Pressure head guide impeller of centrifugal pump

Abstract

The utility model discloses a centrifugal pump pressure head guide impeller, which belongs to the technical field of impellers, and comprises a bottom plate, a mounting pipe is fixedly connected to one side surface of the bottom plate, the mounting pipe and the bottom plate are concentric, a mounting port is arranged at one end of the mounting pipe, a plurality of blades are uniformly arranged on the bottom plate, and a plurality of notches corresponding to the blades are uniformly arranged on the outer side surface of the mounting pipe. And the clamping columns are clamped in the notches and fixedly connected with one ends of the blades, the arc-shaped fixing blocks are arranged at the tops of the blades, the multiple fixing blocks are arranged in a circumferential mode, the locking pieces are clamped outside the fixing blocks, the damaged blades can be replaced and maintained, and the overall maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of impellers, and more specifically to a centrifugal pump pressure head guide impeller. Background Art

[0002] A centrifugal pump is a pump that transports liquid by the centrifugal force generated by the rotation of the impeller. The basic structure of a centrifugal pump consists of six parts: impeller, pump body, pump shaft, bearing, sealing ring, and stuffing box.

[0003] The impeller of the existing centrifugal pump adopts an integral structure. Due to the high degree of wear on the impeller during the process of lifting high-density liquid, the existing maintenance mostly adopts overall replacement. Although this can ensure work efficiency, only a small number of blades of the replaced impeller are damaged, and most of them are still in the usable stage. When all of them are replaced, the overall cost will undoubtedly increase. A solution is proposed below to the above problem. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a centrifugal pump pressure head guide impeller, which can realize the replacement and maintenance of damaged blades and reduce the overall maintenance cost.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A centrifugal pump pressure head guide impeller comprises a base plate, a side surface of the base plate is fixedly connected to a mounting tube, the mounting tube and the base plate are concentric, one end of the mounting tube is provided with a mounting opening, a plurality of blades are evenly arranged on the base plate, a plurality of recesses corresponding to the blades are evenly arranged on the outer side surface of the mounting tube, a clamping column is clamped inside the recess, the clamping column is fixedly connected to one end of the blade, an arc-shaped fixing block is provided on the top of the blade, a plurality of the fixing blocks are arranged in a circle, and a locking piece is clamped on the outside of the fixing block.

[0007] Preferably, the locking member comprises a half ring, a clamping block and a clamping seat, and two half rings are provided, and two ends of the two half rings are respectively connected with a clamping block and a clamping seat, and the clamping block and the clamping seat can be clamped with each other.

[0008] Preferably, a socket is provided on the bottom plate, a guide groove is provided on the socket toward the recess, the guide groove is connected to the socket, a guide block is slidably provided inside the guide groove, the diameter of the socket is larger than the guide block, and the guide block is fixedly connected to the blade.

[0009] Preferably, the cross section of the guide groove is T-shaped, and the cross section of the guide block is T-shaped to match the guide groove.

[0010] Preferably, a triangular block is provided on the upper top of the guide block.

[0011] Preferably, the fixing block is semicircular, and the inner arc surface of the fixing block faces the side away from the mounting tube.

[0012] Preferably, the cross section of the semi-ring is circular, and the curvature of the cross section of the semi-ring matches the inner curvature of the fixing block.

[0013] Preferably, the clamping block is provided with a through opening, a limiting bolt is passed through the through opening, and the limiting bolt is threadably matched with the clamping seat.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] 1. This solution prevents the blades from moving in a direction perpendicular to the base plate by cooperating with the clamping column and the recess. The locking member and the fixed block can prevent the blades from moving in a plane parallel to the base plate, thereby ensuring a stable connection between the blades and the base plate. The mounting tube and the output end of the external centrifugal pump device are installed. The centrifugal pump drives the mounting tube to rotate, and the base plate is driven to rotate through the mounting tube, thereby driving the blades to rotate. The rotating blades convey the fluid. When the blades need to be replaced and maintained, the locking member is first opened. The locking member will remove the restriction on the fixed block, so that several fixed blocks can move in a direction away from the axis of the mounting tube, thereby driving the blades to move, that is, driving the clamping column to move out of the recess, thereby achieving replacement or maintenance of a single blade, and avoiding the trouble of overall replacement.

[0016] Second, two half rings can be mounted on the outside of several fixed blocks in the form of clamps, and then connected through the blocks and seats at both ends of the two half rings, so as to complete the connection of all blades and prevent the blades from moving in a direction parallel to the plane of the base plate, thereby achieving fixation. At the same time, the fixing method of the locking piece can achieve the effect of quickly installing and removing all blades, ensuring the efficiency of maintenance.

[0017] 3. The socket facilitates the insertion of the guide block, so that the guide block is located at one end of the guide groove, and the guide block is moved into the guide groove, so that the blade and the bottom plate are fixed through the cooperation of the guide block and the guide groove, avoiding the separation of the blade and the bottom plate. At the same time, the socket can remove the guide block from the guide groove, which is convenient for separating the blade and the bottom plate.

[0018] Fourth, the cross-sections of the guide groove and the guide block are both T-shaped, which can achieve sliding fit between the guide block and the guide groove, and at the same time avoid separation between the bottom block and the blade.

[0019] 5. The addition of the triangular block can tighten the blades as the guide block moves, avoiding gaps between the blades and the base plate.

[0020] 6. The semicircular design of the fixing block can limit the locking piece, so that after the locking piece fixes the fixing block, the fixing block can also limit the locking piece, preventing the fixing block and the locking piece from moving in a direction perpendicular to the bottom plate and causing the fixing block and the locking piece to separate.

[0021] 7. The circular design can fit the curvature of the fixed block to ensure the stability of the restriction.

[0022] 8. The limit bolt is used to facilitate the limiting and fixing of the clamping block and the clamping seat to avoid the separation of the bottom block and the base during long-term use. At the same time, the through hole is used for the limit bolt to pass through. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the top view of the utility model;

[0024] Figure 2 This is a front view structural diagram of the blade of the utility model;

[0025] Figure 3 It is a schematic diagram of the top view of the base and the mounting pipe of the utility model;

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the installation pipe of the utility model when viewed from above;

[0027] Figure 5 It is a cross-sectional structural schematic diagram of the bottom plate, the socket, the guide groove and the guide block of the utility model;

[0028] Figure 6 It is a schematic diagram of the enlarged structure of A of the present utility model.

[0029] Description of the numbers in the figure:

[0030] 1. Base plate; 2. Mounting tube; 3. Mounting port; 4. Blade; 5. Notch; 6. Clamping column; 7. Fixing block; 8. Locking piece; 9. Half ring; 10. Clamping block; 11. Clamping seat; 12. Socket; 13. Guide groove; 14. Guide block; 15. Triangular block; 16. Through-hole; 17. Limit bolt. DETAILED DESCRIPTION

[0031] Embodiment 1:

[0032] See also Figure 1-6A centrifugal pump pressure head guide impeller comprises a base plate 1, which is circular, and a mounting pipe 2 is fixedly connected to one side of the base plate 1. The mounting pipe 2 and the base plate 1 are concentric, and a mounting port 3 is opened at one end of the mounting pipe 2. A through hole connected to the mounting port 3 is opened on one side of the mounting pipe 2. The mounting pipe 2 is installed through the mounting pipe 2 and the output end of the external centrifugal pump equipment. The mounting pipe 2 is driven to rotate by the centrifugal pump, and the base plate 1 is driven to rotate by the mounting pipe 2. The through hole is used for bolts to pass through and fix to the output end of the centrifugal pump located inside the mounting port 3, thereby ensuring the stability of the connection between the centrifugal pump and the mounting pipe 2.

[0033] A plurality of blades 4 are evenly arranged on the bottom plate 1. The blades 4 are arranged in a circle around the center of the bottom plate 1. The blades 4 are designed in an arc shape. A flow channel for fluid to pass through is formed between adjacent blades 4. A plurality of notches 5 corresponding to the blades 4 are evenly opened on the outer side of the mounting tube 2. A clamping column 6 is clamped inside the notch 5. An interference fit is adopted between the clamping column 6 and the notch 5 to ensure the stability of the clamping between the notch 5 and the clamping column 6. At the same time, when disassembly is required, the clamping column 6 and the notch 5 can be separated by applying pressure to achieve detachability. The clamping column 6 is fixedly connected to one end of the blade 4.

[0034] Through the clamping design of the notch 5 of the clamping column 6, one end of the blade 4 can be connected to one end of the mounting tube 2, thereby ensuring that one end of the blade 4 is connected to the base plate 1. The base plate 1 rotates to drive the blade 4 to rotate, and the fluid is transported through the rotating blade 4 and the flow channel.

[0035] A socket 12 is provided on the bottom plate 1, and the socket 12 is cylindrical, and the notch 5 is perpendicular to the plane where the bottom plate 1 is located. A guide groove 13 is provided on the socket 12 in the direction of the notch 5, and the guide groove 13 is connected to the socket 12, and the cross section of the guide groove 13 is in an inverted T shape. The guide groove 13 includes a bottom card groove and a top through groove. The card groove is located inside the bottom plate 1, and one end of the card groove is connected to the socket 12, and the width of the card groove is the same as the diameter of the socket 12. The through groove is located at the top of the bottom plate 1, and the through groove is connected to the card groove, and one end of the through groove is connected to the socket 12, and the width of the through groove is smaller than the width of the card groove. A guide block 14 is slidably arranged inside the guide groove 13, and the guide block 14 includes a bottom The bottom block and the slider are fixedly arranged on the top of the bottom block, and one end of the slider is fixedly connected to the bottom of the blade 4. The diameter of the bottom block is the same as the diameter of the socket 12, and the diameter of the slider is the same as the width of the slot. The bottom block is symmetrically and fixedly connected with a triangular block 15 on one side close to the slider. The cross section of the triangular block 15 is a right triangle, and the triangular block 15 is made of elastic material. The elastic material can have a certain resilience to fill the gap between the blade 4 and the bottom plate 1. The addition of the triangular block 15 can tighten the blade 4 as the guide block 14 moves, avoiding the formation of a gap between the blade 4 and the bottom plate 1, and the guide block 14 and the guide groove 13 slide with each other.

[0036] By cooperating with the guide groove 13 and the guide block 14, the blade 4 and the other end of the base plate can be fixed. Both ends of the blade 4 are fixed to the base plate 1 to ensure the stability of the connection. The socket 12 facilitates the insertion of the guide block 14, so that the guide block 14 is located at one end of the guide groove 13, and the guide block 14 is moved to the inside of the guide groove 13, so that the blade 4 and the base plate 1 can be fixed through the cooperation of the guide block 14 and the guide groove 13 to avoid separation between the blade 4 and the base plate 1. At the same time, the socket 12 can remove the guide block 14 from the inside of the guide groove 13 to facilitate separation of the blade 4 and the base plate 1. The cross-sections of the guide groove 13 and the guide block 14 are both T-shaped, which can achieve sliding cooperation between the guide block 14 and the guide groove 13 and avoid separation between the base block and the blade 4.

[0037] An arc-shaped fixing block 7 is provided on the top of the blade 4. The fixing block 7 is a semicircular ring. Several fixing blocks 7 are arranged in a circle, and the inner arc surface of the fixing block 7 faces the end away from the mounting tube 2. The fixing blocks 7 are fixedly connected to the corresponding blades 4 respectively. The outer part of the fixing block 7 is clamped with a locking piece 8. The locking piece 8 includes a semi-ring 9, a clamping block 10 and a clamping seat 11. The cross section of the semi-ring 9 is circular. The cross-sectional curvature of the semi-ring 9 is adapted to the inner curvature of the fixing block 7. The circular design can fit the curvature of the fixing block 7 to ensure the stability of the restriction. The semi-circular design of the fixing block 7 can limit the locking piece 8, so that after the locking piece 8 fixes the fixing block 7, the fixing The block 7 can also limit the locking piece 8 to prevent the fixing block 7 and the locking piece 8 from moving in the direction perpendicular to the bottom plate 1 and causing the fixing block 7 and the locking piece 8 to separate. Two semi-rings 9 are provided, and the two ends of the two semi-rings 9 are respectively connected with a clamping block 10 and a clamping seat 11. The clamping block 10 and the clamping seat 11 can be clamped with each other. A through hole 16 is opened on the clamping block 10, and a limiting bolt 17 is passed through the through hole 16. The limiting bolt 17 and the clamping seat 11 are threadedly matched. The limiting bolt 17 is used to facilitate the limiting and fixing of the clamping block 10 and the clamping seat 11 to prevent the bottom block and the base from being separated during long-term use. At the same time, the through hole 16 is used for the limiting bolt 17 to pass through.

[0038] Two half rings 9 can be mounted on the outside of several fixed blocks 7 in the form of a clamp, and then connected by the clamping blocks 10 and the clamping seats 11 at both ends of the two half rings 9, so as to complete the clamping of all blades 4 and prevent the blades 4 from moving in a direction parallel to the plane of the base plate 1, thereby achieving fixation. At the same time, the fixing method of the locking piece 8 can achieve the effect of quickly installing and removing all blades 4, thereby ensuring the efficiency of maintenance.

[0039] When the blade 4 needs to be replaced or maintained, the locking piece 8 is first opened. The locking piece 8 will remove the restriction on the fixing block 7, so that the fixing blocks 7 can move in a direction away from the axis of the mounting tube 2, thereby driving the blade 4 to move, that is, driving the clamping column 6 to move out of the recess 5, thereby realizing the replacement or maintenance of a single blade 4 and avoiding the trouble of overall replacement.

[0040] Working principle:

[0041] Use the installation port 3 to connect with the output end of the centrifugal pump, and pass the bolt through the through-hole 16 and cooperate with the thread of the through-hole 16. One end of the bolt will contact the shaft end of the centrifugal pump to form a clamping connection to avoid separation. The centrifugal pump drives the installation pipe 2 to rotate, and the installation pipe 2 will drive the bottom plate 1 to rotate, so that the bottom plate 1 will drive the blades 4 to rotate, and the flow channels between adjacent blades 4 will also rotate synchronously, so that the fluid is driven through the blades 4 and the flow channels.

[0042] When maintenance is required, first unscrew the fastening bolts, and stagger the opposite ends of the two half rings 9 to achieve the separation of the corresponding block 10 and the seat 11, and remove the two half rings 9 from the inner arc of the fixing block 7, thereby removing the restriction on the fixing block 7 in the plane parallel to the bottom plate 1, so that the blade 4 can move horizontally inside the plane parallel to the bottom plate 1, that is, pull the blade 4 to be replaced, so that the blade 4 drives the clamping column 6 to move, so that the clamping column 6 and the recess 5 are separated, and at the same time, the blade 4 will also drive the guide block 14 to move, and the guide block 14 will move inside the guide groove 13 until the guide block 14 moves to the inside of the socket 12, and then pull the blade 4 in a direction perpendicular to the bottom plate 1, and the blade 4 will drive the guide block 14 to move along the axial direction of the socket 12, that is, move the guide block 14 out of the socket 12, complete the separation between the blade 4 and the bottom plate 1, and then install the new blade 4 in the same way, that is, complete the replacement of the blade 4, no need to disassemble the whole, reduce costs, and simple maintenance.

Claims

1. A centrifugal pump head guide impeller, characterized in that: The invention comprises a base plate (1), a mounting tube (2) is fixedly connected to one side surface of the base plate (1), the mounting tube (2) and the base plate (1) are concentric, one end of the mounting tube (2) is provided with a mounting opening (3), a plurality of blades (4) are evenly arranged on the base plate (1), a plurality of recesses (5) corresponding to the blades (4) are evenly arranged on the outer side surface of the mounting tube (2), a retaining column (6) is clamped inside the recess (5), the retaining column (6) is fixedly connected to one end of the blade (4), an arc-shaped fixing block (7) is provided on the top of the blade (4), a plurality of the fixing blocks (7) are arranged in a circumference, and a locking piece (8) is clamped outside the fixing block (7).

2. A centrifugal pump head guide impeller according to claim 1, characterized in that: The locking member (8) comprises a half ring (9), a clamping block (10) and a clamping seat (11); two half rings (9) are provided, and the two ends of the two half rings (9) are respectively connected with a clamping block (10) and a clamping seat (11); the clamping block (10) and the clamping seat (11) can be clamped with each other.

3. A centrifugal pump head guide impeller according to claim 1, characterized in that: The bottom plate (1) is provided with a socket (12), the socket (12) is provided with a guide groove (13) in the direction of the recess (5), the guide groove (13) is communicated with the socket (12), a guide block (14) is slidably arranged inside the guide groove (13), the diameter of the socket (12) is larger than the guide block (14), and the guide block (14) and the blade (4) are fixedly connected.

4. A centrifugal pump head guide impeller according to claim 3, characterized in that: The cross section of the guide groove (13) is T-shaped, and the cross section of the guide block (14) is T-shaped to match the guide groove (13).

5. The centrifugal pump head guide impeller according to claim 3, characterized in that: A triangular block (15) is provided on the upper top of the guide block (14).

6. A centrifugal pump head guide impeller according to claim 1, characterized in that: The fixing block (7) is semicircular in shape, and the inner arc surface of the fixing block (7) faces the side away from the mounting tube (2).

7. A centrifugal pump head guide impeller according to claim 2, characterized in that: The cross section of the semi-ring (9) is circular, and the cross-sectional curvature of the semi-ring (9) is adapted to the inner curvature of the fixing block (7).

8. The centrifugal pump head guide impeller according to claim 2, characterized in that: The clamping block (10) is provided with a through opening (16), a limiting bolt (17) is passed through the through opening (16), and the limiting bolt (17) and the clamping seat (11) are threadedly matched.

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