JP2004206427A - Pressure reducing mechanism and fluid pressure adjusting device having the same - Google Patents

Abstract

An object of the present invention is to provide a pressure reducing mechanism which can stably perform a pressure adjusting operation of a pressure fluid, has high durability, and is excellent in versatility, and a fluid pressure adjusting device having the pressure reducing mechanism. I do.
A pressure reducing mechanism is housed in a second body portion and has one end engaged with a spring member, and an exhaust valve engaged with the other end of the spring member and a diaphragm. And a chamber 130 formed by the first body part 120 and the diaphragm 150 and into which a pressure fluid is introduced, and an exhaust passage 138 formed in the first body part 120 and communicating the chamber 130 with the outside. The pressure reducing mechanism 106 has a screw hole 160 formed in a predetermined portion of the first body portion 120 and the second body portion 122, and is detachably attached to a side portion of the second block body 20b through the screw hole 160 with a bolt or the like. It is attached.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a decompression mechanism for decompressing a pressure fluid and a fluid pressure adjusting device having the decompression mechanism.
[0002]
[Prior art]
Conventionally, a high fluid pressure (positive pressure) may be required depending on the use and type of a fluid pressure operated device, and a high fluid pressure (positive pressure) supplied from a fluid pressure supply source is applied to a predetermined fluid. There has been proposed a fluid pressure adjusting device that reduces the pressure to a pressure and leads the fluid pressure working device side.
[0003]
The present applicant has already proposed a fluid pressure adjusting device as disclosed in Patent Document 1. The fluid pressure adjusting device according to the proposal of the present applicant incorporates a pressure reducing mechanism for reducing the pressure of the pressure fluid supplied from the supply port to a predetermined pressure inside the main body. That is, according to this fluid pressure adjusting device, even when a high pressure fluid (positive pressure) is supplied to the supply port, the pressure of the pressure fluid is reduced by the pressure reducing mechanism, so that the pilot pressure is controlled. A pressurized fluid having a normal pressure can be introduced into the air supply solenoid valve and the exhaust solenoid valve. Therefore, there is an advantage that it is not necessary to use specially-designed high-pressure solenoid valves as the supply and exhaust solenoid valves, and normal solenoid valves can be used.
[0004]
[Patent Document 1]
JP-A-2002-062938 ([Claims], [FIG. 1])
[0005]
[Problems to be solved by the invention]
The present invention has been made in connection with Patent Literature 1, and has a pressure reducing mechanism that can stably perform a pressure regulating operation of a pressure fluid, has high durability, and is excellent in versatility. An object of the present invention is to provide a fluid pressure adjusting device having a mechanism.
[0006]
[Means for Solving the Problems]
To achieve the above object, the present invention provides a body,
A diaphragm mounted inside a chamber formed in the body,
A spring member for pressing one surface side of the diaphragm,
A pressure adjusting member for adjusting the pressing force of the spring member;
A valve body provided on the other surface side of the diaphragm to open and close an exhaust passage under a displacement action of the diaphragm;
An input passage and an output passage are formed in communication with the chamber on the other surface side of the diaphragm, and when the fluid pressure to the input passage is larger than the set pressing force of the spring member, the diaphragm The exhaust passage is opened by displacing the valve element (the invention according to claim 1).
[0007]
According to the present invention, for example, since a sliding component such as a piston is not required, the operation of the pressure reducing mechanism can be stabilized and the durability thereof can be improved.
[0008]
The present invention also provides a housing having a supply port connected to a fluid pressure supply source, a pressure regulating port connected to a fluid pressure operating device, and 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 inside and seats on a seating portion to cut off the communication between the supply port and the pressure regulating port, and receives the pressure fluid supplied from the fluid pressure supply source. In a fluid pressure adjusting device for adjusting the pressure to be supplied to the fluid pressure operating device,
A decompression mechanism is detachably mounted on the housing, and the housing has an input passage for introducing a pressure fluid to the decompression mechanism, and an output passage for leading the pressure fluid decompressed by the decompression mechanism to the control mechanism. ,
The pressure reducing mechanism includes a body,
A diaphragm mounted inside a chamber formed in the body,
A spring member for pressing one surface side of the diaphragm,
A pressure adjusting member for adjusting the pressing force of the spring member;
A valve body provided on the other surface side of the diaphragm to open and close an exhaust passage under a displacement action of the diaphragm;
An input passage and an output passage are formed in communication with the chamber on the other surface side of the diaphragm, and when the fluid pressure to the input passage is larger than the set pressing force of the spring member, the diaphragm The exhaust passage is opened by displacing the valve element (the invention according to claim 2).
[0009]
According to the present invention, since the pressure reducing mechanism is formed separately from the housing, the pressure reducing mechanism can be set to an arbitrary size without being affected by the size of the housing. For example, when the area of the diaphragm constituting the pressure reducing mechanism is increased, it is possible to derive a stable pressure that is hardly affected by the fluctuation of the supply pressure to the control mechanism. As a result, the supplied high fluid pressure can be stably reduced to a predetermined fluid pressure.
[0010]
Further, in the present invention, since the pressure reducing mechanism is configured to be detachable from the housing, for example, instead of the pressure reducing mechanism, a fluid pressure supply source for leading out a pressure fluid corresponding to the pressure of the control mechanism is provided. It is also possible to connect directly to the control mechanism. That is, the configuration of the fluid pressure adjusting device can be constructed in various forms, and therefore, the versatility of the fluid pressure adjusting device can be improved.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the pressure reducing mechanism according to the present invention in relation to a fluid pressure adjusting device incorporating the same will be described in detail with reference to the accompanying drawings.
[0012]
In FIG. 1, reference numeral 10 indicates a fluid pressure adjusting device according to an embodiment of the present invention.
[0013]
The fluid pressure adjusting device 10 basically includes a body portion 12 having a substantially rectangular parallelepiped shape, and a bonnet 14 integrally connected to an upper portion of the body portion 12. A connector 18 connected to a control device such as a higher-level sequencer (not shown) via a lead wire 16 is provided above the hood 14. The upper sequencer supplies operation power to the fluid pressure adjusting device 10 and transmits control signals such as a start signal and a set pressure. The body 12 and the hood 14 function as a housing.
[0014]
The body portion 12 is made of a metal material such as aluminum, for example, and has a first block body 20a and a second block body 20b that are integrally laminated.
[0015]
At both ends of the center of the first block body 20a, a supply port 24 connected to a fluid pressure supply source 22 for introducing a primary pressure and a fluid pressure operating device 26 requiring high fluid pressure are connected to the fluid A pressure adjusting port 28 from which a secondary pressure is led out to the pressure operating device 26 is formed coaxially with a predetermined distance therebetween. A communication path 30 is formed between the supply port 24 and the pressure adjustment port 28 to allow the supply port 24 and the pressure adjustment port 28 to communicate with each other.
[0016]
A hole 40 is formed in the bottom surface of the first block body 20a, and a closing member 42 for closing the hole 40 is screwed into the hole 40. A concave portion 46 for accommodating a supply valve element 44 (valve element) is formed at the upper center of the closing member 42. An O-ring 47 for keeping the sliding portion of the supply valve body 44 airtight is attached to a substantially central portion of the inner peripheral surface of the recess 46, and a compression coil spring is provided at the bottom of the recess 46. One end of the spring member 48 is seated.
[0017]
The supply valve body 44 is formed with a sliding portion 50 that slides with an inner peripheral surface forming the concave portion 46. A holding groove 52 for holding the upper end of the spring member 48 is formed inside the sliding portion 50. In addition, a stem 56 projecting upward in FIG. 1 is provided at a central portion of the supply valve body 44, and the stem 56 has a fine hole 54 formed therein.
[0018]
A seal member 60 made of an elastic material such as rubber and seated on a seat portion 58 formed on the first block body 20a is mounted on the upper surface side of the supply valve body 44.
[0019]
A piston 72 is slidably housed in a chamber 70 formed in the upper part of the first block body 20a. The piston 72 includes an upper side 72a and a lower side 72b having a smaller diameter than the upper side 72a, as can be understood from FIG. That is, the area of the piston 72 that receives pressure (pressure receiving area) is different between the upper side 72a and the lower side 72b. An opening 74 is formed in the lower central portion of the piston 72 so as to be directed in the axial direction. The diameter of the opening 74 is set to be smaller than the diameter of the stem 56, and the lower end is slightly enlarged to face the tip of the stem 56. Therefore, when the stem 56 enters the opening 74, the opening 74 is closed by the spherical tip of the stem 56.
[0020]
The far end of the opening 74 communicates with a plurality of communication passages 76 arranged at substantially equal intervals, and the communication passage 76 communicates with a chamber 78 provided above the chamber 70 in the figure. Further, the chamber 78 communicates with an exhaust port (not shown) and is open to the atmosphere.
[0021]
On the other hand, the lower part of the chamber 70 divided by the piston 72 communicates with the pressure adjustment port 28. In FIG. 1, reference numeral 80 denotes an O-ring that presses against and seals the side peripheral surface of the piston 72.
[0022]
With the above-described configuration, the supply valve body 44 is seated on the seat portion 58 under the action of the spring force of the spring member 48 so as to be in a valve closed state in which communication between the supply port 24 and the pressure adjustment port 28 is interrupted. It will be readily appreciated that the power is always on. On the other hand, when the piston 72 presses the supply valve body 44 downward in the drawing against the pressing force of the spring force of the spring member 48 and the secondary pressure acting on the lower surface of the piston 72, the seal member 60 The valve is separated from the seating portion 58 and is in an open state in which the supply port 24 and the pressure adjustment port 28 communicate with each other through the communication passage 30.
[0023]
Between the first block body 20a and the second block body 20b, a diaphragm 82 having an outer peripheral portion sandwiched therebetween is interposed. Above the diaphragm 82, a pilot chamber 86 is formed by the diaphragm 82 and a recess formed below the second block body 20b. The center of the diaphragm 82 is held between the disk member 88 and the upper surface of the piston 72.
[0024]
Therefore, the diaphragm 82, the disk member 88, and the piston 72 are integrally displaced in the vertical direction under the action of the pressure fluid supplied to the pilot chamber 86.
[0025]
A chamber 84 is formed on the opposite side of the pilot chamber 86 of the second block body 20b, and a pressure sensor 94 is provided on a fixed plate 90 provided in the chamber 84. The input side of the pressure sensor 94 communicates with the pressure adjustment port 28 via a feedback passage 92 formed in the first block body 20a and the second block body 20b. The pressure sensor 94 detects a pressure signal of a pressure fluid supplied to the fluid pressure operating device 26 side, and the pressure signal is led out to a control unit 96 disposed inside the bonnet 14. The control unit 96 compares the set pressure received from the upper sequencer with the fluid pressure detected by the pressure sensor 94, and performs feedback control so that the deviation becomes zero. It is preferable that a high-pressure-compatible semiconductor pressure sensor or the like be used as the pressure sensor 94.
[0026]
Therefore, the second block body 20b is provided with a first communication path 100 communicating with the supply port 24 via the first block body 20a, and a second communication path 104 communicating with an air supply solenoid valve 102 described later. In addition, a pressure reducing mechanism 106 to be described later is externally attached to the second block body 20b. The first communication passage 100 and the second communication passage 104 are connected to an inlet side and an outlet side of the pressure reducing mechanism 106, which will be described later.
[0027]
Inside the bonnet 14, the air supply solenoid valve 102 and the exhaust solenoid valve 112 are disposed at a predetermined interval via a resin connection plate 110 connected to the second block body 20 b. I have. The air supply solenoid valve 102 functions as an air supply valve that controls the pilot pressure supplied to the pilot chamber 86, while the exhaust solenoid valve 112 controls the pressure fluid supplied to the air supply solenoid valve 102. Functions as an exhaust valve that exhausts to the outside. The air supply solenoid valve 102 and the exhaust solenoid valve 112 functioning as control mechanisms supply and cut off current to an electromagnetic coil (not shown) to perform on / off control.
[0028]
In other words, the air supply solenoid valve 102 and the exhaust solenoid valve 112 are energized and deenergized by the control signal output from the control unit 96, and are supplied to the pilot chamber 86 via the third communication passage 114. The pilot pressure is controlled.
[0029]
Here, the configuration of the pressure reducing mechanism 106 will be described. As shown in FIG. 2, the decompression mechanism 106 has a first body part 120 and a second body part 122 that are integrally connected. As shown in FIG. 3, an input port 124 connected to the first communication path 100 is formed in the first body 120. An O-ring 125 is mounted on the inner peripheral portion of the input port 124 to hermetically hold a mounting portion between the second block body 20b and the first body portion 120. On the downstream side of the input port 124, a fixed throttle portion 126 and an input passage 128 are sequentially formed, and the input passage 128 communicates with a chamber 130 formed in the first body portion 120.
[0030]
Further, an output port 134 connected to the second communication path 104 is formed in the first body part 120, as shown in FIG. An O-ring 135 is attached to the inner peripheral portion of the output port 134 to keep the attachment portion between the second block body 20b and the first body portion 120 airtight. The output port 134 communicates with the chamber 130 via an output passage 136. An exhaust passage 138 communicating with the chamber 130 and the outside is formed in the first body portion 120, and a seating portion 139 which is slightly raised from the surroundings is formed on a peripheral edge of the exhaust passage 138 on the chamber 130 side. Is formed.
[0031]
A chamber 140 is provided in the second body part 122 coaxially with the chamber 130. In FIG. 2, the left end of the chamber 140 is formed as a screw hole 142, and a pressure adjusting screw 144 (pressure adjusting member) is screwed into the screw hole 142. A first step 148 for holding one end of the spring member 146 is formed on the right end of the pressure adjusting screw 144.
[0032]
Between the first body part 120 and the second body part 122, a diaphragm 150 whose outer peripheral edge is sandwiched therebetween is interposed. The central portion of the diaphragm 150 is sandwiched between a pair of holding members 152a and 152b. A flange-shaped second step portion 154 is formed at a peripheral portion of the holding member 152a in correspondence with the first step portion 148, and the second step portion 154 holds the other end of the spring member 146. I do. On the other hand, an exhaust valve 156 (valve element) seated on the seat 139 is fixed to the right end of the holding member 152b in FIG.
[0033]
Screw holes 160 are formed in predetermined portions of the first body portion 120 and the second body portion 122. That is, the pressure reducing mechanism 106 is detachably attached to the side of the second block body 20b via the screw hole 160 with a bolt or the like.
[0034]
The pressure reducing mechanism 106 and the fluid pressure adjusting device 10 incorporating the same according to the embodiment of the present invention are basically configured as described above. Next, the operation and operation and effect thereof will be described.
[0035]
First, the fluid pressure supply source 22 is connected to the supply port 24 via a tube or the like, while the fluid pressure operation device 26 requiring a high fluid pressure is connected to the pressure adjustment port 28. Further, as shown in FIG. 3, the input port 124 of the pressure reducing mechanism 106 is connected to the first communication path 100, and the output port 134 of the pressure reducing mechanism 106 is connected to the second communication path 104. Further, the pressure adjusting screw 144 is adjusted to set the pressing force of the spring member 146 to a predetermined value.
[0036]
Here, the state in which the supply valve body 44 is seated on the seat portion 58 and is in the valve closed state as shown in FIG. 1 will be described below as an initial position.
[0037]
In the present embodiment, for example, an assist gas having a fluid pressure of 2.0 to 3.0 MPa is supplied from the fluid pressure supply source 22 to the supply port 24. As the assist gas, for example, oxygen, nitrogen gas, air or the like is used.
[0038]
In the initial position as shown in FIG. 1, 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 input port 124 of the pressure reducing mechanism 106 via the first communication path 100, and then flows into the chamber 130 via the fixed restrictor 126 and the input path 128. The pressure in the chamber 130 acts on the diaphragm 150 and opposes the spring force of the spring member 146. If the pressure in the chamber 130 rises too much, the diaphragm 150 moves to the left in FIG. 2, and accordingly, the exhaust valve 156 is separated from the seat 139 to be in a valve-open state, and is exhausted to the outside from the exhaust passage 138. .
[0039]
That is, the high-pressure fluid of 2.0 to 3.0 MPa introduced into the decompression mechanism 106 via the first communication path 100 is decompressed until the fluid with the spring force of the spring member 146 is balanced. When the spring force of the spring member 146 and the pressure of the pressure fluid are balanced, the exhaust valve 156 is closed, the first communication path 100 is closed, and finally the pressure is reduced to, for example, 0.8 MPa. .
[0040]
The depressurized pressure fluid is introduced into the air supply solenoid valve 102 through the output passage 136, the output port 134, and the second communication passage 104, and is controlled by a control signal (on / off signal) output from the control unit 96. The pilot pressure is controlled to a predetermined pressure by controlling ON / OFF of each of the air supply solenoid valve 102 and / or the exhaust solenoid valve 112.
[0041]
The pilot pressure controlled by the air supply solenoid valve 102 and / or the exhaust solenoid valve 112 is supplied to the pilot chamber 86 provided on the upper side of the diaphragm 82 via the third communication passage 114. Under the action of the pilot pressure, the diaphragm 82, the disk member 88, and the piston 72 descend integrally. As the piston 72 descends, the stem 56 presses the supply valve body 44 downward. Therefore, the supply valve body 44 is displaced downward against the spring force of the spring member 48 and the pressing force due to the secondary pressure acting on the lower surface of the piston 72, and as a result, the seal member 60 is seated. The valve is opened by separating from the portion 58 (see FIG. 4).
[0042]
Accordingly, the pressure fluid supplied to the supply port 24 is reduced to a predetermined pressure fluid via a clearance formed between the seal member 60 of the supply valve body 44 and the seating portion 58, and then the pressure control port A pressure fluid is supplied from 28 to the hydraulic device 26 side.
[0043]
As described above, the pressure receiving area differs between the upper side 72a and the lower side 72b of the piston 72. In this case, the force acting on the secondary pressure and the pressure receiving area on the lower side 72b of the piston 72 ( When the pressure due to the secondary pressure) exceeds the force acting by the pressure in the pilot chamber 86 and the pressure receiving area on the upper side 72a of the piston 72 (the pressure due to the pilot pressure), the pressing force due to the secondary pressure is applied. The diaphragm 82, the disk member 88, and the piston 72 move downward integrally. In this case, since the supply valve body 44 including the stem 56 is formed separately from the piston 72, the supply valve body 44 does not follow the upward movement thereof. Further, the supply valve element 44 is pressed in the axial direction by the spring member 48, and the seal member 60 contacts the seating portion 58, so that further movement of the supply valve element 44 in the axial direction is restricted. That is, the closed state between the spherical tip of the stem 56 and the opening 74 of the piston 72 is released, so that the pressure fluid on the pressure regulating port 28 side flows through the opening 74, the lower part of the chamber 70 divided by the piston 72. Finally, the air is exhausted to the outside through an exhaust port (not shown) through the communication passage 76 and the chamber 78.
[0044]
As described above, by displacing the diaphragm 82 and the piston 72 in the vertical direction by the pressure of the pressure fluid supplied to the pilot chamber 86, the opening and closing operation of the supply valve body 44 exerts a pressure reducing effect.
[0045]
That is, under the action of the pilot pressure introduced into the pilot chamber 86, a force is applied to the diaphragm 82, the disk member 88, and the piston 72 so as to be pressed downward integrally. When the spring force and the pressing force due to the secondary pressure acting on the lower surface of the piston 72 are balanced, the supply valve body 44 is seated on the seat portion 58 to be in the valve closed state, and the predetermined desired fluid pressure is set. The fluid is supplied to the hydraulic actuator 26 through the pressure adjusting port 28.
[0046]
As described above, since the decompression mechanism 106 of the present embodiment does not include a sliding member such as a piston, the operation is stabilized and the durability is improved.
[0047]
Further, since the pressure reducing mechanism 106 is attached to the body portion 12 in a separate configuration, the size of the pressure reducing mechanism 106 can be arbitrarily set regardless of the size of the body portion 12. For example, when the area of the diaphragm 150 constituting the pressure reducing mechanism is increased, a stable derived pressure that is not affected by the fluctuation of the supply pressure can be derived to the supply electromagnetic valve 102 and the exhaust electromagnetic valve 112. .
[0048]
Of course, in the fluid pressure adjusting device 10 incorporating the pressure reducing mechanism 106 of the present 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 106. Since the pressure is reduced, a pressure fluid having a normal pressure can be introduced into the air supply solenoid valve 102 and the exhaust solenoid valve 112 that control the pilot pressure. Therefore, it is not necessary to use specially-designed high-pressure solenoid valves as the air supply solenoid valve 102 and the exhaust solenoid valve 112, and it is possible to use a normal solenoid valve and to make a major design change. There is an advantage that the existing structure can be used as it is.
[0049]
FIG. 5 is a longitudinal sectional view along the axial direction of a fluid pressure adjusting device 10a according to another embodiment. The fluid pressure adjusting device 10 shown in FIG. 1 supplies the pressure fluid supplied to the air supply solenoid valve 102 and the exhaust solenoid valve 112 to the high pressure fluid of 2.0 to 3.0 MPa supplied to the supply port 24, and the pressure reducing mechanism 106. For example, the fluid pressure adjusting device 10a shown in FIG. 5 uses the supply air solenoid valve 102 and the exhaust solenoid valve 102 without using the pressure reducing mechanism 106. The difference is that the pressure fluid to be supplied to 112 is supplied directly from a fluid pressure supply source different from the fluid pressure supply source 22 connected to the supply port 24. The same components as those of the fluid pressure adjusting device 10 shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0050]
Specifically, as shown in FIG. 5, a fluid pressure supply source 172 is connected to the second communication passage 104 communicating with the air supply solenoid valve 102 via a pipe 170. In this case, the fluid pressure supply source 172 outputs, for example, a 0.8 MPa pressure fluid corresponding to the pressure resistance of the air supply solenoid valve 102 and the exhaust solenoid valve 112. Further, the opening portion of the second block body 20b of the first communication path 100 which has been opened due to the removal of the pressure reducing mechanism 106 is closed by the closing member 174.
[0051]
As described above, the operation of the fluid pressure adjusting device 10a does not use the pressure fluid supplied to the air supply solenoid valve 102 and the exhaust solenoid valve 112 that is depressurized using the pressure reduction mechanism 106, as described above. The only difference is that the fluid pressure is directly supplied from the fluid pressure supply source 172, and the other operations are the same as those of the fluid pressure adjusting device 10 shown in FIG.
[0052]
That is, since the decompression mechanism 106 of the present embodiment is detachably attached to the body portion 12, the configuration of the device can be constructed in various forms, and therefore, the versatility of the device can be improved. Becomes possible.
[0053]
【The invention's effect】
According to the pressure reducing mechanism and the fluid pressure adjusting device having the pressure reducing mechanism according to the present invention, the following effects can be obtained.
[0054]
That is, since the decompression mechanism does not include a sliding member such as a piston, the operation is stable and the durability is improved.
[0055]
Further, since the pressure reducing mechanism is configured to be detachable from the housing, the size of the pressure reducing mechanism can be arbitrarily set regardless of the size of the housing. For example, when the area of the diaphragm constituting the pressure reducing mechanism is increased, a stable derived pressure which is not affected by the fluctuation of the supply pressure can be derived to the control mechanism.
[0056]
Further, in the present invention, in place of the pressure reducing mechanism, the control mechanism may be provided with a second fluid pressure supply source that derives a pressure fluid having a predetermined pressure. Therefore, the versatility of the fluid pressure adjusting device can be improved.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view along an axial direction of a pressure reducing mechanism and a fluid pressure adjusting device incorporating the same according to an embodiment of the present invention.
FIG. 2 is an enlarged vertical sectional view of the pressure reducing mechanism shown in FIG.
FIG. 3 is a front view of the pressure reducing mechanism shown in FIG.
FIG. 4 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;
FIG. 5 is a longitudinal sectional view along an axial direction of a fluid pressure adjusting device according to another embodiment of the present invention.
[Explanation of symbols]
10, 10a ... fluid pressure adjusting device 12 ... body part 14 ... bonnet 20a ... first block body 20b ... second block body 22, 172 ... fluid pressure supply source 24 ... supply port 26 ... fluid pressure operation device 28 ... pressure regulation port 42, 174 ... closing member 44 ... supply valve element 48, 146 ... spring member 56 ... stem 72 ... piston 82, 150 ... diaphragm 86 ... pilot chamber 94 ... pressure sensor 100 ... first communication passage 102 ... air supply solenoid valve 104 second communication passage 106 pressure reducing mechanism 112 exhaust gas solenoid valve 120 first body portion 122 second body portion 124 input port 134 output port 138 exhaust passage 156 exhaust valve

Claims (2)

Body and
A diaphragm mounted inside a chamber formed in the body,
A spring member for pressing one surface side of the diaphragm,
A pressure adjusting member for adjusting the pressing force of the spring member;
A valve body provided on the other surface side of the diaphragm to open and close an exhaust passage under a displacement action of the diaphragm;
An input passage and an output passage are formed in communication with the chamber on the other surface side of the diaphragm, and when the fluid pressure to the input passage is larger than the set pressing force of the spring member, the diaphragm A pressure reducing mechanism, wherein the valve body is displaced to open the exhaust passage. A housing having a supply port connected to a fluid pressure supply source and a pressure adjustment port connected to a fluid pressure operating device, and displaceable inside the housing under the action of a pilot pressure controlled by a control mechanism. A valve body that is provided and shuts off the communication between the supply port and the pressure adjustment port by sitting on a seating portion, and depressurizes and adjusts the pressure fluid supplied from the fluid pressure supply source to thereby provide the fluid. In a fluid pressure regulating device for supplying pressure actuated equipment,
A decompression mechanism is detachably mounted on the housing, and the housing has an input passage for introducing a pressure fluid to the decompression mechanism, and an output passage for leading the pressure fluid decompressed by the decompression mechanism to the control mechanism. ,
The pressure reducing mechanism includes a body,
A diaphragm mounted inside a chamber formed in the body,
A spring member for pressing one surface side of the diaphragm,
A pressure adjusting member for adjusting the pressing force of the spring member;
A valve body provided on the other surface side of the diaphragm to open and close an exhaust passage under a displacement action of the diaphragm;
An input passage and an output passage are formed in communication with the chamber on the other surface side of the diaphragm, and when the fluid pressure to the input passage is larger than the set pressing force of the spring member, the diaphragm A fluid pressure adjusting device having a pressure reducing mechanism, wherein the valve body is displaced to open the exhaust passage.

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