JPS59175832A - Vacuum conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a vacuum 9
4 It is related to the rectifier.

For example, in the case of vacuum milking for dairy cows, it is extremely important to maintain the vacuum level of the vacuum source at a constant level.An unstable vacuum can easily cause mastitis, etc. It is an extremely harmful factor to the health of people. As a method of maintaining the vacuum level of this vacuum source at a constant level, by controlling the amount of air flowing into the vacuum source, the amount of air increased from the vacuum generator is equalized with the amount of air flowing into the vacuum source. There is a method of keeping the degree of vacuum constant, and it is in practical use.

As a conventional vacuum regulator using the above method,
-6242 and British Patent No. 1440901. That is, a diaphragm equipped with a valve body that adjusts the amount of air flowing into the vacuum source defines a color chamber on the side of the valve body and a second chamber on the opposite side from the valve body, with the first chamber on the large side. Upon release, the second chamber communicates with the dog through the ostium;
Further, the flood chamber 2 is a bark connected to the vacuum source through an auxiliary valve, and the vacuum pressure in the shaft 2 chamber is controlled by transmitting the vacuum pressure of the vacuum source to the brush chamber 2 through the auxiliary valve. This is a system in which the opening degree of the front valve body is adjusted by

The vacuum regulator of the above type uses a constant force such as a spring configured to move the auxiliary valve in the closing direction, and a force due to the vacuum pressure of the vacuum source that moves the auxiliary valve in the opening direction. The auxiliary valve is opened and closed depending on the difference in the
By operating the auxiliary valve in the opening direction, the vacuum pressure of the vacuum source is
chamber and actuates the valve body in the opening direction. Conversely, by operating the auxiliary valve in the closing direction, the vacuum pressure in the second chamber is lowered and the valve body is operated in the closing direction. These continuous operations keep the vacuum pressure of the vacuum source constant, and in a balanced state, the amount of air flowing into the vacuum source via the valve body and the amount of air taken out by the vacuum generator do not match. ing.

This type of vacuum regulator generally has a longer stop time than its operating time, and during the stop period, the only force applied to the auxiliary valve is the constant force that operates the auxiliary valve in the closing direction. The valve is closed. This results in the following dryness defects. Due to smoke, dust, etc. in the air that adheres to the auxiliary valve and the valve seat during operation or stoppage, the auxiliary valve and the valve seat tend to stick together while the vacuum regulator is stopped.

This interferes with vacuum pressure control at the initial stage of operation, making it impossible to perform accurate control.

In order to prevent this, periodic inspection and maintenance is necessary, but users do not always carry out this, and
Currently, the defective Sho-1 was being used. In the above-mentioned conventional structure, the second chamber communicates with the atmosphere through the small hole, so the hole is likely to become clogged. This type of vacuum regulator is mostly used in poorly ventilated areas with a lot of moisture and dust, such as milking sheds, etc.; The amount of air flowing into the second chamber changes, making it impossible to control the vacuum pressure as expected. To prevent this /J%
Even if an adjustment mechanism such as a needle valve is provided in the hole, it is difficult for the user to adjust it. Nani Special Public Service 1986-6242
Regarding this, the part that senses the vacuum pressure fluctuations of the vacuum source is the spherical valve body of the auxiliary valve, and since its sensing area is small, accurate tracking of pressure fluctuations cannot be expected. As for British Patent No. 1440901, as seen in its second practical example, there were various drawbacks such as the structure tending to become compound and the device itself becoming large.

The present invention seeks to overcome the above-mentioned drawbacks of the prior art by providing a vacuum regulator in which the second chamber is opened to the atmosphere via a pilot valve and communicated with a vacuum source via an aperture having predetermined dimensions. That is.

Hereinafter, an embodiment of the present invention will be explained in detail based on FIG. 1 (6). 1 is the vacuum source whose pressure should be regulated, and 2i
d A valve body that allows the atmosphere to flow into the pure air source 1 is configured to close off the vacuum source 1 from the atmosphere side.

The valve body is connected to the two-piece diaphragm 3, and is defined by the diaphragm 2 into a first chamber 4 on the side of the valve body 2 and a second chamber 5 on the opposite side from the valve body 2.

The first chamber 4 is opened to the atmosphere through a large bag inlet 15 having a filter or the like for passing through the air, and the second chamber 5 is communicated with the vacuum source 1 through a hole 11 having predetermined dimensions. ing. Further, the Asahi 2nd chamber 5 is opened to the atmosphere via a pilot valve 6, and the pilot valve 6 is configured to shut off feces from the second chamber 5.A connecting rod 19 is connected to the pilot valve B. Diaphragm 7 connected via
A sixth chamber 13 is opened to the atmosphere through a filter 14, a fourth chamber 12 is connected to the vacuum source 1, and a third chamber 131i is connected to the second chamber 5 through the pilot valve 6. is communicated with. 8 is a pipe configured to operate the pilot valve 6 in the releasing direction with a constant force;
9 is a screw for adjusting the force of the spring 8. It is also divided into a diaphragm 3 and a ring 18. 10 is a connecting pipe connecting the fourth chamber 12 and the vacuum source 1.

Next, the present invention having the above configuration will be explained in detail.

When the vacuum source 1 is at a constant pressure, the first chamber 4 to the fourth chamber 12 are at atmospheric pressure, and in this state, the valve body 2 is closed by its own weight, and the pilot valve 6 is opened by the force of the spring 8. ing.

When the vacuum pressure of the air source 1 gradually rises, the fourth tube 12 communicating with the vacuum source 1 also rises at the same time, and the spring 8 is compressed by the vacuum pressure acting on the diaphragm 7, and the pilot valve 6
operates in the closing direction. At that time, the second chief 5 was lJ・Ko 11
Since the vacuum source 1 is in communication with the vacuum source 1 through the Since the amount of air flowing out is larger than the amount of outflowing air limited by lJ/hole 11, the valve body 2 is not made heavy.

As the vacuum pressure of the vacuum source 1 increases, the pilot valve 6 further operates in the closing direction, and when the vacuum source 1 reaches the set vacuum pressure, the second chamber 5 becomes a predetermined vacuum pressure, and the valve body 2 is moved in the opening direction. Let's create 1. At this time, the air flow flowing into the vacuum source 1 through the small hole 11 and the valve body 2 is combined with the amount of air discharged from the vacuum generator (not shown) connected to the vacuum source 1, and Maintain the set vacuum pressure.

Next, when the vacuum of the vacuum source 1 is consumed due to an external factor and the vacuum pressure drops below the set vacuum pressure, the diaphragm 7
is moved in the opening direction, the vacuum pressure in the second chamber 5 is reduced, and the valve body 2 is closed when the vacuum source 1 reaches the set vacuum pressure. When the set vacuum pressure is reached, the valve body 2 operates in the opening direction to maintain the set vacuum pressure. At this time, the total sum of the amount of air flowing in from external factors and the amount of air flowing in from the valve body 2 and the J hole 11 matches the amount of air discharged from the vacuum generator.

When the vacuum consumption from the vacuum source 1 decreases (9), the vacuum source 1 rises above the set vacuum pressure, but at that time the diaphragm 7 is displaced by an amount corresponding to the increased vacuum pressure, and the pilot valve 6 is operated in the closing direction. Accompanying this, the vacuum pressure in the second chamber 5 increases, causing the valve body 2 to further operate in the opening direction. As a result, the vacuum source 1 is
The amount of air flowing into the vacuum source 1 increases, and the set vacuum pressure is maintained by matching the amount of air flowing into the vacuum source 1 with the amount of air being discharged from the vacuum generator.

As explained above, according to the embodiment of the present invention, the pilot valve is open during the stop period when no vacuum pressure is applied, and is not completely closed even under normal operating conditions. Prevents the pilot valve from sticking due to moisture, smoke, dust, etc. Furthermore, since the J hole is not directly exposed to the atmosphere, clogging due to moisture, dust, etc. is reduced, and stable vacuum pressure control can be performed. This eliminates the need to provide an adjustment mechanism in the J hole, thereby simplifying the apparatus. Furthermore, while the device is in operation, the large side (10) always flows into the vacuum source via the pilot valve and the /J% hole, so chattering of the device can be prevented. The above effect was obtained by allowing the second chamber to open freely via a pilot valve and communicating with the vacuum glue via an lJ hole having a predetermined size. By using a movable partition with a large pressure-receiving area, such as a diaphragm, as the part that senses vacuum pressure fluctuations in the vacuum source, it is highly sensitive to vacuum pressure fluctuations, making it possible to perform highly accurate control. It is.

Next, FIG. 2 shows another embodiment. The configuration is such that the second chamber 5 and the vacuum source are communicated through the connecting rod 1, and the movable partition member 7 that defines the sweat chamber 13 and the hunger chamber 12 is a bellows. It is something. In Figure 1, the second chamber and the vacuum source are connected through the /1 hole, whereas in Figure 2, the second chamber is connected to the vacuum source through the hollow part of the connecting rod. 11'2
The same effect as 1 can be obtained.

As another example, by using a bendable elastic body as the connecting rod 19, it is possible to reduce chattering caused by frictional resistance of the pilot valve 6 caused by eccentricity of the diaphragm or bellows, and to ensure more reliable force control. can be done.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing one embodiment of the present invention, and Figure 2 is a sectional view showing another embodiment of the invention.1-Vacuum source
11-Opening hole 2-Valve body 12-Rod 4 chamber 6-Diaphragm 13-Third chamber 4-First chamber
14- Filter 5- Second chamber 19
Connecting rod 6 - Pilot valve 7 - Partition member 8 - Pi Patent applicant Orion ELJ Co., Ltd.

Claims (1)

[Claims] 1. A valve body (2) that adjusts the amount of air flowing into the vacuum source (1).
) The valve body (2) (l
llll's first nitrogen (4) and the second valve body (2) on the opposite side.
The first chamber (4) is opened at all times, and the degree of vacuum in the second chamber (5) is controlled using the vacuum of the vacuum source (1). In the vacuum regulator configured as shown in FIG. A vacuum regulator characterized in that it communicates with a source (1). 2. The sixth chamber (16) is exposed to the atmosphere via the filter (14) by the displaceable partition member (7) connected to the pilot valve (6) via the connecting rod (19).
and a fourth chamber (12) communicating with the vacuum source (1), a sixth chamber (13) communicating with the second chamber (5) via the pilot valve (6), The pilot valve (6) is configured to close the sixth chamber (16) from the second chamber (5) side, and is actuated in the opening direction by a constant force such as a spring (8). A vacuum regulator according to claim 1, characterized in that it is authoritatively published as follows. 6. The vacuum regulator according to claim 2, wherein the partition member (7) is a diaphragm. 4. The vacuum regulator according to claim 2, wherein the partition member (7) is a bellows. 5. The connecting rod (19) has a predetermined dimension) by communicating with the second chamber (5) and the vacuum source (
1) The vacuum regulator according to any one of claims 2 to 4, characterized in that the vacuum regulator is in communication with the vacuum regulator. 6. The vacuum device according to any one of claims 2 to 5, characterized in that the connecting rod (19) is made of a bendable elastic body.