Turbine type efficient hydraulic turbine pump for seawater desalination based on nuclear power

Abstract

The invention relates to the technical field of seawater desalination, and discloses a turbo type efficient hydraulic turbine pump for seawater desalination based on nuclear power, which comprises a turbo type turbine pump, the outer wall of an inlet flange is hermetically communicated with a pressure cabin, a piston piece is slidably connected in the pressure cabin, the inner wall of the inlet flange is fixedly connected with a base ring, and a fixed ring is fixedly connected in the base ring. A plurality of flow guide plates are annularly distributed between the fixed ring and the base ring at equal intervals, empty grooves are formed in the upper portions of the flow guide plates, and expansion plates are rotationally connected into the empty grooves. The pressure cabin and the piston piece cooperatively monitor the water pressure change, when the water pressure is reduced, the piston piece drives the positioning ring to synchronously descend, and limiting of the expansion plate is relieved. After the expansion plate rotates out, the upper area of the flow guide plate is increased, water flow impacts the flow guide inclined face, the flow guide plate is driven to deflect to form a spiral flow guide piece, the water flow inflow angle is accurately corrected to be matched with the turbine blade inlet angle, the cavitation phenomenon is effectively restrained, and it is guaranteed that the turbine type turbine pump is always in the optimal kinetic energy conversion working condition.

Description

Technical Field

[0001] This invention relates to the field of seawater desalination technology, and in particular to a turbine-type high-efficiency hydraulic turbine pump for nuclear power seawater desalination. Background Technology

[0002] Hydraulic turbine pumps are key energy-saving devices in the field of seawater desalination, and their core function is to recover the energy of high-pressure liquids. In the seawater desalination process, they use high-pressure concentrated brine generated by reverse osmosis membrane elements to drive the hydraulic turbine, converting the residual pressure energy of the concentrated brine into mechanical energy, which is then transmitted to the pump end through coaxial transmission, driving the pump body to rotate and pressurize the feed seawater, thereby reducing the energy consumption of the seawater pressurization process and achieving energy-saving goals.

[0003] However, the widely used turbine pumps have design limitations: these devices all have a maximum efficiency point, and can only achieve peak efficiency when the liquid flow rate and pressure are close to this design point. Once the operating conditions deviate from the design values, the turbine efficiency will drop significantly. Seawater desalination plants need to adjust their load according to changes in water demand (such as day-night cycles and seasonal changes), which often results in turbine pumps operating under non-design conditions, and the actual average energy savings are far lower than the theoretical values.

[0004] Especially when the system load (flow rate) decreases, cavitation is easily triggered. This occurs when localized low pressure causes liquid vaporization, forming bubbles. A large number of bubbles occupy the flow channel space, altering the effective flow area and direction of the fluid, and disrupting the streamlined flow of the impeller design. This leads to a sharp drop in equipment head (or output power), efficiency, and flow rate, causing performance curves to become unstable. Simultaneously, the bursting of bubbles impacts and damages the impeller surface. If the turbine pump is shut down for repairs due to damage, the seawater desalination process will be forced to stop, severely limiting the operational flexibility of the desalination plant. Therefore, to protect the equipment, seawater desalination plants sometimes have to avoid operating in low-load ranges or are forced to sacrifice operating efficiency, finding themselves in a dilemma. Summary of the Invention

[0005] Given that existing technologies are prone to cavitation when the system load decreases, which can damage the turbine and reduce the efficiency of seawater desalination, a high-efficiency turbine-type hydraulic turbine pump for nuclear power seawater desalination is proposed.

[0006] Its purpose is to install a pre-rotation mechanism inside the inlet flange, which removes the limit on the expansion plate when the water pressure decreases, changes the force angle of the guide plate when the expansion plate unfolds, and guides the water flow to rotate after the guide plate tilts, so that the water flow is rematched with the flow velocity and direction, and suppresses cavitation.

[0007] The technical solution of this invention is a turbine-type high-efficiency hydraulic turbine pump for nuclear power seawater desalination, including a turbine-type turbine pump, and an inlet flange and an outlet flange disposed on the turbine-type turbine pump. The outer wall of the inlet flange is sealed and connected to a pressure chamber. A piston is slidably connected inside the pressure chamber. Multiple elastic components are connected between the piston and the pressure chamber. A base ring is fixedly connected to the inner wall of the inlet flange. A fixed ring is fixedly connected inside the base ring. Multiple guide plates are distributed in a ring at equal intervals between the fixed ring and the base ring. A connecting shaft is fixedly connected to the upper part of the guide plate. The two ends of the connecting shaft are rotatably connected to the base ring and the fixed ring, respectively. A slot is opened in the upper part of the guide plate. An extension plate is rotatably connected in the slot. The area of ​​the extension plate from the axis to the fixed ring is larger than the area from the axis to the base ring. A guide slope is opened at the upper part of the extension plate. A positioning ring is vertically slidably connected inside the fixed ring. The positioning ring and the piston are connected by a rope, and the positioning ring abuts against the side of the expansion plate.

[0008] Furthermore, the base ring has a flow-guiding slope at the end facing the inlet end of the inlet flange.

[0009] Furthermore, the piston component includes a piston plate, and a piston ring is fixedly connected to the outer edge of the piston plate, the piston ring being in sliding contact with the inner wall of the pressure chamber; Multiple elastic components are distributed in a ring at equal intervals. Each elastic component includes a telescopic rod, and a spring is sleeved on the outside of the telescopic rod. The two ends of the spring are respectively connected and fixed to the two ends of the telescopic rod, and the two ends of the telescopic rod are respectively connected and fixed to the piston plate and the inner wall of the pressure chamber.

[0010] Furthermore, an annular groove is formed on the outer wall of the base ring, and a sealing ring is fitted on the annular groove. The sealing ring is in close contact with the inner wall of the inlet flange, and multiple positioning bolts are connected between one end of the base ring and the inlet flange.

[0011] Furthermore, the expansion plate has a rotation range of 0° to 50°, and the fixing ring has a clearance notch on the side facing the expansion plate.

[0012] Furthermore, a fixing frame is fixedly connected to the inside of the base ring and the upper end of the fixing ring, and a cable tie is fixedly connected to the end of the pressure chamber facing the inlet flange. Both the fixing frame and the cable tie have through holes, and the rope moves through the through holes of the fixing frame and the cable tie.

[0013] Furthermore, the inner wall of the fixing ring is axially fixed with a plurality of protrusions, and the outer wall of the positioning ring is provided with a sliding groove that matches the protrusions.

[0014] Furthermore, multiple movable plates are distributed in a ring at equal intervals within the positioning ring. The movable plates are located below the clearance notch, and a movable shaft is rotatably connected to the upper part of the movable plates. The movable shaft is rotatably connected to the positioning ring.

[0015] Furthermore, a synchronizing rod is fixedly connected to the side of the piston plate away from the inlet flange, and the other end of the synchronizing rod extends movably through to the outside of the pressure chamber, and pressure scales are axially engraved on the outer wall of the synchronizing rod; A fixing seat is fixedly connected to the outer wall of the pressure chamber. The fixing seat is sleeved on the outside of the synchronizing rod, and a fastening bolt is threaded onto the fixing seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The pressure chamber and piston components work together to monitor water pressure changes. When the water pressure decreases, the piston components drive the positioning ring to descend synchronously, releasing the restriction on the expansion plate. After the expansion plate rotates out, it increases the upper area of ​​the guide plate. The water flow impacts the guide slope, driving the guide plate to deflect and form a spiral guide component. This precisely corrects the water flow inflow angle, making it compatible with the turbine blade inlet angle, effectively suppressing cavitation and ensuring that the turbine pump is always in the optimal kinetic energy conversion condition.

[0017] 2. During the deflection of the guide plate, the extension plate will rotate synchronously with the movable plate inside the fixed ring, and the two will always maintain the same tilt direction. This design significantly increases the water flow guiding area, which not only enhances the regularization effect of the water flow, but also further improves the stability and accuracy of the water flow guidance, making the water flow state more in line with the operating requirements of the turbine pump.

[0018] 3. By rotating the fastening bolts, the position of the synchronizing rod can be manually adjusted and locked, thereby fixing the working state of the piston and the guide plate. This function allows the equipment to flexibly adjust the water flow guidance effect under complex and variable water pressure conditions, combining the convenience of automatic adjustment with the flexibility of manual intervention, significantly improving operational reliability and equipment adaptability. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the base ring and sealing ring structure of the present invention; Figure 3 This is a schematic cross-sectional view of the imported flange and pressure chamber structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the pressure chamber of the present invention; Figure 5 This is a schematic diagram of the base ring, fixed ring, and guide plate structure of the present invention; Figure 6 This is a schematic diagram of the expansion plate and positioning ring structure of the present invention; Figure 7 This is a schematic diagram of the flow guide plate and expansion plate structure of the present invention; Figure 8 This is a schematic diagram of the positioning ring and movable plate structure of the present invention; Figure 9 This is a schematic diagram of the inclined unfolded state of the guide plate, extension plate, and movable plate structure of the present invention.

[0020] In the picture: 1. Turbine pump; 2. Inlet flange; 3. Outlet flange; 4. Pressure chamber; 5. Piston components; 51. Piston plate; 52. Piston ring; 6. Elastic components; 61. Telescopic rod; 62. Spring; 7. Base ring; 8. Annular groove; 9. Sealing ring; 10. Fixing ring; 11. Guide plate; 12. Empty groove; 13. Expansion plate; 14. Guide slope; 15. Displacement notch; 16. Positioning ring; 17. Rope; 18. Fixing bracket; 19. Cable tie; 20. Raised strip; 21. Movable plate; 22. Positioning bolt; 23. Synchronizing rod; 24. Fixing seat; 25. Fastening bolt; 26. Pressure scale. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Example 1, referring to Figures 1-7 This invention provides a first embodiment of a high-efficiency turbine pump for nuclear power seawater desalination, comprising a turbine pump 1, an inlet flange 2 and an outlet flange 3 disposed on the turbine pump 1. A pressure chamber 4 is sealed to the outer wall of the inlet flange 2. A piston 5 is slidably connected within the pressure chamber 4. Multiple elastic members 6 are connected between the piston 5 and the pressure chamber 4. A base ring 7 is fixedly connected to the inner wall of the inlet flange 2. A fixing ring 10 is fixedly connected within the base ring 7. Multiple guide plates 1 are distributed in an annular pattern at equal intervals between the fixing ring 10 and the base ring 7. 1. A connecting shaft is fixedly connected to the upper part of the guide plate 11. The two ends of the connecting shaft are rotatably connected to the base ring 7 and the fixed ring 10, respectively. A slot 12 is opened in the upper part of the guide plate 11. An extension plate 13 is rotatably connected in the slot 12. The area from the axis of the extension plate 13 to the side of the fixed ring 10 is larger than the area from the axis of the extension plate 13 to the side of the base ring 7. A guide slope 14 is opened at the upper end of the extension plate 13. A positioning ring 16 is vertically slidably connected in the fixed ring 10. A rope 17 is connected between the positioning ring 16 and the piston 5. The positioning ring 16 abuts against the side of the extension plate 13.

[0023] Specifically, the pressure inside the pressure chamber 4 is synchronized with the pressure inside the inlet pipe. Changes in water pressure cause the piston 5 to move axially within the pressure chamber 4. When the water pressure decreases, the piston 5 moves, causing the positioning ring 16 to descend via the rope 17. After the positioning ring 16 releases its restraint on the expansion plate 13, the expansion plate 13 rotates to the outside of the guide plate 11. When the water flows through the area of ​​the base ring 7, it contacts the guide slope 14 on the expansion plate 13. The impact force of the water flow causes the guide plate 11 to deflect synchronously around the connecting shaft, so that the fixed ring 10, the guide plate 11, and the base ring 7 cooperate to form a complete spiral guide component. Subsequently, the water flows spirally under the combined guidance of the guide plate 11 and the expansion plate 13, thereby changing the flow velocity and direction, correcting the relative inflow angle of the water flow, ensuring that the direction of water flow matches the inlet angle of the turbine blades of the turbine pump 1, and ensuring that the turbine pump 1 maintains optimal kinetic energy conversion conditions.

[0024] This invention can automatically adjust the flow guiding structure according to changes in water pressure in the inlet pipe without manual intervention, achieving dynamic optimization of the water flow state. By correcting the relative inflow angle of the water flow, it can maintain the adaptability of the water flow and turbine blades under low load conditions, reduce the probability of cavitation, and effectively alleviate the efficiency decline problem of traditional turbine pumps under off-design conditions. At the same time, it reduces the risk of impeller damage, extends the service life of equipment, and improves the stability and flexibility of nuclear power seawater desalination system operation.

[0025] It should be noted that, refer to Figure 3 The connection port between the pressure chamber 4 and the inlet flange 2 is located above the base ring 7. The water pressure inside the pressure chamber 4 is synchronized with the water pressure in the inlet pipe, and it works in conjunction with the piston component 5 to monitor water pressure changes.

[0026] Reference Figure 3 The base ring 7 has a flow-guiding slope at one end facing the inlet end of the inlet flange 2.

[0027] Specifically, when water flows into the base ring 7, the guide slope at the inlet end of the base ring 7 can pre-sort the water flow, reduce initial turbulence, and improve the stability of the water flow after it enters.

[0028] Reference Figure 3 , Figure 4 The piston component 5 includes a piston plate 51, and a piston ring 52 is fixedly connected to the outer circumference of the piston plate 51. The piston ring 52 slides in contact with the inner wall of the pressure chamber 4. Multiple elastic components 6 are distributed in a ring at equal intervals. Each elastic component 6 includes a telescopic rod 61. A spring 62 is sleeved on the outer side of the telescopic rod 61. The two ends of the spring 62 are respectively connected and fixed to the two ends of the telescopic rod 61, and the two ends of the telescopic rod 61 are respectively connected and fixed to the piston plate 51 and the inner wall of the pressure chamber 4.

[0029] Specifically, the piston plate 51 and piston ring 52 cooperate to separate the pressure chamber 4, preventing water from overflowing through the pressure chamber 4. Under the action of water pressure, the piston 5 will slide away from the inlet flange 2. The spring element 6 is set to counteract the thrust of the water pressure. When the water pressure changes, the spring element 6 drives the piston 5 to move adaptively. When the water pressure decreases, the elastic force of the spring element 6 is greater than the water pressure, and the piston 5 moves to the left in the pressure chamber 4; when the water pressure increases, the elastic force of the spring element 6 is less than the water pressure, and the piston 5 moves to the right in the pressure chamber 4.

[0030] Reference Figure 2 An annular groove 8 is provided on the outer wall of the base ring 7, and a sealing ring 9 is fitted on the annular groove 8. The sealing ring 9 is in close contact with the inner wall of the inlet flange 2, and multiple positioning bolts 22 are connected between one end of the base ring 7 and the inlet flange 2.

[0031] Specifically, the base ring 7 achieves a sealed connection with the inner wall of the inlet flange 2 through its cooperation with the sealing ring 9. A threaded groove adapted to the positioning bolt 22 is pre-cut on the inner wall of the inlet flange 2. After the positioning bolt 22 passes through the base ring 7, it is threadedly connected to the corresponding threaded groove, thereby completing the fixation of the base ring 7 and the inlet flange 2. This design can solve the cavitation problem caused by water pressure reduction at the lowest cost without changing the existing equipment structure. At the same time, it is simple to disassemble and assemble, and facilitates subsequent maintenance.

[0032] Reference Figures 6-8 The expansion plate 13 has a rotation range of 0° to 50°, and the fixing ring 10 has a clearance notch 15 on the side facing the expansion plate 13.

[0033] Specifically, under conditions where the water pressure does not decrease, the upper end of the positioning ring 16 restricts the expansion plate 13, causing the expansion plate 13 to be housed in the empty groove 12. When the water pressure decreases, the positioning ring 16 descends and removes the restriction on the expansion plate 13. Since the gravity on the side of the expansion plate 13 facing the fixed ring 10 is greater than that on the other side, the expansion plate 13 rotates into the corresponding clearance notch 15 under the action of gravity. At this time, the total area of ​​the upper part of the guide plate 11 connecting shaft and the expansion plate 13 is greater than the area of ​​the lower part of the guide plate 11 connecting shaft. When the water flows through the guide slope 14, it pushes the expansion plate 13 and the guide plate 11 to rotate until the expansion plate 13 contacts the clearance notch 15. The guide plate 11 is set at a certain angle to the water flow direction, and the water flows through it moves in a spiral after being guided by the guide plate 11.

[0034] The state switching of the extension plate 13 is automatically controlled by water pressure changes to achieve adaptive adjustment of the water flow pattern; the spiral water flow design can improve the kinetic energy utilization efficiency of the water flow, and at the same time, with the help of the synergistic effect of gravity and water flow thrust, the stability and reliability of the structural movement are guaranteed.

[0035] When the turbine pump 1 returns to its optimal operating condition, the high water pressure causes the piston 5 to drive the positioning ring 16 to rise. The upper end of the positioning ring 16 slides into contact with the inclined surface of the expansion plate 13, pushing the expansion plate 13 to rotate in the opposite direction and confining the expansion plate 13 within the empty groove 12. At this time, since the lower area of ​​the guide plate 11 is larger than the upper area of ​​the guide plate 11, the guide plate 11 is set parallel to the water flow and does not pre-rotate to guide the water flow, thus not affecting the optimal inflow angle of the water flow under normal operating conditions.

[0036] Reference Figure 4 , Figure 5 A fixing frame 18 is fixedly connected to the inside of the base ring 7 and the upper end of the fixing ring 10. A cable tie 19 is fixedly connected to the end of the pressure chamber 4 facing the inlet flange 2. Both the fixing frame 18 and the cable tie 19 have through holes, and the rope 17 moves through the through holes of the fixing frame 18 and the cable tie 19.

[0037] Specifically, the fixing frame 18 and the cable tie frame 19 together limit the rope 17. When the piston 5 moves with the change of water pressure, it can keep the rope 17 at the optimal tension angle, thereby stably driving the positioning ring 16 to achieve synchronous movement.

[0038] Example 2, refer to Figure 8 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a plurality of protrusions 20 are fixedly provided axially on the inner wall of the fixing ring 10, and a sliding groove adapted to the protrusions 20 is provided on the outer wall of the positioning ring 16.

[0039] Specifically, the protrusion 20 cooperates with the corresponding groove to make the positioning ring 16 slide straight along the axial direction of the fixing ring 10.

[0040] Reference Figure 8 , Figure 9 The positioning ring 16 contains multiple movable plates 21 arranged in a ring at equal intervals. The movable plates 21 are located below the clearance notch 15. The upper part of the movable plates 21 is rotatably connected to a movable shaft, which is rotatably connected to the positioning ring 16.

[0041] Specifically, the movable plate 21 works similarly to the guide plate 11. When the water pressure is not reduced, the movable plate 21 is set parallel to the water flow. After the water pressure is reduced, the extension plate 13 rotates into the clearance notch 15 and then deflects, and contacts the upper end of the movable plate 21, so that the movable plate 21 deflects synchronously with the guide plate 11, thereby further increasing the guiding area of ​​the water flow.

[0042] The coordinated action of the movable plate 21 and the guide plate 11 significantly increases the water flow guiding area and improves the water flow guiding effect. At the same time, the linkage design of the movable plate 21 makes the overall structure more flexible in adjusting the water flow state, and can adapt to the water flow control requirements under different water pressure conditions. The rest of the structure is the same as that in Embodiment 1.

[0043] Example 3, referring to Figure 4 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that: a synchronizing rod 23 is fixedly connected to the side of the piston plate 51 away from the inlet flange 2, and the other end of the synchronizing rod 23 extends movably through to the outside of the pressure chamber 4. A pressure scale 26 is axially engraved on the outer wall of the synchronizing rod 23. A fixing seat 24 is fixedly connected to the outer wall of the pressure chamber 4. The fixing seat 24 is sleeved on the outside of the synchronizing rod 23, and a fastening bolt 25 is threaded on the fixing seat 24.

[0044] Specifically, when the piston 5 moves with changes in water pressure, the operator can intuitively monitor the water pressure changes within the inlet flange 2 through the displacement of the synchronizing rod 23 and the pressure scale 26. When water pressure changes frequently or is unstable, the position of the synchronizing rod 23 can be manually adjusted, and the fastening bolt 25 can be rotated to ensure tight contact with the synchronizing rod 23, thereby manually fixing the position of the piston 5 and achieving manual control of the angle of the guide plate 11. The cooperation between the pressure scale 26 and the synchronizing rod 23 enables visual monitoring of water pressure changes, facilitating real-time monitoring of the operating conditions. The manual adjustment function improves the adaptability of the equipment, allowing flexible control of the water flow guidance state under complex water pressure conditions, enhancing the convenience and reliability of operation.

[0045] A sliding gap is provided between the synchronizing rod 23 and the fixed seat 24. This gap is used to keep the air pressure inside the pressure chamber 4 synchronized with the outside air when the piston 5 moves, so as to avoid the air pressure interfering with the movement of the piston 5. The pressure scale 26 is calibrated based on the displacement of the synchronizing rod 23. The displacement parameter of the synchronizing rod 23 is pre-converted into the corresponding pressure value and marked as a scale. Therefore, the actual displacement of the synchronizing rod 23 can be intuitively read through the pressure scale 26 to read the corresponding pressure data, realizing a visual correspondence between displacement and pressure. The rest of the structure is the same as that of Embodiment 2.

[0046] Based on embodiments 1-3, the working principle of the present invention is as follows: when the water pressure decreases, the elastic element 6 drives the piston element 5 to move to the left. The piston 5 is connected to the positioning ring 16 inside the fixed ring 10 via the rope 17. The decrease in water pressure causes the positioning ring 16 to descend, releasing the restriction on the expansion plate 13 inside the slot 12 on the guide plate 11. Due to the difference in gravity, the expansion plate 13 rotates to the clearance notch 15 of the fixed ring 10. The water flow impacts the guide slope 14 of the expansion plate 13, causing the guide plate 11 to deflect around the connecting shaft, forming a spiral guide with the base ring 7 and the fixed ring 10. This guides the water flow in a spiral manner, corrects the relative inflow angle of the water flow, and adapts it to the inlet angle of the turbine blades of the turbine pump 1, maintaining the optimal kinetic energy conversion conditions and reducing cavitation. When the water pressure is restored, the piston 5 drives the positioning ring 16 to rise, pushing the extension plate 13 back into the empty slot 12. The guide plate 11 is parallel to the water flow, without affecting normal operation. The entire process requires no manual intervention, achieving dynamic optimization of the water flow and improving the stability of equipment operation.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high-efficiency turbine pump for seawater desalination in nuclear power plants, comprising a turbine pump (1), and an inlet flange (2) and an outlet flange (3) disposed on the turbine pump (1), characterized in that, The outer wall of the inlet flange (2) is sealed and connected to a pressure chamber (4). A piston (5) is slidably connected inside the pressure chamber (4). Multiple elastic components (6) are connected between the piston (5) and the pressure chamber (4). A base ring (7) is fixedly connected to the inner wall of the inlet flange (2). A fixed ring (10) is fixedly connected inside the base ring (7). Multiple guide plates (11) are distributed in a ring at equal intervals between the fixed ring (10) and the base ring (7). A connecting shaft is fixedly connected to the upper part of the guide plate (11). The two ends of the connecting shaft are rotatably connected to the base ring (7) and the fixed ring (10) respectively. A slot (12) is opened on the upper part of the guide plate (11). An extension plate (13) is rotatably connected inside the slot (12). The area from the axis of the extension plate (13) to the side of the fixed ring (10) is greater than the area from the axis of the extension plate (13) to the side of the base ring (7). A guide slope (14) is opened at the upper end of the extension plate (13). A positioning ring (16) is vertically slidably connected inside the fixing ring (10). The positioning ring (16) and the piston (5) are connected by a rope (17), and the positioning ring (16) abuts against the side of the expansion plate (13).

2. The turbine-type high-efficiency hydraulic turbine pump for nuclear power seawater desalination according to claim 1, characterized in that, The base ring (7) has a flow-guiding slope at one end facing the inlet end of the inlet flange (2).

3. The turbine-type high-efficiency hydraulic turbine pump for nuclear power seawater desalination according to claim 1, characterized in that, The piston component (5) includes a piston plate (51), and a piston ring (52) is fixedly connected to the outer circumference of the piston plate (51). The piston ring (52) slides in contact with the inner wall of the pressure chamber (4). Multiple elastic components (6) are distributed in a ring at equal intervals. Each elastic component (6) includes a telescopic rod (61). A spring (62) is sleeved on the outside of the telescopic rod (61). The two ends of the spring (62) are respectively connected and fixed to the two ends of the telescopic rod (61). The two ends of the telescopic rod (61) are respectively connected and fixed to the piston plate (51) and the inner wall of the pressure chamber (4).

4. The turbine-type high-efficiency hydraulic turbine pump for nuclear power seawater desalination according to claim 1, characterized in that, An annular groove (8) is provided on the outer wall of the base ring (7), and a sealing ring (9) is fitted on the annular groove (8). The sealing ring (9) is in close contact with the inner wall of the inlet flange (2), and multiple positioning bolts (22) are connected between one end of the base ring (7) and the inlet flange (2).

5. The turbine-type high-efficiency hydraulic turbine pump for nuclear power seawater desalination according to claim 1, characterized in that, The expansion plate (13) has a rotation range of 0° to 50°, and the fixing ring (10) has a clearance notch (15) on the side facing the expansion plate (13).

6. The turbine-type high-efficiency hydraulic turbine pump for nuclear power seawater desalination according to claim 1, characterized in that, A fixing frame (18) is fixedly connected to the inside of the base ring (7) and the upper end of the fixing ring (10). A wire harness (19) is fixedly connected to the end of the pressure chamber (4) facing the inlet flange (2). Both the fixing frame (18) and the wire harness (19) have through holes. The rope (17) moves through the through holes of the fixing frame (18) and the wire harness (19).

7. The turbine-type high-efficiency hydraulic turbine pump for nuclear power seawater desalination according to claim 1, characterized in that, The inner wall of the fixing ring (10) is axially fixed with a plurality of protrusions (20), and the outer wall of the positioning ring (16) is provided with a sliding groove that matches the protrusions (20).

8. The turbine-type high-efficiency hydraulic turbine pump for nuclear power seawater desalination according to claim 5, characterized in that, The positioning ring (16) contains a number of movable plates (21) arranged in a ring at equal intervals. The movable plates (21) are located below the clearance notch (15). The upper part of the movable plates (21) is rotatably connected to a movable shaft, which is rotatably connected to the positioning ring (16).

9. The turbine-type high-efficiency hydraulic turbine pump for nuclear power seawater desalination according to claim 3, characterized in that, The piston plate (51) is fixedly connected to a synchronizing rod (23) on the side away from the inlet flange (2). The other end of the synchronizing rod (23) extends movably through to the outside of the pressure chamber (4), and pressure scales (26) are axially engraved on the outer wall of the synchronizing rod (23). The outer wall of the pressure chamber (4) is fixedly connected to a fixing seat (24), the fixing seat (24) is sleeved on the outside of the synchronizing rod (23), and a fastening bolt (25) is threaded on the fixing seat (24).

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