JPH0674856B2 - Automatic air supply device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic air replenishing device that automatically sucks and replenishes outside air into a pressure tank of a well pump when the pump is operated and stopped.

[Prior Art] A well pump that is automatically operated is configured so that air is retained in a pressure tank, the compressibility of the air is used to maintain water pressure, and water can be constantly supplied and discharged from the pressure tank. .

However, the air inside the pressure tank, which is indispensable for such automatic operation, easily penetrates into the water, and therefore gradually decreases during repeated stoppages of operation.

Therefore, it is necessary to periodically replenish the pressure tank with air. Conventionally, the third method is to automatically replenish this air.
It was equipped with an automatic air supply as shown.

The automatic air supply device shown in FIG.
A diaphragm is provided between the second case 2 and the second case 2, and the diaphragm is operated by utilizing the negative pressure and the positive pressure alternately generated by the operation and stop of the pump, and the outside air is sucked into the pressure tank. Was.

In such an operation, when the action hole 4 formed in the upper part of the second case 2 is connected to the downstream side of the check valve on the water absorption side of the pump, the space A formed by the diaphragm 3 along with the operation of the pump. Becomes negative pressure, and the diaphragm moves against the spring 5.

Then, at this time, the outside air is sucked from the intake port 6 as the diaphragm moves.

Further, when the pump is stopped, the pressure on the downstream side of the check valve becomes positive, so that the space A becomes positive pressure through the action hole 4,
The spring 5 restores the diaphragm to its initial position.

With the restoration of the diaphragm, the air taken in in the previous step is ejected to the pressure tank via the ejection port 7.

In order to carry out such an operation smoothly, at least a valve mechanism is required for the intake port 6 and the ejection port 7, and a large number of parts are required to configure these two valve mechanisms.

Moreover, it is not easy to assemble some parts by assembling, and in particular, if the jet port 7 does not communicate with the pressure tank from the upper side of the space A, the jet resistance becomes large when the water is accumulated in the space A and the sucked air Has a problem that it is not jetted to the pressure tank in a short time, and when the pressure tank is the lower portion, it is necessary to combine a long jet passage and the valve 8.

However, in such a configuration, in order to stabilize the operation, there is a problem that the operation of the valve by the ball is not stable unless the volume of the ejection passage is reduced by inserting a component such as a pipe into the ejection portion of the ejection port 7. Had.

Furthermore, parts such as stoppers are required to prevent the valve from falling off, and assembly of these parts is troublesome because it is necessary to take care not to scratch the outer surface of the ball that will be the valve.

Similarly, when assembling the intake port 6, when the cap 11 is screwed to form the valve 10, the washer 13 is required to prevent the deformation of the valve seat 12, and a large number of components are required. Was.

That is, the valves 8 and 10 require members such as the valve seat 12 and the cap 11 at the front and rear in order to hold the valve members, and the assembly is complicated with these members.

[Problems to be Solved by the Invention] The present invention has been made in view of such circumstances.
It is an object of the present invention to provide an automatic air supply device which has a reduced number of parts, facilitates assembly, and does not impair reliability.

[Means for Solving the Problems] In the present invention, the first case is formed so that the air ejection port and the air intake port are opened to one side, and the groove leading out the ejection port is opened to one side. And a ball forming a valve at the jet port and the intake port, and further closing the jet port and the intake port opened to the one side so as to hold the ball on the valve side. A second case is attached to one side that is open so as to form an ejection path, the working surface of the diaphragm is formed by the first case and the second case, and the third case is interposed via the diaphragm. The problem is solved by having a case.

[Operation] In order to mount the second case by inserting and mounting the ball forming the valve from the open portion of the jet port and the intake port formed in the first case, the second case Thus, the ball forming the valve can be easily held at the ejection port and the intake port so as not to jump out.

Then, the ejection passage can be formed by the groove by mounting the second case through the gap in the groove of the first case.

Furthermore, since the working surface of the diaphragm is formed by the first case and the second case, not only a large working surface of the diaphragm can be given, but also the working surface does not have irregularities and the diaphragm is obstructed. Never give.

[Embodiment] The present invention will be described based on an embodiment shown in the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of an automatic air supply device according to the present invention, and FIG. FIG. 6 is a perspective view showing a second case.

In FIG. 1, the automatic air supply device is shown in the first case 14
One of them is opened to form a jet port 15 and an intake port 16, respectively.

The jet port 15 and the intake port 16 are respectively provided with ball type valves 17 and 18, and the jet port 15 is formed with a jet passage 19 communicating with a pressure tank (not shown).
The intake port 16 is formed with a suction port that communicates with the outside air.

Further, the ejection passage 19 has a narrow groove extending from the ejection port 15 to the upper and lower sides of the first case 14 so as to avoid the portion of the intake port 16, and is open to one side like the ejection port 15 and the like, which facilitates molding. It is configured to be able to.

In addition, the intake port 16 has a valve seat made of a material such as rubber.
21 is provided and constitutes a valve mechanism that performs a sufficiently good operation with respect to air.

A second case that collectively closes a portion of the first case 14 that is open to one of the ejection port 15, the intake port 16 and the ejection passage 19
22 is provided, the first case 14 and the second case 22.
And form the working surface of the diaphragm 23.

The diaphragm 23 is pressed against the working surface by the spring 24 and is unevenly distributed. The uneven distribution forms the space B and is held by the third case 25.

The space B is provided with an action hole 26 communicating with the downstream side of the check valve of the pump (not shown).

In FIG. 2, the second case 22 of the automatic air supply device is shown.
Has a through hole 27 that holds the valve 17 of the ejection port 15 and also serves as a valve seat, and further has a through hole 28 that takes in air through the valve 18 of the intake port 16.

A flange 29 is formed on the side surface, and when mounted on the open portion of the first case 14, the ejection passage 19 is formed on the mounted portion.

In such a configuration, the automatic air supply device forms and manufactures the first case 14, the second case 22 and the third case 25 with a material such as resin that is easy to mold, and the valves 17 and 18 can be easily manufactured. It is configured to be assembled into.

Since the first case 14, the second case 22, and the third case 25 are open to one side such as the ejection port 15, the molding is easy and the molding die has a simple structure.

In addition, the assembly is performed in the first case with the valves 17 and 18 interposed.
The assembly of a complicated part is completed only by assembling the second case 22 to the 14 so that the second case 22 can be fitted to the first case.
Since an open groove is formed in the first case 22 and is closed by the second case 22, the ejection passage 19 having a small volume can be easily configured.

That is, since the cross-sectional area of the ejection passage 19 can be determined by the difference in shape between the first case 14 and the second case 22 in the molding die, even if a thin groove is not formed from the beginning, a narrow groove can be formed due to the difference between the two. It is easy to form the ejection passage 19 that can be formed and has a small volume.

After the second case 22 is attached to the first case 14, the third case is inserted through the diaphragm 23 and the spring 24.
The provision of 25 completes the automatic air supply device.

[Effects of the Invention] Compared to the conventional structure shown in FIG. 3, this kind of assembly requires less parts for assembly, easier molding, easier assembly, Improvements were seen in that the volume can be easily reduced, and the effect is that it is extremely effective for assembling a well pump and that the performance related to air supply also improves reliability. is there.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of an automatic air supply device according to the present invention, and FIG. 2 is a perspective view showing a second case. FIG. 3 is a vertical sectional view showing a conventional automatic air supply device. 14 …… First case, 15 …… Spout port, 16 …… Intake port, 19
...... Spout path, 22 ...... Second case, 23 ...... Diaphragm, 25 ...... Third case.

Claims (1)

[Claims] 1. An automatic air supply device for driving a diaphragm by a negative pressure and a positive pressure depending on whether a pump is operated or stopped to suck outside air and replenish it to a tank. In the first case, an air outlet and an air inlet are provided. Is formed so as to be opened to one side, and a groove for leading out this ejection port is opened to one side, and a ball that forms a valve is provided at the ejection port and the intake port. The second case is attached to the one side opened so as to form the ejection passage in the groove while closing the ejection port and the intake port opened to the one side so as to hold the first case. An automatic air replenishing device characterized in that a working surface of a diaphragm is formed by the second case and a third case with the diaphragm interposed.