JPH0154591B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement of a solenoid valve that opens and closes a fluid passage depending on the presence or absence of electricity, and an object of the present invention is to provide a solenoid valve that can easily switch the fluid passage even in the event of a failure. There is.

It is common practice to install solenoid valves in the middle of fluid passages (hereinafter referred to as flow passages) that transfer various types of fluids, but conventional solenoid valves do not allow the passage to be opened or closed from the outside in the event of a failure. I couldn't do it at all. For this reason, when switching the flow path as an emergency repair in the event of a solenoid valve failure, it is necessary to remove the solenoid valve that was attached in the middle of the flow path and directly connect the pipes that make up the flow path ( (If the solenoid valve fails while it is closed) or the end of the piping is blocked (also if it fails while it is open). However, such work is not only difficult to perform when the solenoid valve is installed in a narrow space, but also is not preferable because the fluid sent through the flow path may leak during the work.

The electromagnetic valve of the present invention has a connecting part for connecting the end of a pipe for transferring fluid and an opening/closing part for switching the flow path using a solenoid, which are separate parts, and both are rotatably coupled. In the event of a failure, the opening/closing part is rotated by a predetermined angle with respect to the connecting part, so that the fluid passage leading to the connecting part can be switched, thereby solving the above-mentioned inconvenience.

Hereinafter, the present invention will be explained in more detail with reference to drawings showing examples.

1 to 3 show a first embodiment of the solenoid valve of the present invention. This electromagnetic valve 1 includes a connecting part 2 for connecting the respective ends of an inflow pipe and an outflow pipe of fluid.
and an internal solenoid 3, and this solenoid 3
The opening/closing section 4 opens and closes the flow path depending on whether or not electricity is applied to the opening/closing section 4. A cylindrical part with an inlet 5 and an outlet 6 inside is formed at both ends of the connecting part 2, and between the two cylindrical parts, the upper surface is flat and a circular hole 1 is formed in the center.
1 is formed. One ends of first and fourth passages 8 and 9, which communicate with the inlet 5 and the outlet 6, respectively, are opened at both ends of the upper surface of the base plate 7, and an annular shape is formed around the openings of both passages 8 and 9. Packing 10 is installed.

On the other hand, the opening/closing part 4 incorporating the solenoid 3 is a cylindrical body in which the solenoid 3 is housed between an inner cylinder 15 and an outer cylinder 16 on the upper side of a base 14 that has a second passage 12 and a third passage 13 inside. 17 is fixed, and a valve body 18 made of iron is inserted into the inside of this cylinder 17 so as to be movable up and down, and furthermore, a lid 19 is attached to the upper surface of this cylinder 17. A first valve seat 20 is provided at the opening of the second passage 12 at the upper end of the base body 14, and the upper end opening of the third passage 13 is opened through a gap passage 21 between the base body 14 and the cylindrical body 17. cylindrical body 17
It communicates with a space 22 in which a valve body 18 is provided. The outer peripheral surface of the valve body 18 vertically movably inserted into this space 22 has grooves 23, 23 extending vertically.
is formed, and packings 24, 24 are attached to both the upper and lower end surfaces, respectively. The valve body 18 is always pressed upward by a compression spring 25 provided between the lower surface of the valve body 18 and the upper surface of the base body 14. On the other hand, a through hole 26 is bored in the center of the lid body 19.
A second valve seat 27 is formed at the periphery of the lower end opening. Further, inside the base body 14, apart from the second and third passages 12 and 13, a fifth passage 28 as shown in FIG. 3 is provided. This fifth passage 28
is formed at a twisted position with respect to each of the second and third passages 12 and 13, and the base body 14
The interval between the openings at both ends opened on the lower surface is made equal to the width between the lower end opening of the second passage 12 and the lower end opening of the third passage 13. 29 is a conducting wire for supplying electricity to the solenoid 3.

The connecting portion 2 and the opening/closing portion 4 configured as described above are constructed by inserting a bolt 30 projecting downward from the center of the lower surface of the base 14 of the opening/closing portion 4 into the circular hole 11 at the center of the base plate 7 of the connecting portion 2. By screwing a nut 31 into the lower end of the bolt 30 protruding downward from the base plate 7, it is assembled and used as shown in FIG.

Next, the operation of the solenoid valve 1 of the present invention constructed as described above will be explained.

First, if there is no failure in the solenoid valve, as shown in FIG.
2, and the upper end opening of the fourth passage 9 and the lower end opening of the third passage 13 are aligned, and the connecting part 2 and the opening/closing part 4 are combined, and the nut 31 is tightened. I'll keep it. When the solenoid valve 1 is now in an open state and the inlet 5 and outlet 6 are to be communicated, the solenoid 3 is not energized. Therefore, the valve body 18 in the opening/closing part 4 is pushed up by the elasticity of the compression spring 5, and the packing 24 on the upper end surface of the valve body 18 is pressed against the second valve seat 27, thereby blocking the inside of the space 22 and the outside air. At the same time, the packing 24 on the lower end surface separates from the first valve seat 20, allowing the second passage 12 and the space 22 to communicate. Therefore, the fluid flows from the inlet 5 through the first and second passages 8 and 12 into the space 22.
Then, the gap passage 21 and the third passage 1
3. It is sent to the outlet 6 through the fourth passage 9. In addition, when the solenoid valve 1 is closed and the inlet 5 and outlet 6 are cut off, the solenoid 3 is energized,
The valve body 18 is pulled down against the elasticity of the compression spring 25. As a result, the packing 24 on the lower end surface of the valve body 18 comes into contact with the first valve seat 20, and the second passage 12
By cutting off the communication between the inlet 5 and the inside of the space 22.
and the outflow port 6. In this state, in the illustrated embodiment, the packing 24 on the upper end surface of the valve body 18 separates from the second valve seat 27, so the outlet 6 is located between the fourth passage 9, the third passage 13, and the gap. Passage 2
1. It is opened to the atmosphere through the space 22, the groove 23 on the outer peripheral surface of the valve body, and the through hole 26.

If the solenoid valve 1 has no failure and operates normally, it will work as described above, but then the valve body 18
If the inflow port 5 and the outflow port 6 remain cut off due to breakage of the compression spring 25 that compresses the inlet 5 and the outflow port 6, an operation for making the two ports 5 and 6 communicate with each other in an emergency will be described. In this case, first loosen the nut 31 fixing the opening/closing part 4 to the connecting part 2 so that it can rotate relative to the opening/closing part 4 and the connecting part 2. Next, the opening/closing part 4 is rotated by a predetermined angle with respect to the connecting part 2 around the bolt 30,
The openings at both ends of the fifth passage 28 are aligned with the openings at the upper ends of the first and fourth passages 8 and 9, respectively. Once each opening is aligned, tighten the nut 31 again.
In order to rotate the opening/closing part 4 by a predetermined angle with respect to the connecting part 2 in this way and ensuring the above-mentioned alignment, a mechanism or a click is provided between the opening/closing part 4 and the connecting part 2 to regulate the rotation angle. A mechanism may also be provided. In this way, when the openings at both ends of the fifth passage 28 are aligned with the openings at the upper ends of the first and fourth passages 8 and 9,
The inflow port 5 and the outflow port 6 are the above-mentioned passages 8, 28, 9.
The fluid can be sent from the inlet 5 to the outlet 6 regardless of the position of the valve body 18.

In the above explanation, we have explained the case where the electromagnetic valve fails while it is closed, but due to the conductor 29 being cut, etc., the valve body 18 remains pushed up, and the inlet port 5 and Even if it becomes impossible to shut off the outlet 6, by rotating the opening/closing part 4 with respect to the connecting part 2, communication between the two ports 5 and 6 can be easily cut off.
That is, in this case, the angle at which the opening/closing part 4 is rotated is slightly different so that the upper end openings of the first and fourth passages 8 and 9 do not align with any of the second, third, and fifth passages. good. In this way, the angle adjustment for blocking the inlet 5 and the outlet 6 can be easily performed by providing a click mechanism between the opening/closing part 4 and the connecting part 2.

Furthermore, as in the illustrated embodiment, the inlet 5
When communication between the outlet 6 and the outlet 6 is cut off, the outlet 6
If it is necessary to open the air to the atmosphere, as shown in FIG. 4 showing the second embodiment, a short-circuit passage 32 is provided in the base 14 of the opening/closing part 4, with both ends opening to the bottom and side surfaces of the base 14. When the upper end opening of the first passage 8 leading to the inlet 5 is closed, the lower end opening of this short circuit passage 32 may be aligned with the upper end opening of the fourth passage 9 leading to the outlet 6.

In addition, a fifth passage 28 is formed in the base body 14 of the opening/closing part 4 to communicate the inlet 5 and the outlet 6 as shown in FIG. 3, or a short-circuit passage is formed in which only the outlet 6 is opened to the atmosphere. 32 or solenoid valve 1
stipulates that in the event of a breakdown, emergency repairs can be made to obtain the minimum necessary condition. That is, if the minimum functionality of the device provided with the solenoid valve 1 can be obtained as long as the inlet 5 and outlet 6 are in communication even if the solenoid valve 1 fails, then the system as shown in FIG. forming five passages 28;
On the other hand, if it is necessary to close the inlet 5 and open the outlet 6 to the atmosphere, a short-circuit passage 32 as shown in FIG. 4 is formed. Furthermore, when it is necessary to switch between a state where the inlet 5 and the outlet 6 are in communication with each other and a state where the inlet 5 is closed and the outlet 6 is opened to the atmosphere, the first and fourth passages 8 , 9, both the fifth passage 28 and the short-circuit passage 32 may be formed in the base body 14 at different angles. In this case, for example, if the opening/closing part 4 is rotated by 45 degrees (the angle is not particularly limited) from the state shown in FIG. The outlet 6 is open to the atmosphere, and
When it is rotated 45 degrees for a total of 90 turns, the inlet 5 and the outlet 6 are communicated with each other through the fifth passage 8 shown in FIG.
Such adjustment of the rotation angle can also be done by connecting part 2 and opening/closing part 4.
This can be easily done by adding a click mechanism between the two.

In order to regulate the rotation angle of the opening/closing part 4 with respect to the connecting part 2, a circular hole 11 is formed in the upper surface of the base plate part 7 of the connecting part 2, as shown by chain lines in FIGS. 2 and 4, for example.
An arcuate groove 33 is formed with the center at Connect the opening/closing part 4 to the connecting part 2 within the movable range.
It may also be possible to rotate with respect to. In addition, in order to easily rotate the opening/closing part 4 in a narrow space, a bolt 3 fixed to the base 14 is provided.
It is also possible to provide a cutout 35 on the end face of 0. When rotating the opening/closing part 4, engage the tip of a screwdriver within this cutout 35 and twist the bolt 30.
The opening/closing part 4 can be easily rotated even in a narrow place where hands cannot reach.

Since the electromagnetic valve of the present invention is configured and operates as described above, it is possible to easily and quickly switch the flow path in the event of a failure, and the fluid in the flow path will not leak during the switching operation.

[Brief explanation of drawings]

The drawings collectively illustrate embodiments of the invention. 1st
The figure is a vertical side view showing the overall configuration, Figure 2 is a plan view of the connecting part, and Figure 3 is A-A in Figure 1 showing the opening/closing part.
FIG. 4 is a longitudinal sectional view showing another example of the base of the opening/closing part. 1: Solenoid valve, 2: Connection part, 3: Solenoid,
4: Opening/closing part, 5: Inlet, 6: Outlet, 7: Substrate part, 8: First passage, 9: Fourth passage, 10: Packing, 11: Circular hole, 12: Second passage, 13: Fourth passage Three passages, 14: Base, 15: Inner cylinder, 16: Outer cylinder, 1
7: Cylindrical body, 18: Valve body, 19: Lid body, 20: First valve seat, 21: Gap passage, 22: Space, 23: Groove,
24: Packing, 25: Compression spring, 26: Through hole, 27: Second valve seat, 28: Fifth passage, 29: Conductor, 30: Bolt, 31: Nut, 32: Short circuit passage, 33: Concave groove, 34 : Pin, 35: Cut.

Claims (1)

[Claims] 1. A circular hole 1 is provided in the center between an inlet 5 that connects the end of the inflow pipe and an outlet 6 that connects the end of the outflow pipe.
One end of a first passage 8 communicating with the inlet 5 and a fourth passage 9 communicating with the outlet 6 are respectively opened on the upper surface of the substrate part 7 of the connecting part in which the substrate part 7 with the hole 1 is formed. The opening/closing part 4, which is rotatably connected to the upper surface of the part 7 by a bolt 30 inserted into the circular hole 11, has a flow passage opening/closing mechanism using a solenoid 3 connected to the upper part of a base body 14 having a fluid passage therein. The lower surface of the base body 14 has second and third passages 12 and 1 provided in series with this flow passage opening/closing mechanism.
3 is opened at the same interval as the end openings of the first and fourth passages 8 and 9, and
The solenoid valve 4 has another passage inside thereof that communicates with at least one of the first and fourth passages 8 and 9 of the connection part 2 when the opening/closing part 4 is rotated with respect to the connection part 2. 2. Claim 1 in which the other passage is a fifth passage 28 that directly communicates the first and fourth passages 8 and 9.
Solenoid valve described in section. 3. The electromagnetic valve according to claim 1, wherein the other passage is a short-circuit passage 32 that allows only the fourth passage 9 to communicate with the atmosphere. 4 Another passage selectively communicates with at least one of the first and fourth passages 8 and 9 depending on the rotation angle of the opening/closing part 4 with respect to the connecting part 2; The electromagnetic valve according to claim 1, wherein the solenoid valve is a short-circuit passage 32 that allows only the fifth passage 28 and the fourth passage 9 to communicate with the atmosphere.