A centralizer for vertical long-axis pump

Abstract

The present application relates to the technical field of water pump stabilization, and discloses a centralizer for a vertical long-axis pump, comprising an outer sleeve and a plurality of elastic buffer components. The top end of the outer sleeve is welded and fixed to an offshore platform, the outer sleeve cover is arranged on the outside of a water-lifting pipe, and the elastic buffer components are arranged on the outer wall of the water-lifting pipe. The plurality of elastic buffer components are arranged at intervals along the circumference and axis of the water-lifting pipe, and one end of the elastic buffer component abuts the outer wall of the water-lifting pipe, and the other end abuts the inner wall of the outer sleeve. The present application has the function of transmitting the impact force of seawater to the offshore platform by using the outer sleeve, thereby greatly reducing the impact of seawater on the water-lifting pipe. The plurality of elastic buffer components on the outside of the water-lifting pipe are used to position the water-lifting pipe in multiple directions, so that when the wind and waves are large at sea, the water-lifting pipe is less likely to deflect, thereby reducing the vertical long-axis pump from malfunctioning.

Description

Technical Field

[0001] The present application relates to the technical field of water pump stabilization, and in particular to a centralizer for a vertical long-axis pump. Background Art

[0002] Vertical long-shaft pumps, a type of centrifugal pump, are improvements on submersible pumps, resulting in significantly higher performance and greater operational stability. These advanced and mature vertical long-shaft pumps were developed to meet domestic market demand. They can be used to transport liquids below 55°C, including clean water, rainwater, oxidized iron scale water, sewage, corrosive industrial wastewater, and seawater.

[0003] Currently, refer to Figure 1 The vertical long-axis pump includes a water-lifting pipe 13, a drive motor 14, a drive shaft, and an impeller. The water-lifting pipe 13 is composed of multiple pipes with flanges at the ends connected by bolts. The bottom end of the water-lifting pipe 13 is a water suction port, and the top end of the water-lifting pipe 13 is bent horizontally to form a water outlet 15. The drive motor 14 is mounted on the top end of the water-lifting pipe 13, and the drive shaft is mounted on the drive end of the drive motor 14 and is located in the water-lifting pipe 13. The impeller is mounted on the bottom end of the drive shaft, and a filter 16 is installed at the water suction port of the water-lifting pipe 13. The drive motor 14 drives the impeller to rotate via the drive shaft. The impeller draws water from the water inlet into the water-lifting pipe 13, and the water then flows out of the water-lifting pipe 13 from the outlet.

[0004] When a vertical long-shaft pump is used on an offshore platform, the top of the water pipe is located on the platform, while the middle and lower parts of the pipe are immersed in the seawater. The flowing seawater impacts the pipe walls. When the seawater is strong, the impact of the seawater is greatly increased. At this time, the water pipe is easily deflected by the impact of the seawater, causing interference between the impeller and the pipe, which can lead to failure of the vertical long-shaft pump. Summary of the Invention

[0005] In order to improve the problem that a vertical long-shaft pump is prone to failure due to seawater impact, the present application provides a centralizer for a vertical long-shaft pump.

[0006] The present application provides a centralizer for a vertical long-axis pump adopts the following technical solution:

[0007] A centralizer for a vertical long-axis pump includes an outer sleeve and multiple elastic buffer components. The top end of the outer sleeve is welded and fixed to an offshore platform. The outer sleeve cover is arranged on the outside of a water pumping pipe. The elastic buffer components are arranged on the outer wall of the water pumping pipe. Multiple elastic buffer components are arranged at intervals along the circumference and axis of the water pumping pipe, and one end of the elastic buffer component abuts the outer wall of the water pumping pipe, and the other end abuts the inner wall of the outer sleeve.

[0008] By adopting the above technical solution, when a vertical long-shaft pump is used on an offshore platform, an outer sleeve is installed on the outside of the water-lifting pipe. When the sea is rough, the seawater impacts the outer sleeve, which transmits the impact force to the offshore platform, thereby buffering the seawater's impact and significantly reducing the impact of the seawater on the water-lifting pipe. Simultaneously, multiple elastic buffer components on the outside of the water-lifting pipe position the water-lifting pipe in multiple directions, making it less susceptible to shaking. This arrangement ensures that when the sea is rough, the outer sleeve and the multiple elastic buffer components jointly protect the water-lifting pipe, preventing it from deflecting, thereby reducing the risk of failure of the vertical long-shaft pump.

[0009] Preferably, the elastic buffer assembly includes a mounting seat, a sleeve, an elastic member and an abutment member, the mounting seat is arranged on the outer side wall of the water pumping pipe, the sleeve is arranged on the side of the mounting seat close to the outer sleeve, the abutment member is slidably arranged in the sleeve, the end of the abutment member close to the outer sleeve abuts the inner wall of the outer sleeve, the elastic member is arranged in the sleeve, and the two ends of the elastic member abut the mounting seat and the abutment member respectively.

[0010] By adopting this technical solution, when the water pipe shakes, multiple elastic buffer assemblies around the pipe position it. The abutment members of the elastic buffer assemblies abut the inner wall of the outer sleeve. The elastic members act on the water pipe through the mounting seat, thereby squeezing the water pipe in place from the circumference of the pipe, making the pipe more stable. At the same time, when the outer sleeve deflects due to impact, the abutment members slide within the sleeve, making the outer sleeve less likely to affect the water pipe.

[0011] Preferably, the abutment member is a columnar member, and an abutment ring is formed on the outward protrusion of the middle part of the outer wall of the abutment member, the outer wall of the abutment ring abuts the inner wall of the sleeve, the elastic member abuts on the end wall of the abutment ring, and the end of the sleeve close to the outer sleeve is detachably provided with a cover ring, the abutment member passes through the cover ring, and the side wall of the cover ring abuts on the end wall of the abutment ring away from the elastic member.

[0012] By adopting the above technical solution, when installing the abutment, the elastic part is first placed in the sleeve, then the abutment is placed in the sleeve, and finally the cover ring is installed on the end of the sleeve. The elastic part acts on the abutment through the abutment ring, and the cover ring limits the abutment ring, so that the abutment will not slip out of the sleeve.

[0013] Preferably, the mounting seat includes a supporting seat body and an adjusting seat body, the supporting seat body is set on the flange of the water pumping pipe by bolts, the supporting seat body is provided with a waist-shaped hole along the diameter direction of the water pumping pipe, the adjusting seat is slidably set on the supporting seat body, the sleeve is set on the adjusting seat body, and the adjusting seat is provided with a fixing part for fixing the adjusting part on the supporting seat body, and the fixing part is slidably set in the waist-shaped hole along the diameter direction of the water pumping pipe.

[0014] By adopting the above technical solution, when the diameter of the outer sleeve or the water pumping pipe changes, the adjustment seat is slid on the support seat, and the adjustment seat drives the cylinder, the elastic part and the abutment to move. At the same time, the adjustment seat also drives the fixing part to move in the waist-shaped hole, thereby adjusting the distance between the abutment and the water pumping pipe, so that the elastic buffer assembly can be suitable for water pumping pipes and outer sleeves of different models and sizes. After the adjustment seat is completed, the fixing part is used to fix the adjustment seat on the mounting seat.

[0015] Preferably, a through hole connecting the inner cavity of the sleeve and the inner cavity of the outer sleeve is provided on the adjustment seat body.

[0016] By adopting the above technical solution, when the abutment member moves in the sleeve, the seawater in the sleeve is squeezed out of the sleeve through the through hole, thereby facilitating the movement of the abutment member in the sleeve.

[0017] Preferably, the side wall of the support seat body close to the water supply pipe is concave to form a curved wall, and the curved wall of the support seat body fits the outer side wall of the water supply pipe.

[0018] By adopting the above technical solution, the arcuate wall of the support seat fits the water pumping pipe, so that the abutment between the support seat and the water pumping pipe is tighter, thereby making the buffering effect of the elastic buffer component better.

[0019] Preferably, it also includes an inner sleeve, the top end of which is welded and fixed to the offshore platform, the inner sleeve cover is arranged on the outside of the water pumping pipe and located on the inside of the outer sleeve, the sleeve passes through the inner sleeve, and the outer sleeve is provided with multiple water inlets.

[0020] By adopting this technical solution, when the sea is rough, the seawater first impacts the outer sleeve, which partially offsets the impact force. Some seawater then enters the outer sleeve through the water inlet and impacts the inner sleeve. This offsets the impact force, making the water lift pipe less likely to deflect and extending the service life of the outer sleeve. Furthermore, the inner sleeve limits the elastic buffer assembly through the sleeve, thereby limiting the position of the water lift pipe and further improving its stability.

[0021] Preferably, it also includes a pressure relief cylinder arranged on the offshore platform, a buffer chamber is formed between the outer sleeve and the inner sleeve, the bottom end of the pressure relief cylinder is connected to the buffer chamber, a piston is slidably arranged in the pressure relief cylinder, and the air pressure above the piston in the pressure relief cylinder is greater than the air pressure below the piston.

[0022] By adopting this technical solution, when seawater enters the buffer chamber from the water inlet, it is squeezed into the pressure relief cylinder. Once the seawater enters the cylinder, the piston inside the cylinder is pushed upward. When the seawater impacts the piston, the high-pressure gas above the piston pushes the piston downward and resets. This arrangement uses the pressure relief cylinder and piston to relieve pressure, reducing the impact force of the seawater in the buffer chamber and thus reducing the impact of the seawater on the inner casing.

[0023] Preferably, the water inlet of the upper half of the outer sleeve is opened tilted upward along the vertical direction, and the water inlet of the lower half of the outer sleeve is opened tilted downward along the vertical direction.

[0024] By adopting this technical solution, when seawater enters the upward-sloping water inlet on the upper half of the outer casing, it flows upward into the buffer chamber. When seawater enters the downward-sloping water inlet on the lower half of the outer casing, it flows downward into the buffer chamber. This arrangement allows seawater to enter the buffer chamber at an angle, thereby reducing the impact force of seawater on the inner casing.

[0025] Preferably, the inner sleeve is composed of a plurality of sleeve side walls that are abutted and fixed together, the number of the sleeves is the same as the number of elastic buffer components on one circumferential side of the water pumping pipe, and a card groove is provided on the side wall of the sleeve. When the side walls of two sleeves are abutted, the card grooves of the two sleeves clamp and fix the sleeve.

[0026] By adopting the above technical solution, when installing the inner casing, each casing segment is placed between two adjacent elastic buffer components along the circumference of the water supply pipe, and multiple casing segments are combined to form the inner casing. At this time, the grooves of the two adjacent casing segments clamp the casing, thereby limiting the position of the elastic limiting components. This arrangement allows multiple casing segments to form the inner casing, making it easier to install the inner casing.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By using an outer sleeve to transfer the impact force of seawater to the offshore platform, the impact of seawater on the water pump is greatly reduced. Multiple elastic buffer components on the outside of the water pump are used to position the water pump in multiple directions. This prevents the water pump from deflecting when the sea is rough, making the vertical long-axis pump less likely to malfunction.

[0029] 2. By using a support base and an adjustment base, the adjustment base is slid on the support base, and the adjustment base drives the cylinder, elastic member, and abutment member to move, thereby adjusting the distance between the abutment member and the water supply pipe, so that the elastic buffer assembly can be applied to water supply pipes and outer sleeves of different models and sizes;

[0030] 3. By adopting the inner casing, the seawater first impacts the outer casing, which offsets part of the impact force of the seawater. Part of the seawater enters the outer casing from the water inlet and impacts the inner casing. The inner casing offsets part of the impact force of the seawater, making the water pumping pipe less likely to deflect while increasing the service life of the outer casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural diagram of a vertical long-axis pump in the background technology of this application;

[0032] Figure 2 This is a schematic diagram of the overall structure of the centralizer for the vertical long-axis pump in Example 1 of the present application;

[0033] Figure 3 This is a partial structural cross-sectional view of a centralizer for a vertical long-axis pump in Example 1 of the present application;

[0034] Figure 4 This is a schematic diagram of a portion of the structure of the centralizer for the vertical long-axis pump in Example 1 of the present application, highlighting the elastic buffer component;

[0035] Figure 5 This application Figure 4 A in the middle is an enlarged schematic diagram;

[0036] Figure 6 This is a schematic diagram of the overall structure of the centralizer for the vertical long-axis pump in Example 2 of the present application;

[0037] Figure 7 This is a schematic diagram of a portion of the structure of the centralizer for a vertical long-axis pump in Example 2 of the present application, highlighting the inner casing;

[0038] Figure 8 This is a partial structural cross-sectional view of the centralizer used for the vertical long-axis pump in Example 2 of the present application.

[0039] Explanation of the accompanying drawings: 1. Outer sleeve; 2. Elastic buffer assembly; 21. Mounting seat; 211. Support seat body; 212. Adjustment seat body; 22. Sleeve; 23. Elastic member; 24. Abutment member; 3. Abutment ring; 4. Cover ring; 5. Waist-shaped hole; 6. Fixing member; 7. Through hole; 8. Inner sleeve; 81. Sleeve sheet; 9. Water inlet; 10. Pressure relief cylinder; 11. Buffer chamber; 12. Slot; 13. Water lifting pipe; 14. Drive motor; 15. Water outlet; 16. Filter. DETAILED DESCRIPTION

[0040] The following is combined with Figure 2 —8 provides further details of this application.

[0041] The embodiment of the present application discloses a centralizer for a vertical long-axis pump.

[0042] Example 1:

[0043] Reference Figure 2 and 3 A centralizer for a vertical long-shaft pump includes an outer sleeve 1 and twelve elastic buffer components 2. The outer sleeve 1 is mounted on the outside of a water-lifting pipe 13, with the bottom end of the outer sleeve 1 flush with the bottom end of a filter screen. The outer sleeve 1 is coaxially mounted with the water-lifting pipe 13, and the top end of the outer sleeve 1 is welded and fixed to an offshore platform. In this application, the outer sleeve 1 can be a stainless steel sleeve. When the sea is rough, the seawater impacts the outer sleeve 1, which transmits the impact force to the offshore platform, thereby buffering the impact of the seawater and greatly reducing the impact of the seawater on the water-lifting pipe 13.

[0044] Reference Figure 3 and 4 The twelve elastic buffer components 2 are divided into three groups and installed on the flange of the water-lifting pipe 13. Each group of four elastic buffer components 2 is installed on the water-lifting pipe 13 at equal intervals along the circumference of the water-lifting pipe 13. The three groups of elastic buffer components 2 are installed on the water-lifting pipe 13 at intervals along the axial direction of the water-lifting pipe 13. One end of the elastic buffer component abuts the outer wall of the water-lifting pipe 13, and the other end abuts the inner wall of the outer sleeve 1. The twelve elastic buffer components 2 on the outside of the water-lifting pipe 13 position the water-lifting pipe 13 in multiple directions, making it less likely that the water-lifting pipe 13 will shake. The outer sleeve 1 cooperates with the twelve elastic buffer components 2 to protect the water-lifting pipe 13, so that when the wind and waves at sea are large, the water-lifting pipe 13 is less likely to deflect, thereby making the vertical long-axis pump less likely to fail.

[0045] Reference Figure 4 and 5 Specifically, the elastic buffer assembly 2 includes a mounting seat 21, a sleeve 22, an elastic member 23 and abutment 24. The mounting seat 21 is fixedly mounted on the flange of the water pumping pipe 13, and the sleeve 22 is fixedly mounted on the side wall of the mounting seat 21 away from the water pumping pipe 13 along the diameter direction of the water pumping pipe 13. The end of the sleeve 22 away from the mounting seat 21 is detachably fixedly mounted with a cover ring 4 by thread, and the inner diameter of the cover ring 4 is smaller than the inner diameter of the sleeve 22.

[0046] The abutment member 24 is a columnar member that slides through the cover ring 4 along the axis of the sleeve 22. The end of the abutment ring 3, facing away from the mounting seat 21, is hemispherical and abuts the inner sidewall of the outer sleeve 1. The abutment ring 3 is integrally formed in a protruding shape in the middle of the outer wall of the abutment member 24. The outer peripheral sidewall of the abutment ring 3 slides against the inner sidewall of the sleeve 22. The elastic member 23 is mounted within the sleeve 22, with the two axial end walls of the abutment ring 3 abutting the elastic member 23 and the cover ring 4, respectively. In this application, the elastic member 23 can be a spring, and the surface of the spring is coated with a rust-proof coating.

[0047] When the vertical long-axis pump is in operation, the water-lifting pipe 13 itself vibrates. At this time, the twelve abutment members 24 abut the inner wall of the outer sleeve 1. These abutment members 24 act on the mounting seat 21 via the elastic member 23, and the mounting seat 21 acts on the water-lifting pipe 13, thereby reducing the vibration of the water-lifting pipe 13. At the same time, when the outer sleeve 1 deflects due to an impact, the abutment members 24 slide within the sleeve 22, making it less likely that the deflection of the outer sleeve 1 will affect the water-lifting pipe 13.

[0048] Specifically, the mounting base 21 includes a support base 211 and an adjustment base 212. The support base 211 is removably fixed to the flange of the water supply pipe 13 by bolts, and the support base 211 is in contact with the outer wall of the water supply pipe 13. The adjustment base 212 is slidably mounted on the support base 211 along the axis of the water supply pipe 13, and the sleeve 22 is fixedly mounted on the side wall of the adjustment base 212 away from the water supply pipe 13.

[0049] Two waist-shaped holes 5 are formed on the support base 211, and the waist-shaped holes 5 are formed along the diameter direction of the water supply pipe 13. Two fixing members 6 are installed in the adjustment base 212. The fixing members 6 are slidably installed in the waist-shaped holes 5 along the circumferential direction of the water supply pipe 13. In this application, the fixing members 6 can be selected as bolts and nuts. The adjustment base 212 can be fixed to the support base 211 by rotating the fixing members 6. By sliding the adjustment base 212 on the support base 211, the position of the abutment 24 can be adjusted, so that the elastic buffer assembly 2 is suitable for water supply pipes 13 and outer sleeves 1 with different diameters.

[0050] The side wall of the support seat 211 close to the water supply pipe 13 is concave inward toward the direction away from the water supply pipe 13 to form a curved wall, and the curved wall of the support seat 211 is adapted to fit on the outer wall of the water supply pipe 13, so that the contact between the support seat 211 and the water supply pipe 13 is tighter, thereby making the buffering effect of the elastic buffer component 2 better.

[0051] The adjustment seat 212 is provided with two through holes 7, one end of which communicates with the inner cavity of the sleeve 22, and the other end of which communicates with the inner cavity of the outer sleeve 1. When the abutment 24 moves within the sleeve 22, the seawater in the sleeve 22 is squeezed out of the sleeve 22 through the through holes 7, thereby facilitating the sliding of the abutment 24 within the sleeve 22.

[0052] The implementation principle of Example 1 of the present application is as follows: when the wind and waves at sea are large, the seawater impacts the outer sleeve 1, and the outer sleeve 1 transmits the impact force to the offshore platform, thereby blocking the impact of the seawater, so that the impact of the seawater on the water pumping pipe 13 is greatly reduced. Twelve abutments 24 abut the inner wall of the outer sleeve 1, and the abutments 24 act on the mounting seat 21 through the elastic member 23, and the mounting seat 21 acts on the water pumping pipe 13, thereby reducing the vibration of the water pumping pipe 13. At the same time, when the outer sleeve 1 is deflected by the impact, the abutments 24 slide in the sleeve 22, so that the deflection of the outer sleeve 1 is less likely to affect the water pumping pipe 13. The outer sleeve 1 cooperates with the twelve elastic buffer components 2 to protect the water pumping pipe 13, so that when the wind and waves at sea are large, the water pumping pipe 13 is less likely to deflect, thereby making the vertical long-axis pump less likely to malfunction.

[0053] Example 2:

[0054] Reference Figure 6 and 8 The difference between this embodiment and embodiment 1 is that a centralizer for a vertical long-axis pump further includes an inner sleeve 22 and four pressure relief cylinders 10. The inner sleeve 8 is sleeved on the outside of the water pumping pipe 13 and located on the inside of the outer sleeve 1. The length of the inner sleeve 8 is the same as that of the outer sleeve 1. The inner sleeve 8 is coaxially installed with the water pumping pipe 13, and the top end of the inner sleeve 8 is welded and fixed to the seawater platform. In this application, the inner sleeve 8 can be a stainless steel sleeve.

[0055] Reference Figure 7 and 8 The inner sleeve 8 is composed of four sleeve pieces 81, each sleeve piece 81 is located between two circumferentially adjacent elastic buffer components 2 of the water pumping pipe 13, and each sleeve piece 81 is provided with three semicircular grooves 12 on both sides along its own width direction, and the three grooves 12 correspond to the three elastic buffer parts in the axial direction of the water pumping pipe 13.

[0056] When the four sleeve segments 81 abut against each other in the width direction, the inner sleeve 8 is formed. Bolts are used to securely connect the four sleeve segments 81 in sequence. The slots 12 of two adjacent sleeve segments 81 are combined into a circular hole and clamped onto the sleeve 22 of the elastic buffer assembly 2. Once the inner sleeve 8 is installed, the slots 12 of the inner sleeve 8 restrain the sleeve 22, thereby restraining the elastic buffer assembly 2 and further stabilizing the water supply pipe 13, preventing it from shaking.

[0057] Reference Figure 6 and 8 The outer sleeve 1 is provided with multiple water inlets 9 along its own axial direction and circumferential direction. The water inlet 9 on the upper half of the outer sleeve 1 is opened at an upward angle in the vertical direction, and the water inlet 9 on the lower half of the outer sleeve 1 is opened at an downward angle in the vertical direction, and a buffer chamber 11 is formed between the outer sleeve 1 and the inner sleeve 8.

[0058] When the sea is rough, the seawater first impacts the outer casing 1. Some of the seawater enters the buffer chamber 11 through the water inlet 9 and then impacts the inner casing 8. The outer casing 1 offsets some of the seawater's impact force, and the inner casing 8 then offsets some of the seawater's impact force. This prevents the water-lifting pipe 13 from deflecting and increases the service life of the outer casing 1. At the same time, the seawater enters the buffer chamber 11 at an angle through the inclined water inlet 9, thereby reducing the impact force of the seawater on the inner casing 8.

[0059] The pressure relief cylinder 10 is fixedly mounted on the offshore platform, and the bottom end of the pressure relief cylinder 10 is connected to the buffer chamber 11. A piston is slidably mounted in the pressure relief cylinder 10 along its own axis. High-pressure gas is stored in the pressure relief cylinder 10, and the high-pressure gas pushes the piston to the bottom end of the pressure relief cylinder 10.

[0060] When seawater enters the buffer chamber 11 at an angle and upward, the seawater in the upper half of the buffer chamber 11 is squeezed into the pressure relief cylinder 10. The piston in the pressure relief cylinder 10 is pushed upward by the seawater, thereby relieving pressure and reducing the impact force of the seawater in the buffer chamber 11, thereby reducing the impact of the seawater on the inner casing 8. After the seawater impacts, the high-pressure gas above the piston in the pressure relief cylinder 10 pushes the piston down and resets.

[0061] The top of the pressure relief cylinder 10 is equipped with a pressure gauge, a pressure relief valve, and an air filling valve. When the impact of seawater is too strong, the pressure relief valve can release the gas in the pressure relief cylinder 10, thereby preventing the pressure relief cylinder 10 from malfunctioning. The pressure gauge can be used to monitor the air pressure in the pressure relief cylinder 10. When the air pressure is too low, the air filling valve can be used to replenish the pressure relief cylinder 10.

[0062] The implementation principle of Example 2 of the present application is: when the wind and waves at sea are large, the seawater first impacts the outer sleeve 1, and part of the seawater enters the buffer chamber 11 from the water inlet 9 and then impacts the inner sleeve 8. The outer sleeve 1 offsets part of the impact force of the seawater, and the inner sleeve 8 offsets part of the impact force of the seawater, making it less likely for the water pumping pipe 13 to deflect, while increasing the service life of the outer sleeve 1.

[0063] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A centralizer for a vertical long-axis pump, characterized by: The invention comprises an outer sleeve (1) and a plurality of elastic buffer components (2), the top end of the outer sleeve (1) is welded and fixed to the offshore platform, the outer sleeve (1) is covered on the outside of the water lifting pipe (13), the elastic buffer components (2) are arranged on the outer wall of the water lifting pipe (13), the plurality of elastic buffer components (2) are arranged at intervals along the circumference and axis of the water lifting pipe (13), and one end of the elastic buffer component (2) abuts against the outer wall of the water lifting pipe (13), and the other end abuts against the inner wall of the outer sleeve (1); The elastic buffer assembly (2) comprises a mounting seat (21), a sleeve (22), an elastic member (23) and an abutting member (24); the mounting seat (21) is arranged on the outer side wall of the water lifting pipe (13); the sleeve (22) is arranged on a side of the mounting seat (21) close to the outer sleeve (1); the abutting member (24) is slidably arranged in the sleeve (22); the end of the abutting member (24) close to the outer sleeve (1) abuts against the inner wall of the outer sleeve (1); the elastic member (23) is arranged in the sleeve (22), and the two ends of the elastic member (23) abut against the mounting seat (21) and the abutting member (24) respectively; The mounting seat (21) comprises a supporting seat body (211) and an adjusting seat body (212); the supporting seat body (211) is arranged on the flange of the water-lifting pipe (13) by means of bolts; a waist-shaped hole (5) is provided on the supporting seat body (211) along the diameter direction of the water-lifting pipe (13); the adjusting seat body (212) is slidably arranged on the supporting seat body (211); the sleeve (22) is arranged on the adjusting seat body (212); a fixing piece (6) for fixing the adjusting piece on the supporting seat body (211) is provided on the adjusting seat body (212); and the fixing piece (6) is slidably arranged in the waist-shaped hole (5) along the diameter direction of the water-lifting pipe (13).

2. A centralizer for a vertical long-axis pump according to claim 1, characterized in that: The abutment member (24) is a columnar member. An abutment ring (3) is formed on the middle portion of the outer wall of the abutment member (24). The outer wall of the abutment ring (3) abuts against the inner wall of the sleeve (22). The elastic member (23) abuts against the end wall of the abutment ring (3). The end of the sleeve (22) close to the outer sleeve (1) is detachably provided with a cover ring (4). The abutment member (24) passes through the cover ring (4), and the side wall of the cover ring (4) abuts against the end wall of the abutment ring (3) away from the elastic member (23).

3. The centralizer for a vertical long-axis pump according to claim 1, characterized in that: The adjusting seat body (212) is provided with a through hole (7) communicating with the inner cavity of the sleeve (22) and the inner cavity of the outer sleeve (1).

4. A centralizer for a vertical long-axis pump according to claim 1, characterized in that: The side wall of the support seat (211) close to the water pumping pipe (13) is concave to form a curved wall, and the curved wall of the support seat (211) fits the outer side wall of the water pumping pipe (13).

5. The centralizer for a vertical long-axis pump according to claim 1, characterized in that: It also includes an inner sleeve (8), the top end of which is welded and fixed to the offshore platform. The inner sleeve (8) is covered on the outside of the water-lifting pipe (13) and is located on the inside of the outer sleeve (1). The sleeve (22) passes through the inner sleeve (8), and the outer sleeve (1) is provided with a plurality of water inlets (9).

6. A centralizer for a vertical long-axis pump according to claim 5, characterized in that: It also includes a pressure relief cylinder (10) arranged on the offshore platform, a buffer chamber (11) is formed between the outer sleeve (1) and the inner sleeve (8), the bottom end of the pressure relief cylinder (10) is connected to the buffer chamber (11), a piston is slidably arranged in the pressure relief cylinder (10), and the air pressure above the piston of the pressure relief cylinder (10) is greater than the air pressure below the piston.

7. The centralizer for a vertical long-axis pump according to claim 5, characterized in that: The water inlet (9) of the upper part of the outer sleeve (1) is opened in an upwardly inclined manner along the vertical direction, and the water inlet (9) of the lower part of the outer sleeve (1) is opened in an downwardly inclined manner along the vertical direction.

8. The centralizer for a vertical long-axis pump according to claim 5, characterized in that: The inner sleeve (8) is composed of a plurality of sleeve sheets (81) whose side walls are abutted and fixed together. The number of the sleeve sheets (81) is the same as the number of elastic buffer components (2) on one peripheral side of the water pumping pipe (13). A clamping groove (12) is provided on the side wall of the sleeve sheet (81). When the side walls of two sleeve sheets (81) are abutted, the clamping grooves (12) of the two sleeve sheets (81) clamp and fix the sleeve (22).

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