JP3706316B2 - Electromagnetic diaphragm pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic diaphragm pump that utilizes deformation of a diaphragm to continuously discharge compressed gas by a volume change in a case partitioned by the diaphragm and a valve action. Such an electromagnetic diaphragm pump is used, for example, for aeration in an aeration septic tank, for oxygen supplementation of fish culture, for air fountain such as a bubble bath, a small compressor, and the like.
[0002]
[Prior art]
Conventionally, for example, an electromagnetic diaphragm pump has been used as one of pumps for aeration of septic tanks and oxygen replenishment of fish farms.
[0003]
An electromagnetic diaphragm pump is usually a box-shaped electromagnet case, a pair of electromagnets arranged and fixed so as to face each other in the electromagnet case, and the polarity of the electromagnet interposed between the opposed surfaces of the pair of electromagnets. A vibrator that reciprocates in accordance with the change is provided, and a structure in which a pair of diaphragms disposed so as to face each other is formed at both ends of the vibrator.
[0004]
In the electromagnetic diaphragm pump, the vibrator reciprocates as the polarity of the electromagnet changes, and the diaphragm connected to the vibrator vibrates, thereby sucking external air into the compression chamber and compressing the sucked air. It operates so that the operation of discharge is continuously repeated. When the air is discharged to the outside, an actual discharge operation is generally performed through a tank container that functions as a buffer provided at the lower part of the electromagnetic diaphragm pump.
[0005]
When such an electromagnetic diaphragm pump is used, for example, in a septic tank, there is a demand for a specification in which two discharge ports of a tank container are provided and the discharge port for performing a discharge operation with a control device or the like is switched over time. Under this specification, for example, one outlet is connected to an aerobic filter bed so that an aerobic operation can be performed on the aerobic filter bed that performs aerobic treatment, and the other outlet is connected to the filter bed. In order to prevent the blockage, the tank is communicated with the lower part of the tank so that a so-called back washing operation can be performed in which air is periodically discharged from a discharge pipe provided below the filter bed.
[0006]
In order to meet the above demand, Japanese Patent Laid-Open No. 10-238473 proposes a diaphragm type air pump provided with an air tank having an air flow path switching device. The air flow path switching device includes a branch port and a valve body that block the air flow path, and switching of the air flow path is controlled by the operation of the valve body via a control device.
[0007]
[Problems to be solved by the invention]
However, the one proposed in the above publication does not adopt a configuration in which the discharge port is directly closed with a valve as shown in FIGS. 1 (a) and 1 (b) of the publication, for example. That is, the flow path is branched depending on the piston movement position in the cylinder, and the branch port to the discharge port are communicated by the air chamber, and the discharge port is not directly blocked by the valve. Therefore, if the air chamber is partially sealed, the sewage may flow backward when the flow path is switched (if the reverse flow occurs, the drive system of the air flow path switching device is damaged).
[0008]
Moreover, in the method of branching the flow path at the branch port, it is necessary to provide a predetermined number of air chambers, and the partition structure of the air tank becomes complicated.
[0009]
The present invention has been devised based on such a situation, and the purpose thereof is that there is no possibility of backflow when switching the discharge port to be used, and there are few restrictions on the setting of the air chamber, and the structure is simplified. It is an object of the present invention to provide an electromagnetic diaphragm pump capable of achieving the above.
[0010]
[Means for Solving the Problems]
In order to achieve such an object, the electromagnetic diaphragm pump of the present invention utilizes a deformation of the diaphragm, and continuously discharges compressed gas by the volume change in the case partitioned by the diaphragm and the action of the valve. A main body, and a tank container that allows a compressed gas continuously discharged from the pump main body to pass therethrough and that functions as a buffer. The tank container has at least two discharge ports, and the at least two discharge ports The discharge port sealing switching mechanism unit that can directly close the discharge port is provided, and the discharge port sealing switching mechanism unit has seal protrusions that can directly block the discharge port according to the number of discharge ports. A switching valve plate, a plate support member that serves as a pivot for pivotal movement of the switching valve plate, and pivotal movement about the plate support member as a pivot Constructed and a stroke device, which is connected to the plate support member in order to.
[0012]
As a preferred aspect of the present invention, the seal protrusions of the switching valve plate are disposed so as to be substantially opposed to the discharge ports, and are respectively disposed on both sides of the plate support member serving as a support shaft for the rotational movement. Configured as follows.
[0013]
As a preferred aspect of the present invention, the stroke device includes a solenoid.
[0014]
As a preferred aspect of the present invention, a joint adapter as a connecting member is interposed between the solenoid and the switching valve plate, and the joint adapter and the switching valve plate are linked.
[0015]
As a preferred aspect of the present invention, a rubber seal portion for ensuring a seal with the seal protrusion is formed at the discharge port.
[0016]
As a preferred embodiment of the present invention, a control device for switching the discharge port seal is further incorporated.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail.
FIG. 1 is a half-piece front view showing a necessary portion of the electromagnetic diaphragm pump of the present invention in a cross-section, and FIG. 2 is a half-piece plan view mainly showing a necessary portion of the pump body of the electromagnetic diaphragm pump of the present invention in a cross-section. is there. FIG. 3 is a schematic perspective view of a tank container which is a main part of the present invention.
[0018]
The electromagnetic diaphragm pump of the present invention utilizes a deformation of the diaphragm, and a pump main body 2 that continuously discharges compressed gas by the volume change in the case partitioned by the diaphragm and the action of the valve. And a tank container 200 that allows the compressed gas discharged to pass through and functions as a buffer as a main component. Although the main part of the present invention relates to the configuration of the tank container 200, a suitable example of the pump body 2 that performs an essential pump function will be briefly described first before this description.
[0019]
(Description of the structure of the pump body 2)
As shown in FIG. 1, a plate-like bottom base plate 7 is attached and fixed to the upper surface of the tank container 200 so as to be in a sealed state. An electromagnet case 10 is installed near the approximate center of the plate-like bottom base plate 7. In general, the electromagnet case 10 is not placed directly on the bottom base plate 7 but is installed, for example, via a vibration-proof rubber 9 so that a cushioning action is substantially exerted.
[0020]
In the case of the present embodiment, the electromagnet case 10 includes a bottomed container-shaped electromagnet case body 11 having an opening and a plate-shaped electromagnet case lid (not shown) for covering the opening. It is configured.
[0021]
The electromagnet case 10 is interposed between a pair of electromagnets 21 and 25 arranged so as to face each other as shown in FIG. 2 and the facing surfaces of the pair of electromagnets 21 and 25, and the polarity change of the electromagnet Accordingly, the vibrator 30 that reciprocates in the direction perpendicular to the opposing direction of the electromagnet is inserted. Furthermore, the connecting shaft 31 is fixedly disposed at both ends of the vibrator 30, thereby arranging a pair of diaphragms 40 facing both ends of the vibrator 30.
[0022]
A diaphragm electromagnet side center plate 70 and a diaphragm valve case side center plate 80 are sandwiched and fixed at the center of the diaphragm 40, and the resonator 30 ( The connecting shaft 3) is fixed.
[0023]
The outer peripheral surface of the diaphragm 40 is fixed to the side surface of the electromagnet case 10, and the valve case main body 50 and the valve case lid body 60 are fixed to both sides of the electromagnet case 10 so as to press the diaphragm 40.
[0024]
The valve case lid 60 includes a hose connecting portion 61 protruding outward, and the upper port 91 of the L-type rubber hose 90 is inserted into the connecting portion 61, and the lower port 95 of the L-type rubber hose 90 is connected to the bottom base plate. 7 is inserted into the hole 7a.
[0025]
In this way, the electromagnet case 10 disposed on the bottom base plate 7 and the main member fixed to the electromagnet case 10 are usually completely covered by an outer case (not shown), and the bottom of the outer case Is normally fixed in a sealed state in contact with the peripheral edge of the lower tank container 200 or the peripheral edge of the bottom base plate 7.
[0026]
Based on FIGS. 1 and 2, the basic structure of the electromagnetic diaphragm pump of the present invention will be described in more detail.
[0027]
As shown in FIGS. 1 and 2, the pair of electromagnets 21 and 25 arranged to face each other includes an E-type electromagnet cores 22 and 26 and electromagnet bobbins 24 around which electromagnet coils 23 and 27 are wound. 28. The electromagnet bobbins 24 and 28 each have a cylindrical shape having flange portions 24a and 28a at both ends, and these electromagnet bobbins 24 and 28 are inserted into the central cores 22a and 26a of the E-type electromagnet cores 22 and 26, respectively. Assembled in finished form. An alternating current power supply is connected to the electromagnet coils 23 and 27 of the electromagnets 21 and 25, and the magnetic pole changes (polarity changes) are generated the same number of times as the frequency of the alternating current power supply.
[0028]
In the gap between the opposing surfaces of the pair of electromagnets 21 and 25, the vibrator 30 that reciprocates as the polarity of the electromagnets 21 and 25 changes is mounted so as not to contact the electromagnet. In the case of the present embodiment, the vibrator 30 includes a plate main body portion 35 and connecting shafts 31 formed at both ends thereof. The plate main body portion 35 includes four rectangular permanent magnets having different polarities, That is, permanent magnets 37 and 37 (for example, S pole) and permanent magnets (not shown) (for example, N pole) that are in a mirror image relationship with the permanent magnets 37 and 37 with respect to the center line are embedded.
A pair of centrally perforated disc-shaped elastic bodies (for example, rubber) diaphragms 40 are disposed at both ends of the vibrator 30 so as to face each other. The outer peripheral flange portions 41 of the pair of diaphragms 40 are connected to the electromagnet case 10. The valve case body 50 is clamped and fixed. The inner peripheral portion 45 of the diaphragm 40 is fixed in a state of being sandwiched between a diaphragm electromagnet side center plate 70 and a diaphragm valve case side center plate 80, and the vibrator 30 is fixed to these coupling plates 70, 80. (It is screwed at the tip of the connecting shaft 31).
[0030]
As shown in FIG. 2, an intake chamber 150 is formed by the valve case main body 50 and the valve case lid 60 fixed to the electromagnet case 10, and the intake chamber 150 communicates with the interior of the electromagnet case 10 through a communication hole 59. are doing. A suction valve 120 is mounted on the intake side outer wall 51 of the valve case body 50 that partitions the intake chamber 150 from the inside. By the valve action of the suction valve 120, air is sucked into the diaphragm chamber 160 through the valve vent hole 121 formed in the outer wall 51. The diaphragm chamber 160 is partitioned by the diaphragm 40, the intake side outer wall 51 and the discharge side outer wall 55 of the valve case body 50, and the discharge valve 130 is mounted on the discharge side outer wall 55 from the outside. Due to the valve action of the discharge valve 130, the air in the diaphragm chamber 160 is discharged into the discharge chamber 170 through the valve vent 131 formed in the discharge side outer wall 55. The air discharged into the discharge chamber 170 passes through the L-type rubber hose 90, enters the tank container 200 positioned below, and is discharged through a discharge port (described later) formed in the tank container 200.
[0031]
The valve actions of the intake valve 120 and the discharge valve 130 are performed based on the following operations. That is, with the change in polarity of the electromagnets 21 and 25 connected to the AC power source, the vibrator 30 reciprocates in the directions of arrows (A) and (B) in the drawing at the same frequency as the AC power source. The diaphragms 40 arranged at both ends of the vibrator 30 in synchronism with the movement of the vibrator 30 are deformed by the same displacement amount as the stroke of the vibrator 30 around the center portion of the diaphragm 40. As a result, a change in the capacity of the diaphragm chamber 160 occurs, and when attention is paid to the diaphragm chamber 160 on the right side in FIG. 2, when the diaphragm 40 is deformed in the direction of arrow (A), the diaphragm chamber 160 expands to a negative pressure. Thus, the suction valve 120 is opened, and air is sucked into the diaphragm chamber 160. On the contrary, when the diaphragm 40 is deformed in the direction of the arrow (b), the diaphragm chamber 160 is compressed to a positive pressure, the discharge valve 130 is opened, and air is discharged from the diaphragm chamber 160 into the discharge chamber 170. These operations are alternately performed continuously, and compressed air is continuously discharged. The basic operating principle itself including such a valve mechanism is already a known technique. Moreover, the structure of the pump main body 2 mentioned above has illustrated a suitable example, and is not limited to the said structure.
[0032]
(Description of configuration of tank container 200)
FIG. 3 is a schematic perspective view of a tank container 200 that is a main part of the present invention. The tank container 200 stabilizes the fluid flow by allowing the compressed gas continuously sent from the pump main body 2 located above the tank container 200 to pass through and retaining the compressed air to be discharged temporarily as described above. The compressed air is finally discharged from the tank container 200 to the outside.
[0033]
As shown in FIG. 3, the tank container 200 has two discharge ports 211 and 215 that communicate with the outside. Although the present invention can be applied to the case where three or more discharge ports are provided, the case where two discharge ports that facilitate understanding of the invention and have high possibility of implementation is described as an example. . In the tank container 200, a discharge port sealing switching mechanism 300 is installed in the tank, so that the two discharge ports 211 and 215 can be directly closed alternately.
[0034]
The discharge port sealing switching mechanism unit 300 includes a switching valve plate 310 including seal protrusions 311 and 315 that can directly and directly close the discharge ports 211 and 215, and a support shaft for rotational movement of the switching valve plate 310. And a stroke device 350 that is substantially connected to one end of the plate support member 310 so as to rotate about the plate support member 320 as a support shaft.
[0035]
Seal protrusions 311 and 315 formed to protrude at predetermined positions of the switching valve plate 310 are disposed so as to substantially face the discharge ports 211 and 215, and serve as pivots for the plate support member. They are respectively arranged on both sides of 320. Then, the switching valve plate 310 is alternately rotated in the opposite direction (oscillated) by using the plate support member 320 as a support shaft, whereby the discharge port 211 is fitted by the fitting between the seal projection 311 and the discharge port 211. The discharge port 215 is sealed by sealing or by fitting the seal projection 315 and the discharge port 215.
[0036]
The stroke device 350 includes a solenoid 351. In the embodiment of the present invention, a joint adapter 330 as a connecting member is interposed between the solenoid 351 and the switching valve plate 310, and the U-shaped member 330a of the joint adapter 330 and the connecting convex portion 310a of the switching valve plate 310 are linked. Configured to be connected. In addition, regarding the solenoid 351, it is possible to use a mechanism that can move in both the arrow (A) direction and the (B) direction alone, or the solenoid alone can move only in the (A) direction. For movement in the (b) direction, a return spring may be provided at the rear part of the solenoid 351, and movement in the (b) direction may be enabled by this return spring. The latter is preferred for cost reduction.
It is preferable that rubber seal portions 211a and 215a for ensuring sealing with the seal projection portions 311 and 315 are formed in substantial seal portions of the discharge ports 211 and 215, respectively.
[0037]
Although not shown in the drawings, it is preferable to integrate a control device for switching the discharge port seal into the electromagnetic diaphragm pump of the present invention. This is to make the device compact.
[0038]
The operation of the discharge port sealing switching mechanism of the tank container 200 described above will be briefly described. 3 is in a state where one of the two discharge ports 211 is open, and the other discharge port 215 is sealed by the seal protrusion 315. The stroke device 350 is moved (retracted) in the (B) direction. When the discharge port is changed here, the stroke device 350 moves forward in the direction (a), whereby the switching valve plate 310 rotates with the plate support member 320 as a support shaft, and the plate side including the seal protrusion 311 is The discharge port 211 is sealed by moving forward and fitting with the discharge port 211. On the other hand, the plate side provided with the seal projection 315 is retracted and disengaged from the discharge port 215, the discharge port 215 is opened, and the flow path is changed.
[0039]
【The invention's effect】
As described above, the electromagnetic diaphragm pump of the present invention utilizes the deformation of the diaphragm, the volume change in the case partitioned by the diaphragm, the pump body that continuously discharges the compressed gas by the action of the valve, A tank container that allows a compressed gas continuously discharged from the pump body to pass therethrough and performs a buffer function is provided. The tank container has at least two discharge ports, and the at least two discharge ports are alternately and directly arranged. Since it is configured to be provided with a discharge port sealing switching mechanism that can be closed, there is no risk of backflow when switching the discharge port to be used. Moreover, there are few restrictions on the setting of the air chamber, and the structure can be simplified.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a half-piece front view showing a necessary portion of an electromagnetic diaphragm pump of the present invention in section.
FIG. 2 is a half-piece plan view showing in cross section the necessary portions of the pump main body of the electromagnetic diaphragm pump of the present invention.
FIG. 3 is a schematic perspective view of a tank container which is a main part of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Electromagnetic diaphragm pump 2 ... Pump main body 200 ... Lower tank container 211, 215 ... Discharge port 310 ... Switching valve plate 311, 315 ... Seal protrusion 320 ... Plate support member 350 ... Stroke apparatus

Claims (6)

Using the deformation of the diaphragm, the volume change in the case partitioned by the diaphragm, and the pump body that discharges the compressed gas continuously by the action of the valve,
A tank container that allows the compressed gas continuously discharged from the pump body to pass therethrough and performs a buffer function;
The tank container has at least two discharge ports, and is provided with a discharge port sealing switching mechanism that can directly and directly close the at least two discharge ports ,
The discharge port sealing switching mechanism includes a switching valve plate having seal protrusions that can directly block the discharge port in accordance with the number of discharge ports, and a plate support member that serves as a support shaft for the rotational movement of the switching valve plate And a stroke device connected to the plate support member for rotating the plate support member as a support shaft . 2. The electromagnetic wave according to claim 1, wherein the seal protrusions of the switching valve plate are disposed so as to substantially face the discharge port, and are respectively disposed on both sides of a plate support member serving as a support shaft of the rotational movement. Type diaphragm pump. The electromagnetic diaphragm pump according to claim 1 , wherein the stroke device includes a solenoid. The electromagnetic diaphragm pump according to claim 3, wherein a joint adapter as a connecting member is interposed between the solenoid and the switching valve plate, and the joint adapter and the switching valve plate are linked.   The electromagnetic diaphragm pump according to any one of claims 1 to 4, wherein a rubber seal portion for ensuring a seal with the seal projection portion is formed at the discharge port. The electromagnetic diaphragm pump according to any one of claims 1 to 5 , further comprising a control device for switching the discharge port seal.

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