Horizontal multistage centrifugal pump

Abstract

The utility model provides a horizontal multistage centrifugal pump, including water pump main part and motor main body, water pump main part includes front pump shell, rear pump shell, a plurality of independent impeller and fixed assembly, the impeller sets up between front pump shell and rear pump shell, be provided with the water inlet on front pump shell, be provided with the water outlet on rear pump shell, fixed assembly sets up on motor main body and front pump shell and is used for driving front pump shell, rear pump shell clamping impeller, fixed assembly is detachable setting, through setting detachable fixed assembly, have made things convenient for to the installation and disassembly of impeller, are convenient for the maintenance and replacement to impeller, improved maintenance efficiency, reduced maintenance cost.

Description

Technical Field

[0001] This utility model relates to water pumps, and more particularly to a horizontal multistage centrifugal pump. Background Technology

[0002] Currently, Chinese patent CN222228873U discloses a horizontal multistage centrifugal pump, including a drive motor, a mounting bracket, a pump body, and a rotating shaft. The output end of the drive motor is coaxially and fixedly connected to the rotating shaft. The pump body is coaxially provided with a mounting cylinder, and a mounting cavity is provided between the pump body and the mounting cylinder. An impeller is coaxially provided on the rotating shaft, and a sealing partition is provided between the two sets of impellers.

[0003] The aforementioned patents still have shortcomings. All impellers in the aforementioned patents are fixed and cannot be disassembled or added. When the factory's equipment increases, the existing pump body needs to be replaced as a whole to meet the higher head requirements, resulting in high maintenance costs and poor flexibility. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a horizontal multistage centrifugal pump with the function of adding an impeller separately.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a horizontal multistage centrifugal pump, including a pump body and a motor body. The pump body includes a front pump casing, a rear pump casing, several independent impellers and a fixing assembly. The impellers are disposed between the front pump casing and the rear pump casing. The front pump casing is provided with an inlet and the rear pump casing is provided with an outlet. The fixing assembly is disposed on the motor body and the front pump casing and is used to drive the front pump casing and the rear pump casing to clamp the impellers. The fixing assembly is detachable.

[0006] Preferably, the fixing component includes a pull rod and a fixing nut. The rear pump housing is fixed to the motor body. The motor body is provided with a mounting plate on one side close to the rear pump housing. One end of the pull rod is provided with a pull head and presses against the front pump housing. The other end is provided with a thread and passes through the mounting plate. The fixing nut is fixed to the pull rod by the thread and pulls the front pump housing and the mounting plate together.

[0007] Preferably, a sleeve is also fixedly provided at the tail of the fixing nut, and the tail of the pull rod extends into the sleeve.

[0008] Preferably, the tail end of the sleeve is sealed, and the sleeve is made of rubber.

[0009] Preferably, it also includes a base, one end of which is fixed to the rear pump housing and the other end of which is fixed to the tail of the motor body.

[0010] Preferably, a counterweight rod is provided at the tail of the motor body, and a counterweight ring is provided on the counterweight rod, and the counterweight ring is connected to the counterweight rod by a thread.

[0011] Preferably, the impeller includes a housing, blades, and a central shaft. The blades are disposed inside the housing, and the central shaft is fixedly disposed with the blades. The central shaft has a hexagonal head on one side and a hexagonal hole on the other side.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting up detachable fixing components, the installation and removal of the impeller are facilitated, making it easier to maintain and replace the impeller, thus improving maintenance efficiency and reducing maintenance costs; 2. The combination of tie rod and fixing nut can reliably tighten the front pump casing to the mounting plate, ensuring that the impeller will not loosen during operation, thus improving the stability and safety of the water pump operation; 3. By setting a rubber sleeve and extending the tail of the tie rod into the sleeve, the threaded part of the tie rod can be protected, preventing the thread from being contaminated or corroded by external impurities, and preventing the bolts at the rear end of the tie rod from becoming unusable when adding an impeller. 4. By setting a counterweight rod and a counterweight ring, and connecting the counterweight ring and the counterweight rod with threads, the position of the counterweight ring can be adjusted according to actual needs, thereby adjusting the balance performance of the water pump and reducing noise and vibration during operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of Example 1. Figure 1 ; Figure 2 This is a schematic diagram of the structure of Example 1. Figure 2 ; Figure 3 This is a cross-sectional view of the fixed component; Figure 4 This is a cross-sectional schematic diagram of the impeller in Example 2.

[0014] Reference numerals in the attached drawings: 1. Pump body; 2. Motor body; 3. Front pump casing; 4. Rear pump casing; 5. Impeller; 6. Fixing assembly; 7. Inlet; 8. Outlet; 9. Tie rod; 10. Fixing nut; 11. Mounting plate; 12. Pull head; 13. Sleeve; 14. Base; 15. Counterweight rod; 16. Counterweight ring; 17. Outer casing; 18. Blade; 19. Central shaft; 20. Hexagonal head; 21. Hexagonal hole. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered. Example 1:

[0016] A horizontal multistage centrifugal pump includes a pump body 1 and a motor body 2. The pump body 1 includes a front pump casing 3, a rear pump casing 4, several independent impellers 5, and a fixing assembly 6. The impellers 5 are disposed between the front pump casing 3 and the rear pump casing 4. The front pump casing 3 is provided with an inlet 7, and the rear pump casing 4 is provided with an outlet 8. The fixing assembly 6 is disposed on the motor body 2 and the front pump casing 3 and is used to drive the front pump casing 3 and the rear pump casing 4 to clamp the impellers 5. The fixing assembly 6 is detachable. The connection between the motor body 2 and the last stage impeller 5 transmits power to the central shaft 19 of the impeller 5, driving the impeller 5 to rotate at high speed, thereby realizing the step-by-step pressurization and transportation of liquid.

[0017] The fixing assembly 6 includes four tie rods 9 and fixing nuts 10. The rear pump housing 4 is fixed to the motor body 2. A mounting plate 11 is provided on the side of the motor body 2 close to the rear pump housing 4. One end of the tie rod 9 is provided with a pull head 12 and presses against the front pump housing 3. The other end is provided with a thread and passes through the mounting plate 11. The fixing nuts 10 are fixed to the tie rods 9 by the threads, and tighten the front pump housing 3 and the mounting plate 11. By tightening the fixing nuts 10, the tie rods 9 drive the front pump housing 3 to move towards the mounting plate 11, so that the front pump housing 3 and the rear pump housing 4 form an axial clamping force on the impeller 5, ensuring the stable positioning of the multi-stage impeller 5 under high-speed operation. A sealing ring is provided between the front pump housing 3, the rear pump housing 4 and the impeller 5 to effectively prevent interstage liquid leakage and improve pump efficiency.

[0018] A sleeve 13 is also fixedly installed at the tail of the fixing nut 10. The tail of the pull rod 9 extends into the sleeve 13. The tail of the sleeve 13 is sealed. The sleeve 13 is made of rubber, which isolates external moisture and impurities, prevents the threaded part of the pull rod 9 from rusting or getting contaminated with impurities, extends its service life, and prevents the bolt at the rear end of the pull rod 9 from being unusable when the impeller 5 is added.

[0019] It also includes a base 14, one end of which is fixed to the rear pump housing 4, and the other end is fixed to the tail of the motor body 2. The tail of the motor body 2 is also provided with a counterweight rod 15, and a counterweight ring 16 is provided on the counterweight rod 15. The counterweight ring 16 is connected to the counterweight rod 15 by a thread. By setting the counterweight rod 15 and the counterweight ring 16, and the counterweight ring 16 is connected to the counterweight rod 15 by a thread, the number of counterweight rings 16 can be adjusted according to actual needs. After adding the impeller 5, the counterweight ring 16 is added, thereby adjusting the balance performance of the water pump and reducing noise and vibration during operation. Example 2:

[0020] The impeller 5 includes a housing 17, blades 18, and a central shaft 19. The blades 18 are disposed inside the housing 17, and the central shaft 19 is fixedly disposed with the blades 18. A hexagonal head 20 is provided on one side of the central shaft 19, and a hexagonal hole 21 is provided on the other side. The hexagonal head 20 can be connected to the hexagonal hole 21 of the previous stage impeller 5 to realize torque transmission and axial positioning between the impellers 5. Adjacent impellers 5 are connected by the hexagonal head 20 and the hexagonal hole 21 to form a stable transmission connection, which facilitates the rapid assembly and disassembly of multi-stage impellers 5.

[0021] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A horizontal multistage centrifugal pump, comprising a pump body (1) and a motor body (2), characterized in that: The pump body (1) includes a front pump casing (3), a rear pump casing (4), several independent impellers (5), and a fixing assembly (6). The impellers (5) are disposed between the front pump casing (3) and the rear pump casing (4). The front pump casing (3) is provided with an inlet (7), and the rear pump casing (4) is provided with an outlet (8). The fixing assembly (6) is disposed on the motor body (2) and the front pump casing (3) and is used to drive the front pump casing (3) and the rear pump casing (4) to clamp the impellers (5). The fixing assembly (6) is in the form of... The fixed assembly (6) is detachable and includes a pull rod (9) and a fixing nut (10). The rear pump housing (4) is fixed to the motor body (2). The motor body (2) is provided with a mounting plate (11) on one side close to the rear pump housing (4). One end of the pull rod (9) is provided with a pull head (12) and presses on the front pump housing (3). The other end is provided with a thread and passes through the mounting plate (11). The fixing nut (10) is fixed to the pull rod (9) by the thread and tightens the front pump housing (3) and the mounting plate (11).

2. A horizontal multistage centrifugal pump according to claim 1, characterized in that: The tail of the fixing nut (10) is also fixedly provided with a sleeve (13), and the tail of the pull rod (9) extends into the sleeve (13).

3. A horizontal multistage centrifugal pump according to claim 2, characterized in that: The sleeve (13) is sealed at the tail and is made of rubber.

4. A horizontal multistage centrifugal pump according to claim 1, characterized in that: It also includes a base (14), one end of which is fixed to the rear pump housing (4), and the other end is fixed to the tail of the motor body (2).

5. A horizontal multistage centrifugal pump according to claim 4, characterized in that: The rear end of the motor body (2) is also provided with a counterweight rod (15), and a counterweight ring (16) is provided on the counterweight rod (15). The counterweight ring (16) and the counterweight rod (15) are connected by threads.

6. A horizontal multistage centrifugal pump according to claim 1, characterized in that: The impeller (5) includes a housing (17), blades (18) and a central shaft (19). The blades (18) are disposed inside the housing (17). The central shaft (19) is fixedly disposed with the blades (18). A hexagonal head (20) is provided on one side of the central shaft (19), and a hexagonal hole (21) is provided on the other side.

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