KR100199658B1 - Reciprocating electric pump - Google Patents

Abstract

The present invention relates to a reciprocating electronic pump that is compact and has high output, energy efficiency, durability and low cost.

The electronic pump according to the present invention is connected to one longitudinal cylinder, a permanent magnet inserted to have a working space in the left and right of the cylinder and slidably disposed left and right, and a left and right working space of the cylinder, respectively. A pair of suction pipes and discharge pipes, a pair of suction valves and discharge valves installed in the pair of suction pipes and discharge pipes to pass the fluid in only one direction, and are arranged in the middle of the outer circumference of the cylinder and opposite to each other in response to the applied alternating voltage. It consists of a solenoid for moving the permanent magnet in the cylinder to the left and right with the polarity and the polarity is periodically reversed, and the suction and discharge of the fluid alternately through the suction pipe and the discharge pipe in accordance with the left / right movement of the permanent magnet It is characterized by.

Therefore, the present invention has a simple structure, high durability, easy processing, and low manufacturing cost. When the suction force by the solenoid interacts with the magnetic force of the permanent magnet forming the piston, the suction force and the repulsive force are generated in the piston's moving direction. Increasing the driving force and thus the pumping capacity of the fluid is improved.

Description

Reciprocating Electronic Pump

1 is a longitudinal sectional view of a conventional electronic fluid pump.

2 is a longitudinal sectional view of the fluid pump shown in FIG.

3 is a partial longitudinal cross-sectional view of a reciprocating electromagnetic pump according to the present invention.

4 is a longitudinal sectional view of the electronic pump shown in FIG.

5 (a) and 5 (b) are explanatory diagrams for explaining the fluid pumping action of the present invention.

6 is a cross-sectional view showing the structure of a piston according to another embodiment of the present invention (a) and (b).

* Explanation of symbols for main parts of the drawings

21: piston 23: cylinder

25: solenoid 27A, 27B: left and right suction pipe

29A, 29B: Left / right discharge line 31A, 31B: Left / right intake valve

33A, 33B: Left / right discharge valve 35A, 35B: Left / right limit switch

37: drive control unit 39: left space

41: right space 43: sealing ring

[Purpose of invention]

[Technical field to which the invention belongs and the prior art in that field]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating electromagnetic pump, and more particularly, to an electronic pump that can be manufactured in a small size with high output and energy efficiency, excellent durability, and low cost.

In general, a fluid pump for transporting a fluid such as gas or liquid generally uses a motor as a motive force.

In other words, the method using the motor has a structure that can transfer the gas or liquid of one side to the other side by rotating the impeller by using the rotational power of the motor, but the piston connected to the rotor of the motor and the crankshaft reciprocates in the cylinder. The check valves at both ends transfer fluid by an operation of alternating opening and closing.

However, since the fluid pump basically has a motor, the energy efficiency for pumping is inevitably deteriorated. In addition, the piston and the cylinder-based method have a structural noise in the process of converting the rotational motion of the motor into a linear reciprocating motion by a crank. If large occurs as a complex structure has a problem that the production cost is high and bulky.

In order to improve this, Japanese Patent Application Laid-Open No. 56-66467 reciprocating liquid presser allows the suction and repulsion of the permanent magnet by the electromagnet to be repeated by using a commercial alternating current power so that the suction and extrusion of the object to be transported are repeated efficiently and simply. An electromagnetic fluid pump having a structure has been proposed.

The fluid pump can achieve an increase in efficiency and size reduction compared to the conventional one in that it does not have a separate motor power source, but the stroke outside position of the permanent magnet reciprocating while sucking and repelling the electromagnet, that is, the left side of the longitudinal cylinder It has a structure in which electromagnets are arranged at the right.

Therefore, there is a relatively large distance between the permanent magnet reciprocating in the cylinder and the electromagnet, and in this state, in order to obtain the starting torque required to change the direction of motion, the electromagnet consumes a lot of power which can generate an electromagnetic force inversely proportional to the square of the distance separated from the electromagnet. Was required. The result is less efficiency, and in most cases the power that can be supplied to the electromagnet is extremely limited, so these fluid pumps have a small output. Therefore, such a fluid pump is mainly used for toys or simple equipment and does not have the economical degree that can be utilized for industrial use.

[Technical problem to be achieved]

In order to solve the above problems of the prior art, another prior art has been proposed by the inventor in the Utility Model Publication No. 96-3409. In the proposal disclosed in the Utility Model Publication No. 96-3409, as shown in FIGS. 1 and 2, the permanent magnet 1 reciprocates in the longitudinal direction at a predetermined interval in the outer circumferential portion of the longitudinal cylinder 3. Four electromagnets 5A-5D enclosed in the longitudinal direction at predetermined intervals on the outer circumference of the cylinder 3 are arranged so that the entire cylinder outer periphery in the longitudinal direction is subject to the same alternating current AC applied to each electromagnet 5A-5D. Has the structure in which the same N pole or S pole electromagnet is alternated. In FIG. 1 and FIG. 2, reference numeral 7 denotes a suction pipe, 9 a discharge pipe, 11 a suction valve, 13 a discharge valve, 15 a limit switch, and 17 a drive control unit.

In the above-described conventional structure, since the distance between the permanent magnet and the electromagnet can be kept to a minimum, the electromagnetic force of the electromagnet (5A-5D) applied to the permanent magnet 1 is strongly influenced, and thus the efficiency is greatly improved. This is a structure that can be widely used.

However, the electromagnet of the fluid pump has a structure in which four driving magnets 5A-5D are wound around a core in which cores protrude along the longitudinal direction of the cylinder 1, respectively.

As a result, the size of the driving coil and the amount of current flowing through it are relatively small because the driving coil of the electromagnet which is suitable for the large fluid pump but can be divided and mounted in the outer circumference of the small diameter in the small fluid pump is limited. The electromagnetic force of the electromagnet is also small, so that the output of the fluid pump is also small. Moreover, there is a problem in that the coiling of the electromagnet is difficult and the manufacturing cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art, and its object is to provide a reciprocating electronic pump which is compact and has high output and energy efficiency, excellent durability and low cost.

[Configuration and Function of Invention]

In order to achieve the above object, the present invention is inserted into one longitudinal cylindrical cylinder, the length that can have a working space in the left and right inside the cylinder is arranged to be slidable left and right and opposite each other between the outer peripheral portion and the center A pair of suction valves, which are installed in the pair of suction pipes and discharge pipes connected to the left and right operating spaces of the cylinder, and the pair of suction pipes and discharge pipes, respectively, to the piston made of a permanent magnet having a polar magnetic pole. And a discharge valve and a polarity opposite to each other on both sides of the cylinder in response to an alternating voltage applied in the middle of the outer periphery of the cylinder and periodically inverting polarity to generate an alternating electromagnetic force for moving the piston inside the cylinder to the left / right. Consists of a solenoid, the left / right side according to the left / right movement of the piston It provides a reciprocating electronic pump characterized in that the suction and discharge of the fluid is carried out alternately through the suction pipe and the discharge pipe connected to the operating space.

According to the present invention, the piston has a rod shape as a whole, and is composed of a plurality of divided magnets having a hollow portion in the longitudinal direction or no hollow portion. In addition, between the outer circumferential portion and the inner circumferential portion of each of the divided magnets, the inner circumferential portion is set to the S pole if the outer circumferential portion is the N pole, and the inner circumferential portion is magnetized to the N pole if the outer circumferential portion is the S pole. Therefore, the outer peripheral part has the magnetic pole of N pole or S pole as the whole piston.

In addition, the solenoid is composed of a drive coil wound along the longitudinal direction on the outer periphery of the cylinder by a predetermined length.

As described above, the present invention includes a solenoid in which the drive coil is wound in the longitudinal direction on the outer circumference of the cylinder, so that when it is employed in a small output pump with a small cylinder diameter, the structure is simple, high durability, easy processing, and low manufacturing cost. In addition, it is possible to increase the number of turns and the drive current of the drive coil constituting the solenoid relatively, and the starting torque for the piston is largely generated, thereby improving energy efficiency and pumping ability of the fluid.

EXAMPLE

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

3 is a longitudinal cross-sectional view of the reciprocating electromagnetic pump according to the present invention, FIG. 4 is a longitudinal sectional view of the electron pump shown in FIG. 3, and FIGS. 5 (a) and (b) show Explanatory drawing for explaining the fluid pumping action, Figure 6 (a) and (b) is a longitudinal cross-sectional view showing the structure of a piston according to another embodiment of the present invention.

First, as shown in FIGS. 3 and 4, the fluid pump of the present invention has a piston 21 made of a rod-shaped permanent magnet inserted into the cylindrical cylinder 23 in the longitudinal direction so as to be movable left and right. The left and right suction pipes 27A and 27B in communication with the water side to be conveyed and the left and right discharge pipes 29A and 29B connected to the place where the feed material is supplied are respectively connected to the left and right sides of 23, and the left and right sides are connected to the suction pipe. Right intake valves 31A and 31B are provided, and discharge pipes are provided with left and right discharge valves 33A and 33B.

In addition, left and right limit switches 35A and 35B for detecting the approach of the piston 21 are disposed at both ends of the cylinder, and the detection signal of the switch converts the polarity period of the commercial AC input signal to the solenoid. It is applied to the drive control unit 37 for controlling the amount of power applied and the drive cycle.

The output of the drive control unit 37 is connected to the solenoid 25 in which the drive coil is wound in a circular shape in the longitudinal direction over a predetermined length capable of smoothly reciprocating the piston 21 in the middle of the outer circumferential portion of the cylindrical cylinder 23. It is. Reference numeral 43 in the drawing indicates a sealing ring.

As shown in FIG. 4, the piston 21 is composed of three divided magnets 21A-21C which form a circular rod shape as a whole, and have an S pole polarity at the outer circumference and an N pole at the inner circumference. It is magnetized. Therefore, in this case, the outer peripheral part of the piston 21 has S pole.

Meanwhile, in FIG. 3 and FIG. 4, the piston 21 of the present invention is divided into three divided magnets, but the four divided magnets 51A-51D are illustrated in FIGS. 6A and 6B. Alternatively, it is also possible to form N (N is a positive integer) divided magnets, and it is also possible to magnetize the outer circumferential portion to the N pole and the inner circumferential portion to the S pole.

In the case where the piston has a hollow portion, it is necessary to seal both inlets in order to prevent the movement of the fluid.

Furthermore, as shown in FIG. 6 (b), it is of course possible to adopt a structure without a through hole in the center of the divided permanent magnets 53A to 53D.

That is, the permanent magnets constituting the piston 21 of the present invention can be used as long as the outer circumferential surface thereof has the same N pole or S pole as a whole.

Hereinafter, the operation of the fluid pump of the present invention configured as described above will be described in detail with reference to FIGS. 5 (a) and (b).

First, as shown in FIG. 5 (a), it is assumed that the outer circumferential portion along the longitudinal direction of the permanent magnet constituting the piston 21 is the S pole and the center has the N pole polarity, and the current flow of the driving coil constituting the solenoid 25 is shown. When the direction flows out from the lower side of the cylinder 23 and flows in the upward direction, the magnetic force lines by the solenoid 25 are formed in the direction from the left side of the solenoid to enter the right side.

In this case, the piston 21 having the S-pole polarity of the outer circumference has the same polarity as the S-pole formed on the right side of the solenoid 25, so that a repulsive force is generated, and the polarity opposite to the N-pole formed on the left side of the solenoid 25 is generated. Since the suction force is generated between them, the piston 21 moves rapidly in the direction in which the suction force acts, that is, to the left of the cylinder 23.

Therefore, the fluid flowing into the left space 39 of the piston 21 of the cylinder 23 is discharged through the left discharge valve 33A and the discharge pipe 29A. At this time, the left suction valve 31A is kept closed. The right suction valve 31 is opened as the pressure in the cylinder right space 41 is lowered so that the object to be pushed is sucked into the right space 41 of the cylinder 23.

On the other hand, when the piston 21 moves to the left end of the cylinder 23, when the left limit switch 15A generates a signal and outputs the signal to the drive control unit 37, the drive control unit operates to generate the current applied to the solenoid 25. The flow direction is converted in the opposite direction to that in FIG. 5 (a) as in FIG. 5 (b), and the direction of the magnetic force lines is also reversed.

In this case, that is, when the piston 21 is located on the left side of the cylinder 23, the outer peripheral portion of the piston 21 has the same polarity as the S pole formed on the left side of the solenoid 25, so that a repulsive force is generated, and the solenoid 25 N poles formed on the right side of) have polarities opposite to each other, and suction forces are generated therebetween. As a result, the piston 21 moves in the direction in which the suction force acts, that is, to the right of the cylinder 23.

Therefore, the fluid introduced into the right space 41 of the cylinder 23 is discharged through the right discharge valve 33B and the discharge pipe 29B. At this time, the right suction valve 31B remains closed and the left suction valve 31A is opened as the pressure of the left space 39 of the cylinder is lowered, and the object to be pushed is sucked into the cylinder 23.

As a result, the fluid introduced into the cylinder 23 by the reciprocating motion of the piston 21 is pumped through the discharge pipes 33A and 33B.

On the other hand, when the piston 21 moves to the right end of the cylinder 23, the right limit switch 15B generates a signal and outputs the signal to the drive control unit 37, whereby the drive control unit operates to generate the current applied to the solenoid 25. Since the flow direction is changed as shown in FIG. 5 (a), the pumping action of the fluid is repeated.

In this case, in the present invention, since the drive coil constituting the solenoid 25 has a structure wound longitudinally along the outer periphery of the cylinder 23 in the middle of the cylinder 25 in the same space than the longitudinal winding along the conventional cylinder Relatively many coils can be wound. Therefore, when the same size has a large number of turns of the drive coil can be configured to be relatively high output.

On the contrary, when winding coils of the same length, a coil having a large diameter may be used, and thus the output of the pump may be increased as the driving current increases.

Furthermore, even when the solenoid 25 is formed by using coils having the same length and diameter, the case of winding along the longitudinal direction of the cylinder 23 as in the present invention is relatively more permanent than the case of winding along the longitudinal direction. 21, the greater the generating force of the magnetic field affecting. As a result, the energy consumption efficiency is also greatly improved compared to the conventional.

In addition, in the present invention, the entire outer surface of the reciprocating piston 21 is magnetized with the same polarity, and the drive coil wound around the outer circumference of the cylinder 23 surrounding it forms the solenoid 25 so that the polarity of the solenoid is reversed. The suction and repelling force between the momentary piston 21 and the anode end of the solenoid 25 are generated in a larger direction in which the piston should be moved than in any conventional structure. Therefore, the starting torque required to change the direction of movement of the piston 21 is greatly generated, thereby improving pumping performance.

[Effects of the Invention]

As described above, the present invention includes a solenoid in which the drive coil is wound in the longitudinal direction on the outer circumference of the cylinder, so that when it is employed in a small output pump with a small cylinder diameter, the structure is simple, high durability, easy processing, and low manufacturing cost. In addition, the winding turns and the driving current of the driving coil constituting the solenoid can be relatively increased, thereby improving energy efficiency and pumping ability of the fluid.

In addition, when the suction force by the solenoid interacts with the magnetic force of the permanent magnet constituting the piston, the suction force and repulsion force are generated in the direction of movement of the piston, thereby increasing the driving force on the piston and consequently the pumping ability of the fluid.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments and is not limited to the spirit of the present invention. Various changes and modifications can be made by those who have

Claims (4)

A piston formed of a longitudinal cylindrical cylinder and a permanent magnet inserted into a length that can be provided in the operating space at the left / right of the cylinder and slidably disposed at the left / right and having a magnetic pole of opposite polarity between the outer circumference and the center; A pair of suction pipes and discharge pipes connected to the left and right operating spaces of the cylinder, a pair of suction valves and discharge valves installed in the pair of suction pipes and the discharge pipes to pass the fluid in only one direction, and in the middle of the outer peripheral portion of the cylinder. Arranged and composed of a solenoid having opposite polarity on both sides of the cylinder in response to the applied alternating voltage and the polarity is periodically reversed to generate an alternating electromagnetic force for moving the piston inside the cylinder to the left / right, the left / right of the piston According to the right movement, through the suction pipe and the discharge pipe connected to the left / right operating space Reciprocating electromagnetic pump characterized in that the open alternately the inlet and outlet of the fluid to run. The reciprocating electromagnetic pump according to claim 1, wherein the solenoid is composed of a drive coil wound by a predetermined distance along a longitudinal direction in the middle of the cylinder. The reciprocating electromagnetic pump according to claim 1, wherein the piston is composed of a plurality of split magnets which are rod-shaped as a whole. 4. The reciprocating electromagnetic pump according to claim 3, wherein the center of the piston has a hollow in the longitudinal direction.