Centrifugal pump structure with impeller convenient to replace

Abstract

The utility model discloses a centrifugal pump structure with an impeller convenient to replace, which relates to the technical field of centrifugal pumps and comprises a base, a shell is mounted on the left portion of the upper end of the base, a motor is mounted on the right portion of the upper end of the base, an end cover is connected to the right end of the shell, and the impeller is arranged at the left end of the end cover. A fixed ring is fixedly connected to the right end of the end cover, a movable ring is movably arranged in the fixed ring in a sleeved mode, a connecting shaft is fixedly arranged in the impeller in a sleeved mode, the right end of the connecting shaft movably penetrates through the end cover and the right end of the movable ring in sequence and extends to the right side of the movable ring, and a fixing part is installed on the upper portion of the outer surface of the fixed ring. A fixing hole is formed in the upper portion of the outer surface of the connecting shaft. According to the utility model, the impeller can be quickly disassembled by arranging the fixing part, the impeller can be conveniently replaced subsequently, tools are not needed for disassembly, the operation is simple, the operation steps and the labor amount of workers are reduced, and the disassembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a centrifugal pump structure which is convenient for replacing an impeller. Background Art

[0002] A centrifugal pump is a vane pump that transports liquids by the centrifugal force generated by the rotation of the impeller. During the rotation of the impeller, due to the interaction between the blades and the liquid, the blades transfer mechanical energy to the liquid, which increases the pressure of the liquid and achieves the purpose of transporting the liquid. Centrifugal pumps are available in vertical, horizontal, single-stage, multi-stage, single-suction, double-suction, self-priming and other types. They are widely used in industrial and urban water supply and drainage, energy, metallurgy, chemical industry, textile, papermaking, petroleum, electricity, papermaking, food, pharmaceuticals and synthetic fiber sectors.

[0003] Most of the existing impellers are fixed to the end cover with bolts. When disassembling, tools are needed to disassemble, which is cumbersome and increases the operating steps and labor of workers, affecting the disassembly efficiency. Further improvement is needed. For this reason, we propose a centrifugal pump structure that is easy to replace the impeller. Utility Model Content

[0004] The main purpose of the utility model is to provide a centrifugal pump structure which is convenient for replacing the impeller, and can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A centrifugal pump structure that is easy to replace an impeller, includes a base, a shell is installed on the upper left part of the base, a motor is installed on the upper right part of the base, the right end of the shell is connected to the end cover, the left end of the end cover is provided with an impeller, the right end of the end cover is fixedly connected to a fixing ring, the internal movable sleeve of the fixing ring is provided with a movable ring, the internal fixed sleeve of the impeller is provided with a connecting shaft, the right end of the connecting shaft movably passes through the end cover and the right end of the movable ring in turn and extends to the right side of the movable ring, a fixing component is installed on the upper outer surface of the fixing ring, and a fixing hole is opened on the upper outer surface of the connecting shaft.

[0007] Preferably, a through groove is provided inside the movable ring, and the through groove is located above the fixing hole.

[0008] Preferably, a circular groove is provided on the inner cylindrical surface of the fixing ring, the circular groove is located above the through groove, and limiting grooves are provided on the left inner wall and the right inner wall of the circular groove.

[0009] Preferably, the fixing component includes a U-shaped frame, which is installed on the outer surface of the fixing ring, and an electromagnet No. 1 is installed on the upper inner wall of the U-shaped frame, and an electromagnet No. 2 is arranged on the lower side of the electromagnet No. 1, and a connecting rod is installed at the lower end of the electromagnet No. 2, and the lower end of the connecting rod is movably inserted into the circular groove and fixedly connected to the electromagnet No. 3, and two limit blocks symmetrically distributed on the left and right are installed on the outer surface of the electromagnet No. 3, and a fixing rod is arranged at the lower end of the electromagnet No. 3, and the lower end of the fixing rod passes through the through groove and extends into the fixing hole, and the two limit blocks are respectively located in the two limit grooves.

[0010] Preferably, the ends of the fixing rod and the third electromagnet that are close to each other are both arc-shaped structures, and the upper end of the fixing rod matches the inner circular surface of the fixing ring and the lower end of the third electromagnet.

[0011] Preferably, a positioning hole is opened on the front of the outer surface of the connecting shaft, a positioning rod is arranged on the front side of the positioning hole, and the positioning rod is slidably connected to the fixing ring.

[0012] Preferably, the output end of the connecting shaft is movably sleeved on the output end of the motor.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The impeller can be quickly disassembled by setting a fixing component. When in use, disconnect the power of the No. 2 electromagnet and the No. 1 electromagnet, turn on the power of the No. 3 electromagnet, pull the No. 2 electromagnet up and down, the No. 2 electromagnet drives the No. 3 electromagnet to move upward through the connecting rod, and the No. 3 electromagnet drives the fixing rod to move upward through the magnetic force, so that the fixing rod is away from the fixing hole, and the connecting shaft and the impeller can be removed from the end cover to complete the disassembly, which is convenient for the subsequent replacement of the impeller. No tools are required for disassembly, the operation is simple, the operation steps and labor of workers are reduced, and the disassembly efficiency is improved;

[0015] 2. The positioning rod and the positioning hole can be used together to facilitate the positioning of the connecting shaft. Before disassembly, rotate the connecting shaft so that the positioning rod can be inserted into the positioning hole to prevent the connecting shaft from rotating. The fixing rod can be aligned with the circular groove, which facilitates the upward movement of the fixing rod, reducing the time for later debugging and further improving the disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the entire structure proposed in this embodiment;

[0017] Figure 2 Schematic diagram of the structure of the impeller in this embodiment;

[0018] Figure 3Schematic diagram of the structure of the connecting shaft in this embodiment;

[0019] Figure 4 Schematic diagram of the structure of the end cover in this embodiment;

[0020] Figure 5 It is a schematic diagram of the local structure in this embodiment.

[0021] In the figure: 1. base; 2. motor; 3. casing; 4. end cover; 5. fixing ring; 6. movable ring; 7. fixing part; 8. connecting shaft; 9. impeller; 10. positioning rod; 11. positioning hole; 12. fixing hole; 13. circular groove; 14. limiting groove; 15. through groove; 71. U-shaped frame; 72. No. 1 electromagnet; 73. No. 2 electromagnet; 74. connecting rod; 75. No. 3 electromagnet; 76. limiting block; 77. fixing rod. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figure 1-Figure 5As shown, a centrifugal pump structure which is convenient for replacing an impeller comprises a base 1, a casing 3 is mounted on the left upper end of the base 1, a motor 2 is mounted on the right upper end of the base 1, an end cover 4 is connected to the right end of the casing 3, an impeller 9 is arranged on the left end of the end cover 4, a fixing ring 5 is fixedly connected to the right end of the end cover 4, a movable ring 6 is arranged on the inner movable sleeve of the fixing ring 5, a connecting shaft 8 is arranged on the inner fixed sleeve of the impeller 9, the right end of the connecting shaft 8 movably passes through the right end of the end cover 4 and the movable ring 6 in turn and extends to the right side of the movable ring 6, a fixing component 7 is mounted on the upper outer surface of the fixing ring 5, and a fixing hole 12 is opened on the upper outer surface of the connecting shaft 8.

[0026] A through groove 15 is provided inside the movable ring 6, and a circular groove 13 is provided on the inner cylindrical surface of the fixed ring 5. The circular groove 13 is located above the through groove 15. The left inner wall and the right inner wall of the circular groove 13 are both provided with limiting grooves 14. When the impeller 9 is removed, the through groove 15 is located above the fixing hole 12, and the circular groove 13 is located above the through groove 15.

[0027] In order to facilitate the subsequent replacement of the impeller 9, there is no need to use tools for disassembly. The impeller 9 can be quickly disassembled through the fixing component 7. The operation is simple, the operation steps and labor of the workers are reduced, and the disassembly efficiency is improved. The fixing component 7 includes a U-shaped frame 71, and the U-shaped frame 71 is installed on the outer surface of the fixing ring 5. The upper inner wall of the U-shaped frame 71 is installed with an electromagnet No. 1 72, and the lower side of the electromagnet No. 1 72 is provided with an electromagnet No. 2 73. Initially, the power supply of the electromagnet No. 1 72 and the electromagnet No. 2 73 is turned on, and the magnetism of the side where the electromagnet No. 1 72 and the electromagnet No. 2 73 are close to each other is the same, and the row between the electromagnet No. 1 72 and the electromagnet No. 2 73 The repulsive force is greater than the centrifugal force generated when the fixed rod 77 rotates. A connecting rod 74 is installed at the lower end of the No. 2 electromagnet 73. The lower end of the connecting rod 74 is movably inserted into the circular groove 13 and fixedly connected to the No. 3 electromagnet 75. Two limit blocks 76 symmetrically distributed on the left and right are installed on the outer surface of the No. 3 electromagnet 75. The limit blocks 76 are used to limit the downward movement distance of the No. 3 electromagnet 75 to avoid entering the through groove 15. A fixing rod 77 is provided at the lower end of the No. 3 electromagnet 75. The No. 3 electromagnet 75 is used to adsorb the fixing rod 77. The lower end of the fixing rod 77 passes through the through groove 15 and extends into the fixing hole 12. The two limit blocks 76 are respectively located in the two limit grooves 14.

[0028] The ends of the fixed rod 77 and the third electromagnet 75 that are close to each other are both arc-shaped structures, and the upper ends of the fixed rod 77 match the inner circular surface of the fixed ring 5 and the lower end of the third electromagnet 75. When the fixed rod 77 rotates, it is in active contact with the inner circular surface of the fixed ring 5 and the lower end of the third electromagnet 75.

[0029] In order to enable the fixing rod 77 to align with the circular groove 13, facilitate the upward movement of the fixing rod 77 and reduce the time for later debugging, the position of the connecting shaft 8 is positioned by cooperating with the positioning rod 10 and the positioning hole 11, thereby further improving the disassembly efficiency. A positioning hole 11 is provided on the front surface of the outer surface of the connecting shaft 8, and a positioning rod 10 is provided on the front side of the positioning hole 11. The diameter of the positioning rod 10 is equal to the inner diameter of the positioning hole 11, and the positioning rod 10 is slidably connected to the fixing ring 5.

[0030] The output end of the connecting shaft 8 is movably sleeved on the output end of the motor 2, and the motor 2 drives the connecting shaft 8 to rotate through a flat key.

[0031] The utility model provides a centrifugal pump structure that is convenient for replacing the impeller. When disassembling, the connecting shaft 8 is rotated so that the positioning rod 10 can be inserted into the positioning hole 11 to prevent the connecting shaft 8 from rotating. The housing 3 is disassembled, the power supply of the second electromagnet 73 and the first electromagnet 72 is disconnected, the power supply of the third electromagnet 75 is turned on, the second electromagnet 73 is pulled up and down, the second electromagnet 73 drives the third electromagnet 75 to move upward through the connecting rod 74, and the third electromagnet 75 drives the fixing rod 77 to move upward through the magnetic force, so that the fixing rod 77 is away from the fixing hole 12, and the positioning rod 10 is moved outward. , the connecting shaft 8 and the impeller can be removed from the end cover 4 to complete the disassembly. When replacing, insert the connecting shaft 8 on the impeller 9 into the movable ring 6, rotate the connecting shaft 8 so that the positioning rod 10 can be inserted into the positioning hole 11, disconnect the power supply of the third electromagnet 75, and the fixing rod 77 moves downward to the fixing hole 12 under the force of gravity, and turn on the power of the second electromagnet 73 and the first electromagnet 72. Since the ends of the second electromagnet 73 and the first electromagnet 72 that are close to each other have the same magnetic properties, a repulsive force is generated to push the second electromagnet 73 downward to prevent the fixing rod 77 from moving into the circular groove 13, and the replacement can be completed.

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A centrifugal pump structure for facilitating replacement of an impeller, comprising a base (1), characterized in that: A casing (3) is installed at the left upper end of the base (1), a motor (2) is installed at the right upper end of the base (1), the right end of the casing (3) is connected to an end cover (4), an impeller (9) is arranged at the left end of the end cover (4), a fixing ring (5) is fixedly connected to the right end of the end cover (4), a movable ring (6) is arranged inside the movable sleeve of the fixing ring (5), a connecting shaft (8) is arranged inside the fixed sleeve of the impeller (9), the right end of the connecting shaft (8) movably penetrates the end cover (4) and the right end of the movable ring (6) in turn and extends to the right side of the movable ring (6), a fixing component (7) is installed on the upper outer surface of the fixing ring (5), and a fixing hole (12) is opened on the upper outer surface of the connecting shaft (8).

2. The centrifugal pump structure for facilitating impeller replacement according to claim 1, characterized in that: A through groove (15) is provided inside the movable ring (6), and the through groove (15) is located above the fixing hole (12).

3. The centrifugal pump structure for facilitating impeller replacement according to claim 2, characterized in that: The inner cylindrical surface of the fixing ring (5) is provided with a circular groove (13), the circular groove (13) is located above the through groove (15), and the left inner wall and the right inner wall of the circular groove (13) are both provided with limiting grooves (14).

4. The centrifugal pump structure for facilitating impeller replacement according to claim 3, characterized in that: The fixing component (7) comprises a U-shaped frame (71), the U-shaped frame (71) is mounted on the outer surface of the fixing ring (5), a No. 1 electromagnet (72) is mounted on the upper inner wall of the U-shaped frame (71), a No. 2 electromagnet (73) is arranged on the lower side of the No. 1 electromagnet (72), a connecting rod (74) is mounted on the lower end of the No. 2 electromagnet (73), the lower end of the connecting rod (74) is movably inserted into the circular groove (13) and fixedly connected to the No. 3 electromagnet (75), two symmetrically distributed limit blocks (76) are mounted on the outer surface of the No. 3 electromagnet (75), a fixing rod (77) is arranged on the lower end of the No. 3 electromagnet (75), the lower end of the fixing rod (77) passes through the through groove (15) and extends into the fixing hole (12), and the two limit blocks (76) are respectively located in the two limit grooves (14).

5. The centrifugal pump structure for easy impeller replacement according to claim 4 is characterized in that: The ends of the fixing rod (77) and the third electromagnet (75) that are close to each other are both arc-shaped structures, and the upper end of the fixing rod (77) matches the inner circular surface of the fixing ring (5) and the lower end of the third electromagnet (75).

6. The centrifugal pump structure for facilitating impeller replacement according to claim 1, characterized in that: A positioning hole (11) is provided on the front of the outer surface of the connecting shaft (8), a positioning rod (10) is provided on the front side of the positioning hole (11), and the positioning rod (10) is slidably connected to the fixing ring (5).

7. The centrifugal pump structure for facilitating impeller replacement according to claim 1, characterized in that: The output end of the connecting shaft (8) is movably sleeved on the output end of the motor (2).

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