A multiphase flow pump

Abstract

The application provides a multiphase flow pump and relates to the technical field of pumping devices.The application comprises a pump body, a pump base arranged in the pump body, water inlets and outlets respectively communicated with the bottom and side of the pump base, a pump cover arranged on the pump body, a maintenance shell arranged on the pump body, a running assembly slidingly arranged in the maintenance shell and the pump body, a pressing base, two plug-in plates arranged on the bottom of the pressing base, an impeller rotatably arranged on the bottom of the pressing base, a transmission assembly arranged in the pump body, a supporting ring, a sleeve rotatably arranged on the bottom of the supporting ring, and a plug-in groove arranged on the pump base and corresponding to the plug-in plate; a motor shaft of a motor extends into the pump cover and has a bottom end in the shape of a regular prism, a sleeve inner hole is matched with the bottom of the motor shaft, and the sleeve is sleeved on the bottom of the motor shaft; a plug-in sleeve coaxially connected with the impeller is rotatably arranged on the top of the pressing base, and the plug-in sleeve is movably plugged into the sleeve; the supporting ring is arranged on the periphery of the motor shaft, and a driving assembly for driving the supporting ring to ascend and descend is arranged on the pump body.The application can replace the impeller without disassembling the multiphase flow pump, thereby reducing the influence on the pipeline conveying operation.

Description

Technical Field

[0001] This invention relates to the field of pumping equipment technology, and specifically to a multiphase flow pump. Background Technology

[0002] In simple terms, a multiphase flow pump is a special type of pump designed to simultaneously transport two or more different forms of media (such as liquid + gas, liquid + solid). It breaks the limitation of traditional pumps that can only transport a single phase (usually liquid). Its core advantage is that it can mix media of different phases together for transport without separating them.

[0003] In the existing technology, during the process of transporting media, multiphase flow pumps may experience impeller wear or the accumulation of debris after a certain operating cycle due to solid particles in the fluid or the weak corrosiveness of the fluid itself. This can lead to problems such as the multiphase flow pump not discharging water, insufficient flow, and generating noise and vibration. It is necessary to disassemble the multiphase flow pump for impeller repair and maintenance. The operation steps and procedures are not only cumbersome and complicated, but also time-consuming, which affects the fluid transport in the pipeline. Summary of the Invention

[0004] The purpose of this invention is to develop a multiphase flow pump that allows for impeller replacement without disassembling the pump, thereby reducing the impact on pipeline transportation operations.

[0005] This invention is achieved through the following technical solution:

[0006] A multiphase flow pump, comprising:

[0007] Pump body;

[0008] Pump base, located inside the pump body;

[0009] The inlet and outlet are connected to the bottom and side of the pump base, respectively;

[0010] Pump cover, located on the pump body;

[0011] The bracket is mounted on the pump cover;

[0012] The motor is mounted on a bracket;

[0013] The maintenance housing is located on the pump body;

[0014] Operating components, slidably disposed within the maintenance housing and pump body, include:

[0015] Pressing seat;

[0016] Two insert plates are located at the bottom of the pressure base;

[0017] The impeller is rotatably mounted at the bottom of the pressure base;

[0018] The transmission assembly, which is vertically and retractably mounted within the pump body, includes:

[0019] Support ring;

[0020] The sleeve is rotatably positioned at the bottom of the support ring;

[0021] The pump base is provided with a slot corresponding to the insertion plate, and the insertion plate and the slot are on the trajectory of the operating components sliding in the maintenance shell and the pump body;

[0022] The motor shaft of the motor extends into the pump cover and its bottom end is in the shape of a regular prism. The inner hole of the sleeve is adapted to the bottom of the motor shaft, and the sleeve is fitted onto the bottom of the motor shaft.

[0023] The top of the pressure seat is rotatably provided with a plug-in cylinder coaxially connected to the impeller, and the plug-in cylinder is movably plugged into the sleeve;

[0024] The support ring is located around the motor shaft, and the pump body is equipped with a drive assembly that drives the support ring to rise and fall.

[0025] Optionally, an L-shaped sliding rod is provided at each of the four corners of the top two sides of the pressure seat near the maintenance shell and the inner wall of the pump body. The sliding rod includes a vertical section connected to the top of the pressure seat and a horizontal section connected to the top of the vertical section.

[0026] The inner wall of the maintenance shell and the pump body is provided with a sliding groove that slides in conjunction with the horizontal section of the sliding rod. The horizontal sections of the four sliding rods at the top of the pressure seat slide in the corresponding sliding grooves respectively. The two ends of the sliding grooves extend to the two ends of the maintenance shell respectively. The two ends of the maintenance shell are threadedly connected to end caps. The center of the end cap is provided with a slot hole that mates with an internal hex wrench.

[0027] Optionally, a vertically arranged lifting groove is provided at the bottom of the slide groove above the pump base. The upper section of the lifting groove is a diameter reduction section, which gradually decreases in size from top to bottom. The bottom size of the diameter reduction section is adapted to the outer diameter of the horizontal section of the slide rod. The top of the diameter reduction section is connected to the slide groove. The lower section of the lifting groove is a positioning guide section, and the size of the positioning guide section is adapted to the outer diameter of the horizontal section of the slide rod.

[0028] Optionally, the lower part of the lifting groove is provided with a vertically lifting push block. The push block is slidably connected to the inner wall of the pump body where the lifting groove is located. The lifting range of the push block covers the entire lifting groove area. The top surface of the push block is shaped to match the trajectory of the slide groove. When the push block slides up to the top of the lifting groove, the top surface of the push block is flush with the bottom surface of the slide groove and the trajectory is matched.

[0029] Optionally, vertically arranged slide rails are provided on the inner walls of the pump body on both sides of the lifting groove, and a slider that is slidably connected to the slide rail is provided on the push block. A horizontally arranged support plate is provided on the inner wall of the pump body below the push block, and two vertically arranged first spring telescopic rods are provided between the support plate and the bottom of the push block.

[0030] Optionally, the two side walls of the slot have a sloping structure with their bottoms close to each other, and the side wall of the slot near the inside of the pump seat is also provided with a step. The steps on the two side walls of the slot protrude in the direction of closeness to each other. The shape of the insert plate is adapted to the slot. The two side walls of the insert plate are sloping and the corresponding positions on the two side walls are provided with step grooves that cooperate with the steps.

[0031] Optionally, the bottom of the slot is provided with a recessed first sealing groove, and two recessed second sealing grooves are provided on the two side walls of the slot respectively. The two second sealing grooves extend downward to the bottom of the slot and merge into the first sealing groove. The surface of the pump seat top opening that contacts the pressure seat is provided with a recessed third sealing groove. The end of the third sealing groove communicates with the two second sealing grooves on the side wall of the slot at the corresponding position.

[0032] The bottom of the insert plate is provided with a first sealing flange that is adapted to the first sealing groove. Two second sealing flanges that extend downward and connect to the first sealing flange are respectively provided on the two side walls of the insert plate. The two second sealing flanges are adapted to the two second sealing grooves. The bottom of the pressure seat is provided with a third sealing flange that is adapted to the third sealing groove. The end of the third sealing flange is connected to the two second sealing flanges on the side wall of the insert plate at the corresponding position.

[0033] Each of the first sealing flange, the second sealing flange, and the third sealing flange is provided with a sealing gasket layer.

[0034] Optionally, the bottom of the sleeve is coaxially connected to an upper drive shaft, the bottom of the upper drive shaft is coaxially connected to a lower drive shaft, a coupling is provided between the upper drive shaft and the lower drive shaft, and a plug hole is coaxially opened at the top of the plug sleeve, the plug hole being adapted to the lower drive shaft;

[0035] The lower drive shaft is provided with a plurality of locking blocks arranged at equal intervals in its circumferential direction. The locking blocks are arranged radially along the lower drive shaft and slide elastically in the radial direction of the lower drive shaft. The locking blocks are arc-shaped. The inner wall of the insertion hole is provided with locking slots whose number, position and size correspond to the locking blocks.

[0036] Optionally, a pressure ring is provided above the support ring and located around the motor shaft. Multiple guide posts are vertically provided on the top of the pressure ring. A guide sleeve that slides with the multiple guide posts is provided at the corresponding position on the bottom of the pump cover. Multiple second spring telescopic rods are vertically provided between the pressure ring and the support ring.

[0037] The outer wall of the pressure ring is provided with a plurality of connecting rods. The connecting rods are arranged at equal intervals in the circumferential direction of the pressure ring. The connecting rods are inclined and their higher ends are connected to the outer wall of the pressure ring. The lower ends of the plurality of connecting rods are connected to a first ring-shaped elastic element. At least one second ring-shaped elastic element is also provided inside the first elastic element. A connecting rod is connected between the second elastic element and the connecting rod.

[0038] The drive assembly includes a base mounted on a connecting rod, on which a vertically arranged drive screw is rotatably connected. The top end of the drive screw extends out of the pump cover, and the drive screw is threadedly engaged with the pump cover. Multiple drive screws are provided, and the multiple drive screws are arranged at equal intervals around the motor shaft in a circular trajectory.

[0039] Optionally, both the first elastic element and the second elastic element include a top ring and a bottom ring in a coaxial state. The top ring is located above the bottom ring, and a plurality of third spring telescopic rods are vertically arranged between the top ring and the bottom ring. The third spring telescopic rods are arranged at equal intervals in the circumferential direction of the top ring and the bottom ring.

[0040] Both the first elastic element and the second elastic element are coaxial with the pressure ring and disposed on the same plane. The top ring of the first elastic element is connected to the lower end of a plurality of connecting rods, and the top ring of the second elastic element is connected to a connecting rod.

[0041] The beneficial effects of this invention are:

[0042] Significantly reduces the operation steps and time required for impeller replacement within the pump. The pump does not need to be disassembled, and impeller replacement can be completed quickly to reduce the impact on fluid transportation operations, reduce pipeline transportation downtime, and allow the pipeline to be put into transportation as soon as possible. It is especially suitable for pipeline transportation of fluids with low pressure. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a structural diagram of the present invention;

[0045] Figure 2 A structural diagram of the pump base, operating components, and transmission components used to maintain the casing and pump body;

[0046] Figure 3 This is a schematic diagram of the transmission assembly.

[0047] Figure 4 for Figure 3 Top view of the intermediate pressure ring, connecting rod, and top rings of the first and second elastic elements;

[0048] Figure 5 A schematic diagram showing the structure of the sliding groove and sliding rod inside the housing and pump body;

[0049] Figure 6This is a schematic diagram of the structure in which the push block, lifting groove, and sliding rod cooperate;

[0050] Figure 7 This is a schematic diagram of the structure of the lower drive shaft and the connector sleeve.

[0051] Reference numerals: 1. Pump body; 2. Pump cover; 3. Motor; 4. Bracket; 5. Maintenance housing; 6. End cover; 7. Motor shaft; 8. Pressure seat; 9. Insert plate; 10. Slide rod; 11. Impeller; 12. Pump base; 13. Slot; 14. Drive screw; 15. Pressure ring; 16. Guide column; 17. Guide sleeve; 18. Connecting rod; 19. Second spring telescopic rod; 20. Support ring; 21. Sleeve; 22. Upper drive shaft; 23. Coupling; 24. Lower drive shaft; 25. Top ring; 26. Bottom ring; 27. Third spring telescopic rod; 28. Slide groove; 29. ​​Lifting groove; 30. Push block; 31. First spring telescopic rod; 32. Support plate; 33. Locking block; 34. Inserting sleeve; 35. Locking groove. Detailed Implementation

[0052] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0055] like Figures 1 to 7 As shown, the present invention discloses a multiphase flow pump, including a pump body 1, a pump chamber inside the pump body 1, an inlet communicating with the bottom of the pump chamber and an outlet communicating with the side of the pump chamber respectively on both sides of the pump body 1, a pump cover 2 on the top of the pump body 1, a bracket 4 on the top of the pump cover 2, a motor 3 on the bracket 4, and a motor shaft 7 of the motor 3 passing through the pump cover 2 and entering the pump body 1, and the motor shaft 7 and the pump cover 2 are rotated and sealed.

[0056] The pump body 1 is provided with a maintenance shell 5. The maintenance shell 5 is in the shape of an arc-shaped cylinder and is connected to the pump cavity. The inside of the maintenance shell 5 has an arc-shaped sliding cavity. The middle part of the maintenance shell 5 is connected to the pump body 1, so that the maintenance shells 5 on both sides of the pump body 1 are symmetrical. The ends of the maintenance shells 5 on both sides of the pump body 1 are threadedly connected with end caps 6. The end caps 6 have a slot at the center that mates with an internal hex wrench.

[0057] The pump chamber is equipped with a pump base 12, which has an opening at the top. The inlet and outlet are connected to the bottom and side of the pump base 12, respectively. The impeller 11 rotates inside the pump base 12. The maintenance shell 5 and the pump body 1 are equipped with a rotating component. The rotating component can slide between the pump body 1 and the maintenance shell 5. When the rotating component slides onto the pump base 12 at the pump body 1, the rotating component can seal with the pump base 12, and the inside of the pump base 12 is sealed.

[0058] The operating assembly includes a pressure seat 8 whose shape is adapted to the top opening of the pump base 12. An impeller 11 is rotatably mounted on the bottom of the pressure seat 8. Insert plates 9 connected to the pressure seat 8 are respectively provided on both sides of the impeller 11 near the maintenance housing 5. Two slots 13 that mate with the two insert plates 9 are provided on the corresponding positions on the pump base 12. The insert plates 9 and slots 13 are all on the trajectory of the operating assembly sliding within the maintenance housing 5 and the pump body 1. The inner wall shape of the insert plate 9 is adapted to the inner wall shape of the pump body 1. After the insert plate 9 is vertically inserted into the slot 13, the insert plate 9 and the slot 13 are sealed, and the bottom of the pressure seat 8 is sealed with the top of the pump base 12, so that a sealed space is formed inside the pump base 12. The impeller 11 rotates to transport fluid. The fluid enters the pump base 12 through the bottom of the pump base 12 from the inlet and is then output from the outlet on the side of the pump base 12.

[0059] The two side walls of slot 13 have a sloping structure with their bottoms approaching each other. The projection of slot 13 onto a vertical plane perpendicular to the sliding trajectory of the operating component is an isosceles trapezoidal shape. A step is also provided on the side wall of slot 13 near the interior of pump base 12, and the steps on the two side walls of slot 13 protrude in the direction of approaching each other. The shape of insert plate 9 is adapted to slot 13. After inserting into slot 13, insert plate 9 completely seals slot 13. Therefore, the two side walls of insert plate 9 are also sloping, and corresponding step grooves are provided on the side walls to mate with the steps. A recessed first sealing groove is provided at the bottom of slot 13. Two recessed second sealing grooves are provided on each side wall of slot 13. The two second sealing grooves are located on the step and on the side wall of slot 13 at the side of the step, respectively. The two second sealing grooves extend downwards to the bottom of slot 13 and merge into the first sealing groove. The bottom of the insert plate 9 is provided with a first sealing flange that is adapted to the first sealing groove. Two second sealing flanges that extend downward and connect to the first sealing flange are respectively provided on the two side walls of the insert plate 9. The two second sealing flanges are adapted to the two second sealing grooves. After the insert plate 9 is inserted into the slot 13, the first sealing flange and the two second sealing flanges are respectively inserted into the first sealing groove and the two second sealing grooves, which increases the contact area between the insert plate 9 and the slot 13. While enhancing the sealing performance, the insert plate 9 is firmly placed in the slot 13.

[0060] The pump seat 12 has a recessed third sealing groove on the surface of the top opening that contacts the pressure seat 8. The end of the third sealing groove is connected to two second sealing grooves on the side wall of the slot 13 at the corresponding position. The bottom of the pressure seat 8 is provided with a third sealing flange that is adapted to the third sealing groove. Similarly, the end of the third sealing flange is connected to two second sealing flanges on the side wall of the insert plate 9 at the corresponding position.

[0061] Each of the first sealing flange, the second sealing flange, and the third sealing flange is provided with a sealing gasket layer. After the insert plate 9 is inserted into the slot 13 and the pressure seat 8 is in close contact with the pump seat 12, the sealing gasket layer fills the gap between the first sealing flange, the second sealing flange, the third sealing flange and the first sealing groove, the second sealing groove, and the third sealing groove, so that the fluid will not leak when passing through the inside of the pump seat 12.

[0062] An L-shaped sliding rod 10 is provided at each of the four corners of the top of the pressure base 8, near the maintenance shell 5 and the inner wall of the pump body 1. The sliding rod 10 includes a vertical section connected to the top of the pressure base 8 and a horizontal section connected to the top of the vertical section. The maintenance shell 5 and the inner wall of the pump body 1 are provided with sliding grooves 28 that slide in cooperation with the horizontal section of the sliding rod 10. The horizontal sections of the four sliding rods 10 at the top of the pressure base 8 slide in the corresponding sliding grooves 28. The two ends of the sliding grooves 28 extend to the two ends of the maintenance shell 5. When the end cover 6 is open, the operating component can slide out of or into the maintenance shell 5 through the sliding cooperation between the sliding rod 10 and the sliding groove 28. The sliding groove 28 is also arc-shaped. The pump base 12 is located below the bottom of the sliding groove 28. When the operating component slides down the sliding groove 28 under the action of gravity to the lowest point of the sliding groove 28, the insert plate 9 is just aligned with the slot 13.

[0063] The bottom of the slide groove 28 above the pump base 12 is provided with a lifting groove 29. The lifting groove 29 is set vertically. The upper section of the lifting groove 29 is a diameter reduction section. The diameter reduction section gradually decreases in size from top to bottom. The bottom size of the diameter reduction section is adapted to the outer diameter of the horizontal section of the slide rod 10. The top of the diameter reduction section is connected to the slide groove 28. The lower section of the lifting groove 29 is a positioning guide section. The size of the positioning guide section is adapted to the outer diameter of the horizontal section of the slide rod 10.

[0064] When the operating component slides above the pump base 12 and the insert plate 9 is roughly aligned with the slot 13, the horizontal sections of the four slide rods 10 are at the top of the reduced diameter section of the lifting groove 29. At this time, under the action of gravity or by applying a downward external force to the pressure seat 8, the horizontal sections of the four slide rods 10 slide into the reduced diameter sections of the four lifting grooves 29. When they slide to the bottom of the reduced diameter section, the operating component is positioned. At this time, the insert plate 9 of the operating component is aligned with the slot 13 of the pump base 12. Continuing to slide down will allow the insert plate 9 to be inserted into the slot 13. During the continued sliding down, the positioning guide section of the lifting groove 29 ensures that the position of the operating component is aligned by sliding with the horizontal section of the slide rod 10.

[0065] The position of the slide groove 28 and the opening size of the slot 13 are matched with the impeller 11 so that when the horizontal section of the slide rod 10 rises in the lifting groove 29 and into the slide groove 28, the impeller 11 can pass through the slide groove 28 when the rotating component slides along the slide groove 28. That is, at this time, the outer diameter of the impeller 11 at each point is smaller than the distance between the corresponding positions on the two side walls of the slot 13 on its sliding trajectory.

[0066] The lower part of the lifting groove 29 is provided with a vertically lifting push block 30. The push block 30 is slidably connected to the inner wall of the pump body 1 where the lifting groove 29 is located, and the lifting range of the push block 30 covers the entire area of ​​the lifting groove 29. Vertically arranged slide rails are provided on the inner walls of the pump body 1 on both sides of the lifting groove 29. The push block 30 is provided with a slider that is slidably connected to the slide rail. The sliding range of the push block 30 is limited by the position of the top and bottom ends of the slide rail, so that when the push block 30 slides to the top end, the top surface of the push block 30 is flush with the bottom surface of the slide groove 28, and when the push block 30 slides to the bottom end, the top surface of the push block 30 is disengaged from the bottom of the lifting groove 29.

[0067] The top surface of the push block 30 is an arc shape that matches the trajectory of the slide groove 28. When the push block 30 slides up to the top of the lifting groove 29, the top surface of the push block 30 is flush with the bottom surface of the slide groove 28 and the trajectory matches. The trajectory of the horizontal section of the slide rod 10 sliding on the top surface of the push block 30 matches the trajectory of its sliding in the slide groove 28, so that the horizontal section of the slide rod 10 can smoothly pass through the lifting groove 29 through the top surface of the push block 30. A horizontally arranged support plate 32 is provided on the inner wall of the pump body 1 below the push block 30. Two vertically arranged first spring telescopic rods 31 are provided between the support plate 32 and the bottom of the push block 30. The elastic force of the first spring telescopic rods 31 pushes the push block 30 to the top.

[0068] A transmission assembly is provided between the operating component and the motor shaft 7. The transmission assembly enables the motor shaft 7 to be connected to the impeller 11 of the operating component, and also presses the operating component tightly against the pump base 12. The transmission assembly includes a pressure ring 15 and a support ring 20 sleeved around the motor shaft 7. The pressure ring 15 is positioned above the support ring 20. Both the pressure ring 15 and the support ring 20 are circular rings coaxial with the motor shaft 7. A plurality of second spring telescopic rods 19 are vertically arranged between the pressure ring 15 and the support ring 20. A sleeve 21 is rotatably provided at the bottom of the pressure ring 15. The bottom of the motor shaft 7 is prismatic. The inner hole of the sleeve 21 is prismatic and adapted to the shape of the bottom of the motor shaft 7. The sleeve 21 is slidably sleeved on the bottom of the motor shaft 7 and can slide axially on the bottom of the motor shaft 7. The depth of the inner hole of the sleeve 21 is greater than the depth of the lifting groove 29. A thrust bearing is provided between the top of the sleeve 21 and the support plate. The top of the pressure ring 15 is provided with multiple guide posts 16 vertically, and the bottom of the pump cover 2 is provided with a guide sleeve 17 that slides in cooperation with the multiple guide posts 16. The guide posts 16 slide in the guide sleeve 17 so that the pressure ring 15 can only slide vertically.

[0069] The bottom of the sleeve 21 is coaxially connected to the upper drive shaft 22, and the bottom of the upper drive shaft 22 is coaxially connected to the lower drive shaft 24. A coupling 23 is provided between the upper drive shaft 22 and the lower drive shaft 24. The top of the pressure seat 8 is rotatably connected to the insertion sleeve 34. The top of the insertion sleeve 34 is coaxially provided with an insertion hole, which is adapted to the lower drive shaft 24. The insertion sleeve 34 is coaxially connected to the impeller 11.

[0070] The lower drive shaft 24 is provided with a plurality of locking blocks 33 arranged at equal intervals along its circumference. The locking blocks 33 are arranged radially along the lower drive shaft 24 and slide elastically along the radial direction of the lower drive shaft 24. The locking blocks 33 are arc-shaped. The inner wall of the insertion hole is provided with locking slots 35 in number, position and size corresponding to the locking blocks 33.

[0071] During the insertion of the lower drive shaft 24 into the insertion hole of the insertion cylinder 34, the locking block 33 first elastically slides into the lower drive shaft 24. After the lower drive shaft 24 is fully inserted into the insertion hole, the locking block 33 and the locking groove 35 are on the same circumferential trajectory. At this time, if the locking block 33 is exactly aligned with the locking groove 35, the locking block 33 pops out and locks into the locking groove 35 to realize the transmission connection between the lower drive shaft 24 and the insertion cylinder 34. If the locking block 33 is not aligned with the locking groove 35, when the lower drive shaft 24 rotates, the locking block 33 will slide into the locking groove 35 to realize the transmission connection between the lower drive shaft 24 and the insertion cylinder 34. Correspondingly, when the transmission connection between the lower drive shaft 24 and the insertion cylinder 34 is disconnected, the lower drive shaft 24 slides away from the insertion hole along the axis. During the sliding process, the locking block 33 is squeezed and elastically slides into the lower drive shaft 24. After the lower drive shaft 24 is completely away from the insertion hole, the locking block 33 pops out of the lower drive shaft 24 under elastic force.

[0072] Multiple connecting rods 18 are provided on the outer circumference of the pressure ring 15. The connecting rods 18 are arranged at equal intervals in the circumferential direction of the pressure ring 15. The connecting rods 18 are inclined and their higher ends are connected to the outer wall of the pressure ring 15, so that the outline of the multiple connecting rods 18 is frustum-shaped. The lower ends of the multiple connecting rods 18 are connected to a first ring-shaped elastic element. At least one second ring-shaped elastic element is also provided inside the first elastic element. A connecting rod is connected between the second elastic element and the connecting rod 18. The first elastic element and the second elastic element have similar structures, both including a top ring 25 and a bottom ring 26 in a coaxial state. The top ring 25 is located above the bottom ring 26. Multiple third spring telescopic rods 27 are vertically arranged between the top ring 25 and the bottom ring 26. The third spring telescopic rods 27 are arranged at equal intervals in the circumferential direction of the top ring 25 and the bottom ring 26.

[0073] like Figure 4 As shown, both the first and second elastic elements are coaxial with the pressure ring 15. The top ring 25 of the first elastic element is connected to the lower end of a plurality of connecting rods 18. The outer diameter of the top ring 25 and bottom ring 26 of the second elastic element is smaller than the inner diameter of the top ring 25 and bottom ring 26 of the first elastic element. The second elastic element and the first elastic element are on the same plane, and the connecting rod is located at the corresponding position on the top ring 25 of the second elastic element.

[0074] The pump body 1 is equipped with a drive assembly for lifting and lowering the transmission components. The drive assembly includes a base mounted on a connecting rod 18, and a vertically arranged drive screw 14 is rotatably connected to the base. The top end of the drive screw 14 extends out of the pump cover 2, and the drive screw 14 is threadedly engaged with the pump cover 2. There are at least two drive screws 14, and the multiple drive screws 14 are arranged at equal intervals in a circular trajectory around the motor shaft 7.

[0075] During installation of the operating component, open end cover 6, insert the operating component into maintenance housing 5, and then close end cover 6. The horizontal sections of the four slide rods 10 of the operating component slide into maintenance housing 5 along slide groove 28, and slide down to the bottom of slide groove 28 under the action of gravity. At this time, the horizontal sections of the four slide rods 10 are respectively on the four lifting grooves 29, and the horizontal sections of the slide rods 10 are all supported by push blocks 30. Then, multiple drive screws 14 are rotated simultaneously. The multiple drive screws 14 are threaded with pump cover 2 to descend. The drive screws 14 push connecting rod 18, causing the transmission component to slide down. During the descent, the sleeve 21 of the transmission component slides down at the bottom of motor shaft 7. The first elastic element and the second elastic element of the transmission component push the pressure seat 8 of the operating component. As the pump slides down, the operating component slides down, and the four horizontal sections of the slide rods 10 push the four push blocks 30 down. The horizontal sections of the slide rods 10 slide into the lifting groove 29 until they reach the bottom of the lifting groove 29. Then, the pressure seat 8 of the operating component presses tightly onto the pump seat 12, the insert plate 9 is inserted into the slot 13, the lower drive shaft 24 is inserted into the insertion hole of the insertion tube 34, the pressure ring 15 is fixed in position, the first spring telescopic rod 31 is compressed, and the second spring telescopic rod 19 and the third spring telescopic rod 27 are also compressed. The elastic force of the second spring telescopic rod 19 keeps the sleeve 21 and the lower drive shaft 24 inserted into the insertion tube 34, and the elastic force of the third spring telescopic rod 27 keeps the pressure seat 8 pressing on the pump seat 12 with a certain pressure, thus achieving a seal inside the pump seat 12. When motor 3 is running, motor shaft 7 rotates. The bottom of motor shaft 7 and the inner hole of sleeve 21 are in the shape of a regular prism. Sleeve 21 rotates synchronously with motor shaft 7, driving upper drive shaft 22 and lower drive shaft 24 to rotate synchronously. Lower drive shaft 24 rotates inside plug-in sleeve 34 to realize the transmission connection between the two. Plug-in sleeve 34 rotates synchronously, driving impeller 11 to rotate synchronously, and the pump starts working.

[0076] When maintenance or replacement of the operating components is required, motor 3 stops running, and simultaneously drives screw 14. Drive screw 14 rises under the threaded engagement with pump cover 2, causing pressure ring 15 and connecting rod 18 to rise accordingly. First spring telescopic rod 31 extends, and its elastic force pushes push block 30 upwards. Push block 30 pushes the horizontal sections of four slide rods 10 upwards within lifting groove 29. The operating components rise accordingly until they are within slide groove 28. At this point, push block 30 reaches its highest point, with its top surface flush with the bottom surface of slide groove 28. The operating components stop rising, while the transmission components continue to rise until the first elastic element, the first... The two elastic elements disengage from the top of the pressure seat 8, and the lower drive shaft 24 pulls out the insertion sleeve 34. During this process, the sleeve 21 slides upward on the motor shaft 7, and the transmission component completely disengages from the operating component. Open the two end covers 6, and extend the rods and other components into the maintenance shell 5 to push the operating component out through the opening of the maintenance shell 5. Then slide the new or repaired operating component into the maintenance shell 5 and repeat the above-mentioned pressing operation to make the operating component descend and make tight contact with the pump seat 12. The motor shaft 7 and the impeller 11 are connected by transmission. Cover the end cover 6 and the pump can continue to run. The removed operating component can then be repaired and maintained.

[0077] The shape of the maintenance shell 5 can also be a horizontally arranged straight cylinder, allowing the operating components to slide horizontally within the maintenance shell 5. The slide groove 28 is arranged in a straight line. This structure results in a longer maintenance shell 5 and a larger lateral area occupied, leading to an increase in the pump's footprint. The space inside the maintenance shell 5 can also accommodate new or repaired operating components. An electric push rod or other electrically controlled drive device can be installed inside the maintenance shell 5 to push the operating component to be replaced into the maintenance shell 5. The operating component can be pushed directly above the pump base 12. Correspondingly, the drive screw 14 can be replaced with an electric push rod or other electrically controlled drive device. Flow meters are installed in the inlet and outlet. The flow meters, motor 3, and electric push rod are interlocked and controlled. When the flow is abnormal, a new operating component can be automatically replaced, further reducing the time the impeller 11 operates with a fault. This allows for automatic replacement of the impeller 11 in the early stages of an impeller 11 malfunction. After automatic replacement of the impeller 11, the operator can open the end cover 6 to remove the replaced operating component.

[0078] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the technical solutions of the present invention. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of the patent of the present invention.

Claims

1. A multiphase flow pump, characterized in that, include: Pump body; Pump base, located inside the pump body; The inlet and outlet are connected to the bottom and side of the pump base, respectively; Pump cover, located on the pump body; The bracket is mounted on the pump cover; The motor is mounted on a bracket; The maintenance housing is located on the pump body; Operating components, slidably disposed within the maintenance housing and pump body, include: Pressing seat; Two insert plates are located at the bottom of the pressure base; The impeller is rotatably mounted at the bottom of the pressure base; The transmission assembly, which is vertically and retractably mounted within the pump body, includes: Support ring; The sleeve is rotatably positioned at the bottom of the support ring; The pump base is provided with a slot corresponding to the insertion plate, and the insertion plate and the slot are on the trajectory of the operating components sliding in the maintenance shell and the pump body; The motor shaft of the motor extends into the pump cover and its bottom end is in the shape of a regular prism. The inner hole of the sleeve is adapted to the bottom of the motor shaft, and the sleeve is fitted onto the bottom of the motor shaft. The top of the pressure seat is rotatably provided with a plug-in cylinder coaxially connected to the impeller, and the plug-in cylinder is movably plugged into the sleeve; The support ring is located around the motor shaft, and the pump body is equipped with a drive assembly that drives the support ring to rise and fall. An L-shaped sliding rod is provided at each of the four corners of the top two sides of the pressure seat, near the maintenance shell and the inner wall of the pump body. The sliding rod includes a vertical section connected to the top of the pressure seat and a horizontal section connected to the top of the vertical section. The inner wall of the maintenance shell and the pump body is provided with a sliding groove that slides in conjunction with the horizontal section of the sliding rod. The horizontal sections of the four sliding rods at the top of the pressure seat slide in the corresponding sliding grooves respectively. The two ends of the sliding grooves extend to the two ends of the maintenance shell respectively. The two ends of the maintenance shell are threadedly connected to end caps. The center of the end cap is provided with a slot hole that mates with an internal hex wrench. The bottom of the slide groove above the pump base is provided with a vertically arranged lifting groove. The upper section of the lifting groove is a diameter reduction section, which gradually decreases in size from top to bottom. The bottom size of the diameter reduction section is adapted to the outer diameter of the horizontal section of the slide rod. The top of the diameter reduction section is connected to the slide groove. The lower section of the lifting groove is a positioning guide section, which is adapted to the outer diameter of the horizontal section of the slide rod.

2. The multiphase flow pump according to claim 1, characterized in that, The lower part of the lifting groove is provided with a vertically lifting push block. The push block is slidably connected to the inner wall of the pump body where the lifting groove is located. The lifting range of the push block covers the entire lifting groove area. The top surface of the push block is shaped to match the trajectory of the slide. When the push block slides up to the top of the lifting groove, the top surface of the push block is flush with the bottom surface of the slide and the trajectory is matched.

3. The multiphase flow pump according to claim 2, characterized in that, Vertically arranged slide rails are provided on the inner walls of the pump body on both sides of the lifting groove. A slider that is slidably connected to the slide rail is provided on the push block. A horizontally arranged support plate is provided on the inner wall of the pump body below the push block. Two vertically arranged first spring telescopic rods are provided between the support plate and the bottom of the push block.

4. The multiphase flow pump according to claim 1, characterized in that, The slot has two side walls with sloping bottoms that are close to each other. The side wall of the slot near the pump seat is also provided with a step. The steps on the two side walls of the slot protrude in the direction of being close to each other. The shape of the insert plate is adapted to the slot. The two side walls of the insert plate are sloping and the corresponding positions on the two side walls are provided with step grooves that cooperate with the steps.

5. The multiphase flow pump according to claim 4, characterized in that, The slot has a recessed first sealing groove at the bottom and two recessed second sealing grooves on each side wall of the slot. The two second sealing grooves extend downward to the bottom of the slot and merge into the first sealing groove. The pump seat has a recessed third sealing groove on the surface where the top opening contacts the pressure seat. The end of the third sealing groove communicates with the two second sealing grooves on the side wall of the slot at the corresponding position. The bottom of the insert plate is provided with a first sealing flange that is adapted to the first sealing groove. Two second sealing flanges that extend downward and connect to the first sealing flange are respectively provided on the two side walls of the insert plate. The two second sealing flanges are adapted to the two second sealing grooves. The bottom of the pressure seat is provided with a third sealing flange that is adapted to the third sealing groove. The end of the third sealing flange is connected to the two second sealing flanges on the side wall of the insert plate at the corresponding position. Each of the first sealing flange, the second sealing flange, and the third sealing flange is provided with a sealing gasket layer.

6. The multiphase flow pump according to claim 1, characterized in that, The bottom of the sleeve is coaxially connected to an upper drive shaft, the bottom of the upper drive shaft is coaxially connected to a lower drive shaft, a coupling is provided between the upper drive shaft and the lower drive shaft, and a plug hole is coaxially opened at the top of the plug-in sleeve, the plug hole being adapted to the lower drive shaft; The lower drive shaft is provided with a plurality of locking blocks arranged at equal intervals in its circumferential direction. The locking blocks are arranged radially along the lower drive shaft and slide elastically in the radial direction of the lower drive shaft. The locking blocks are arc-shaped. The inner wall of the insertion hole is provided with locking slots whose number, position and size correspond to the locking blocks.

7. The multiphase flow pump according to claim 1, characterized in that, Above the support ring is a pressure ring located around the motor shaft. The top of the pressure ring is provided with multiple guide posts. The bottom of the pump cover is provided with a guide sleeve that slides with the multiple guide posts. Multiple second spring telescopic rods are provided vertically between the pressure ring and the support ring. The outer wall of the pressure ring is provided with a plurality of connecting rods. The connecting rods are arranged at equal intervals in the circumferential direction of the pressure ring. The connecting rods are inclined and their higher ends are connected to the outer wall of the pressure ring. The lower ends of the plurality of connecting rods are connected to a first ring-shaped elastic element. At least one second ring-shaped elastic element is also provided inside the first elastic element. A connecting rod is connected between the second elastic element and the connecting rod. The drive assembly includes a base mounted on a connecting rod, on which a vertically arranged drive screw is rotatably connected. The top end of the drive screw extends out of the pump cover, and the drive screw is threadedly engaged with the pump cover. Multiple drive screws are provided, and the multiple drive screws are arranged at equal intervals around the motor shaft in a circular trajectory.

8. The multiphase flow pump according to claim 7, characterized in that, Both the first elastic element and the second elastic element include a top ring and a bottom ring in a coaxial state. The top ring is located above the bottom ring. A plurality of third spring telescopic rods are vertically arranged between the top ring and the bottom ring. The third spring telescopic rods are arranged at equal intervals in the circumferential direction of the top ring and the bottom ring. Both the first elastic element and the second elastic element are coaxial with the pressure ring and disposed on the same plane. The top ring of the first elastic element is connected to the lower end of a plurality of connecting rods, and the top ring of the second elastic element is connected to a connecting rod.

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