JP3870356B2 - Diaphragm pump - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a pump using a diaphragm as a small pump.
[0002]
[Prior art]
FIG. 5 is a view showing an example of a conventional diaphragm pump, where 1 is a driving motor, 2 is a motor output shaft, 3 is a crank base fixed to the output shaft 2, and 4 is inclined with respect to the crank base 3. The attached drive shaft 5 is a disk-like drive body rotatably attached to the drive shaft 4, and 6 A and 6 B are a plurality of pistons arranged at equal intervals around the drive body 5. A plurality of pump chambers arranged along the circumference (the illustrated pump is an example of a pump consisting of only two pump chambers 7A and 7B, and both pump chambers 7A and 7B are located at opposite positions 180 ° apart on the same circumference. It is possible to move back and forth. Reference numeral 8 denotes a diaphragm for connecting the pump chambers 7A and 7B and the piston 6 so that the pump chambers 7A and 7B are kept airtight. Reference numeral 9 denotes a suction port communicating with the pump chamber 7A via a check valve 11. Ports and 10 are discharge ports that communicate with the pump chamber 7B via the check valve 15.
[0003]
Further, 11, 12, 14, and 15 are all check valves, and 13 is a passage connecting one pump chamber 7A and another pump chamber 7B. In this pump, the diaphragm 8 is integrally formed with the pistons 6A and 6B, the pistons 6A and 6B are integrally connected by the diaphragm 8, and the peripheral portion 8c of the diaphragm forms the pump chambers 7A and 7B and the crank. It is fixed by being sandwiched by a case 17 that accommodates a drive mechanism portion including the base 3, the drive shaft 4, the drive body 5, and the like.
[0004]
In this conventional diaphragm pump, the crank base 3 is rotated by the rotation of the output shaft 2 by the motor 1, and the drive body 5 is moved as indicated by the arrow while the inclination is changed by the movement of the drive shaft 4 thereby. By the movement of the driving body 5, the left and right pistons 6A and 6B move up and down alternately to perform a pumping action. That is, when the piston 6A moves downward, the volume of the pump chamber 7A increases, and the fluid flows through the intake port 9 from the outside, opens the valve 11 and flows. At this time, the valve 12 is closed. At the same time, the piston 6B rises and the volume of the pump chamber 7B decreases, so that the fluid in the pump chamber 7B opens the valve 15 and is discharged out of the pump through the discharge port 10. At this time, the valve 14 is closed. Subsequently, the piston 6A is raised and the piston 6B is lowered. As a result, the volume of the pump chamber 7A decreases and the volume of the pump chamber 7B increases. Thereby, the fluid in the pump chamber 7A opens the valve 12, passes through the passage 13, and is sent in the direction of the pump chamber 7B. At the same time, the valve 14 is opened by the action of the piston 6B, and the fluid enters the pump 7B from the passage 13. Further, due to the movement of the driving body 5, the piston 6A is lowered, the piston 6B is raised, the pump chamber 7A sucks fluid from the suction port 9, and the fluid is discharged from the pump chamber 7B from the discharge port 10.
[0005]
In this manner, the conventional diaphragm pump shown in FIG. 5 draws fluid from the suction port 9 by the up and down movement of the pistons 6A and 6B caused by the movement of the driving body 5, and flows it into the pump chamber 7A. The fluid that has flowed into the pump chamber 7A flows into the pump chamber 7B through the passage 13, and the fluid that has flowed into the pump chamber 7B is discharged from the discharge port 10.
[0006]
The pump shown in FIG. 5 has a suction port 9 connected to a tank or the like, and air, other gases or other fluids inside the tank or the like are sucked into the pump through the suction port 9 and the pressure inside the tank or the like is increased. Used to decrease.
[0007]
That is, by the operation of the above-described pump, the fluid in the tank or the like flows into the pump chamber 7A through the suction port 9, is further sent to the pump chamber 7B through the fluid in the pump chamber 7A and the passage 13, and is further discharged from the pump chamber 7B. It discharges outside through the outlet 10. In this way, the pressure of the fluid inside the tank or the like is reduced by discharging the fluid inside the tank or the like to the outside.
[0008]
The pump shown in FIG. 5 is a pump composed of two pump chambers, pump chambers 7A and 7B, but can also be constituted by three or more pumps as described above. That is, three or more pumps are arranged at equal intervals along the circumference, one of the first pump chambers is connected to the suction port, and the other second pump chamber adjacent thereto is connected to the check valve. The third, fourth,... Pump chambers are sequentially connected in the same manner, and the last pump chamber is connected to the discharge port.
[0009]
Thus, the pump having three or more pump chambers causes fluid to flow into the first pump chamber through the suction port by the movement of the piston by the same drive mechanism as shown in FIG. 5, and sequentially from the first pump chamber. It sends to the 2nd, 3rd ... pump chamber, and sends it through the discharge port from the last pump chamber.
[0010]
As described above, the pump composed of the two pump chambers shown in FIG. 5 or the pump composed of a plurality of pump chambers of the same principle is a serial type pump that sequentially sends the fluid through each pump chamber.
[0011]
Such a series diaphragm pump composed of three or more pump chambers is connected to a tank containing air, gas or other fluid in the inlet, similarly to the above-described diaphragm pump composed of two pump chambers, The fluid in the tank is sucked from the suction port by the operation of the pump and sent to the first pump chamber, and then sequentially sent to the second, third,... Pump chambers, and the discharge port from the last pump chamber connected to the discharge port. Through the pump. This is used to reduce the pressure of the fluid in the tank.
[0012]
Such a series-type diaphragm pump, for example, flows the fluid into the first pump chamber from the suction port, sequentially sends the fluid through the second, third,... It is also used to increase the pressure by pressurization and to make the highest pressure in the last pump chamber connected to the discharge port, for example, to send a high-pressure fluid such as high-pressure air into a tank or the like. That is, it is also used for pressure increase.
[0013]
An example of a pump composed of two pump chambers among the series diaphragm pumps designed for pressure increase is as shown in FIG.
[0014]
The pump shown in FIG. 6 has substantially the same configuration as the pump shown in FIG. 5, but the shape of the thin portions 8a and 8b of the diaphragm 8 constituting the pump chambers 7A and 7B is different from the pump shown in FIG.
[0015]
That is, in the pumps shown in FIGS. 5 and 6, the thin-walled portion can move the piston, and the shape can be smoothly changed by this movement, and the change can be sufficiently tolerated at high pressure or low pressure. U-shaped to get. However, in the case of pressure reduction shown in FIG. 5, the pressure in the pump chamber becomes low on the contrary, and when considering that the entire diaphragm is prevented from being deformed by the suction force, the thin wall portion is preferably an inverted U-shape. Thus, FIG. 5 is inverted U-shaped while FIG. 6 is U-shaped.
[0016]
[Problems to be solved by the invention]
As described above, in general, a diaphragm pump has a U-shaped thin wall that is deformed by the movement of a piston as shown in FIGS. 5 and 6 and is thin even if the pressure in the pump chamber is higher or lower than the outside air. The parts are deformed without difficulty so that the pumping action can be performed smoothly and not be damaged.
[0017]
As described above, when a series diaphragm pump is used for pressure reduction, the pressure in the pump chamber connected to the suction port becomes small, and the pressure becomes smaller than the pressure in the pump chamber connected to the discharge port. In addition, the pressure in the pump chamber connected to the discharge port is discharged to the outside directly through the discharge port, so that the pressure is close to the pressure of the external fluid.
[0018]
For example, when reducing the pressure in the tank by reducing the pressure in the tank as described above, the suction port is connected to the tank, and the air in the tank is first sucked into the pump chamber connected to the suction port. Then, it passes through the pump chamber and is discharged to the outside from the pump chamber connected to the discharge port. Therefore, the pressure in the pump chamber connected to the suction port gradually decreases, but the pump chamber connected to the discharge port becomes a pressure close to the outside.
[0019]
When the pressure is increased with a series diaphragm pump, the pressure in the pump chamber connected to the discharge port is increased to a pressure higher than that of the pump chamber connected to the suction port. In addition, since an external fluid such as outside air flows directly into the pump chamber connected to the suction port and is sent to the next pump chamber, the pressure in the pump chamber is close to the pressure of the external fluid. Since this fluid is sequentially pressurized and then sent, the pressure in the pump chamber connected to the last outlet is highest.
[0020]
Thus, the pressure in the pump chamber connected to the discharge port is higher than the pressure in the pump chamber connected to the suction port. Moreover, as described above, the pressure in the pump chamber connected to the suction port is almost the same as the pressure of the external fluid.
[0021]
In this way, when the series diaphragm pump is used for pressure increase, the pressure of the pump chamber connected to the suction port is smaller than that of other pump chambers, and is almost equal to the external pressure. When used for pressure reduction, the pressure in the pump chamber connected to the discharge port is large, and the pressure is almost equal to the external pressure.
[0022]
As described above, the serial diaphragm pump has a large pressure difference between the pump chamber connected to the suction port and the pump chamber connected to the discharge port, regardless of whether it is used for pressure increase or pressure reduction.
[0023]
Therefore, if the pump chamber with such a large pressure difference is the same shape in a series-type diaphragm pump, it is extremely higher than the external fluid, even if it has a shape that is strong against the pressure of the external fluid. Even if the shape is strong against pressure or low pressure, there is a problem in durability and the like.
[0024]
The present invention provides a diaphragm pump that eliminates the above-mentioned drawbacks of the series diaphragm pump and prevents the diaphragm portion, particularly the thin portion, from being damaged even if a pressure difference occurs in the pump chamber. .
[0025]
[Means for Solving the Problems]
The diaphragm pump of the present invention includes a plurality of pump chambers including a pump chamber connected to the suction port and a pump chamber connected to the discharge port, and in the case of two pump chambers, the pump chamber connected to the suction port and the pump chamber If the pump chamber connected to the discharge port is connected by a flow path or a room, or if there is a pump chamber in addition to both pump chambers, from the pump chamber connecting both pump chambers and the other pump chamber between them to the suction port Connect to the pump chamber connected to the discharge port sequentially in the flow path or room, and draw the fluid from the suction port by the movement of the piston provided in each pump chamber and connect it to the discharge port from the pump chamber connected to the suction port It is a series type pump that is directly or sequentially sent to the pump chamber through each pump chamber and is discharged through the discharge port from the pump chamber connected to the discharge port. The volume of each pump chamber is increased by the movement of the piston. A pump that includes a thin portion and supports a piston so as to be able to reciprocate so as to be easily deformable so that it can be pumped and to be connected to at least a pump chamber connected to an intake port and a discharge port The thin wall portion of the chamber has a different shape.
[0026]
That is, the diaphragm pump of the present invention is a series type diaphragm pump composed of two pump chambers or three or more pump chambers, that is, a plurality of pump chambers, and is used for pressure reduction or pressure increase. It is characterized in that the shape of the thin portion of the formed pump chamber is different from each other so as to be the most desirable shape with respect to the average pressure of each pump chamber during pump operation.
[0027]
In particular, in a series diaphragm pump as in the present invention, when designed for pressure reduction, the pressure in each pump chamber during pump operation is the lowest in the pump chamber connected to the suction port, and is connected to the discharge port. The pump room is relatively high and the highest among the pump rooms. When designed for pressure increase, the pressure in the pump chamber connected to the suction port is relatively low and the pressure in the pump chamber connected to the discharge port is the highest. In any case, the pressure difference between the pump chamber connected to the suction port and the pump chamber connected to the discharge port is the largest. Therefore, it is desirable that at least the shape of the thin portion of the pump chamber connected to the suction port is different from the shape of the thin portion of the pump chamber connected to the discharge port. And it is preferable to make the shape of the thin part of both said pump chambers into the most desirable shape at the time of pump operation.
[0028]
Here, each of the two pump chambers for pressure reduction and pressure increase will be described. Similarly, each of the three pump chambers having three or more pump chambers for pressure reduction and pressure increase will be described.
[0029]
First, the diaphragm pump of the present invention comprising two pump chambers has the following configuration.
[0030]
In other words, the first pump chamber connected to the suction port and the other pump chamber (last pump chamber) connected to the discharge port, and both pump chambers are connected by a flow path or a room, both pumps Due to the movement of the pistons provided in the chambers, a fluid such as a tank or a fluid outside the pump flows into the first pump chamber from the suction port, and further the fluid is sent from the first pump chamber to the other pump chambers through the flow path. Or, after increasing the pressure, it is discharged out of the pump from the other last pump chamber through the discharge port or sent to the tank or the like, and the shape of the thin portion of the first pump chamber and the shape of the other last thin portion The feature is that they are different.
[0031]
As a configuration when the pump of the present invention comprising the two pump chambers is used for pressure reduction, the shape of the thin wall portion of the first pump chamber that is low in pressure is an inverted U-shape that is strong against extremely low pressure. It is most desirable to make the shape of the thin portion of the last pump, which is a pump chamber connected to the discharge port communicating with the outside, into a flat shape that is the strongest with respect to the pressure close to the pressure of the external fluid. However, the shape of the thin wall portion of the last pump chamber may not be flat (cross-sectional straight line) but may be a curved surface (cross-sectional curve) with a gentle curvature.
[0032]
In the case of a pump used for pressure increase, the most desirable shape of the thin portion of the first pump chamber and the last pump chamber is that the first pump chamber is flat and the last pump chamber is U-shaped. It is. However, the first pump chamber may be a flat shape or a shape close thereto, and may be a loose curve even if the cross-sectional shape is not a straight line.
[0033]
Next, the diaphragm pump of the present invention comprising three or more pump chambers includes a first pump chamber connected to the suction port, a second pump chamber connected to the first pump chamber by a flow path or a chamber, and a second pump chamber. A third pump chamber (in the case of three pump chambers), which is the last pump chamber connected to the pump chamber and the flow path or the chamber and connected to the discharge port (in the case of three pump chambers), or the first pump chamber connected to the suction port A second pump chamber, a third pump chamber, and a last pump chamber, which are sequentially connected to the first pump chamber in the flow path or the room, and at least the first pump chamber (a pump connected to the suction port) The thin wall portion of the chamber) and the last pump chamber (the pump chamber connected to the discharge port) have different shapes.
[0034]
In the pump composed of these three pump chambers and designed for pressure reduction, the thin portion of the diaphragm portion of the first pump chamber has an inverted U shape, and the thin portion of the diaphragm portion of the last pump chamber is flat or loose. It is desirable to have a curved surface.
[0035]
If comprised as mentioned above, the diaphragm which comprises each pump chamber will be rich in durability similarly to the diaphragm pump which consists of two pump chambers.
[0036]
Further, in the case of a diaphragm pump comprising three or more pump chambers, the shape of the thin wall portion of the diaphragm chamber of the pump chamber between the first pump chamber and the last pump chamber is U-shaped or flat for pressure increase. Either of these may be used. Also, the first pump chamber may be a flat surface or a curved surface with a gentle curvature, and the second, third,... .
[0037]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of an in-line diaphragm pump comprising two pump chambers of the diaphragm pump of the present invention will be described.
[0038]
FIG. 1 shows the overall configuration of the diaphragm pump of the present invention, and FIG. 2 is a diagram showing the main part thereof. The diaphragm (diaphragm part and piston) in the pump in which two pumps (diaphragm parts) shown in FIG. 5 are connected in series. Is shown.
[0039]
The diaphragm pump of this embodiment has the same configuration as that shown in FIG. 5, 6A and 6B are pistons, 7A and 7B are pump chambers, 8 is a diaphragm, 9 is a suction port, 10 is a discharge port, 11 , 12, 14 and 15 are check valves, and 13 is a passage.
[0040]
Among them, as shown in FIG. 2 (B), the diaphragm 8 has the same structure (thin wall portion) as that of the conventional example as shown in FIG. 5 in the structure of the diaphragm portion and the piston 6A constituting the first pump chamber 7A. 8a is an inverted U-shape), but the second pump chamber 7B has a flat shape with a thin portion 8b deformed by the reciprocating motion of the piston 6B, as shown in the sectional view of FIG. It is characterized by doing.
[0041]
Thus, in the diaphragm pump of this embodiment, the shape of the thin portion 8a or 8b of the diaphragm 8 constituting the pump chamber 7A connected to the suction port 9 and the pump chamber 7B connected to the discharge port 10 is different. It is characterized by that.
[0042]
This pump is used for decompression, and therefore the pressure in the pump chamber 7B connected to the discharge port 10 is higher than that in the pump chamber 7A connected to the suction port 9. That is, the suction port 9 is connected to a tank or the like, and is sucked into the pump chamber 7A from the tank or the like by a pump action. After the pressure is reduced, the fluid is sent to the pump chamber 7B and discharged from the discharge port. Therefore, the pressure in the pump chamber 7A is lower than that in the pump chamber 7B, and the pump chamber 7B is close to the external pressure because it is connected to the outside.
[0043]
Accordingly, the pump chamber 7A has a thin wall portion 8a having an inverted U-shaped cross section that is suitable for a pump chamber in which the pressure decreases, and the other pump chamber 7B has a pressure that is substantially the same as the external pressure. It has a relatively flat thin part that is suitable. That is, although it is shown in FIGS. 1 and 2 in a flat shape (cross section is a straight line), it may be a loosely curved shape (a cross section having a gentle curvature).
[0044]
With this configuration, cracks do not occur even at pressures close to external pressure, such as a pump chamber connected to the discharge port, and the pump chamber connected to the suction port has a shape suitable for a decompressed state. Therefore, both pump chambers perform optimal exercise and are durable.
[0045]
In the pump shown in FIG. 1, the pump chamber 7A and the pump chamber 7B are communicated with each other through a passage 13, but instead of such a passage, a room having a wide space is formed, and the pump chamber 7A, the pump chamber 7B, There should be a portion where the fluid flows between them. Then, both pump chambers may be communicated with each other through a passage or the room, and a check valve may be provided at the boundary between the chamber and the pump chambers 7A and 7B. Further, the check valve may be only one of the pump chamber 7A side and the pump chamber 7B side. Similarly, in the pump of FIG. 1 configured to connect the two pump chambers in the passage, one of the check valves may be used without using the check valve 12 or the check valve 14.
[0046]
In this embodiment, in the case of a series diaphragm pump composed of three or more pump chambers instead of two pump chambers, the pump chamber connected to the suction port is similar to the pump chamber on the left side of FIG. If the pump chamber connected to the discharge port is shaped like the pump chamber on the right side of FIG. 2 (B), the other pump chambers may be either thin U-shaped or flat. Any shape having a loose curved surface may be used.
[0047]
Further, in the case of a pump composed of three or more pump chambers, the pump chamber connected to the suction port has an inverted U shape, and subsequently the degree of bending gradually decreases, and the thin wall portion of the pump chamber connected to the discharge port is the most. It may be a loosely curved shape or a flat shape.
[0048]
FIG. 3 is a diagram showing another second embodiment. This embodiment is an example in which the present invention is applied to a diaphragm designed for pressure increase by a series diaphragm pump composed of two pump chambers. That is, this is an embodiment in which the present invention is applied to the conventional diaphragm pump shown in FIG.
[0049]
In this embodiment, the diaphragm thin portion 8a of the pump chamber 7A and the diaphragm thin portion 8b of the pump chamber 7B have different shapes as in the first embodiment. However, unlike the first embodiment, the shape of the thin portion is such that the pump chamber 7A connected to the suction port is flat and the pump chamber 7B connected to the discharge port is U-shaped.
[0050]
The diaphragm pump used for pressure increase as shown in FIG. 6 is such that the pump chamber 7A connected to the suction port is at a pressure relatively close to the pressure of the external fluid, so that the thin portion 8a of the diaphragm 8 is flat. The pump chamber 7B connected to the discharge port is connected to a tank or the like, and the shape of the thin portion 8b of the diaphragm 8 is U-shaped in order to increase the pressure inside the pump chamber 7B. .
[0051]
Also in this embodiment, the thin-walled portion of the diaphragm of the pump chamber 7A may be a loose curve instead of a flat shape.
[0052]
In the case of a series diaphragm pump for increasing pressure as in the second embodiment, in the case of a pump comprising three or more pump chambers, the shape of the thin portion of the pump chamber connected to the suction port is shown in FIG. The shape of the thin wall portion of the pump chamber between the two pump chambers may be U-shaped or flat as long as the pump chamber 7A has the same shape as the thin wall portion of the pump chamber 7B connected to the discharge port.
[0053]
In the case of an in-line diaphragm pump consisting of three or more pump chambers for pressure increase, the pump chamber connected to the suction port is a flat or loose curved surface like the pump chamber 7A of FIG. 3, and the curvature gradually increases. It is more preferable if the pump chamber connected to the discharge port is made U-shaped with a U-shape.
[0054]
According to the first and second embodiments described above, even if it is a series pump, any pump chamber can be a diaphragm pump with excellent durability without fear of breakage or the like.
[0055]
Although the embodiment of the diaphragm pump of the present invention has been described above, a diaphragm pump having the following configuration different from the above configuration can also achieve the object of the present invention.
[0056]
In other words, each pump chamber has the same shape and is connected to at least the pump chamber connected to the suction port and the discharge port. The pump chamber is a pump chamber having a different diameter of the pump chamber, or a pump chamber having a different piston diameter.
[0057]
FIG. 4 shows a diaphragm pump in which the pump chamber connected to the suction port and the pump chamber connected to the discharge port have different pump chamber diameters or piston diameters to achieve the object of the present invention. .
[0058]
In FIG. 4, (A) shows a diaphragm (pump chamber) and a piston part of an in-line diaphragm pump comprising two decompression pump chambers. The left pump chamber has a piston diameter of x1, the pump chamber The diameter is x2, and the right pump chamber has a piston diameter y1 and a pump chamber diameter y2.
[0059]
In FIG. 4A, the left pump chamber is connected to the suction port, the right pump chamber is connected to the discharge port, and a flow path is further provided from the tank or the like to the left pump chamber through the suction port. It is sent to the pump chamber on the right side through which the pressure is reduced in these pump chambers and supplied to the tank or the like from the discharge port. That is, the pressure in the pump chamber connected to the right outlet is higher than the pressure in the pump chamber connected to the left inlet, and the pressure in the pump chamber connected to the inlet is at least much lower than the external pressure. The pressure in the pump chamber connected to the outlet is close to the external pressure.
[0060]
In this case, for decompression, the configuration as shown in FIG. 4A is used, and the diameter x1 of the pump chamber connected to the left suction port is made small, but the diameters y1 and y2 of the piston are made equal. That is, x1 <x2 and y1 = y2.
[0061]
As a result, a crack or the like does not occur, and the pump can be made good and durable.
[0062]
Further, the left pump chamber diameter x1 and the right pump chamber diameter x2 are made equal to x1 = x2, and the left pump chamber piston diameter y1 is made larger than the right pump chamber piston diameter y2. Y1> y2 may be satisfied. That is, x1 = x2, y1> y2 may be satisfied.
[0063]
Further, in the case of a decompression pump composed of three or more pump chambers, x1 <x2 <. Further, x1 <xn, y1 = y2 =... = Yn, and x2, x3... May be an appropriate value between x1 and xn and the same value. Alternatively, x1 = x2 =... = Xn, y1> yn, and y2, y3,... May be appropriate values between y1 and yn and all may be equal.
[0064]
In addition, in the case of three or more pump chambers in the pressure increasing type pump composed of the diaphragm or piston of FIG. 4B, x1>x2>x3>...> Xn and y1 = y2 = y3 =. Or x1 = x2 = x3 = ... = xn and y1 <y2 <y3 <... <yn.
[0065]
Also, x1> xn, y1 = y2 =... = Yn, and x2, x3,... Are appropriately equal between x1 and xn, or x1 = x2 = ... = xn and y1 <Yn and y2, y3,... May be appropriately equal between y1 and yn.
[0066]
Further, when this pump is used for pressure increase, the left pump chamber is connected to the outside through the suction port and the right pump chamber is connected to the tank or the like through the discharge port in the configuration as shown in FIG. Then, x1> x2 and y1 = y2 or x1 = x2 and y1 <y2 may be satisfied.
[0067]
In this diaphragm pump, the thin-walled portion remains in a U-shaped cross section suitable for a pressure higher or lower than an external pressure such as an external pressure, and by changing the diameter of the diaphragm portion (pump chamber), Alternatively, by changing the diameter of the piston, cracks do not occur even in a pump chamber having a pressure almost equal to an external pressure such as an external pressure, and thus a diaphragm pump having excellent durability can be obtained.
[0068]
In the pump described above, the pump chamber or the piston whose diameter is changed is the same as that shown in FIG. 1 in the case of the pressure reducing type, and in the case of the pressure increasing type, the configuration shown in FIG. The same.
[0069]
Also in these pumps, the connection between the pump chamber and the pump chamber is not necessarily a passage, that is, an elongated fluid passage, and may be a space (room) that is in contact with both pump chambers. In addition, a check valve provided in a portion where the passage or the room and each pump chamber are in contact may be provided in each pump chamber, but may be provided in either one of the two pump chambers.
[0070]
【The invention's effect】
In the diaphragm pump of the present invention, the thin-walled portion of the diaphragm portion constituting the pump chamber is formed in a different shape, or the diameter of the pump chamber or the diameter of the piston is made different so that a pressure difference is generated in each pump chamber. The diaphragm pump also has an effect that the pump chamber (diaphragm portion) can be made into a durable pump that is not easily cracked.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of an embodiment of a diaphragm pump of the present invention.
FIG. 2 is a diagram showing a configuration of a diaphragm part which is a main part of the diaphragm pump shown in FIG.
FIG. 3 is a diagram showing a configuration of another second embodiment of the diaphragm pump of the present invention.
FIG. 4 is a diagram for explaining another diaphragm pump that achieves the object of the present invention;
FIG. 5 is a diagram showing the configuration of a conventional series diaphragm pump
FIG. 6 is a diagram showing another configuration of a conventional in-line diaphragm pump
[Explanation of symbols]
6A, 6B piston
7A, 7B Pump room
8 Diaphragm
8a, 8b Thin section
9 Inlet
10 Discharge port

Claims (4)

    A plurality of pump chambers including a pump chamber connected to the suction port and a pump chamber connected to the discharge port; in the case of two pump chambers, a pump chamber connected to the suction port and a pump chamber connected to the discharge port In the flow path or the room, or in the case of having a pump chamber in addition to the two pump chambers, the pump chamber connecting the two pump chambers and the other pump chamber therebetween to the discharge port from the pump chamber connecting to the suction port Are connected to the pump chamber connected to the discharge port from the pump chamber connected to the suction port through the suction of the fluid by the movement of the piston provided in each pump chamber. It is a series type pump that is sent through the pump chamber and discharged through the discharge port from the pump chamber connected to the discharge port. Each pump chamber can change its volume due to the movement of the piston and perform pumping action. A pump that includes a thin part so that it can be easily deformed and has a diaphragm that supports the piston so as to be able to reciprocate. The thin part of the pump chamber connected to the suction port has an inverted U-shape and is connected to the discharge port. A diaphragm pump characterized in that the thin-walled portions of the chambers are flat or loosely curved, and the thin-walled portions of both pump chambers have different shapes.     A plurality of pump chambers including a pump chamber connected to the suction port and a pump chamber connected to the discharge port; in the case of two pump chambers, a pump chamber connected to the suction port and a pump chamber connected to the discharge port In the flow path or the room, or in the case of having a pump chamber in addition to the two pump chambers, the pump chamber connecting the two pump chambers and the other pump chamber therebetween to the discharge port from the pump chamber connecting to the suction port Are connected to the pump chamber connected to the discharge port from the pump chamber connected to the suction port through the suction of the fluid by the movement of the piston provided in each pump chamber. It is a series type pump that is sent through the pump chamber and discharged through the discharge port from the pump chamber connected to the discharge port. Each pump chamber can change its volume due to the movement of the piston and perform pumping action A pump that has a thin wall part so that it can be easily deformed and has a diaphragm that supports the piston so that it can reciprocate. A diaphragm pump characterized in that the thin wall portion of the chamber is U-shaped and the thin wall portions of the two pump chambers have different shapes.     A plurality of pump chambers including a pump chamber connected to the suction port and a pump chamber connected to the discharge port; in the case of two pump chambers, a pump chamber connected to the suction port and a pump chamber connected to the discharge port In the flow path or the room, or in the case of having a pump chamber in addition to the two pump chambers, the pump chamber connecting the two pump chambers and the other pump chamber therebetween to the discharge port from the pump chamber connecting to the suction port Are connected to the pump chamber connected to the discharge port from the pump chamber connected to the suction port through the suction of the fluid by the movement of the piston provided in each pump chamber. It is a series type pump that is sent through the pump chamber and discharged through the discharge port from the pump chamber connected to the discharge port. Each pump chamber can change its volume due to the movement of the piston and perform pumping action. It has a thin part that includes a thin part so that it can be easily deformed, and has a diaphragm that supports the piston so that it can reciprocate. The diameter of the pump chamber connected to the suction port is made smaller than the diameter of the pump chamber connected to the discharge port, and the diameters of the pistons of both the pump chambers are equal or the diameter of the piston of the pump chamber connected to the suction port is A diaphragm pump characterized in that it is larger than the diameter of the piston of the pump chamber connected to the discharge port, the diameters of the two pump chambers are made equal, and the thin wall portions of both pump chambers have different shapes.     A plurality of pump chambers including a pump chamber connected to the suction port and a pump chamber connected to the discharge port; in the case of two pump chambers, a pump chamber connected to the suction port and a pump chamber connected to the discharge port In the flow path or the room, or in the case of having a pump chamber in addition to the two pump chambers, the pump chamber connecting the two pump chambers and the other pump chamber therebetween to the discharge port from the pump chamber connecting to the suction port Are connected to the pump chamber connected to the discharge port from the pump chamber connected to the suction port through the suction of the fluid by the movement of the piston provided in each pump chamber. It is a series type pump that is sent through the pump chamber and discharged through the discharge port from the pump chamber connected to the discharge port. Each pump chamber can change its volume due to the movement of the piston and perform pumping action. The diaphragm includes a thin part so that it can be easily deformed, and has a diaphragm that reciprocally supports the piston. The thin part of the pump chamber connected to the suction port and the pump chamber connected to the discharge port are U-shaped. The diameter of the pump chamber connected to the suction port is made larger than the diameter of the pump chamber connected to the discharge port, and the diameters of the pistons of both pump chambers are made equal or the diameter of the piston of the pump chamber connected to the suction port is discharged. A diaphragm pump characterized in that the diameter of the pump chambers is made smaller than the diameter of the pump chamber connected to the outlet, and the diameters of the two pump chambers are made equal to make the thin wall portions of the two pump chambers different.

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