Gas-liquid mixer based on central gas inlet of Venturi tube

Abstract

The utility model relates to a gas-liquid mixer based on venturi tube center air inflow, which comprises a venturi tube fitting, an interlayer piece and a guide tube combination piece, the interlayer piece is connected with one end of the venturi tube fitting, the interlayer piece is provided with an elastic body-shaped tube cavity extending into a contraction section of the venturi tube fitting, and the guide tube combination piece is connected with the venturi tube fitting. A water inlet throat pipe hole is formed in the end, located in the contraction section, of the elastic-body-shaped pipe cavity, the guide pipe combination piece is connected with the interlayer piece, and a center pipe connected with the other end of the elastic-body-shaped pipe cavity is arranged in the guide pipe combination piece. The gas-liquid mixer is favorable for improving the core flow area of the Venturi tube.

Description

Technical Field

[0001] The utility model relates to a gas-liquid mixer based on the central air intake of a venturi tube. Background Art

[0002] A bubble generator generally refers to a device that can generate bubbles, while a microbubble generator refers to a bubble generator that can generate microbubbles; generally, bubbles with a diameter less than 50 microns are called microbubbles. There are many principles and methods for generating microbubbles, such as dissolved air-release method, microporous aeration method, air entrainment-dispersion method, ultrasound / sound pressure method, and electrolysis method, so the structural forms of microbubble generators are also different; among them, there is a Venturi-type bubble generator in the air entrainment-dispersion method that is improved based on the Venturi tube structure.

[0003] The Venturi bubble generator is a device that uses the Venturi principle to form a negative pressure area in a liquid pipeline through a contraction part, and sucks in the surrounding gas to form bubbles. It is used in many fields, such as water flotation, sewage treatment, agricultural soil disinfection, nutrient solution oxygenation, fire prevention and other engineering fields. The microbubbles generated by the bubble generator can be used to control algae blooms in the field of gas flotation. Improving the structural parameters of the Venturi bubble generator can improve the performance of the bubble generator, thereby reducing the diameter of the generated bubbles and increasing the number of bubbles, thereby further improving the ability to control algae blooms.

[0004] Therefore, it is very necessary to improve the structural research of bubble generators in order to improve the working efficiency of bubble generators in various fields. Venturi bubble generator is a commonly used type, and its structure determines the performance. According to existing research, the position of the gas injection port and the diffusion angle of the structure will affect its performance, but the influence of different air inlet positions and structural shapes on macro performance has not been studied much. At the same time, the good performance of the aircraft engine model in a similar straight cylinder is referred to. Therefore, an improvement device and an auxiliary device for improving the core flow area of ​​the Venturi tube are designed. Utility Model Content

[0005] The utility model aims to provide a gas-liquid mixer based on the central air intake of a venturi tube, which helps to improve the core flow area of ​​the venturi tube.

[0006] The technical solution of the utility model is: a gas-liquid mixer based on the central air intake of a venturi tube, comprising a venturi tube, a sandwich component and a catheter combination component, wherein the sandwich component is connected to one end of the venturi tube component, and the sandwich component is provided with an elastic tube cavity extending into the contraction section of the venturi tube component, and the end of the elastic tube cavity located in the contraction section is provided with a water inlet pipe hole, the catheter combination component is connected to the sandwich component, and a central tube connected to the other end of the elastic tube cavity is provided in the catheter combination component.

[0007] Furthermore, the venturi tube is provided with a water inlet cavity, a contraction section, a throat section, an expansion section and a water outlet section connected in sequence from one end to the other end.

[0008] Furthermore, a Venturi flange is provided at one end of the Venturi tube, and an annular flange is provided at the sandwich component; the outer wall of the other end of the elastic tube cavity is connected to the annular flange through ribs arranged at intervals along the circumferential direction; and a catheter flange is provided at one end of the catheter assembly.

[0009] Furthermore, a matching positioning structure is provided between the Venturi flange, the annular flange and the duct flange.

[0010] Furthermore, the positioning structure includes positioning columns which are arranged at intervals along the circumferential direction on the end face of the Venturi flange and protrude axially, the annular flange is provided with a first positioning sleeve for the positioning columns to extend into along the circumferential direction, and the catheter flange is provided with a second positioning sleeve for the first positioning sleeve to extend into along the circumferential direction.

[0011] Furthermore, a first sealing structure is provided between the Venturi flange and the annular flange.

[0012] Furthermore, the first sealing structure includes a first annular sealing groove arranged on the end surface of the Venturi flange, and a first annular sealing plate protruding outward is arranged on the end surface of the annular flange facing the Venturi flange, and the first annular sealing groove is connected to the first annular sealing plate.

[0013] Furthermore, a second sealing structure is provided between the sandwich component and the catheter coupling component.

[0014] Furthermore, the second sealing structure includes a second annular sealing groove arranged at the end of the central tube, the other end of the elastic tube cavity is provided with a second annular sealing plate matching the second annular sealing groove, and the end surface of the catheter flange is provided with a third annular sealing groove.

[0015] Furthermore, the Venturi flange, the annular flange and the conduit flange are all provided with a plurality of corresponding bolt holes spaced apart along the circumferential direction.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. The structure is simple and easy to use, with low installation requirements. At the same time, it does not damage the original Venturi tube structure to transform or recycle it, saving resources.

[0018] 2. It improves the problems of low turbulence intensity, low turbulence dissipation rate and late bubble breaking time of the central fluid of the ordinary Venturi tube under the same bubbles and the same flow rate. At the same time, the maximum pressure generated is relatively lower, and the requirements for structural strength are lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the gas-liquid mixer assembly of the utility model;

[0020] Figure 2 This is an exploded view of the gas-liquid mixer assembly of the utility model;

[0021] Figure 3 It is a cross-sectional view of the gas-liquid mixer of the utility model;

[0022] Figure 4 It is a cross-sectional view of the Venturi tube of the utility model;

[0023] Figure 5 This is a schematic diagram of the sandwich structure of the utility model;

[0024] Figure 6 It is a cross-sectional view of the sandwich component of the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the catheter combination of the utility model;

[0026] Figure 8 It is a cross-sectional view of the catheter combination of the utility model;

[0027] In the figure: 1-Venturi pipe fitting 101-water inlet pipe cavity 102-contraction section 103-throat section 104-expansion section 105-water outlet pipe section 110-Venturi flange 111-positioning column 112-first annular sealing groove 113-bolt hole 2-sandwich member 201-rib 210-elastic tube cavity 211-water inlet throat hole 220-annular flange 221-first positioning sleeve 222-second annular sealing plate 223-bolt hole 224-first annular sealing plate 3-conduit assembly 310-central pipe 311-bend pipe section 312-second annular sealing groove 313-rib 320-outer pipe 330-conduit flange 331-second positioning sleeve 332-third annular sealing groove 333-bolt hole. DETAILED DESCRIPTION

[0028] In order to make the above features and advantages of the present invention more understandable, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0029] refer to Figures 1 to 8

[0030] A gas-liquid mixer based on central air intake of a venturi tube comprises a venturi tube 1, an interlayer component 2 and a catheter assembly 3, wherein the interlayer component is connected to one end of the venturi tube, and the interlayer component is provided with an elastomeric tube cavity 210 extending into the contraction section of the venturi tube, and the elastomeric tube cavity is used to transport other or other mixed items; the end of the elastomeric tube cavity located in the contraction section is provided with a water inlet pipe hole 211, the catheter assembly is connected to the interlayer component, and a central tube 310 connected to the other end of the elastomeric tube cavity is provided in the catheter assembly.

[0031] In this embodiment, the venturi tube is provided with a water inlet cavity 101, a contraction section 102, a throat section 103, an expansion section 104 and a water outlet section 105 in sequence from one end to the other. The water inlet throat hole faces the throat section.

[0032] In this embodiment, the water inlet pipe cavity and the contraction section are chamfered according to relevant design parameters; the contraction section and the throat section are chamfered according to relevant design parameters; the throat section and the expansion section are chamfered according to relevant design parameters; the expansion section and the water outlet pipe section are also chamfered according to relevant design parameters. The chamfered design is to prevent a large loss of kinetic energy due to the change of fluid direction, resulting in poor results.

[0033] When the Venturi fitting is combined with the sandwich fitting, a small Venturi-type cavity is formed in the contraction section of the Venturi fitting and the water inlet cavity section, and the first fluid acceleration is performed; when the fluid passes through the second half of the small Venturi cavity, the cavity expands rapidly and the cross-sectional area is larger than the cross-sectional area of ​​the Venturi fitting throat, which causes a second acceleration.

[0034] In this embodiment, a Venturi flange 110 is provided at one end of the Venturi tube, and an annular flange 220 is provided at the sandwich member; the outer wall of the other end of the elastic tube cavity is connected to the annular flange by ribs 201 arranged at intervals along the circumferential direction, and ribs are added to the rear part of the elastic tube cavity to achieve a reinforcement effect in order to prevent the fluid from flowing too fast. A catheter flange 330 is provided at one end of the catheter assembly.

[0035] In this embodiment, the rib plate 201 is inclined from the flange to the elastic tube cavity. Considering the influence on the fluid, the rib plate 201 is set to be wider and thicker at the connection with the flange and thinner and narrower at the connection with the elastic tube cavity. The rib plate 201 is designed with four ribs with rounded corners, forming a wide and thick middle and narrow and thin sides.

[0036] In this embodiment, the projectile-shaped tube cavity is set to be similar to the shape of an aircraft engine, with a small angle of slow rise and a large angle of rapid descent. The total length of the projectile should be located in the inlet area of ​​the throat section of the Venturi tube. The apex of the rise should be located at the same Venturi tube contraction section and the water inlet cavity as much as possible, forming a small throat indentation. The rapid descent causes the expansion section of the small Venturi tube to be formed in the front of the throat section of the Venturi tube, forming two speed increases. The influence of pressure resistance on the top position should be considered, and the rounded corners should be processed according to the relevant design parameters. The shape of the projectile and the state of forming the small Venturi tube are the key parts of this design.

[0037] In this embodiment, the water inlet end of the central tube is connected to the outer tube via ribs 313 arranged at intervals along the circumferential direction. The above-mentioned ribs have the same shape as the ribs 201, and the central tube is fixed at the center position to ensure that the central tube cavity is located at the center position; the central tube has a curved tube section 311 passing through its outer tube 320, and the curved tube section is inclined or led out of the outer tube at a right angle of 90 degrees.

[0038] In this embodiment, a matching positioning structure is provided between the Venturi flange, the annular flange, and the duct flange. Specifically, the positioning structure includes three positioning posts 111 which are arranged at intervals along the circumferential direction on the end surface of the Venturi flange and protrude along the axial direction; the annular flange is provided with a first positioning sleeve 221 or a first positioning cavity for the positioning posts to extend into along the circumferential direction, and the duct flange is provided with a second positioning sleeve 331 or a second positioning cavity for the first positioning sleeve to extend into along the circumferential direction.

[0039] In this embodiment, a first sealing structure is provided between the Venturi flange and the annular flange. Specifically, the first sealing structure includes a first annular sealing groove 112 provided on the end surface of the Venturi flange, and a first annular sealing plate 224 protruding outward is provided on the end surface of the annular flange facing the Venturi flange, and the first annular sealing groove is connected to the first annular sealing plate. A sealing ring can be provided in the first annular sealing groove to improve the sealing effect.

[0040] In this embodiment, a second sealing structure is provided between the sandwich component and the catheter combination component. Specifically, the second sealing structure includes a second annular sealing groove 312 provided at the end of the central tube, a second annular sealing plate 222 matching the second annular sealing groove is provided at the other end of the elastic tube cavity, and a third annular sealing groove 332 is provided on the end surface of the catheter flange. Sealing rings can be provided in the second annular sealing groove and the third annular sealing groove to improve the sealing effect.

[0041] In this embodiment, the Venturi flange has the same size as the annular flange and the catheter flange, and is provided with a plurality of corresponding bolt holes 113, bolt holes 223, and bolt holes 333 at intervals along the circumferential direction, so that the Venturi tube, the tube clamp, and the catheter assembly can be firmly connected and sealed by bolts.

[0042] The duct combination, sandwich, and Venturi fittings are connected and sealed in sequence; at the junction of the water inlet cavity and the contraction section of the Venturi fitting, the apex of the rise is located as much as possible at the same Venturi tube contraction section and the outer tube connection section, forming a small throat indentation, and the rapid descent causes the expansion section of a small Venturi tube to be formed in front of the throat section of the Venturi fitting; the throat section of the Venturi fitting is then used for the second speed increase. By changing the sandwich to control the amount of fluid entering, the two fluids are included in the same tube. The duct combination can be upgraded later to control the flow regulation of the central pipeline and the outer pipeline, and convert the internal and external fluids. At the same time, the sandwich can be replaced by itself to change the combination efficiency.

[0043] If the words "first", "second" and the like are used in the above-mentioned text of the utility model to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above-mentioned words have no special meaning.

[0044] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the fixed connection to each other can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except where it is obviously impossible to use an one-piece molding process).

[0045] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0046] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated molding process.

[0047] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A gas-liquid mixer based on the central air intake of a venturi tube, comprising a venturi tube, a sandwich component and a conduit combination component, characterized in that: The sandwich component is connected to one end of the venturi tube, and the sandwich component is provided with an elastic tube cavity extending into the contraction section of the venturi tube, and the end of the elastic tube cavity located in the contraction section is provided with a water inlet pipe hole, and the catheter combination is connected to the sandwich component, and a central tube connected to the other end of the elastic tube cavity is provided in the catheter combination.

2. A gas-liquid mixer based on venturi tube central air intake according to claim 1, characterized in that: The venturi pipe piece is provided with a water inlet cavity, a contraction section, a throat section, an expansion section and a water outlet section connected in sequence from one end to the other end.

3. The gas-liquid mixer based on the central air intake of the venturi tube according to claim 1, characterized in that: One end of the Venturi tube is provided with a Venturi flange, and the sandwich component is provided with an annular flange; the outer wall of the other end of the elastic tube cavity is connected to the annular flange through ribs arranged at intervals along the circumferential direction; one end of the catheter assembly is provided with a catheter flange.

4. A gas-liquid mixer based on venturi tube central air intake according to claim 3, characterized in that: A matching positioning structure is arranged between the Venturi flange, the annular flange and the conduit flange.

5. The gas-liquid mixer based on the central air intake of the venturi tube according to claim 4, characterized in that: The positioning structure includes positioning columns which are arranged at intervals along the circumferential direction on the end face of the Venturi flange and protrude axially. The annular flange is provided with a first positioning sleeve for the positioning columns to extend into along the circumferential direction. The catheter flange is provided with a second positioning sleeve for the first positioning sleeve to extend into along the circumferential direction.

6. A gas-liquid mixer based on venturi tube central air intake according to claim 3, 4 or 5, characterized in that: A first sealing structure is arranged between the Venturi flange and the annular flange.

7. A gas-liquid mixer based on central air intake of a venturi tube according to claim 6, characterized in that: The first sealing structure includes a first annular sealing groove arranged on the end surface of the Venturi flange, and a first annular sealing plate protruding outward is arranged on the end surface of the annular flange facing the Venturi flange, and the first annular sealing groove is connected to the first annular sealing plate.

8. A gas-liquid mixer based on central air intake of a venturi tube according to claim 3, 4, 5 or 7, characterized in that: A second sealing structure is arranged between the sandwich component and the catheter coupling component.

9. The gas-liquid mixer based on the central air intake of the Venturi tube according to claim 8, characterized in that: The second sealing structure includes a second annular sealing groove arranged at the end of the central tube, a second annular sealing plate matching the second annular sealing groove is arranged at the other end of the elastic tube cavity, and a third annular sealing groove is arranged on the end surface of the catheter flange.

10. The gas-liquid mixer based on the central air intake of the venturi tube according to claim 3, characterized in that: The Venturi flange, the annular flange and the conduit flange are all provided with a plurality of corresponding bolt holes spaced apart along the circumferential direction.

Images