JP2002062938A - Fluid pressure regulating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid pressure regulating device capable of governing a high fluid pressure supplied from a fluid pressure supplying source and delivering it to a fluid pressure-operated equipment side. SOLUTION: This device comprises a supply valve element 34a for interrupting the communication of a feed port 24 to a pressure governing port 28 by being seated on a seat part 46 under the effect of a pilot pressure controlled by an air supplying solenoid valve 76 and/or an exhaust gas solenoid valve 82, and a pressure reducing mechanism 64 for reducing the pressure of the pressure fluid supplied from the feed port 24 to a prescribed pressure and delivering it to the air supply solenoid valve 76 and/or the exhaust gas solenoid valve 82 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid pressure regulating device capable of supplying a regulated predetermined fluid pressure to a fluid pressure device operated by fluid pressure.

[0002]

2. Description of the Related Art Conventionally, a work has been suctioned and conveyed using suction means such as a suction pad under the action of vacuum pressure. When supplying a vacuum pressure from a vacuum pump to the suction pad, between the vacuum pump and the suction pad, the vacuum pressure from the vacuum pump is adjusted to a predetermined value and supplied to the suction pad, For example, a vacuum pressure adjusting device such as a vacuum regulator is provided.

[0003]

In some cases, a high fluid pressure (positive pressure) is required depending on the use and type of the fluid pressure operating device, and a high fluid pressure supplied from a fluid pressure supply source is required. There is a demand for a fluid pressure adjusting device that reduces (positive pressure) to a predetermined fluid pressure and guides the fluid pressure to the fluid pressure operating device side.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned needs, and has a fluid pressure adjusting device capable of regulating a high fluid pressure supplied from a fluid pressure supply source and leading the fluid pressure to a fluid pressure operating device. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is a fluid pressure regulating apparatus for supplying a fluid pressure device operated by fluid pressure to a predetermined fluid pressure which is regulated under reduced pressure. A housing having a supply port connected to a fluid pressure supply source and a pressure regulating port connected to a fluid pressure operating device, and an axis line inside the housing under the action of a pilot pressure controlled by a control mechanism. A valve body that is provided so as to be displaceable along a direction and seats on a seating portion to cut off communication between the supply port and the pressure adjustment port; and a pressure of a pressure fluid supplied from the supply port by a predetermined amount. And a pressure reducing mechanism for reducing the pressure to a pressure and leading the pressure to a control mechanism.

In this case, as the pressure reducing mechanism, a spring member engaged inside the holding member and a displaceable valve rod engaged at the end of the spring member are provided, and the spring force and pressure of the spring member are provided. It is preferable that the communication path communicating with the supply port is closed by the valve stem by balancing the pressure of the fluid.

Further, it is preferable that a solenoid valve for air supply and a solenoid valve for exhaust are used as the control mechanism, and a pressure fluid reduced by a pressure reducing mechanism is supplied to the solenoid valve for air supply and the solenoid valve for exhaust.

According to the present invention, even when a high pressure fluid (positive pressure) is supplied to the supply port, the pressure of the pressure fluid is reduced to a predetermined pressure by the pressure reducing mechanism, so that the pilot pressure is controlled. The depressurized pressure fluid can be introduced to the control mechanism (the supply air valve and the discharge electromagnetic valve).

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a fluid pressure adjusting device according to the present invention will be described below in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a fluid pressure adjusting device according to an embodiment of the present invention.

The fluid pressure adjusting device 10 basically includes a substantially rectangular parallelepiped body portion 12 and a bonnet 14 integrally connected to an upper portion of the body portion 12. A connector 18 connected to, for example, a controller (not shown) via a lead wire 16 is provided above the hood 14. The body 12 and the hood 14 function as a housing.

The body part 12 is made of a metal material such as aluminum, for example, and has first to third block bodies 20a to 20c integrally laminated. On opposite side surfaces of the first block body 20a, a supply port 24 connected to a fluid pressure supply source 22 and a pressure regulating port 2 connected to a fluid pressure operating device 26 requiring high fluid pressure are provided.
8 are formed coaxially with a predetermined spacing therebetween. A communication path 30 is formed between the supply port 24 and the pressure adjustment port 28 to communicate the supply port 24 and the pressure adjustment port 28.

A closing member 32 for closing a hole formed in the bottom surface is screwed into the first block body 20a, and a supply valve 34a described later slides in the closing member 32. A projection 36 is formed. The protrusion 36
Is provided with a seal member 38 for keeping the sliding portion of the supply valve element 34a airtight.

A chamber 40 communicating with the atmosphere through a passage (not shown) is formed at a substantially central portion of the second block body 20b.
A piston 42 is slidably provided in the chamber 40. A piston rod 44 protruding downward is connected to the piston 42, and the piston rod 44
Is provided so as to contact the upper part of the supply valve element 34a. On the outer peripheral surface on the upper side of the supply valve body 34a, an elastic material such as rubber is used.
A seal member 48 that sits on and seals is mounted. An O-ring 50 is mounted on the outer peripheral surface of the piston 42 via an annular groove.

In this case, the supply valve body 34a is
Under the action of the spring force of the spring member 52, the valve is constantly urged so as to be seated on the seat portion 46 so that the communication between the supply port 24 and the pressure adjustment port 28 is shut off and the valve is closed. on the other hand,
The piston rod 44 resists the spring force of the first spring member 52.
Presses the supply valve body 34a downward, the seal member 48 is separated from the seat portion 46, and the valve is in an open state in which the supply port 24 and the pressure regulating port 28 communicate with each other through the communication passage 30. .

In the middle of the piston rod 44,
An exhaust valve body 34b is provided which is arranged symmetrically with the supply valve body 34a. The exhaust valve body 34b is
The supply valve element 34a is constituted by substantially the same components as those of the supply valve element 34a.

The exhaust valve body 34b is connected to the first spring member 5
As the piston rod 44 rises against the spring force of 2 and the ring 53 locked on the outer peripheral surface of the piston rod 44 rises integrally, the sealing member 48
6, the valve is opened. Therefore, the exhaust valve body 3
When the valve 4b is opened, the pressure fluid on the pressure adjustment port 28 side is exhausted to the outside via the passage 55.

The second block 20b and the third block 2
0c, a diaphragm 54 whose outer peripheral edge is sandwiched by the second block body 20b and the third block body 20c is interposed, and on the upper side of the diaphragm 54,
The diaphragm 54 and the concave portion 56 of the third block body 20c
Thus, a pilot chamber 58 is formed. The diaphragm 54 has a pair of disk members 60a, 60 that sandwich the diaphragm 54 between the upper surface and the lower surface.
The piston 42 is fixed to the lower surface of the lower disk member 60b.

Accordingly, the diaphragm 54, a pair of disk members 60a and 60b, and the piston 42 are provided so as to be integrally displaced along the vertical direction under the action of the pressure fluid supplied to the pilot chamber 58. I have.

The second block 20b has a supply port 2
A pressure reducing mechanism 64 is provided for reducing the pressure of the pressure fluid introduced via the first communication passage 62 communicating with the pressure control unit 4 to a predetermined pressure. As shown in FIG. 2, this pressure reducing mechanism 64
The second block body 20b is fitted in the screw hole,
First holding member 68 to which one end of spring member 66 is engaged
The other end of the second spring member 66 is engaged with the valve stem 70 which is constantly biased in a direction in which the first communication passage 62 is closed by the spring force of the second spring member 66. A second holding member 72 in which the valve stem 70 is displaceably fitted along a substantially horizontal direction.

A seal member 74 for closing the first communication passage 62 under the action of the spring force of the second spring member 66 is attached to one end of the valve stem 70.

Accordingly, when the fluid pressure of the pressure fluid introduced through the first communication passage 62 is balanced with the spring force of the second spring member 66, the seal member 74 of the valve rod 70 The pressure of the pressurized fluid flowing through the first communication passage 62 after being closed can be reduced to a predetermined fluid pressure.

The pressure reducing mechanism 64 is connected to a second communication passage 78 for supplying a pressure fluid depressurized to a predetermined fluid pressure to an air supply solenoid valve 76 described later.

Inside the bonnet 14, a supply air solenoid valve 76 and an exhaust air solenoid valve 82 are disposed at a predetermined distance from each other via a resin connection plate 80 connected to the third block body 20c. ing. The air supply solenoid valve 76 functions as an air supply valve for controlling the pilot pressure supplied to the pilot chamber 58, and the exhaust solenoid valve 82 controls the pressure fluid supplied to the air supply solenoid valve 76 to the outside. It functions as an exhaust valve for exhausting air. The air supply solenoid valve 76 and the exhaust solenoid valve 82 functioning as a control mechanism are turned on when a current signal is derived from a controller for an electromagnetic coil (not shown) to draw a valve body (not shown). Becomes

The air supply solenoid valve 76 and the exhaust solenoid valve 82
And a semiconductor pressure sensor 84 for detecting the pressure of the pressure fluid supplied to the fluid pressure operating device 26 via a feedback passage (not shown) communicating with the pressure adjustment port 28. The detection signal at 84 is led to a controller (not shown) via the electric circuit boards 86a and 86b and the connector 18. The controller compares a preset fluid pressure with a fluid pressure corresponding to the detection signal, and performs feedback control such that the deviation becomes zero. In addition, as the semiconductor pressure sensor 84, a high-pressure-compatible semiconductor pressure sensor may be used.

In this case, the third communication passage 88 is formed by energizing and deactivating the air supply solenoid valve 76 and the exhaust solenoid valve 82 by control signals output from a controller (not shown) via the connector 18. The pilot pressure supplied to the pilot chamber 58 via the controller is controlled.

The fluid pressure adjusting device 10 according to the embodiment of the present invention is basically configured as described above. Next, the operation and effect of the device will be described.

First, the supply port 24 is connected via a tube or the like.
The fluid pressure supply 22 is connected to the
Is connected to a hydraulic operating device 26 which requires a high fluid pressure. Further, as shown in FIG. 1, a state in which the supply valve body 34a is seated on the seat portion 46 and is in the valve closed state will be described as an initial position.

In this embodiment, an assist gas having a fluid pressure of, for example, 2.5 to 3.0 MPa is set to be supplied from the fluid pressure supply source 22 to the supply port 24. In addition, as the assist gas, for example, oxygen, nitrogen gas, air, or the like is used.

In the initial position as shown in FIG.
A high-pressure fluid is supplied to the supply port 24 under the action of the fluid pressure supply 22. The high-pressure fluid supplied to the supply port 24 is introduced into the pressure reducing mechanism 64 through the first communication passage 62, and is balanced with the spring force of the second spring member 66 so that the seal member 74 of the valve stem 70 is seated. Until you sit in the club
Decompression action is performed.

That is, the high-pressure fluid introduced through the first communication passage 62 is decompressed until it is balanced with the spring force of the second spring member 66, and the spring force and pressure of the second spring member 66 are further reduced. When the pressure of the fluid is balanced, the seal member 74 of the valve rod 70 is seated on the seat portion and the first communication passage 6
2 is closed.

The decompressed pressure fluid is introduced into the air supply solenoid valve 76 and the exhaust solenoid valve 82 through the second communication passage 78, and is controlled by a control signal (on / off signal) output from a controller (not shown). Supply air solenoid valve 76 and / or
Alternatively, the pilot pressure is controlled to a predetermined pressure by performing on / off control of the exhaust electromagnetic valve 82, respectively.

The pilot pressure controlled by the supply electromagnetic valve 76 and / or the exhaust electromagnetic valve 82 is equal to the third pressure.
The air is supplied to a pilot chamber 58 provided on the upper side of the diaphragm 54 through a communication passage 88. Under the action of the pilot pressure, the diaphragm 54, the set of disc members 6
0a, 60b, piston 42 and piston rod 44
Descends integrally. When the piston rod 44 descends, the supply valve body 34a is displaced downward against the spring force of the first spring member 52, and the sealing member 38
Is separated from the seat 46 to be in a valve-open state (see FIG. 3).

Accordingly, the pressurized fluid supplied to the supply port 24 is supplied to the sealing member 48 of the supply valve body 34a and the seat 4
After the pressure is reduced to a predetermined pressure fluid through the clearance with the pressure regulator 6, the pressure fluid is supplied from the pressure adjustment port 28 to the fluid pressure operating device 26 side.

The pressure of the pressure fluid supplied to the fluid pressure operating device 26 is introduced into the semiconductor pressure sensor 84 via a feedback path (not shown), and is fed back based on a detection signal output from the semiconductor pressure sensor 84. Control is exercised.

As described above, the piston 42 and the piston rod 44 are vertically displaced integrally with the diaphragm 54 by the pressure of the pressurized fluid supplied to the pilot chamber 58, thereby opening and closing the supply valve body 34a. The decompression effect is performed by this.

That is, under the action of the pilot pressure introduced into the pilot chamber 58, a force is applied to the diaphragm 54 and the pair of disk members 60a and 60b so as to be pressed downward integrally. When the force pressing the pair of disc members 60a and 60b downward and the spring force of the first spring member 52 are balanced, the supply valve body 34a is seated on the seat portion 46 to close the valve. Thus, a predetermined desired fluid pressure is supplied to the fluid pressure operating device 26 through the pressure adjusting port 28.

In this embodiment, even when a high pressure fluid (positive pressure) is supplied to the supply port 24, the pressure of the pressure fluid is reduced by the pressure reducing mechanism 64, so that the pilot pressure is controlled. A pressure fluid having a normal fluid pressure can be introduced into the pneumatic solenoid valve 76 and the exhaust solenoid valve 82. Therefore, it is not necessary to use specially-designed high-pressure solenoid valves as the air supply solenoid valve 76 and the exhaust solenoid valve 82, and it is possible to use ordinary solenoid valves, and to make major design changes. There is an advantage that the existing structure can be used as it is.

Further, since the pressure reducing mechanism 64 is integrally incorporated in the body portion 12, the whole apparatus does not become large and the installation space can be effectively used.

[0040]

According to the fluid pressure adjusting device of the present invention, the following effects can be obtained.

That is, even when a high pressure fluid (positive pressure) is supplied to the supply port, the pressure of the pressure fluid is reduced to a predetermined pressure by the pressure reducing mechanism. The decompressed pressure fluid can be introduced into the air supply solenoid valve and the exhaust solenoid valve).

Therefore, it is not necessary to use specially-designed high-pressure solenoid valves as the supply and exhaust solenoid valves, and it is possible to use ordinary solenoid valves, and to make major design changes. An effect is obtained that the existing structure can be used as it is without any change.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view along an axial direction of a fluid pressure adjusting device according to an embodiment of the present invention.

FIG. 2 is an enlarged longitudinal sectional view of a pressure reducing mechanism constituting the fluid pressure adjusting device of FIG.

FIG. 3 is an operation explanatory diagram in which a supply valve element changes from a valve closed state to a valve open state shown in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Fluid pressure adjusting device 12 ... Body part 14 ... Bonnet 20a-20c ... Block body 22 ... Fluid pressure supply source 24 ... Supply port 26 ... Fluid pressure operating device 28 ... Pressure regulating port 30, 62, 78, 88 ... Communication path 34a ... supply valve element 34b ... exhaust valve element 42 ... piston 44 ... piston rod 46 ... seating part 52, 66 ... spring member 54 ... diaphragm 58 ... pilot chamber 60a, 60b ... disk member 64 ... pressure reducing mechanism 68, 72 ... Holding member 70: Valve stem 76: Solenoid valve for air supply 82: Solenoid valve for exhaust 84: Semiconductor pressure sensor

Claims (3)

[Claims] 1. A fluid pressure regulating device for supplying a fluid pressure device operated by fluid pressure to a predetermined fluid pressure reduced and regulated, comprising: a supply port connected to a fluid pressure supply source; A housing having a pressure regulating port connected to the equipment, and under the action of a pilot pressure controlled by a control mechanism,
A valve body is provided inside the housing so as to be displaceable in the axial direction, and is seated on a seating portion to cut off communication between the supply port and the pressure regulating port. A pressure reducing mechanism that reduces the pressure of the pressure fluid to a predetermined pressure and guides the pressure to a control mechanism side. 2. The device according to claim 1, wherein the pressure reducing mechanism includes a spring member fixed inside the holding member, and a valve rod fixed to an end of the spring member and provided to be displaceable. And a communication passage communicating with the supply port by the valve rod is closed by balancing the spring force of the spring member and the pressure of the pressure fluid. 3. The apparatus according to claim 1, wherein the control mechanism includes an air supply solenoid valve and an exhaust solenoid valve, and the air supply solenoid valve and the exhaust solenoid valve include a pressure reducing mechanism. A fluid pressure adjusting device, wherein a pressure fluid reduced in pressure is supplied.