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CN-122006924-A - Venturi nozzle

CN122006924ACN 122006924 ACN122006924 ACN 122006924ACN-122006924-A

Abstract

The invention discloses a venturi nozzle, which comprises an outer shell, an inner shell arranged in the outer shell and an inner core connected in the inner shell, wherein a fluid channel is formed in the inner shell, the fluid channel comprises a first channel, a throat part and a second channel which are sequentially arranged and communicated, the cross section of the first channel is in a tapered shape, the inner diameter of the throat part is not larger than the inner diameter of the first channel adjacent to one end of the second end, the cross section of the second channel is in a gradually expanding shape from the throat part to the second end, the inner core comprises a top end part and a mandrel part, the top end part is provided with a fluid inlet allowing fluid to pass through, the inner shell is provided with a first air inlet channel, and the inner core is provided with a second air inlet channel communicated with the throat part.

Inventors

  • GUO CHUANG
  • LI MING
  • HUANG ZHENYU

Assignees

  • 基则曼(苏州)科技有限公司

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. A venturi nozzle, comprising: The inner shell is arranged in the outer shell, the first end and the second end of the inner shell extend out of the two ends of the outer shell respectively, a fluid channel for fluid to pass through is formed in the inner shell along the axis direction of the inner shell, and the fluid channel comprises a first channel, a throat part and a second channel which are sequentially arranged and communicated; The cross section of the first channel is in a tapered shape along the extending direction of the inner shell from the first end to the second end, the inner diameter of the throat part is not larger than the inner diameter of the first channel adjacent to the end of the second end, and the cross section of the second channel is in a gradually expanding shape from the throat part to the second end; a core including a tip portion sealingly mounted to a first end of the inner housing and a mandrel portion extending into the fluid passageway and into the second passageway, the tip portion having a fluid inlet for allowing fluid to pass therethrough along a central axis of the core; The inner shell is provided with at least one first air inlet channel communicated with the throat part, the first air inlet channel is communicated with the throat part in the circumferential direction, and the inner core is provided with a second air inlet channel communicated with the throat part.
  2. 2. The venturi nozzle of claim 1, wherein the outer surface of the spindle portion is provided with a helical vane positioned at least in the region of the throat portion such that fluid flowing through the throat portion is capable of undergoing helical rotation by the helical vane.
  3. 3. The venturi nozzle of claim 2, wherein when said inner core is connected inside said inner housing, two ends of said spiral vane extend into said first and second passages, respectively.
  4. 4. The venturi nozzle of claim 1, wherein the surface of the mandrel portion is continuous and smooth.
  5. 5. The venturi nozzle of claim 1, wherein the inlet of the second air inlet channel is arranged at the top end part along the direction vertical to the central axis of the inner core, the outlet of the second air inlet channel is arranged at the core shaft part along the direction vertical to the central axis of the inner core, the inner core is internally provided with passages communicated with the inlet and the outlet, and the outlets are uniformly distributed by taking the central axis of the inner core as the center.
  6. 6. The venturi nozzle of claim 1, wherein said spindle portion is of inverted cone configuration at an end remote from said tip portion.
  7. 7. The venturi nozzle of claim 1, wherein said first inlet passageway has two and is aligned along a direction of extension of said throat centerline axis.
  8. 8. The venturi nozzle of claim 1, wherein the inner housing comprises an inlet section, a constriction section, a throat section and a diffusion section which are sequentially arranged, the first channel is formed in the inlet section and the constriction section, the throat section is formed in the throat section, the second channel is formed in the diffusion section, the inlet section is in sealing connection with one end of the outer housing, the diffusion section is in sealing connection with the other end of the outer housing, and the constriction section and the throat section are arranged in the outer housing and are tightly abutted and fixed by the inlet section and the diffusion section.
  9. 9. The venturi nozzle of claim 8, wherein: a first annular groove communicated with the first air inlet channel is formed in the periphery of the throat section, and a second annular groove communicated with the second air inlet channel is formed in the periphery of the top end part of the inner core; the outer shell is provided with a first air port, the inlet section of the inner shell is provided with a second air port, the first air port is communicated with the first annular groove, and the second air port is communicated with the second annular groove.
  10. 10. The venturi nozzle of claim 8, wherein the junction of the inlet section, the convergent section, the throat section, the divergent section and the outer housing is provided with a seal.

Description

Venturi nozzle Technical Field The invention relates to the field of nozzles, in particular to a venturi nozzle. Background The venturi nozzle is used as a fluid device based on venturi effect, and is widely applied to atomization, mixing and mass transfer processes in the fields of chemical industry, environmental protection and energy, and the core principle is that negative pressure is generated by accelerating fluid through a throat contraction section, and external gas is passively introduced to realize gas-liquid two-phase mixing. However, most of the conventional venturi nozzles are single air inlet channels, which results in limited gas introduction and low mixing uniformity and efficiency, and meanwhile, the lack of internal guiding structures makes the residence time of the fluid in the throat area short, insufficient shearing of bubbles, and poor atomization effect. Disclosure of Invention To overcome the above drawbacks, an object of the present invention is to provide a venturi nozzle. In order to achieve the above purpose, the technical scheme adopted by the invention comprises the following steps: The inner shell is arranged in the outer shell, the first end and the second end of the inner shell extend out of the two ends of the outer shell respectively, a fluid channel for fluid to pass through is formed in the inner shell along the axis direction of the inner shell, and the fluid channel comprises a first channel, a throat part and a second channel which are sequentially arranged and communicated; The cross section of the first channel is in a tapered shape along the extending direction of the inner shell from the first end to the second end, the inner diameter of the throat part is not larger than the inner diameter of the first channel adjacent to the end of the second end, and the cross section of the second channel is in a gradually expanding shape from the throat part to the second end; a core including a tip portion sealingly mounted to a first end of the inner housing and a mandrel portion extending into the fluid passageway and into the second passageway, the tip portion having a fluid inlet for allowing fluid to pass therethrough along a central axis of the core; The inner shell is provided with at least one first air inlet channel communicated with the throat part, the first air inlet channel is communicated with the throat part in the circumferential direction, and the inner core is provided with a second air inlet channel communicated with the throat part. In a preferred embodiment of the venturi nozzle, the outer surface of the mandrel portion is provided with a spiral vane, and the spiral vane is located at least in the area where the throat is located, so that the fluid flowing through the throat can rotate helically under the action of the spiral vane. In the preferred technical solution of the venturi nozzle, when the inner core is connected inside the inner casing, two ends of the spiral vane extend into the first channel and the second channel respectively. In a preferred embodiment of the venturi nozzle described above, the surface of the mandrel portion is continuous and smooth. In the preferred technical scheme of the venturi nozzle, the inlet of the second air inlet channel is arranged at the top end part along the direction perpendicular to the central axis of the inner core, the outlet of the second air inlet channel is arranged at the core shaft part along the direction perpendicular to the central axis of the inner core, the inner core is internally provided with a passage communicated with the inlet and the outlet, and the outlets are provided with a plurality of passages and are uniformly distributed by taking the central axis of the inner core as the center. In a preferred embodiment of the venturi nozzle described above, the mandrel portion has an inverted conical configuration at an end remote from the tip portion. In the preferred technical solution of the venturi nozzle, the first air inlet channels have two and are respectively arranged along the extending direction of the central axis of the throat. In the preferred technical scheme of the venturi nozzle, the inner shell comprises an inlet section, a contraction section, a throat section and a diffusion section which are sequentially arranged, the first channel is formed in the inlet section and the contraction section, the throat section is formed in the throat section, the second channel is formed in the diffusion section, the inlet section is in sealing connection with one end of the outer shell, the diffusion section is in sealing connection with the other end of the outer shell, and the contraction section and the throat section are arranged in the outer shell and are tightly propped and fixed by the inlet section and the diffusion section. In the preferable technical scheme of the venturi nozzle, a first annular groove communicated with the first air inlet channel is circumferentially formed in the