A device for dismounting and mounting guide vanes of a centrifugal pump

Abstract

This utility model relates to the field of centrifugal pump maintenance and discloses a device for disassembling and assembling centrifugal pump guide vanes. The device includes: a support frame comprising a fixed frame and two sliding frames, the two sliding frames being slidably connected to the two ends of the fixed frame in a one-to-one correspondence, and all three being located on the same straight line. The ends of the two sliding frames furthest apart are detachably connected to the end face of the pump body; a pull rod penetrating the fixed frame, the pull rod being slidably connected to the fixed frame along its axial direction; and a fixing ring fixedly connected to the lower end of the pull rod, the fixing ring being detachably connected to the guide vane. This utility model effectively solves the problems of fixed support frame size and narrow applicability in existing technologies, significantly improving the versatility and practicality of the device, and providing a more efficient and reliable solution for disassembling and assembling centrifugal pump guide vanes.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump maintenance, and in particular to a device for disassembling and assembling centrifugal pump guide vanes. Background Technology

[0002] Centrifugal pumps play a vital role in modern industry, widely used in power, water conservancy, petrochemical, and other fields. As one of the core components, the efficiency and quality of the disassembly and assembly of centrifugal pump guide vanes directly affect the equipment's maintenance cycle and operational stability. Efficient, safe, and versatile disassembly and assembly devices can significantly reduce equipment maintenance costs, shorten downtime, and improve production efficiency, thus possessing significant application value and good market potential.

[0003] In the prior art, patent document CN215394986U discloses a centrifugal pump guide vane disassembly and assembly device. This device includes a pull rod, a fixing ring, and a bracket. The pull rod, through a threaded engagement between a threaded sleeve and the external thread of the pull rod body, drives the fixing ring to move axially, thereby achieving the disassembly and installation of the guide vane. The bracket has slots at both ends and is fixed to the pump body end face by studs and nuts. Its structural design improves the stability and safety of the disassembly and assembly process to a certain extent. However, this solution has significant limitations. The bracket uses a fixed size and cannot adapt to pump body end faces of different sizes. In actual industrial applications, there are many models of centrifugal pumps with significant differences in pump body end face dimensions. This fixed-size bracket design means it can only be used with pump bodies of specific sizes, greatly limiting the device's versatility and applicability. When encountering pump bodies of different sizes, the bracket needs to be redesigned and manufactured, increasing maintenance and time costs and reducing work efficiency.

[0004] Given the shortcomings of the existing technology, it is particularly necessary to develop a centrifugal pump guide vane disassembly and assembly device that can adapt to pump body end faces of different sizes. Summary of the Invention

[0005] The present invention aims to provide a disassembly and assembly device for centrifugal pump guide vanes to overcome the shortcomings of the above-mentioned situation.

[0006] In order to achieve the above objectives, the technical solution of this utility model is as follows: A device for disassembling and assembling guide vanes for a centrifugal pump, comprising: The bracket includes a fixed frame and two sliding frames. The two sliding frames are slidably connected to the two ends of the fixed frame in a one-to-one correspondence, and the three are located on the same straight line. The ends of the two sliding frames that are far apart are used for detachable connection to the end face of the pump body. A tie rod extending through the fixing frame, the tie rod being slidably connected to the fixing frame along its axial direction; and A retaining ring is fixedly connected to the lower end of the pull rod, and the retaining ring is used for detachable connection with the guide vane.

[0007] Furthermore, both ends of the fixed frame are provided with blind holes, and the ends of the sliding frame that are close to each other are slidably connected to the blind holes; Also includes: A rotating plate rotatably connected above the fixed frame is rotatable along the axial direction of the pull rod. Two connecting rods are symmetrically arranged at both ends of the rotating plate. One end of the connecting rod is rotatably connected to the rotating plate, and the other end is rotatably connected to the sliding frame.

[0008] Furthermore, it also includes a threaded sleeve, which has an internal thread. The upper section of the outer side wall of the threaded sleeve is rotatably connected to the rotating plate via a bearing, and the middle section of the outer side wall of the threaded sleeve is rotatably connected to the fixed frame via a bearing. The middle part of the pull rod has an external thread, and the pull rod passes through the threaded sleeve, and the two are rotatably connected.

[0009] Furthermore, the threaded sleeve is coaxially fixedly connected to a drive assembly, which is used to selectively drive the threaded sleeve to rotate in one direction.

[0010] Furthermore, the driving component includes: A housing located below the mounting bracket, the housing being fixedly connected to a handle; A cylindrical ratchet is rotatably connected inside the housing, and the lower section of the threaded sleeve passes through the cylindrical ratchet, and the two are fixedly connected. A rotating shaft is rotatably connected inside the housing, and a steering block is fixedly connected to the rotating shaft. The steering block is located between the cylindrical ratchet and the front end of the handle. The end of the steering block near the cylindrical ratchet has two sets of bites, and the end of the steering block away from the cylindrical ratchet has two engagement grooves. The handle has a mounting groove at its front end, and a spring is installed in the mounting groove. A ball is connected to one end of the spring near the steering block. Under the action of the spring, the ball abuts against one of the engagement grooves. Simultaneously, one set of bites can engage with the teeth of the cylindrical ratchet, so that the cylindrical ratchet can rotate in one direction.

[0011] Furthermore, a wrench is fixedly connected to the lower end of the rotating shaft through the housing.

[0012] Furthermore, the handle includes: An operating rod fixedly connected to the housing, the operating rod being fixedly connected to the housing, and the fitting groove being provided at one end of the operating rod near the housing; and A sleeve that is slidably connected to the operating lever.

[0013] Furthermore, the outer wall of the operating rod is provided with a sliding groove, and the side wall of the sleeve is threadedly connected with a limiting bolt, which passes through the sleeve and is slidably connected to the sliding groove.

[0014] Furthermore, a slot is provided at one of the sliding frames that is far apart from each other. The slot is U-shaped and is detachably connected to the pump body end face by bolts and nuts.

[0015] Compared with the prior art, this utility model has at least the following advantages: In use, the total length of the three components is adjusted by sliding two sliding brackets at both ends of the fixed bracket to match the end face of the centrifugal pump to which the guide vane is to be disassembled and installed. The sliding brackets are then fixed to the pump body end face with studs and nuts. The fixing ring is then connected to the guide vane, and the disassembly and installation of the guide vane can be achieved by pushing and pulling the lever.

[0016] Through the above methods, this utility model effectively solves the problems of fixed bracket size and narrow applicability in the prior art, significantly improves the versatility and practicality of the device, and provides a more efficient and reliable solution for the disassembly and assembly of centrifugal pump guide vanes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the disassembly and assembly device for centrifugal pump guide vanes according to this utility model. Figure 2 This is an exploded view of the disassembly and assembly device for centrifugal pump guide vanes according to this utility model; Figure 3 This is a cross-sectional view of the drive component of this utility model.

[0019] Reference numerals: 1. Fixed frame; 2. Blind hole; 3. Sliding frame; 4. Tie rod; 5. Fixed ring; 6. Rotating plate; 7. Connecting rod; 8. Threaded sleeve; 9. Bearing; 10. Housing; 11. Cylindrical ratchet; 12. Rotating shaft; 13. Steering block; 14. Engagement jaw; 15. Engaging groove; 16. Fitting groove; 17. Spring; 18. Ball bearing; 19. Wrench; 20. Operating lever; 21. Sleeve; 22. Sliding groove; 23. Limit bolt; 24. Connecting plate; 25. Mounting groove; 26. Connecting hole; 27. Groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figure 1-2 This utility model provides a disassembly and assembly device for centrifugal pump guide vanes, which mainly consists of a bracket, a tie rod 4 and a fixing ring 5.

[0023] The support includes a fixed frame 1 and two sliding frames 3. The two sliding frames 3 are slidably connected to both ends of the fixed frame 1, and all three are on the same straight line. The ends of the two sliding frames 3 that are far apart are used for detachable connection to the end face of the pump body. A fixing ring 5 is fixedly connected to the lower end of the pull rod 4, and the fixing ring 5 is used for detachable connection with the guide vane.

[0024] In use, the total length of the three components is adjusted by sliding the two sliding frames 3 at both ends of the fixed frame 1 to match the end face of the centrifugal pump to be disassembled and installed. The sliding frames 3 are then fixed to the pump body end face with studs and nuts. The fixing ring 5 is then connected to the guide vane. The disassembly and installation of the guide vane can be achieved by pushing and pulling the pull rod 4.

[0025] Preferably, the tie rod 4 passes through the fixed frame 1 and can be slidably connected to the fixed frame 1 along its axial direction. The lower end of the tie rod 4 has an integrally formed connecting plate 24. The fixing ring 5 has a mounting groove 25 for mounting the connecting plate 24, and the connecting plate 24 is fixedly connected in the mounting groove 25. The fixing ring 5 has a connecting hole 26 for detachable connection with the guide vane, so as to firmly fix the guide vane during disassembly and assembly. Furthermore, the outer end of the sliding frame 3 is designed as a U-shaped groove 27, which is detachably connected to the pump body end face by bolts and nuts.

[0026] To achieve a sliding connection between the sliding frame 3 and the fixed frame 1, blind holes 2 are machined at both ends of the fixed frame 1. The ends of the sliding frame 3 that are close to each other are adapted to these blind holes 2, allowing them to slide smoothly within the blind holes 2. A sliding groove 22 is provided on the side wall of the sliding frame 3, and a sliding protrusion is provided on the side wall of the blind hole 2. The sliding protrusion is slidably connected to the sliding groove. This structural design allows the sliding frame 3 to be adjusted in position according to pump body end faces of different sizes, thereby improving the versatility and applicability of the device.

[0027] The device also includes a rotating plate 6 rotatably connected above the fixed frame 1, which can rotate along the axial direction of the pull rod 4. Two connecting rods 7 are symmetrically arranged at both ends of the rotating plate 6, one end of which is rotatably connected to the rotating plate 6, and the other end is rotatably connected to the sliding frame 3. This connecting rod 7 mechanism design ensures that when the rotating plate 6 rotates, the two sliding frames 3 can move synchronously through the connecting rods 7, thereby ensuring that the pull rod 4 is always located at the center position of the fixed frame 1. This allows for precise alignment between the fixed ring 5 and the guide vane, further enhancing the flexibility and adaptability of the device.

[0028] The middle part of the pull rod 4 is machined with an external thread, and the inner side wall of the threaded sleeve 8 is provided with a matching internal thread. The upper and middle sections of the outer side wall of the threaded sleeve 8 are rotatably connected to the rotating plate 6 and the fixed frame 1 respectively through the bearing 9. The pull rod 4 passes through the threaded sleeve 8 and is rotatably connected to the threaded sleeve 8.

[0029] Reference Figure 3 The lower end of the threaded sleeve 8 is coaxially fixedly connected to a drive assembly, which is used to selectively drive the threaded sleeve 8 to rotate in one direction. By rotating the threaded sleeve 8 in different directions, the pull rod 4 can be driven to move upward or downward.

[0030] The drive assembly includes a housing 10 located below the mounting bracket 1, with a handle fixedly connected to the housing 10. A cylindrical ratchet 11 is rotatably connected inside the housing 10, and the lower section of a threaded sleeve 8 passes through and is fixedly connected to the cylindrical ratchet 11. A rotating shaft 12 is also rotatably connected inside the housing 10, and a steering block 13 is fixedly connected to the rotating shaft 12. The steering block 13 is located between the cylindrical ratchet 11 and the front end of the handle. The end of the steering block 13 near the cylindrical ratchet 11 has two sets of bites 14, and the end away from the cylindrical ratchet 11 has two engagement grooves 15. A fitting groove 16 is opened at the front end of the handle, and a spring 17 is installed in the fitting groove 16. A ball 18 is connected to the end of the spring 17 near the steering block 13. Under the action of the spring 17, the ball 18 abuts against one of the engagement grooves 15, and simultaneously, one set of bites 14 can engage with the teeth of the cylindrical ratchet 11, enabling the cylindrical ratchet 11 to rotate in one direction. With this unique drive component design, the operator can easily control the unidirectional rotation of the threaded sleeve 8 through the handle, thereby realizing the feed or retraction of the pull rod 4 and completing the disassembly and assembly of the guide vane.

[0031] The lower end of the rotating shaft 12 passes through the housing 10 and is fixedly connected to a wrench 19. The wrench 19 allows the operator to rotate the rotating shaft 12 more effortlessly during operation, thereby driving the steering block 13 to rotate, so that the ball 18 is embedded in different mating grooves 15 to change the rotation direction of the threaded sleeve 8.

[0032] The handle includes an operating rod 20 fixedly connected to the housing 10 and a sleeve 21 slidably connected to the operating rod 20. The operating rod 20 has a mounting groove 16 at its end near the housing 10 for mounting components such as a spring 17 and a ball bearing 18. A sliding groove 22 is machined onto the outer wall of the operating rod 20, and a limiting bolt 23 is threaded onto the side wall of the sleeve 21, passing through the sleeve 21 and slidably connected to the sliding groove 22. This structural design allows the sleeve 21 to be adjusted in position on the operating rod 20 to change the length of the handle, facilitating its operation.

[0033] The operating steps of this utility model are as follows: Adjust the position of the sliding bracket 3: According to the pump body end face size of the centrifugal pump to be disassembled and assembled, adjust the position of the two sliding brackets 3 on the fixed bracket 1 so that the U-shaped slot 27 is adapted to the pump body end face.

[0034] Connect the pump body end face: Securely connect the outer end of the sliding bracket 3 to the pump body end face with bolts and nuts to ensure a stable connection between the bracket and the pump body.

[0035] Connecting the guide vane: Connect the retaining ring 5 to the guide vane to be disassembled, ensuring a firm and reliable connection. The connection method can be bolted or other reliable methods, depending on the structure of the guide vane and actual requirements.

[0036] Disassembly Operation: The operator holds the handle and rotates the rotating shaft 12 using the wrench 19, which in turn rotates the steering block 13 and the cylindrical ratchet 11. Under the unidirectional drive of the cylindrical ratchet 11, the threaded sleeve 8 rotates along its axial direction. Due to the threaded engagement between the pull rod 4 and the threaded sleeve 8, the pull rod 4 will move outward along its axial direction, pulling the retaining ring 5 and the guide vane out of the pump body. Once the guide vane is fully pulled out, subsequent handling or maintenance operations can be performed.

[0037] Installation Operation: The operation process is the reverse of disassembly. The operator aligns the guide vane with the installation position on the pump body, and controls the threaded sleeve 8 to rotate in the opposite direction using the handle and wrench 19, so that the pull rod 4 moves inward along its axis, and smoothly pushes the guide vane into the pump body until the guide vane is installed in place.

[0038] Separate the guide vane from the retaining ring 5: After completing the disassembly and assembly of the guide vane, first separate the retaining ring 5 from the guide vane.

[0039] Disassembly device: Loosen the connecting bolts and nuts between the sliding frame 3 and the pump body end face, and remove the entire disassembly device from the pump body for the next use or storage.

[0040] Through the detailed description of the above specific embodiments, the disassembly and assembly device for centrifugal pump guide vanes has a reasonable structure and is easy to operate. It can effectively solve the problems of fixed bracket size and narrow applicability in the prior art, significantly improve the versatility and practicality of the device, and provide a more efficient and reliable solution for the disassembly and assembly of centrifugal pump guide vanes.

[0041] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A device for dismounting and mounting a guide vane of a centrifugal pump, characterized in that include: The bracket includes a fixed frame (1) and two sliding frames (3). The two sliding frames (3) are slidably connected to the two ends of the fixed frame (1) in a one-to-one correspondence, and the three are located on the same straight line. The ends of the two sliding frames (3) that are far apart are used to be detachably connected to the end face of the pump body. A pull rod (4) is provided through the fixing frame (1), and the pull rod (4) is slidably connected to the fixing frame (1) along its axial direction; and A fixing ring (5) is fixedly connected to the lower end of the pull rod (4), and the fixing ring (5) is used for detachable connection with the guide vane.

2. The device for disassembling and assembling the guide vanes of a centrifugal pump according to claim 1, characterized in that, Both ends of the fixed frame (1) are provided with blind holes (2), and the ends of the sliding frame (3) that are close to each other are slidably connected to the blind holes (2); Also includes: A rotating plate (6) is rotatably connected above the fixed frame (1), the rotating plate (6) being able to rotate along the axial direction of the pull rod (4), and Two connecting rods (7) are symmetrically arranged at both ends of the rotating plate (6). One end of the connecting rod (7) is rotatably connected to the rotating plate (6), and the other end is rotatably connected to the sliding frame (3).

3. The disassembly and assembly device for centrifugal pump guide vanes according to claim 2, characterized in that, It also includes a threaded sleeve (8), which is provided with an internal thread. The upper section of the outer side wall of the threaded sleeve (8) is rotatably connected to the rotating plate (6) through a bearing (9). The middle section of the outer side wall of the threaded sleeve (8) is rotatably connected to the fixed frame (1) through a bearing (9). The middle part of the pull rod (4) is provided with an external thread. The pull rod (4) passes through the threaded sleeve (8) and the two are rotatably connected.

4. The device for disassembling and assembling the guide vanes of a centrifugal pump according to claim 3, characterized in that, The threaded sleeve (8) is coaxially fixedly connected to a drive assembly, which is used to selectively drive the threaded sleeve (8) to rotate in one direction.

5. The device for disassembling and assembling the guide vanes of a centrifugal pump according to claim 4, characterized in that, The driving component includes: The housing (10) located below the fixing frame (1) has a handle fixedly connected to it; A cylindrical ratchet (11) is rotatably connected inside the housing (10), and the lower section of the threaded sleeve (8) passes through the cylindrical ratchet (11), and the two are fixedly connected. A rotating shaft (12) is rotatably connected inside the housing (10). A steering block (13) is fixedly connected to the rotating shaft (12). The steering block (13) is located between the cylindrical ratchet (11) and the front end of the handle. The steering block (13) has two sets of bites (14) at the end near the cylindrical ratchet (11), and two engagement grooves (15) at the end away from the cylindrical ratchet (11). The front end of the handle is provided with a mounting groove (16), and a spring (17) is installed in the mounting groove (16). A ball (18) is connected to one end of the spring (17) near the steering block (13). Under the action of the spring (17), the ball (18) abuts against one of the engagement grooves (15). Simultaneously, one set of bites (14) can engage with the teeth of the cylindrical ratchet (11), so that the cylindrical ratchet (11) can rotate in one direction.

6. The device for disassembling and assembling the guide vanes of a centrifugal pump according to claim 5, characterized in that, The lower end of the rotating shaft (12) is fixedly connected to a wrench (19) through the housing (10).

7. The disassembly and assembly device for centrifugal pump guide vanes according to claim 5, characterized in that, The handle includes: An operating rod (20) is fixedly connected to the housing (10), the operating rod (20) is fixedly connected to the housing (10), and the end of the operating rod (20) near the housing (10) is provided with the fitting groove (16); and The sleeve (21) is slidably connected to the operating lever (20).

8. The device for disassembling and assembling the guide vanes of a centrifugal pump according to claim 7, characterized in that, The outer wall of the operating lever (20) is provided with a sliding groove (22), and the side wall of the sleeve (21) is threaded with a limiting bolt (23). The limiting bolt (23) passes through the sleeve (21) and is slidably connected to the sliding groove (22).

9. A device for disassembling and assembling the guide vanes of a centrifugal pump according to any one of claims 1 to 8, characterized in that, The lower end of the pull rod (4) is integrally formed with a connecting plate (24), and the fixing ring (5) is provided with an installation groove (25) for the connecting plate (24) to be installed. The connecting plate (24) is fixedly connected in the installation groove (25), and the fixing ring (5) is provided with a connecting hole (26).

10. A device for disassembling and assembling the guide vanes of a centrifugal pump according to any one of claims 1 to 8, characterized in that, The sliding frame (3) has a slot (27) at one end that is far apart from each other. The slot (27) is U-shaped and is detachably connected to the pump body end face by bolts and nuts.

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