JP5548157B2 - Pilot relay - Google Patents

Description

  The present invention relates to a pilot relay used in a positioner or the like that performs opening control of an air-operated type control valve (valve).

  Conventionally, a positioner has been used for valve drive control, process automation, and drive control of other general industrial equipment, and the opening degree of the valve can be controlled by attaching the positioner to the valve.

  FIG. 24 shows the configuration of the main part of the positioner that enables the opening degree control of the valve. In the figure, reference numeral 100 denotes a positioner. The positioner 100 includes an electropneumatic converter 101 that converts a valve opening signal sent by an electrical signal from the host controller 200 into a pneumatic signal Pn, and the electropneumatic converter 101. It comprises a pilot relay (pressure signal amplifier) 102 that amplifies the converted air pressure signal (input air pressure) Pn and outputs it to the valve 300 as an output air pressure signal (output air pressure) Po.

  The pilot relay 102 used in such a positioner 100 includes a single-acting type that outputs one output air pressure Po for one input air pressure Pn and two output air pressures Po1 and Po2 for one input air pressure Pn. There is a double acting type that outputs. The double-acting pilot relay 102 has two output ports. When the valve 300 is normally operated, the output air pressure Po1 of the first port is made higher than the output air pressure Po2 of the second port, and the reverse operation is performed. In this case, the output air pressure Po2 of the second port is set higher than the output air pressure Po1 of the first port.

  FIG. 25 shows the structure of the double-action pilot relay disclosed in Patent Document 1. In the figure, reference numeral 401 denotes a housing, and the housing 401 has an input air pressure chamber 402, a first supply air pressure chamber 403, a second supply air pressure chamber 404, a first output air pressure chamber 405, and a second output air pressure chamber. 406, an exhaust chamber 407, and a feedback chamber 408 are provided.

  In addition, a diaphragm 409 that is displaced by an input air pressure (nozzle back pressure) Pn guided to the input air pressure chamber 402 is provided in the housing 401, and a spool (moving body) 410 is attached to the diaphragm 409 in the directions of arrows A and B. It is supported to be movable in the direction. The spool 410 includes a first opening 410a located in the first output air pressure chamber 405, a second opening 410b located in the second output air pressure chamber 406, a first opening 410a, and a second opening 410b. And an exhaust passage 410c communicating with the exhaust chamber 407.

  A seat ring 411 is provided between the first supply air pressure chamber 403 and the first output air pressure chamber 405. The seat ring 411 serves as a first partition that defines a first supply air pressure chamber 403 and a first output air pressure chamber 405. A ring wall 412 is formed on the inner wall of the housing 401 between the second supply air pressure chamber 404 and the second output air pressure chamber 406. The ring wall 412 serves as a second partition that defines a second supply air pressure chamber 404 and a second output air pressure chamber 406.

  Further, a first poppet valve 413 is provided between the first supply air pressure chamber 403 and the first output air pressure chamber 405 so as to pass through the center hole 411a of the seat ring 411 and move left and right. Yes. The first poppet valve 413 integrally includes an exhaust valve 413 a that opens and closes the first opening 410 a of the spool 410 and an air supply valve 413 b that opens and closes the center hole (first communication hole) 411 a of the seat ring 411. Have.

  A second poppet valve 414 is provided between the second supply air pressure chamber 404 and the second output air pressure chamber 406 so as to penetrate the center hole 412a of the ring wall 412 and move left and right. The second poppet valve 414 integrally includes an exhaust valve 414 a that opens and closes the second opening 410 b of the spool 410 and an air supply valve 414 b that opens and closes the center hole (second communication hole) 412 a of the ring wall 412. Have.

  Further, the first supply air pressure chamber 403 is provided with a first spring 415 that urges the first poppet valve 413 in the direction of arrow B, that is, the direction in which the air supply valve 413b closes the first communication hole 411a. ing. The second supply air pressure chamber 404 is provided with a second spring 416 that urges the second poppet valve 414 in the direction of arrow A, that is, the direction in which the air supply valve 414b closes the second communication hole 412a. .

  In this double-action pilot relay, the supply air pressure Ps is supplied to the first supply air pressure chamber 403 and the second supply air pressure chamber 404 through the air supply pipe 417, and input to the input air pressure chamber 402 through the nozzle back pressure introduction pipe 418. Air pressure Pn is introduced. Also, the output air pressure Po1 is output from the first output air pressure chamber 405 to the valve 300 through the first air output pipe 419, and the output air pressure Po2 is output from the second output air pressure chamber 406 through the second air output pipe 420 to the valve 300. Is output. The feedback chamber 408 communicates with the second output air pressure chamber 405 and is defined by a diaphragm 421 supported by the spool 410. Further, the exhaust chamber 407 communicates with the atmosphere.

  In this double-action pilot relay, when the input air pressure Pn is decreased, the diaphragm 409 moves to the arrow A side, and accordingly, the spool 410 supported by the diaphragm 409 also moves to the arrow A side. Then, the spool 410 pushes down the first poppet valve 413 against the urging force of the first spring 415 along with the movement, and accordingly, the air supply valve 413b of the first poppet valve 413 is moved to the first poppet valve 413. The communication hole 411a is opened. At this time, the first opening 410 a of the spool 410 is closed by the exhaust valve 413 a of the first poppet valve 413. On the other hand, the second poppet valve 414 is pushed up by the urging force of the second spring 416, and accordingly, the air supply valve 414b of the second poppet valve 414 closes the second communication hole 412a. At this time, the second opening 410b of the spool 410 is opened by the exhaust valve 414a of the second poppet valve 414.

  Thus, the air supplied to the first supply air pressure chamber 403 through the air supply pipe 417 is introduced into the first output air pressure chamber 405 through the first communication path 411a, and then the first air output. It is supplied to the valve 300 through the pipe 419. On the other hand, the air from the valve 300 returns to the second output air pressure chamber 406 through the second air output pipe 420 and then enters the exhaust passage 410c through the second opening 410b of the spool 410 and enters the exhaust chamber 407. To be discharged.

  On the other hand, when the input air pressure Pn is increased, the diaphragm 409 moves to the arrow B side, and accordingly, the spool 410 supported by the diaphragm 409 also moves to the arrow B side. Then, the spool 410 pushes down the second poppet valve 414 against the urging force of the second spring 416 as it moves, and accordingly, the air supply valve 414b of the second poppet valve 414 is moved to the second position. The communication hole 412a is opened. At this time, the second opening 410b of the spool 410 is closed by the exhaust valve 414a of the second poppet valve 414. On the other hand, the first poppet valve 413 is pushed up by the urging force of the first spring 415, and accordingly, the air supply valve 413b of the first poppet valve 413 closes the first communication hole 411a. At this time, the first opening 410 a of the spool 410 is opened by the exhaust valve 413 a of the first poppet valve 413.

  Thus, the air supplied to the second supply air pressure chamber 404 via the air supply pipe 417 is introduced into the second output air pressure chamber 406 through the second communication path 412a, and then the second The air is supplied to the valve 300 through the air output pipe 420. On the other hand, the air from the valve 300 returns to the first output air pressure chamber 405 through the first air output pipe 419 and then enters the exhaust passage 410 c through the first opening 410 a of the spool 410 and enters the exhaust chamber 407. To be discharged.

  In this manner, the spool 410 and the pair of poppet valves 412 and 413 are operated by the input air pressure Pn guided to the input air pressure chamber 402, and the output air pressures Po1 and Po2 amplified by the operation are changed to the air output pipes 419 and 420. And output to the valve 300. In this case, by adjusting the pressure in the decreasing direction of the input air pressure Pn, the output air pressure Po1 when the valve 300 is normally operated is adjusted. By adjusting the pressure in the increasing direction of the input air pressure Pn, the valve The output air pressure Po2 when the 300 is operated in reverse is adjusted.

  In this double-acting pilot relay, the balance pressure between the output air pressures Po1 and Po2 (the output air pressure at the point where the output air pressure Po1 and the output air pressure Po2 intersect the input air pressure Pn is adjusted (see FIGS. 18 and 19)). Therefore, a seat adjuster 422 is provided for the seat ring 411. The seat ring 411 is provided so as to be movable in the same direction as the moving direction of the spool 410, and is provided by a spring 423. It is biased toward the spool 410 side.

  The front end of the seat adjuster 422 is tapered, and the front end of the seat adjuster 422 is in contact with the seat ring 411. The seat adjuster 422 passes through the wall portion of the housing 401 and enters the output air pressure chamber 405 from the outside. Screwed in. According to this mechanism, the position of the seat ring (valve seat) 411 with respect to the air supply valve 413b of the poppet valve 413 is adjusted by adjusting the ratio of the screwing of the seat adjuster 422 to the wall portion of the housing 401, and the balance It is possible to adjust the pressure.

JP 2007-40513 A

  However, according to the balance pressure adjusting mechanism disclosed in Patent Document 1 described above, the seat ring 411 tilts and the valve seat shut-off performance deteriorates because the tip of the seat adjuster 422 is in contact with the seat ring 411. As a result, the characteristics of the pilot relay may be deteriorated.

  Further, the contact surface wears out while adjusting the balance pressure many times, and this also causes the seat ring 411 to tilt, which may deteriorate the shut-off performance of the valve seat and cause deterioration of the characteristics of the pilot relay. was there.

  The present invention has been made to solve such problems, and the object of the present invention is a pilot capable of finely adjusting the balance pressure without deteriorating the shut-off performance of the valve seat. To provide a relay.

  In order to achieve such an object, the present invention provides an input pneumatic chamber, a first supply pneumatic chamber, a second supply pneumatic chamber, a first output pneumatic chamber, and a second output pneumatic chamber formed in a housing. And an exhaust chamber, a diaphragm displaced by an input air pressure guided to the input air pressure chamber, a first opening located in the first output air pressure chamber, a second opening located in the second output air pressure chamber, An exhaust passage that communicates the first opening and the second opening with the exhaust chamber, and a movable body that is supported by the diaphragm and moves within the housing, a first supply air pressure chamber, and a first output air pressure chamber. A first exhaust valve that opens and closes the first opening of the movable body and opens and closes the first communication hole is provided to be movable through the first communication hole formed in the first partition wall that is defined. First poppet integrally having a first air supply valve And a second opening of the moving body, which is movably provided through a second communication hole formed in a second partition that defines a second supply air pressure chamber and a second output air pressure chamber. A second poppet valve that integrally has a second exhaust valve that opens and closes and a second air supply valve that opens and closes the second communication hole, and the first air supply valve is the first poppet valve. A first spring member that urges the first communication hole in a closing direction, and a second spring member that urges the second poppet valve in a direction in which the second air supply valve closes the second communication hole. The pilot relay includes a space for accommodating the first spring member and a first partition, and the first exhaust valve protrudes from a first communication hole formed in the first partition. A first poppet valve assembly that holds the first poppet valve and the first spring member in the state, and an opening facing the outside of the housing. A first poppet valve assembly is slidably mounted along the inner wall surface of the passage from the opening of the passage, and the space left at the bottom of the passage is the first output air pressure chamber. The poppet valve assembly mounting portion and the surface of the first poppet valve assembly facing the outside of the housing are in surface contact with each other, and the sliding position of the first poppet valve assembly in the poppet valve assembly mounting portion is outside the housing. The sliding position adjusting means includes a flat plate portion that is in surface contact with a surface of the first poppet valve assembly that faces the outside of the housing, and a first flat portion from the flat plate portion. A first threaded body having a projecting portion projecting on a surface opposite to the poppet valve assembly, and a first threaded portion formed on an outer peripheral surface of the projecting portion; and a first threaded body first An inner peripheral surface that is screwed to the threaded portion of the second screw and a second screw on the outer peripheral surface A second screw body having a portion and an inner peripheral surface screwed with the second screw portion of the second screw body, and attached to the housing to cover the first screw body and the second screw body And a cover, wherein the screw pitch of the second screw portion is larger than the screw pitch of the first screw portion.

  According to the present invention, the passage where the opening faces the outside of the housing is the poppet valve assembly mounting portion, and the first poppet valve assembly extends along the inner wall surface from the opening of the poppet valve assembly mounting portion. The solid is slidably mounted, and the space left at the bottom of the passage is the first output pneumatic chamber. The first poppet valve assembly has a space for accommodating the first spring member and a first partition, and projects the first exhaust valve from a first communication hole formed in the first partition. In this state, the first poppet valve and the first spring member are held. The first poppet valve assembly is in surface contact with the surface of the first poppet valve assembly facing the outside of the housing, and the sliding position of the first poppet valve assembly at the poppet valve assembly mounting portion. There is provided a slide position adjusting means for adjusting the position from the outside of the housing.

  The sliding position adjusting means includes a flat plate portion that is in surface contact with a surface facing the outside of the housing of the first poppet valve assembly, and a protrusion that protrudes from the flat plate portion to a surface opposite to the first poppet valve assembly. And a first screw body having a first screw portion formed on the outer peripheral surface of the projecting portion, and an inner peripheral surface screwed with the first screw portion of the first screw body, A second screw body having a second screw portion on the outer peripheral surface; an inner peripheral surface screwed with the second screw portion of the second screw body; and the first screw body attached to the housing and It is comprised from the cover which covers a 2nd screw body, and the screw pitch of a 2nd screw part is made larger than the screw pitch of a 1st screw part.

  In the present invention, the first poppet valve assembly is pushed by the flat plate portion of the first screw body in surface contact with the surface facing the outside of the housing, so that the inner wall surface of the poppet valve assembly mounting portion is passed through the passage. And move along. At this time, since the first poppet valve assembly slides and moves in a stable posture, the first poppet valve assembly does not tilt. Further, in the first poppet valve assembly, the first poppet valve does not tilt. As a result, the balance pressure is adjusted without changing the resistance (gap) between the first air supply valve and the first communication hole and deteriorating the shut-off performance of the valve seat while maintaining a stable posture. Is possible.

  In the sliding position adjusting means, the first screw body and the second screw body form a differential screw structure. In this differential screw structure, the screw pitch (P2) of the second screw portion formed on the outer peripheral surface of the second screw body is equal to the screw pitch (P2) of the first screw portion formed on the outer peripheral surface of the first screw body. Since it is made larger than P1), it becomes possible to set the advance / retreat amount of the first screw body finely. This makes it possible to finely adjust the balance pressure by finely setting the advance / retreat amount of the first poppet valve assembly.

  According to the present invention, the passage facing the opening to the outside of the housing is used as the poppet valve assembly mounting portion, and the first poppet valve assembly is disposed along the inner wall surface from the opening of the poppet valve assembly mounting portion. The first poppet valve assembly is slidably mounted and is in surface contact with a surface facing the outside of the housing of the first poppet valve assembly, and the sliding position of the first poppet valve assembly at the poppet valve assembly mounting portion is from the outside of the housing. Since the slide position adjustment means that can be adjusted is provided, the balance pressure can be adjusted without deteriorating the shut-off performance of the valve seat by sliding the first poppet valve assembly in a stable posture. Can be done.

  According to the present invention, the sliding position adjusting means includes a flat plate portion in surface contact with a surface facing the outside of the housing of the first poppet valve assembly, and the first poppet valve assembly from the flat plate portion. A first screw body having a protruding portion protruding to the opposite side and a first screw portion formed on the outer peripheral surface of the protruding portion, and an inner portion screwed into the first screw portion of the first screw body A second screw body having a peripheral surface, a second screw body having a second screw portion on the outer peripheral surface, an inner peripheral surface threadably engaged with the second screw portion of the second screw body, and attached to the housing Since the first screw body and the cover that covers the second screw body are formed, and the screw pitch of the second screw portion is larger than the screw pitch of the first screw portion, the first screw body and the second screw body The amount of advancement and retraction of the first poppet valve assembly is determined by the differential screw structure formed by the screw body Set Thus, it is possible to perform a fine adjustment of the balance pressure.

It is a figure which shows the structure of one Embodiment of the pilot relay (double-acting type pilot relay) which concerns on this invention. It is a figure which expands and shows the part relevant to the sliding position adjustment mechanism used for adjustment of balance pressure in this pilot relay. It is the figure which looked at this sliding position adjustment mechanism from the side surface (figure seen from the C direction in FIG. 2). It is the side view and bottom view of the 1st screw body used for this sliding position adjustment mechanism. It is the top view, side view, and bottom view of the 2nd screw body used for this sliding position adjustment mechanism. It is the top view, side sectional view, and bottom view of the cover used for this sliding position adjustment mechanism. It is the sectional side view and bottom view of a guide used for this sliding position adjustment mechanism. It is a figure explaining the attachment procedure (procedure 1) with respect to the 1st poppet valve assembly of this sliding position adjustment mechanism. It is a figure explaining the attachment procedure (procedure 2) with respect to the 1st poppet valve assembly of this sliding position adjustment mechanism. It is a figure explaining the attachment procedure (procedure 3) with respect to the 1st poppet valve assembly of this sliding position adjustment mechanism. It is a figure explaining the attachment procedure (procedure 4) with respect to the 1st poppet valve assembly of this sliding position adjustment mechanism. It is a figure explaining the attachment procedure (procedure 5) with respect to the 1st poppet valve assembly of this sliding position adjustment mechanism. It is a figure explaining the attachment procedure (procedure 6) with respect to the 1st poppet valve assembly of this sliding position adjustment mechanism. It is a figure which shows the state which loosened the 2nd screw body most in this sliding position adjustment mechanism. It is a figure which shows the state which most screwed in the 2nd screw body in this sliding position adjustment mechanism. It is a figure which shows the adjustment condition of the sliding position of the 1st poppet valve assembly in the case of making balance pressure high. It is a figure which shows the adjustment condition of the sliding position of the 1st poppet valve assembly in the case of making a balance pressure low. It is a figure showing the state where the balance pressure of output air pressure Po1 and output air pressure Po2 became high. It is a figure which shows the state in which the balance pressure of output air pressure Po1 and output air pressure Po2 became low. It is a figure which shows the example which provided the spring for rattling prevention in the 1st output air pressure chamber. It is a figure which shows the example which divided and provided the guide in the internal peripheral surface of a cover. It is a sectional side view and a front view of the guide formed as a common part when the guide is divided and provided. It is the sectional side view and bottom view of a cover at the time of providing a guide in a divided manner. It is a block diagram of the principal part of the positioner using a pilot relay. It is a figure which shows the structure of the double acting type pilot relay shown by patent document 1. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing the structure of an embodiment of a pilot relay (double-acting pilot relay) according to the present invention.

  In the figure, reference numeral 1 denotes a housing, and the housing 1 has an input air pressure chamber 2, a first supply air pressure chamber 3, a second supply air pressure chamber 4, a first output air pressure chamber 5, and a second output air pressure chamber. 6, an exhaust chamber 7 and a bias chamber 8 are formed.

  A diaphragm 9 that is displaced by an input air pressure (nozzle back pressure) Pn guided to the input air pressure chamber 2 is provided in the housing 1, and a spool (moving body) 10 is attached to the diaphragm 9 in the directions of arrows A and B. It is supported to be movable in the direction.

  The spool 10 includes a first opening 10a located in the first output air pressure chamber 5, a second opening 10b located in the second output air pressure chamber 6, a first opening 10a and a second opening 10b. And an exhaust passage 10 c communicating with the exhaust chamber 7. The exhaust passage 10c includes a through passage 10c1 that connects the first opening 10a and the second opening 10b, and exhaust holes 10c2 and 10c3 that open from the inner wall surface of the through passage 10c1 toward the exhaust chamber 7. Yes.

  In addition, a passage 11 in which the opening 11 a faces the outside of the housing 1 is provided as a first poppet valve assembly mounting portion 12 at one end of the housing 1, and the other end of the housing 1 is provided. The part is provided with a passage 13 facing the opening 13a on the outside of the housing 1 as a second poppet valve assembly mounting part.

  In the first poppet valve assembly mounting portion 12, the first poppet valve assembly 15 is slidable along the inner wall surface of the passage 11 from the opening 11 a of the passage 11 facing the outside of the housing 1. The space that is mounted and left at the bottom of the passage 11 is the first output air pressure chamber 5. The second poppet valve assembly mounting portion 14 slides along the inner wall surface of the passage 13 from the opening 13a of the passage 13 facing the outside of the housing 1. The space that can be mounted and left at the bottom of the passage 13 is the second output air pressure chamber 6.

  The first poppet valve assembly 15 has a divided structure of a cylindrical seat portion 17 and a columnar seat holding portion 18 that is detachably attached to the front surface of the seat portion 17. An internal space 19 is formed between 17 and the sheet holding portion 18. A first communication hole 17 b that allows the internal space 19 and the first output air pressure chamber 5 to communicate with each other is formed on the upper surface 17 a of the seat portion 17. The upper surface 17 a of the sheet 17 serves as a first partition that defines the first supply air pressure chamber 3 and the first output air pressure chamber 5.

  A first spring 20 is accommodated in an internal space 19 between the seat portion 17 and the seat holding portion 18, and the first poppet valve 21 is urged by the first spring 20 to move the first poppet valve 21. 17 and the sheet holding unit 18. The internal space 20 communicates with the first supply air pressure chamber 3. The first poppet valve 21 has an exhaust valve 21a at its tip, and an air supply valve 21b at its rear end.

  In this holding state, the first poppet valve 21 is urged by the first spring 20 so as to pass through the first communication hole 17b formed in the seat portion 17 and move left and right. Further, the air supply valve 21b is urged in the direction to close the first through hole 17b, and the exhaust valve 21a protrudes from the first through hole 17b. In the first poppet valve assembly 15, since the seat portion 17 and the seat holding portion 18 are divided, it is easy to incorporate the first spring 20 and the first poppet valve 21.

  The second poppet valve assembly 16 has the same configuration as the first poppet valve assembly 15. That is, the second poppet valve assembly 16 has a divided structure of a cylindrical seat portion 22 and a cylindrical seat holding portion 23 that is detachably attached to the front surface of the seat portion 22. An internal space 24 is formed between the sheet portion 22 and the sheet holding portion 23. A second communication hole 22 b for communicating the internal space 24 and the second output air pressure chamber 6 is formed on the upper surface 22 a of the seat portion 22. The upper surface 22 a of the sheet 22 serves as a second partition that defines the second supply air pressure chamber 4 and the second output air pressure chamber 6.

  A second spring 25 is accommodated in the internal space 24 between the seat part 22 and the sheet holding part 23, and the second poppet valve 26 is urged by the second spring 25 to act as the seat part. 22 and the sheet holding unit 23. The internal space 24 communicates with the second supply air pressure chamber 4. The second poppet valve 26 has an exhaust valve 26a at its tip, and an air supply valve 26b at its rear end.

  In this holding state, the second poppet valve 26 is urged by the second spring 25 so as to pass through the second communication hole 22b formed in the seat portion 22 and move left and right. Further, the air supply valve 26b is biased in a direction to close the second through hole 22b, and the exhaust valve 26a protrudes from the second through hole 22b. The second poppet valve assembly 26 also has a divided structure of the seat portion 22 and the seat holding portion 23, so that the second spring 25 and the second poppet valve 26 can be easily assembled.

  The first poppet valve assembly 15 is in surface contact with the surface of the first poppet valve assembly 15 facing the outside of the housing 1 (the bottom surface 18a of the seat holding portion 18). A sliding position adjusting mechanism 27 is provided that enables the sliding position of the first poppet valve assembly 15 in the three-dimensional mounting portion 12 to be adjusted from the outside of the housing 1. The sliding position adjusting mechanism 27 will be described later.

  For the second poppet valve assembly 16, the second poppet valve assembly 16 is attached to the second poppet valve assembly mounting portion 14, that is, from the opening 13 a facing the outside of the housing 1. After the second poppet valve assembly 16 is pushed into the passage 13, a ring-shaped stop plate 28 is attached to the opening 13 a of the passage 13. In other words, the ring surface of the stop plate 28 is brought into surface contact with the surface of the second poppet valve assembly 16 facing the outside of the housing 1 (the bottom surface 23a of the seat holding portion 23), so that the second poppet valve assembly mounting portion 14 The position of the second poppet valve assembly 16 is regulated.

  In this double-action pilot relay, the supply air pressure Ps is supplied to the first supply air pressure chamber 3, the second supply air pressure chamber 4 and the bias chamber 8 through the air supply pipe 29, and the nozzle back pressure is introduced into the input air pressure chamber 2. An input air pressure Pn is guided through the tube 30. Further, the output air pressure Po1 is output from the first output air pressure chamber 5 to the valve 300 through the first air output pipe 31, and the output air pressure Po2 is output from the second output air pressure chamber 6 through the second air output pipe 32 to the valve 300. Is output.

  The bias chamber 8 is provided between the input air pressure chamber 2 and the exhaust chamber 7, is adjacent to the input air pressure chamber 2 through the diaphragm 9, and is adjacent to the exhaust chamber 7 through the diaphragm 33. Similar to the diaphragm 9, the diaphragm 33 is provided between the housing 1 and the spool 10 and supports the spool 10. Further, the exhaust chamber 7 communicates with the atmosphere, and O-rings 34 and 35 are attached to both ends of the spool 10 between the housing 1. Further, O-rings 36 and 37 are also mounted between the seat portion 17 and the seat holding portion 18 of the first poppet valve assembly 15 between the housing 1 and the seat portion 17 and the seat holding portion 18. Further, O-rings 38 and 39 are mounted between the seat portion 22 and the seat holding portion 23 of the second poppet valve assembly 16 with the housing 1.

  In this double-action pilot relay, when the input air pressure Pn is decreased, the diaphragm 9 moves to the arrow A side, and accordingly, the spool 10 supported by the diaphragm 9 also moves to the arrow A side. Then, the spool 10 pushes down the first poppet valve 21 against the urging force of the first spring 20 along with the movement, and accordingly, the air supply valve 21b of the first poppet valve 21 is moved to the first poppet valve 21. The communication hole 17b is opened. At this time, the first opening 10 a of the spool 10 is closed by the exhaust valve 21 a of the first poppet valve 21. On the other hand, the second poppet valve 26 is pushed up by the urging force of the second spring 25, and the air supply valve 26b of the second poppet valve 26 closes the second communication hole 22b accordingly. At this time, the second opening 10 b of the spool 10 is opened by the exhaust valve 26 a of the second poppet valve 26.

  As a result, the air supplied to the first supply air pressure chamber 3 through the air supply pipe 29 enters the internal space 19 of the first poppet valve assembly 15, passes through the first communication passage 17 b, and outputs the first output. After being introduced into the pneumatic chamber 5, it is supplied to the valve 300 through the first air output pipe 31. On the other hand, the air from the valve 300 passes through the second air output pipe 32 and returns to the second output air pressure chamber 6, then enters the exhaust passage 10 c through the second opening 10 b of the spool 10, and enters the exhaust chamber 7. To be discharged.

  On the other hand, when the input air pressure Pn is increased, the diaphragm 9 moves to the arrow B side, and accordingly, the spool 10 supported by the diaphragm 9 also moves to the arrow B side. Then, the spool 10 pushes down the second poppet valve 26 against the urging force of the second spring 25 along with the movement thereof, and the air supply valve 26b of the second poppet valve 26 moves along with the second poppet valve 26. The communication hole 22b is opened. At this time, the second opening 10 b of the spool 10 is closed by the exhaust valve 26 a of the second poppet valve 26. On the other hand, the first poppet valve 21 is pushed up by the urging force of the first spring 20, and accordingly, the air supply valve 21b of the first poppet valve 21 closes the first communication hole 17b. At this time, the first opening 10 a of the spool 10 is opened by the exhaust valve 21 a of the first poppet valve 21.

  Thus, the air supplied to the second supply air pressure chamber 4 through the air supply pipe 29 enters the internal space 24 of the second poppet valve assembly 16 and passes through the second communication path 22b to the second. After being introduced into the output air pressure chamber 6, the air is supplied to the valve 300 through the second air output pipe 32. On the other hand, the air from the valve 300 passes through the first air output pipe 31 and returns to the first output air pressure chamber 5, then enters the exhaust passage 10 c through the first opening 10 a of the spool 10, and enters the exhaust chamber 7. To be discharged.

  In this way, the spool 10 and the pair of poppet valves 21 and 26 are operated by the input air pressure Pn guided to the input air pressure chamber 2, and the output air pressures Po1 and Po2 amplified by the operation are changed to the air output pipes 31 and 32, respectively. And output to the valve 300. In this case, by adjusting the pressure in the decreasing direction of the input air pressure Pn, the output air pressure Po1 when the valve 300 is normally operated is adjusted. By adjusting the pressure in the increasing direction of the input air pressure Pn, the valve The output air pressure Po2 when the 300 is operated in reverse is adjusted.

(Sliding position adjustment mechanism)
In this double-action pilot relay, a mechanism for adjusting the balance pressure between the output air pressures Po1 and Po2 is necessary. For this reason, the first poppet valve assembly 15 is not connected to the first poppet valve assembly 15. A sliding position adjusting mechanism 27 is provided that enables adjustment of the 15 sliding positions from the outside of the housing 1.

  As shown in FIG. 2 in an enlarged manner, the sliding position adjusting mechanism 27 faces the surface (the bottom surface 18a of the seat holding portion 18) facing the outside of the housing 1 of the first poppet valve assembly 15. The first screw body 40 is in contact with the first screw body 40. The first screw body 40 has an inner peripheral surface that engages with the first screw portion 40a formed on the outer peripheral surface. The second screw portion 41a is provided on the outer peripheral surface. And a second screw body 41 having an inner peripheral surface that engages with the second screw portion 41a of the second screw body 41, and the first screw body 40 and the second screw body attached to the housing 1 The cover 42 covers the screw body 41.

  In the sliding position adjusting mechanism 27, the tip 41b of the second screw body 41 protrudes outward through the upper surface 42a of the cover 42, and the second screw body 41 protruding to the upper surface 42a of the cover 42. After the adjustment of the position of the first screw body 40 by rotating the second screw body 41 (described later), a rotation-preventing nut 43 is fastened to the front end portion 41b. As shown in FIG. 3, a minus groove 41e is formed at the tip 41b of the second screw body 41 so that the second screw body 41 can be rotated using a tool. In addition, a ring-shaped guide 44 is fitted into the inner peripheral surface 42c of the opening 42b on the housing 1 side of the cover 42 as a separate member. The cover 42 is attached to the housing 1 using screws 45 and 45.

  4A and 4B are a side view and a bottom view of the first screw body 40, respectively. The first screw body 40 has an integrated structure of a disk-shaped flat plate portion 40-1 and a protruding portion 40-2 protruding from one surface of the flat plate portion 40-1. A first screw portion 40a is formed on the outer peripheral surface 40b. Further, guide pins 40d1 and 40d2 are formed on the outer peripheral surface 40c of the flat plate portion 40-1 as large-diameter portions protruding in the radial direction. The guide pins 40d1 and 40d2 are provided at positions facing each other. In the first screw body 40, the bottom surface 40 e of the flat plate portion 40-1 comes into surface contact with the surface (the bottom surface 18 a of the seat holding portion 18) facing the outside of the housing 1 of the first poppet valve assembly 15.

  5A, 5B, and 5C are a top view, a side sectional view, and a bottom view of the second screw body 41, respectively. The second screw body 41 is a cylindrical screw body, and a screw hole 41e dug from the bottom surface 41d is formed at the center thereof. The first screw portion 40a of the first screw body 40 is screwed into the screw hole 41e. Further, as described above, the second screw portion 41 is formed on the outer peripheral surface of the second screw body 41, and the minus groove 41 c is formed on the tip portion 41 b of the second screw body 41. . Here, when the screw pitch of the second screw portion 41a of the second screw body 41 is P2, and the screw pitch of the first screw portion 40a of the first screw body 40 is P1, the screw pitch of the second screw portion 41a. P2 is larger than the screw pitch P1 of the first screw portion 40a.

  6A, 6B, and 6C are a top view, a side sectional view, and a bottom view of the cover 42, respectively. The cover 42 has two step holes 42-1 and 42-2 and a through hole 42-3. The diameter decreases in the order of the first step hole 42-1, the second step hole 42-2, and the through hole 42-3. The first step hole 42-1 is a step hole into which the guide 44 is fitted, and the second step hole 42-2 constitutes a guide part together with the guide 44 fitted into the first step hole 42-1. It is a step hole. In this case, the second step hole 42-2 corresponds to the first guide in the present invention, and the guide 44 fitted into the first step hole 42-2 corresponds to the second guide.

  Alignment grooves 42d1 and 4d2 are formed on the inner peripheral surface of the first step hole 42-1. The protrusions 44c1 and 44c2 (see FIG. 7) formed on the guide 44 are engaged with each other. The second step hole 42-2 is formed with guide grooves 42e1 and 42e2 into which the guide pins 40d1 and 40d2 of the first screw body 40 are engaged. The depths of the step holes 42-1 and 42-2 are substantially equal to the thickness of the flat plate portion 40-1 of the first screw body 40. The end of the through hole 42-3 is a screw hole 42f. The second screw portion 41a of the second screw body 41 is screwed into the screw hole 42f. Further, the cover 42 is formed with flange portions 42g1 and 42g2 that are in contact with the housing 1, and attachment holes 42h1 and 42h2 for the housing 1 are formed in the flange portions 42g1 and 42g2.

  7A and 7B are a side sectional view and a bottom view of the guide 44. FIG. The guide 44 is formed with a guide hole 44a having a diameter approximately the same as that of the flat plate portion 40-1 of the first screw body 40 and slightly larger than the guide hole 44a. Guide grooves 44b1 and 44b2 are formed corresponding to 40d1 and 40d2. Further, convex portions 44 c 1 and 44 c 2 are formed on the outer periphery of the guide 44, and the thickness of the guide 44 is substantially equal to the thickness of the flat plate portion 40-1 of the first screw body 40.

[Attaching the sliding position adjustment mechanism]
A procedure for attaching the sliding position adjusting mechanism 27 to the first poppet valve assembly 15 will be described with reference to FIGS.
[Procedure 1 (FIG. 8)]
First, the first screw body 40 is screwed into the second screw body 41 to the end to obtain a screw unit U1. That is, the first screw portion 40a of the first screw body 40 is screwed into the screw hole 41e of the second screw body 41 to the end, and the first screw body 40 and the second screw body 41 are combined. The screw unit U1.
[Procedure 2 (FIG. 9)]
Next, the screw unit U1 is screwed in until it hits the bottom surface of the first step hole 42-1 of the cover 42. That is, the second screw portion 41a of the second screw body 41 is screwed into the screw hole 42f of the cover 42, and the guide pins 40d1 and 40d2 of the first screw body 40 are the bottom surfaces of the first step holes 42-1. The entire screw unit U1 is screwed into the cover 42 until it hits.

[Procedure 3 (FIG. 10)]
Next, in a state in which the rotation of the first screw body 40 is constrained, the second screw body 41 is turned, and the guide pins 40d1 and 40d2 of the first screw body 40 are moved to the second step hole 42-2 of the cover 42. The guide grooves 42d1 and 42d2 are formed in the guide grooves 42d1 and 42d2.
[Procedure 4 (FIG. 11)]
Next, the guide 44 is fitted into the first step hole 42-1 to form the cover unit U2. At this time, the protrusions 44c1 and 44c2 of the guide 44 are fitted into the alignment grooves 42d1 and 42d2 (FIG. 6C) of the first step hole 42-1, so that the guide grooves 44b1 and 44b2 of the guide 44 (FIG. 7 (b)) and the guide grooves 42e1, 42e2 (FIG. 6C) of the second step hole 42-2 match.

[Procedure 5 (FIG. 12)]
Next, the first poppet valve assembly 15 is pushed into the first poppet valve assembly mounting portion 12 of the housing 1 by the cover unit U2. That is, the bottom surface 40e of the flat plate portion 40-1 of the first screw body 40 is brought into surface contact with the surface (the bottom surface 18a of the seat holding portion 18) facing the outside of the housing 1 of the first poppet valve assembly 15. The first poppet valve assembly 15 is pushed into the first poppet valve assembly mounting portion 12 of the housing 1 with the bottom surface 40 e of the flat plate portion 40-1 of the first screw body 40 in surface contact.

[Procedure 6 (FIG. 13)]
Next, the second screw body 41 is turned to adjust the sliding position of the first poppet valve assembly 15 in the first poppet valve assembly mounting portion 12, and finally it is fixed with a nut 43 for preventing rotation. FIG. 14 shows a state where the second screw body 41 is most loosened. FIG. 15 shows a state in which the second screw body 41 is most screwed.

  The first screw body 40 and the second screw body 41 form a differential screw structure, and when the second screw body 41 is rotated, the second screw body 40 moves. In this case, the first screw body 40 includes guide pins 40d1, 40d2 formed on the flat plate portion 40-1, guide grooves 42e1, 42e2 formed on the inner peripheral surface of the cover 42, and an inner periphery of the guide 44. The engagement with the guide grooves 44b1 and 44b2 formed on the surface restricts the rotation in the circumferential direction while guiding the movement in the axial direction.

  When adjusting the sliding position of the first poppet valve assembly 15, when the second screw body 41 is rotated, the first screw body 40 moves linearly and in parallel without being rotated. Accordingly, the first poppet valve assembly 15 also translates linearly in the passage 11 of the poppet valve assembly mounting portion 12 along its inner wall surface. During this sliding movement, the guide grooves 42e1 and 42e2 formed on the inner peripheral surface of the cover 42 and the guide grooves 44b1 and 44b2 formed on the inner peripheral surface of the guide 44 become one guide portion. 1 guides the parallel movement of the screw body 40.

[Adjustment of balance pressure using sliding position adjustment mechanism]
In this double-action pilot relay, when adjusting the balance pressure between the output air pressure Po1 and the output air pressure Po2, the sliding position adjusting mechanism 27 is used. FIG. 16 shows the adjustment state of the sliding position of the first poppet valve assembly 15 when the balance pressure is increased, and FIG. 17 shows the sliding position of the first poppet valve assembly 15 when the balance pressure is decreased. The adjustment status is shown.

[When increasing the balance pressure]
When the balance pressure is increased, the second screw body 41 is screwed into the cover 42 (FIG. 16). In this case, when the second screw body 41 is rotated in the screwing direction with respect to the cover 42, the first screw body 40 moves linearly and parallel to the spool 10 side without rotation. Along with this, the first poppet valve assembly 15 also translates linearly toward the spool 10 side.

  At this time, the first poppet valve assembly 15 is pushed by the entire flat plate portion 40-1 of the first screw body 40, while passing through the passage 11 of the poppet valve assembly mounting portion 12 along the inner wall surface thereof. Slide and move in a stable state. Therefore, during the adjustment of the sliding position, the first poppet valve assembly 15 does not tilt, and the first poppet valve 21 does not tilt in the first poppet valve assembly 15.

  When the first poppet valve assembly 15 slides and moves to the spool 10 side, the exhaust valve 21a of the first poppet valve 21 is pushed by the end face (valve seat) of the first opening 10a of the spool 10, and the first poppet valve assembly 15 is moved to the first position. The poppet valve 21 is pushed down against the biasing force of the first spring 20, and a gap between the air supply valve 21b of the first poppet valve 21 and the first communication hole 17b is widened. Thereby, the resistance between the air supply valve 21b and the first communication hole 17b is reduced, and the balance pressure between the output air pressure Po1 and the output air pressure Po2 is increased as shown in FIG.

[When reducing the balance pressure]
When lowering the balance pressure, the second screw body 41 is loosened with respect to the cover 42 (FIG. 17). In this case, when the second screw body 41 is rotated in the direction of loosening with respect to the cover 42, the first screw body 40 moves linearly and parallel to the opposite side of the spool 10 without being rotated. Along with this, the first poppet valve assembly 15 also translates linearly on the side opposite to the spool 10.

  At this time, the first poppet valve assembly 15 is supported by the entire flat plate portion 40-1 of the first screw body 40, while passing through the passage 11 of the poppet valve assembly mounting portion 12 along the inner wall surface thereof. Slide and move in a stable state. Therefore, during the adjustment of the sliding position, the first poppet valve assembly 15 does not tilt, and the first poppet valve 21 does not tilt in the first poppet valve assembly 15.

  When the first poppet valve assembly 15 slides and moves to the opposite side of the spool 10, the first poppet valve 21 is pushed up by the urging force of the first spring 20, and the air supply valve of the first poppet valve 21. The gap between 21b and the first communication hole 17b is narrowed. Thereby, the resistance between the air supply valve 21b and the first communication hole 17b is increased, and the balance pressure between the output air pressure Po1 and the output air pressure Po2 is reduced as shown in FIG.

  In this way, while maintaining a stable posture, the resistance (gap) between the air supply valve 21b and the first communication hole 17b is changed, and the balance pressure is adjusted without deteriorating the shutoff performance of the valve seat. Will be able to. In the above description, the adjustment state in the first poppet valve assembly 15 has been described. However, in the second poppet valve assembly 16, the air supply valve 26b of the second poppet valve 26 and the second communication hole are provided. The resistance (gap) between 22b also changes in the same manner.

  In the sliding position adjusting mechanism 27, the first screw body 40 and the second screw body 41 form a differential screw structure. In this case, since the screw pitch P2 of the second screw portion 41a of the second screw body 41 is larger than the screw pitch P1 of the first screw portion 40a of the first screw body 40, the second screw body 41 The first screw body 40 translates only per (P2-P1) rotation. Thereby, it is possible to finely adjust the balance pressure by finely setting the advance / retreat amount of the first screw body 40, that is, finely setting the advance / retreat amount of the first poppet valve assembly 15.

  In the above-described embodiment, as shown in FIG. 20, the first output air pressure chamber 5 has a gap between the front surface of the first poppet valve assembly 15 and the bottom surface of the first output air pressure chamber 5. A spring 46 for preventing rattling may be provided to prevent rattling during the sliding movement of the first poppet valve assembly 15 in the pressed state. By providing the rattling-preventing spring 46, the sliding movement along the inner wall surface in the passage 11 of the poppet valve assembly mounting portion 12 is further stabilized, and the first poppet valve assembly 15 has the first movement. The inclination of the poppet valve 21 is further reduced.

  In the embodiment described above, the second step hole 42-2 is formed in the cover 42, and the guide grooves 42e1 and 42e2 are formed in the step hole 42-2. The first guide is integrally formed on the surface, and the second guide 44 is fitted as a separate member on the front surface of the first guide. However, as shown in FIG. In addition, a first guide 47-1 and a second guide 47-2 may be provided as separate members.

  In this case, the first guide 47-1 and the second guide 47-2 are common parts, and the flat plate portion 40-1 including the guide pins 40d1 and 40d2 of the first screw body 40 is sandwiched between the first guide 47-1 and the second guide 47-2. The guide 47-1 and the second guide 47-2 are set on both sides thereof.

  22A and 22B are a side sectional view and a front view of a guide 47 (47-1, 47-2) formed as a common part. The guide 47 is formed in a ring shape, and a guide hole 47a having the same diameter as the flat plate portion 40-1 of the first screw body 40 and slightly larger than that is formed at the center thereof. In the guide 47, guide grooves 47b1 and 47b2 with which the guide pins 40d1 and 40d2 of the first screw body 40 are engaged are formed as notch grooves on the front surface of the guide hole 47a. Further, on the outer periphery of the guide 47, convex portions 47c1 and 47c2 that are aligned when fitted on the inner peripheral surface of the cover 42 are formed.

  23A and 23B are a side sectional view and a bottom view of the cover 42 when the guide 47 is used. In this cover 42, only the step hole 42-1 is provided, and the depth of the step hole 42-1 is increased. Alignment grooves 42d1 and 4d2 are formed on the inner peripheral surface of the step hole 42-1, and the projections 47b1 and 47b2 formed on the guide 47 are engaged, and the guide 47-1 and the guide are formed in the step hole 42-1. It is set as a guide part by fitting together with 47-2.

  In the system in which the first guide is integrally formed on the inner peripheral surface of the cover 42 and the second guide 44 is fitted as a separate member on the front surface of the first guide, the first guide is assembled when the cover unit U2 is assembled. The guide pins 40d1 and 40d2 of one screw body 40 must be dropped into the guide grooves 42e1 and 42e2 of the cover 42. If the guide portion is divided into two guides 47, the divided guide 47 is used as the first guide 47. Since it can attach so that it may surround from the side part of the screw body 40 of this, workability | operativity improves.

  In the embodiment described above, the first screw body 40 and the first poppet valve assembly 15 are separated from each other. However, the first screw body 40 and the first first poppet valve assembly 15 are separated. And may be integrated. That is, the first screw body 40 may be integrally provided on the bottom surface of the seat holding portion 18 of the first poppet valve assembly 15. If the first screw body 40 and the first first poppet valve assembly 15 are separated from each other, the seat holding portion 18 is attached to the poppet valve assembly mounting portion 12 as a single unit in the process of assembling the cover unit U2. Since the sheet holding portion 18 is not interposed in the screwing operation of the first screw body 40, the second screw body 41, and the cover 42, the workability is improved.

  In the above-described embodiment, the poppet valve assembly 15 is the first poppet valve assembly, the poppet valve assembly 16 is the second poppet valve assembly, and the sliding position relative to the poppet valve assembly 15 is used. Although the adjustment mechanism 27 is provided, the poppet valve assembly 16 is a first poppet valve assembly, the poppet valve assembly 15 is a second poppet valve assembly, and slides with respect to the poppet valve assembly 16. A position adjustment mechanism 27 may be provided.

  In the embodiment described above, the first guide is integrally formed on the inner peripheral surface of the cover 42, and the second guide 44 is fitted as a separate member on the front surface of the first guide. The first guide and the second guide may be integrally formed on the inner peripheral surface of the cover 42.

  The pilot relay of the present invention can be used as a pressure signal amplifier that amplifies an input air pressure signal, for a positioner that controls the opening of an air-operated control valve.

  DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Input air pressure chamber, 3 ... 1st supply air pressure chamber, 4 ... 2nd supply air pressure chamber, 5 ... 1st output air pressure chamber, 6 ... 2nd output air pressure chamber, 7 ... Exhaust chamber , 8 ... Bias chamber, 9 ... Diaphragm, 10 ... Spool (moving body), 10a ... First opening, 10b ... Second opening, 10c ... Exhaust passage, 10c1 ... Through passage, 10c1, 10c2 ... Exhaust hole, 11 ... passage, 11a ... opening, 12 ... first poppet valve assembly mounting portion, 13 ... passage, 13a ... opening, 14 ... second poppet valve assembly mounting portion, 15 ... first poppet valve assembly 16 ... second poppet valve assembly, 17 ... sheet portion, 17a ... upper surface, 17b ... first communication passage, 18 ... sheet holding portion, 18a ... bottom surface, 19 ... internal space, 20 ... first spring, 21 ... First poppet valve, 21a ... Exhaust valve, 21b ... Air supply , 22 ... Seat part, 22a ... Upper surface, 22b ... Second communication passage, 23 ... Seat holding part, 23a ... Bottom surface, 24 ... Internal space, 25 ... Second spring, 26 ... Second poppet valve, 26a ... Exhaust valve, 26b ... supply valve, 27 ... sliding position adjusting mechanism, 28 ... stop plate, 29 ... air supply pipe, 30 ... nozzle back pressure introduction pipe, 31 ... first air output pipe, 32 ... second Air output pipe, 33 ... Diaphragm, 34 to 39 ... O-ring, 40 ... First screw body, 40-1 ... Flat plate part, 40-2 ... Projection part, 40a ... First screw part, 40b ... Outer peripheral surface, 40c ... outer peripheral surface, 40d1, 40d2 ... guide pin, 40e ... bottom surface, 41 ... second screw body, 41a ... second screw portion, 41b ... tip portion, 41c ... minus groove, 41d ... bottom surface, 41e ... screw hole , 42 ... cover, 42-1 ... first step hole, 42-2 ... second Differential hole, 42-3 ... through hole, 42a ... upper surface, 43b ... opening, 42c ... inner peripheral surface, 42d1, 42d2 ... alignment groove, 42e1, 42e2 ... guide groove, 42f ... screw hole, 42g1, 42g2 ... 鍔42h1, 42h2 ... mounting hole, 43 ... nut, 44 ... guide, 44a ... guide hole, 44b1, 44b2 ... guide groove, 44c1, 44c2 ... convex part, 45 ... screw, 46 ... spring for preventing rattling, 47 (47-1, 47-2) ... guide, 47a ... guide hole, 47b1, 47b2 ... guide groove, 47c1, 47c2 ... convex portion.

Claims (7)

An input pneumatic chamber, a first supply pneumatic chamber, a second supply pneumatic chamber, a first output pneumatic chamber, a second output pneumatic chamber and an exhaust chamber formed in the housing;
A diaphragm displaced by an input air pressure guided to the input air pressure chamber;
The first opening located in the first output air pressure chamber, the second opening located in the second output air pressure chamber, and the first opening and the second opening communicate with the exhaust chamber. An exhaust passage, and a moving body that is supported by the diaphragm and moves within the housing;
The first supply air pressure chamber and the first output air pressure chamber are movably provided through a first communication hole formed in a first partition wall, and the moving body is provided with a first communication hole. A first poppet valve integrally having a first exhaust valve for opening and closing an opening and a first air supply valve for opening and closing the first communication hole;
The second supply air pressure chamber and the second output air pressure chamber are provided so as to be movable through a second communication hole formed in a second partition wall, and a second of the movable body is provided. A second poppet valve integrally having a second exhaust valve for opening and closing the opening and a second air supply valve for opening and closing the second communication hole;
A first spring member that biases the first poppet valve in a direction in which the first air supply valve closes the first communication hole;
A pilot relay comprising: a second spring member that biases the second poppet valve in a direction in which the second air supply valve closes the second communication hole;
A space for accommodating the first spring member and the first partition; and the first exhaust valve is protruded from the first communication hole formed in the first partition. A first poppet valve assembly holding a first poppet valve and the first spring member;
A passage having an opening facing the outside of the housing is provided, and the first poppet valve assembly is slidably mounted along the inner wall surface from the opening of the passage and is left at the bottom of the passage. A poppet valve assembly mounting portion whose space is the first output pneumatic chamber;
The first poppet valve assembly is in surface contact with a surface facing the outside of the housing, and the sliding position of the first poppet valve assembly in the poppet valve assembly mounting portion can be adjusted from the outside of the housing. Sliding position adjusting means
The sliding position adjusting means is
A flat plate portion in surface contact with a surface facing the outside of the housing of the first poppet valve assembly, a protruding portion projecting from the flat plate portion to a surface opposite to the first poppet valve assembly, and A first screw body having a first screw portion formed on the outer peripheral surface of the protruding portion;
A second screw body having an inner peripheral surface screwed with the first screw portion of the first screw body and having a second screw portion on the outer peripheral surface;
A cover having an inner peripheral surface screwed into a second screw portion of the second screw body and attached to the housing and covering the first screw body and the second screw body;
The pilot relay, wherein a screw pitch of the second screw portion is larger than a screw pitch of the first screw portion. The pilot relay according to claim 1,
The flat plate portion has a large-diameter portion protruding in a radial direction at a part of the outer peripheral surface thereof,
The cover has a guide portion that engages with a large-diameter portion of the flat plate portion on an inner peripheral surface thereof and restricts the rotation of the flat plate portion in the circumferential direction while guiding the axial movement of the flat plate portion. A pilot relay characterized by that. In the pilot relay according to claim 2,
The guide portion is
A pilot relay comprising: a first guide integrally formed on the inner peripheral surface of the cover; and a second guide fitted as a separate member on the front surface of the first guide. In the pilot relay according to claim 2,
The guide portion is
A pilot relay comprising: a first guide fitted as a separate member on the inner peripheral surface of the cover; and a second guide fitted as a separate member on the front surface of the first guide. The pilot relay according to claim 1,
The first poppet valve assembly includes:
The sheet portion formed with the first communication hole and a sheet holding portion to which the sheet portion is detachably attached are divided structure,
The pilot relay, wherein the first spring member and the first poppet valve are held between the seat portion and the seat holding portion. The pilot relay according to claim 1,
The pilot relay, wherein the first screw body and the first poppet valve assembly are integrated. The pilot relay according to claim 1,
The first output air pressure chamber is provided with a spring for preventing rattling in a state where the first output air pressure chamber is pressed by the front surface of the first poppet valve assembly and the bottom surface of the first output air pressure chamber. Features a pilot relay.

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