KR20000073549A - Solenoid pump - Google Patents

Abstract

PURPOSE: A solenoid pump is provided to realize low noise, low vibration and high efficiency by using the basic principle of a solenoid pump. CONSTITUTION: A magnetic plunger(6) reciprocates up and down by the generation of a magnetizing force. With the upward movement of the plunger, a suction valve(41) is opened by a suction force while a discharge valve(62) in the upper end of the plunger channel(61) is closed. Thus, a fluid flows to a low pressure portion(17) and the plunger channel by passing through a channel of an inlet unit(4). Herein, the pressure of the low pressure portion is reduced by the relative increase of the volume of the low pressure portion. When the plunger moves upwardly, a discharge valve(51) is opened. Thereby, the fluid in the high pressure portion is pressurized by the plunger and discharged via the channel of a discharge unit(5).

Description

Solenoid Pump {SOLENOID PUMP}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid pump, and more particularly, to a solenoid pump capable of preventing noise and capable of pumping high flow rate with heavy water pressure.

Solenoid pump is a pump utilizing magnetic material and electric induction coil. When power is applied to the induction coil, the magnetic force is formed in the induction coil and the magnetic material is reciprocated by the magnetic flux generated by the magnetic force. And to feed. Such a solenoid pump generally has the advantage of simple structure and miniaturization, but at the same time has a disadvantage of large pressure change and high noise. At present, various techniques have been proposed to compensate for these disadvantages, but considering the current processing technology, there is a problem that effective manufacturing is difficult.

The general solenoid pump is mainly employed for the purpose of generating high pressure low flow rate, but in practice, the need for a medium pressure high flow solenoid pump is more demanding. This characteristic of heavy water pressure flow rate is particularly important in the water purification device because it plays a role to protect the water purification device by forming an appropriate water pressure in the water purification equipment located at the rear of the pump, so that various conditions can be applied. do.

Next, the basic operation principle of the solenoid pump will be described with reference to FIG.

An induction coil 93 wound around a bobbin (not shown) is installed between the upper cover 91 and the lower cover 92 of the hollow cylindrical housing 90 including the upper cover 91 and the lower cover 92. When power is applied to each of the induction coils 93, a magnetization force is generated, and magnetic flux is formed by the magnetization force. At this time, a gap 94 exists at the end portions corresponding to each other of the hollow upper cover 91 and the lower cover 92 of the housing 90 so that the magnetic flux is lowered through the gap 94 from the upper cover 91. To move to 92) a large magnetoresistance is encountered. Therefore, in order to keep the magnetoresistance small, a nonmagnetic sleeve 95 is provided on the inner circumferential surface of the housing 90, and a magnetic plunger 96 is provided in the hollow of the housing 90. Thus, the nonmagnetic sleeve 95 is installed so that the magnetic flux from the upper cover 91 to the nonmagnetic sleeve 95 than when the magnetic flux passes directly through the gap 94 from the upper cover 91 to the lower cover 92. ), The magnetic resistance is kept smallest when moving to the lower cover 92 via the magnetic plunger 96 and the non-magnetic sleeve 95 in turn. Therefore, since the magnetic flux flows to the place where the magnetic resistance is low, the magnetic flux always flows in the direction of the arrow. At this time, in order to increase the efficiency of the pump by lowering the magnetoresistance, it is preferable that the thickness of the nonmagnetic sleeve 95 is made as thin as possible.

On the other hand, the power supplied to the induction coil 93 may be both direct current and alternating current, but in view of miniaturization and efficiency of the device, alternating current is more preferable. When the AC power is rectified in one direction only using a diode and the half-wave power is applied to the induction coil, the magnetic flux inside the induction coil 93 alternates, and the magnetic plunger 96 reciprocates in the hollow of the housing 90. When a valve (not shown) is installed at the hollow upper portion and the hollow lower portion, a pumping operation for discharging the fluid flowing from the hollow lower portion to the hollow upper portion by the reciprocating motion of the magnetic plunger 96 may be performed.

In the general solenoid pump structure as described above, when the inlet pressure is low, the magnetic plunger 96 collides with the high pressure part, that is, the valve (not shown) side of the hollow upper part, and the noise is severely generated. In more detail, if the pressure of the supplied fluid is higher and a higher pressure is formed during pressurization, the magnetic plunger 96 is out of the range of motion by the inertia force due to the resistance due to the high pressure when the magnetic plunger 69 rises. When the supply water pressure is relatively low, the pressure generated at the high pressure part is also lowered. Therefore, the magnetic plunger 96 collides with the high pressure part by the inertial force and violently impacts the high pressure part. It happens.

The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a solenoid pump capable of achieving low noise, low vibration, and high efficiency using the principle of a basic solenoid pump.

1 is a cross-sectional view showing a solenoid pump according to a first embodiment of the present invention.

2 is a cross-sectional view showing a solenoid pump according to a second embodiment of the present invention.

3 is a schematic diagram showing the basic operation principle of a general solenoid pump.

<Explanation of symbols for the main parts of the drawings>

1: housing, 2: induction coil,

3: first non-magnetic sleeve, 4: inlet portion,

5: discharge part, 6: magnetic plunger,

7: accumulator, 8: inlet housing,

11: upper cover, 12: lower cover,

41: suction valve, 51: discharge valve,

61: flow path, 62: flow path discharge valve,

63: second non-magnetic sleeve, 64: support rib,

67: buffer spring, 71: accumulator housing,

72: discharge port, 73: diaphragm,

74: accumulator spring

In order to achieve the above object, the solenoid pump according to the present invention comprises a housing formed by combining a ring-shaped upper cover with a lower opening and a ring-shaped lower cover with an upper opening, and having a gap formed in a hollow corresponding portion thereof; An induction coil wound between the upper cover and the lower cover; A first non-magnetic sleeve provided on the hollow inner circumferential surface of the housing; An inlet installed at a lower portion of the housing and provided with a suction valve; A discharge part installed at an upper portion of the housing and having a discharge valve installed therein; The upper and lower reciprocating is installed in the hollow of the housing, the flow path is installed inside, the second non-magnetic sleeve is installed on the outer circumferential surface, the support rib is formed on the outer circumferential surface of the second non-magnetic sleeve, and the flow path discharge valve is installed on the upper end of the flow path. A magnetic plunger; And, it characterized in that it comprises a buffer spring provided between the discharge portion and the support rib and between the inlet and the support rib.

In addition, according to the present invention, the accumulator may be further installed on the discharge portion.

According to the solenoid pump of the present invention configured as described above, when the power is applied to the induction coil, the magnetic plunger is reciprocating up and down. When the plunger moves upward, the fluid flows into the flow path of the plunger through the space between the plunger and the inlet, i.e., the low pressure part, through the inlet flow path, and the flow path discharge valve closes while the discharge valve is closed. Is opened so that the fluid present between the outlet and the plunger, ie the high pressure, is pressurized through the outlet. On the other hand, when the plunger moves downward, the suction valve is closed, the flow path discharge valve is opened, and the discharge valve is closed, so that the fluid existing in the low pressure part and the flow path of the plunger is supplied to the high pressure part. The fluid may be continuously pressurized by the repetition of the operation as described above. In this state, the upper and lower ends of the plunger are prevented from colliding with the discharge part and the inlet part by the action of the buffer springs when the plunger moves up and down, thereby effectively reducing the generation of noise.

On the other hand, when the accumulator is further provided on the upper part of the discharge part, the pressure of the discharge fluid is buffered and stored in the accumulator part, and the fluid is discharged, thereby reducing the pulsation pressure to more effectively reduce the noise and vibration, as well as the fluid pressure accumulated in the accumulator part. This action allows the fluid to be discharged so that the fluid can be discharged at a uniform pressure.

Other features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments based on the accompanying drawings.

<Example 1>

A solenoid pump according to Embodiment 1 of the present invention will be described with reference to FIG. 1.

Reference numeral 1 is a housing, which has an upper cover 11 and a lower cover 12. The upper cover 11 is formed in a ring shape and the lower part is open. In addition, the lower cover 12 is formed in a ring shape corresponding to the upper cover 11 and has an open top. Therefore, when the openings of the upper cover 11 and the lower cover 12 are coupled to each other, a space is formed between the upper cover 11 and the lower cover 12. An induction coil 2 wound around a bobbin (not shown) is installed in a space formed as described above.

As the upper cover 11 and the lower cover 12 are formed in a ring shape as described above, a hollow is formed in the center of the housing 1 in the vertical direction, and the upper cover 11 and the lower cover 12 are formed. A hollow 13 is formed at the corresponding end of the hollow side for effective movement of the magnetic flux generated when power is applied to the induction coil 2. As such, when the gap 13 is formed, since the magnetic resistance is large when the magnetic flux moves from the upper cover 11 to the lower cover 12, the first non-magnetic sleeve 3 is installed on the hollow inner circumferential surface of the housing 1. Accordingly, the magnetic flux can be kept small by moving from the upper cover 11 to the lower cover 12 via the first nonmagnetic sleeve 3. As the thickness of the first non-magnetic sleeve 3 is as small as possible, the magnetic resistance can be more effectively kept smaller.

On the other hand, an inlet 4 for introducing a fluid is provided in the lower part of the housing 1, and the inlet 4 is provided with a suction valve 41. Therefore, the fluid flows into the housing 1 as the intake valve 41 is opened. In addition, an upper portion of the housing 1 is provided with a discharge part 5 for discharging the fluid introduced into the housing 1, and the discharge part 5 is provided with a discharge valve 51.

According to the first embodiment, the magnetic body plunger 6 is vertically reciprocated in the hollow of the housing 1 in order to suck the fluid into the housing 1 and pressurize and discharge the sucked fluid to the discharge part 5 according to the up and down movement. Possible installation. The magnetic plunger 6 is formed in a substantially cylindrical shape, and a flow path 61 is formed in the upper and lower sides thereof, and a flow path discharge valve 62 is installed at an upper end of the flow path 61, and the magnetic plunger 6 is installed. The space formed between the magnetic plunger 6 and the inlet portion 4 serves as the low pressure portion 17, and the space formed between the magnetic plunger 6 and the discharge portion 5 is the high pressure portion 16. Acts as)

Therefore, when power is applied to the induction coil 2, a magnetization force is generated, and the magnetic plunger 6 thus moves up and down. When the upper portion of the magnetic plunger 6 is moved, the suction valve 41 is opened by the suction force, but the flow path discharge valve 62 installed on the upper end of the flow path 61 of the magnetic plunger 6 is closed, so that the fluid is inlet ( It flows into the flow path 61 of the low pressure part 17 and the magnetic body plunger 6 via the flow path of 4). That is, when the upper portion of the magnetic plunger 6 is moved, the pressure decreases in the low pressure portion 17 according to the increase in the volume of the low pressure portion 17 relative to the high pressure portion 16 as well as the supply pressure of the fluid itself to the inlet portion 4. As a result, the fluid can flow into the low pressure portion 17 in a low pressure state. In addition, since the discharge valve 51 is opened during the upper movement of the magnetic plunger 6, the fluid present in the high pressure portion 16 is pressurized according to the upper movement of the magnetic plunger 6 and discharged through the flow path of the discharge portion 5. .

On the other hand, when the magnetic plunger 6 is moved downward, the intake valve 41 is closed to prevent the fluid present in the low pressure portion 17 from flowing back to the inlet portion 4 and the magnetic body by the water pressure at this time. The flow path discharge valve 62 of the plunger 6 is opened and the discharge valve 51 of the discharge part 5 is closed. Therefore, the water present in the oil passage 61 of the low pressure portion 17 and the magnetic plunger 6 moves toward the high pressure portion 16. According to the reciprocating movement of the magnetic plunger 6, the fluid is introduced from the inlet portion 4 and discharged to the discharge portion 5 can be made continuously.

In order to effectively flow the magnetic flux, it is preferable that a second nonmagnetic sleeve 63 is further installed on the outer circumferential surface of the magnetic plunger 6.

When the inlet pressure is low during the suction and discharge of the fluid as described above, the magnetic plunger 6 may collide with the high pressure part 16, that is, the valve (not shown) side of the hollow part, and the noise may be severely generated. In view of such a point, in Embodiment 1, support ribs 64 are provided around the outer circumferential surface of the second non-magnetic sleeve 63 provided on the outer circumferential surface of the magnetic plunger 6, and the upper and lower ends of the support ribs 64 are separated from each other. A buffer spring 67 is provided between the inlet part 4 and the outlet part 5, respectively. The buffer springs 67 limit the vertical reciprocation of the magnetic plunger 6 to a certain range and pump the energy by providing the magnetic plunger 6 with energy stored as elastic energy during the vertical reciprocation of the magnetic plunger 6. It plays a role of increasing efficiency. That is, the upper shock absorbing spring 67 prevents excessive movement of the upper portion of the magnetic plunger 6 to prevent the upper end of the magnetic plunger 6 from colliding with the discharge portion 5, thereby removing the cause of noise and vibration. At the same time, the elastic energy accumulated when the magnetic plunger 6 is raised is applied to the magnetic plunger 6 when the magnetic plunger 6 is lowered to smoothly induce the lowering of the magnetic plunger 6. In addition, the lower buffer spring 67 allows the elastic energy accumulated during the lowering of the magnetic plunger 6 to act on the magnetic plunger 6 when the magnetic plunger 6 is raised, thereby increasing and pressing the magnetic plunger 6. Make it effective.

The upper and lower buffer springs 67 preferably have the same material and elasticity. This is because noise and vibration can be reduced by resonance only when the natural frequency is the same.

On the other hand, it is preferable that the shape and cross-sectional area of the low pressure part 17 and the high pressure part 16 formed in the hollow of the housing 1 are similar or the same. When the shape and cross-sectional area of the low pressure section 17 and the high pressure section 16 are similar or the same, the processing is simplified to facilitate the manufacture of the solenoid pump as well as to form the low pressure or the medium pressure. That is, since the pressure formed in the low pressure section 17 and the high pressure section 16 can be represented by force / section, and the force is pressure × cross-sectional area, the lifting force (ie, the pressing force) of the magnetic plunger 6 formed by the magnetization force is It is expressed as the product of the product pressure and the cross-sectional area of the plunger 6. For example, if the cross-sectional area of the high pressure portion 16 is smaller than the cross-sectional area of the low pressure portion 17, the high pressure is formed in the high pressure portion 16 while the flow rate decreases, and conversely, the cross-sectional area of the high pressure portion 16 is lower than that of the low pressure portion 17. If it is larger than that, low pressure is generated while flow rate increases. Therefore, in the first embodiment, the shape and cross-sectional area of the low pressure part 17 and the high pressure part 16 are the same or the same, so that the medium pressure is formed in the high pressure part 16 and the cross-sectional area of the high pressure part 16 is relatively small. Can supply abundant flow rate.

<Example 2>

A solenoid pump according to Embodiment 2 of the present invention will be described with reference to FIG. 2. Here, the same parts as in the first embodiment described above are denoted by the same reference numerals and detailed description thereof will be omitted.

The solenoid pump of the above-described embodiment 1 has the advantage of reducing noise and vibration and manufacturing a small-efficiency small pump at the same time as the conventional pump, but the discharge part is pressurized and discharged only when the magnetic plunger 6 is raised. The pressure of the fluid discharged through (5) is a high pressure and low pressure is repeated to generate a pulsating pressure. This pulsation pressure causes excessive vibration to the flow path through which the fluid moves, that is, the conduit (not shown) connected to the discharge part 5, thereby causing vibration of the conduit. In addition, the pulsation pressure acts as a cause of the increase in the frictional resistance of the pipeline, in particular in the case of water purification equipment adversely affects the various purification equipment installed in the rear of the pipeline.

In consideration of this point, the solenoid pump of Example 2 minimizes the vibration of the pipeline due to the pulsation pressure and compensates the pressure loss consumed by the vibration of the pipeline with energy to enable the formation of a relatively high pressure. In the solenoid pump, the accumulator 7 is further provided on the upper part of the housing 1, that is, the upper part of the inlet part 4. The accumulator 7 includes an accumulator housing 71 including an outlet portion 5 and an upper portion of the housing 1 and a discharge port 72 formed at one side thereof, and an upper portion of the accumulator housing 71. It includes a diaphragm 73 is installed in the transverse direction, and the pressure spring 74 is provided between the upper surface of the diaphragm 73 and the upper inner surface of the pressure housing (71).

Therefore, the water discharged through the discharge part 5 by the rise of the magnetic plunger 6 is introduced into the accumulator housing 71, and the diaphragm 73 expands upward by the inflow pressure, so that the inflow pressure of the fluid is increased. The buffer is reduced and the pulsation pressure is reduced, while the accumulator spring 74 is compressed to store elastic energy together with the diaphragm 73. The elastic energy stored as described above acts as a pressure energy for discharging the fluid into the pipe through the discharge port 72 according to the return of the pressure storage spring 74 and the diaphragm 73 when the magnetic plunger 6 falls. Discharge can be performed smoothly and the pulsating pressure is reduced by reducing the fluid discharge pressure difference, thereby promoting a vibration preventing effect as well as a pressure increase effect.

In fact, in the case of the solenoid pump not using the accumulator (7), if the pressure of the supply fluid is 0.5kgf / cm2, the pressure of the discharge fluid was 2.5kgf / cm2 on the average, but the solenoid with the accumulator (7) was installed. In the case of the pump, the pressure of the discharge fluid was increased to 3kgf / ㎠ showed a pressure increase effect of 0.5kgf / ㎠.

In addition, reference numeral 8 denotes an inflow housing installed at a lower portion of the housing 1 such that a suction port 81 is formed at one side and covers the inflow portion 4.

In the solenoid pump according to the present invention configured as described above, when the upper portion of the plunger 6 is raised when the plunger 6 is raised, it is possible to prevent the upper end of the plunger 6 from colliding with the discharge part 5 by the shock absorbing spring 67. And it is possible to effectively reduce the occurrence of vibration as well as the smooth lifting and lowering of the plunger (6) it is possible to manufacture a small pump of high efficiency.

In addition, it is possible to reduce the pulsation pressure generated when the fluid is discharged by the accumulator 7 to more effectively prevent the occurrence of noise and vibration, as well as to increase the pressure by reducing the pipe loss. Further increase, particularly in the case of water purification equipment can improve the durability of the water purification equipment.

Claims (2)

A housing having a ring-shaped upper cover with a lower opening and a ring-shaped lower cover with an upper opening coupled to each other, and having a gap formed therebetween; An induction coil wound between the upper cover and the lower cover; A first non-magnetic sleeve provided on the hollow inner circumferential surface of the housing; An inlet installed at a lower portion of the housing and provided with a suction valve; A discharge part installed at an upper portion of the housing and having a discharge valve installed therein; The upper and lower reciprocating is installed in the hollow of the housing, the flow path is installed inside, the second non-magnetic sleeve is installed on the outer circumferential surface, the support rib is formed on the outer circumferential surface of the second non-magnetic sleeve, and the flow path discharge valve is installed on the upper end of the flow path. A magnetic plunger; And, And a shock absorbing spring disposed between the discharge part and the support rib and between the inlet part and the support rib. According to claim 1, wherein the accumulator is further installed on the upper portion of the housing, the accumulator portion including the discharge portion to cover the upper portion of the housing, the accumulator housing having a discharge port on one side, and the upper portion of the accumulator housing A solenoid pump having a diaphragm installed in a lateral direction and a pressure spring installed between an upper surface of the diaphragm and an upper inner surface of the pressure housing.