JP2571089Y2 - Switching valve - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application field] The present invention relates to the valve body
Stacking with supply and discharge ports penetrating through
The present invention relates to a switching type switching valve.

[0002]

2. Description of the Related Art In order to collectively supply and discharge pressure fluid to a plurality of switching valves, these switching valves are installed on an integral manifold base having a supply passage and a discharge passage for the pressure fluid. Or, or installed on each sub-plate having a supply flow path and a discharge flow path that communicate with each other by continuous connection, to connect a plurality of these sub-plates,
It is already known without particular examples. However, when a plurality of switching valves are installed on the manifold base or the sub-plate, it takes time and effort to install the switching valve, and the manifold base or the sub-plate increases the space in the height direction of the switching valve. There is.

In order to solve this problem, there has been proposed a stacking type switching valve having a valve body provided with a supply port and a discharge port penetrating in a continuous direction. This switching valve is
Since the manifold base and the sub-plate are not used, there is an advantage that there is no need to install a switching valve and the space in the height direction can be reduced, but the fluid flowing through the supply port and the discharge port penetrating through the valve body is Since the lubricant such as grease applied to the valve element is blown off by the fluid because it flows across the valve hole, there is a new problem that the life of the switching valve is shortened due to poor lubrication of the valve element.

[0004]

A problem to be solved by the present invention is to provide a switching valve which does not require the use of a manifold base or the like and has a long life.

[0005]

In order to solve the above-mentioned problems, a switching valve according to the present invention is provided with a pair of oppositely-facing opposite sides.
The valve body with the connecting surface is connected to each other between the connected valve bodies.
Supply port and discharge port for the pressurized fluid passing therethrough, and the valve body
Independent output ports for each and these ports open
A valve hole parallel to the connection surface is provided, and an output port is provided in the valve hole.
To switch the port between the supply port and the discharge port
Are slidably inserted, and these valve bodies are
A switching valve that is used in series with the valve body.
Supply and discharge ports for pressure fluid
Corresponding to the depth of the valve hole.
These recesses allow these ports to be individually valved.
And open these ports in the valve hole.
Behind the mouth position, block fluid from flowing across the valve hole
Provide a partition to stop, the supply port and the discharge port,
In the position that does not cross the valve hole,
It is characterized by passing through.

[0006]

When a plurality of switching valves are connected in series with their connecting surfaces in contact with each other, a supply port and a discharge port penetrating the valve body communicate with each other in the connecting direction. Even if not used, the pressurized fluid can be supplied and discharged to and from a plurality of switching valves connected in series. In this case, since the supply port and the discharge port are made to penetrate the valve body at a position displaced from the opening position to the valve hole, the fluid flowing through these ports does not flow across the valve hole. The scattering of the lubricant is reduced, and the life of the switching valve can be extended.

Further, since the output port is opened on one side surface of the valve body, piping to the output port is easier than in the case where the output port is opened on the upper surface of the valve body. Space in the height direction can be reduced.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention.
The pilot valve is provided with a main valve 1 and a pilot valve 2. However, the switching valve of the present invention
The invention is not limited to the pilot type valve, and the valve body may be operated by another operation force such as a solenoid or a mechanical operation force.

The valve body 4 of the main valve 1 has a pair of opposed connecting surfaces 4a, 4b facing each other. The connecting surface 4a has a supply port P for pressure fluid, output ports A, B, and a discharge port EA, E
The concave portion constituting B is formed in the continuous surface 4b with a similar concave portion having substantially the same shape and a small depth, and when the continuous surfaces 4a and 4b of the valve bodies 4 and 4 are brought into contact with each other, these concave portions are formed. Each port is formed by the concave portion. The ends of these ports individually communicate with a valve hole 5 formed in a direction substantially perpendicular to the direction in which the valve body 4 is provided, and the output ports A and B are connected to the connecting surface 4a by an output flow path described later. , 4b are individually opened on one side surface 4c which is substantially perpendicular to them. A gasket 6 for airtightly partitioning these ports is attached to the continuous surface 4b. However, the recesses constituting each of the ports may be formed only on the continuous surface 4a.

The valve body 4 has a piston chamber 7 having a larger diameter than the valve hole at one end of the valve hole 5, and a valve element 9 slidably inserted into the valve hole 5 slides through the piston chamber 7. Of the pilot pressure acting on the piston 8 and the force of the fluid pressure supplied from the back chamber port 11 to the back chamber 10 on the opposite side of the piston. To
It is configured as a spool that switches and communicates with the supply port P and the discharge ports EA and EB. Further, the valve body 4 has substantially U-shaped continuous grooves 13 on its upper surface and lower surface, and a desired tie rod and nut (both not shown) are inserted through these continuous grooves. Several units can be installed. However, the connecting means of these valve bodies is not limited to the tie rod and the nut.

The supply port P and the discharge ports EA, E
B, and individually provided on the connecting surface 4 a of the valve body 4.
The recess has a depth that reaches the valve hole 5.
Recesses allow these ports to communicate with valve holes
However, the opening positions of these ports in the valve hole 5
Behind the valve prevents fluid from flowing across the valve hole 5
3 is formed integrally with the valve body 4 (FIG. 3).
A to c). And the above-mentioned supply port P and discharge
Ports EA and EB are positioned so as not to cross valve hole 5.
That is, in the figure, is the position of the port opening in the valve hole
In the direction in which the valve body 4 is connected
Penetrated. The back chamber port 11 penetrates in the direction in which the valve main body 4 is connected, and is supplied with a supply fluid through a passage (not shown). On the other hand, the output ports A and B are opened on the one side (the side opposite to the pilot valve 2) 4c of the valve body 4 by the output passages 16a and 16b, and are opened on the side 4c of the output passages 16a and 16b. A so-called one-touch fitting 17, 17 is detachably attached to the portion by a substantially U-shaped fitting 19 inserted into a fitting groove 18 provided in the valve body 4.

The pilot valve 2 has a pilot supply port, a pilot output port, and a pilot discharge port (all are not shown). When the solenoid 2a is energized and released, the pilot output port is connected to the pilot supply port and the pilot discharge port. The pilot supply port is connected to a fluid pressure source such as the supply port P of the main valve 1, the pilot output port is connected to the piston chamber 7 through the pilot passage 20, and the pilot discharge port is connected. The ports communicate with the outside.

A manual operation unit 21 for supplying a pilot fluid to the piston chamber 7 in the event of an accident such as a power failure is mounted between the main valve 1 and the pilot valve 2. When the provided manual operation button 22 is pressed, a pilot fluid can be supplied to the piston chamber 7.
Although the above embodiment is a five-port valve, the switching valve of the present invention is not limited to the five-port valve, but may be a three-port valve or a four-port valve.

In the above embodiment, the continuous groove 1 provided in the valve body 4 is provided.
By inserting tie rods through the openings and tightening the nuts to 3, 13, a desired number can be continuously provided,
The supply port P, the discharge ports EA and EB, and the back chamber port 11 communicate with each other by the continuous connection. Therefore, compressed air can be supplied and discharged to these ports at once without using a manifold base or the like.

In the above embodiment, when the pilot fluid is not supplied to the piston chamber 7, the valve body 9 moves leftward in the drawing due to the fluid pressure acting on the back chamber 10, and the supply port P and the discharge port B , And the output port A communicates with the discharge port EA (see the lower half of FIG. 1). The excitation of the solenoid 2a causes the pilot valve 2 to move from the piston chamber 7
When the pilot fluid is supplied to the valve, the valve element 9 moves to the right in the figure, and the supply port P communicates with the output port A, and the output port B communicates with the discharge port EB (see the upper half of FIG. 1). When the excitation of the solenoid 2a is released and the air in the piston chamber 7 is discharged to the outside, the air pressure acting on the back chamber 10 causes the valve body 9 to return to its original state. In this case, the fluid flowing in the direction in which the supply port P and the discharge ports EA and EB are continuously connected to each other is such that these ports move the through position of the valve body 4 through which the fluid flows and the opening position to the valve hole 5 in the vertical direction in the figure. Displacement and the formation of the partition walls 14,... On the connecting surface 4b side of the valve hole 5 for preventing the fluid from flowing across the valve hole 5, so that the fluid does not flow in the radial direction of the valve hole 5. In addition, since the scattering of the lubricant applied to the seal ring of the valve body 9 can be extremely reduced, the life of the switching valve can be reduced while having the supply port P and the discharge ports EA and EB which are mutually connected by the continuous connection. Can be longer.

Since the output ports A and B are opened on one side surface 4c orthogonal to the connecting surfaces 4a and 4b of the valve body 4,
Since piping to these ports is easy and no space is required for piping connection, space in the height direction for installing the switching valve can be reduced.

[0017]

According to the present invention, the switching valve is provided at a position where the supply port and the discharge port, which are communicated by connecting the valve body, are displaced from the opening position to the valve hole in a direction substantially parallel to the connecting surface. Since the body penetrates, the fluid flowing in these ports in the connecting direction does not directly flow through the opening to the valve hole, so that the scattering of the lubricant applied to the sliding portion such as the valve body is reduced, The life of the switching valve can be extended. Also,
Since the output port is opened on one side of the valve body, piping can be connected to the output port from the side of the switching valve, so that connection of the piping is easy and space in the height direction for installation can be reduced. .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a main part of an embodiment.

FIG. 2 is a rear view of the same.

FIG. 3 is a cross-sectional view taken along line II-II, line II-III, and line III-III of FIG. 1;

FIG. 4 is a plan view of the embodiment.

[Explanation of symbols]

 4 Valve body 4a, 4b Connecting surface 4c Side surface 5 Valve hole 9 Valve body P Supply port A, B Output port EA, EB Discharge port

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeshi Arakawa 4-2-2 Kinnodai, Yawahara-mura, Tsukuba-gun, Ibaraki Pref. SMC Corporation Tsukuba Technical Center (56) References U) Tokiko 46-35306 (JP, B1)

Claims (2)

(57) [Scope of request for utility model registration] A pair of connecting surfaces facing each other are provided on both side surfaces.
Pressure between the valve bodies connected to each other
Separate fluid supply and discharge ports for each valve body
Output ports and the connecting surfaces where these ports open
And an output port in the above-mentioned valve hole.
The valve to switch between the port and the discharge port can slide.
And connect the valve bodies in sequence with the connecting surface.
A switching port for supplying a pressure fluid supply port and a connecting port to the connecting surface of the valve body.
Corresponding to the valve port and the discharge port
Are provided separately and these recesses
Are respectively connected to the valve holes, and
Behind the port opening position, fluid crosses the valve hole
Provide a partition to prevent the flow, and connect the supply port and the discharge port so that they do not cross the valve hole.
A switching valve, wherein the switching valve is penetrated in a direction in which the valve body is connected . 2. A method for opening an output port in a valve body.
The switching valve according to claim 1, wherein the switching valve is opened at one end face of the switching valve.