JPS6162000A - Vibration column pump - Google Patents

Abstract

PURPOSE:To hold the liquid level in a vibration pipe, whose bottom is situated under liquid and which is equipped at its top with a valve mechanism, by supporting the vibration pipe by an exciter device, and by putting the gas space in said pipe in communication to the outside air through a valve. CONSTITUTION:Bottom of a vibration pipe 3 is situated under the liquid 2 contained in a water tank 1, wherein the vibration pipe 3 is supported by an exciter rod 4 of an exciter device 4. Valve plate 8 pressed by a spring 7 in contact with the spring seat 6 is put in contact with the top of the vibration pipe 3 so as to form a valve seat 9. Here one end of a pipe 11 is fixed to the wall surface in the upper part of the vibration pipe 3, while the other end of said pipe 11 is coupled through a flexible tube 12 to a pipe 14 furnished with a valve 13. Thereby the gas in the vibration pipe 3 can be bled at a point between the above-mentioned valve plate 8 and valve seat 9 as the pipe 3 performs vertical motion, so as to permit the liquid 2 to rise into the pipe 3. The mass of the gas bled from this vibration pipe 3 is made equal to that of the gas taken in from the valve 13 by adjusting the degree of opening of the valve 13 so as to keep the liquid surface constant.

Description

[Detailed description of the invention] [Purpose of the invention] "Industrial application field" This invention relates to a pump.

``Prior Art'' Figure 6 is a vertical cross-sectional view of a vibrating column pump (No. !+7-0.2t4ttt) that the applicant has already applied for, in which a straight vibrating tube is placed in liquid a. The lower end of the vibrating tube 3 is opened and immersed, and the upper end of the vibrating tube 3 is inserted in a sealed manner into the valve casing 17 provided with the discharge port/g. The other end of the spring 7, which is in contact with and resilient, presses the valve plate g that is in contact with the upper end of the vibrating tube 3, and the vibrating tube 3
A vibrating column pump is shown that is equipped with an excitation device for longitudinally excitation. In addition, the applicant filed a patent application after filing the application for the above-mentioned invention. -047661 for a vibrating column pump. In a later invention, the lower end of the vibrating tube 3 was not directly submerged in the liquid, but the lower end of a fixed stationary tube was submerged in the liquid, and the upper end of the stationary tube was sealed through a sealing device that allowed the vibrating tube to move up and down. It differs from the previous invention in that it is connected to the lower end of the vibrating tube.

"Problems to be solved by the invention" In a vibrating column pump, if the lower end of the vibrating tube is directly submerged in the liquid, it is called a vibrating tube, and if the vibrating tube and the stationary tube are connected via a sealing device, it is called a stationary tube. and the vibrating tube becomes the suction tube.

In FIG. 6, when the vibrating device 1 is energized, the vibrating tube 3 moves up and down, and the liquid rises inside the vibrating tube 3.

Finally, the liquid flows out into the valve casing 17 from between the valve plate t and the valve seat 9 at the upper end of the vibrating tube 3, and is discharged from the discharge port itr. Such a pump action changes depending on the excitation conditions such as the excitation frequency and excitation acceleration of the excitation device y.

There are various ways to use a vibrating column pump, but in a vibrating column pump, by changing only the excitation frequency, or by changing the excitation frequency and excitation acceleration, the liquid in the vibrating tube can be brought to a certain position within the vibrating tube. It only rises and no pump action is performed. Since the liquid level in the vibrating tube is determined by the vibration conditions, the liquid level in the vibrating tube can be adjusted. This allows the water level in the container to be adjusted by submerging the suction pipe of the vibrating column pump into the container.

However, in order to be able to change the vibration conditions by controlling the vibration frequency of the vibration device, the control device for controlling the vibration device becomes complicated and expensive. Furthermore, controlling the excitation acceleration becomes even more complicated and expensive.

This invention provides a vibrating column pump equipped with a device that keeps the liquid level in the vibrating tube constant by an extremely simple and inexpensive method by keeping vibration conditions such as the excitation frequency and acceleration of the vibrating device constant. The purpose is to provide.

[Structure of the invention]

"Means for Solving the Problems" The present invention provides a vibrating tube whose lower end communicates with liquid, and which includes a valve plate with the upper end of the vibrating tube as a valve seat, and an excitation device that vibrates the vibrating tube in the longitudinal direction.

This is a vibrating column pump equipped with a valve that communicates with the outside air from the wall of the vibrating tube.

``Operation'' When the vibrating device is energized, the vibrating tube moves up and down, and the gas inside the vibrating tube escapes from between the valve plate and the valve seat.

The mass of the gas inside the vibrating tube decreases, and the liquid rises into the vibrating tube. Therefore, by adjusting the opening degree of the valve that communicates with the outside air, the mass of the gas in the vibrating tube that escapes between the valve plate and the valve seat and the gas that enters through the valve that communicates with the outside air becomes equal, which corresponds to the gas pressure in the vibrating tube at that time. The liquid rises as the height increases.

``Embodiment'' Hereinafter, an embodiment of the present invention will be described according to the drawings. 0 Figure 1 is a longitudinal cross-sectional view. It is fixed and supported by the vibration rod 3 of the output part of the vibration vibration device DA. The upper end of the vibrating tube 3 comes into contact with a valve plate pressed by a spring whose one end is in contact with a fixed spring seat, forming a valve seat. One end of the pipe l/ is fixed to a through hole in the upper wall of the vibrating tube 3, and the other end of the pipe // is connected to a pipe /4I connected to a fixed valve 13 via a flexible tube /J. Inside the vibration tube 3 is a pipe l/, a flexible tube 1.2
．． It communicates with the outside air via a pipe ll and a valve 13. The excitation device may have a constant excitation frequency and a constant excitation contribution.

When the vibrating device is energized, the vibrating rod 3 moves up and down and the vibrating tube 3
moves up and down. At this time, the pipe // vibrates together with the vibrating tube 3, and the flexible tube l- expands and contracts, and the fixed pipe III does not move.

The behavior of the pump action when the valve 13 is closed is as follows.

(4t) When vibrating so that the valve plate moves to follow the vibrating tube 3■ Rising process of liquid level The valve plate moves to follow the vibrating tube 3, and the vibrating tube 3 When the tube is moved up and down, the liquid level inside the tube also moves up and down as the pressure of the air column inside the tube fluctuates. This vertical movement of the liquid level is accompanied by the vibration phenomenon of a kind of spring-mass system consisting of the elasticity of the air column and the mass of the liquid column, and therefore the damping due to friction is small, so the vibration of the vertical movement of the vibrating tube 3 is The number of air columns in the tube -
When set to the natural frequency of the liquid column system, the pressure in the air column inside the pipe becomes extremely high. Therefore, if the valve is opened above a certain set pressure, the valve will open when the air column pressure in the pipe exceeds the valve's set pressure, and the upper limit of the air column pressure will be maintained at the valve set pressure, which will cause vibration. - The average value of the air column pressure per cycle becomes below atmospheric pressure, and the liquid column rises corresponding to the pressure decrease. This occurs continuously and the liquid level rises to the upper end of the vibrating tube 3.

■ When the valve plate j is vibrated so as to move without following the vibrating tube 3 (Figs. 2 to 1) ■ When the vibrating tube 3 moves downward in Fig. 2, the valve plate t does not follow this but moves downward with a delay, and a slight gap is created between the vibrating tube 3 and the valve plate at the upper end. At this time, the air inside the vibrating tube 3 escapes to the upper part O. When the vibrating tube 3 reaches its lower limit, the valve plate g catches up and closes the valve seat f, as shown in FIG.

When the vibrating tube 3 rises with the valve port closed by the O-valve plate j, the air inside the vibrating tube 3 expands, the pressure in both tubes decreases, and the liquid level in the tubes rises (Fig. D).

Furthermore, when the vibrating tube J descends, the liquid in the vibrating tube 3 does not fall much due to the inertia of the liquid.

Therefore, at this time as well, the gas is discharged to the top, the pressure inside the vibrating tube 3 decreases, and the liquid rises. Due to this action, when the vibrating tube 3 is not filled with liquid, the gas in the vibrating tube 3 or the valve The pressure fluctuations caused by the plate S are transmitted, and a standing wave of pressure is generated in the gas or liquid, but the pressure standing wave has a large fluctuating pressure at the valve plate g and decreases at the lower part of the vibrating tube 3. Gas escapes to the top from between the valve plate g and the valve seat 9. Similarly, by repeating the conditions ① to θ, the liquid eventually reaches the upper end of the vibrating tube 3.

If the valve 13 is kept closed, depending on the conditions under which the vibrator is vibrated, the liquid level in the tube rises to the upper end of the vibrating tube 3 and overflows from the valve opening. When valve 13 is opened, valve/3. pipe/'I
Outside air is introduced into the vibrating tube 3 through the flexible tube/:l and the pipe/l. On the other hand, the gas inside the vibrating tube 3 escapes from the valve port. Therefore, the gas pressure in the tube increases, but this depends on the amount of outside air introduced by the opening degree of the valve 13, so the liquid level in the vibrating tube 3 rises to a position that matches the gas pressure in the tube depending on the opening degree of the valve 3. .

In this way, the liquid level in the vibrating tube 3 can be adjusted according to the degree of opening of the valve 13. Therefore, the water level in the water tank 1 can also be adjusted. FIG. 3 shows another embodiment of the present invention. The first one is a vertical cross-sectional view.
The difference from the diagram is that the lower part of the fixed stationary tube 15 is submerged in the liquid, and the upper end of the stationary tube 15 and the lower end of the vibrating tube 3 are connected by a sealed flexible joint lB. can be moved up and down and communicated with the liquid tank. By vibrating the vibrating tube 3 up and down, it exhibits the same effect as the first embodiment.

〔Effect of the invention〕

In this invention, a vibrating tube whose lower end is directly or indirectly submerged in liquid is supported by an output part of a vibrating device, and a valve mechanism is provided at the upper end of the vibrating tube. Since the gas space of the pump and the outside air are communicated via a valve, there is no need to control the vibration device at all, and the liquid level in the suction pipe of the vibration column pump can be easily and inexpensively controlled. can be controlled. Alternatively, the discharge amount of the vibrating column pump can be easily adjusted. It is also possible to adjust the time for the liquid in the suction pipe (g) to rise to a height of .

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of an embodiment of the invention, and FIGS.
The figure is a longitudinal sectional view showing the effect of FIG. 1, and FIG. 5 is a longitudinal sectional view showing another embodiment of the invention. FIG. 6 is a longitudinal sectional view of a conventional example. ／・・Water tank ・・・Liquid 3・・・Vibration tube ・・・Excitation device 3・・・Excitation rod t・・Spring seat・・Spring g・・Valve plate 9・・・Valve seat／/・・・Pipe / Co..Flexible tube /3..Valve /lI..Pipe /&-.
Stationary pipe/6...Flexible joint/7...Valve casing ig...
・Discharge port.

Claims (1)

[Claims] 1. A valve that communicates with the outside air from the wall of the vibrating tube, in a device that has a valve plate with the upper end of the vibrating tube whose lower end communicates with the liquid as a valve seat and has an excitation device that vibrates the vibrating tube in the longitudinal direction. A vibrating column pump equipped with