JPH0669370U - Reciprocating pump - Google Patents

Abstract

(57) [Summary] [Purpose] A single reciprocating drive source discharges fluids having different discharge amounts from a plurality of compression chambers. [Structure] 2 on the shaft 3 that vibrates with a single reciprocating drive source
The diaphragms are fixed, and the diaphragms 5 and 6 form part of the wall surfaces of the compression chambers 9 and 10. When the shaft 3 vibrates in the direction of arrow 4 by an electromagnetic circuit (not shown), fluid such as air is discharged from the discharge port 12 of the compression chamber 9 and the discharge port 21 of the compression chamber 10 at different discharge amounts. Similar effects can be obtained by providing a plurality of pistons having different diameters that slide and vibrate in the casing 2 instead of the diaphragms 5 and 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reciprocating pump, and more particularly to a reciprocating pump having a plurality of discharge ports.

[0002]

[Prior art]

 As a relatively small-sized compression pump, a movable body having a magnet or a magnetic body part is reciprocated in the compression chamber by the action of the attractive force of an electromagnetic circuit, so that the volume of the compression chamber is changed and a fluid such as air is moved. Some are configured to discharge and suck.

Further, a diaphragm is connected to the movable body, and by vibrating the diaphragm, the volume of the compression chamber having the diaphragm as one wall surface is changed to discharge and suck a fluid such as air. Things are also known.

An example of the former reciprocating pump is that described in Japanese Utility Model Publication No. 2-47268, and an example of the latter reciprocating pump is that described in JP-A-63-176680.

[0005]

[Problems to be solved by the device]

 The above reciprocating pump has the following technical problems to be solved. The fluid discharged from a reciprocating pump (hereinafter, simply referred to as a pump) may be supplied to and used at multiple locations. By the way, the supply amount of the fluid to each of the plurality of places of use is not necessarily the same. In other words, the amount of fluid required varies depending on the application.In the past, the amount of fluid was adjusted at the branch point after the discharge port or the compression chamber of the pump was adjusted to match the discharge amount so as to match each application. I am dealing with it by providing multiple.

Therefore, there are problems that the piping of the pump becomes complicated and that opening and closing adjustment operation by the valve for adjusting the fluid amount after the discharge port is troublesome.

An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a pump capable of obtaining various discharge amounts with a simple configuration.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems and achieve the object, the present invention is configured such that the volume of the compression chamber is changed by a reciprocating driving source, and has a suction port and a discharge port opened to the compression chamber. The reciprocating pump comprises a plurality of reciprocating bodies driven by a common reciprocating driving source, and a plurality of compression chambers formed by partitioning the casing by the plurality of reciprocating driving bodies. The area of the reciprocating body that forms the three wall surfaces of the compression chamber is determined so that at least one volume change amount of the plurality of compression chambers due to movement is different from the volume change amount of the other compression chambers. It is characterized by points.

[0009]

[Action]

 In the present invention having the above characteristics, the plurality of reciprocating bodies having different areas forming the wall surface of the compression chamber reciprocate, so that the volume of each compression chamber changes even when the reciprocating body reciprocates with the same stroke. Is different from the change in the volume of other compression chambers.

As a result, in one discharge stroke, different amounts of fluid are discharged from the discharge ports of each compression chamber.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of essential parts showing an embodiment of the present invention. In the figure, a shaft 3 is arranged on the center line of the casing 2 of the pump 1. The shaft 3 vibrates in the direction of arrow 4 by the action of an electromagnetic circuit (not shown) and a spring. A diaphragm 5 and a diaphragm 6 for partitioning the casing 2 to form the compression chambers 9 and 10 and changing the volume of the compression chambers 9 and 10 by the vibration of the shaft 3 are mounted on the shaft 3. It

Here, the diaphragm 5 and the diaphragm 6 have different amounts in which the volumes of the compression chambers 9 and 10 change due to the vibration of the diaphragms 5 and 6, that is, the discharge amounts from the compression chambers 9 and 10. As you can see, they have different diameters. As shown in the figure, the diaphragm 5 is set larger than the diaphragm 6.

The diaphragm 5 is fixed to the shaft 3 while being sandwiched by washers 5a and 5b from both sides, and the diaphragm 6 is sandwiched by washers 6a and 6b from both sides.

The peripheral edge of the diaphragm 5 is fixed by a groove formed on the inner surface of the casing 2 and an attachment ring 7, and the peripheral edge of the diaphragm 6 is formed by a groove formed on the inner surface of the casing 2 and an attachment ring 8. It is fixed at. Thus, the diaphragms 5 and 6 form part of the wall surface of the compression chamber 9, and the diaphragm 6 also forms part of the wall surface of the compression chamber 10.

A suction port 11 and a discharge port 12 are formed in the compression chamber 9, and a spring chamber 14 in which a compression coil spring 13 is housed is provided behind the suction port 11. An inlet port 15 is provided on one side of the spring chamber 14, that is, on the side facing the suction port 11. A suction valve 16 is provided at the inlet 15 and is biased in the valve closing direction by the compression coil spring 13.

On the other hand, behind the discharge port 12, a spring chamber 18 in which a compression coil spring 17 is housed is provided. A discharge valve 19 is arranged at the discharge port 12, and is biased in the valve closing direction by the compression coil spring 17.

The compression chamber 10 is also provided with an intake port 20 and a discharge port 21 similar to the compression chamber 9, and behind the intake port 20 is provided a spring chamber 23 containing a compression coil spring 22. An inlet 24 is provided on one side of the spring chamber 23, that is, on the side facing the suction port 20. A suction valve 25 is arranged at the inlet 24, and is biased in the valve closing direction by the compression coil spring 22.

A spring chamber 27, in which a compression coil spring 26 is housed, is provided behind the discharge port 21. A discharge valve 28 is arranged at the discharge port 21 and is biased by the compression coil spring 26 in the valve closing direction.

With the above configuration, when the shaft 3 is urged and vibrated by the attraction force of the electromagnetic circuit and the repulsive force of the spring, the diaphragms 5 and 6 also vibrate in the arrow 4 direction. The vibration of the diaphragm 5 reduces the pressure in the compression chamber, exceeds the load of the compression coil spring 13, opens the suction valve 16, and the air introduced from the inlet port 15 is sucked into the compression chamber 9 through the suction port 11. When the pressure of the compression chamber 9 exceeds the load of the compression coil spring 17 in the compression stroke of the compression chamber 9 due to the vibration of the diaphragm 5, the intake valve 19 moves backward to open the discharge port 12. It is discharged outside the pump 1.

Similarly, the air introduced from the suction port 20 into the compression chamber 10 by the vibration of the diaphragm 6 is compressed and discharged from the discharge port 21.

Here, the diaphragms 5 and 6 vibrate with the same amplitude because they are connected to the common shaft 3. However, since the diameters of the diaphragms 5 and 6 are different from each other, the air discharged from the compression chambers 9 and 10 in a unit time respectively. You can make a difference in quantity. That is, a larger amount of air is discharged from the compression chamber 9 than that from the compression chamber 10.

Since the diaphragms 5 and 6 form the wall surface in the compression chamber 9, the difference between the volume changed by the vibration of the diaphragm 5 and the volume changed by the vibration of the diaphragm 6 is different from that of the diaphragms 5 and 6. The change in volume of the entire compression chamber 9 changes due to the vibration.

In the above-described embodiment, an example in which a part of the wall surfaces of the compression chambers 9 and 10 is composed of the diaphragms 5 and 6 is shown. Instead of the diaphragms, a piston is attached to the shaft 3 and the piston reciprocates. The volumes of the compression chambers 9 and 10 may be changed by moving them so that air is sucked in and discharged.

FIG. 2 is a sectional view of a main part of a pump showing an example in which a piston is arranged in place of the diaphragm 6 having the small diameter, and the same reference numerals as those in FIG. 1 indicate the same or equivalent parts.

In the figure, a piston 29 is attached to the tip of the shaft 3. A piston ring 30 is fitted on the outer periphery of the piston 29 near the tip thereof. In the compression chamber 10a having the head of the piston 29 as a part of the wall surface, as in the compression chamber 10 having the diaphragm 6 as a part of the wall surface, the vibration of the piston 29 causes air to pass through the suction port 20. The air is sucked, compressed, and discharged from the discharge port 21 to the outside of the pump 1.

As described above, also in the pump of the second embodiment shown in FIG. 2, the fluid passages of two systems are formed, and the shaft 3 vibrated by the single reciprocating drive source causes the two systems to be operated. It is possible to eject different amounts of air from the fluid flow path.

Therefore, a separate device that requires different amounts of air is provided between the pump 1 and the equipment or place where the compressed air obtained by the pump 1 is used, without providing other equipment such as a regulating valve. A desired amount of air can be supplied to a device or the like.

In the above-described embodiment, the case where the inner diameters of the compression chambers 9 and 10 are different from each other has been described. However, the inner diameters of the compression chambers may not necessarily be different and may be as follows. FIG. 3 is a view showing a modified example of the pump shown in FIG. 1, and is a view schematically showing a cross section of a main part of the pump. In the figure, the same reference numerals as those in FIG. 1 indicate the same or equivalent parts.

In FIG. 3, the compression chambers 9 and 10 formed in the casing 2 are partitioned by a partition wall 37, to which the periphery of the diaphragm 6 is fixed, as one wall surface. Further, the other wall surface of the compression chamber 9 is formed by the diaphragm 5.

In this pump 1, the diaphragm 5 is larger than the diaphragm 6 in order to provide a difference in the areas of the diaphragms 5 and 6 for changing the volumes of the compression chambers 9 and 10 by vibration. The inner diameters of the chambers 9 and 10 themselves are the same. With such a shape, the shape of the entire pump can be simplified.

In this embodiment, the case where the number of compression chambers is two is shown, but if the compression chambers having the configuration shown in FIG. 1, FIG. 2 or FIG. It is possible to form fluid channels of four systems.

Further, the wall surface of the compression chamber may be constituted by not only the combination of the diaphragms and the combination of the diaphragm and the piston as in the present embodiment but also the combination of the pistons.

Next, an application example of the above-mentioned pump will be described. FIG. 4 is a sectional view of a main part of a septic tank showing an application example of the pump according to the present invention. In the figure, the septic tank 31 is divided into a plurality of tanks by a partition plate 32. In the settling tank 33, sewage that has flowed in from an unillustrated first-stage settling tank, which is provided in the preceding stage of the settling tank 33, is retained. Sewage is settled in the settling tank 33 and the first-stage settling tank. Bacteria or soil containing bacteria is put into the settling tank, and sludge is produced by acting the bacteria on sewage to accelerate the settling action.

The sewage sewage accumulated in the settling tank 33 flows into the aeration tank 34 provided in the next stage from the passage hole provided in the partition plate 32. The aeration tank 34 is provided with an air diffuser 35 and an air lift pump 36 for lifting sludge. The air lift pump 36 includes an outer cylinder 36a, an air feed pipe 36b inserted therein, and a foaming member 36c attached to the tip of the air feed pipe 36b.

In the aeration tank 34, the air discharged from the air diffuser 35 into the dirty water and diffused therein is contacted with the dirty water to promote purification.

By the way, in the first-stage sedimentation tank (not shown), sedimentation is promoted by the presence of a certain amount of sludge containing bacteria. Therefore, if the amount of sludge containing bacteria is reduced, the sludge generation action is reduced. Therefore, a part of the sludge in the aeration tank 34 is transferred to the first settling tank by the air lift pump 36 to keep the amount of bacteria and sludge in the first settling tank at a predetermined amount.

That is, the air sent from the air supply pipe 36b of the air lift pump 36 is discharged as bubbles from the foaming member 36c into the outer cylinder 36a. When the bubbles rise in the outer cylinder 36a, the sludge settling at the bottom of the aeration tank 34 is pulled up together with the bubbles and transferred to the first stage settling tank. The water purified in the aeration tank 34 is finally discharged to the outside through a disinfection tank (not shown).

Compressed air is supplied to the air diffuser pipe 35 and the air supply pipe 36b from the pump 1 shown in the above embodiment. The discharge amounts of the air discharged from the two discharge ports 11 and 21 provided in the pump 1 are different from each other as described above. Therefore, the air discharged from the discharge port 21 that obtains a small discharge amount is connected to the air supply pipe 36b, and the air discharged from the discharge port 12 that obtains a large discharge amount is connected to the diffuser pipe 35. Pipe it.

As described above, by using the pump 1 of the present invention, it is possible to supply the compressed air having the discharge amount set in two stages to the septic tank without providing a flow rate adjusting unit in the middle.

The drive source for reciprocating the piston uses the attraction force / repulsion force of the electromagnetic circuit and the spring, but the drive source is not limited to this, and a motor source may be used. Good.

[0041]

[Effect of device]

 As is apparent from the above description, according to the present invention, a plurality of stages of different discharge amounts can be obtained from separate discharge ports with a simple configuration. As a result, in applications that require two or more types of discharge amounts, it is not necessary to provide a valve for adjusting the flow rate between the pump and the place of use or equipment used, and the troublesome operation of the valve can be eliminated.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a pump using two diaphragms showing a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of a pump using a diaphragm and a piston according to a second embodiment of the present invention.

FIG. 3 is a schematic view showing a cross section of a main part of a pump showing a third embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of a purification device showing an application example of a pump according to the present invention.

[Explanation of symbols]

1 ... Pump, 2 ... Casing, 3 ... Shaft,
5, 6 ... diaphragm, 9, 10 ... compression chamber, 11, 2
0 ... Suction port, 12, 21 ... Discharge port, 16, 25 ... Suction valve, 13, 17, 22, 26 ... Compression coil spring, 1
4, 18, 23, 27 ... Spring chamber, 19, 28 ... Discharge valve

Claims (1)

[Scope of utility model registration request] 1. A reciprocating pump configured to change the volume of a compression chamber by a reciprocating drive source and having an intake port and a discharge port opened to the compression chamber, wherein a plurality of reciprocating drive sources drive the same. A reciprocating body, and a plurality of compression chambers formed by partitioning the casing with the plurality of reciprocating driving bodies, wherein at least one volume change amount of the plurality of compression chambers due to reciprocating movement of the reciprocating body, The reciprocating pump, wherein the area of the reciprocating body forming the wall surface of the partition of the compression chamber is determined so as to be different from the volume change amount of other compression chambers.