JPS6029677Y2 - air compressor valve equipment - Google Patents

Description

[Detailed description of the invention] The present invention is based on a disc-shaped elastic valve 3 whose center portion is fixed to the upper surface of the valve seat 1, and whose outer peripheral portion facing the air vent 2 of the valve seat 1 is curved upward. The pressure receiving part 7 is formed and the pressure receiving part 7 is
The wall thickness is gradually reduced from the inner periphery to the outer periphery, and an annular thin-walled part is formed inside the inner periphery of the pressure receiving part 7 to form the bent part 5, and the lower surface of the inner part is connected to the valve seat 1. The present invention relates to a valve device for an air compressor that is tightly attached to the upper surface, and the object thereof is to provide a valve device for an air compressor that can improve valve efficiency and valve life while reducing the number of valve devices.

Since the conventional elastic valve 3 was bent as a whole as shown in Fig. 6, the wall thickness could not be increased too much, and due to deformation over time, the pressure receiving pressure was located in the air vent 2 part as shown in Fig. 7. The portion 7 was depressed and the sealing performance was deteriorated.

If the wall thickness of the pressure receiving part 7 is made thick to prevent this fall, it becomes difficult to move and efficiency deteriorates, and when the valve seat 1 is struck, the impact becomes large and the noise becomes high.

Furthermore, the bending stress when the elastic valve 3 is opened and closed is concentrated on the pressure receiving part 7, resulting in a short life span.

In addition, in order to prevent the pressure receiving part from falling down, it has been proposed that the peripheral edge of the pressure receiving part is bent downward, but because the wall thickness of the part that supports the pressure receiving part is thick, the opening and closing resistance of the valve becomes large and the valve efficiency is reduced. However, the problems of a decrease in the performance and a tendency to breakage due to fatigue have not been solved.

The present invention has been made in view of the above points, and the present invention will be explained in detail below using examples.

An annular air vent 2 is provided on the outer periphery of the valve seat 1.
A disk-shaped elastic valve 3 is fixed to the upper surface of the valve seat 1 at the approximate center thereof with a fixing member 8 such as a screw.

As shown in FIG. 1, a thin part is formed at the base of the elastic valve 3 at the upper surface of the valve seat 1, and this part serves as a bent part 5. The thickness is made to gradually become thinner toward the outer periphery, and the pressure receiving portion 7 between the seal portions 4 on the outer periphery has an arcuate cross-section.

When air flows in from the air vent 2, the elastic valve 3 is opened using the bent portion 5 as a bending point.

Figure 2 shows an example in which the present invention is applied to a diaphragm pump, where 12 is the pump body, 13 is a magnetic circuit, 14 is a vibrator block, 15 is a diaphragm rubber, 17 is a casing block, 19 is a compression chamber, and 20 is a It is a chamber case.

As mentioned above, the present invention has the advantage that the seal part on the outer periphery of the elastic valve is made thin, so there is less impact on the valve seat and noise can be reduced. Since the bending part is provided with a thin bending part, the bending part mainly receives only the stress due to bending, and the stress due to the pressure difference between the inside and outside of the valve is received by the pressure receiving part between the support part and the seal part, reducing the concentration of stress. This has the advantage of preventing this, and improving the valve life.Furthermore, since the bent portion is thin and has a flexible shape, the valve can be opened and closed with less resistance, which has the advantage of improving the valve actuation rate.

In addition, since the pressure receiving part between the support part and the seal part is curved outward from the air vent, this part can be prevented from falling into the air vent and the life of the seal can be improved. In addition, when the valve is closed, the bottom surface of the support part comes into close contact with the top surface of the valve seat, so the tip part is supported by the support part more than the support part, reducing fatigue and improving deformation life. This has the advantage of improving seal life.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of an embodiment of the present invention, Fig. 2 is a cross-sectional view showing an example in which the present invention is applied to a diaphragm pump, and Figs. 3 and 4 are views of conventional examples. 2 is an air vent, 3 is an elastic valve, 4 is a seal portion, 5 is a bent portion, 6 is a support portion, and 7 is a pressure receiving portion.

Claims (1)

[Scope of utility model registration request] In a disk-shaped elastic valve whose center part is fixed to the upper surface of the valve seat, the outer peripheral part facing the air vent of the valve seat is curved upward to form a pressure receiving part, and the pressure receiving part is curved from the inner periphery to the outer periphery. An air compressor in which the wall thickness is gradually reduced toward the inner periphery of the pressure-receiving part, forming an annular thin-walled part on the inner side of the inner periphery to form a bent part, and the lower surface of the inner part is brought into close contact with the upper surface of the valve seat. valve device.