JPS6367258A - automatic air supply device - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to an automatic air replenishment device that automatically sucks in and replenishes the pressure tank of a well pump with outside air when the pump starts and stops.

``Conventional technology'' Automatically operated well pumps store air in a pressure tank, and use the compressibility of the air to gradually change the internal pressure that changes with water supply and water discharge to perform intermittent operation. Operate.

The air inside the pressure tank, which is essential for such automatic driving, gradually decreases because it easily permeates water.

Therefore, it is necessary to periodically replenish the pressure tank with air, and conventionally, an automatic air replenishment device as shown in FIG. 3 has been provided to automatically replenish this air.

The automatic air supply device shown in FIG.
A diaphragm 3 is provided between the and second case 2, and this diaphragm 3 is operated using the negative pressure and positive pressure generated by starting and stopping the pump, and draws outside air into the pressure tank. It was gushing.

Such an operation occurs when the working 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 suction side of the pump, and as the pump operates, the diaphragm 3 flows into the space formed. becomes a negative pressure, and the diaphragm 3 moves against the spring 5.

At this time, as the diaphragm 3 moves, the intake port 6
Inhale outside air from

Furthermore, when the pump stops, the downstream side of the check valve becomes positive pressure, so there is positive pressure flowing into the space through the action hole 4.
The spring 5 restores the diaphragm 3 to its initial position.

As the diaphragm 3 is restored, the air taken in in the previous process is blown out into the pressure tank via the blowout lower.

In order to perform such operations smoothly, a valve mechanism is required at least for the intake port 6 and the jet lower, and a large number of parts are required to construct these two valve mechanisms.

Moreover, it is not easy to assemble a large number of parts.In particular, if the jetting lower is not connected to the pressure tank from the upper side of space A, if water accumulates in space A, the jetting resistance will increase and the air sucked in will If the pressure tank is located at the bottom and there is a problem in which the water cannot be sprayed into the pressure tank in a short period of time,
A combination of a long spout path and valve 8 was required.

Such a configuration has the problem that the operation of the valve 8 cannot be stabilized unless a part such as a pipe 9 is inserted into the ejection passage to reduce the volume of the ejection passage in order to stabilize the operation.

In addition, parts such as a stopper 9 are required to prevent the valve 8 from falling off, and assembly of these components requires care not to damage the valve 8, making it troublesome.

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

That is, the valve 8.10 requires members such as the valve seat 12 and the cap 11 at the front and rear to hold the valve member, and together with these members, the assembly becomes troublesome.

"Problems to be Solved by the Invention" The present invention was made in view of these circumstances.
It is an object of the present invention to provide an automatic air replenishing device which is configured to have fewer parts, to be easily assembled, and to not impair reliability.

"Means for Solving the Problems" The present invention includes a first case formed so that an air jet port and an air intake port are opened to one side, and a part such as a ball attached to the air jet port and the air intake port. The problem is solved by attaching a second case so as to close the open air outlet and intake port, and forming the working surface of the diaphragm with the first case and the second case. are doing.

1 action" Components such as valves can be attached through the open parts of the ejection port and intake port formed in the first case, and the open parts can be closed in the second case. The spout and inlet with parts are easily assembled.

Moreover, by attaching the second case to the open part on one side of the valve structure, not only can one side be easily assembled, but the other side can be assembled with a cup when molding the first case. If it is formed into a shape, there is no need for processing or assembly.

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

In FIG. 1, the automatic air supply device is installed in the first case 1.
4 is open at one end to form a jet port 15 and an intake port 16, respectively.

The spout 15 and the intake port 16 are each equipped with a ball type valve 17,18, and the spout 15 has a
A blowout passage 19 is formed that communicates with a pressure tank (not shown), and the intake port 16 has a suction port 20 that communicates with the outside air.
is formed.

Furthermore, in one ejection passage, a narrow groove is formed from the ejection port 15 to the top and bottom of the first case 14, avoiding the intake port 16, and opens to one side like the ejection port 15, etc.
It is constructed so that molding can be easily performed.

Further, the intake port 16 is provided with a valve seat 21 made of a material such as rubber, and constitutes a valve mechanism that operates satisfactorily with respect to air.

A second case that collectively closes the portions of the first case 14 that are open to one side of the spout 15, the intake port 16, and the spout passage 19.
The first case 14 and the second case 22 form a working surface of a dish-shaped diaphragm 23.

The diaphragm 23 is pressed against the action surface by the spring 24 and is unevenly distributed, and due to the uneven distribution, the diaphragm 23 is
is held in the third case 25.

This space B is provided with an operation hole 26 that communicates with the downstream side of a check valve of a pump (not shown).

In FIG. 2, the second case 22 of the automatic air supply device
A through hole 27 is formed to hold the valve 17 of the jet port 15 and also serves as a valve seat, and a through hole 28 is further formed to hold the valve 18 of the intake port 16.

A flange 29 is formed on the side surface, and when it is attached to the open part of the first case 14, the ejection passage 19 is formed in the attached part.

In such a configuration, the automatic air replenishment device has the first case 14, the second case 22, and the third case 25 each made of an easily moldable material such as resin, and the valve 17.
18 etc. are configured so that they can be easily assembled.

Then, these first case 14 and second case 22
Since the third case 25 is open to one side such as the spout 15, molding is easy and the mold has a simple configuration.

Furthermore, assembly is completed by simply fitting the second case 22 into the first case 14 through the valves 17 and 18, and the ejection passage 19
For portions whose volume should be reduced, such as, the first case 14 is formed as an open hole and the second case 22 is used as a closed hole, so that it is possible to easily construct a small-volume ejection passage 19. .

That is, the first case 14 and the second case 2 are formed in the mold.
Since the cross-sectional area of the ejection passage 19 can be determined by the difference in shape between the two, a narrow groove can be formed by the difference between the two without forming a narrow groove from the beginning, and it is easy to form an ejection passage 19 with a small volume. becomes.

After attaching the second case 22 to the first case 14,
The third
By providing the case 25, the automatic air supply device is completed.

"Effects of the Invention" Compared to the conventional structure shown in FIG. Improvements have been seen in that it can be easily made smaller, and its effects are extremely effective in assembling well pumps, and it also has the effect of improving reliability in air replenishment performance.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-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 longitudinal sectional view showing a conventional automatic air supply device. 14...first case, 15...spout port, 16
...Intake port, 19...Ejection path, 22...Second
case, 23... diaphragm, 25... third case.

Claims (1)

[Claims] In an automatic air replenishment device that moves a diaphragm using negative pressure and positive pressure generated by pump operation and stop, and replenishes outside air into a suction tank, an air replenishment device is used. A second case is attached to the first case, and a second case is installed so as to provide parts such as balls in the jet nozzle and the intake port, and to close the opened jet nozzle and the intake port. An automatic air replenishing device characterized in that the action surface of the diaphragm is formed by the case of item 2.