JP2000186672A - Valve structure and electromagnetic diaphragm pump using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase ventilation flow rate by providing a plurality of ventilation holes, and thin wall plate shaped valve body for opening/closing the ventilation holes, fixing the valve body as a substantially linear valve fixing shaft at a part positioned on a nearly center line, and deforming the valve body in a flapping shape so as to open/close the ventilation holes. SOLUTION: When a diaphragm chamber 160 is expanded and pressure becomes negative pressure through a diaphragm deformed by moving an oscillator in reciprocation by an electromagnet, a valve body 122 of an intake valve 120 is opened, air is sucked into the diaphragm chamber 160 by passing ventilation holes 121. Subsequently, the valve body 132 of a discharge valve 130 is opened when the diaphragm chamber 160 is contacted, and air is discharged. In this case, each valve body 122, 132 is formed in a thin wall longitudinal plate shape, and a plurality of protrusions 127, 137 for fixing a valve are protruded on back surfaces of the valve main bodies 122, 132 along nearly center lines through rod shaped ribs 128, 138. Respectively protrusions 127, 137 are attached by fitting to a fixing hole of the valve case body 50, and the valve bodies 122, 132 are freely deformed in a flapping shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel valve structure in which a valve body is deformed in a fluttering shape, and an electromagnetic diaphragm pump to which the valve structure is suitably applied.

[0002] In the case of an electromagnetic diaphragm pump, in particular, when an alternating current is applied to an opposing electromagnet, a vibrator interposed between the opposing electromagnets reciprocates at the same frequency as the alternating current power supply, and the vibration of the vibrator is reduced. Utilizing the deformation of a pair of diaphragms arranged opposite to both ends, it acts so as to continuously discharge compressed gas by the volume change in the case partitioned by the diaphragm and the action of the valve. Such an electromagnetic diaphragm pump is
For example, it is used for aeration in an aeration-type septic tank, for oxygen supplementation of fish farming, for air blowing in a bubble bath, and a small compressor.

[0003]

2. Description of the Related Art Conventionally, an electromagnetic diaphragm pump has been used as one of pumps for aerating a septic tank or supplementing oxygen for fish farming.

[0004] Such an electromagnetic diaphragm pump is
For example, as disclosed in Japanese Utility Model Laid-Open Publication No. 2-83387, a box-shaped electromagnet case having an open top, a pair of electromagnets arranged and fixed to face each other in the electromagnet case, A vibrator interposed between the opposing surfaces of the pair of electromagnets and reciprocating with the polarity change of the electromagnets is provided. Further, a pair of diaphragms arranged so as to face each other are formed at both ends of the vibrator, and the outer peripheral edge of the diaphragm is sandwiched between an electromagnet case and a valve case main body having a suction valve and a discharge valve. Fixed.

[0005] In the electromagnetic diaphragm pump, a vibrator reciprocates in accordance with a change in the polarity of an electromagnet, and a diaphragm connected to the vibrator vibrates.
The operation of sucking the external air into the compression chamber and compressing and discharging the sucked air is continuously repeated through the suction valve and the discharge valve.

As an intake valve and a discharge valve used in such an electromagnetic diaphragm pump, a so-called umbrella valve is generally used in many cases. It has a shape with a valve fixing shaft protruding from the part. The thin-walled valve head acts to control the opening and closing of a ventilation hole, which is an air flow port, in accordance with the vibration of the diaphragm. Normally, a ventilation hole, which is an air circulation port, is provided for each of intake and discharge valves.
About 1 to about 10 round holes each having a maximum diameter of about 5 mm are formed on the circumference around the valve fixing shaft.

By the way, the flow rate through the vent hole is one of the indexes of the pump performance, and in the actual design stage, there is a case where it is desired to increase the flow rate while keeping the size of the apparatus itself. However, if the diameter per vent hole is increased to increase the flow rate of the vent, a thin valve head portion is deformed so as to be sunk into the vent hole by back pressure at the time of sealing the vent hole. There is a possibility that the durability of the film may be reduced. On the other hand, increasing the number of holes by reducing the diameter per air hole increases the pipe resistance of the air holes, and reduces the flow rate per unit hole area. To address such issues, for example,
As disclosed in Japanese Utility Model Publication No. 7-36139,
A method of increasing the number of disk-shaped valves themselves and providing two or more valves is also conceivable.

[0008]

However, in such a method, the number of parts is increased, the number of assembling steps and the number of man-hours for managing members are increased, which directly leads to an increase in cost. Further, there is a demand for the development of a new valve structure capable of expecting a markedly higher ventilation flow rate than such a disk-shaped valve structure.

The present invention has been devised in view of such circumstances, and an object of the present invention is to provide a valve structure capable of remarkably improving a ventilation flow rate (a ventilation flow rate per unit hole area) and to use the valve structure. An object of the present invention is to provide an electromagnetic diaphragm pump. As a result, a large flow rate can be obtained even with a small pressure, and the size of the apparatus can be reduced when the same flow rate is desired from the opposite viewpoint. Another object of the present invention is to provide a valve structure having excellent durability and capable of reducing the number of working steps, and an electromagnetic diaphragm pump using the same.

[0010]

In order to achieve the above object, the present invention provides a valve structure having a thin plate-shaped valve body having a plurality of ventilation holes and a sealing surface for opening and closing the ventilation holes. Wherein the valve body is fixed as a substantially linear valve fixed shaft at a position located substantially at the center line, and the valve body is deformed in a flapping shape with the valve fixed shaft as a base line. The opening and closing of the vent hole is performed.

The present invention also provides a valve structure having a thin plate-shaped valve body having a plurality of ventilation holes and a sealing surface for opening and closing the ventilation holes, wherein the valve body has a thin long plate shape. None, is fixed as a substantially linear valve fixing shaft at a position located at a substantially center line along the longitudinal direction, and the vent has portions arranged along both sides of the valve fixing shaft. The valve body is configured such that the valve body opens and closes the vent hole by deforming in a flapping shape with the valve fixed shaft as a base line.

In a preferred aspect of the valve body of the present invention, a plurality of valve fixing projections for fixing as a valve fixing shaft are arranged at a position located substantially at the center line of the valve body. Be composed.

In a preferred aspect of the valve body of the present invention, a fixing member for fixing the valve body as a valve fixing shaft is further mounted at a position located substantially at the center line of the valve body. .

In a preferred aspect of the valve body of the present invention, the plurality of valve fixing projections are configured to be connected to the valve body via protruding rod-shaped ribs.

The present invention also provides an electromagnet case having a housing shape, a pair of electromagnets disposed to face each other in the electromagnet case, and a polarity of the electromagnet interposed between opposing surfaces of the pair of electromagnets. Along with the change, a vibrator reciprocating in a direction perpendicular to the facing direction of the electromagnet, a pair of elastic diaphragms arranged to oppose both ends of the vibrator, and a plurality of diaphragms separated by the diaphragm, And a valve case body having a suction valve and a discharge valve having a thin plate-shaped valve body having a sealing surface for opening and closing the vent hole. The valve body of the suction valve and the valve body of the discharge valve that are fixed so as to have a valve function are each fixed as a substantially linear valve fixed shaft at a position located substantially at the center line, and are based on the valve fixed shaft. As configured as opening and closing of the vent hole by the valve body is made by the valve body shape flapping deformation.

In a preferred embodiment of the electromagnetic diaphragm pump according to the present invention, the valve body has a thin and long plate shape, and has a substantially linear valve fixing portion located at a substantially center line along the longitudinal direction. Fixed as a shaft, the vent hole is
It has portions arranged along both sides of the valve fixed shaft,
The valve body is configured such that the valve body opens and closes the vent hole by deforming in a flapping shape with the valve fixed shaft as a base line.

In a preferred embodiment of the electromagnetic diaphragm pump according to the present invention, a plurality of valve fixing projections for fixing as a valve fixing shaft are arranged at a position located substantially at the center line of the valve body. It is configured as follows.

In a preferred embodiment of the electromagnetic diaphragm pump according to the present invention, a fixing member for fixing as a valve fixing shaft is further mounted at a position located substantially at the center line of the valve body. Is done.

In a preferred embodiment of the electromagnetic diaphragm pump according to the present invention, the plurality of valve fixing projections are configured to be connected to the valve main body via protruding rod-shaped ribs.

The valve body according to the present invention is fixed as a substantially straight valve fixing shaft at a position located substantially at the center line,
The valve body is deformed in a flapping shape with the valve fixed shaft as a base line. Therefore, the lift resistance is reduced, the lift height is increased, the opening of the ventilation hole is sufficiently made, and the flow rate is increased.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In order to facilitate the understanding of the valve structure of the present invention, a case where the valve structure is applied to an electromagnetic diaphragm pump will be described below as a preferred example.

FIG. 1 is a perspective view schematically showing a state in which an electromagnetic diaphragm pump 1 of the present invention is disassembled into individual main parts.

FIG. 2 is a front view showing a necessary portion of a main part of the electromagnetic diaphragm pump of the present invention in a sectional view, and FIG.
FIG. 1 is a cross-sectional plan view showing a necessary portion of a main part of an electromagnetic diaphragm pump of the present invention.

As shown in FIG. 1, the lower tank container 5
A plate-shaped bottom base plate 7 is attached and fixed to the upper surface of the base plate so as to be in a sealed state. An electromagnet case 10 is installed on the plate-shaped bottom base plate 7 near the approximate center thereof. The electromagnet case 10 is not generally placed directly on the bottom base plate 7 but is installed, for example, via a vibration-proof rubber 9 so that a cushioning effect is substantially exerted. In the case of the present embodiment, the electromagnet case 10 is an electromagnet case body 11 having a bottomed container shape having an opening.
And a plate-shaped electromagnet case lid 1 for covering the opening.
5 is constituted.

The electromagnet case 10 is provided between a pair of electromagnets 21 and 25 disposed to face each other, and the electromagnet case 10 is interposed between the opposing surfaces of the pair of electromagnets 21 and 25. A vibrator 30 that reciprocates in a direction perpendicular to the opposite direction is inserted. Further, the vibrator 30
The connecting shafts 31 are fixedly arranged at both ends of the vibrator 30, whereby a pair of diaphragms 40 facing the both ends of the vibrator 30 are arranged.

At the center of the diaphragm 40, a diaphragm electromagnet side center plate 70 and a diaphragm valve case side center plate 80 are fixed in a sandwiched state, and these coupling plates 70, 80 substantially vibrate. The child 30 (the connecting shaft 31, 31) is fixed.

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 cover 60 are pressed so as to press the diaphragm 40.
Are fixed to both sides of the electromagnet case 10.

The valve case main body 50 is provided with a suction valve 120 and a discharge valve 130 in specific directions so as to perform predetermined functions (suction and discharge), respectively.
This will become more apparent in the description of FIG. 3 described below.

The valve case lid 60 has a hose connecting portion 61 protruding to the outside. An upper port 91 of an L-shaped rubber hose 90 is inserted into the connecting portion 61, and a lower port 95 of the L-shaped rubber hose 90 has a bottom portion. It is inserted into the hole 7a of the base plate 7.

The electromagnet case 10 arranged on the bottom base plate 7 and the above-mentioned main members fixed thereto are completely covered by the outer case 100, and the bottom of the outer case 100 is usually Are fixed in a hermetically sealed state while being in contact with the peripheral edge of the lower tank container 5 or the peripheral edge of the bottom base plate 7. Outer case 100
Has an air filter (not shown) at its upper part, and external air is supplied to the outer casing 10 through the air filter.
The air filter is fixed by the air filter cover 101 so as to flow into the inside of the air filter. Reference numeral 110 in FIG. 1 indicates a rubber leg.

Next, the basic structure of the electromagnetic diaphragm pump of the present invention will be described in more detail with reference to FIGS.

As shown in FIGS. 2 and 3, a pair of electromagnets 21 and 25 arranged opposite to each other
Type electromagnet cores 22 and 26 and electromagnet coils 23 and 27
Are wound around the electromagnet bobbins 24 and 28. The electromagnet bobbins 24 and 28 each have a flange 2 at each end.
The electromagnet bobbins 24 and 28 are assembled in a cylindrical shape having 4a and 28a inserted into the central cores 22a and 26a of the E-shaped electromagnet cores 22 and 26, respectively. Electromagnet coil 2 of electromagnets 21 and 25
An AC power supply is connected to 3, 27 so that the number of magnetic pole changes (polarity changes) occurs the same number of times as the frequency of the AC power supply.

In such a gap between the opposing surfaces of the pair of electromagnets 21 and 25, a vibrator 30 that reciprocates in accordance with a change in polarity of the electromagnets 21 and 25 is mounted so as not to contact the electromagnets. In the case of the present embodiment, the vibrator 30 has a plate body 35 and connection shafts 31 formed at both ends thereof, and the plate body 35 has four rectangular permanent magnets having different polarities. The magnets 36, 36 (for example, N
), 37, 37 (for example, S pole) are buried.

At both ends of the vibrator 30, a pair of disc-shaped elastic bodies (for example, rubber) 40 having a center hole are disposed so as to face each other.
The outer peripheral flange portion 41 is sandwiched and fixed between the electromagnet case 10 and the valve case main body 50. Diaphragm 4
The inner peripheral portion 45 of the diaphragm 0 is fixed while being sandwiched between the diaphragm electromagnet-side center plate 70 and the 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, 31).

As shown in FIG. 3, the electromagnet case 10
Case body 50 and valve case lid 60 secured to
Thus, an intake chamber 150 is formed.
Communicates with the inside of the electromagnet case 10 through a communication hole 59. An intake valve 120 is mounted on the intake-side outer wall 51 of the valve case main body 50 that partitions the intake chamber 150 from inside.

By the valve action of the suction valve 120, air is sucked into the diaphragm chamber 160 through the vent hole 121 formed in the outer wall 51 as shown in FIG. The diaphragm chamber 160 is defined 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-side outer wall 55 has the discharge valve 13.
0 is mounted from the outside.

It is desirable that the form of the discharge valve 130 is basically the same as that of the above-described suction valve 120.

By the valve action of the discharge valve 130, as shown in FIG. 3, the air in the diaphragm chamber 160 is discharged to the discharge chamber 170 through the ventilation hole 131 formed in the discharge-side outer wall 55. Has become. Discharge chamber 170
Is discharged into the lower tank container 5 through the L-shaped rubber hose 90, and is discharged through the discharge port 5a (FIG. 1).

The valve action of the suction valve 120 and the discharge valve 130 is performed based on the following operation. In other words, the vibrator 30 reciprocates in the directions indicated by arrows (a) and (b) at the same frequency as the AC power supply in accordance with the polarity change of the electromagnets 21 and 25 connected to the AC power supply. The diaphragms 40 disposed at both ends of the vibrator 30 in synchronization with the movement of the vibrator 30 deform around the center of the diaphragm 40 with the same displacement as the stroke of the vibrator 30. As a result, the capacity of the diaphragm chamber 160 changes, and if attention is paid to the diaphragm chamber 160 on the right side in FIG. 3, when the diaphragm 40 is deformed in the direction of the arrow (a), the diaphragm chamber 160 expands to a negative pressure. Become
The suction valve 120 opens, and air is sucked into the diaphragm chamber 160. Conversely, 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 inside of the diaphragm chamber 160 to the discharge chamber 170. These operations are performed alternately and continuously, and the compressed air is continuously discharged. The basic operating principle itself including such a valve mechanism is a known technique.

The essential part of the present invention according to the present invention is a valve structure having a thin plate-shaped valve body having a plurality of ventilation holes and a sealing surface for opening and closing the ventilation holes.
A substantially linear valve fixing shaft is fixed at a position located substantially at the center line, and the valve main body is deformed in a flapping shape with the valve fixing shaft as a base line, so that the opening and closing of the ventilation hole by the valve main body is performed. In the configuration.

The main part of the invention will be described in detail with reference to FIGS.

FIG. 4A is a front view of a so-called valve serving as the suction valve 120 and the discharge valve 130, and FIG.
It is a bottom view of (a). FIG. 5A is a front view of a valve case main body 50 having a plurality of ventilation holes, to which an intake valve 120 and a discharge valve 130 for opening and closing the ventilation holes are attached, and FIG. It is an AA sectional arrow view of (a). FIGS. 6A to 6C are drawings for explaining the operation of the suction valve 120 and the discharge valve 130 attached to the valve case main body 50.

In the present invention, the suction valve 120 (discharge valve 13)
0; the code in parentheses () indicates the one related to the discharge valve)
FIGS. 4 and 5 show a detailed configuration of the valve case body 50 to which these components are attached, respectively. FIG.
As shown in FIG. 1, the suction valve 12 preferably used in the present invention.
0 (130) is a thin and long plate-shaped valve body 122 (132)
And the back surface of the valve body 122 (132) (the sealing surface 12).
2a (functions as 132a)) and a bar-like rib 128 (138) formed so as to protrude substantially along the center line.
And five valve fixing projections 127 (137) connected to the rod-shaped ribs 128 (138).

The rod-shaped rib 128 (138) is fitted into the fitting groove 53 (FIG. 5) of the valve case main body 50 when the suction valve 120 (130) is attached to the valve case main body 50 described later. It acts to ensure that the position is fixed.

In the case of this embodiment, the valve fixing projection 127 is used.
(137) is an insertion shaft portion 127a (137a) and a locking projection 127b (137b) for preventing removal after fixing.
And an insertion assist taper portion 127c (137c). After the insertion auxiliary taper part 127c (137c) is attached,
It may be cut and removed. Such a valve fixing projection 12
7 (137) are arranged substantially linearly so that a substantially linear valve fixing shaft can be formed as described later. Regarding the number of the valve fixing projections 127 (137),
What is necessary is just to determine suitably within the range which can fix a linear shape reliably.

Such a suction valve 120 (discharge valve 130)
As shown in FIG. 5, the valve case main body 50 to which is mounted is provided with a plurality of penetrating suction holes 121 (22 pieces;
The plurality of discharge vents 131 (22 pieces; arranged in a substantially rectangular shape as shown) for discharge, and the valve fixing projections 127 and 13 as shown in FIG.
7 for inserting and fixing the suction valve 7.
Pieces; linearly arranged) and discharge valve insertion fixing holes 58 (5
Pieces; linearly arranged).

The suction valve insertion fixing hole 57 is provided with the suction valve 120.
Are arranged substantially linearly at the same pitch as the projections 127 so that the valve fixing projections 127 can be inserted and fixed, and these are integrated and fixed, and the valve body 122 of the suction valve 120 is substantially Linear valve fixed shaft (F-F direction)
When the valve body 122 is deformed in a flapping shape with the valve fixing shaft (the FF direction) as a base line, the vent hole 121 is opened and closed by the valve body 122 (see FIG. 6 described later). It can be easily understood by the explanation based on.)

Similarly, a discharge valve insertion fixing hole 58 is provided.
Are arranged substantially linearly at the same pitch as the projections 137 so that the valve fixing projections 137 of the discharge valve 130 can be inserted and fixed. The main body 132 is fixed as a substantially linear valve fixing shaft (F′-F ′ direction), and the valve main body 132 is deformed in a flapping shape with the valve fixing shaft (F′-F ′ direction) as a base line. This allows the valve body 132 to open and close the ventilation hole 131. The two valve fixed shafts (F-F direction) and the valve fixed shaft (F'-F 'direction) are usually in the same direction, but may be different. The term “substantially straight” as used in the present invention is a concept including not only a perfect straight line but also some curved lines or broken lines within a range not departing from the effects of the present invention.

Further, as a preferred embodiment of the present invention,
As shown in FIG. 5A, the plurality of suction holes 121 and the plurality of discharge holes 131 have portions arranged along both sides of each valve fixed shaft, as shown in FIG. A large amount of air is efficiently circulated from the air holes in the portions arranged in this manner. Each valve body 122, 132
The reason for this is that the vent hole can be sufficiently opened and closed by deforming in a flapping shape with the valve fixed shaft as a base line.

The valve body 122 and the valve body 1 are fluttered.
The manner in which 32 is deformed will be described with reference to FIG. FIG.
4A, the suction valve 120 and the discharge valve 130 shown in FIG. 4 are inserted into the suction valve insertion fixing hole 57 and the discharge valve insertion fixing hole 58 of the valve case main body 50 shown in FIG. 5, respectively. The mounted state is shown. Each valve body 122,
Reference numeral 132 denotes a valve fixing axis direction (F-F, F'-F ') in the depth direction or the front direction of the drawing (the same as the center line direction P), and is the longitudinal direction of the valve. With the deformation of the diaphragm, when the diaphragm chamber 160 expands to a negative pressure, the valve body 122 of the suction valve 120 opens,
Air is sucked into the diaphragm chamber 160. On this occasion,
The valve body 122 shown in FIG. 6 has a plurality of ventilation holes 1 formed by the valve body 122 when the valve body 122 is deformed in a flapping shape with the valve fixing axis in the depth direction or the front direction of the drawing as a base line.
21 is provided (FIG. 6B). The lift height h1 of the valve body 122 based on the flapping deformation is extremely large, and can be operated at a low pressure.

Next, with the deformation of the diaphragm in the reverse direction, the diaphragm chamber 160 is compressed to a positive pressure, the valve body 132 of the discharge valve 130 opens, and air is discharged from the inside of the diaphragm chamber 160 to the discharge chamber ( FIG. 6 (c)). Also in this case, the lift height h2 of the valve body 132 based on the flapping deformation is extremely large, and the operation at a low pressure is possible. These FIGS. 6B to 6C
Are performed alternately and continuously, and the compressed air is continuously discharged.

The suction valve 120 and the discharge valve 130 may be of a type in which the valve fixing projections 127 and 137 (FIG. 4A) are not formed. In this case,
A fixing member for fixing as a valve fixing shaft is further mounted as an additional member at a position located substantially at the center line of the valve body. Specifically, screws and rivets are fixed as fixing members.

The thickness of the valve bodies 122 and 132 in the present invention can be appropriately selected according to the rubber material to be used and the setting specifications of the pump, and is not particularly limited. It is about 5 to 1.5 mm. There is no particular limitation on the rubber material used. For example, EPDM and silicone rubber are preferable examples. Nitrile rubber, fluorosilicone rubber, hydrin rubber, fluoro rubber, and the like may be used. These are appropriately selected and used depending on the operating temperature and the contact fluid.

The number of the suction valve 120 and the number of the discharge valve 130 used in the present invention are desirably one each, but it is also possible to provide two or more for the necessity of design.

The valve structure of the present invention is not limited to an electromagnetic diaphragm pump, but also includes a fuel pump valve, a sphygmomanometer exhaust valve, a dash pot delay valve, a fuel tank internal pressure adjusting valve, a well pump air supply valve, and an ink jet valve. It can be applied to various fields such as a printer pump, a medical transfusion check valve, and a vending machine valve.

[0056]

The present invention will be described below in more detail with reference to specific examples.

A suction valve 120 and a discharge valve 130 having a shape as shown in FIG. 4 (the width of the valve body is 17 mm; the length is 61
mm; thickness 0.8 mm) made of rubber EPDM,
It was mounted on a valve case body as shown in FIG. In addition,
Each of the suction vent hole 121 and the discharge vent hole 131 formed in the valve case body was Φ4 mm × 22 (the total hole area for suction and discharge was respectively
276 mm ² ). This was assembled into an electromagnetic diaphragm pump as shown in FIG. 2, and an experiment was conducted to determine how much the flow rate could be secured by actually operating the pump.

For comparison with this, a valve structure of the type conventionally proposed, that is, Japanese Utility Model Publication No. 7-36139, has been proposed.
As disclosed in Japanese Patent Application Laid-Open Publication No. H10-260, two disc-shaped valves are attached to the valve case body on the suction side and the discharge side, respectively (total hole area for suction and discharge is 276 mm ² ),
Other than that, it was incorporated into an electromagnetic diaphragm pump similar to that shown in FIG. 2, and a comparative experiment was conducted to see how much the flow rate could be secured by actually operating the pump.

As a result, in the pump having the valve body which deforms in a flapping shape according to the present invention, the valve body can be lifted smoothly, the lift amount is large, and 15.
It was confirmed that the flow rate increased by 4%.

[0060]

The effects of the present invention are clear from the above results. That is, the present invention is a valve structure having a thin plate-shaped valve body having a plurality of ventilation holes and a sealing surface for opening and closing the ventilation holes, wherein the valve body is located at a position substantially located at the center line. Fixed as a substantially straight valve fixed shaft,
Since the valve body is deformed in a fluttering shape with the valve fixed shaft as a base line, the ventilation hole is opened and closed by the valve body, so that the ventilation flow rate (the ventilation flow rate per unit hole area) is remarkable. Improvement is achieved. As a result, a large flow rate can be obtained even with a small pressure, and when the same flow rate is desired to be obtained from the opposite viewpoint, the size can be reduced. Moreover,
It also has the effect of being excellent in durability and capable of reducing work steps.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a state in which an electromagnetic diaphragm pump of the present invention is disassembled into individual main parts.

FIG. 2 is a front view showing, in cross section, necessary parts of main parts of the electromagnetic diaphragm pump of the present invention.

FIG. 3 is a plan view showing a necessary portion of a main part of the electromagnetic diaphragm pump of the present invention in a cross section.

FIG. 4 (a) is a front view of a so-called valve serving as an intake valve and a discharge valve, and FIG. 4 (b) is a bottom view of FIG. 4 (a).

5 (a) is a front view of a valve case main body provided with a plurality of ventilation holes and fitted with a suction valve and a discharge valve for opening and closing the ventilation holes, and FIG. 5 (a)
3 is a sectional view taken along the line AA of FIG.

6 (a) to 6 (c) are drawings for explaining the operation of a suction valve and a discharge valve attached to a valve case main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electromagnetic diaphragm pump 5 ... Lower tank container 7 ... Bottom base plate 10 ... Electromagnetic case 11 ... Electromagnetic case main body 15 ... Electromagnetic case lid 17 ... Air intake port 21, 25 ... Electromagnet 30 ... Vibrator 40 ... Diaphragm 50 ... Valve case body 60 ... Valve case lid 70 ... Diaphragm electromagnet side center plate 80 ... Diaphragm valve case side center plate 90 ... L-shaped rubber hose 100 ... Outer case 120 ... Suction valve 120a ... Seal surface 121 ... Vent hole 122 ... Valve body 127: Valve fixing projection 128: Rod-shaped rib 130: Discharge valve 130a: Sealing surface 131: Vent hole 132: Valve body 137: Valve fixing projection 138: Rod-shaped rib 150: Intake chamber 160: Diaphragm chamber 170: Discharge chamber

Claims (10)

[Claims] 1. A valve structure having a thin plate-shaped valve body having a plurality of ventilation holes and a sealing surface for opening and closing the ventilation holes, wherein the valve body is substantially located at a position substantially located at a center line. A valve structure characterized in that the valve body is fixed as a linear valve fixed shaft, and the valve body is deformed in a flapping shape with the valve fixed shaft as a base line, whereby the vent hole is opened and closed by the valve body. 2. A valve structure having a thin plate-shaped valve body having a plurality of ventilation holes and a sealing surface for opening and closing the ventilation holes, wherein the valve body has a thin long plate shape, and has a longitudinal direction. Is fixed as a substantially straight valve fixed shaft at a position located at a substantially center line along the valve body, wherein the vent has a portion arranged along both sides of the valve fixed shaft, 2. The valve structure according to claim 1, wherein the vent hole is opened and closed by a valve body by deforming in a flapping shape with the valve fixed shaft as a base line. 3. 3. The valve structure according to claim 1, wherein a plurality of valve fixing protrusions for fixing as a valve fixing shaft are arranged at a position located substantially at a center line of the valve body. . 4. The valve structure according to claim 1, wherein a fixing member for fixing the valve body as a valve fixing shaft is further mounted at a position located substantially at the center line of the valve body. 5. The valve structure according to claim 1, wherein the plurality of valve fixing projections are connected to the valve body via protruding rod-shaped ribs. 6. An electromagnet case having a housing shape, a pair of electromagnets arranged to face each other in the electromagnet case, and interposed between opposing surfaces of the pair of electromagnets, with a change in polarity of the electromagnets, A vibrator that reciprocates in a direction perpendicular to the opposing direction of the electromagnet, a pair of elastic diaphragms disposed so as to face both ends of the vibrator, and a plurality of ventilation holes separated by the diaphragm. A valve case body having a thin-plate-shaped valve body having a sealing surface for opening and closing the vent hole, and a valve case body having a discharge valve, wherein the valve case body has a valve function. The valve bodies of the suction valve and the discharge valve, which are fixed to have, are respectively fixed as substantially linear valve fixed shafts at positions located substantially at the center line, and the valve fixed shaft is used as a base line for the blades. Electromagnetic diaphragm pump, characterized in that the valve body waterfall-like opening and closing of the vent hole by the valve body is made by deforming. 7. The valve body has a thin and long plate shape, and is fixed as a substantially straight valve fixing shaft at a position located at a substantially center line along a longitudinal direction. 7. The valve body according to claim 6, wherein the valve body has portions arranged along both sides of the shaft, and the valve body is opened and closed by the valve body by deforming in a flapping shape with the valve fixed shaft as a base line. The described electromagnetic diaphragm pump. 8. The electromagnetic type according to claim 6, wherein a plurality of valve fixing projections for fixing as a valve fixing shaft are arranged at a position located substantially at the center line of the valve body. Diaphragm pump. 9. The electromagnetic diaphragm pump according to claim 6, wherein a fixing member for fixing as a valve fixing shaft is further mounted at a position located substantially at a center line of the valve main body. 10. The electromagnetic diaphragm pump according to claim 6, wherein the plurality of valve fixing projections are connected to the valve body via protruding rod-shaped ribs.