A high efficiency fluid centrifugal pump assembly

Abstract

The application discloses a high-efficiency fluid centrifugal pump assembly, which comprises a pump body, a water injection port arranged at the upper end of the pump body, a sliding groove arranged in the inner wall of the pump body and provided with a slot at the end corresponding to the water injection port, a shielding piece movably arranged in the sliding groove and used for controlling the on-off between the water injection port and the slot, an expansion sleeve arranged on the shielding piece, and a thrust assembly arranged in the shielding piece, wherein when the shielding piece completely blocks the water injection port and the slot, the expansion sleeve is controlled by the thrust assembly to be lifted up to fill the gap between the slot and the inner wall of the pump body. The water injection port is blocked by the shielding piece along the trend of the inner wall of the pump body, and meanwhile, the expansion sleeve is lifted up to the inner side of the slot when the shielding piece completely blocks the water injection port, so that the small space of the slot is filled, and the rotation integrity of the inner space of the pump body is ensured to the maximum.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pump technology, and more specifically to a high-efficiency fluid centrifugal pump assembly. Background Technology

[0002] Centrifugal pumps are pumps that use centrifugal force generated by the rotation of an impeller to transport liquids. Existing centrifugal pump components can basically meet daily usage needs, but there are still some shortcomings that need to be improved.

[0003] Patent document CN118327986A, published on July 12, 2024, discloses a horizontal centrifugal pump, including a pump body, a water seal assembly, and a rotating rod. The pump body has an inlet, a working chamber, and an outlet. An impeller is connected to the end of the rotating rod. The water seal assembly includes a moving ring, a fixed ring, a clamping ring, and a sealing piston. The moving ring is coaxially connected to the outer wall of the rotating rod. A clamping chamber is formed on the surface of the pump body. The outer ring of the clamping ring is connected to the inner wall of the clamping chamber. One end of the fixed ring is connected to the clamping ring, and the other end of the fixed ring clamps the surface of the moving ring to form a rotational seal. A sealing chamber is formed on the inner wall of the working chamber. An air passage is formed on the inner wall of the sealing chamber, and the air passage connects the sealing chamber and the inner cavity of the clamping ring. The arrangement of the fixed ring, moving ring, clamping ring bladder, and sealing piston in this application allows the inner cavity of the clamping ring bladder to be pressurized and expanded, driving the fixed ring to clamp the moving ring to form a rotational seal. This ensures the clamping force between the moving ring and the fixed ring, making it difficult for water in the working chamber to overflow from the water seal assembly, thereby improving the sealing effect of the horizontal centrifugal pump itself.

[0004] In the prior art, as described in the aforementioned patent, the centrifugal pump needs to be filled with water before use to create a vacuum and pressure difference through the liquid medium, ensuring smooth start-up. This requires a water inlet on the pump body, which is connected to the interior of the pump body. During use, the water inlet is closed, but when the pump is running, the water inlet creates extra space on the rotating pump body, affecting the rapidly flowing fluid, causing flow path disturbance at the edges, or triggering vibrations. Therefore, there is an urgent need for a high-efficiency fluid centrifugal pump assembly to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency fluid centrifugal pump assembly to overcome the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A high-efficiency centrifugal pump assembly includes a pump body with a water inlet at the upper end, and further includes: a sliding groove formed on the inner wall of the pump body, with a slot at one end corresponding to the water inlet; a blocking member movably disposed within the sliding groove for controlling the connection between the water inlet and the slot; an expansion sleeve disposed on the blocking member; and a thrust assembly disposed within the blocking member. When the blocking member completely separates the water inlet from the slot, the thrust assembly controls the expansion sleeve to expand and fill the gap between the slot and the inner wall of the pump body.

[0008] Preferably, the shielding component has a cavity, and the thrust assembly includes a trigger rod that is movably disposed within the cavity. The trigger rod is connected to a support component via a hinged connecting rod. The support component is fixed to the inner wall of the expansion sleeve, and the end of the trigger rod away from the sliding groove movably passes through the end face of the shielding component.

[0009] Preferably, the pump body is provided with a head seat at the upper end, and a sliding sleeve is movably disposed on the head seat. The sliding sleeve is fitted outside the water inlet and is linked with the shielding component through a linkage component.

[0010] Preferably, the linkage assembly includes a linkage sleeve rotatably disposed inside the headstock, the linkage sleeve being sleeved on the outside of the sliding sleeve and the two being connected by a helical drive, and the lower end of the linkage sleeve being connected to the shielding component by a bevel gear drive.

[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 protrusion that is slidably connected to the spiral groove.

[0012] Preferably, a toothed ring is coaxially sleeved at the lower end of the linkage sleeve, and an arc-shaped rack that is movably disposed within the headstock is connected to the shielding member via a connector. A transmission gear that meshes with the toothed ring and the arc-shaped rack is rotatably disposed within the headstock.

[0013] Preferably, the outer side of the linkage sleeve is connected to the inner wall of the head seat through an elastic torsion member, and a limiting component for restricting the movement of the sliding sleeve is provided inside the head seat.

[0014] Preferably, the limiting component includes a retraction groove provided on the headstock, a limiting element elastically and movably provided in the retraction groove, and a limiting hole provided on the sliding sleeve that matches the limiting element.

[0015] Preferably, a linkage ring is rotatably provided inside the head seat, a linkage pin is fixedly provided on the limiting member, a linkage groove matching the linkage pin is provided on the linkage ring, and a lever is provided on one side of the linkage ring that slides through the side wall of the head seat.

[0016] Preferably, a gap is formed between the water inlet and the sliding sleeve for inserting an external water pipe. When the limiting member corresponds to the limiting hole, the limiting member extends into the gap with elastic force.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] This high-efficiency centrifugal pump assembly, by incorporating a shielding component, can isolate the water inlet near the pump body wall. Furthermore, with the addition of an expansion sleeve and thrust assembly, while the shielding component completely isolates the water inlet, the expansion sleeve expands inward towards the slot, filling the small space within the slot. This maximizes the integrity of the pump body's internal rotation, prevents flow path disruption at the pump body's internal edges, eliminates vibration hazards, and improves operating efficiency.

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

[0020] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0023] Figure 2 This is a frontal cross-sectional structural schematic diagram provided for an embodiment of the present invention;

[0024] Figure 3 Provided for embodiments of the present invention Figure 2 Enlarged structural diagram at point A;

[0025] Figure 4 This is a side view cross-sectional structural schematic diagram provided in an embodiment of the present invention;

[0026] Figure 5 Provided for embodiments of the present invention Figure 4 Enlarged structural diagram at point B;

[0027] Figure 6 This is a schematic diagram of the internal structure of the headstock provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the shielding component structure provided in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Pump body; 2. Water inlet; 3. Sliding groove; 4. Groove; 5. Shielding component; 6. Expansion sleeve; 7. Cavity; 8. Trigger rod; 9. Connecting rod; 10. Support component; 11. Head seat; 12. Sliding sleeve; 13. Linkage sleeve; 14. Spiral groove; 15. Sliding protrusion; 16. Gear ring; 17. Connecting component; 18. Arc rack; 19. Transmission gear; 20. Elastic torsion component; 21. Retraction groove; 22. Limiting component; 23. Limiting hole; 24. Linkage ring; 25. Linkage pin; 26. Linkage groove; 27. Pulley. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] Please see Figure 1-7 This invention provides a high-efficiency fluid centrifugal pump assembly, including a pump body 1 with a water inlet 2 at the upper end of the pump body 1, and further including: a sliding groove 3 formed on the inner wall of the pump body 1, with a slot 4 corresponding to one end of the water inlet 2; a blocking member 5 movably disposed in the sliding groove 3 for controlling the connection between the water inlet 2 and the slot 4; an expansion sleeve 6 disposed on the blocking member 5; and a thrust assembly disposed in the blocking member 5. When the blocking member 5 completely separates the water inlet 2 from the slot 4, the thrust assembly controls the expansion sleeve 6 to expand and fill the gap between the slot 4 and 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 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 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 is matched with 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, so as to ensure that the shielding member 5 can completely shield 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 exactly to the slot 4, and the size of the expansion and contraction sleeve 6 is matched with 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 "square" 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 and the slot 4 remain connected, that is, the water injection port 2 remains connected to the inside of the pump body 1. Thus, external water injection of 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. With the setting of the expansion and contraction sleeve 6 and the thrust component, while 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 embodiment, the shielding member 5 has a cavity 7, and the thrust assembly includes a trigger rod 8 movably disposed within the cavity 7. The trigger rod 8 is connected to a support member 10 via a hinged connecting rod 9. The support member 10 is fixed to 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 member 5. Specifically, the side of the cavity 7 away from the water inlet 2 is shielded by the expansion sleeve 6, thereby limiting the expansion direction of the expansion sleeve 6 to face the inside of the slot 4. The direction of movement of the trigger rod 8 is consistent with the direction of movement of the shielding member 5. The two ends of the connecting rod 9 are respectively hinged to the trigger rod 8 and the support member 10. The support member 10 is arc-shaped and extends in the same direction as the direction of movement of the shielding member 5. Multiple support members 10 are symmetrically and evenly arranged in a direction perpendicular to the extension direction. The same support member 10 is movably connected to the trigger rod 8 through no less than two connecting rods 9. With the arrangement of multiple support members 10, the shape of the expansion sleeve 6 after expansion can be matched with the inner wall of the pump body 1. When the blocking member 5 completely blocks the slot 4, the end of the trigger rod 8 extending out of the blocking member 5 abuts against the inner wall of the slot 4 to move. At this time, the trigger rod 8 moves the support member 10 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 blocking member 5 retracts into the sliding groove 3, the expansion sleeve 6 elastically contracts, thereby linking one end of the trigger rod 8 to extend out of the blocking member 5 again.

[0036] The use of the expansion sleeve 6 above is to deal with the situation where a large groove is still left on the side near the inner wall of the pump body 1 after the slot 4 is blocked by the blocking part 5. When the thickness of this groove is thin, the use of the expansion sleeve 6 can be omitted.

[0037] In another embodiment of the present invention, a head seat 11 is provided at the upper end of the pump body 1, and a sliding sleeve 12 is movably disposed on the head seat 11. The sliding sleeve 12 is sleeved on the outside of the water inlet 2 and is linked with the blocking member 5 through a linkage component. Specifically, the head seat 11 is used to support the sliding sleeve 12 and its related structures; the sliding sleeve 12 is connected to the water inlet 2 through a keyway, that is, the sliding sleeve 12 only moves axially relative to the water inlet 2; with the linkage component in place, when the sliding sleeve 12 moves downward, the linkage blocking member 5 opens, and when the sliding sleeve 12 moves upward, the linkage blocking member 5 closes.

[0038] As a preferred technical solution of this embodiment, the linkage component includes a linkage sleeve 13 rotatably disposed inside the head base 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 through a bevel gear drive. Specifically, 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. Through the arrangement of the spiral groove 14 and the sliding protrusion 15, the lifting and lowering of the sliding sleeve 12 can directly link the rotation of the linkage sleeve 13. A toothed ring 16 is coaxially sleeved on the lower end of the linkage sleeve 13. An arc-shaped rack 18 movably disposed inside the head base 11 is connected to the shielding member 5 through a connector 17. A transmission gear 19 is rotatably disposed inside the head base 11 and meshes between the toothed ring 16 and the arc-shaped rack 18. The end of the head base 11 furthest from the groove 4 is connected to the connector 17. The extension direction of the arc-shaped rack 18 is consistent with the movement direction of the shielding member 5. In actual use, when the sliding sleeve 12 descends, it drives the sliding protrusion 15 to descend as well. The sliding protrusion 15 and the spiral groove 14 undergo spiral transmission, causing the linkage sleeve 13 to rotate. The linkage sleeve 13 drives the gear ring 16 to rotate, and the gear ring 16 transmits the arc rack 18 through the transmission gear 19. At this time, the movement direction of the arc rack 18 drives the blocking part 5 to retract into the sliding groove 3, thus opening the channel between the water inlet 2 and the inside of the pump body 1. Conversely, when the sliding protrusion 15 rises, it is transmitted through the sliding protrusion 15, spiral groove 14, linkage sleeve 13, gear ring 16, and transmission gear 19. At this time, the movement direction of the arc rack 18 drives the blocking part 5 to move into the slot 4, thus closing the channel between the water inlet 2 and the inside of the pump body 1.

[0039] As a preferred technical solution in this embodiment, the outer side of the linkage sleeve 13 is connected to the inner wall of the head seat 11 via an elastic torsion member 20. The head seat 11 is provided with a limiting component for restricting the movement of the sliding sleeve 12. Specifically, the elastic torsion member 20 is preferably a coil spring, with one end connected to the inner wall of the head seat 11 and the other end connected to the outer wall of the linkage sleeve 13. The elastic torsion member 20 restricts the rotation of the linkage sleeve 13, and the rotation angle of the linkage sleeve 13 under this restriction, through the spiral groove 14 and the sliding protrusion 15, links the sliding sleeve 12 to the highest position within its lifting range, thus ensuring... When the blocking component 5 is in the position of completely blocking the slot 4, the channel between the water inlet 2 and the inside of the pump body 1 remains closed. When the sliding sleeve 12 descends to the lowest position, the limiting component limits the sliding sleeve 12, thereby limiting the blocking component 5 when it is in the position of retracting into the sliding groove 3, thus keeping the channel between the water inlet 2 and the inside of the pump body 1 open. When the limiting component cancels the limiting function, the linkage sleeve 13 rotates back to its original position under the release of the elastic force of the elastic torsion member 20, thereby resetting and raising the sliding sleeve 12, and resetting the blocking component 5 to block the slot 4.

[0040] As a preferred technical solution of this embodiment, the limiting component includes a retraction groove 21 provided on the head base 11, a limiting member 22 elastically and movably provided in the retraction groove 21, and a limiting hole 23 matching the limiting member 22 provided on the sliding sleeve 12. Specifically, the retraction groove 21 guides the limiting member 22, and the guide is arranged radially along the sliding protrusion 15; a spring is provided in the retraction groove 21 to abut against the limiting member 22, so that the limiting member 22 maintains the tendency to extend outward from the retraction groove 21; when the sliding sleeve 12 descends to the lowest position of the lifting range, the limiting hole 23 corresponds to the limiting member 22; when the limiting hole 23 corresponds to the limiting member 22, the limiting member 22 extends into the limiting hole 23 under elastic force; preferably, there are multiple limiting members 22, which are evenly arranged around the circumference of the sliding sleeve 12.

[0041] As a preferred embodiment, a linkage ring 24 is rotatably disposed inside the head base 11, and a linkage pin 25 is fixedly disposed on the limiting member 22. The linkage ring 24 is provided with a linkage groove 26 that matches the linkage pin 25. A lever 27 that slides through the side wall of the head base 11 is provided on one side of the linkage ring 24. Specifically, the linkage ring 24 is sleeved on the outside of the sliding sleeve 12 and is coaxially disposed. The linkage ring 24 is disposed on the upper side of each retraction groove 21. The linkage pin 25 is vertically disposed. The two ends of the linkage groove 26 are positioned at opposite distances from the center of the linkage ring 24. The two ends of the linkage groove 26 correspond to the two ends of the range in which the limiting member 22 drives the linkage pin 25 to move. The linkage ring 24 can switch the two ends of the linkage groove 26 to correspond to the linkage pin 25 by rotation. The lever 27 is used to control the rotation of the linkage ring 24 externally. In practical use, if the sliding sleeve 12 does not fall, the limiting member 22 is fully retracted and located in the retraction groove 21. The linkage pin 25 corresponds to the far end of the sliding groove 3 relative to the center of the linkage ring 24. Then, the sliding sleeve 12 descends to the lowest position, and the limiting member 22 extends out of the retraction groove 21 under elastic force to embed into the limiting hole 23. At the same time, the limiting member 22 drives the linkage pin 25 to move. The linkage pin 25 moves relative to the sliding groove 3 to make the linkage ring 24 rotate. Afterward, by externally pushing the lever 27, the linkage ring 24 is driven to rotate actively. The linkage ring 24 drives the sliding groove 3 to rotate, and the sliding groove 3 controls the movement of the linkage pin 25. The linkage pin 25 then drives the limiting member 22 to move back into the retraction groove 21 until the limiting member 22 leaves the limiting hole 23. The sliding sleeve 12 can automatically move upward and reset according to the above principle. The limiting member 22 is blocked by the outer wall of the sliding sleeve 12 and also remains in the retracted state.

[0042] As a preferred technical solution in this embodiment, 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. Specifically, in actual use, when the external water pipe is connected to the water inlet 2, it is usually necessary to manually hold it to maintain the connection and avoid the reaction force during water injection, which could cause the water pipe to fall off. However, in this embodiment, the water pipe can be automatically locked on the water inlet 2. The end of the limiting member 22 can be provided with raised grooves to generate damping; the gap between the water inlet 2 and the sliding sleeve 12 allows for easy insertion of an external water pipe. Then, during the process of the water pipe moving down to form a connection with the water inlet 2, the water pipe also directly pushes the sliding sleeve 12 down. Thus, through the above principle, the blocking member 5 opens in conjunction, and the limiting member 22 corresponds to the limiting hole 23. Therefore, the limiting member 22 extends into the limiting hole 23 under elastic force, and further extends into the gap between the water inlet 2 and the sliding sleeve 12. At this time, due to the wall of the water pipe... When embedded in this gap, the limiting member 22 can be pressed against the outer wall of the water pipe, thereby automatically maintaining the connection between the water pipe and the water inlet 2 without manual control. In this process, the water inlet 2 and the pump body 1 are automatically connected. In addition, when the toggle member 27 is moved to drive the limiting member 22 to retract and reset, the elastic rotation of the linkage sleeve 13 causes the sliding sleeve 12 to automatically rise and reset. Thus, not only does the blocking member 5 re-sever the channel between the water inlet 2 and the pump body 1, but the water pipe also automatically disengages from the water inlet 2 as the sliding sleeve 12 rises.

[0043] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

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 slot (4) is provided at one end corresponding to the water inlet (2). The slot (4) is opened on the inner wall of the pump body (1). 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); The expansion sleeve (6) is set on the shield (5); the expansion sleeve (6) is elastic and automatically maintains a contracted state under elastic force. When contracted, its outer wall is consistent with the outer wall of the shield (5). When the shield (5) is completely separated between the water inlet (2) and the slot (4), the expansion sleeve (6) corresponds to the slot (4), and the size of the expansion sleeve (6) matches the size of the slot (4). The shape of the outer wall of the expansion sleeve (6) after expansion is close to the shape of the inner wall of the pump body (1). 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). 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).

2. 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.

3. The high-efficiency fluid centrifugal pump assembly according to claim 2, 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.

4. The high-efficiency fluid centrifugal pump assembly according to claim 3, 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).

5. The high-efficiency fluid centrifugal pump assembly according to claim 3, 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).

6. The high-efficiency fluid centrifugal pump assembly according to claim 3, 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).

7. 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).

8. The high-efficiency fluid centrifugal pump assembly according to claim 7, 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).

9. The high-efficiency fluid centrifugal pump assembly according to claim 7, 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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