Hydraulic magnetic control valve

A hydraulic magnetic control valve includes a base with an inlet and an outlet. A plug provided with a second magnetic member formed thereon is arranged above the outlet of the base for controlling the hydraulic flow, and the top surface of the base is mounted a driving motor. One of the side walls of the base is in a form of a slanted side wall, on which a first magnetic member is slidable upward or downward along the slanted side wall under control of the driving motor. When the first magnetic member slides downward along the slanted side wall, the control valve is in open situation permitting hydraulic material flow from the inlet to the outlet, while the first magnetic member slides upward along the slanted side wall, the control valve is in closed situation thereby stopping up the flow.

BACKGROUND OF THE INVENTION 
The present invention relates to an improved hydraulic magnetic control 
valve, and more particularly to a electromagnetic type control valve 
having a slanted side wall for controlling hydraulic material with 
advantages of low power consumption and good reliability during operation. 
Hydraulic magnetic control valves are widely used in applications of 
hydraulic control system for controlling the flow of the hydraulic 
material, such as water. Typically, the conventional hydraulic magnetic 
control valve is provided with an electromagnetic coil and a plug received 
in the inner space of the control valve. The plug, positioned on the 
outlet of the valve, is adapted to close the outlet of the control valve, 
so as to stop up the water flow from the inlet to the outlet of the 
control valve. In addition, a magnetic member is attached to the top 
surface of the plug, which is magnetically associated with the 
electromagnetic coil during actuation of the coil. In such an arrangement, 
the control valve may be operated under control of magnetic force 
generated by the electromagnetic coil thereby controlling the water flow. 
However, it is found that the prior art hydraulic magnetic control valve 
has disadvantage of poor reliability during stand-by condition of the 
electromagnetic coil of the control valve. One of the important reasons is 
that the position of the electromagnetic coil is unchangeable and is 
normally arranged near in space to the magnetic member. For example, in 
case that the intrinsic magnetic force of the electromagnetic coil is 
strong, the magnetic member is occasionally influenced by the 
electromagnetic coil, no matter whether the electromagnetic coil is 
energized or not. 
SUMMARY OF THE INVENTION 
In order to obviate the aforementioned problem of the prior art, the 
primary object of the present invention is to provide an improved 
hydraulic magnetic control valve. The present invention is provided with a 
slanted side wall and a movable magnetic member slidable along the slanted 
side wall of the control valve, so as to correctly control the operation 
of the plug of the control valve. 
The other object of the present invention is to provide a hydraulic 
magnetic control valve with advantage of low power consumption during 
operation. In the preferred embodiment of the present invention, the 
slidable magnetic member is dragged by a driving motor positioned on the 
base of the control valve. During both forward or reverse operation of the 
driving motor, it consumes less power energy to operate the control valve. 
Furthermore, once the control valve is in open situation, the driving 
motor is no longer to be energized. Therefore, it is possible to save 
unnecessary electrical power during the open situation of the control 
valve until returning to closed situation. 
To achieve the objects described above, the structure of the preferred 
embodiment in accordance with the present invention includes a base with 
an inlet and an outlet. A plug generally made of rubber material is 
arranged just above the outlet of the base for controlling the hydraulic 
flow. A driving motor serving as a driving device is mounted on the top 
surface of the base. One of the side walls of the base is in a form of a 
slanted side wall, on which a first magnetic member is slidable upward or 
downward along the slanted side wall under drag operation of the driving 
motor. When the first magnetic member slides downward along the slanted 
side wall under control of the motor, the plug together with the second 
magnetic member will move away from the outlet of the base, by way of the 
influence of the first magnetic member, permitting hydraulic material flow 
from the inlet to the outlet of the base. On the contrary, when the first 
magnetic member slides upward along the slanted side wall, the plug will 
cover over the outlet of the base so as to stop up the hydraulic flow.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring now to FIG. 1, a hydraulic magnetic control valve is illustrated 
in accordance with the present invention, illustrating the control valve 
is in closed situation. The control valve is adapted to control the flow 
of hydraulic material, such as water. The control valve as shown comprises 
a base 2 with an inlet 21 and an outlet 22, providing flowing path for the 
hydraulic material. In the inner space of the control valve, there is 
provided with a plug 5 for permitting or stopping the water flow from the 
inlet to the outlet. Commonly, the plug 5 is made of rubber material. In 
the closed situation as shown in the figure, the plug 5 tightly covers 
over the opening of the outlet 22, so as to stop up the water flow. 
In case that the plug 5 is in open situation, as shown in FIG. 2, the water 
flow (as shown by solid line arrow in the drawing) may enter from the 
inlet 21 into the inner space of the base 2, and then flow to the outlet 
22. That is, it is possible to control the water flow by means of 
controlling the position of the plug 5. 
In order to control the operation of the plug, the present invention is 
provided with a first magnetic member 3 and a second magnetic member 4. 
The second magnetic member 4 is rigidly attached to the top surface of the 
plug 5, forming a unitary element in structure and in operation. In this 
preferred embodiment, the magnetic pole of the second magnetic member 4 is 
negative pole. The right end portion of the magnetic member 4 has a pivot 
axis 61. The inner wall of the base 2 extends a horizontal supporting rod 
6 corresponding in position to the pivot axis 61 of the second magnetic 
member 4, so that the magnetic member 4 may be supported by the rod 6 in 
position above the outlet 22 and pivotally rotate around the pivot axis 61 
acting as a rotating center. In such arrangement, the plug 5 may open or 
cover over the outlet 22. 
One of the side walls of the base 2 is in a form of slanted side wall 23. 
The first magnetic member 3 is positioned on the slanted side wall 23. The 
outlet 22 of the control valve is formed beneath the slanted side wall 23, 
so that the plug 5 is correspondingly arranged adjacent to the interior 
side of the slanted side wall 23. 
A driving device 1 is mounted on the top surface of the base 2 of the 
control valve, serving as an actuator used to move the first magnetic 
member 3 along the slanted side wall 23 upward or downward. In the 
preferred embodiment of the present invention, the driving device is a 
miniature D.C. driving motor. It is to be understood that the driving 
device may be replaced with the other driving device, such as a solenoid. 
The first magnetic member 3 may be slidable upward or downward along the 
slanted side wall 23 by the driving motor 1 via a drag rope 11. One end of 
the drag rope 11 is connected to the first magnetic member 3, and the 
other end of the drag rope is wound onto the rotation rod of the driving 
motor 1. In case that the driving motor 1 is replaced with a solenoid 
actuator, the drag rope 11 may be a drag rod. 
The first magnetic member 3 is of the type of positive pole for the purpose 
of reversal matching with the negative magnetic pole of the second 
magnetic member 4. 
In open operation of the control valve, referring to FIG. 2, the power line 
A of the driving motor 1 is connected to a positive voltage while the 
other power line B of the driving motor 1 is connected to a negative 
voltage. In such a power connection, the driving motor 1 rotates in 
forward direction, causing the drag rope 11 to be extent by the gravity of 
the first magnetic member 3, and at the same time the first magnetic 
member 3 slides downward along the slanted side wall 23. When the first 
magnetic member 3 slides downward closed to the lower section of the 
slanted side wall 23, the magnetic force generated by the first magnetic 
member 3 will influence the second magnetic member 4. Finally, the plug 5 
together with the second magnetic member 4 will be moved away from the 
outlet 22 and attached to the interior side of the slanted side wall 23 by 
the magnetic force of the first magnetic member 3. At this situation, the 
water flow may freely flow to the outlet from the inlet of the control 
valve. 
In closed operation of the control valve, the power line A of the driving 
motor 1 is connected to a negative voltage while the other power line B of 
the driving motor 1 is connected to a positive voltage, so that the 
driving motor 1 rotates in reversed direction, causing the drag rope 11 to 
be rewound onto the rotation shaft of the driving motor 1. At the same 
time, the first magnetic member 3 slides upward along the slanted side 
wall 23. When the first magnetic member 3 slides upward from the lower 
section to the upper section, the magnetic force generated by the first 
magnetic member 3 will loss its influence with respect to the second 
magnetic member 4. Therefore, the plug 5 drops and covers over the outlet 
again to stop up the water flow. 
The slanted side wall 23 of the preferred embodiment of the present 
invention described above is in the form of a smooth sloped plate. 
Obviously, it is possible to mount two vertical guide plates both on the 
two edge sides of the slanted side wall 23. The function of the guide 
plates is to guide the first magnetic member 3 to prevent swing movement 
of the first magnetic member 3 during sliding operation. 
From the detailed description above, it is to be understood that the 
present invention has advantage of low power consumption. The reasons are 
as follows: 
1. The driving motor needs only few power connection time, normally 0.5 
second, during both forward or reversed operation. 
2. In open operation of the control valve, the plug first moves away from 
the outlet of the control valve, then the water flow continuously flows 
from inlet to outlet of the base of the control valve. At this time, the 
first magnetic member and the second magnetic member are magnetically 
associated by the magnetic force therebetween, remaining the control valve 
in open situation. That is, once the second magnetic members is in open 
situation, the driving motor is not necessary to be energized any more. In 
performance of the closed operation of the control valve, simply reversal 
rotating the driving motor to drag up the first magnetic member, the plug 
will immediately cover over the outlet of the control valve to stop up the 
water flow. 
The present invention is apparent from the above detailed description. Many 
changes and modifications in the above described embodiment of the 
invention can be carried out without departing from the scope thereof. 
Accordingly, the present invention is disclosed and is intended to be 
limited only by the scope of the appended claims.