an impeller, a guide shell, a first guide ring, a second guide ring, a first ring, and a second ring. The first guide ring, the guide shell, and the impeller are all similar to a hollow frustum structure, and the second guide ring is similar to a hollow cylinder structure. The guide shell is sleeved onto the outer outlet end of the impeller. The impeller and the guide shell are overlapped. The second ring is installed at the outlet end of the impeller. The inlet end of the guide shell is provided with a second limiting groove that engages with the second ring. The first guide ring is installed on the outer side of the impeller, and the second guide ring is installed on the outer side of the guide shell. The first guide ring is located inside the second guide ring. The inlet end of the outer wall of the first guide ring is provided with a first limiting groove. The inner wall of the second guide ring is installed with the first ring, and the first ring is located on one side of the outlet end. The first guide rings and second guide rings of two adjacent sets of the first movable mechanism are engaged. The first guide ring of the first movable mechanism is engaged with the fourth guide ring of an adjacent set of the second movable mechanism. The second guide ring of the first movable mechanism is engaged with the third guide ring of an adjacent set of the second movable mechanism.

[0008] Furthermore, the bearing-stage guide housing mechanism includes a bearing-stage guide housing, a first bearing sleeve, a second bearing sleeve, a first bearing shell, a second bearing shell, and a limiting block. The first bearing sleeve, the second bearing sleeve, the first bearing shell, and the second bearing shell are all hollow cylindrical structures. The bearing-stage guide housing is similar to a hollow frustum structure. The first bearing sleeve and the second bearing sleeve are sequentially fitted onto the pump shaft at the outlet end of the short-handled impeller. The first bearing shell is fitted onto the outside of the first bearing sleeve, and the second bearing shell is fitted onto the outside of the second bearing sleeve. The inlet end and outlet end of the inner wall of the bearing-stage guide housing are respectively fitted onto the outside of the first bearing shell and the outside of the second bearing shell. A limiting block is installed at the center of the inner wall of the bearing-stage guide housing, and the limiting block is located between the first bearing shell and the second bearing shell. The bearing-stage guide housing is also located at the outlet end of the short-handled impeller.

[0009] Furthermore, a third gap is provided between the first bearing sleeve and the second bearing sleeve, a fifth limiting groove is provided at the outlet end on the outer side of the first bearing sleeve, a sixth limiting groove is provided at the inlet end on the outer side of the second bearing sleeve, the first bearing bush is located inside the fifth limiting groove and has a first gap with the inner wall of the fifth limiting groove, the second bearing bush is located in the sixth limiting groove and has a second gap with the inner wall of the sixth limiting groove, and the third gap, the fifth limiting groove and the sixth limiting groove form a keyway.

[0010] Furthermore, the second moving mechanism also includes a fourth ring, with the fourth ring installed at the outlet end of the short impeller and a fourth limiting groove that engages with the fourth ring at the inlet end of the bearing stage guide housing.

[0011] Furthermore, the second active mechanism also includes a third ring, the third ring is installed on the inner wall of the fourth guide ring, the third ring is located on one side of the outlet end, and the inlet end of the third guide ring is provided with a third limiting groove.

[0012] Furthermore, the first limiting groove, the second limiting groove, the third limiting groove, the fourth limiting groove, the fifth limiting groove, and the sixth limiting groove are all annular grooves.

[0013] Furthermore, the lower pump head bearing bracket is connected to the inlet end of the pump shaft via a first bearing, and the upper pump head bearing bracket is connected to the outlet end of the pump shaft via a second bearing.

[0014] Compared with existing technologies, the wide-range pump for sand control environments described in this invention has the following advantages:

[0015] (1) The wide-span pump for sand control environment described in this invention adopts a modular design, can be used in sand control environment, can replace sand control combination pump, and is equipped with a bearing-level guide shell mechanism, which can automatically adjust the flow rate to adapt to different flow environment, thereby improving the versatility and service life of the pump. Because of the modular design, it is easy to install, and if any part is damaged, it is easy to directly replace the parts, thus achieving the purpose of convenient repair.

[0016] (2) The wide-width pump for sand control environment described in this invention has an impeller and guide shell for diverting flow, a short-handled impeller and bearing-grade guide shell for diverting flow, and a limiting block for separating the first bearing and the second bearing, as well as for pushing the first bearing and the second bearing. The keyway allows the bearing-grade guide shell, the first bearing and the second bearing to move horizontally inside it, thereby achieving the effect of automatically adjusting the flow rate and improving the service life. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 This is a cross-sectional view of the wide-span pump for sand-proof environments described in an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional view showing the connection relationship between the first movable mechanism and the pump shaft according to an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view showing the connection relationship between the second movable mechanism and the pump shaft according to an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Upper pump head bearing bracket; 2-Lower pump head bearing bracket; 3-Pump shaft; 4-First movable mechanism; 41-Impeller; 42-Guide housing; 43-First guide ring; 44-Second guide ring; 45-First limiting groove; 46-First ring; 47-Second ring; 48-Second limiting groove; 5-Second movable mechanism; 51-Short handle impeller; 52-Bearing-level guide housing mechanism; 521-Bearing-level guide housing; 522-First bearing sleeve; 523-Second bearing sleeve; 524-First bearing shell; 525-Second bearing shell; 526-Fourth limiting groove; 527-Limiting block; 53-Third guide ring; 54-Fourth guide ring; 55-Third limiting groove; 56-Third ring; 57-Fourth ring; 6-Pump stop ring; 7-Isolation sleeve; 8-Pump casing. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figure 1-3As shown, the wide-span pump for sand control environments includes: an upper pump head bearing bracket 1, a lower pump head bearing bracket 2, a pump shaft 3, a first movable mechanism 4, a second movable mechanism 5, a pump stop ring 6, an isolation sleeve 7, and a pump housing 8. From one end to the other, the pump shaft 3 is sequentially fitted with a lower pump head bearing bracket 2, several first movable mechanisms 4, several second movable mechanisms 5, several first movable mechanisms 4, an isolation sleeve 7, a pump stop ring 6, and an upper pump head bearing bracket 1, with the pump shaft 3 close to the lower pump head bearing bracket 2. One end is the inlet end, and the end of the pump shaft 3 near the upper pump head bearing bracket 1 is the outlet end. The outlet end of the pump shaft 3 is connected to the rotating shaft of the motor, and the motor is used to drive the pump shaft 3. The pump housing 8 is sleeved on the outer wall of the first movable mechanism 4 and the second movable mechanism 5, and is located between the lower pump head bearing bracket 2 and the upper pump head bearing bracket 1. The pump housing 8 plays a protective role. The pump shaft 3 is used to drive the upper pump head bearing bracket 1, the lower pump head bearing bracket 2, the first movable mechanism 4, the second movable mechanism 5, the pump stop ring 6 and the isolation sleeve 7 to rotate.

[0028] The second movable mechanism 5 includes a short-handled impeller 51, a bearing-stage guide shell mechanism 52, a third guide ring 53, and a fourth guide ring 54. The short-handled impeller 51 and the third guide ring 53 are similar to a hollow frustum structure, and the fourth guide ring 54 is similar to a hollow cylinder structure. The short-handled impeller 51 and the bearing-stage guide shell mechanism 52 are sequentially sleeved onto the pump shaft 3, and the short-handled impeller 51 and the bearing-stage guide shell mechanism 52 are overlapped. The short-handled impeller 51 is located on one side of the inlet end. The third guide ring 53 is installed on the outer side of the short-handled impeller 51, and the fourth guide ring 54 is installed on the outer side of the bearing-stage guide shell mechanism 52. The third guide ring 53 is located inside the fourth guide ring 54. The third guide ring 53 and the fourth guide ring 54 of two adjacent sets of the second movable mechanism 5 are engaged (the third ring 56 is engaged with the third limiting groove). The third guide ring 53 and the fourth guide ring 54 are used for guiding flow, and the bearing-stage guide shell mechanism 52 is used to adjust the flow rate to adapt to different flow conditions.

[0029] like Figure 2As shown, the first movable mechanism 4 includes an impeller 41, a guide shell 42, a first guide ring 43, a second guide ring 44, a first ring 46, and a second ring 47. The first guide ring 43, the guide shell 42, and the impeller 41 are all similar to a hollow frustum structure, and the second guide ring 44 is similar to a hollow cylinder structure. The guide shell 42 is sleeved onto the outer outlet end of the impeller 41. The impeller 41 and the guide shell 42 are overlapped. The second ring 47 is installed at the outlet end of the impeller 41. The inlet end of the guide shell 42 is provided with a second limiting groove 48 that engages with the second ring 47. The first guide ring 43 is installed on the outer side of the impeller 41, and the second guide ring 44 is installed on the outer side of the guide shell 42. The first guide ring 43 is located inside the second guide ring 44. The inlet end of the outer wall of the first guide ring 43 is... A first limiting groove 45 is provided, and a first ring 46 is installed on the inner wall of the second guide ring 44, with the first ring 46 located on one side of the outlet end. The first guide rings 43 and second guide rings 44 of two adjacent sets of first movable mechanisms 4 are engaged. The first guide ring 43 of the first movable mechanism 4 is engaged with the fourth guide ring 54 of the adjacent set of second movable mechanisms 5 (the first ring 46 is engaged with the first limiting groove 45). The second guide ring 44 of the first movable mechanism 4 is engaged with the third guide ring 53 of the adjacent set of second movable mechanisms 5 (the first ring 46 is engaged with the third limiting groove 55, and the third ring 56 is engaged with the first limiting groove 45). The first guide rings 43 and second guide rings 44 are used for guiding flow, and the impeller 41 and guide shell 42 play an auxiliary adjustment role.

[0030] like Figure 3 As shown, the bearing-stage guide housing mechanism 52 includes a bearing-stage guide housing 521, a first bearing sleeve 522, a second bearing sleeve 523, a first bearing shell 524, a second bearing shell 525, and a limiting block 527. The first bearing sleeve 522, the second bearing sleeve 523, the first bearing shell 524, and the second bearing shell 525 are all hollow cylindrical structures. The bearing-stage guide housing 521 is similar to a hollow frustum structure. The first bearing sleeve 522 and the second bearing sleeve 523 are sequentially fitted onto the pump shaft at the outlet end of the short-handled impeller 51. The first bearing shell 524 is fitted onto the outside of the first bearing sleeve 522. The second bearing bush 525 is sleeved to the outside of the second bearing sleeve 523. The inlet end and outlet end of the inner wall of the bearing stage guide shell 521 are respectively sleeved to the outside of the first bearing bush 524 and the outside of the second bearing bush 525. A limiting block 527 is installed at the center of the inner wall of the bearing stage guide shell 521. The limiting block 527 is located between the first bearing bush 524 and the second bearing bush 525. The bearing stage guide shell 521 is also located at the outlet end of the short impeller 51. The limiting block 527 is used to separate the first bearing bush 524 and the second bearing bush 525, and also to push the first bearing bush 524 and the second bearing bush 525.

[0031] A third gap is provided between the first bearing sleeve 522 and the second bearing sleeve 523. A fifth limiting groove is provided at the outlet end on the outer side of the first bearing sleeve 522, and a sixth limiting groove is provided at the inlet end on the outer side of the second bearing sleeve 523. The first bearing bush 524 is located inside the fifth limiting groove and has a first gap with the inner wall of the fifth limiting groove. The second bearing bush 525 is located in the sixth limiting groove and has a second gap with the inner wall of the sixth limiting groove. The third gap, the fifth limiting groove and the sixth limiting groove form a keyway. The keyway is used for the bearing stage guide shell 521, the first bearing bush 524 and the second bearing bush 525 to move horizontally inside it, so as to achieve the effect of automatic flow regulation.

[0032] The second active mechanism 5 also includes a fourth ring 57. The fourth ring 57 is installed at the outlet end of the short impeller 51. The inlet end of the bearing stage guide shell 521 is provided with a fourth limiting groove 526 that engages with the fourth ring 57. The fourth limiting groove 526 plays a limiting role, ensuring that the fourth limiting groove 526 and the fourth ring 576 can be smoothly engaged when the bearing stage guide shell 521 moves horizontally.

[0033] The second movable mechanism 5 also includes a third ring 56. The third ring 56 is installed on the inner wall of the fourth guide ring 54. The third ring 56 is located on one side of the outlet end. The inlet end of the third guide ring 53 is provided with a third limiting groove 55. The third limiting groove 55 plays a limiting role. The third ring 56 is used to engage with the third limiting groove 55 of the second movable mechanism 5 in the adjacent group, and also to engage with the first guide ring 43 of the first movable mechanism 4 in the adjacent group.

[0034] like Figure 2-3 As shown, the first limiting groove 45, the second limiting groove 48, the third limiting groove 55, the fourth limiting groove 526, the fifth limiting groove, and the sixth limiting groove are all annular grooves, and all serve to limit movement, facilitate installation and disassembly, and are easy to replace.

[0035] like Figure 1 As shown, the lower pump head bearing bracket 2 is connected to the pump shaft 3 via a first bearing, and the upper pump head bearing bracket 1 is connected to the pump shaft 3 via a second bearing. Both the upper pump head bearing bracket 1 and the lower pump head bearing bracket 2 serve a supporting function.

[0036] The working principle of this invention is as follows: Taking the end of the pump shaft 3 near the lower pump head bearing bracket 2 as the inlet end and the end of the pump shaft 3 near the upper pump head bearing bracket 1 as the outlet end, when the motor is turned on, the motor's rotating shaft rotates, driving the pump shaft 3 to rotate. The pump shaft 3 drives several impellers 41, several short-handled impellers 51, several first bearing sleeves 522, and several second bearing sleeves 523 to rotate. The short-handled impellers 51 drive several guide shells 42 to rotate. The first bearing sleeves 522 and several second bearing sleeves 523 drive the first bearing bush 524, the second bearing bush 525, and the bearing stage guide shell 521 to rotate. Because a third gap is provided between the first bearing sleeve 522 and the second bearing sleeve 523, the first bearing sleeve 522 and the second bearing sleeve 523... The bearing stage guide shell 521, the limiting block 527, the first bearing bush 524, and the second bearing bush 525 are all located inside the keyway, and the keyway also has the first gap and the second gap. Therefore, the bearing stage guide shell 521, the limiting block 527, the first bearing bush 524, and the second bearing bush 525 continuously move horizontally inside the keyway. As the first bearing sleeve 522 and the second bearing sleeve 523 continuously move horizontally, the bearing stage guide shell 521, the limiting block 527, the first bearing bush 524, and the second bearing bush 525 continuously move horizontally inside the keyway, achieving the effect of automatically adjusting the flow rate. This allows the invention to be applied to different flow rate situations, thus achieving good versatility.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wide-span pump for use in sand-control environments, characterized in that: The pump shaft (3) includes an upper pump head bearing bracket (1), a lower pump head bearing bracket (2), a pump shaft (3), a first movable mechanism (4), a second movable mechanism (5), a pump stop ring (6), an isolation sleeve (7), and a pump housing (8). The pump shaft (3) is sequentially fitted with a lower pump head bearing bracket (2), several first movable mechanisms (4), several second movable mechanisms (5), several first movable mechanisms (4), an isolation sleeve (7), a pump stop ring (6), and an upper pump head bearing bracket (1) from one end to the other. The end of the pump shaft (3) closest to the lower pump head bearing bracket (2) is the inlet end, and the end of the pump shaft (3) closest to the upper pump head bearing bracket (1) is the outlet end. The outlet end of the pump shaft (3) is connected to the rotating shaft of the motor. The pump housing (8) is fitted to the outer wall of the first movable mechanism (4) and the second movable mechanism (5) and is located between the lower pump head bearing bracket (2) and the upper pump head bearing bracket (1). The second movable mechanism (5) includes a short impeller (51), a bearing-stage guide shell mechanism (52), a third guide ring (53), and a fourth guide ring (54). The short impeller (51) and the third guide ring (53) are similar to a hollow frustum structure, and the fourth guide ring (54) is similar to a hollow cylinder structure. The short impeller (51) and the bearing-stage guide shell mechanism (52) are sequentially sleeved onto the pump shaft (3), and the short impeller (51) and the bearing-stage guide shell mechanism (52) are overlapped. The short impeller (51) is located on one side of the inlet end. The third guide ring (53) is installed on the outside of the short impeller (51), and the fourth guide ring (54) is installed on the outside of the bearing-stage guide shell mechanism (52). The third guide ring (53) is located inside the fourth guide ring (54), and the third guide ring (53) and the fourth guide ring (54) of the two adjacent sets of the second movable mechanism (5) are engaged. The bearing-stage guide shell mechanism (52) includes a bearing-stage guide shell (521), a first bearing sleeve (522), a second bearing sleeve (523), a first bearing shell (524), a second bearing shell (525), and a limiting block (527). The first bearing sleeve (522), the second bearing sleeve (523), the first bearing shell (524), and the second bearing shell (525) are all hollow cylindrical structures. The bearing-stage guide shell (521) is similar to a hollow frustum structure. The first bearing sleeve (522) and the second bearing sleeve (523) are sequentially sleeved onto the pump shaft at the outlet end of the short impeller (51). The first bearing shell (524) is fitted to the outside of the first bearing sleeve (522), and the second bearing shell (525) is fitted to the outside of the second bearing sleeve (523). The inlet end and outlet end of the inner wall of the bearing stage guide shell (521) are fitted to the outside of the first bearing shell (524) and the outside of the second bearing shell (525), respectively. A limiting block (527) is installed at the center of the inner wall of the bearing stage guide shell (521). The limiting block (527) is located between the first bearing shell (524) and the second bearing shell (525). The bearing stage guide shell (521) is also located at the outlet end of the short handle impeller (51). A third gap is provided between the first bearing sleeve (522) and the second bearing sleeve (523). A fifth limiting groove is provided at the outlet end on the outside of the first bearing sleeve (522), and a sixth limiting groove is provided at the inlet end on the outside of the second bearing sleeve (523). The first bearing bush (524) is located inside the fifth limiting groove and has a first gap with the inner wall of the fifth limiting groove. The second bearing bush (525) is located in the sixth limiting groove and has a second gap with the inner wall of the sixth limiting groove. The third gap, the fifth limiting groove and the sixth limiting groove form a keyway. The lower pump head bearing bracket (2) is connected to the inlet end of the pump shaft (3) via the first bearing, and the upper pump head bearing bracket (1) is connected to the outlet end of the pump shaft (3) via the second bearing.

2. The wide-span pump for sand-control environments according to claim 1, characterized in that: The first active mechanism (4) includes an impeller (41), a guide shell (42), a first guide ring (43), a second guide ring (44), a first ring (46), and a second ring (47). The first guide ring (43), the guide shell (42), and the impeller (41) are all similar to a hollow frustum structure. The second guide ring (44) is similar to a hollow cylinder structure. The guide shell (42) is sleeved onto the outlet end of the impeller (41). The impeller (41) and the guide shell (42) are overlapped. The second ring (47) is installed at the outlet end of the impeller (41). The inlet end of the guide shell (42) is provided with a second limiting groove (48) that engages with the second ring (47). The first guide ring (43) is installed on the outer side of the impeller (41). A second guide ring (44) is installed on the outside of 42), and a first guide ring (43) is located inside the second guide ring (44). A first limiting groove (45) is provided at the inlet end of the outer wall of the first guide ring (43). A first ring (46) is installed on the inner wall of the second guide ring (44), and the first ring (46) is located on one side of the outlet end. The first guide ring (43) and the second guide ring (44) of the two adjacent groups of first movable mechanisms (4) are engaged. The first guide ring (43) of the first movable mechanism (4) is engaged with the fourth guide ring (54) of the adjacent group of second movable mechanisms (5). The second guide ring (44) of the first movable mechanism (4) is engaged with the third guide ring (53) of the adjacent group of second movable mechanisms (5).

3. The wide-span pump for sand-control environments according to claim 2, characterized in that: The second active mechanism (5) also includes a fourth ring (57), the fourth ring (57) is installed at the outlet end of the short impeller (51), and the inlet end of the bearing stage guide shell (521) is provided with a fourth limiting groove (526) that engages with the fourth ring (57).

4. The wide-span pump for sand-control environments according to claim 3, characterized in that: The second active mechanism (5) also includes a third ring (56), the third ring (56) is installed on the inner wall of the fourth guide ring (54), the third ring (56) is located on one side of the outlet end, and the inlet end of the third guide ring (53) is provided with a third limiting groove (55).

5. The wide-span pump for sand-control environments according to claim 4, characterized in that: The first limiting groove (45), the second limiting groove (48), the third limiting groove (55), the fourth limiting groove (526), ​​the fifth limiting groove, and the sixth limiting groove are all annular grooves.

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