JPH05203072A - Rotary valve - Google Patents

Abstract

PURPOSE:To improve waterproof and explosionproof by decreasing a number of rows of pilot valves, contriving cost reduction and miniaturization, reducing a number of wires, and eliminating miswiring, in a rotory valve. CONSTITUTION:In a rotary valve, a structure is provided such that a pulse motor 1, rotor part 2 and a connecting part 3 are provided to rotate a pilot output port Pi of a pilot valve 14a by the pulse motor 1, stopped and connected in one end of a connecting port Al corresponding to an opening/closing actuated manifold type pneumatic operating valve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique effectively applied to a rotary valve for controlling a manifold type pneumatically operated valve, for example.

[0002]

2. Description of the Related Art As a technique for controlling a manifold type pneumatically operated valve, a pilot valve is provided for each manifold type pneumatically operated valve, and a pilot valve corresponding to the manifold type pneumatically operated valve to be opened / closed is used as a sequence control signal from a sequencer. There is a structure that opens and closes based on this.

[0003]

However, in the structure of the prior art described above, since the pilot valve is arranged for each manifold type pneumatically operated valve, the number of stations of the pilot valve increases. was there.

Therefore, there are problems that the cost is high, the size is increased, the number of wirings is increased, and erroneous wirings are caused.

Further, since the conventional manifold type solenoid valve has a structure in which the manifold type pneumatically operated valve is integrally formed with the pilot valve, there is a problem that it is not waterproof and explosion proof.

An object of the present invention is to provide a rotary valve capable of reducing the number of pilot valve stations.

Another object of the present invention is to provide a rotary valve which can reduce the cost and size, reduce the number of wirings, and prevent erroneous wirings.

Another object of the present invention is to provide a rotary valve which can improve waterproofness and explosion proofness.

[0009]

Among the inventions disclosed in the present application, a brief description will be given to the outline of typical ones.
It is as follows.

That is, the rotary valve of the present invention includes a rotary drive unit and at least one rotary drive unit connected to the rotary drive unit.
It has a number of pilot valves, and has a rotor part in which the pilot output port of this pilot valve is opened on the sliding surface and a sliding surface for the sliding surface, and one end is opened on this sliding surface. And a connecting portion having a plurality of connection ports on the other end for connecting the manifold type fluid pressure operated valve on a circumference centered on the rotation center of the rotor portion, and the pilot output port by the rotation drive portion. Is a structure in which one end of the connection port corresponding to the manifold type fluid pressure operated valve for rotating and opening / closing is stopped and communicated.

Further, in this case, the rotation drive unit may be constructed by a pulse motor.

Further, in this case, an elastic body seal is provided around the opening of the pilot output port formed on the sliding surface of the rotor portion, and the elastic body seal is expanded by pilot air when the pilot valve is opened. Thus, a sealed passage is formed between the connection port of the connecting portion and the pilot output port.

[0013]

According to the rotary valve described above, a rotor having a rotary drive unit and at least one pilot valve connected to the rotary drive unit and having a pilot output port of the pilot valve opened on a sliding surface. And a sliding surface for the sliding surface, one end of which is opened at the sliding surface, and the other end of which is connected to the manifold-type fluid pressure actuating valve as a connection port which is the center of rotation of the rotor section. And a plurality of connecting portions on the circumference around the center, and the pilot output port is rotated by the rotation driving portion to stop at one end of the connecting port corresponding to the manifold type fluid pressure operated valve to be opened / closed. Since the structure is made to communicate, the number of stations of the pilot valve can be reduced.

As a result, the cost can be reduced and the size can be reduced, the number of wirings can be reduced, and erroneous wirings can be eliminated.

Further, since the rotary valve is provided separately from the manifold type fluid pressure operated valve, the waterproof property and the explosion proof property can be improved.

Further, in this case, since the rotary drive unit is constituted by the pulse motor, the manifold type fluid pressure actuated valve to be opened / closed can be controlled by the number of pulses to improve the controllability.

Further, in this case, an elastic body seal is provided around the opening of the pilot output port formed on the sliding surface of the rotor portion, and the elastic body seal is expanded by pilot air when the pilot valve is opened. Since the sealed passage is formed between the connection port of the connecting portion and the pilot output port, the sealing performance of the passage can be improved and the rotor portion can be smoothly rotated.

[0018]

Embodiment 1 FIG. 1 is a front view showing a rotary valve which is Embodiment 1 of the present invention, FIG. 2 is a right side view showing the rotary valve of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, FIG. 5 is a plan view showing a manifold type pneumatically actuated valve used in the rotary valve shown in FIG. 1, and FIG. 6 is a sectional view taken along line VI-VI in FIG.

The rotary valve in the first embodiment has a pulse motor 1, a rotor portion 2 and a connecting portion 3 which are coaxially connected.

The pulse motor 1 controls the rotation angle according to the number of pulses, and the rotor 2a of the rotor section 2 is directly connected to the motor shaft of the pulse motor 1 via the rotation shaft 13, and the housing 2
It has a structure that can rotate in b.

First and second pilot valves 4a and 4b are provided on both sides of the outer peripheral surface of the rotary shaft 13 and face each other. Each of these pilot valves 4a and 4b is a 3-port valve and has a pilot valve body 5.

A solenoid portion 6 is provided in the pilot valve main body 5, a fixed column 8 is provided in a shaft hole 7 of the solenoid portion 6, and a plunger 9 is slidably provided on the fixed column 8 so as to face the fixed column 8. , Projects into the communication chamber 10.

A poppet 11 is formed at the end of the plunger 9 and is pressed against the valve seat 14a on the pilot input port PP side by the urging force of the plunger spring 12, and the flapper 15 is held between the plunger pin 16 and the flapper spring 17. , Is pressed against the valve seat 14b of the pilot exhaust port PR.

The pilot air from the pilot exhaust port PR is exhausted to the outside through the gap between the housing 2b and the pilot valve body 5. The communication chamber 10 has first and second pilot output ports P1, P.
2 connected to these pilot output ports P1, P2
Is opened in the sliding surface 19 of the pilot valve body 5, and an O-ring 21 is fitted around the opening.

A connecting portion 3 is connected to the open end of the housing 2b, and the connecting portion 3 has a sliding surface 23 for the sliding surface 19 of the pilot valve body 5. A connection port A1 having one end opened to the sliding surface 23 and the other end connected to the manifold type pneumatically actuated valves A to H through piping.
.About.H1 and A2 to H2 are formed at equal pitches on the circumference centered on the center of rotation of the rotor 2a and have a structure in which they face each other, and the rotor 2a is rotated by the pulse motor 1 and its pilot output port Rotate P1 and P2,
The structure is such that the connection ports A1 to H1 and A2 to H2 corresponding to the manifold type pneumatically operated valves A to H to be opened and closed are stopped and communicated.

The manifold type pneumatic actuating valves A to H are composed of 8 stations, mounted on a manifold block, and the pilot air is supplied to and discharged from the pilot ports a1 to h1 and a2 to h2. 20
It has a function of reciprocating the main shaft 18 between two positions via b to switch the connection between the input port P, the output ports a and b, and the exhaust port R.

A pilot input port PP is formed in the center of the rotary shaft 13 of the rotor 2a, and a first positive ring terminal 22a, a negative ring terminal 22b and a second positive ring terminal 22c are formed around the rotary shaft 13. The solenoid portions 6 of the first and second pilot valves 4a and 4b are electrically connected to the terminals 22a, 22b, and 22c, which are concentrically formed. The terminals 22a, 22b, 22c are electrically connected to the outside via an annular conductive sliding surface (not shown) and a conductive brush.

Next, the operation of the first embodiment will be described.

When operating the rotary valve having the above construction, first, as shown in FIG. 4, the rotor 2a is rotated by the pulse motor 1, and the first and second pilot valves 4 are
When a and 4b are stopped while extending in the vertical direction, the first
The pilot output ports P1 and P2 of the second pilot valves 4a and 4b are connected to the first and second pilot ports a1 and a2 of the manifold type pneumatically actuated valve A through the connection ports A1 and A2.

Next, when the first pilot valve 4a is turned on and the second pilot valve 4b is turned off, in the first pilot valve 4a, the plunger 9 moves to the fixed column 8 side and the poppet 11 moves to the first column. Away from the valve seat 14a of
The flapper 15 is pressed against the second valve seat 14b,
Valve seat 14a is opened and the second valve seat 14b is closed. As a result, pilot air from the pilot input port PP is supplied into the first piston chamber 20A from the pilot port a1 of the manifold type pneumatically operated valve A via the communication chamber 10, the pilot output port P1, and the connection port A1.

Further, in the second pilot valve 4b, the second piston chamber 20B of the manifold type pneumatically operated valve A is processed through a process reverse to that of the first pilot valve 4a.
The pilot air therein is exhausted from the pilot exhaust port PR of the second pilot valve 4b via the connection port A2 and the second pilot output port P2.

As a result, the manifold type pneumatically operated valve A
Then, the first piston 20a and the main shaft 18 move to the second piston 20b side, so that the air from the input port P is supplied to the output port a and the air from the output port b passes through the exhaust port R to the outside. Exhausted to.

As described above, the manifold type pneumatically operated valve A is formed by the pulse motor 1 and the two pilot valves 4a and 4b.
By controlling ~ H, the number of pilot valve stations can be reduced.

Therefore, the cost can be reduced and the size can be reduced, the number of wirings can be reduced, and erroneous wirings can be eliminated.

Further, since the rotary valve is provided separately from the manifold type pneumatically operated valves A to H, the waterproof property and the explosion proof property can be improved.

Further, the manifold type fluid pressure operated valve to be opened and closed can be controlled by the pulse motor 1 to improve the controllability.

[0037]

Embodiment 2 FIG. 7 is a sectional view showing a rotary valve which is Embodiment 2 of the present invention, FIG. 8 is a sectional view taken along line VIII-VIII of FIG.
FIG. 9 is a sectional view showing a main part of the rotary valve of FIG.

The rotary valve of the second embodiment is characterized in that the sealing property of the passage 26 formed between the sliding surface 19 of the rotor portion 2 and the sliding surface 23 of the connecting portion 3 is improved. Have.

That is, the first pilot output ports P1a and P1b are connected in series to the communication chamber 10 in the rotor portion 2, and the pilot output port P1b is opened in the sliding surface 19 of the rotor portion 2 for connection. It faces the connection port A1 of the section 3. On the sliding surface 19 of the rotor portion 2, an elastic body seal 24 is fitted on the circumference around the pilot output port P1b. The elastic body seal 24 has an annular shape and has a seal portion 24a for sealing the sliding surface 23 of the connection portion 3 and a bellows-shaped inner peripheral portion 24b and outer peripheral portion 24c.
And an annular hollow portion 25 is formed inside.

The open end of the hollow portion 25 has a ring shape and is fitted in a sliding state on the sliding surface 19 of the connecting portion 3, one end of which is opened and the other end of which is a pilot output. Plural L-shaped supply ports X communicating with the port P1a are formed at an equal pitch in the circumferential direction, and pilot air from the pilot output port P1a is supplied to the hollow portion 25 of the elastic seal 24 to extend the elastic seal 24. And press it against the sliding surface 23 of the connecting portion 3 to pilot output port P1.
The structure is such that a sealed passage 26 is formed between b and the connection port A1.

Regarding the operation of the second embodiment, when the pilot valve 4a is opened, pilot air is supplied to the hollow portion 25 of the elastic body seal 24 through the supply port X when passing through the pilot output ports P1a and P1b. Therefore, the elastic body seal 24 expands, and the passage 26 in the sealed state is provided between the pilot output port P1b and the connection port A1.
Is formed.

When the pilot valve 4a is closed, the air in the hollow portion 25 is exhausted together with the exhaust of the pilot air, so that the elastic seal 24 contracts and the space between the sliding surface 23 of the connecting portion 3 and the elastic member seal 24 contracts. A gap is created in the elastic member seal 24, so that the elastic body seal 24 is not worn by the rotation of the rotor portion 2.

Therefore, the sealing property of the passage 26 can be improved and the rotor portion 2 can be smoothly rotated.

The invention made by the present inventor has been specifically described above based on the embodiments, but the present invention is not limited to the embodiments and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, in the above embodiment, the case of the rotor provided with two pilot valves corresponding to the double pilot manifold type pneumatically operated valve has been described.
The invention is not limited to this, and can be applied to the case of a rotor equipped with one pilot valve corresponding to a single pilot manifold type pneumatically operated valve.

Further, in the above-mentioned embodiment, the case where the pulse motor is used as the rotary drive unit has been described, but the present invention is not limited to this, and a servo motor is provided instead of the pulse motor.
The rotation angle of the rotor can be controlled based on the feedback signal from the rotation angle sensor.

Further, in the above embodiment, the case where the number of stations of the manifold type pneumatically operated valve is 8 has been described, but the number of stations of the manifold type pneumatically operated valve is not limited to this and is 16 stations.
It can be a multiple number such as a series.

In the above description, the invention made by the present inventor was mainly applied to a rotary valve which uses air pressure as fluid pressure, which is the field of application thereof, but the invention is not limited to this and hydraulic pressure is used as fluid pressure. It can be applied to the used rotary valve.

[0049]

The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows.
It is as follows.

(1). A rotary drive unit, a rotor unit connected to the rotary drive unit, having at least one pilot valve, and having a pilot output port of the pilot valve opened on a sliding surface; A connection port having a sliding surface for the sliding surface, one end of which is opened at the sliding surface, and the other end of which is connected to the manifold fluid pressure actuated valve is centered on the center of rotation of the rotor section. With a connecting portion having a plurality on the circumference,
Since the pilot output port is rotated by the rotary drive unit and is connected to one end of the connection port corresponding to the manifold type fluid pressure operated valve to be opened / closed so as to communicate, the number of pilot valves can be reduced. it can.

(2) Due to the effect of (1), the cost can be reduced and the size can be reduced, the number of wirings can be reduced, and erroneous wirings can be eliminated.

(3) Since the rotary valve is provided separately from the manifold type fluid pressure operated valve, the waterproof property and the explosion proof property can be improved.

(4) In the case of the above (1), since the rotary drive unit is composed of the pulse motor, the manifold type fluid pressure operated valve to be opened / closed is controlled by the number of pulses to improve the controllability. be able to.

(5) In the case of the above (1), an elastic seal is provided around the opening of the pilot output port formed on the sliding surface of the rotor, and pilot air is used when the pilot valve is opened. Since the elastic body seal is extended to form a sealed passage between the connection port of the connecting portion and the pilot output port, the sealing performance of the passage is improved,
The rotor part can be rotated smoothly.

[Brief description of drawings]

FIG. 1 is a front view showing a rotary valve according to an embodiment of the present invention.

FIG. 2 is a right side view showing the rotary valve of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

5 is a plan view showing a manifold type pneumatically actuated valve used in the rotary valve of FIG. 1. FIG.

6 is a cross-sectional view taken along the line VI-VI of FIG.

FIG. 7 is a cross-sectional view showing a rotary valve that is Embodiment 2 of the present invention.

8 is a sectional view taken along line VIII-VIII of FIG.

9 is a cross-sectional view showing the main parts of the rotary valve of FIG.

[Explanation of symbols]

 1 pulse motor 2 rotor part 2a rotor 2b housing 3 connection part 4a first pilot valve 4b second pilot valve 5 pilot valve body 6 solenoid part 7 shaft hole 8 fixed column 9 plunger 10 communicating chamber 11 poppet 12 plunger spring 13 rotary shaft 14a valve seat 14b valve seat 15 flapper 16 plunger pin 17 flapper spring 18 main shaft 19 sliding surface 20a first piston 20b second piston 20A first piston chamber 20B second piston chamber 21 O-ring 22a second 1 positive ring terminal 22b negative ring terminal 22c second positive ring terminal 23 sliding surface 24 elastic body seal 24a seal portion 24b inner peripheral portion 24c outer peripheral portion 25 hollow portion 26 passage P1 first pilot output port P2 second Pilot output port P1a No. 1 Pilot output port P1b 1st pilot output port PP pilot input port PR pilot exhaust port P input port a output port b output port R exhaust port X supply port A1 to H1 connection port A2 to H2 connection port A to H manifold type pneumatic operation Valve a1 to h1 Pilot port a2 to h2 Pilot port

Claims (3)

[Claims] 1. A rotary drive unit, a rotor unit connected to the rotary drive unit, having at least one pilot valve, the pilot output port of the pilot valve being opened in a sliding surface, and the sliding unit. A connection port having a sliding surface for the surface, one end of which is opened at the sliding surface, and the other end of which is connected to the manifold type fluid pressure actuated valve has a circumference around the rotation center of the rotor section. A plurality of connecting portions on the upper side, wherein the pilot output port is rotated by the rotation driving portion to stop and communicate with one end of the connecting port corresponding to the manifold type fluid pressure operated valve to be opened / closed. Rotary valve to be used. 2. The rotary valve according to claim 1, wherein the rotary drive unit is a pulse motor. 3. An elastic body seal is provided around an opening of a pilot output port formed on the sliding surface of the rotor portion, and the elastic body seal is extended by pilot air when the pilot valve is opened to connect. The rotary valve according to claim 1, wherein a passage in a sealed state is formed between the connection port of the section and the pilot output port.