Submersible axial flow pump water inlet horn provided with forced pre-rotation guide plate

Abstract

The utility model discloses a submersible axial-flow pump water inlet horn assembled with forced pre-rotation guide plates, which relates to the technical field of submersible axial-flow pumps and comprises a water inlet mechanism, and the water inlet mechanism comprises an assembling shell, a water inlet shell and a plurality of fixing bolts. The flow guide plate can effectively guide water flow and reduce turbulent flow generated by water flow impact, the spiral flow dividing plate can further evenly divide the water flow and generate pre-rotation, the water flow can smoothly enter the pump body to be matched with the impeller, the flow separation phenomenon of fluid at an outlet in the operation process of the water pump impeller and the poor water flow phenomena such as vortexes are improved, and the service life of the water pump impeller is prolonged. And the protection mechanism and the filter screen are additionally arranged at one end of the water inlet mechanism, so that external impurities and silt can be effectively prevented from entering the pump body, the abrasion and blockage risks of components in the pump body are reduced, and the maintenance cost and the downtime are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible axial flow pumps, in particular to a submersible axial flow pump water inlet horn equipped with a forced pre-swirl guide plate. Background Art

[0002] A submersible axial flow pump is a water pump with a large single-unit flow rate and low head. It is often used in municipal livelihood projects such as drainage, irrigation, water lifting in water plants, and water lifting in sewage treatment plants. It is very important to ensure its long-term reliable operation. During the operation of the water pump, if gas is drawn into the impeller to form bubbles, the bubbles will cause the surface of the pump blades and other flow-through surfaces to rupture, forming water hammer force, which is the so-called cavitation phenomenon.

[0003] For example, Chinese patent CN219012947U discloses a hydraulically driven submersible axial flow pump, which includes an outer cylinder, a closed chamber isolated from the outside world formed inside the outer cylinder, wherein a hydraulic cylinder is installed on the inner wall of the closed chamber, and a guide chamber is formed on the side of the outer cylinder facing away from the hydraulic cylinder, a rotating shaft connected to the hydraulic cylinder is provided in the guide chamber, and an impeller is fixedly sleeved on the rotating shaft, a base is welded to the bottom wall of the outer cylinder, movable grooves are provided at the four corners of the bottom wall of the base, the top walls of the four movable grooves are rotatably connected to the first screws, and the four first screws are threadedly sleeved with lifting frames, and the side walls of the four lifting frames are respectively in contact with the inner walls of the four movable grooves, and rollers are installed at the bottom of the four lifting frames.

[0004] The traditional submersible axial flow pump inlet horn has some inherent defects in diversion. When water flows into the water inlet horn, it is easy to produce water turbulence, thereby forming local vortexes, which will lead to a decrease in the overall efficiency of the pump and an increase in energy consumption. When the uneven water flow enters the pump body, the impeller in the pump will be subjected to uneven hydraulic loads, thereby causing increased vibration and noise of the pump, affecting the service life and operational stability of the pump. In addition, for some water flows containing impurities or sediment, the traditional water inlet horn lacks effective anti-clogging and impurity separation functions, which can easily cause wear and blockage of internal components of the pump body, increasing maintenance costs and downtime. To address the above problems, a submersible axial flow pump inlet horn equipped with a forced pre-swirl guide plate is proposed. Utility Model Content

[0005] The utility model aims to solve the problems existing in the prior art and proposes a submersible axial flow pump water inlet horn equipped with a forced pre-swirl guide plate.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a submersible axial flow pump water inlet horn equipped with a forced pre-rotation guide plate, comprising a water inlet mechanism, the water inlet mechanism comprising an assembly shell, a water inlet shell and a plurality of fixing bolts, the assembly shell being fixedly mounted to one end of the water inlet shell by a plurality of fixing bolts, a support tube being fixedly mounted inside the water inlet shell, a plurality of guide plates being fixedly connected in an annular array at one end of the support tube, and a spiral diverter plate being provided at the other end of the support tube, and the spiral diverter plate being spirally fixed to the outer wall of the support tube, a protective mechanism being fixedly mounted on one end of the water inlet shell, the fixing ring and the filter ring, one end of the fixing ring being fixedly mounted to one end of the water inlet shell, the outer edge of the filter ring being fixedly connected to one end of the fixing ring, one end of the filter ring being fixedly connected to a filter screen, and a plurality of grooves being opened in an annular array on the inner side of the other end of the filter ring, a spring being provided inside the groove, and a convex plate being slidably connected to the inner wall of the groove, and one end of the convex plate being fixedly connected to one end of the spring.

[0007] Preferably, two first mounting plates are symmetrically welded to the outer side of the filter ring, and two second mounting plates are symmetrically welded to the outer side of the fixing ring.

[0008] Preferably, a plurality of clamping blocks are fixedly connected to the annular array on the outer wall of the filter ring, and a plurality of clamping grooves are opened in the annular array on the inner wall of the fixing ring.

[0009] Preferably, one end of the clamping block is clamped with the inner side of the clamping slot, and a plurality of reinforcing ribs are welded in a circular array on the outer wall of the assembled shell.

[0010] Preferably, a plurality of reinforcing ribs 2 are welded in a circular array on the outer wall of the water inlet housing.

[0011] Preferably, an assembly ring is welded to one end of the assembly shell.

[0012] Compared with the prior art, the advantages and positive effects of the present invention are:

[0013] 1. In the utility model, multiple guide plates and spiral diverter plates are added inside the water inlet shell. The guide plates can effectively guide the water flow and reduce the turbulence caused by the impact of the water flow. The spiral diverter plates can further evenly divert the water flow and generate pre-vortex, so that the water flow can enter the pump body and cooperate with the impeller more smoothly. The water inlet mechanism is an upgraded and modified product based on the water inlet horn of the traditional submersible axial flow pump, with low investment cost. The guide plates and spiral diverter plates are added to the traditional water inlet horn, which can improve the fluid separation phenomenon and vortex and other adverse hydraulic phenomena at the outlet during the operation of the water pump impeller, reduce the risk of cavitation at the water inlet end of the water pump, reduce the problem of uneven force on the impeller, reduce the vibration amplitude and noise level of the pump body, and improve the operation stability and environmental friendliness of the pump.

[0014] 2. In the utility model, by adding a protective mechanism at one end of the water inlet mechanism, the filter can effectively prevent external impurities and sediment from entering the pump body, reducing the wear and clogging risks of internal components of the pump body, reducing maintenance costs and downtime, and extending the service life of the pump. At the same time, when the water flow continuously impacts multiple convex plates, the convex plates squeeze the springs, and the convex plates move back and forth along the grooves under the action of the spring force. Multiple convex plates continuously hit the filter screen, thereby automatically shaking off the impurities and sediment on the filter screen, making it easy to use and preventing impurities on the filter screen from affecting the fluid transported by the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model provides a three-dimensional structural diagram of a submersible axial flow pump inlet horn equipped with a forced pre-swirl guide plate;

[0016] Figure 2 The utility model proposes an exploded view of a submersible axial flow pump inlet horn equipped with a forced pre-swirl guide plate;

[0017] Figure 3 The utility model provides a top cross-sectional view of a submersible axial flow pump inlet horn equipped with a forced pre-swirl guide plate;

[0018] Figure 4 This utility model proposes a submersible axial flow pump water inlet horn equipped with a forced pre-swirl guide plate Figure 3 A magnified detail of point A in the middle.

[0019] Legend: 1. Water inlet mechanism; 2. Protection mechanism; 11. Assembly shell; 12. Assembly ring; 13. Reinforcement rib 1; 14. Water inlet shell; 15. Reinforcement rib 2; 16. Support pipe; 17. Guide plate; 18. Fixing bolt; 19. Spiral diverter plate; 21. Fixing ring; 22. Filter ring; 23. Filter screen; 24. Mounting plate 1; 25. Block; 26. Slot; 27. Mounting plate 2; 28. Groove; 29. ​​Spring; 210. Protruding plate. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1: Figure 1 - Figure 3As shown, the utility model provides a submersible axial flow pump water inlet horn equipped with a forced pre-swirl guide plate, comprising a water inlet mechanism 1, the water inlet mechanism 1 comprising an assembly shell 11, a water inlet shell 14 and a plurality of fixing bolts 18, the assembly shell 11 is fixedly installed with one end of the water inlet shell 14 by a plurality of fixing bolts 18, a support tube 16 is fixedly installed inside the water inlet shell 14, a plurality of guide plates 17 are fixedly connected to a ring array at one end of the support tube 16, and a spiral diverter plate 19 is provided at the other end of the support tube 16, and the spiral diverter plate 19 is spirally fixed to the outer wall of the support tube 16, a plurality of reinforcing ribs 13 are welded to the outer wall of the assembly shell 11 in a ring array, a plurality of reinforcing ribs 15 are welded to the outer wall of the water inlet shell 14 in a ring array, and an assembly ring 12 is welded to one end of the assembly shell 11.

[0023] The following is a detailed description of the specific settings and functions of this embodiment: The water inlet mechanism 1 is an upgraded and modified product based on the traditional submersible axial flow pump water inlet horn, with low investment cost. The guide plate 17 and the spiral diverter plate 19 are added to the traditional water inlet horn, which can improve the fluid separation phenomenon and vortex and other adverse hydraulic phenomena at the outlet during the operation of the pump impeller, reduce the cavitation risk at the water inlet end of the pump, improve the efficiency of the pump impeller, and improve the cavitation performance of the pump. At the same time, multiple guide plates 17 can make the incoming water flow tend to be stable, reduce the problem of uneven force on the impeller, reduce the vibration amplitude and noise level of the pump body, and improve the operation stability and environmental friendliness of the pump.

[0024] Example 2: Figure 1 - Figure 4 As shown, a protective mechanism 2, a fixing ring 21 and a filter ring 22 are fixedly installed at one end of the water inlet housing 14, one end of the fixing ring 21 is fixedly installed to one end of the water inlet housing 14, the outer edge of the filter ring 22 is fixedly connected to one end of the fixing ring 21, one end of the filter ring 22 is fixedly connected to a filter screen 23, and a plurality of grooves 28 are provided in an annular array on the inner side of the other end of the filter ring 22, a spring 29 is provided inside the groove 28, and a convex plate 210 is slidably connected to the inner wall of the groove 28, one end of the convex plate 210 is fixedly connected to one end of the spring 29, two mounting plates 24 are symmetrically welded to the outer side of the filter ring 22, and two mounting plates 27 are symmetrically welded to the outer side of the fixing ring 21, a plurality of clamping blocks 25 are fixedly connected to the outer wall annular array of the filter ring 22, a plurality of clamping grooves 26 are provided in the inner wall annular array of the fixing ring 21, and one end of the clamping block 25 is clamped to the inner side of the clamping groove 26.

[0025] The effect achieved by the entire embodiment is that by adding a protective mechanism 2 at one end of the water inlet mechanism 1, the filter ring 22 is connected to the slot 26 of the fixing ring 21 through multiple blocks 25, and then the mounting plate 1 24 and the mounting plate 2 27 are fixed by bolts. The filter screen 23 can effectively prevent external impurities and mud and sand from entering the pump body, reducing the wear and clogging risks of internal components of the pump body, reducing maintenance costs and downtime, and extending the service life of the pump. At the same time, when the water flow continuously impacts the multiple convex plates 210, the convex plates 210 squeeze the springs 29, and the convex plates 210 move back and forth along the grooves 28 under the elastic force of the springs 29, and the multiple convex plates 210 continuously hit the filter screen 23, thereby automatically shaking off the impurities and mud on the filter screen 23.

[0026] The use method and working principle of this device: the water inlet mechanism 1 is connected to the pump body through the assembly ring 12 at one end thereof, and the other end of the water inlet mechanism 1 is connected to the protective mechanism 2, by fixing the support tube 16 inside the water inlet shell 14, a plurality of guide plates 17 are fixed in a circular array at one end of the support tube 16, and a spiral spiral diverter plate 19 is provided at the other end of the support tube 16. The cross-sectional shape of the guide plate 17 is streamlined, which can effectively guide the water flow and reduce the turbulence caused by the impact of the water flow. The spiral diverter plates 19 are spirally distributed inside the water inlet shell 14, and the spiral diverter plates 19 can further evenly divert the water flow and generate pre-swirl, so that the water The flow can enter the pump body and cooperate with the impeller more smoothly; the water inlet mechanism 1 is an upgraded and modified product based on the water inlet horn of the traditional submersible axial flow pump, with low investment cost. The guide plate 17 and the spiral diverter plate 19 are added to the traditional water inlet horn, which can improve the flow separation phenomenon and vortex and other undesirable water flow phenomena at the outlet of the water pump impeller during operation, reduce the cavitation risk at the water inlet end of the water pump, improve the efficiency of the water pump impeller, and improve the cavitation performance of the water pump. At the same time, multiple guide plates 17 can make the incoming water flow tend to be stable, reduce the problem of uneven force on the impeller, reduce the vibration amplitude and noise level of the pump body, and improve the operation stability and environmental friendliness of the pump;

[0027] By adding a protective mechanism 2 at one end of the water inlet mechanism 1, the filter ring 22 is connected to the slot 26 of the fixing ring 21 through multiple blocks 25, and then the mounting plate 1 24 and the mounting plate 2 27 are fixed by bolts. The filter screen 23 can effectively prevent external impurities and sediment from entering the pump body, reducing the wear and clogging risks of internal components of the pump body, reducing maintenance costs and downtime, and extending the service life of the pump. At the same time, when the water flow continuously impacts the multiple convex plates 210, the convex plates 210 squeeze the springs 29, and the convex plates 210 move back and forth along the grooves 28 under the action of the elastic force of the springs 29. The multiple convex plates 210 continuously hit the filter screen 23, thereby automatically shaking off the impurities and sediment on the filter screen 23, making it convenient to use and preventing impurities on the filter screen 23 from affecting the fluid transported by the pump body.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A submersible axial flow pump water inlet horn equipped with a forced pre-swirl guide plate, comprising a water inlet mechanism (1), the water inlet mechanism (1) comprising an assembly housing (11), a water inlet housing (14) and a plurality of fixing bolts (18), the assembly housing (11) being fixedly mounted to one end of the water inlet housing (14) by the plurality of fixing bolts (18), characterized in that: A support tube (16) is fixedly installed inside the water inlet housing (14), and a plurality of guide plates (17) are fixedly connected to one end of the support tube (16) in a circular array, and a spiral diverter plate (19) is provided at the other end of the support tube (16), and the spiral diverter plate (19) is fixed to the outer wall of the support tube (16) in a spiral shape. A protective mechanism (2), a fixing ring (21) and a filter ring (22) are fixedly installed at one end of the water inlet housing (14), and one end of the fixing ring (21) is fixed to the water inlet. One end of the housing (14) is fixedly installed, the outer edge of the filter ring (22) is fixedly connected to one end of the fixing ring (21), one end of the filter ring (22) is fixedly connected to the filter screen (23), and the other end of the filter ring (22) is provided with a plurality of grooves (28) in an annular array inside, a spring (29) is provided inside the groove (28), and a convex plate (210) is slidably connected to the inner wall of the groove (28), and one end of the convex plate (210) is fixedly connected to one end of the spring (29).

2. The submersible axial flow pump inlet horn equipped with a forced pre-swirl guide plate according to claim 1, characterized in that: Two first mounting plates (24) are symmetrically welded to the outer side of the filter ring (22), and two second mounting plates (27) are symmetrically welded to the outer side of the fixing ring (21).

3. The submersible axial flow pump inlet horn equipped with a forced pre-swirl guide plate according to claim 1, characterized in that: The outer wall annular array of the filter ring (22) is fixedly connected with a plurality of clamping blocks (25), and the inner wall annular array of the fixing ring (21) is provided with a plurality of clamping grooves (26).

4. The submersible axial flow pump inlet horn equipped with a forced pre-swirl guide plate according to claim 3, characterized in that: One end of the clamping block (25) is clamped to the inner side of the clamping slot (26), and a plurality of reinforcing ribs (13) are welded in a circular array on the outer wall of the assembly shell (11).

5. The submersible axial flow pump inlet horn equipped with a forced pre-swirl guide plate according to claim 1, characterized in that: The outer wall of the water inlet housing (14) is welded with a plurality of reinforcing ribs (15) in an annular array.

6. The submersible axial flow pump inlet horn equipped with a forced pre-swirl guide plate according to claim 1, characterized in that: An assembly ring (12) is welded to one end of the assembly housing (11).

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