Needle impeller for protein separation and gas-liquid mixing pump comprising the same

Abstract

The present application relates to a kind of protein separation needle impeller and gas-liquid mixing pump, it includes the impeller disc with central shaft hole, is formed with several groups of needle blade arranged according to involute on the side surface of the impeller disc, each group of needle blade is made of several interval needle leaves, each needle leaf is arranged along the direction parallel to the central shaft hole axis, and each needle leaf is in the shape of polygonal prism.In the present application, needle blade is arranged according to involute, each needle leaf is in the shape of non-circular polygonal prism, on the one hand, in the direction of rotation, the direction of most of the polygonal needle leaf water surface and water flow are perpendicular to each other, can obtain greater water area and better water effect, so that pump pressure increases and the decrease of pump pressure is very small with the increase of depth, meet the demand of deep water processing, on the other hand, the edge of the prism structure needle leaf can better cut and split the bubble, so that more amount and smaller bubble can be formed, which plays an important role in improving the performance of gas-liquid mixing pump and protein separator.

Description

Technical fields:

[0001] This invention relates to the field of pump and motor equipment technology, and specifically to a needle impeller and a gas-liquid mixing pump containing such a needle impeller. Background technology:

[0002] Water used in recirculating aquaculture systems, as well as wastewater from certain environments, contains a large amount of protein, such as algal residues, fine colloidal impurities, and biological excrement, which require timely treatment and separation. Existing protein skimmers primarily utilize gas-liquid mixing pumps to generate a large number of bubbles in the water. The surface tension of these bubbles causes proteins and flocculent matter to adhere to them and float to the surface, accumulating into a large amount of foam. This foam is then separated and treated separately, thereby maintaining a certain level of water quality to meet the needs of recirculating aquaculture systems.

[0003] Therefore, how to generate bubbles in water is the key to protein separators. Chinese utility model patent CN202926707U discloses a water pump needle brush impeller. The needles of this needle brush impeller are all cylindrical needle-shaped structures. On the one hand, the effective water-dissipating area is small and the surface is smooth, resulting in low water resistance and low pump pressure. As the water depth increases, the pump pressure drops more, making it difficult to meet the water treatment needs of depths of more than 1 meter. On the other hand, the cylindrical needle-shaped structure is difficult to collide with and break the bubbles in the gas-liquid mixing pump, resulting in poor foaming effect. Therefore, it is impossible to form a large number of small bubbles, resulting in poor foaming effect. Summary of the Invention:

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a needle impeller for protein separation and a gas-liquid mixing pump containing such a needle impeller, which solves the problems of poor bubble effect, insufficient pump pressure and difficulty in working environment with water depth of more than 1 meter in existing needle impellers.

[0005] The technical solution adopted in this invention is: a needle impeller for protein separation, which includes an impeller disk with a central shaft hole, and a number of sets of needle blades arranged in an involute pattern are formed on one side surface of the impeller disk. Each set of needle blades consists of a number of needles arranged at intervals. Each needle blade is arranged in a direction parallel to the axis of the central shaft hole, and each needle blade is in the shape of a polygonal prism.

[0006] Furthermore, a first hollow portion penetrating the impeller disk is provided in the bottom region between adjacent needles of each group of needle blades on the impeller disk.

[0007] Furthermore, a second hollow portion penetrating the impeller disk is also provided in the area between each group of adjacent needle blades on the impeller disk;

[0008] Furthermore, each group of needle-shaped blades is connected to adjacent needles by reinforcing ribs.

[0009] Furthermore, the needles are quadrangular prisms, and the spacing between adjacent needles is approximately equal to the average width of the needles themselves.

[0010] Furthermore, a notch is provided at the peripheral edge of the impeller disk and between adjacent needle blades.

[0011] The present invention also provides a gas-liquid mixing pump, including a gas-liquid mixing pump body and the above-mentioned needle impeller for protein separation.

[0012] In the aforementioned gas-liquid mixing pump, the radial cross-section of the central shaft hole of the needle impeller is "D" shaped and connected to the output shaft of the gas-liquid mixing pump body. The axial end of the impeller cavity shell of the gas-liquid mixing pump body is provided with a gas-water mixture inlet opposite to the axial direction of the needle impeller. The side of the impeller cavity shell is provided with a tangential bubble injection port. After the gas-water mixture enters from the inlet, it is repeatedly broken by the needle impeller to form finer bubbles that are sprayed into the reaction chamber of the protein separator, thereby achieving a better protein separation effect.

[0013] The present invention also provides a protein separator comprising the above-described gas-liquid mixing pump.

[0014] The present invention employs the above-mentioned structure, in which the needle blades are arranged in an involute pattern and each needle blade adopts a non-circular multi-prism structure. On the one hand, in the rotation direction, the water-facing surface of most of the multi-prism needle blades is perpendicular to the water flow (the water flow comes out from the gap between the needles of the previous group of needle blades), which can obtain a larger water-repelling area and a better water-repelling effect, maintain a more sufficient air intake and water flow, so that the pump pressure increases and the pump pressure drop is very small with the increase of depth, which can better meet the needs of deep water treatment. On the other hand, during the high-speed rotation of the impeller, the edges of the prism structure needle blades can better cut and split the bubbles, thereby forming a larger number of smaller bubbles and obtaining a better foaming effect, which plays an important role in improving the performance of gas-liquid mixing pumps and protein separators. Attached image description:

[0015] Figure 1 , Figure 2 This is a three-dimensional structural diagram of the needle impeller of the present invention;

[0016] Figure 3 , Figure 4 This is a schematic diagram of the planar structure of the needle impeller of the present invention;

[0017] Figure 5 This is a schematic diagram of the planar structure of another embodiment of the needle impeller;

[0018] Figure 6 This is a schematic diagram of the gas-liquid mixing pump of the present invention. Detailed implementation method:

[0019] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention describes a needle impeller, which includes an impeller disk 1 with a central shaft hole 10. Several sets of needle blades 11 arranged in an involute pattern are formed on one side surface of the impeller disk 1. Each set of needle blades 11 consists of several needle blades 111 arranged at intervals. Each needle blade 111 is arranged in a direction parallel to the axis of the central shaft hole 10, and each needle blade 111 is in the shape of a polygonal prism.

[0020] Furthermore, a first hollow portion 101 is provided through the impeller disk 1 in the bottom region between adjacent needle blades 111 of each group of needle blades 11 on the impeller disk 1. The shape of the first hollow portion 101 is similar to the radial cross-sectional shape of the needle blades 111, and they are also arranged at intervals. The design of the first hollow portion 101 can, on the one hand, increase the flow channel between the impeller disk 1 and the air-water mixture, further enhancing the effect of cutting and splitting bubbles; on the other hand, it also provides a better demolding method for the needle impeller produced by mold production, facilitating the mass production of the product with high efficiency.

[0021] Furthermore, such as Figure 5 As shown, a second hollow portion 102 penetrating the impeller disk 1 is also provided in the area between each group of adjacent needle blades 11 on the impeller disk 1. The function of the second hollow portion 102 is the same as that of the first hollow portion 101, which can further enhance the bubbling effect.

[0022] Furthermore, each group of needle blades 11 has a reinforcing rib 112 connecting adjacent needle blades 11, which can improve the strength of the needle blades 111 and the entire group of needle blades 11, and make the needle impeller have a longer service life.

[0023] Furthermore, the needle 111 is in the shape of a quadrangular prism, and the spacing between adjacent needles 111 is equivalent to the average width of the needle 111 itself; the needles at both ends of each group of needle blades 11 can be other polygonal prism shapes to suit installation needs.

[0024] Furthermore, a notch 103 is provided at the peripheral edge of the impeller disk 1 and between adjacent needle blades, and the notch 103 can further enhance the foaming effect.

[0025] like Figure 6As shown, the present invention also provides a gas-liquid mixing pump, including a gas-liquid mixing pump body 2 and the aforementioned needle impeller. In this gas-liquid mixing pump, the radial cross-section of the central shaft hole 10 of the needle impeller is "D" shaped and is connected to the output shaft 21 of the gas-liquid mixing pump body 2; the axial end of the impeller cavity shell 22 of the gas-liquid mixing pump body 2 is provided with a gas-water mixing fluid inlet 221 opposite to the axial direction of the needle impeller, and the side of the impeller cavity shell 22 is provided with a tangentially oriented bubble injection port 222.

[0026] When the above-mentioned gas-liquid mixing pump is used in the protein separator, a venturi tube 3 is installed at the suction port 221 to allow water and air to enter. After the gas-liquid mixture enters from the suction port 221, it is repeatedly broken up by the needle impeller to form finer bubbles that are sprayed into the reaction chamber of the protein separator, thereby achieving a better protein separation effect.

[0027] The present invention employs the above-mentioned structure, in which the needle blades are arranged in an involute pattern, and each needle blade adopts a non-circular polyprismatic structure. On the one hand, in the rotation direction, the water-facing surface of most of the polyprismatic needle blades is perpendicular to the water flow, that is, the water flows out from the gap between the needles of the previous group of needle blades and faces the needles in the next group of needle blades. This can obtain a larger water-repelling area and a better water-repelling effect, maintain a more sufficient air intake and water flow, so that the pump pressure increases and the pump pressure drop is very small with the increase of depth, which can better meet the needs of deep water treatment. On the other hand, during the high-speed rotation of the impeller, the edges of the prismatic needle blades can better cut and split the bubbles, thereby forming a larger number of smaller bubbles and obtaining a better foaming effect. This plays an important role in improving the performance of gas-liquid mixing pumps and protein separators.

[0028] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A needle impeller for protein separation, comprising an impeller disk having a central shaft bore, characterized in that: Several sets of needle-type blades are formed on one side surface of the impeller disk. The needle-type blades are composed of several needles arranged at intervals. The needles in each set of needle-type blades are arranged at intervals according to an involute pattern. Each needle is set in a direction parallel to the axis of the central shaft hole, and each needle is prismatic in shape. In the direction of rotation, the water flows out from the gap between the needles in the previous set of needle-type blades and is opposite to the needles in the next set of needle-type blades.

2. The needle impeller for protein separation according to claim 1, characterized in that: A first hollow portion penetrating the impeller disk is provided in the bottom region between adjacent needles of each group of needle blades on the impeller disk.

3. The needle impeller for protein separation according to claim 1 or 2, characterized in that: A second hollow section penetrating the impeller disk is also provided in the area between each group of adjacent needle blades on the impeller disk.

4. The needle impeller for protein separation according to claim 1, characterized in that: Each group of needle-shaped blades is connected to adjacent needles by reinforcing ribs.

5. The needle impeller for protein separation according to claim 1, characterized in that: The needles are quadrangular prisms, and the distance between adjacent needles is approximately equal to the average width of the needles themselves.

6. The needle impeller for protein separation according to claim 1, characterized in that: A notch is provided at the peripheral edge of the impeller disk and between adjacent needle blades.

7. A gas-liquid mixing pump, comprising a gas-liquid mixing pump body, characterized in that: It also includes the needle impeller for protein separation as described in any one of claims 1-6.

8. The gas-liquid mixing pump according to claim 7, characterized in that: The radial cross-section of the central shaft hole of the needle impeller is "D" shaped and is connected to the output shaft of the gas-liquid mixing pump body; the axial end of the impeller cavity shell of the gas-liquid mixing pump body is provided with a gas-water mixing fluid inlet opposite to the axial direction of the needle impeller, and the side of the impeller cavity shell is provided with a tangential bubble injection port.

9. A protein separator comprising the gas-liquid mixing pump according to any one of claims 7-8.

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