Multi-stage centrifugal pump

Abstract

The utility model discloses a multistage centrifugal pump, which relates to the field of centrifugal pumps, and comprises two support frames, the two support frames are arranged in parallel, a protective cylinder is fixed on the two support frames, the inside of the protective cylinder is rotatably connected with a pump shaft, two sides of the top end of the protective cylinder are respectively connected with an input port and a discharge port, and the two sides of the top end of the pump shaft are respectively connected with the pump shaft. A filtering mechanism is installed in the input port, when water flow passes through a filtering net cylinder, silt and particles in an input water source can be intercepted and stored in the filtering net cylinder, when the water flow passes through two first silica gel blocks, the two first silica gel blocks can be bent through impact force of the water flow, and the water flow can enter conveniently; meanwhile, the effect of buffering water flow is achieved, the situation that the filter screen cylinder is damaged due to the fact that water flow impact is too large is avoided, meanwhile, when silt and particles enter the filter screen cylinder, the two first silica gel blocks can prevent the silt from flowing back out, and the effect of storing the silt is achieved.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal pumps, in particular to a multi-stage centrifugal pump. Background Art

[0002] A multi-stage centrifugal pump is a combination of two or more centrifugal pumps with the same function. In terms of fluid channel structure, the medium pressure relief port of the first stage is connected to the inlet of the second stage, and the medium pressure relief port of the second stage is connected to the inlet of the third stage. Such a series mechanism forms a multi-stage centrifugal pump. The significance of a multi-stage centrifugal pump is to increase the set pressure. The centrifugal pump works by rotating the impeller to cause the water to undergo centrifugal motion. Before starting the water pump, the pump casing and the suction pipe must be filled with water, and then the motor is started so that the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, and flows into the water pressure pipeline of the water pump through the flow channel of the volute pump casing.

[0003] When the centrifugal pumps of the prior art are used in mines and other places, when the wastewater from the mines is pumped, the wastewater is often mixed with particles such as gravel, and the diameters and hardnesses of the particles are different. When the particles are mixed in the sewage and sucked into the pump body, they will impact the impeller, causing varying degrees of damage to the impeller. If the diameter of the particles is large, it is very easy to cause the impeller to bend when impacting the impeller, directly affecting the rotation posture of the impeller. The unstable rotation of the impeller will cause the stability of the pump body to decrease, and further lead to damage to the pump body.

[0004] Therefore, it is necessary to propose a multi-stage centrifugal pump to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-stage centrifugal pump to solve the problem that when wastewater from a mine is pumped, the wastewater is often mixed with particles such as gravel, and the particles have different diameters and hardnesses. When the particles are mixed in the sewage and sucked into the pump body, they will impact the impeller, causing varying degrees of damage to the impeller. If the particle diameter is large, it is very easy to cause the impeller to bend when impacting the impeller, directly affecting the rotation posture of the impeller. The unstable rotation of the impeller will cause the stability of the pump body to decrease, and further lead to damage to the pump body.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-stage centrifugal pump, comprising a support frame, wherein two support frames are arranged in parallel, and a protective cylinder is fixed to the two support frames, and the internal rotation of the protective cylinder is connected to the pump shaft, and the two sides of the top of the protective cylinder are respectively connected to the input port and the discharge port, and a filter mechanism is installed in the input port, and the filter mechanism includes a protruding ring and a filter mesh cylinder, and the protruding ring is fixed to the top of the filter mesh cylinder, and first silicone blocks are fixed on both sides of the top of the filter mesh cylinder, and second silicone blocks are fixed on both sides of the bottom of the filter mesh cylinder, and the two second silicone blocks are distributed in a V shape, and the tip of the V-shaped structure faces upward, and the two first silicone blocks are arranged in parallel.

[0007] Preferably, a plurality of through holes for water to flow through are provided on the two second silica gel blocks and the two first silica gel blocks, and a distance is left between the two second silica gel blocks, and a distance is left between the two first silica gel blocks.

[0008] Preferably, a slot is provided at the top of the input port, and the protruding ring is fixedly engaged in the slot.

[0009] Preferably, a resistance block is fixed to the bottom end of the outer side of the filter screen cylinder, the resistance block is in contact with the inner wall of the input port, and the resistance block is elastic.

[0010] Preferably, a plurality of impellers are fixed to the outside of the pump shaft, the plurality of impellers are arranged inside the protective cylinder, and the plurality of impellers are distributed in parallel, with a spacing between each two impellers, and the spacing between each two impellers is consistent.

[0011] Preferably, shaft holders are fixed inside the two support frames, both ends of the pump shaft extend out of the two ends of the protective tube, and the two extended ends are rotatably connected to the corresponding shaft holders respectively, and multiple connecting rods are fixed between the two support frames.

[0012] The technical effects and advantages of this utility model are:

[0013] 1. In the actual operation of the present invention, the filter mechanism can be installed inside the input port by snapping, which is convenient for installation and disassembly. However, when the water flows through the filter mesh, the silt and particles in the input water source will be intercepted and stored inside the filter mesh. When the water flows through the two first silica gel blocks, the impact force of the water flow will cause the two first silica gel blocks to bend, facilitating the entry of the water flow. At the same time, it also plays a role in buffering the water flow, preventing the water flow from being too strong and causing damage to the filter mesh. At the same time, when silt and particles enter the filter mesh, the two first silica gel blocks can prevent the silt from flowing back out, thereby playing a role in preserving the silt.

[0014] 2. When water flows through the two second silicone blocks, the impact of the water flow will cause the two second silicone blocks to bend downward, which can improve the effect of buffering the water flow and prevent the sediment in the water flow from accumulating at the bottom of the filter cylinder, causing blockage and affecting the passage of water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the multi-stage centrifugal pump of the utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of the protective tube of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the clamping groove and the protruding ring of the utility model.

[0018] Figure 4 This is a schematic structural diagram of the first silica gel block of the present invention.

[0019] In the figure: 1. Support frame; 2. Protective cylinder; 3. Pump shaft; 4. Inlet; 5. Discharge port; 6. Connecting rod; 7. Impeller; 8. Shaft holder; 9. Slot; 10. Protruding ring; 11. Filter cylinder; 12. Resistance block; 13. First silicone block; 14. Second silicone block; 15. Through hole. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clarify the technical solutions in the embodiments of the present invention; it is clear that the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The utility model provides Figure 1 - Figure 4 A multi-stage centrifugal pump shown includes a support frame 1, two support frames 1 are arranged in parallel, and the two support frames 1 are fixed with a protective cylinder 2, and the interior of the protective cylinder 2 is rotatably connected to the pump shaft 3. The interior of the two support frames 1 is fixed with a shaft holder 8, and both ends of the pump shaft 3 extend out of the two ends of the protective cylinder 2, and the two extended ends are respectively rotatably connected to the corresponding shaft holder 8. A plurality of connecting rods 6 are fixed between the two support frames 1, and a plurality of impellers 7 are fixed to the outside of the pump shaft 3. The plurality of impellers 7 are arranged inside the protective cylinder 2, and the plurality of impellers 7 are distributed in parallel, with a spacing between the two impellers 7, and the spacing between the two impellers 7 is consistent. The two sides of the top of the protective cylinder 2 are respectively connected to the input port 4 and the discharge port 5.

[0022] In the actual operation of the present invention, when one end of the pump shaft 3 is connected to a driving device, such as a motor, the motor can drive the pump shaft 3 and multiple impellers 7 to rotate, and water is input from the input port 4. The water can be discharged from the discharge port 5 by the drive of the multiple impellers 7. Since multiple impellers 7 are added, the water pressure can be increased.

[0023] A filter mechanism is installed in the input port 4 . A clamping groove 9 is provided at the top of the input port 4 . A protruding ring 10 is clamped and fixed inside the clamping groove 9 .

[0024] The filtering mechanism includes a protruding ring 10 and a filter cylinder 11. The protruding ring 10 is fixed to the top of the filter cylinder 11. First silicone blocks 13 are fixed on both sides of the top of the filter cylinder 11. Second silicone blocks 14 are fixed on both sides of the bottom of the filter cylinder 11. The two second silicone blocks 14 are distributed in a V shape, and the tip of the V-shaped structure is facing upward. The two first silicone blocks 13 are arranged in parallel.

[0025] A plurality of through holes 15 for water to flow through are provided on the two second silica gel blocks 14 and the two first silica gel blocks 13 , and a distance is left between the two second silica gel blocks 14 and a distance is left between the two first silica gel blocks 13 .

[0026] In the actual operation of the present invention, the filter mechanism can be installed inside the input port 4 by snapping, which is convenient for installation and disassembly. When the water flows through the filter mesh tube 11, the mud and particles in the input water source will be intercepted and stored inside the filter mesh tube 11. When the water flows through the two first silica gel blocks 13, the impact force of the water flow will cause the two first silica gel blocks 13 to bend, which is convenient for the water flow to enter. At the same time, it also plays a role in buffering the water flow, avoiding excessive impact of the water flow, which causes the filter mesh tube 11 to be damaged. At the same time, when mud and particles enter the filter mesh tube 11, the two first silica gel blocks 13 can prevent the mud and sand from flowing back out, thereby playing a role in preserving the mud and sand.

[0027] When water flows through the two second silicone blocks 14, the impact of the water flow will cause the two second silicone blocks 14 to bend downward, which can improve the effect of buffering the water flow and prevent the sediment in the water flow from accumulating at the bottom end of the filter cylinder 11, causing blockage and affecting the passage of water.

[0028] A resistance block 12 is fixed to the bottom end of the outer side of the filter screen cartridge 11 . The resistance block 12 abuts against the inner wall of the input port 4 . The resistance block 12 is elastic and can increase the stability of the filter screen cartridge 11 .

Claims

1. A multi-stage centrifugal pump, comprising a support frame (1), characterized in that: Two support frames (1) are arranged in parallel. The two support frames (1) are fixed with protective cylinders (2). The interior of the protective cylinder (2) is rotatably connected to a pump shaft (3). The two sides of the top of the protective cylinder (2) are respectively connected to an input port (4) and an outlet port (5). A filter mechanism is installed in the input port (4). The filter mechanism comprises a protruding ring (10) and a filter screen cylinder (11). The protruding ring (10) is fixed to the top of the filter screen cylinder (11). First silica gel blocks (13) are fixed on both sides of the top of the filter screen cylinder (11). Second silica gel blocks (14) are fixed on both sides of the bottom of the filter screen cylinder (11). The two second silica gel blocks (14) are distributed in a V shape, and the tip of the V-shaped structure faces upward. The two first silica gel blocks (13) are arranged in parallel.

2. A multi-stage centrifugal pump according to claim 1, characterized in that: The two second silica gel blocks (14) and the two first silica gel blocks (13) are both provided with a plurality of through holes (15) for water to flow through, and a distance is left between the two second silica gel blocks (14), and a distance is left between the two first silica gel blocks (13).

3. A multi-stage centrifugal pump according to claim 1, characterized in that: A clamping groove (9) is provided at the top end of the input port (4), and the protruding ring (10) is clamped and fixed inside the clamping groove (9).

4. A multi-stage centrifugal pump according to claim 1, characterized in that: A resistance block (12) is fixed to the bottom end of the outer side of the filter screen cylinder (11), and the resistance block (12) is in contact with the inner wall of the input port (4), and the resistance block (12) is elastic.

5. The multi-stage centrifugal pump according to claim 1, characterized in that: A plurality of impellers (7) are fixed on the outside of the pump shaft (3), and the plurality of impellers (7) are arranged inside the protective cylinder (2). The plurality of impellers (7) are distributed in parallel, with a spacing between each two impellers (7), and the spacing between each two impellers (7) is consistent.

6. A multi-stage centrifugal pump according to claim 1, characterized in that: A shaft holder (8) is fixed inside each of the two support frames (1), both ends of the pump shaft (3) extend out of both ends of the protective tube (2), and the two extended ends are rotatably connected to the corresponding shaft holder (8), and a plurality of connecting rods (6) are fixed between the two support frames (1).

Images