JPH04272500A - Water exhausting pump with constant level - Google Patents

Abstract

PURPOSE:To make water exhaust while the water level in a tank is held constant by allowing a single pump to perform water supply to the tank, and inducing the syphon function interlocking therewith. CONSTITUTION:A water exhaust pipe 1 provided with an opening 3 at a point near its one end is arranged in inverted U-form, and a venturi pipe 6 provided with an opening 9 at the throat part 7 is furnished in a pipeline while penetrating a water supply pipe 5. These venturi pipe 6 and water supply pipe 5 are coupled together. The opening in the venturi pipe 6 may be in slit form 10 stretching over the whole circumference of the throat part of venturi pipe 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant water level drainage pump that drains water by a siphon effect linked to water supply while keeping the water level in the tank constant.

0002

2. Description of the Related Art Conventionally, water supply and drainage into an aquarium have been carried out using separate pump means. In other words, to drain water while keeping the water level in the tank constant, the drainage pump and water supply pump are operated while sensing the water level using mechanical means such as a float or electrical means such as a water level sensor. , each one started and stopped repeatedly.

0003

[Problems to be Solved by the Invention] Therefore, in the conventional device described above, it is necessary to separately provide a pump for water supply and a pump for drainage, and due to individual differences in pump capacity, slight fluctuations in driving power As a result, balance adjustments were delicate, and the water level would rise too high and overflow, or fall too low and expose what was underwater. Furthermore, the method of repeatedly starting and stopping the pump has the disadvantage that the range of fluctuations in water level becomes large. Furthermore, those that relied on mechanical or electrical means to sense the water level had complicated mechanisms and had problems in their reliability and durability.

[0004] Another simple method that has been commonly used is a device in which an overflow drain pipe is installed upright from the bottom of the tank to drain overflow water. Although the device is good at removing floating matter on the water surface, there remains the problem that it cannot efficiently remove dust, sludge, and filth that have settled in the tank. Furthermore, this device has the disadvantage that the water level is determined by the position of the opening at the upper end of the drain pipe, making it difficult to freely set the water level.

[0005] Therefore, the present invention has been made to solve the above-mentioned problems of the conventional technology, and its purpose is to supply water into the tank with a single pump and to The purpose of the present invention is to provide a constant water level drainage pump that can drain water while maintaining a constant water level in a tank by inducing a siphon function.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the constant water level drainage pump of the present invention has a drainage pipe with an opening formed near one end thereof arranged in a substantially inverted U shape, The present invention is characterized in that a Venturi tube having an opening formed in its throat portion is disposed in the conduit by passing through the water supply pipe, and the Venturi tube is connected to the water supply pipe.

Furthermore, if the opening is formed into a slit that extends all around the throat of the Venturi tube, the siphon-induced reaction can be made more rapid.

[0008]

[Operation] Next, the operation will be explained. When the liquid (mainly water) sent into the tank by the operation of the pump passes through the Venturi tube, negative pressure is generated in the throat due to hydraulics. Since this negative pressure communicates with the inside of the drain pipe through the opening, it also acts on the inside of the drain pipe. Here, since the drain pipe is arranged in a substantially inverted U-shape, it can function as a siphon pipe. The liquid in the tank is discharged by this sunphone function. The siphon can be activated or deactivated by blocking or closing the opening provided near one end of the drain pipe with water.

[0009]

[Embodiment] Next, an example of a specific implementation of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing the entire embodiment of a constant water level drainage pump of the present invention. The drain pipe 1 is formed of a metal or resin pipe and is arranged in a substantially inverted U-shape, with a siphon chamber 2 having an enlarged diameter integrally formed in the middle thereof. Moreover, a water suction pipe 4 having an opening 3 formed in the side surface is detachably attached to one side (the left side in the drawing) of the drain pipe 1. In addition, this water suction pipe 4
The attachment of the hole 3 is more effective if the hole 3 is slidable so that the position of the hole 3 can be freely set. In addition, the shape of the opening 3 may be a small hole, but if it is made into a long hole or a slit shape, it has the effect of reducing the sound when air is taken in.

A water supply pipe 5 is attached to the siphon chamber 2 of the drain pipe 1 so as to penetrate therethrough. A venturi pipe 6 is formed in the water supply pipe 5 at the position of the siphon chamber 2, and a small hole opening 9 is formed in the side circumferential portion 8 of the throat portion 7 of the water supply pipe 5 to communicate the siphon chamber 2 and the throat portion 7. has been established. Next, FIG. 2 shows another embodiment of the Venturi tube 6. That is, in the above embodiment, one or more openings 9 are formed in the side circumferential portion 8 of the throat portion 7, but the openings 9 are not formed as small holes, but extend over the entire circumference of the throat portion 7. The opening 10 is in the form of a slit. As a result, the negative pressure generated in the throat portion 7 can be rapidly applied to the siphon chamber 2, and the siphon can be activated quickly.

Note that the venturi tube 6 is not limited to the conical shape of the embodiment, but may also be a nozzle-shaped venturi tube. Next, an example of use of the constant water level drainage pump of this embodiment will be explained. First, a substantially inverted U-shaped drain pipe 1 is attached so as to straddle the upper wall end 12 of the water tank 11, and its water suction pipe 4 side is positioned underwater in the water tank 11. The opening 3 of the water suction pipe 4 is then set and fixed at a desired water level position. At this time, the extension pipe 14 may be attached to the water suction pipe 4 and placed at the bottom of the water tank 11. Further, the other end of the drain pipe 1 is extended and positioned underwater in the water receiving tank 14. At this time, the liquid level 15 of the water tank 14 is equal to the liquid level 16 of the water tank 11.
It is desirable to set it at a position approximately 1 meter below the ground.

Next, the water supply pipe 5 has one side located within the water tank 11 and the other side connected to a water pump 17.

[0013]

[Operation of the embodiment] With the above structure, when water is fed by the water pump 17 (arrow a), negative pressure is generated in the throat portion 7, and the air in the siphon chamber 2 is sucked through the openings 9 and 10 ( Arrow b), the sanghong chamber 2 becomes under negative pressure. This induces a siphon function in the drain pipe 1, which absorbs the liquid in the water tank and drains it into the water receiving tank 14 (arrow c).

[0014] While the liquid in the water tank 11 is blocking the opening 3, the siphon function is maintained and drainage is promoted. When the liquid level 16 falls and comes near the aperture 3, air is sucked through the aperture 3, and air bubbles are mixed into the drainage water, resulting in a multiphase flow state of water and air bubbles. The specific weight of the water becomes smaller, the suction and discharge pressure decreases, and the drainage capacity decreases. In addition, inside the drain pipe 1, the opening 9 of the throat part 7
, 10, negative pressure always occurs and never becomes atmospheric pressure. When the liquid level 16 falls below the position of the opening 3 and the opening 3 is completely exposed, only air enters from here and the inside of the siphon chamber 5 becomes atmospheric pressure. Therefore, the siphon function is canceled, drainage is stopped, and the drop of the liquid level 16 is suppressed. Note that the air sucked through the opening 3 or the air sucked together with the liquid (water) passes through the openings 9 and 10, becomes fine particles at the throat 7 of the Venturi tube 6, and mixes with the water supply into the water tank. sent into 11.

When water continues to be supplied and the liquid level 16 rises to close the opening 3, the inside of the siphon chamber 2 communicating with the openings 9 and 10 becomes under negative pressure again. Therefore, the siphon function is restored, drainage begins, and the rise in the liquid level 16 is suppressed. As described above, the liquid level 16 is maintained at the position of the opening 3 by repeatedly maintaining, stopping, and restoring the siphon function.

[0016] In many cases, when the amount of water supplied is constant and does not change, the liquid level 16 is approximately balanced at the position of the opening 3.

[0017]

[Effects of the Invention] Since the present invention is constructed as described above, it produces the following effects. ■Drainage is performed by a siphon function linked to the water supply, so there is no need to install a separate pump for drainage, and the mechanism is simple. In addition, there is the advantage that the amount of drainage and the start and stop of drainage can be adjusted only by operating the water supply pump.

■The water level maintenance mechanism is extremely simple, as the water suction pipe is provided with pores, and the water level is maintained constant by adjusting the amount of drainage by stopping and restoring the siphon function due to air entering through the pores. At the same time, it has excellent reliability. ■
Rather than draining overflowing water, the siphon function allows dust and polluted water that have settled or floated at the bottom of the tank to be sucked out and drained, making it possible to efficiently purify the inside of the tank.

[0019] Since the openings are adjustable, the liquid level can be set freely. -Also, even if the amount of water supplied is increased, the amount of discharged water also increases, so there is an advantage that a large amount of water can be supplied to form a flow in the tank and the water level can be kept constant. ■Furthermore, the air sucked through the opening passes through the opening, becomes fine particles at the throat of the Venturi tube, mixes with the water supply, and is sent into the tank, effectively melting oxygen into the water in the tank. This makes it extremely beneficial for fish breeding.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of main parts showing the entire embodiment of a constant water level drainage pump of the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of a Venturi tube.

FIG. 3 is a sectional view of a main part showing an example of use of the embodiment.

[Explanation of symbols]

Claims (2)

[Claims] Claim 1: A drain pipe (1) arranged in a substantially inverted U-shape and having an opening (3) formed near one end, and connected to a water supply pipe (5), the water supply pipe (5) A constant water level drainage pump comprising: (5) a Venturi pipe (6) which is disposed in the conduit and penetrates through the pipe and has an opening (9) formed in the throat part (7). 2. The constant water level drainage pump according to claim 1, wherein the opening (9) is in the form of a slit (10) extending all around the throat (7) of the Venturi tube (6).