Dissolved air releaser

Abstract

The utility model relates to the technical field of air flotation machine accessories, in particular to a dissolved air releaser which comprises an outer pipe and an inner pipe, the outer pipe at least comprises a releasing section and a containing section, a through groove is formed in the surface of the releasing section in the axial direction, and a plurality of releasing holes are formed in the surface of the inner pipe at intervals in the axial direction. The inner pipe can move in the outer pipe in the axial direction so as to change the length occupied by the inner pipe in the release section and the containing section and change the number of the release holes communicating with the through groove. According to the utility model, the inner pipe capable of moving axially is arranged, and the number of the release holes for releasing the bubbles is adjusted to change the release amount of the bubbles, so that the released bubbles are kept consistent in relative characteristics under high pressure and low pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of air flotation machine accessories, in particular to a dissolved air releaser. Background Art

[0002] The dissolved air releaser is one of the core components used in the flotation purification technology of polluted water bodies. Its main principle is to release the gas (such as air) dissolved in water in the form of tiny bubbles. The tiny bubbles will attach to the flocculated pollutants, promote the flotation removal of suspended matter, and improve water quality.

[0003] The dissolved air releaser needs to be connected to the dissolved air tank to release bubbles. The dissolved air tank has supersaturated gas. During the process of continuously releasing the dissolved air or inflating, the fluid pressure in the dissolved air tank is in dynamic change, which makes the dissolved air pressure introduced by the dissolved air releaser constantly change. The number of release ports of the traditional dissolved air releaser is constant and the dissolved air pressure cannot be adjusted by feedback, which makes the release pressure at the release port constantly change, resulting in the bubble characteristics (including bubble size, initial velocity of bubble release, bubble stability, etc.) not stable enough, so that the flotation effect cannot be maintained in the best state. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] The utility model aims to provide a dissolved air releaser which can automatically change the number of bubble release holes according to the supply pressure so that the released bubbles can maintain the same relative characteristics under high and low pressures.

[0006] 2. Technical Solution

[0007] The utility model is realized by the following technical solutions:

[0008] The utility model provides a dissolved gas releaser, comprising an outer tube and an inner tube, wherein the outer tube at least comprises a release section and a receiving section, a through groove is provided on the surface of the release section along its axial direction, a plurality of release holes are provided on the surface of the inner tube along its axial direction at intervals, and the inner tube can move axially in the outer tube to change the lengths occupied by the inner tube in the release section and the receiving section respectively, and change the number of the release holes connected to the through groove.

[0009] Furthermore, the release section is a triangular prism-shaped hollow pipe, and through grooves are provided on the three side walls of the release section. The outer wall of the inner tube is a triangular prism that fits tightly with the inner wall of the release section, and the three side walls of the inner tube are respectively axially provided with release holes that can be connected with the through grooves.

[0010] Furthermore, the accommodating section is in the shape of a hollow circular tube, one end of the inner tube extends into the accommodating section and is connected to a piston, the piston is slidably connected to the accommodating section, the other end face of the piston is connected to a hose, a through hole connecting the inner tube and the hose is provided between the two end faces of the piston, the free end of the accommodating section is connected to a guide tube connected to the hose, the side of the accommodating section is connected to a shunt balance tube, and the guide tube and the shunt balance tube are both connected to a pipeline for introducing dissolved gas.

[0011] Furthermore, a sliding hole is provided at the free end of the release section and is airtightly slidably connected to the inner tube axially. The end of the inner tube passes through the sliding hole to the outside of the outer tube and is fixedly connected to a fixing plate. A guide hole is provided on the fixing plate. A guide rod is fixedly connected to the end surface of the release section. The guide rod is slidably connected to the guide hole. A spring is sleeved on the outside of the guide rod, and both ends of the spring are respectively fixedly connected to the fixing plate and the end surface of the release section.

[0012] Furthermore, the outer end of the flow splitting and balancing pipe is connected to a pressure regulating valve.

[0013] Furthermore, the hose is a corrugated tube capable of axial expansion and contraction.

[0014] 3. Beneficial Effects

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model provides an inner tube that can move axially to adjust the number of release holes for releasing bubbles to change the amount of bubbles released. When the supply pressure increases, the inner tube moves into the release section, more bubble release ports are opened, more tiny bubbles can be released per unit time, the gas flow rate is dispersed, and excessively large bubbles are avoided, thereby ensuring that the size of each bubble is relatively consistent, and a good gas-liquid contact effect can be maintained under high pressure, and the released bubbles can be released stably; when the supply pressure decreases, the inner tube moves into the accommodating section, and some release ports are automatically closed, which can concentrate the gas flow rate and also help maintain the consistency of bubble size, avoiding the decrease in treatment efficiency caused by excessively large or too small bubbles; and when the pressure changes, the number of bubble release ports is automatically adjusted, which can ensure that the bubble density in the water body can be maintained within an ideal range regardless of high or low pressure conditions, avoiding local treatment effect differences caused by uneven bubble density. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is an exploded view of the utility model;

[0019] Figure 3It is the middle cross-sectional view of the inner tube and the hose fitting together;

[0020] 1. Outer tube; 101. Release section; 1011. Through groove; 1012. Sliding hole; 102. Accommodating section; 103. Guide rod; 104. Spring; 2. Inner tube; 201. Release hole; 3. Piston; 301. Through hole; 4. Hose; 5. Guide tube; 6. Diversion balance tube; 7. Pressure regulating valve; 8. Fixed plate; 801. Guide hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] A dissolved gas release device, see Figure 1-3 , comprising an outer tube 1 and an inner tube 2, the outer tube 1 comprising a release section 101 and a receiving section 102, wherein a through groove 1011 is provided on the surface of the release section 101 along its axial direction, and a plurality of release holes 201 are provided on the surface of the inner tube 2 along its axial direction at intervals; the inner tube 2 can move axially in the outer tube 1, and when the inner tube 2 moves, the lengths occupied by the inner tube 2 in the release section 101 and the receiving section 102 respectively change, and at the same time, the number of the release holes 201 that move to the rear side of the through groove 1011 and communicate with the through groove 1011 changes continuously;

[0023] The inner tube 2 moves axially to adjust the number of the release holes 201 for releasing bubbles to change the amount of bubbles released. When the supply pressure increases, the inner tube 2 moves into the release section 101, and more bubble release ports are opened. More tiny bubbles can be released per unit time, which increases the gas-liquid contact area and accelerates the gas mass transfer process. When the supply pressure decreases, the inner tube 2 moves into the accommodation section 102, automatically closing some release ports, reducing unnecessary gas waste, and maintaining the bubble characteristics of the remaining release ports, including the consistency of bubble size, the bubble release speed of a single release port, and the uniformity of bubble density.

[0024] The release section 101 is a triangular prism-shaped hollow pipe, and through grooves 1011 are provided on the three side walls of the release section 101. The outer wall of the inner tube 2 is a triangular prism-shaped tube that fits tightly with the inner wall of the release section 101. The three side walls of the inner tube 2 are respectively provided with release holes 201 that can communicate with the through grooves 1011 along the axial direction. When the inner tube 2 moves, bubbles are released from the through grooves 1011 on the three sides of the release section 101, so that bubbles are released with uniform density around the outer tube 1.

[0025] The accommodating section 102 is in the shape of a hollow circular tube. One end of the inner tube 2 extends into the accommodating section 102 and is connected to a piston 3. The piston 3 is slidably connected to the accommodating section 102. The other end face of the piston 3 is connected to a hose 4. A through hole 301 connecting the inner tube 2 and the hose 4 is provided between the two end faces of the piston 3. The hose 4 is preferably a bellows that can be axially retracted. The free end of the accommodating section 102 is connected to a flow guide tube 5 connected to the hose 4. The side of the accommodating section 102 is connected to a shunt balance tube 6. The flow guide tube 5 and the shunt balance tube 6 are both connected to a pipeline for introducing dissolved gas. When the supply pressure increases, the flow rate in the flow guide tube 5 increases, and the pressure in the shunt balance tube 6 increases. Under the action of pressure, the piston 3 drives the inner tube 2 to move axially toward the release section 101, and the number of release holes 201 that can release bubbles through the through groove 1011 increases, dispersing the gas flow rate, and avoiding the formation of bubbles that are too large, thereby ensuring that the size of each bubble is relatively consistent, and maintaining a good gas-liquid contact effect under high pressure. On the contrary, when the pressure is low, the number of bubble release ports is reduced, which can concentrate the gas flow rate and also help maintain the consistency of bubble size, avoiding the decrease in treatment efficiency caused by bubbles that are too large or too small. And when the pressure changes, by automatically adjusting the number of bubble release ports, it can ensure that the bubble density in the water body can be maintained within an ideal range regardless of high or low pressure conditions, avoiding local treatment effect differences caused by uneven bubble density.

[0026] The outer end of the shunt balance pipe 6 is connected to a pressure regulating valve 7, and the pressure of the fluid introduced into the shunt balance pipe 6 is set by the pressure regulating valve 7 to change the response node of the movement of the piston 3.

[0027] The free end of the release section 101 is provided with a sliding hole 1012 which is airtightly axially slidably connected with the inner tube 2. The end of the inner tube 2 passes through the sliding hole 1012 to the outside of the outer tube 1 and is fixedly connected with a fixing plate 8. The fixing plate 8 is provided with a guide hole 801. A guide rod 103 is fixedly connected to the end face of the release section 101. The guide rod 103 is slidably connected with the guide hole 801. A spring 104 is sleeved on the outside of the guide rod 103. The two ends of the spring 104 are respectively fixedly connected with the fixing plate 8 and the end face of the release section 101. By providing the spring 104, when the supply pressure changes, the pressure change introduced into the receiving section 102 by the shunt balance pipe 6 is automatically balanced by the elastic force of the spring 104, so that the piston 3 moves to a position where the elastic force of the spring 104 on both sides is balanced with the fluid pressure in the receiving section 102.

[0028] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary personnel in the field to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents of the present invention for protection have been fully recorded in the claims.

Claims

1. A dissolved air releaser, characterized in that: It comprises an outer tube and an inner tube, the outer tube comprises at least a release section and a receiving section, a through groove is provided on the surface of the release section along its axial direction, a plurality of release holes are provided on the surface of the inner tube along its axial direction, and the inner tube can move axially inside the outer tube to change the lengths it occupies in the release section and the receiving section respectively, and to change the number of release holes connected to the through grooves.

2. A dissolved air release device according to claim 1, characterized in that: The release section is a triangular prism-shaped hollow pipe, and through grooves are provided on the three side walls of the release section. The outer wall of the inner tube is a triangular prism that fits tightly with the inner wall of the release section, and the three side walls of the inner tube are respectively axially provided with release holes that can be connected with the through grooves.

3. A dissolved air release device according to claim 1 or 2, characterized in that: The accommodating section is in the shape of a hollow circular tube, one end of the inner tube extends into the accommodating section and is connected to a piston, the piston is slidably connected to the accommodating section, the other end face of the piston is connected to a hose, a through hole connecting the inner tube and the hose is provided between the two end faces of the piston, the free end of the accommodating section is connected to a guide tube connected to the hose, the side of the accommodating section is connected to a shunt balance tube, and the guide tube and the shunt balance tube are both connected to a pipeline for introducing dissolved gas.

4. A dissolved air release device according to claim 3, characterized in that: The free end of the release section is provided with a sliding hole which is airtightly slidably connected to the inner tube axially. The end of the inner tube passes through the sliding hole to the outside of the outer tube and is fixedly connected to a fixing plate. A guide hole is provided on the fixing plate. A guide rod is fixedly connected to the end surface of the release section. The guide rod is slidably connected to the guide hole. A spring is sleeved on the outside of the guide rod. The two ends of the spring are respectively fixedly connected to the fixing plate and the end surface of the release section.

5. A dissolved air release device according to claim 4, characterized in that: The outer end of the flow splitting balance pipe is connected to a pressure regulating valve.

6. A dissolved air release device according to claim 3, characterized in that: The hose is a corrugated tube capable of axial expansion and contraction.

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