CN219911292U - Cavitation-preventing device for pump - Google Patents

Abstract

The utility model relates to the technical field of pumps and discloses a cavitation prevention device for a pump, which comprises a pump body, wherein a water inlet of the pump body is provided with a slow flow pipe, one side of the slow flow pipe, which is away from the pump body, is provided with a high-pressure port, the other side of the slow flow pipe is provided with a low-pressure port, a sealing ring is arranged between the low-pressure port and the pump body, and the outer wall of the slow flow pipe is provided with a plurality of heat dissipation fins.

Description

Cavitation-preventing device for pump

Technical Field

The utility model relates to the technical field of pumps, in particular to a cavitation prevention device for a pump.

Background

Pumps are machines that deliver or pressurize fluids. When the inlet pressure of the pump is smaller than the saturated vapor pressure of the liquid at the ambient temperature, a large amount of vapor in the liquid escapes and is mixed with the gas to form a plurality of small bubbles, the pressure rises when the liquid flows through the impeller, the bubbles are broken and condensed on the metal surfaces of the blades or the water outlet, liquid particles are quickly rushed to the centers of the bubbles, the metal surfaces are beaten by larger force, and the liquid particles are destroyed and vibrate.

At present, a pump body cavitation prevention structure in the market is generally provided with a cone thorn and a condenser pipe in a water inlet, so that bubbles flowing through the cone thorn are broken, the temperature is reduced, the saturated vapor pressure of fluid is improved, the generation of bubbles is reduced, but the manufacturing cost of the cone thorn is higher, and the energy consumption of the pump body is increased due to the arrangement of the condenser pipe.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide the cavitation prevention device for the pump, which has low energy consumption and simple structure.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a cavitation preventing device for pump, includes the pump body, the slow flow pipe is installed to the water inlet of pump body, the slow flow pipe deviates from the one side of pump body and is the high-pressure mouth, and the opposite side is the low pressure mouth, install the sealing washer between low pressure mouth and the pump body, be provided with a plurality of heat radiation fins on the outer wall of slow flow pipe.

The utility model is further provided with: the high-pressure port side in the slow flow pipe is fixedly provided with a first slow flow plate, and a plurality of first through holes are formed in the first slow flow plate.

The utility model is further provided with: a third slow flow plate is fixed on the side of the low pressure port in the slow flow pipe, and a plurality of third flow holes are formed in the third slow flow plate.

The utility model is further provided with: the first slow-flow plate and the third slow-flow plate are provided with second slow-flow plates at intervals, a plurality of second through holes are formed in the second slow-flow plates, and the apertures of the first through holes, the second through holes and the third through holes are sequentially increased.

The utility model is further provided with: the buffer chamber is arranged on one side of the low pressure port in the buffer pipe, the buffer chamber is in a convex disc shape, the maximum diameter of the disc is larger than that of the buffer pipe, and the buffer chamber is arranged between the third buffer plate and the sealing ring.

The utility model has the advantages that:

1. the pump body and the slow flow pipe are designed in a split mode, the structure is simple, the manufacturing is convenient, the high-pressure port of the slow flow pipe is connected with external fluid, the low-pressure port is connected with the pump body, three slow flow plates are respectively arranged from the high-pressure port to the low-pressure port in the slow flow pipe, a plurality of through holes are correspondingly formed in each slow flow plate, the through areas of the three slow flow plates are sequentially increased, the pressure and the flow rate of the fluid are slowly reduced when the fluid passes through the three slow flow plates, abrupt changes are prevented, the generation of bubbles is reduced, a buffer chamber is arranged between the third slow flow plate and the pump body, the volume of the buffer chamber is large, the effect of reducing speed and stabilizing flow is achieved, and the generation of bubbles entering the pump body is reduced;

2. the slow flow pipe is provided with a certain length, and the outer side of the pipe wall of the slow flow pipe is provided with a plurality of radiating fins, so that when fluid flows through the slow flow pipe, the fluid can fully radiate heat through the radiating fins without additional energy consumption, the temperature of the fluid is reduced, the saturated vapor pressure of the fluid is improved, the generation of bubbles is reduced, and the cavitation phenomenon is reduced.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic view of a slow flow pipe structure according to the present utility model;

FIG. 3 is a left side view of the view shown in FIG. 2;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

in the figure: 1. a pump body; 2. a buffer tube; 3. a high pressure port; 4. a low pressure port; 5. a first slow flow plate; 501. a first through-flow hole; 6. a second slow flow plate; 601. a second vent; 7. a third slow flow plate; 701. a third flow-through hole; 8. a heat radiation fin; 9. a buffer chamber; 10. and (3) sealing rings.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, the terms "upper" and "lower" are used generally with respect to the directions shown in the drawings, or with respect to the vertical, vertical or gravitational directions; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present utility model.

Referring to fig. 1-4, the present utility model provides the following technical solutions:

the cavitation preventing device for the pump comprises a pump body 1, wherein a slow flow pipe 2 is arranged at a water inlet of the pump body 1, a high-pressure port 3 is arranged at one side of the slow flow pipe 2, which is away from the pump body 1, a low-pressure port 4 is arranged at one side, which is connected with the pump body 1, a sealing ring 10 is arranged between the low-pressure port 4 and the water inlet of the pump body, and a plurality of radiating fins 8 are fixed on the outer wall of the slow flow pipe 2; the slow flow pipe 2 and the pump body 1 are designed in a split mode, and are convenient to install and convenient to manufacture and replace; the flow retarding pipe 2 is provided with a certain length, and when fluid flows through the flow retarding pipe 2, the heat can be fully dissipated through the heat dissipating fins 8, so that the temperature of the fluid is reduced, the saturated vapor pressure is improved, the generation of bubbles is reduced, and the cavitation phenomenon is reduced.

A first slow flow plate 5, a second slow flow plate 6 and a third slow flow plate 7 are sequentially fixed in the slow flow pipe 2 from the high pressure port 3 to the low pressure port 4 at intervals, a plurality of first through holes 501 are formed in the first slow flow plate 5, a plurality of second through holes 601 are formed in the second slow flow plate 6, a plurality of third diversion holes 701 are formed in the third slow flow plate 7, the diameters of the first through holes 501, the second through holes 601 and the third through holes 701 are sequentially increased, a buffer chamber 9 is arranged in the slow flow pipe 2, the buffer chamber 9 is arranged between the third slow flow plate 7 and a sealing ring 10, the buffer chamber 9 is in a convex disc shape, and the maximum diameter of the disc is larger than the maximum diameter of the slow flow pipe 2; the flow areas of the first slow flow plate 5, the second slow flow plate 6 and the third slow flow plate 7 are sequentially increased, and the pressure and the flow speed are slowly reduced when the fluid flows through the three slow flow plates, so that a large number of bubbles are prevented from being generated due to abrupt change of the state of the fluid; meanwhile, a buffer chamber 9 is arranged between the third slow flow plate 7 and the water inlet of the pump body 1, the volume of the buffer chamber 9 is large, fluid flows in the pump body 1 after flowing through the buffer chamber 9 stably, and the cavitation phenomenon is reduced after the fluid is slowed down again.

Specifically, the pump body 1 and the slow flow pipe 2 are designed in a split mode, the structure is simple, the manufacturing is convenient, the high pressure port 3 of the slow flow pipe 2 is connected with external fluid, the low pressure port 4 is connected with the pump body 1, a first slow flow plate 5, a second slow flow plate 6 and a third slow flow plate 7 are respectively arranged from the high pressure port 3 to the low pressure port 4 in the slow flow pipe 2, a plurality of through holes are correspondingly formed in each slow flow plate, the through areas of the first through holes 501, the second through holes 601 and the third through holes 701 are sequentially increased, the pressure and the flow speed of the fluid are slowly reduced when the fluid passes through the three slow flow plates, sudden changes are prevented, bubbles are reduced, a buffer chamber 9 is arranged between the third slow flow plate 7 and the pump body 1, the volume of the buffer chamber 9 is large, the effect of reducing speed and stabilizing flow is achieved, and the bubbles entering the pump body 1 are reduced;

the slow flow pipe 2 is provided with a certain length, the outer side of the pipe wall of the slow flow pipe 2 is provided with a plurality of radiating fins 8, when fluid flows through the slow flow pipe 2, the fluid can fully radiate heat through the radiating fins 8 without additional energy consumption, the temperature of the fluid is reduced, the saturated vapor pressure of the fluid is improved, the generation of bubbles is reduced, and the cavitation phenomenon is reduced.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (2)

1. The cavitation prevention device for the pump comprises a pump body (1), and is characterized in that: the water inlet of pump body (1) is installed and is slowly flowed pipe (2), one side that slowly flows pipe (2) deviates from pump body (1) is high pressure port (3), and the opposite side is low pressure port (4), install sealing washer (10) between low pressure port (4) and pump body (1), be provided with a plurality of radiator fins (8) on the outer wall of slowly flowing pipe (2), high pressure port (3) side in slowly flowing pipe (2) is fixed with first slow flowing plate (5), a plurality of first through-flow holes (501) have been seted up on first slow flowing plate (5), low pressure port (4) side in slowly flowing pipe (2) is fixed with third slow flowing plate (7), a plurality of third through-flow holes (701) have been seted up on third slow flowing plate (7), the interval is provided with second slow flowing plate (6) between first slow flowing plate (5) and third slow flowing plate (7), set up second through-flow hole (601) on second slow flowing plate (6), second through-flow hole (501) and third through-flow hole (601) increase in proper order.

2. A cavitation prevention device for a pump according to claim 1, wherein: the buffer chamber (9) is arranged on one side of the low-pressure port (4) in the slow flow pipe (2), the buffer chamber (9) is in a protruding disc shape, the maximum diameter of the disc is larger than that of the slow flow pipe (2), and the buffer chamber (9) is arranged between the third slow flow plate (7) and the sealing ring (10).