Efficient fluid centrifugal pump assembly

Abstract

The invention discloses an efficient fluid centrifugal pump assembly which comprises a pump body and further comprises a sliding groove formed in the inner wall of the pump body, and an open groove is formed in the end, corresponding to the water injection opening, of the sliding groove. The shielding piece is movably arranged in the sliding groove and used for controlling connection and disconnection between the water injection opening and the open groove; the expansion sleeve is arranged on the shielding piece; and the thrust assembly is arranged in the shielding piece, and when the shielding piece is completely separated between the water injection opening and the open groove, the thrust assembly controls the expansion sleeve to be supported so as to fill the gap, connected with one side of the inner wall of the pump body, of the open groove. By arranging the shielding piece, the water injection opening can be separated from the position close to the inner wall of the pump body in the direction of the inner wall of the pump body, and under the arrangement of the expansion sleeve and the thrust assembly, the expansion sleeve is supported towards the inner side of the open groove while the water injection opening is completely separated by the shielding piece, so that the small space of the open groove is filled; therefore, the rotation integrity of the internal space of the pump body is ensured to the greatest extent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal pumps, in particular to a high-efficiency fluid centrifugal pump assembly. BACKGROUND

[0002] A centrifugal pump refers to a pump that uses centrifugal force generated by the rotation of an impeller to transport liquid. The existing centrifugal pump assembly can basically meet the daily use requirements, but still needs to be improved in some aspects.

[0003] Patent document CN118327986A discloses a horizontal centrifugal pump on July 12, 2024, which includes a pump body, a water seal assembly, and a rotating rod. The pump body has a water inlet, a working cavity, and a water outlet. The rotating rod is connected to an impeller at its end. The water seal assembly includes a movable ring, a fixed ring, a tight ring capsule, and a sealing piston. The movable ring is coaxially connected to the outer wall of the rotating rod. The pump body surface is provided with a tight cavity. The outer ring of the tight ring capsule is connected to the inner wall of the tight cavity. One end of the fixed ring is connected to the tight ring capsule, and the other end of the fixed ring is tightly connected to the surface of the movable ring to form a rotating seal. The inner wall of the working cavity is provided with a sealing cavity. The inner wall of the sealing cavity is provided with an air duct. The air duct connects the sealing cavity and the inner cavity of the tight ring capsule. In this application, the fixed ring, the movable ring, the tight ring capsule, and the sealing piston are arranged. The inner cavity of the tight ring capsule is pressurized and expanded to drive the fixed ring to tightly contact the movable ring to form a rotating seal, thereby ensuring the tightness between the movable ring and the fixed ring, preventing water in the working cavity from overflowing from the water seal assembly, and improving the sealing effect of the horizontal centrifugal pump.

[0004] In the prior art as described above, the pump body needs to be filled with water before use to form a vacuum and a pressure difference with the help of liquid medium to ensure smooth start of the centrifugal pump. Therefore, a water inlet needs to be provided on the pump body, which is connected to the inside of the pump body. During use, the water inlet is closed, but during the operation of the pump body, the water inlet forms a redundant space on the rotating pump body, which affects the fast flowing fluid, causes the edge of the flow path to be disordered, or causes vibration, etc. Therefore, a high-efficiency fluid centrifugal pump assembly is needed to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a high-efficiency fluid centrifugal pump assembly to solve the above problems in the prior art.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme:

[0007] The application discloses a high-efficiency fluid centrifugal pump assembly which comprises a pump body, a water injection opening arranged at the upper end of the pump body, a sliding groove arranged in the inner wall of the pump body, a slot arranged at one end of the water injection opening corresponding to the sliding groove, a shielding piece movably arranged in the sliding groove and used for controlling the on-off of the water injection opening and the slot, an expansion sleeve arranged on the shielding piece, and a thrust assembly arranged in the shielding piece.

[0008] Preferably, the shielding piece is internally provided with a cavity, the thrust assembly comprises a trigger rod movably arranged in the cavity, the trigger rod is connected with a support through a hinged connecting rod, the support is fixed on the inner wall of the expansion sleeve, and the trigger rod is movably penetrated through the end face of the shielding piece at the end away from the sliding groove.

[0009] Preferably, the upper end of the pump body is provided with a head base, a sliding sleeve is movably arranged on the head base, the sliding sleeve is sleeved outside the water injection opening, and the sliding sleeve is connected with the shielding piece through a linkage assembly.

[0010] Preferably, the linkage assembly comprises a linkage sleeve rotatably arranged in the head base, the linkage sleeve is sleeved outside the sliding sleeve and is screw transmission connected with the sliding sleeve, and the lower end of the linkage sleeve is transmission connected with the shielding piece through a bevel gear.

[0011] Preferably, the inner wall of the linkage sleeve is provided with a spiral groove, and the outer wall of the sliding sleeve is provided with a sliding convex which is slidingly connected with the spiral groove.

[0012] Preferably, the lower end of the linkage sleeve is coaxially sleeved with a gear ring, the shielding piece is connected with an arc-shaped gear rack movably arranged in the head base through a connecting piece, and a transmission gear meshed and connected between the gear ring and the arc-shaped gear rack is rotatably arranged in the head base.

[0013] Preferably, the outer side of the linkage sleeve is connected with the inner wall of the head base through an elastic torsion piece, and the head base is internally provided with a limiting assembly used for limiting the movement of the sliding sleeve.

[0014] Preferably, the limiting assembly comprises a retraction groove arranged on the head base, a limiting piece is elastically movably arranged in the retraction groove, and the sliding sleeve is provided with a limiting hole matched with the limiting piece.

[0015] Preferably, the head base is rotatably provided with a linkage ring, the limiting piece is fixedly provided with a linkage pin, the linkage ring is provided with a linkage groove matched with the linkage pin, and the linkage ring is provided with a pushing piece slidingly penetrating through the side wall of the head base at one side.

[0016] Preferably, a gap for inserting an external water pipe is formed between the water injection opening and the sliding sleeve, and the limiting piece elastically extends into the gap when the limiting piece and the limiting hole are matched.

[0017] In the above technical scheme, the application has the following beneficial effects:

[0018] The high-efficiency fluid centrifugal pump assembly can block the water injection port by the inner wall trend of the pump body by setting the shielding piece, and at the same time of completely blocking the water injection port by the shielding piece, the expansion sleeve is lifted to the inside of the slot, so that the small space of the slot is filled, thereby guaranteeing the rotation integrity of the internal space of the pump body to the greatest extent, avoiding the disorder of part of the flow path of the inner edge of the pump body, eliminating the vibration hidden danger, and improving the operation efficiency.

[0019] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not intended to limit the present disclosure.

[0020] This application file provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0022] Figure 1 The overall structure schematic diagram provided for the embodiments of the present application;

[0023] Figure 2 The front view cross-sectional structure schematic diagram provided for the embodiments of the present application;

[0024] Figure 3 The front view cross-sectional structure schematic diagram provided for the embodiments of the present application; Figure 2 The enlarged structure schematic diagram at A in the front view cross-sectional structure schematic diagram;

[0025] Figure 4 The side view cross-sectional structure schematic diagram provided for the embodiments of the present application;

[0026] Figure 5 The side view cross-sectional structure schematic diagram provided for the embodiments of the present application; Figure 4 The enlarged structure schematic diagram at B in the side view cross-sectional structure schematic diagram;

[0027] Figure 6 The head seat internal structure schematic diagram provided for the embodiments of the present application;

[0028] Figure 7 The shielding piece structure schematic diagram provided for the embodiments of the present application.

[0029] Explanation of reference signs:

[0030] 1, pump body; 2, water inlet; 3, sliding groove; 4, slot; 5, shielding piece; 6, expansion sleeve; 7, cavity; 8, trigger rod; 9, connecting rod; 10, support; 11, head seat; 12, sliding sleeve; 13, linkage sleeve; 14, spiral groove; 15, sliding convex; 16, gear ring; 17, connecting piece; 18, arc-shaped rack; 19, transmission gear; 20, elastic torsion piece; 21, retraction groove; 22, limiting piece; 23, limiting hole; 24, linkage ring; 25, linkage pin; 26, linkage groove; 27, shifting piece. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the protection scope of the present disclosure.

[0032] Please refer to Figures 1-7 The high-efficiency fluid centrifugal pump assembly provided by the embodiments of the present disclosure comprises a pump body 1, the upper end of the pump body 1 is provided with a water inlet 2, further comprising a sliding groove 3, which is arranged in the inner wall of the pump body 1 and is provided with a slot 4 at one end corresponding to the water inlet 2; a shielding piece 5, which is movably arranged in the sliding groove 3 and is used to control the on-off between the water inlet 2 and the slot 4; an expansion sleeve 6, which is arranged on the shielding piece 5; and a thrust assembly, which is arranged in the shielding piece 5, when the shielding piece 5 completely blocks between the water inlet 2 and the slot 4, the thrust assembly controls the expansion sleeve 6 to prop up to fill the gap on one side of the slot 4 connecting the inner wall of the pump body 1.

[0033] Specifically, the pump body 1 is horizontal, that is, the axis of the impeller is horizontally arranged. The water inlet of the pump body 1 is arranged on one side of the center, and the water outlet is arranged upward and on one side of the rotating surface of the pump body 1. The water injection port 2 is used to connect to the external water flow to fill the pump body 1 with water, facilitating subsequent startup. The sliding groove 3 is arranged along the arc of the outermost circle of the pump body 1 and is opened in the solid of the outer wall of the pump body 1. The slot 4 is opposite to the water injection port 2. When there is no obstruction, the water injection port 2 is directly connected to the inside of the pump body 1 through the slot 4. The shielding member 5 matches the shape of the sliding groove 3. Based on the axis of the pump body 1, the arc set by the shielding member 5 is larger than the arc set by the slot 4, thus ensuring that the shielding member 5 can completely block the slot 4. The expansion and contraction sleeve 6 is elastic and automatically maintains a contracted state under the elastic force. When contracted, its outer wall is consistent with the outer wall of the shielding member 5. When the shielding member 5 completely blocks between the water injection port 2 and the slot 4, the expansion and contraction sleeve 6 corresponds to the slot 4, and the size of the expansion and contraction sleeve 6 matches the size of the slot 4. The thrust component applies multi-point thrust to the expansion and contraction sleeve 6 to make the expansion and contraction sleeve 6 expand as a whole, and the outer wall shape after expansion is close to the inner wall shape of the pump body 1. After the expansion and contraction sleeve 6 expands, only a small "mouth" - shaped gap is left on the inner wall of the pump body 1 at the slot 4. Under this gap, it is also convenient for the expansion and contraction sleeve 6 to meet the contraction requirement when the shielding member 5 retracts. In the actual use of this technical solution, when the shielding member 5 retracts into the sliding groove 3, the expansion and contraction sleeve 6 remains contracted, and the water injection port 2 is connected to the slot 4, that is, the water injection port 2 remains connected to the inside of the pump body 1. Thus, external water injection into the pump body 1 can be carried out. After the water injection is completed, the shielding member 5 moves towards the slot 4 until it completely blocks between the water injection port 2 and the slot 4. At this time, the thrust component can also control the expansion and contraction sleeve 6 to撑起 to fill the gap on the side of the slot 4 connecting the inner wall of the pump body 1, thereby ensuring the rotational integrity of the internal space of the pump body 1 to the greatest extent and avoiding the disorder of some flow paths at the inner edge of the pump body 1.

[0034] Compared with the prior art, an efficient fluid centrifugal pump assembly proposed in an embodiment of the present invention can block the water injection port 2 along the inner wall direction of the pump body 1 near the inner wall of the pump body 1 by setting the shielding member 5. Also, with the setting of the expansion and contraction sleeve 6 and the thrust component, when the shielding member 5 completely blocks the water injection port 2, the expansion and contraction sleeve 6 expands towards the inside of the slot 4, so that this small space of the slot 4 is filled, thereby ensuring the rotational integrity of the internal space of the pump body 1 to the greatest extent, avoiding the disorder of some flow paths at the inner edge of the pump body 1, eliminating the vibration hidden danger, and improving the operation efficiency.

[0035] As a preferred technical scheme of the embodiment, the shielding piece 5 is provided with a cavity 7, the thrust assembly comprises a trigger rod 8 movably arranged in the cavity 7, the trigger rod 8 is connected with a support piece 10 through a hinged connecting rod 9, the support piece 10 is fixed on the inner wall of the expansion sleeve 6, and the trigger rod 8 movably penetrates the end face of the shielding piece 5 at the end away from the sliding groove 3. Specifically, the side of the cavity 7 away from the water inlet 2 is shielded by the expansion sleeve 6, so that the expansion direction of the expansion sleeve 6 is also limited to the inside of the slotted groove 4; the movement direction of the trigger rod 8 is consistent with the movement direction of the shielding piece 5; the connecting rod 9 is hinged to the trigger rod 8 and the support piece 10 at both ends, respectively; the support piece 10 is in the shape of an arc strip, and is arranged in multiple in a symmetrical and uniform manner in a direction perpendicular to the extension direction, and the extension direction is consistent with the movement direction of the shielding piece 5; and the same support piece 10 is movably connected with the trigger rod 8 through no less than two connecting rods 9. With the arrangement of the plurality of support pieces 10, the shape of the expansion sleeve 6 after expansion can be matched with the inner wall of the pump body 1. When the shielding piece 5 completely shields the slotted groove 4, the end of the trigger rod 8 extending out of the shielding piece 5 abuts against the inner wall of the slotted groove 4 to move, at this time, the trigger rod 8 drives the support piece 10 to move away from the trigger rod 8 through the swing change of the connecting rod 9 to support the expansion sleeve 6, that is, the expansion sleeve 6 expands. When the shielding piece 5 is retracted into the sliding groove 3, the expansion sleeve 6 elastically contracts, and then the end of the trigger rod 8 extends out of the shielding piece 5 again.

[0036] The use of the expansion sleeve 6 is to deal with the situation that a large groove is still left on the side close to the inner wall of the pump body 1 after the slotted groove 4 is shielded by the shielding piece 5. When the thickness of the groove is thin, the use of the expansion sleeve 6 can be omitted.

[0037] In another embodiment of the application, the upper end of the pump body 1 is provided with a head seat 11, the head seat 11 movably has a sliding sleeve 12 arranged thereon, the sliding sleeve 12 is arranged on the outer side of the water inlet 2 and is connected with the shielding piece 5 through a linkage assembly. Specifically, the head seat 11 is used to support the sliding sleeve 12 and related structures; the sliding sleeve 12 is connected with the water inlet 2 through a key groove, that is, the sliding sleeve 12 is only axially movable relative to the water inlet 2; under the arrangement of the linkage assembly, the sliding sleeve 12 moves downward to drive the shielding piece 5 to open, and the sliding sleeve 12 moves upward to drive the shielding piece 5 to close.

[0038] As the preferred technical scheme of the embodiment, the linkage assembly comprises a linkage sleeve 13 rotatably arranged in the head base 11, the linkage sleeve 13 is sleeved outside the sliding sleeve 12 and is screw transmission connected with the sliding sleeve 12, the lower end of the linkage sleeve 13 is transmission connected with the shielding piece 5 through a bevel gear, specifically, the inner wall of the linkage sleeve 13 is provided with a spiral groove 14, the outer wall of the sliding sleeve 12 is provided with a sliding convex 15 which is slidingly connected with the spiral groove 14, through the arrangement of the spiral groove 14 and the sliding convex 15, the lifting of the sliding sleeve 12 can directly link the rotation of the linkage sleeve 13; the lower end of the linkage sleeve 13 is coaxially sleeved with a gear ring 16, the shielding piece 5 is connected with an arc-shaped gear rack 18 movably arranged in the head base 11 through a connecting piece 17, a transmission gear 19 is rotatably arranged in the head base 11 and is meshingly connected between the gear ring 16 and the arc-shaped gear rack 18; one end of the head base 11 away from the slot 4 is connected with the connecting piece 17, and the extension direction of the arc-shaped gear rack 18 is consistent with the movement direction of the shielding piece 5. In actual use, the sliding sleeve 12 is lowered to drive the sliding convex 15 to be lowered, the spiral transmission between the sliding convex 15 and the spiral groove 14 causes the linkage sleeve 13 to rotate, the linkage sleeve 13 drives the gear ring 16 to rotate, the gear ring 16 drives the arc-shaped gear rack 18 through the transmission gear 19, at this time, the movement direction of the arc-shaped gear rack 18 drives the shielding piece 5 to retract into the sliding groove 3, that is, to open the channel between the water inlet 2 and the inside of the pump body 1; conversely, the sliding convex 15 is raised, and then the transmission is performed through the sliding convex 15, the spiral groove 14, the linkage sleeve 13, the gear ring 16 and the transmission gear 19, at this time, the movement direction of the arc-shaped gear rack 18 drives the shielding piece 5 to move into the slot 4, that is, to close the channel between the water inlet 2 and the inside of the pump body 1.

[0039] As the preferred technical scheme of the embodiment, the linkage sleeve 13 is connected with the inner wall of the head base 11 through an elastic torsion piece 20, the head base 11 is provided with a limiting assembly for limiting the movement of the sliding sleeve 12, specifically, the elastic torsion piece 20 is preferably a coil spring, one end of the coil spring is connected with the inner wall of the head base 11, and the other end of the coil spring is connected with the outer wall of the linkage sleeve 13; the arrangement of the elastic torsion piece 20 limits the rotation of the linkage sleeve 13, and the rotation angle of the linkage sleeve 13 under this limitation, the sliding sleeve 12 through the linkage of the spiral groove 14 and the sliding convex 15 is located at the highest position in the lifting range, and the shielding piece 5 is located at the position of completely shielding the slot 4, that is, the channel between the water inlet 2 and the inside of the pump body 1 is kept closed; when the limiting assembly limits the sliding sleeve 12 to the lowest position, the limiting assembly limits the sliding sleeve 12, and then the limiting assembly limits the shielding piece 5 to be retracted into the sliding groove 3, that is, the channel between the water inlet 2 and the inside of the pump body 1 is kept open; when the limiting function of the limiting assembly is cancelled, the linkage sleeve 13 is reset under the elastic force release of the elastic torsion piece 20, and then the sliding sleeve 12 is reset to rise, and the shielding piece 5 is reset to shield the slot 4.

[0040] As the preferred technical scheme of the embodiment, the limiting assembly comprises a retraction groove 21 arranged on the head base 11, a limiting piece 22 elastically arranged in the retraction groove 21, and a limiting hole 23 arranged on the sliding sleeve 12 and matched with the limiting piece 22. Specifically, the retraction groove 21 guides the limiting piece 22, and the guiding direction is arranged along the radial direction of the sliding convex 15. A spring is arranged in the retraction groove 21 to abut against the limiting piece 22, so that the limiting piece 22 maintains a tendency of extending out of the retraction groove 21. When the sliding sleeve 12 is lowered to the lowest position of the lifting range, the limiting hole 23 is corresponded with the limiting piece 22. When the limiting hole 23 is corresponded with the limiting piece 22, the limiting piece 22 extends into the limiting hole 23 under the elastic force. The limiting piece 22 is preferably a plurality of limiting pieces, which are evenly arranged around the circumference of the sliding sleeve 12.

[0041] As the preferred technical scheme of the embodiment, the head base 11 is rotatably arranged with a linkage ring 24, the limiting piece 22 is fixedly arranged with a linkage pin 25, the linkage ring 24 is arranged with a linkage groove 26 matched with the linkage pin 25, and one side of the linkage ring 24 is arranged with a pushing piece 27 slidingly penetrating the side wall of the head base 11. Specifically, the linkage ring 24 is arranged outside the sliding sleeve 12 and coaxially arranged. The linkage ring 24 is arranged above each retraction groove 21. The linkage pin 25 is vertically arranged. The two ends of the linkage groove 26 are arranged at a distance from the center of the linkage ring 24. The two ends of the linkage groove 26 correspond to the positions of the two ends of the range in which the limiting piece 22 drives the linkage pin 25 to move. The linkage ring 24 switches the two ends of the linkage groove 26 to correspond to the linkage pin 25 by rotating. The pushing piece 27 is used to control the rotation of the linkage ring 24 by external control. In actual use, when the sliding sleeve 12 is not lowered, the limiting piece 22 is completely retracted in the retraction groove 21, and the linkage pin 25 corresponds to the far end of the sliding groove 3 from the center of the linkage ring 24. Then, the sliding sleeve 12 is lowered to the lowest position, the limiting piece 22 extends out of the retraction groove 21 to embed in the limiting hole 23 under the elastic force, and the limiting piece 22 drives the linkage pin 25 to move, and the linkage pin 25 moves relatively in the sliding groove 3 to make the linkage ring 24 rotate. Then, the pushing piece 27 is externally pushed to drive the linkage ring 24 to rotate actively, the linkage ring 24 drives the sliding groove 3 to rotate, the sliding groove 3 controls the movement of the linkage pin 25, and the linkage pin 25 drives the limiting piece 22 to move back to the retraction groove 21 until the limiting piece 22 leaves the limiting hole 23. The sliding sleeve 12 can be automatically lifted and reset according to the above principle, and the limiting piece 22 is also kept in the retracted state due to the shielding of the outer wall of the sliding sleeve 12.

[0042] As the preferred technical scheme of the embodiment, a gap for inserting the external water pipe is formed between the water inlet 2 and the sliding sleeve 12, and the limiting member 22 with elastic force extends into the gap when the limiting member 22 corresponds to the limiting hole 23. Specifically, in actual use, when the external water pipe is connected to the water inlet 2, the external water pipe is usually manually held to maintain the connection relationship and avoid the reaction force during water injection to make the water pipe fall off, but in the embodiment, the water pipe can be automatically locked on the water inlet 2. The end of the limiting member 22 can be provided with a convex pattern to generate damping; the gap between the water inlet 2 and the sliding sleeve 12 can conveniently allow the external water pipe to be inserted, and then during the process of moving the water pipe downward to form a connection with the water inlet 2, the water pipe directly pushes the sliding sleeve 12 downward, so that through the above principle, the shielding member 5 is linked to open, and the limiting member 22 corresponds to the limiting hole 23, so that the limiting member 22 extends into the limiting hole 23 under the elastic force and further extends into the gap between the water inlet 2 and the sliding sleeve 12. At this time, since the pipe wall of the water pipe is embedded in the gap, the limiting member 22 can be pressed against the outer wall of the water pipe, thereby automatically maintaining the connection relationship between the water pipe and the water inlet 2 without manual holding, and in this process, the automatic communication between the water inlet 2 and the pump body 1 is realized; in addition, when the push member 27 is pushed to drive the limiting member 22 to retract and reset, the elastic rotation of the linking sleeve 13 causes the sliding sleeve 12 to automatically rise and reset, so that the shielding member 5 not only re-seals the channel between the water inlet 2 and the pump body 1, but also the water pipe is automatically separated from the water inlet 2 with the rising of the sliding sleeve 12.

[0043] The foregoing merely describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present application.

Claims

1. A high-efficiency fluid centrifugal pump assembly, comprising a pump body (1), wherein a water inlet (2) is provided at the upper end of the pump body (1), characterized in that, Also includes: The sliding groove (3) is opened on the inner wall of the pump body (1), and a groove (4) is provided at one end corresponding to the water inlet (2). The shield (5) is movably set in the sliding groove (3) to control the opening and closing between the water inlet (2) and the slot (4); An expansion sleeve (6) is provided on a shielding component (5); The thrust assembly is located inside the shield (5). When the shield (5) is completely separated between the water inlet (2) and the slot (4), the thrust assembly controls the expansion sleeve (6) to lift up to fill the gap between the slot (4) and the inner wall of the pump body (1).

2. The high-efficiency fluid centrifugal pump assembly according to claim 1, characterized in that, The shielding component (5) has a cavity (7) inside. The thrust assembly includes a trigger rod (8) that is movably disposed inside the cavity (7). The trigger rod (8) is connected to a support component (10) via a hinged connecting rod (9). The support component (10) is fixed on the inner wall of the expansion sleeve (6). The end of the trigger rod (8) away from the sliding groove (3) movably passes through the end face of the shielding component (5).

3. The high-efficiency fluid centrifugal pump assembly according to claim 1, characterized in that, The pump body (1) is provided with a head seat (11) at the upper end. A sliding sleeve (12) is movably provided on the head seat (11). The sliding sleeve (12) is fitted on the outside of the water inlet (2) and is linked with the shielding component (5) through the linkage component.

4. The high-efficiency fluid centrifugal pump assembly according to claim 3, characterized in that, The linkage assembly includes a linkage sleeve (13) rotatably disposed inside the headstock (11). The linkage sleeve (13) is sleeved on the outside of the sliding sleeve (12) and the two are connected by a spiral drive. The lower end of the linkage sleeve (13) is connected to the shielding member (5) by a bevel gear drive.

5. The high-efficiency fluid centrifugal pump assembly according to claim 4, characterized in that, The inner wall of the linkage sleeve (13) is provided with a spiral groove (14), and the outer wall of the sliding sleeve (12) is provided with a sliding protrusion (15) that is slidably connected to the spiral groove (14).

6. The high-efficiency fluid centrifugal pump assembly according to claim 4, characterized in that, The lower end of the linkage sleeve (13) is coaxially sleeved with a toothed ring (16), and the shielding member (5) is connected by a connecting member (17) to an arc-shaped rack (18) that is movably arranged in the head seat (11). A transmission gear (19) that meshes between the toothed ring (16) and the arc-shaped rack (18) is rotatably arranged in the head seat (11).

7. The high-efficiency fluid centrifugal pump assembly according to claim 4, characterized in that, The outer side of the linkage sleeve (13) is connected to the inner wall of the head seat (11) through an elastic torsion member (20), and a limiting component for restricting the movement of the sliding sleeve (12) is provided inside the head seat (11).

8. The high-efficiency fluid centrifugal pump assembly according to claim 6, characterized in that, The limiting component includes a retraction groove (21) provided on the head base (11), a limiting member (22) is elastically and movably provided in the retraction groove (21), and a limiting hole (23) matching the limiting member (22) is provided on the sliding sleeve (12).

9. The high-efficiency fluid centrifugal pump assembly according to claim 8, characterized in that, A linkage ring (24) is rotatably provided inside the head seat (11), a linkage pin (25) is fixedly provided on the limiting member (22), a linkage groove (26) matching the linkage pin (25) is provided on the linkage ring (24), and a lever (27) that slides through the side wall of the head seat (11) is provided on one side of the linkage ring (24).

10. The high-efficiency fluid centrifugal pump assembly according to claim 8, characterized in that, A gap is formed between the water inlet (2) and the sliding sleeve (12) for inserting an external water pipe. When the limiting member (22) corresponds to the limiting hole (23), the limiting member (22) extends into the gap with elastic force.

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