JPH0357889A - Diaphragm pump - Google Patents

Abstract

PURPOSE:To obtain a diaphragm pump which is able to obtain a high discharge pressure, by arranging so that a fluid which has been pressurized at the 1st pump chamber may be sent out after further having been pressurized at the 2nd pump chamber whose capacity is smaller than that of the 1st pump chamber. CONSTITUTION:When a motor 1 is rotated, a lever 13 conducts swinging with a shaft 14 as a center, and when the lever 13 is turned clockwise, it presses pushingly a diaphragm 7 and the inner capacity of a pump chamber 9 is made to be smaller, thus the pressure of a fluid within the pump chamber 9 becomes higher due to being compressed, and the fluid flows into a pump chamber 10 by opening a connecting valve 9. At this time, the inner capacity of the pump chamber 10 is made to be larger by means of the diaphragm 8 due to the turning movement of the lever 13, thus the fluid makes a sure inflow. When the motor 1 rotates further, the turning movement direction of the lever 13 is reversed, thus a suction stroke at which the fluid makes inflow through a suction opening 6 by opening a suction valve 4, is brought on the pump chamber 9 side, and conversely, on the pump chamber 10 side, a high pressure fluid which is obtained by pressurizing further the fluid that has been pressurized at the pump chamber 9, is sent out through a discharge opening 5 via a discharge valve 12.

Description

[Detailed description of the invention] [Industrial application field]

The present invention is characterized in that the volume of the pump chamber is changed by driving the diaphragm.
This invention relates to a diaphragm pump that sucks in and discharges fluid by means of a pump.

[Conventional technology]

A diaphragm pump changes the internal volume of the pump chamber by moving a diaphragm, sucks fluid into the pump chamber when the internal volume increases, and discharges fluid from the pump chamber when the internal volume decreases. had only a single pump chamber and a single diaphragm.

[Problem to be solved by the invention]

For this reason, conventional diaphragm pumps were unable to achieve high discharge pressure. The present invention has been made in view of these points, and its object is to provide a diaphragm pump that can obtain high discharge pressure.

[Means to solve the problem]

Therefore, the present invention provides first
A second pump comprising a pump chamber and a second pump chamber, and a driving means for alternately driving diaphragms in both pump chambers, the suction section being connected to the discharge section of the first pump chamber via a valve. The chamber is characterized in that it has a smaller volume than the first pump chamber. [Operation] According to the present invention, the fluid compressed in the first pump chamber is transferred to the second pump chamber.
Since it can be further compressed in the pump chamber, a high discharge pressure can be obtained. [Embodiment] The present invention will be described in detail below based on the illustrated embodiment.A motor 1 is installed in pump cases 2 and 3 on one side, and the periphery thereof is supported and fixed by the joint of the pump cases 2 and 3. Two diaphragms 7 and 8 are disposed, and pump chambers 9 and 10 are respectively formed between these diaphragms 7 and 8 and the inner surface of the pump case 3. Note that both diaphragms 7 and 8 here are integrally formed of a rubber-based elastic material. The pump chamber 9 in the pump case 3 is provided with a suction port 6 that is closed by a suction valve 4, and the pump chamber 10 side in the pump case 2 is provided with a discharge port that communicates with the pump chamber 10 via a discharge valve 12. Exit 5 is provided. Furthermore, a communication valve 11 is provided between the pump chamber 9 and the pump chamber 10, and serves as a discharge valve when viewed from the pump chamber 9 side, and serves as a suction valve when viewed from the pump chamber 10 side. The pump chambers 9 and 10 are connected. Note that the inner diameter of the pump chamber 10 is smaller than that of the pump chamber 9. Further, the communication valve 11 and the discharge valve 12 are also formed integrally with both the diaphragms 7 and 8. On the other hand, inside the pump case 2, a lever 13 is disposed which is pivotally supported by a shaft l4, one end of the lever 13 is connected to the diaphragm 7, the other end of the lever 13 is connected to the diaphragm 8, and the lever 13 is connected to the diaphragm 8. An eccentric shaft 15 attached to the output shaft of the motor 1 is inserted into a long hole 16 formed in the lever 13. In addition, since the lever 13 and each diaphragm 7, 8 are connected at both ends sandwiching the shaft 14, the lever 13
The diaphragms 7 and 8 are always driven in the opposite direction as the diaphragms 7 and 8 rotate.
The compression steps of the pump chambers 9 and 10 are performed alternately.
Further, the distance from the connection point with each diaphragm 7.8 in the lever 13 to the shaft 14 is made shorter on the diaphragm 8 side, so that the stroke of the diaphragm 8 is smaller than that of the diaphragm 7. In this diaphragm pump, when the motor 1 is rotated, the lever 13 swings around the shaft 14, and when the lever l3 rotates clockwise in the figure from the state shown in FIG. , as shown in FIG.
3 presses the diaphragm 7 to reduce the internal volume of the pump chamber 9, the fluid in the pump chamber 9 is compressed and its pressure increases, which opens the communication valve 9 and flows into the pump chamber 10. At this time, since the diaphragm 8 increases the internal volume of the pump chamber 10 by rotating the lever 13, the fluid discharged from the pump chamber 9 reliably flows into the pump chamber 10. When the motor 1 further rotates, the direction of rotation of the lever 13 is reversed, so that the pump chamber 9 enters an intake process in which the suction valve 4 is opened and fluid flows in from the suction port 6, as shown in FIG. , conversely, the pump chamber 10 (Ill is a high-pressure fluid obtained by further compressing the fluid compressed in the pump chamber 9) is sent out to the discharge port 5 through the discharge valve 12.
The pump chambers 10 equipped with It is something that Note that it is preferable that the diaphragm 8 is thicker than the diaphragm 7.

【Effect of the invention】

As described above, in the present invention, the fluid pressurized in the first pump chamber is transferred to the second pump chamber, which has a smaller volume than the first pump chamber.
It is possible to obtain high discharge pressure by further pressurizing the pump chamber.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a perspective view of an embodiment of the present invention, and FIGS. 2 to 4 are longitudinal sectional views of the same, in which 1 is a motor, 7 and 8 are diaphragms, and 9, 10 indicates a pump chamber, and l1 indicates a communication valve.

Claims (1)

[Claims] (1) It is equipped with a first pump chamber and a second pump chamber, each of which is provided with a diaphragm, and is also equipped with driving means that alternately drives the diaphragms in both pump chambers, and a suction section is located in the discharge section of the first pump chamber. A diaphragm pump characterized in that a second pump chamber to which the two pump chambers are connected via a valve has a smaller volume than the first pump chamber.