JPH0319400B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a vibrating column pump, that is, one end is immersed in water and the other end is placed in the air, and the other end is in elastic contact with a spring. The present invention relates to a pump that vibrates a pipe (vibrating pipe) in the longitudinal direction, which is connected to a discharge side liquid guiding pipe through a valve plate, and pumps liquid through the inside of the pipe.

[Conventional technology]

Conventionally, this type of vibrating column pump uses (a) a rotating body with an unbalanced weight rotated by an electric motor or an electromagnet as the vibrating means for the vibrating tube;
Some of these vibrators have a vibration tube fixed to the output part. (Unexamined Japanese Patent Publication No. 144700, No. 144700, Unexamined Japanese Patent Publication No. 144700)
(Refer to Publication No. 183900) In addition, (b) In order to obtain a large stroke vibration of the vibrating tube from a small stroke excitation source, the excitation means is provided by fixing one end of a plate spring to the vibrating tube, and using the plate spring or the Some devices are constructed by fixing electromagnets facing each other with an elastic body fixed to a leaf spring in between. (Tokukai Akira
(Refer to Publication No. 61-275600) Also, (c) in the excitation means, one magnet of an electromagnet having opposite poles via a permanent magnet and a spring is fixed to the vibrating tube,
The magnet fixed to the vibrating tube can be moved up and down by energizing the opposite pole of the electromagnet so that it has the same frequency polarity as the permanent magnet. There is one that pumps water by vibrating the vibrating tube. (Jitsukai 61-
(Refer to Publication No. 110900) Also, (d) The excitation means is fixed to a linear motor having a slip-thrust characteristic in which the thrust increases from the side with larger slip to the side with smaller slip and the maximum thrust is near the slip. The rotor is fixed to a stationary part, a vibrating tube is arranged opposite to the stator, and the vibrating tube is supported by a bearing so as to be movable in the axial direction, and is self-excited by the thrust-slip characteristics of the linear motor. Since a vibration system is established, the linear motor is energized to vibrate the vibrating tube, and when the vibrating tube rises, the liquid rises from the lower end of the vibrating tube, and when the vibrating tube descends, it comes into elastic contact with the upper end of the vibrating tube. Some are designed to discharge through a valve plate. (Utility Model Application Publication No. 60-197300) [Problems to be Solved by the Invention] In the above-mentioned conventional device, the method (a) generates a necessary displacement of the vibrating column, for example, 10 mm, and changes the vibration frequency to a required frequency, for example. It is difficult to achieve 60Hz, and even if manufactured, the excitation means would be large, and the vibration tube is fixed to the output part of the exciter, so the excitation device and pump are separate devices. There was a problem that it was impossible to make it into a compact shape.

In addition, the above (b) and (c) had a problem in that it was relatively difficult to control the amplitude and excitation waveform.

In addition, the method (d) above has good efficiency because it forms a self-exciting system, but has a drawback in vibration controllability.

The present invention has been made in view of the problems of the above-mentioned prior art, and it is possible to eliminate leakage, provide a large excitation force, and furthermore, by making the yoke into a unit, it is easy to set the maximum excitation force. The technical problem (object) is to provide a vibrating column pump with simplified component shapes.

[Means for Solving the Problems] In order to solve the above technical problems, the present invention opens into a liquid conduit through a valve whose lower end is immersed in the liquid and whose upper end is in elastic contact. In a vibrating column pump equipped with a vibrating means for vibrating a vibrating tube in the longitudinal direction, a cylindrical soft magnetic material is attached to the outer circumference of the vibrating tube, and permanent magnets with different magnetic poles magnetized in the radial direction are further attached to the outer circumference of the vibrating tube. are alternately arranged at intervals in the tube axis direction to serve as a mover, and an electromagnetic coil is installed outside the mover in a U-shaped electromagnetic yoke made of a soft magnetic material to serve as a stator. The present invention is characterized in that a plurality of vibrating means are arranged and fixed in the axial direction of the tube so as to reciprocate the movable element including the vibrating tube in the axial direction so as to be slidable in the axial direction.

In addition, as mentioned above, the electromagnetic yoke with a U-shaped cross section and an electromagnetic coil arranged inside it is made into a unit, and the units are stacked in the axial direction, and the maximum excitation force generated can be varied by changing the number of stages. It is characterized by

[Effect]

In the vibrating column pump of the present invention, a pair of permanent magnets having different minimum magnetization directions and two sets of electromagnetic yoke units are provided. In this case, the mover is energized by passing alternating currents in opposite directions through the two coil units. The excitation amplitude is controlled by controlling the coil current.

If a stationary liquid lift pipe is connected to the lower end of the tube axis on the opposite side to the upper end of the tube axis where the control valve (valve plate) of the vibrating tube, which is the mover, is in elastic contact, the reciprocating movement of the vibrating tube will cause the inside of the stationary liquid lift pipe to The liquid is pumped up, passes through a control valve (valve plate) at the end of the vibrating tube, and is discharged into the liquid guide tube.

In order to increase the discharge pressure of the vibrating column pump, the excitation force may be increased. Therefore, by increasing the number of unitized electromagnetic yokes and the permanent magnets facing them, the excitation force is increased or decreased in proportion to the number of electromagnetic units.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

In the figure, reference numeral 1 denotes a vibrating tube made of a magnetic material, and a plate-shaped valve 3, which is resiliently urged by a spring 2, is press-contacted (elastically connected) to the upper end of the vibrating tube 1. A permanent magnet 4 magnetized in the radial direction is fixed to the outer periphery of the vibrating tube 1 in the tube axis direction via a non-magnetic spacer 5. The permanent magnets 4 having different magnetic pole directions are arranged alternately, and the vibrating tube 1, the permanent magnets 4, and the spacer 5 constitute a mover. Note that when the vibrating tube 1 is made of a non-magnetic material, a cylindrical magnetic body is attached to the outer periphery.

On the other hand, on the stator side, a stator coil 7 is wound in a ring shape around the vibrating tube 1 on the inside (inner peripheral groove) of a U-shaped electromagnetic yoke 6 made of a magnetic material. are one unit, and in this embodiment, they are connected in four stages in the tube axis direction.

A spacer 8 made of a non-magnetic material is interposed between each magnetic pole on the inner circumference of the electromagnetic yoke 6 to seal between the stator coil 7 side and the movable element side. The mover is a spring mounted between the lower end of the vibrating tube 1 and the inner wall of a stationary liquid lift tube 10, which is connected to the lowermost end of the electromagnetic yoke 6 and whose lower end suction port 9 is inserted into the liquid during use. 11, when stationary (when stopped)
The movable element is supported so as to maintain the center stroke of the operating stroke in the tube axis direction, and the movable element is inserted through the stator with a small gap. In addition, 12 in the figure is a discharge casing having a discharge port 13, and supports one end of the spring 2 that presses the valve 3.

FIG. 2 is a sectional view of the main part of a single magnetic pole unit. On the stator side, a stator magnetic pole is formed by a U-shaped electromagnetic yoke 6 made of a yoke made of magnetic material and a stator coil 7. The movable element side is composed of a permanent magnet 4 magnetized in the radial direction and a spacer 5 made of a non-magnetic material.

The above-mentioned magnetic pole units are usually connected in two or more stages. In addition, the stator magnetic poles 6 and 7 and the permanent magnet 4
The overlap lr is taken equally at both ends of the permanent magnet 4, making it possible to form a unit.

With the structure described above, when an alternating current is passed alternately in opposite directions to each electromagnetic coil 7 during operation, the electromagnetic force in the tube axis direction generated by each stator magnetic pole 6, 7 is changed in the radial direction. A reciprocating thrust in the tube axis direction is applied to a movable element in which permanent magnets 4 with different magnetic poles are alternately magnetized to move the vibrating tube 1 up and down. The excitation amplitude is determined by controlling the coil current.

Figure 3 is a displacement-thrust static characteristic diagram with the horizontal axis representing the axial displacement of movers 1, 4, and 5 from the neutral position and the vertical axis representing the thrust force. - The part where the thrust is in the opposite direction is shown, and the second quadrant shows the part where the displacement and thrust are in the same direction. Basically, it is used in the part where the displacement and thrust shown in the first quadrant are in the opposite direction. .

Figure 4 is a diagram showing the relationship between the number of stages and thrust, with the horizontal axis representing the number of unit stages and the vertical axis representing the thrust acting on the vibrating tube at the neutral position, showing that the thrust changes in proportion to the number of stages. ing. Therefore, by adjusting the number of stages of the units, it is possible to change the magnitude of the thrust acting on the vibrating tube and change the maximum amount of water pumped.

As the vibrating tube 1 moves up and down, the following pumping action is performed, which is almost the same as that of the conventional pump.

When the valve 3 moves following the vibrating tube 1: () Rising process of liquid level When the valve 3 follows the vibrating tube 1 and moves the vibrating tube up and down, the air column pressure inside the tube increases. The liquid level inside the pipe also moves up and down as the temperature changes. This vertical movement of the liquid level is accompanied by the vibration phenomenon of a type of spring-mass system consisting of the elasticity of the air column and the mass of the liquid column.Therefore, since the damping due to friction etc. is small, the vertical movement of the vibrating tube 1 is When the vibration tube is set to the natural frequency of the air column-liquid column system inside the tube, the pressure of the air column inside the tube becomes extremely high. Therefore, if the valve 3 is opened at a pressure higher than a certain set pressure, the valve will open when the air column pressure in the pipe exceeds the set pressure of the valve, and the upper limit of the air column pressure will be maintained at the valve set pressure. The average value of the air column pressure per shaking cycle becomes less than atmospheric pressure, and the liquid column rises corresponding to the decrease in pressure. This happens continuously and the liquid level becomes vibrating tube 1.
rises to the top of the

() Liquid discharge process After the liquid level reaches the upper end of the vibrating tube 1, the liquid column pushes up the valve due to the inertia force acting on the liquid column in the tube from the vibrating tube 1, and the liquid flows out from the upper end of the vibrating tube 1. do.

When the valve moves without following the vibrating tube 1: () When the vibrating tube 1 moves downward in FIG. , a slight gap is created between the vibrating tube 1 and the valve 3.

() When the vibrating tube 1 reaches its lower limit, the valve 3 catches up and closes the valve port.

() Next, when the vibrating tube 1 rises with the valve port closed by the valve 3, the liquid rises together with the vibrating tube 1.

() When the vibrating tube 1 further descends, the liquid in the vibrating tube 1 does not go down much due to the influence of the inertia of the liquid.

By repeating this operation, the liquid reaches the upper end of the vibrating tube 1, and the vibrating tube 1
When the liquid descends, the liquid overflows into the discharge casing 12 and flows in the direction of the discharge port 13, and is then pumped up and discharged.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects.

On the outer periphery of the vibrating tube, permanent magnets with different magnetic poles magnetized in the radial direction are arranged alternately at intervals in the tube axis direction via a cylindrical soft magnetic material to serve as a movable element, and a soft magnetic material is placed on the outside of the movable element. A plurality of stators each having an electromagnetic coil installed in a U-shaped electromagnetic yoke are fixed in the tube axis direction, and an excitation means is provided to reciprocate the movable element slidably in the tube axis direction. ,
The stator coil side and the movable element side are sealed off with a small gap, making it possible to prevent pumped liquid from leaking and downsizing the device, thereby expanding the range of applications of the vibrating column pump.

In addition, the electrode yoke of the excitation means is made into a unit,
By stacking the units in the axial direction and making the maximum excitation force variable depending on the steps, it is possible to easily change the maximum water pumping amount of the vibrating column pump, and it also facilitates maintenance and improves productivity. can be improved and the range of applications expanded.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a vibrating column pump showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part of FIG. 1,
3 is a diagram showing the relationship between the displacement of the vibrating tube shown in FIG. 1 and the thrust force, and FIG. 4 is a diagram showing the relationship between the number of unit stages at the center position and the thrust force. 1... Vibration tube, 2... Spring, 3... Valve, 4...
Permanent magnet, 5... Spacer, 6... U-shaped electromagnetic yoke, 7... Electromagnetic coil, 8... Spacer, 9...
Suction port, 10... Stationary pumping pipe, 11... Spring, 1
2...Discharge casing.

Claims (1)

[Claims] 1. A vibrating tube whose lower end communicates with the liquid and whose upper end is hermetically inserted into a liquid conduit tube and opens in the liquid conduit tube, and a fixed part. In a vibrating column pump, the vibrating column pump includes a valve plate whose one end abuts and springs, and whose other end abuts the upper end of the vibrating tube, and an excitation means for vibrating the vibrating tube in the longitudinal direction. A cylindrical non-magnetic material is attached to the outer periphery, and permanent magnets magnetized in the radial direction and having different magnetic poles are arranged alternately at intervals in the tube axis direction on the outer periphery to form a mover. A plurality of electromagnetic coils are installed in a U-shaped electromagnetic yoke made of soft magnetic material to serve as a stator, and a plurality of them are arranged and fixed in the tube axis direction, and the movable element including the vibrating tube is A vibrating column pump characterized by having a vibrating means configured to slidably reciprocate in the direction of a tube axis. 2. The stationary side electromagnetic yoke of the vibration excitation means has a U-shaped cross section including the axis, and an electromagnetic coil is arranged inside the U-shape to form the electromagnetic yoke into a unit. The units are stacked in the axial direction, and the number of stages is Claim 1 characterized in that the maximum excitation force generated thereby is variable.
Vibratory column pump as described.