JP2547957Y2 - Manifold unit - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a pilot type fluid valve.
The engagement respectively mountable to the structure with the manifold body to multiple connecting the manifold unit, in particular, a common exhaust passage communicating between adjacent manifold body, a pilot communicating between said common exhaust <br/> passage and the fluid valve The present invention relates to a manifold unit provided with a backflow prevention unit between the manifold unit and an exhaust passage .

[0002]

2. Description of the Related Art A plurality of directional control valves mounted on a manifold unit are connected to cylinders each having a built-in piston. High-pressure fluid from a fluid supply source is supplied to a common supply formed in the manifold unit. It is configured to be supplied from a passage to the cylinder via the direction control valve. In such a configuration, when one directional control valve operates and starts supplying high-pressure fluid to the cylinder, the pressure in the common supply passage decreases instantaneously, and the supply of high-pressure fluid via the other directional control valve is performed. The pressure in the other cylinders also drops transiently. Here, if the tightening or holding operation is performed by the other cylinder with a predetermined force, for example, the decrease in the force due to the decrease in the pressure has hindered the function of the device using the cylinder.

Further, the exhaust fluid in the cylinder opposite to the piston is returned to a common exhaust passage formed in the manifold unit via a direction control valve, and is discharged to outside air via a silencer. ing. Also in such a configuration, the operation of one directional control valve system transiently affects the other directional control valve systems, as described above. In particular, when the directional control valve is a pilot type directional control valve,
In many cases, the exhaust of the pilot valve is made common to the common exhaust passage of the direction control valve, and the exhaust is collectively exhausted by the common exhaust passage. In such a configuration, the exhaust of one directional control valve may flow backward through the exhaust passage of another pilot valve, thereby causing a malfunction of the other directional control valve and causing serious control problems. there were.

In Japanese Patent Application Laid-Open No. 52-138724 and Japanese Utility Model Application Laid-Open No. 55-97264, a tongue-shaped backflow preventing means is provided on a plate-like packing sandwiched between a directional control valve and a manifold body. Technology is shown. But,
In this plate-shaped packing, a number of holes such as a supply passage, an exhaust passage, and a screw hole for mounting a valve body are opened, and in particular, a small directional control valve, or a supply passage, an exhaust passage, and a breathing passage for a pilot. When this prior art is applied to a pilot type directional control valve which must be provided, the intervals between individual holes are narrowed, and it is difficult to provide a backflow preventing means comprising a tongue piece. Further, when the normal flow of the fluid is in the direction from the directional control valve to the manifold body, for example, in the exhaust passage, the valve seat of the backflow prevention means must be secured in the directional control valve. Must remain uncertain or have to re-install the valve seat,
There was a lack of versatility.

[0005] In the actual fair No. 2-18387, have been shown art in which a backflow preventing means in the middle of the pilot exhaust passage in the valve body, added to internal anti-reflux means in a narrow space Engineering It is necessary to prepare a dedicated valve body as described above, and it is often difficult to provide a reliable backflow preventing function in this narrow space, and it is necessary to secure a considerable space. This has not only led to an increase in the size of a single switching valve, but also caused an increase in the size of a manifold on which the switching valve is mounted.

[0006]

SUMMARY OF THE INVENTION In view of the drawbacks of the prior art, the present invention provides backflow preventing means without restriction on the size of the fluid valve and without increasing the volume of the manifold body. It is an object of the present invention to provide a manifold unit capable of eliminating a transient influence due to the operation of another fluid valve system. Another object of the present invention is to provide a manifold unit in which the backflow preventing means can be effectively and simply arranged.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a pilot method.
In a manifold unit formed by connecting a plurality of manifold bodies each configured to be capable of mounting a type fluid valve, a common exhaust passage for communicating between adjacent manifold bodies,
A communication chamber provided at the joint surface between the manifold bodies;
The pilot that communicates with the communication / exhaust passage through the communication chamber;
And the communication chamber
At the same time, from the common exhaust passage to the pilot exhaust passage.
A backflow preventing means for preventing backflow is provided.

[0008] Further, the backflow preventing means is formed in a packing formed on the joint surface of the manifold main body, and the pilot exhaust formed in the manifold main body.
Composed with a valve seat formed at the opening of the passage
This is also an effective means of the present invention.

[0009]

According to the present invention, as shown in FIGS.
Exhaust passage (2
d ', 2e') and the joint surface between the manifold bodies
To the communication chambers (2G, 2F) and the common exhaust passage.
Pi of the pilot type fluid valve communicating through a communication chamber
Lot exhaust passages (2g, 1g), (2f, 1f),
From the common exhaust passage, the pilot
Backflow prevention means for preventing backflow to the exhaust passage (tongue valve)
2Cf and 2Cg are provided.

Therefore, the adjacent manifold body is cut off.
Pressure in the common exhaust passage in a transient state due to a switching operation
Backflow of fluid to the pilot exhaust passage due to increase in force
Is completely prevented by the backflow prevention means. Soshi
The backflow prevention means includes a manifold connected to the switching valve 1.
Less than the number of various openings to be opened on the surface of the
The mouth is provided at the joint surface between the opened manifold bodies.
Since it is arranged in the communication chamber (2F, 2G), the fluid valve
The size of the manifold is not restricted
Backflow prevention means can be provided without increasing the volume.
Wear.

The backflow preventing means may be a manifold main body.
Valve body formed on a packing interposed at the joint surface of the body
And the pilot exhaust formed in the manifold body
Composed with a valve seat formed at the opening of the passage
In this case, the valve seat is connected to the manifold connected to the switching valve 1.
Openings smaller than the number of various openings formed on the surface of the door body 2
Section is provided on the joint surface between the opened manifold bodies.
Therefore, there is no restriction on the size of the fluid valve and
Without increasing the volume of the manifold body
The valve body is molded with self-return
If more than one valve seat is provided,
Economic be formed form a plurality of valve body 1 parts corresponding to the valve seat
A simple valve body can be provided.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; However, unless otherwise specified, dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. Not just.

FIG. 2 is an overall configuration diagram of a manifold valve according to an embodiment of the present invention. 1 is a plurality of switching valves for changing the direction of fluid, 2 is a manifold unit on which the switching valve 1 is mounted, and a plurality of manifolds. It comprises a main body 2A and a mounting base 2B for holding the manifold main body 2A in the communication hole 2k from both ends by connecting screws .

FIG. 4 shows the switching valve 1 according to an embodiment of the present invention.
Is a cross-sectional view showing an internal configuration of the internal pilot type, illustrating an internal pilot type 5-port 2-position switching valve. The switching valve 1 includes a supply passage 1a, switching passages 1b and 1c, exhaust passages 1d and 1e, and pilot exhaust passages 1f and 1g.

FIG. 3 is a block diagram of the manifold unit 2 according to the present invention. The unit 2 includes supply passages 2a, switching passages 2b, 2c, corresponding to various passages of the switching valve 1.
A plurality of manifold bodies 2A having exhaust passages 2d and 2e and pilot exhaust passages 2f and 2g opened; and a common supply port 2B at both ends of the manifold unit 2.
a, a manifold mounting base 2B provided with a common exhaust port 2Bde. 2j is the switching valve 1
Are screw holes for fixing to the manifold main body 2.

FIG. 1 is a detailed view of the manifold body 2A according to the present invention. The manifold body 2A has a common supply passage 2a 'and a common exhaust passage 2 which are formed in the connecting direction.
d 'and 2e' are provided. The common supply port 2Ba (see FIG. 3) of the mounting base 2B is connected to the common supply path 2Ba.
a ', the supply passage 2a of each manifold body 2A, the supply passage 1a of each switching valve 1, and the common exhaust port 2Bde is also branched in the mounting base 2B in the same manner. It communicates with the exhaust passage 1e. The manifold body 2A is provided with switching ports 2b 'and 2c', respectively, and
b, 2c communicates with the switching passages 1b, 1c of the switching valve 1.

On one joint surface of the manifold body 2A, communication chambers 2F and 2G are provided.
Are provided with valve seats 2F1 and 2G1, respectively.
The openings of the exhaust passages 2f 'and 2g' are opened in 1 and 1G1.
I do. The exhaust passages 2f ', 2g ' communicate with pilot exhaust passages 1f, 1g (FIG. 4) of the switching valve 1. A packing 2C for sealing the common supply passage 2a 'and the common exhaust passages 2d', 2e 'is sandwiched on the joint surface of the manifold body 2A, and tongue-shaped valve bodies 2Cf, 2Cg are formed integrally with the packing 2C. And the valve seats 2F1, 2F
Backflow prevention means X1 and X2 are formed which abut against G1 and prevent backflow from the common exhaust passages 2d 'and 2e' to the exhaust passages 2f 'and 2g'.

FIG. 5 is a cross-sectional view showing the entire structure of the backflow prevention means X1 'according to another embodiment of the present invention. A valve seat 2F'1 is provided in a communication chamber 2F' communicating with a common exhaust passage 2d '. ,
A valve chamber 2F3 concentrically opposed to the valve seat 2F'1 is provided in an adjacent manifold body, and a spring 2 is provided in the valve chamber 2F3.
F4 and the valve body 2F2 are fitted, and the valve body 2F2 and the valve seat are fitted.
Connect the manifold body so that 2F'1 abuts,
A backflow prevention means X1 'for preventing backflow from the common exhaust passage 2d' to the pilot exhaust passage 2f is formed.

Next, based on the device circuit diagram of FIG. 6, the device configuration and operation of the present invention will be described. V1 and V2 in the figure are internal pilot type 5 port 2 position switching valves, 2A1, 2
A2 is a manifold body on which the switching valve is mounted, 2B is a mount for the manifold body, and P1 and P2 are cylinders connected to the switching valve.

FIG. 6 shows an initial state, in which the switching valves V1 and V
2 shows a state in which an electrical signal is given to the solenoids of the pilot valves S1 and S3 of the second cylinder for a predetermined time, and both cylinders P1 and P2 have returned to the return state. That is, the pilot valve S1
, The plunger in the pilot valve operates, the pilot valve switches from the right position to the left position, and the power source S
High-pressure gas from the manifold body 2A1, 2A2, through a common supply passage 2a 'through the manifold body 2A
A1 supply passage 2a1, supply passage 1 in the switching valve V1
Through a1, the piston in the switching valve is pressurized to set the switching valve from the right position to the left position. Then, the switching valve V
The high-pressure gas in the supply passage 1a1 in 1 passes through the switching valve at the left position, passes through the passages 1b1, 2b'1, reaches the cylinder P1, and moves the piston in the return direction. Further, the exhaust gas in the piston passes through the passages 2c'1, 1c
1 and reaches the switching valve V1, passes through the passages 1e1 and 2e1, and is radiated to the outside air by the muffler M through the common exhaust passage 2e 'penetrating through the manifold bodies 2A1 and 2A2. On the other hand, the energization of the pilot valve S1 is cut off after a predetermined time, and the pilot valve returns to the right position by a spring.
The gas pressurizing the piston in the switching valve passes through the exhaust passages 1f1 and 2f1 of the pilot valve, passes through the common exhaust passage 2d 'via the backflow prevention means X1 according to the present invention, reaches the muffler M, and diffuses to the outside air. Is done.

The pilot valve S3 operates similarly to the pilot valve S1, passes through the exhaust passages 1f2 and 2f2 of the corresponding pilot valve, passes through the common exhaust passage 2d 'through the backflow prevention means X3, and passes through the muffler M. And it is dissipated in the open air. Further, even in the manifold body 2A2 and the switching valve V2, the high-pressure gas passes through the passage corresponding to the switching valve V1 system and maintains the cylinder P2 in the return state.

In such an initial state, for example, when an electric signal is applied to the pilot valve S4 of the switching valve V2,
The pilot valve is switched to the right position, the pilot plunger blocks the pilot exhaust passage 1g2 and at the same time communicates with the pilot supply passage 1e2, and the high-pressure fluid passes through the switching valve V2.
To switch the valve from the left position to the right position. That is, the high-pressure fluid in the common supply passage 2a '
a2, 1a2 to the passage 1c2, and the cylinder P2
And the rod-side exhaust fluid flows from the rod-side passage 2b'2, passes through the passages 1b2, 1d2, passes through the common exhaust passage 2d ', and is discharged to the atmosphere through the muffler M. P2 is a going process. At this time, the pressure in the common exhaust passage 2d 'increases due to the exhaust fluid exhausted from the rod side chamber of the cylinder P2, and the pilot valve S
1, S2, S3 pilot exhaust passages 1f1, 1g1,
Attempts to flow into 1f2 are prevented by the backflow prevention means X1, X2, X3 based on the present invention, thereby preventing malfunction. That is, since the backflow prevention means X1 and X2 are provided according to the present invention, the pilot valve S of the switching valve V1 is provided.
Since both S1 and S2 communicate with the common exhaust passages 2d 'and 2e', even if the pressure difference between the pilot exhaust passage 1f1 and the pilot exhaust passage 1g1 occurs transiently, the piston of the switching valve V1 remains It does not move and change the switching position, thereby causing a malfunction.

The backflow preventing means X1, X thus formed
Since a 1 ', without thereby deliberately larger volume of the manifold body, thereby enabling effectively place the backflow prevention device. That is, compared to the joint surface between the switching valve and the manifold body, the number of holes such as the supply passage, the exhaust passage, the manifold body mounting screw holes, etc. is reduced on the joint surface between the manifold bodies, and the gap between the holes can be widened, Even with a miniaturized switching valve, a valve seat with good sealing properties can be provided, and the backflow prevention performance is stabilized. Further, in a tongue valve body plate packing backflow prevention means formed integrally, for example, even when the pilot exhaust passage as a double pilot valve as in the present embodiment there are two, one member the valve body is formed with, moreover, easily sandwiched between the manifold body can be accurately abut the valve seat, it can form a reliable backflow prevention means.

Although the embodiment in which the pilot exhaust passage is provided with the backflow prevention means has been described above, the backflow prevention means can be easily connected to the connecting portion of the manifold body or the manifold body in the passage in which the fluid always flows only in one direction. The same effect can be obtained because it can be provided at the connecting portion with the mounting base.

[0025]

As described above, according to the present invention, there is no restriction on the size of the fluid valve, and the transient influence of the operation of other connected fluid valve systems without increasing the volume of the manifold body. it can provide a manifold unit with an exclusion can, and reliable backflow prevention means. Further, it is possible to provide an effective and readily positionable manifold unit said backflow prevention means. The check valve seat may be provided between the manifold bodies.
Since there is no need to provide a special valve seat or the like on the fluid valve side , it is sufficient to mount a general fluid valve, and the versatility is excellent. In addition, use of articulated manifold valves
The number of manifolds can be freely changed according to the number of valve bodies to be used. And so on.

[0026]

[Brief description of the drawings]

[Figure 1] Der detailed view of the manifold main body according to the present invention
You.

FIG. 2 is an overall configuration diagram of the manifold valve according to the embodiment of the present invention .

FIG. 3 is a configuration diagram of a manifold unit according to the present invention.
is there.

FIG. 4 is a sectional view showing an internal configuration of the fluid valve according to the embodiment of the present invention .

FIG. 5 is a cross-sectional view illustrating an entire configuration of a backflow prevention unit according to another embodiment of the present invention.

FIG. 6 is a device circuit diagram showing the device configuration of the present invention and its operation.
It is.

[Explanation of symbols]

1 switching valve 2 manifold unit 2A manifold body 2C packing 2CF, 2Cg valve 2e ', 2d' common exhaust passage 2f, 2 g pilot exhaust passage 2F, 2G communication chamber 2F1,2G1 valve seat X1, X2, X3, X4 backflow prevention means

Claims (2)

(57) [Scope of request for utility model registration] 1. A manifold unit comprising a plurality of manifold bodies connected to each other in which pilot type fluid valves can be mounted, wherein a common exhaust passage communicating between adjacent manifold bodies and a joint surface between the manifold bodies are provided. A communication chamber, and the path communicating with the common exhaust passage via the communication chamber.
A pilot exhaust passage of an Ilot type fluid valve and the pilot exhaust passage from the common exhaust passage into the communication chamber;
A manifold unit provided with backflow prevention means for preventing backflow to the exhaust passage. 2. The method according to claim 1, wherein the backflow preventing means is provided in a manifold body .
A valve body formed in a packing interposed in the joint surface, and the pilot exhaust passage formed in a manifold body
2. The manifold unit according to claim 1, wherein the manifold unit is a combination with a valve seat formed in the opening of the manifold.