JPH043183Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a moving cylinder valve that opens and closes a valve seat by moving a cylinder.

[Prior Art] As shown in FIG. 4, a conventionally known pilot type three-port valve communicates a pressure fluid supply port P, an output port A, a discharge port R, and ports A and P and A and R. A pair of valve seats 1a, 1 in the passage
a valve body 2 having a shape of 1.b; a valve stem 4 connecting a pair of valve members 3a, 3b that open and close valve seats 1a, 1b;
A driving section consisting of a cylinder 5a and a piston 5b for driving the valve stem 4, and a valve stem 4 and a piston 5.
The cylinder 5a is provided with a connecting member 6 that integrally connects the cylinder 5a with the cylinder 5a, and the pilot fluid is supplied from the pilot port 7 to the cylinder 5a, and the ports A and P are communicated with each other.
When the pilot fluid is discharged, ports A and R are brought into communication with each other by the biasing force of the return spring 8, and port P is closed.

However, the above-mentioned known three-port valve has a problem in that the entire valve becomes large because the drive section is provided separately in the valve body 2.

[Problems to be Solved by the Invention] A problem to be solved by the present invention is to provide the driving portion of the valve member within the valve body to make the entire valve compact.

[Means for Solving the Problems] The present invention includes a valve body having a pressure fluid supply/discharge port, an output port, and a valve seat in a passage that communicates both ports, and a valve member that opens and closes the valve seat. In the valve consisting of a driving part, the valve body has a pair of main body members having the supply/discharge port, the valve seat, and a driving port in the center in the axial direction, and the output port, and the valve body has the pair of valve bodies. a cylindrical side wall member connected to the valve seats facing each other; The above problem is solved by providing a cylinder with a valve body and a passage opened in a pair of piston rods that communicates the driving port in the cylinder with the driving chamber partitioned by the piston. be.

[Function] A piston and a cylinder that drive the valve member are provided between a pair of main body members to effectively utilize the space inside the valve body, and a passage for supplying and discharging the driving fluid is provided in the piston rod to improve the driving fluid supply. Since there is no need to provide a separate drainage space in the valve body,
The entire valve can be made compact.

When the driving fluid is supplied from the driving port to one side of the driving chamber, the cylinder moves and the valve member opens one of the valve seats and closes the other, and the output port and one of the supply/discharge ports communicate, and the driving When the fluid is discharged, the cylinder moves in the opposite direction so that the valve member closes one of the valve seats and opens the other, so that the output port and the other of the supply/discharge ports communicate.

[Embodiment] Fig. 1 shows a first embodiment of the present invention, in which a valve main body 11 in this moving cylinder valve is composed of a pair of main body members 12a, 12b and a cylindrical side wall member 13 connecting them. has been done.

The main body members 12a, 12b have pressure fluid supply/discharge ports 15a, 15b that open in the radial direction, valve seats 16a, 16b that are opened concentrically with the axis, and communicate the ports 15a, 15b with the valve seats 16a, 16b. The side wall member 13 has a cylindrical shape, and the main body members 12a, 12 have driving ports 17a, 17b concentric with the valve seat and opening into the passage.
b is connected to valve seats 16a and 16b facing each other, and its outer periphery is relatively rotatable and hermetically sealed, and a radial output port A is provided at the center portion in the longitudinal direction. In addition, the drive port 17a,
The tips of the pair of piston rods 20a, 20b of the piston 19 are screwed into the opening on the passage side of the piston 17b, thereby integrally connecting the main body members 12a, 12b.

A cylinder 21 surrounding the piston 19 is installed in a space defined by the main body members 12a, 12b and the side wall member 13 at a distance from these inner walls, and a drive chamber inside the cylinder defined by the piston 19 is installed. 22a, 22b are piston rods 20
A pair of valves are connected to the drive ports 17a and 17b through axial passages 24a and 24b having a plurality of radial openings opened in the cylinders 21a and 20b. Members 25a, 25
b.

FIG. 1 shows a case where the port 15a is used as a pressure fluid supply port and the port 15b is used as a pressure fluid discharge port, and the drive port 17a is connected to the drive chamber 2.
The driving fluid supplied to the cylinder 2a causes the valve member 25a provided in the cylinder 21 to close the valve seat 16a, so that the output port A and the supply/discharge port 15b communicate with each other.

While discharging the driving fluid in the driving chamber 22a,
When the driving fluid is supplied to the driving chamber 22b, the cylinder 21 moves downward in the figure, and the supply/discharge port 15a and the output port A communicate with each other.

Therefore, by supplying and discharging the driving fluid to the drive ports 17a and 17b, the output port A can be switched to and communicated with the supply and discharge port 15a or 15b.

Note that the port 15b may be used as a pressure fluid supply port, and the port 15a may be used as a discharge port.

In the first embodiment, a pair of valve members 25a, 25
The cylinder 21 provided with b is connected to the pair of main body members 12
By installing it between a and 12b, the valve body 1
1, and drive chamber 22.
Passages 24a and 2 for supplying and discharging driving fluid to a and 22b
4b in the piston rods 20a and 20b, a space for driving the valve member is provided in the valve body 11.
Since there is no need to separately provide the valve, the entire valve can be made compact.

Further, the main body members 12a and 12b can be made of the same structure, and the piston 19 and the piston rods 20a and 20b can be made symmetrical both in the axial direction and in the direction perpendicular to this.
Since these processes are simple and there is no directionality, assembly is easy.

2 and 3 show a second embodiment of the present invention, the side wall member 30 of the second embodiment is provided with a plurality of output ports A, . One of the chambers of the cylinder 21 is made into a breathing chamber 31 in which a return spring 32 is contracted. However, similarly to the first embodiment, it may also be a driving chamber to which driving fluid is supplied and discharged.

Reference numerals 33, . . . in FIG. 3 indicate the main body members 12a, 1
This is the mounting hole provided in 2b.

In the second embodiment, the side wall members 30 can also be made symmetrical both vertically and horizontally in the drawings, so that machining and assembly are easier than in the first embodiment.

Although not shown, the main body member 12
Providing bearings at the fitting portions between a and 12b and the side wall member 30 can facilitate their relative rotation.

The other configurations and operations of the second embodiment are the same as those of the first embodiment except that the pressure fluid is output from a plurality of output ports A, . is omitted.

[Effects of the invention] The movable cylinder valve of the present invention has a cylinder equipped with a valve member that opens and closes the valve seat, which is installed between a pair of main body members to effectively utilize the space inside the valve main body, and Since there is no need to provide a passage for supplying and discharging the driving fluid to the piston rod and separately providing a space for supplying and discharging the driving fluid to the valve body, the entire valve can be made compact.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the first embodiment of the present invention, Fig. 2 is a longitudinal sectional front view of the second embodiment of the invention, Fig. 3 is a plan view of the same, and Fig. 4 is a known pilot type 3 port. FIG. 3 is a longitudinal sectional front view of the valve. 11... Valve body, 12a, 12b... Main body member, 13, 30... Side wall member, 15a, 15b...
...Supply/discharge port, 16a, 16b...Valve seat, 17
a, 17b...drive port, 19...piston, 20a, 20b...piston rod, 21...
...Cylinder, 22a, 22b...Drive chamber, 24
a, 24b...passage, 25a, 25b...valve member, A...output port.

Claims (1)

[Scope of Claim for Utility Model Registration] A valve consisting of a valve body having a pressure fluid supply/discharge port, an output port, and a valve seat in a passage that communicates both ports, and a driving part for a valve member that opens and closes the valve seat. , the valve body has a pair of main body members having the supply/discharge port, the valve seat, and a drive port in the center in the axial direction, and the output port, and the pair of valve bodies are arranged with their valve seats facing each other. and a cylindrical side wall member connected thereto, wherein the drive section includes a piston having a pair of piston rods connected to the drive port, and a cylinder surrounding the piston and having a valve member provided on a surface facing the valve seat. A moving cylinder valve, characterized in that it has a drive port opened in a pair of piston rods and a passage communicating a drive chamber in a cylinder partitioned by the pistons.