JP4074980B2 - Diaphragm pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a diaphragm pump.
[0002]
[Prior art]
A conventional diaphragm pump has a configuration as shown in FIG. 2, for example. In FIG. 2, 1 is a motor, 2 is an output shaft of the motor 1, 3 is a crank base fixed to the output shaft 2 of the motor 1, 4 is a drive shaft fixed to the crank base 3 by being inclined, It is a drive body attached to the drive shaft 4 so as to be rotatable.
[0003]
Reference numeral 6 denotes a case, 7 denotes a cylinder portion, 8 denotes a valve housing, and 10 denotes a diaphragm body in which a plurality of diaphragm portions 11 and a cylindrical discharge valve 12 are integrally formed. Reference numeral 13 denotes a pump chamber formed by each diaphragm portion 11 and the valve housing 8. Reference numeral 14 denotes a discharge port.
[0004]
In the diaphragm main body 10, each diaphragm portion 11 having a drive portion 11 a is arranged in the cylinder 7 a of the cylinder portion 7, and the cylindrical discharge valve 12 is placed in a common chamber 8 a formed in the valve housing 8. Be placed. Thus, the diaphragm main body 10 is sandwiched and held between the cylinder portion 7 and the valve housing 8. In this state, the case 6, the cylinder portion 7, and the valve housing 8 are combined as shown in the figure, and a lid 20 having a hole 20 a is further stacked and fixed with screws 15. A groove connecting the common chamber 8a and each diaphragm portion 11 (pump chamber 13) is formed on the inner wall surface of the common chamber 8a of the valve housing 8. Reference numeral 16 denotes a suction valve arranged at a portion where each diaphragm portion 11 (pump chamber 13) of the valve housing 8 is located, and 17 denotes a suction port.
[0005]
In this conventional diaphragm pump, the crank base 3 is rotated by the rotation of the output shaft 2 driven by the motor 1. The drive shaft 4 attached to the crank table 3 in an inclined manner by the rotation of the crank table 3 continuously changes the inclination direction.
[0006]
Due to the movement of the drive shaft 4, the inclination of the drive body 5 also changes continuously, and the drive part 11 a of each diaphragm part 11 fixed to the drive body 5 due to the change of the inclination reciprocates. .
[0007]
Due to the reciprocation of the drive unit 11a, the volume of each pump chamber 13 changes with a certain phase difference.
[0008]
For example, when the drive unit 11a moves forward and the volume of the pump chamber decreases, the pressure in the pump chamber increases, so that the fluid in the pump chamber opens the cylindrical discharge valve 12 through the groove 8b and passes through the common chamber 8a. It is supplied from the discharge port 14 to the outside of the pump. On the contrary, when the volume of the pump chamber 13 is increased by the retreat of the drive unit 11a, the pressure is decreased. As the pressure in the pump chamber decreases, the discharge valve 12 closes, while the suction valve 16 opens, and fluid flows from the outside into the pump chamber as indicated by arrow A.
[0009]
The pumping action is performed by repeating the above motion.
[0010]
[Problems to be solved by the invention]
Here, this conventional diaphragm pump has a problem of generating noise due to the flow of fluid.
[0011]
In order to solve this problem, the pump shown in FIG. 2 is silenced by forming a chamber (silence chamber) in the part shown in FIG. 2 by fixing a lid 20 having a hole 20a to the valve housing. I try to do it.
[0012]
However, the pump with such a configuration has an insufficient noise reduction effect.
[0013]
In order to increase the noise reduction effect and make the pump quieter with the pump shown in FIG. 2, the volume of the space (silence chamber) formed between the valve housing and the lid should be increased. Good.
[0014]
However, when the volume of the sound deadening chamber is increased, there is a disadvantage that the pump is increased in size, for example, the height of the pump itself is increased.
[0015]
The present invention provides a very quiet diaphragm pump that is small and provides a sufficient silencing effect.
[0016]
[Means for Solving the Problems]
The diaphragm pump of the present invention includes a case, a cylinder portion, a valve housing having a cylindrical common chamber that communicates with a discharge port, a diaphragm portion disposed in each cylinder of the cylinder portion, and a common formed in the valve housing. A diaphragm main body integrally formed with a cylindrical discharge valve disposed in the chamber; and a suction valve provided at a suction port formed at each diaphragm portion of the valve housing. A pump that feeds fluid from the discharge port to the outside through a common chamber by sucking from each suction port by reciprocating a drive unit provided integrally with the unit with a constant phase difference, A space formed by the space, the case, and the cylinder portion while forming a sealed space on the suction side of the valve housing In the pumping operation, a fluid is opened from the space formed by the case and the cylinder portion through the flow path and through the sealed space to open the pump chamber and the discharge chamber. It is a pump that performs a pumping action to supply through a valve and a common chamber.
[0017]
As described above, the diaphragm pump of the present invention includes a sound deadening chamber (a space formed between the valve housing and the lid) formed outside the inlet of the valve housing, a space formed by the case, and the cylinder portion. By forming a flow path connecting the two, two sound deadening chambers are provided, and by increasing the volume of the space forming the sound deadening chamber, the sound deadening effect is increased.
[0018]
In addition, since one of the sound deadening chambers uses a case for housing a pump drive mechanism or the like as it is, it can be realized without changing the size of the pump itself.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a diaphragm pump of the present invention will be described with reference to the drawings.
[0020]
FIG. 1 shows a diaphragm pump of the present invention. In FIG. 1, 1 is a motor, 2 is an output shaft of the motor 1, 3 is a crank base fixed to the output shaft 2 of the motor 1, and 4 is a crank base. 3 is a drive shaft fixed to be inclined with respect to 3, 5 is a drive body attached to the drive shaft 4 so as to be rotatable, 6 is a case, 7 is a cylinder portion, 8 is a valve housing, and 10 is a plurality of diaphragm portions. 11 is a diaphragm main body integrally formed with a cylindrical discharge valve 12. Reference numeral 13 is a pump chamber, and 14 is a discharge port.
[0021]
Reference numeral 16 denotes a suction valve disposed at a position where each diaphragm portion (pump chamber) of the valve housing 8 is located, 17 denotes a suction port, and 18 denotes a lid.
[0022]
The above configuration is substantially the same as that of the conventional diaphragm pump in which a silencer chamber is provided on the suction side of the valve housing shown in FIG.
[0023]
As shown in FIG. 1, the diaphragm pump according to the present invention forms a silencer chamber by providing a sealed space in the upper part of the valve housing 8 without providing a hole in the lid 18 so as to communicate with the outside. 7, the valve housing 8, the screw hole 15 for fixing the lid 18, the cylinder hole 7 and the hollow hole 21 formed in the valve housing 8, the case, the connection hole 22 for connecting the space in the cylinder, and the valve housing And a connection hole 23 connecting the sealed space (silence chamber). As a result, a flow path that connects the space formed by the case and the cylinder portion and the sealed space of the valve housing via the connection hole 23, the fool hole 21, and the connection hole 22 is configured.
[0024]
In this embodiment, a screw 15 for tightening and fixing the case 6, the cylinder portion 7, the valve housing 8, and the lid 18 is provided, but the positions of the cylinder portion 7 and the valve housing 8 are fool holes in the screw hole portion. Therefore, this is the flow path 21.
[0025]
Since the diaphragm pump of the present invention is configured as described above, when performing the pump action, the fluid enters the space in the case from the outside through the vent hole 6 a provided in the case 6, and the connection hole 23 and the flow path 21. Further, after passing through the connection hole 22, the suction valve is opened to enter the diaphragm portion (pump chamber), and the discharge valve is opened to be supplied to the outside through the discharge port.
[0026]
That is, the diaphragm pump of the present invention is different from the conventional example shown in FIG. 2 in that the fluid flows through the space in the case and cylinder part, and further flows from the sealed chamber to the pump chamber as shown by the arrow B in FIG. The action is different, but the others are the same.
[0027]
Moreover, the diaphragm pump of the embodiment shown in this figure is configured to form a fluid by utilizing the position of the screw 15 for fixing the case, the cylinder portion, the valve housing, and the lid integrally. Any portion may be used as long as a through hole penetrating the cylinder portion and the peripheral portion of the valve housing is used as a flow path. In that case, there is a place where the diaphragm main body 10 is held between the valve housing 8 and the cylinder portion 7 with the peripheral portion of the diaphragm main body 10 interposed therebetween. When the flow path is formed in this portion, it is necessary to provide a hole around the diaphragm body 10 as well. However, the flow path can be easily formed by using a hole as in the embodiment shown in FIG.
[0028]
As described above, the present invention forms the air holes 6a in the case 6 and the flow path connecting the space formed by the case / cylinder and the sound deadening chamber. From the space formed by the case and cylinder part, it passes through the flow path and enters the sound deadening chamber, and then enters the pump chamber from the discharge port.
[0029]
That is, the space formed by the case and the cylinder part forms a sound deadening chamber. As a result, the diaphragm pump of the present invention includes two sound deadening chambers, and the sound deadening effect can be increased. Moreover, the space formed by the case and the cylinder part has a large volume, and the silencing efficiency is extremely large.
[0030]
Therefore, a very quiet diaphragm pump can be constructed.
[0031]
Furthermore, as the sound deadening chamber formed in the case and the cylinder portion, a case for housing a driving mechanism such as a crank base, a drive shaft, and a driving body is used as the sound deadening chamber as it is. However, the silencing effect can be increased with a small pump without changing the size of the entire pump.
[0032]
【The invention's effect】
According to the present invention, significant noise reduction can be obtained without increasing the size, and thus a quiet and small blade diaphragm pump can be realized.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a diaphragm pump according to the present invention. FIG. 2 is a diagram showing a configuration of a conventional diaphragm pump.
6 Case 7 Cylinder part 8 Valve housing 10 Diaphragm body 11 Diaphragm part 12 Discharge valve 13 Pump chamber 15 Screw 18 Lid 21 Flow path

Claims (3)

A case, a cylinder part, a valve housing having a cylindrical common chamber communicating with the discharge port, a diaphragm part disposed in each cylinder of the cylinder part, and a cylindrical shape disposed in the common chamber formed in the valve housing The diaphragm main body is integrally formed with one discharge valve, and the suction valve provided at the suction port formed at the position of each diaphragm portion of the valve housing, and is provided integrally with the diaphragm portion. A pump that sucks in through each suction port by reciprocating the drive unit with a certain phase difference, opens a discharge valve, and supplies fluid from the discharge port to the outside through a common chamber, on the suction side of the valve housing A flow path is provided that forms a sealed space and communicates the space with the space formed by the case and the cylinder portion, and In the operation of the pump, the pump supplies the fluid through the pump chamber, the discharge valve, and the common chamber by opening the suction valve through the flow path through the sealed space from the space formed by the case and the cylinder portion. Diaphragm pump that works. The diaphragm pump according to claim 1, wherein the flow path is formed in a peripheral portion of the cylinder portion and the valve housing. 2. The diaphragm pump according to claim 1, wherein the case, the cylinder, and the valve housing are integrated by screwing, and the flow path is formed in at least one screwing portion.

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