JPH0519600U - Bubble pump - Google Patents

Abstract

(57) [Summary] [Purpose] The gas occupancy rate at each position in the pipe from the suction end to the discharge end of the air lift pipe can be kept substantially constant, and the wicking amount of liquid or liquid and solid can be increased. Provide a bubble pump capable of improving pump efficiency. A bubble pump in which a diameter of the air lift pipe 1 is increased stepwise from a lower portion of the air lift pipe 1 provided with a compressed gas outlet 2 toward an upper discharge end 5.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a solid pump and a liquid such as sludge on the bottom of a water in a fish farm, or a bubble pump for sucking the liquid above the water surface.

[0002]

[Prior Art]

 For example, as a countermeasure against sludge in a fish farm or the like, when a solid and a liquid such as sludge on the bottom of the water and a liquid are sucked up onto the water surface for treatment, a bubble pump as shown in FIG. 3 is used. This bubble pump opens a compressed gas outlet 2 in the lower part of the air lift pipe 1, and blows the compressed gas A into the air lift pipe 1 via the compressed gas pipe 3 so that the air lift pipe 1 The solid and liquid such as sludge sucked from the lower suction end 4 and the apparent specific gravity of the liquid S are sucked up to the discharge end 5 by making the apparent specific gravity smaller than that around the outside of the pipe.

The air lift pipe 1 of the conventional bubble pump has the same diameter from the suction end 4 to the discharge end 5, and the pressure of the compressed gas A blown into the pipe decreases as it rises. As it does, it expands gradually. Therefore, the proportion of gas at a certain position of the air lift pipe 1, that is, the gas occupancy rate increases as it goes upward in the pipe, and for example, solids and liquids such as sludge from a deep water depth of 10 m, Alternatively, when sucking up the liquid S, since the pressure difference between the compressed gas outlet port 2 and the discharge end 5 is large, the gas occupancy rate near the discharge port 5 becomes particularly large.

If the gas occupancy rate becomes too large, there is a problem that the suction amount of the bubble pump decreases and the pump efficiency decreases.

[0005]

[Problems to be solved by the invention]

 The present invention has been made to solve the above-mentioned conventional problems, and it is possible to keep the gas occupancy rate at each position in the pipe from the vicinity of the intake end of the air lift pipe to the discharge end almost constant, and It is an object of the present invention to provide a bubble pump that improves the pump efficiency by increasing the suction amount of liquid and liquid or liquid.

[0006]

[Means for Solving the Problems]

 The means for solving the above problems of the present invention is to increase the diameter of the inside of the air lift pipe stepwise from the compressed gas outlet at the bottom of the air lift pipe to the discharge end of the upper part. It is configured.

[0007]

[Work]

 Since the diameter of the air lift pipe increases as it goes upward, the gas occupancy rate at each position in the pipe is kept substantially constant.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side sectional view of a bubble pump of Embodiment 1 and FIG. 2 is a schematic side sectional view of a bubble pump of Embodiment 2. The same parts as those in the conventional example of FIG. 3 are indicated by the same reference numerals. First, in the bubble pump according to the first embodiment of FIG. 1, the air lift pipe 1 is moved from the compressed gas outlet 2 provided near the lower suction end 4 toward the upper discharge end 5 of the air lift pipe 1. In order to increase the diameter in the pipe stepwise, in order to increase the diameter of the upper part from the lower part stepwise in the middle of the air lift pipe 1, the deformed flanges 6A, 6B, 6C are connected at appropriate intervals. In the bubble pump of the second embodiment shown in FIG. 2, the pipes are connected while the reducers 7A, 7B, 7C having a shape in which the lower part is narrowed from the upper part are interposed in the middle of the air lift pipe 1.

The number of stages for increasing the diameter of the air lift pipe 1 and the rate of increase are determined experimentally in consideration of the property of the object to be air lifted and the transfer amount. In the bubble pump having the configuration shown in FIGS. 1 and 2, the compressed gas A blown from the compressed gas outlet 2 through the compressed gas pipe 3 to the vicinity of the suction end 4 at the lower portion of the air lift pipe 1 flows in the pipe. It expands as it rises. On the other hand, since the diameter of the air lift pipe 1 gradually increases as it goes upward, even if the gas blown into the air lift pipe 1 gradually expands, the cross-sectional area of the air lift pipe 1 increases accordingly. Therefore, the gas occupancy rate is kept substantially constant at each position in the pipe, and the wicking amount of the liquid or the liquid and the solid S can be increased.

[0010]

[Effect of the device]

 The bubble pump according to the present invention is configured such that the inner diameter of the air lift pipe is gradually increased from the compressed gas outlet at the lower part of the air lift pipe to the upper discharge end. Therefore, since the gas occupancy rate at each position of the air lift pipe can be kept substantially constant, the wicking amount of liquid or liquid and solid can be increased, and as a result, the efficiency of the bubble pump can be improved. The effect is that it can be measured.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view of a bubble pump according to a first embodiment of the present invention.

FIG. 2 is a schematic side sectional view of a bubble pump according to a second embodiment of the present invention.

FIG. 3 is a schematic side sectional view of a conventional bubble pump.

[Explanation of symbols]

1 Air lift pipe 2 Compressed gas outlet
4 Suction end 5 Discharge end 6A, 6B, 6C Deformed flange 7A, 7B, 7C Reducer A Compressed gas.

Claims (1)

[Scope of utility model registration request] 1. A bubble pump in which the inner diameter of the air lift pipe is increased stepwise from the compressed gas outlet at the bottom of the air lift pipe toward the upper discharge end.