WO2015146353A1 - リリーフ弁 - Google Patents
リリーフ弁 Download PDFInfo
- Publication number
- WO2015146353A1 WO2015146353A1 PCT/JP2015/054009 JP2015054009W WO2015146353A1 WO 2015146353 A1 WO2015146353 A1 WO 2015146353A1 JP 2015054009 W JP2015054009 W JP 2015054009W WO 2015146353 A1 WO2015146353 A1 WO 2015146353A1
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- WO
- WIPO (PCT)
- Prior art keywords
- bolt
- center
- case
- positioning plate
- relief valve
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
- F16K17/065—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure with differential piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0486—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with mechanical actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0686—Braking, pressure equilibration, shock absorbing
Definitions
- the present invention relates to a relief valve.
- JP2001-74154A discloses a relief valve capable of adjusting a relief pressure.
- the amount of compression of the spring provided between the valve body and the adjustment screw that is, the urging force acting on the valve body from the spring, is changed by changing the screwing depth of the adjustment screw screwed into the case. Can be changed. As a result, the relief pressure at which the valve body separates from the valve seat can be adjusted.
- a nut is fastened to the portion of the adjustment screw that protrudes from the end face of the case, and the adjustment screw is fixed by forming a double nut with the female screw and nut of the case.
- the adjusting screw may be rotated when the nut is fastened, and an axial force is generated in the adjusting screw. For this reason, when the adjusting screw is fixed, the urging force acting on the valve body from the spring is likely to change. Therefore, there is a problem that it is difficult to adjust the relief pressure of the relief valve as intended.
- the object of the present invention is to provide a relief valve in which the relief pressure can be easily adjusted.
- a relief valve capable of adjusting a relief pressure
- a case provided with an inflow port and an outflow port for a working fluid
- a valve seat provided in a flow path through which the working fluid passes.
- a valve body that opens and closes the valve seat and opens and closes the flow path
- a spring that biases the valve body in a direction to seat the valve body on the valve seat, and a protruding portion that protrudes from the end surface of the case
- An adjusting screw that changes the compression amount of the spring by screwing into the case and changing the distance between the valve seat and the seat surface with which the other end of the spring contacts according to the screwing depth;
- the adjustment screw has an engagement hole that engages with the protrusion of the adjustment screw so as not to rotate relative to the case.
- the adjustment screw is fixed to the end surface of the case, and the adjustment screw is in contact with only the side surface of the protrusion.
- Positioning to restrict rotation Relief valve is provided with rate and, a.
- FIG. 1 is a sectional view of a relief valve according to the first embodiment of the present invention.
- FIG. 2 is a view II of FIG.
- FIG. 3 is a view for explaining a modification of the positioning plate.
- FIG. 4 is a diagram for explaining another modification of the positioning plate.
- FIG. 5A is a diagram for explaining still another modification of the positioning plate.
- FIG. 5B is a diagram for explaining still another modification of the positioning plate.
- FIG. 6 is a cross-sectional view of a relief valve according to the second embodiment of the present invention.
- the relief valve 100 is a valve that is applied to, for example, a hydraulic device (not shown) such as an actuator or a shock absorber, and adjusts the pressure in the hydraulic device to a predetermined relief pressure.
- a hydraulic device such as an actuator or a shock absorber
- the relief valve 100 includes a case 3 provided with an inflow port 1 and an outflow port 2 for hydraulic oil, and a valve 4 provided with a flow path 4 through which hydraulic oil passes.
- the relief valve 100 is connected to the hydraulic equipment such that the inflow port 1 communicates with the pressure chamber of the hydraulic equipment and the outflow port 2 communicates with the reservoir tank of the hydraulic equipment.
- the case 3 has a cylindrical shape, and includes a stepped portion 3a that comes into contact with the end face of the valve case 5 on the valve seat 5a side, a female screw 3b into which the adjusting screw 8 is screwed, and a female screw 3c into which the proportional solenoid 9 is screwed. Provided on the inner circumference side.
- the valve case 5 is cylindrical and is inserted into the case 3 from the female screw 3c side.
- the position of the valve case 5 in the axial direction is defined in contact with the step 3 a of the case 3.
- a small diameter portion 5b and a large diameter portion 5c are provided on the inner peripheral side of the valve case 5, and annular grooves 5d and 5e are provided on the outer peripheral side. Further, a concave portion 5f is provided on an end surface of the case 3 that contacts the stepped portion 3a, and a large-diameter portion 5c is opened on the bottom surface of the concave portion 5f.
- the bottom surface of the recess 5f is a valve seat 5a on which the poppet valve 6 is seated.
- valve case 5 When the valve case 5 is in contact with the step 3 a of the case 3, the annular groove 5 d faces the inflow port 1, and the annular groove 5 e faces the outflow port 2.
- the valve case 5 is provided with a through hole 5g for communicating the annular groove 5d and the large diameter portion 5c, and a through hole 5h for communicating the annular groove 5e and the recess 5f.
- the inflow port 1 and the outflow port 2 communicate with each other via the flow path 4 constituted by the annular groove 5d, the through hole 5g, the large diameter part 5c, the recess 5f, the through hole 5h, and the annular groove 5e.
- O-rings 10 and 11 are disposed on both sides of the annular groove 5d on the outer periphery of the valve case 5 to prevent the hydraulic oil flowing in from the inflow port 1 side from leaking.
- the poppet valve 6 includes a spring receiving portion 6a with which the spring 7 abuts, a small diameter portion 6b, and a large diameter portion 6c having a larger diameter than the small diameter portion 6b and substantially the same diameter as the small diameter portion 5b of the valve case 5.
- the poppet valve 6 is inserted into the valve case 5 so that the large diameter portion 6 c is in sliding contact with the small diameter portion 5 b of the valve case 5. In a state where the poppet valve 6 is seated on the valve seat 5a, the flow path 4 is blocked.
- the pressure receiving area on the spring receiving portion 6 a side is an area obtained by subtracting the cross-sectional area of the small-diameter portion 6 b of the poppet valve 6 from the cross-sectional area of the large-diameter portion 5 c of the valve case 5.
- the pressure receiving area on the large diameter portion 6 c side is an area obtained by subtracting the cross sectional area of the small diameter portion 6 b of the poppet valve 6 from the cross sectional area of the large diameter portion 6 c of the poppet valve 6.
- the thrust acting on the poppet valve 6 is obtained by multiplying the pressure receiving area on the spring receiving portion 6a side by the pressure on the inflow port 1 side by subtracting the pressure receiving area on the large diameter portion 6c side.
- the adjusting screw 8 has a bottomed cylindrical shape and is screwed with the female screw 3b of the case 3 by a male screw 8a formed on the outer periphery. On the bottom surface inside the adjustment screw 8, a seat surface 8 b that comes into contact with the spring 7 is provided.
- an O-ring 12 for preventing hydraulic oil from leaking outside the relief valve 100 is disposed.
- the relief valve 100 can change the compression amount of the spring 7 disposed between the poppet valve 6 and the adjusting screw 8 by changing the screwing depth of the adjusting screw 8 into the case 3.
- the spring 7 biases the poppet valve 6 in the direction in which the poppet valve 6 is seated on the valve seat 5a, so that the amount of compression of the spring 7 is changed to adjust the biasing force acting on the poppet valve 6 from the spring 7.
- the thrust required for the poppet valve 6 to move away from the valve seat 5a can be adjusted. That is, the relief pressure of the relief valve 100 can be adjusted.
- the end surface of the adjusting screw 8 is provided with a protruding portion 8c that protrudes from the end surface of the case 3.
- the rotation of the adjusting screw 8 is restricted by the positioning plate 13 that engages with the protruding portion 8c, so that the relief pressure does not change after the adjustment.
- the shape of the protrusion 8c of the adjustment screw 8 in this embodiment is a regular hexagon as shown in FIG.
- the positioning plate 13 has a regular hexagonal engagement hole 13a having the same shape as the protruding portion 8c of the adjusting screw 8, and thereby engages with the protruding portion 8c of the adjusting screw 8 in a relatively non-rotatable manner.
- the adjustment screw 8 is set so that portions other than the protruding portion 8c do not protrude from the end face of the case 3 even when the screwing amount into the case 3 is minimized within the relief pressure adjustment range. For this reason, the positioning plate 13 contacts the adjustment screw 8 only on the side surface of the protruding portion 8c.
- the adjusting screw protrudes from the end surface of the case and a nut is fastened, and the case's female screw and the nut constitute a double nut to be fixed.
- the adjustment screw may be rotated when the nut is tightened, and an axial force is generated in the adjustment screw. For this reason, there is a problem that the urging force acting on the poppet valve from the spring easily changes when the adjusting screw is fixed.
- the adjusting screw 8 since the rotation of the adjusting screw 8 is restricted by the positioning plate 13 fixed to the end face of the case 3, the adjusting screw 8 is fixed without changing the screwing depth into the case 3. it can. Further, since the positioning plate 13 contacts only the side surface of the protruding portion 8c with the adjustment screw 8, no axial force is generated on the adjustment screw 8, and the biasing force of the spring 7 is prevented from changing due to the axial force. it can.
- the proportional solenoid 9 is fixed by being screwed with the female screw 3c of the case 3 by a male screw 9a.
- a cylindrical shaft case 14 is provided between the proportional solenoid 9 and the valve case 5.
- the shaft case 14 is sandwiched between the step 3 a of the case 3 and the proportional solenoid 9 together with the valve case 5.
- an O-ring 15 for preventing hydraulic oil from leaking to the outside of the relief valve 100 is disposed.
- the shaft 16 is slidably inserted into the inner periphery of the shaft case 14.
- a spring 17 is fitted on the outer periphery of the shaft 16.
- a spring receiving portion 16a is formed at the end portion of the shaft 16 on the proportional solenoid 9 side. The spring 17 is held by the end surface of the shaft case 14 and the spring receiving portion 16 a of the shaft 16.
- the relief pressure of the relief valve 100 when the proportional solenoid 9 is energized is determined by the resultant force of the urging force of the spring 7, the urging force of the spring 17, and the thrust of the proportional solenoid 9. Therefore, the relief valve 100 can variably control the relief pressure by changing the energization current of the proportional solenoid 9.
- the proportional solenoid 9 when the proportional solenoid 9 is not energized, the shaft 16 is separated from the poppet valve 6 by the reaction force of the spring 17. Therefore, the relief pressure of the relief valve 100 when the proportional solenoid 9 is not energized is determined by the biasing force of the spring 7. For this reason, for example, when the proportional solenoid 9 fails, the relief valve 100 becomes a passive relief valve. The same applies when the proportional solenoid 9 is not provided.
- the positioning plate 13 has two slot holes 13 b provided on the circumference around the rotation axis of the adjusting screw 8.
- the positioning plate 13 is fixed to the end surface of the case 3 by two bolts 40 inserted through the two slot holes 13b.
- the two female screws 3 d of the case 3 are arranged symmetrically with respect to the rotation center of the adjusting screw 8.
- the two slot holes 13b of the positioning plate 13 are arranged symmetrically with respect to the rotation center of the adjusting screw 8, that is, the center of the engagement hole 13a.
- the positioning plate 13 and the adjusting screw 8 can rotate in a range from a position where the bolt 40 abuts on one end of the slot hole 13b to a position where the bolt 40 abuts on the other end.
- the angle between the center of the bolt 40 in the state and the line passing through the center of the engagement hole 13a of the positioning plate 13 is an angle at which the positioning plate 13 and the adjusting screw 8 can rotate.
- the positioning plate 13 of the present embodiment is provided with a slot hole 13b so that the rotatable angle is 60 degrees.
- the positioning plate 13 may be reduced in size by one each. Moreover, you may make more than three each. When using three or more, it arrange
- the shape of the protrusion 8c of the adjusting screw 8 and the engagement hole 13a of the positioning plate 13 is a regular hexagon.
- the adjustment screw 8 is rotated once, the positioning plate 13 and the adjustment screw 8 are engaged at six positions every 60 degrees. According to this, the relief pressure of the relief valve 100 can be set every 60 degrees by rotating the adjusting screw 8.
- the relief valve 100 can finely adjust the relief pressure by making the shape of the protruding portion 8c of the adjusting screw 8 and the engagement hole 13a of the positioning plate 13 into a regular hexagon.
- the shape of the protrusion 8c of the adjusting screw 8 and the engagement hole 13a of the positioning plate 13 may be a regular polygon other than a regular hexagon.
- the relief pressure of the relief valve 100 can be set every 90 degrees by rotating the adjustment screw 8, and if it is a regular pentagon, the relief pressure of the relief valve 100 is set by rotating the adjustment screw 8. Can be set every 72 degrees.
- the rotation angle of the adjustment screw 8 can be freely adjusted within the above-described rotatable range. it can. Thereby, it is possible to give a degree of freedom to a range in which the relief pressure of the relief valve 100 can be adjusted.
- the slot hole 13b of the positioning plate 13 is provided so that the rotatable angle is 60 degrees. Therefore, the rotation angle of the adjustment screw 8 can be adjusted within a range of 60 degrees in a state where the adjustment screw 8 and the positioning plate 13 are engaged at a predetermined position. According to this, the rotation angle of the adjusting screw 8 can be adjusted in the entire range of 360 degrees together with the positioning plate 13 and the adjusting screw 8 being engaged at six positions every 60 degrees.
- the center of the bolt 40 and the positioning plate 13 in a state where the bolt 40 is in contact with one end of the slot hole 13b.
- the positioning plate may be used upside down.
- the case where the positioning plate is used on both the front and back sides will be described with reference to FIG.
- the shape of the protrusion 8c of the adjusting screw 8 and the engagement hole 18a of the positioning plate 18 is, for example, a regular hexagon.
- the slot hole 18b shown by a solid line in FIG. 3 indicates a hole position when the positioning plate 18 is engaged with the protruding portion 8c of the adjusting screw face up.
- a slot hole 18b indicated by a broken line indicates a hole position when the positioning plate 18 is turned over and engaged with the protruding portion 8c of the adjusting screw.
- the slot 18b of the positioning plate 18 is formed so that the angle of the bolt 40 is 30 degrees from the state where the center of the bolt 40 is positioned on the vertical bisector of one side of the regular hexagon, and the center of the engagement hole 18a
- the range up to the state where the center of the bolt 40 is located on the line passing through is provided to be the rotatable range of the positioning plate 18 and the adjusting screw 8.
- the positioning plate 18 and the adjusting screw 8 can be rotated 30 degrees counterclockwise from the state shown in FIG. Further, when the positioning plate 18 is turned over, the position of the slot hole 18b becomes a position indicated by a broken line in FIG. 3, so that the positioning plate 18 and the adjusting screw 8 can be rotated 30 degrees clockwise.
- the rotation of the positioning plate 18 and the adjusting screw 8 is achieved by combining the rotatable range when the positioning plate 18 is used face up and the rotatable range when the positioning plate 18 is used upside down.
- the possible angle is 60 degrees.
- the positioning plate 18 is rotated at six locations every 60 degrees while the adjusting screw 8 is rotated once. And the adjusting screw 8 are engaged. Therefore, according to the positioning plate 18, the rotation angle of the adjustment screw 8 can be adjusted in the entire range of 360 degrees by using both the front and back surfaces.
- the shape of the protruding portion 8c of the adjusting screw 8 and the engagement hole 18a of the positioning plate 18 is a regular n-square shape, and the positioning plate 18 is used on both the front and back surfaces, the vertical bisection of one side in the regular n-square shape.
- the slot hole 18b so as to include, the rotation angle of the adjusting screw 8 can be adjusted in the entire range of 360 degrees.
- the slot hole when the slot hole is provided so that the rotatable angle is 360 / n degrees or more, the rotation angle of the adjusting screw can be adjusted in the entire 360 degrees range even if the positioning plate is used only face up. Therefore, when both the front and back surfaces of the positioning plate are used, the slot holes may be provided so that the rotatable angle is less than 360 / n degrees.
- two female screws 3 e and 3 f are provided at predetermined intervals on the end surface of the case 3, and a bolt 40 is screwed into one of the female screws according to the rotation angle of the positioning plate 19.
- the positioning plate 19 may be fixed.
- the protrusion 8c of the adjustment screw 8 and the engagement hole 19a of the positioning plate 19 are, for example, regular squares.
- the slot hole 19b of the positioning plate 19 is formed between the center of the bolt 40 and the positioning plate 19 when the bolt 40 is in contact with one end of the slot hole 19b when the bolt 40 is screwed into one of the female screws 3e and 3f.
- the angle between the line passing through the center of the engagement hole 19a and the line passing through the center of the bolt 40 and the center of the engagement hole 19a of the positioning plate 19 when the bolt 40 is in contact with the other end of the slot hole 19b. Is provided to be 45 degrees.
- the female screws 3e and 3f are provided on the end face of the case 3 at intervals of 45 degrees around the rotation axis of the adjusting screw 8.
- the rotatable range of the positioning plate 19 and the adjusting screw 8 when the bolt 40 is screwed into the female screw 3e is 45 degrees counterclockwise. Further, the rotatable range of the positioning plate 19 and the adjusting screw 8 when the bolt 40 is screwed into the female screw 3f is 45 degrees clockwise. Therefore, by combining the case where the bolt 40 is screwed with the female screw 3e and the case where the bolt 40 is screwed with the female screw 3f, the rotatable angle of the positioning plate 19 and the adjusting screw 8 becomes 90 degrees.
- the positioning plate 19 and the adjustment screw 8 are arranged at four locations every 90 degrees while the adjustment screw 8 is rotated once. Engage. Therefore, according to the aspect shown in FIG. 4, the rotation angle of the adjusting screw 8 can be adjusted in the entire range of 360 degrees.
- the slot hole 19b is provided as described above, and two female screws 3e and 3f are provided on the end face of the case 3 at an interval of 360 / 2n degrees with the rotation axis of the adjusting screw 8 as the center, so that adjustment can be performed in all 360 degrees.
- the rotation angle of the screw 8 can be adjusted.
- the freedom of setting the relief pressure can be maximized, and the slot hole can be made small as in the case where the positioning plate is used on both the front and back surfaces. Therefore, the positioning plate can be reduced in size. In addition, since it is not necessary to turn the positioning plate over, workability when setting the relief pressure can be improved.
- the positioning plate 19 may be fixed using two bolts 40.
- the positioning plate can be further reduced in size by using the positioning plate on both the front and back sides.
- the positioning plate 20 shown by a solid line in FIG. 5A shows a state in which the positioning plate 20 is engaged with the protruding portion 8c of the adjusting screw 8 face-up when the bolt 40 is screwed into the female screw 3e.
- the positioning plate 20 indicated by a broken line shows a state in which the positioning plate 20 is turned over and engaged with the protruding portion 8 c of the adjustment screw 8.
- the positioning plate 20 shown by a solid line in FIG. 5B shows a state in which the positioning plate 20 is engaged with the protruding portion 8c of the adjusting screw 8 face up when the bolt 40 is screwed into the female screw 3f.
- the positioning plate 20 indicated by a broken line shows a state in which the positioning plate 20 is turned over and engaged with the protruding portion 8 c of the adjustment screw 8.
- the slot hole 20b of the positioning plate 20 is formed from the state where the center of the bolt 40 is positioned on the vertical bisector of one side of the regular square when the bolt 40 is screwed into the female screw 3e.
- the range up to the state where the angle from the perpendicular bisector is 22.5 degrees and the center of the bolt 40 is located on the line passing through the center of the engagement hole 20a is the rotatable range of the positioning plate 20 and the adjusting screw 8. It is provided to become.
- the positioning plate 20 and the adjusting screw 8 can rotate 22.5 degrees counterclockwise from the state shown in FIG. 5A. It becomes.
- the positioning plate 20 is turned over, the position of the slot hole 20b becomes a position indicated by a broken line in FIG. 5A, so that the positioning plate 20 and the adjusting screw 8 can rotate 22.5 degrees clockwise.
- the rotation range when the positioning plate 20 is used face up and the rotation range when the positioning plate 20 is used upside down are the center of the bolt 40 and the engagement hole.
- the angle is 22.5 degrees clockwise and counterclockwise.
- the rotation range when the positioning plate 20 is used face up and the rotation when it is used upside down are used.
- the possible range is 22.5 degrees clockwise and counterclockwise with reference to a line passing through the center of the bolt 40 and the center of the engagement hole 20a.
- the positioning plate 20 when the positioning plate 20 is used face up by screwing the bolt 40 to the female screw 3e, when using the positioning plate 20 face down by screwing the bolt 40 to the female screw 3e, when the positioning plate 20 is used with the bolt 40 screwed to 3f and the positioning plate 20 is used face-up, and the positioning plate 20 is used with the bolt 40 screwed to the female screw 3f and used face-down, the positioning plate 20 and The rotatable angle of the adjusting screw 8 is 90 degrees.
- the positioning plate 20 and the adjustment screw 8 are arranged at four positions every 90 degrees while the adjustment screw 8 is rotated once. Engage. Therefore, according to the positioning plate 20, the rotation angle of the adjustment screw 8 can be adjusted in the entire range of 360 degrees by using both the front and back surfaces.
- the shape of the protruding portion 8c of the adjusting screw 8 and the engagement hole 20a of the positioning plate 20 is a regular n-square shape, and the positioning plate 20 is used on both the front and back surfaces, the vertical bisection of one side in the regular n-square shape.
- the slot hole 20b is provided so as to be included, and two female screws 3e and 3f are provided on the end face of the case 3 at an interval of 360 / 2n degrees around the rotation axis of the adjusting screw 8, so that the entire range of 360 degrees is provided.
- the rotation angle of the adjusting screw 8 can be adjusted.
- the degree of freedom of setting the relief pressure can be maximized, and the slot 3 can be used more than when the female plate 3e, 3f is provided on the end surface of the case 3 at a predetermined interval and the positioning plate is used only face up.
- the hole can be made small. Therefore, the positioning plate can be further reduced in size.
- the rotation of the adjusting screw 8 is restricted by the positioning plate 13 fixed to the end surface of the case 3, the adjustment is performed without changing the screwing depth into the case 3.
- the screw 8 can be fixed. Further, since the positioning plate 13 contacts only the side surface of the protruding portion 8c with the adjustment screw 8, no axial force is generated on the adjustment screw 8, and the biasing force of the spring 7 is prevented from changing due to the axial force. it can. Therefore, the relief pressure of the relief valve 100 can be easily adjusted.
- the positioning plate 13 and the adjusting screw 8 are connected at a plurality of locations while the adjusting screw 8 is rotated once.
- the relief pressure of the relief valve 100 can be finely adjusted.
- the hole for fixing the positioning plate 13 with the bolt 40 is the slot hole 13b, the range from the position where the bolt 40 contacts one end of the slot hole 13b to the position where the bolt 40 contacts the other end.
- the rotation angle of the adjusting screw 8 can be adjusted. Thereby, it is possible to give a degree of freedom to a range in which the relief pressure of the relief valve 100 can be adjusted.
- the center of the bolt 40 and the positioning plate 13 in a state where the bolt 40 is in contact with one end of the slot hole 13b.
- the shape of the protruding portion 8c of the adjusting screw 8 and the engagement hole 18a of the positioning plate 18 is a regular n-square shape, and the positioning plate 18 is used on both the front and back surfaces, one side of the regular n-square shape is vertically bisected.
- the slot hole 18b so as to include, the rotation angle of the adjusting screw 8 can be adjusted in the entire range of 360 degrees.
- the center of the bolt 40 and the engagement hole of the positioning plate 19 in a state where the bolt 40 is in contact with one end.
- An angle between a line passing through the center of 19a and a line passing through the center of the bolt 40 and the center of the engagement hole 19a of the positioning plate 19 when the bolt 40 is in contact with the other end is 360 / 2n degrees or more.
- the slot hole 19b is provided as described above, and two female screws 3e and 3f are provided on the end face of the case 3 at an interval of 360 / 2n degrees with the rotation axis of the adjusting screw 8 as the center, so that adjustment can be performed in all 360 degrees.
- the rotation angle of the screw 8 can be adjusted.
- the freedom of setting the relief pressure can be maximized, and the slot hole can be made small as in the case where the positioning plate is used on both the front and back surfaces. Therefore, the positioning plate can be reduced in size. In addition, since it is not necessary to turn the positioning plate over, workability when setting the relief pressure can be improved.
- the vertical bisection of one side in the regular n-square shape A range from a state where the center of the bolt 40 is located on the line to a state where the angle of the vertical bisector is 360 / 4n degrees and the center of the bolt 40 is located on a line passing through the center of the engagement hole 20a.
- the slot hole 20b is provided so as to be included, and two female screws 3e and 3f are provided on the end face of the case 3 at an interval of 360 / 2n degrees around the rotation axis of the adjusting screw 8, so that the entire range of 360 degrees is provided.
- the rotation angle of the adjusting screw 8 can be adjusted.
- the degree of freedom of setting the relief pressure can be maximized, and the slot 3 can be used more than when the female plate 3e, 3f is provided on the end surface of the case 3 at a predetermined interval and the positioning plate is used only face up.
- the hole can be made small. Therefore, the positioning plate can be further reduced in size.
- the relief valve 200 is a passive relief valve that does not include the proportional solenoid 9. Further, the configuration of the adjusting screw is different from that of the relief valve 100. Hereinafter, the description will focus on differences from the relief valve 100, and the same components as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.
- the relief valve 200 includes a case 23 provided with an inflow port 1 and an outflow port 2 for hydraulic oil and a flow path 24 through which the hydraulic oil passes and is accommodated in the case 23.
- a case 25 a poppet valve 6 as a valve body that opens and closes a valve seat 25a provided on the valve case 25 and opens and closes the flow path 24, and a spring that biases the poppet valve 6 in a direction to seat the valve seat 25a. 7.
- the case 23 has a bottomed cylindrical shape, and a female screw 23a that is screwed into the valve case 25 is provided on the inner peripheral side. Further, a seating surface 23 b with which the spring 7 abuts is provided on the bottom surface inside the case 23.
- the valve case 25 has a bottomed cylindrical shape. A small diameter portion 25b and a large diameter portion 25c are provided on the inner peripheral side, and an annular groove 25d and a female screw 23a of the case 23 are screwed on the outer peripheral side. A screw 25e is provided. An end face on the opening side of the valve case 25 is a valve seat 25a on which the poppet valve 6 is seated.
- the annular groove 25d is provided so as to face the inflow port 1 in a state where the valve case 25 is screwed into the case 23.
- the valve case 25 is provided with a through hole 25f that allows the annular groove 25d and the large diameter portion 25c to communicate with each other.
- the inflow port 1 and the outflow port 2 communicate with each other through the flow path 24 constituted by the annular groove 25d, the through hole 25f, and the large diameter portion 25c.
- the poppet valve 6 is inserted into the valve case 25 so that the large diameter portion 6 c is in sliding contact with the small diameter portion 25 b of the valve case 25.
- the poppet valve 6 is seated on the valve seat 25a, the flow path 24 is blocked.
- the relief valve 200 of the present embodiment changes the compression amount of the spring 7 disposed between the poppet valve 6 and the seating surface 23b of the case 23 by changing the screwing depth of the valve case 25 into the case 23. be able to.
- valve case 25 has the same function as the adjustment screw 8 in the first embodiment. Thereby, the urging force acting on the poppet valve 6 from the spring 7 can be adjusted, and the pressure at which the poppet valve 6 separates from the valve seat 25a, that is, the relief pressure of the relief valve 200 can be adjusted.
- valve case 25 is provided with a regular polygonal protruding portion 25g protruding from the end surface of the case 23.
- the rotation of the valve case 25 is restricted by the positioning plate 13 that engages with the protruding portion 25g, so that the relief pressure does not change after adjustment.
- the positioning plate 13 has a regular polygonal engagement hole 13a having the same shape as the protruding portion 25g of the valve case 25, and thereby engages with the protruding portion 25g of the valve case 25 in a relatively non-rotatable manner.
- valve case 25 is set so that portions other than the protruding portion 25g do not protrude from the end face of the case 23 even when the screwing amount into the case 23 is minimized within the relief pressure adjustment range. For this reason, the positioning plate 13 contacts the valve case 25 only with the side surface of the protruding portion 25g.
- the valve case 25 since the rotation of the valve case 25 is restricted by the positioning plate 13 fixed to the end face of the case 23, the valve case is not changed without changing the screwing depth into the case 23. 25 can be fixed. Further, since the positioning plate 13 abuts only the side surface of the protruding portion 25g with the valve case 25, no axial force is generated in the valve case 25, and the biasing force of the spring 7 is prevented from changing due to the axial force. it can.
- valve case 25 functions as an adjusting screw for adjusting the relief pressure of the relief valve 200. According to this, since it is not necessary to provide an adjustment screw separately, the relief valve 200 can be reduced in size and cost can be reduced.
- the relief valves 100 and 200 are devices that are applied to hydraulic equipment, but may be applied to fluid pressure equipment that uses liquids or gases other than hydraulic oil.
- one female screw is provided in the case 3, but two or more may be provided.
- two female screws are provided in the case 3, but three or more female screws may be provided.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
Description
以下、添付図面を参照しながら本発明の第1実施形態に係るリリーフ弁100について説明する。
続いて、図6を参照しながら本発明の第2実施形態に係るリリーフ弁200について説明する。
Claims (10)
- リリーフ圧を調整可能なリリーフ弁であって、
作動流体の流入ポートおよび流出ポートが設けられたケースと、
前記作動流体が通過する流路に設けられた弁座と、
前記弁座に離着座して前記流路を開閉する弁体と、
一端が前記弁体を前記弁座に着座する方向に付勢するスプリングと、
前記ケースの端面から突出する突出部を有し、前記ケースに螺合するとともにねじ込み深さに応じて前記スプリングの他端が当接する座面と前記弁座との距離を変化させて前記スプリングの圧縮量を変化させる調整ねじと、
前記調整ねじの前記突出部と相対回転不能に係合する係合孔を有し、前記ケースの前記端面に固定されるとともに前記調整ねじとは前記突出部の側面のみと当接して前記調整ねじの回転を規制する位置決めプレートと、
を備えるリリーフ弁。 - 請求項1に記載のリリーフ弁であって、
前記調整ねじの前記突出部および前記位置決めプレートの前記係合孔の形状は、正多角形である、
リリーフ弁。 - 請求項2に記載のリリーフ弁であって、
前記位置決めプレートは、前記調整ねじの回転軸を中心とする円周上に設けられたスロット孔を有し、前記スロット孔に挿通して前記ケースに設けられためねじに螺合するボルトにより前記ケースに固定される、
リリーフ弁。 - 請求項3に記載のリリーフ弁であって、
前記スロット孔は、前記係合孔が正n角形の場合において、前記ボルトが一端に当接した状態における前記ボルトの中心と前記係合孔の中心とを通る線と、前記ボルトが他端に当接した状態における前記ボルトの中心と前記係合孔の中心とを通る線との角度が360/n度以上となるように設けられる、
リリーフ弁。 - 請求項3に記載のリリーフ弁であって、
前記スロット孔は、前記係合孔が正n角形の場合において、前記正n角形の一辺の垂直二等分線上に前記ボルトの中心が位置する状態から、前記垂直二等分線からの角度が360/2n度であって前記係合孔の中心を通る線上に前記ボルトの中心が位置する状態までの範囲を含んで設けられる、
リリーフ弁。 - 請求項5に記載のリリーフ弁であって、
前記スロット孔は、前記ボルトが一端に当接した状態における前記ボルトの中心と前記係合孔の中心とを通る線と、前記ボルトが他端に当接した状態における前記ボルトの中心と前記係合孔の中心とを通る線との角度が360/n度未満となるように設けられる、
リリーフ弁。 - 請求項3に記載のリリーフ弁であって、
前記スロット孔は、前記係合孔が正n角形の場合において、前記ボルトが一端に当接した状態における前記ボルトの中心と前記係合孔の中心とを通る線と、前記ボルトが他端に当接した状態における前記ボルトの中心と前記係合孔の中心とを通る線との角度が360/2n度以上となるように設けられ、
前記ケースは、前記調整ねじの回転軸を中心として360/2n度の間隔で前記端面に設けられた2つのめねじを有し、
前記位置決めプレートは、前記2つのめねじのいずれか一方に螺合する前記ボルトにより前記ケースに固定される、
リリーフ弁。 - 請求項3に記載のリリーフ弁であって、
前記スロット孔は、前記係合孔が正n角形の場合において、前記正n角形の一辺の垂直二等分線上に前記ボルトの中心が位置する状態から、前記垂直二等分線からの角度が360/4n度であって前記係合孔の中心を通る線上に前記ボルトの中心が位置する状態までの範囲を含んで設けられ、
前記ケースは、前記調整ねじの回転軸を中心として360/2n度の間隔で前記端面に設けられた2つのめねじを有し、
前記位置決めプレートは、前記めねじに螺合する少なくとも1つの前記ボルトにより前記ケースに固定される、
リリーフ弁。 - 請求項1に記載のリリーフ弁であって、
前記調整ねじは、前記スプリングの前記他端が当接する前記座面と一体に設けられる、
リリーフ弁。 - 請求項1に記載のリリーフ弁であって、
前記調整ねじは、前記弁座と一体に設けられる、
リリーフ弁。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/113,967 US10184581B2 (en) | 2014-03-24 | 2015-02-13 | Relief valve |
KR1020167019743A KR101859308B1 (ko) | 2014-03-24 | 2015-02-13 | 릴리프 밸브 |
CA2937138A CA2937138C (en) | 2014-03-24 | 2015-02-13 | Relief valve |
CN201580006351.6A CN105940250B (zh) | 2014-03-24 | 2015-02-13 | 溢流阀 |
EP15770407.3A EP3096052B1 (en) | 2014-03-24 | 2015-02-13 | Relief valve |
Applications Claiming Priority (2)
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JP2014-060373 | 2014-03-24 | ||
JP2014060373A JP6209472B2 (ja) | 2014-03-24 | 2014-03-24 | リリーフ弁 |
Publications (1)
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WO2015146353A1 true WO2015146353A1 (ja) | 2015-10-01 |
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PCT/JP2015/054009 WO2015146353A1 (ja) | 2014-03-24 | 2015-02-13 | リリーフ弁 |
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US (1) | US10184581B2 (ja) |
EP (1) | EP3096052B1 (ja) |
JP (1) | JP6209472B2 (ja) |
KR (1) | KR101859308B1 (ja) |
CN (1) | CN105940250B (ja) |
CA (1) | CA2937138C (ja) |
WO (1) | WO2015146353A1 (ja) |
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JP6154874B2 (ja) * | 2015-10-27 | 2017-06-28 | Kyb株式会社 | バルブ |
JP6154875B2 (ja) * | 2015-10-27 | 2017-06-28 | Kyb株式会社 | バルブ |
KR101946630B1 (ko) * | 2016-12-23 | 2019-02-11 | 주식회사 경동나비엔 | 사양 변경이 가능한 밸브 및 이를 구비한 보일러 |
JP2019158099A (ja) * | 2018-03-16 | 2019-09-19 | Kyb株式会社 | リリーフ弁 |
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JPH0365072U (ja) * | 1989-10-31 | 1991-06-25 | ||
JPH0587379U (ja) * | 1992-04-30 | 1993-11-26 | エスエムシー株式会社 | 安全電磁弁 |
JPH11201308A (ja) * | 1998-01-14 | 1999-07-30 | Shimadzu Corp | 圧力制御弁 |
JP2004100932A (ja) * | 2002-09-06 | 2004-04-02 | Teruyuki Maeda | ポペット型安全弁 |
JP2010231718A (ja) * | 2009-03-30 | 2010-10-14 | Toyota Motor Corp | 圧力調整弁 |
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US1743350A (en) * | 1926-09-13 | 1930-01-14 | Cons Ashcroft Hancock Co | Spring adjustment for valves, etc. |
US2327953A (en) * | 1940-05-25 | 1943-08-24 | Zoder Inc | Safety apparatus |
US2884952A (en) * | 1953-03-23 | 1959-05-05 | Avco Inc | Line hydraulic pressure relief valve |
PL164135B1 (pl) * | 1990-02-22 | 1994-06-30 | Quante Heinrich Berg Ing | Zawór ograniczajacy cisnienie ze stabilnym osadzeniem sprezyny PL |
US6095183A (en) * | 1998-08-31 | 2000-08-01 | Taylor; Julian S. | Safety relief valve |
JP3891738B2 (ja) | 1999-09-07 | 2007-03-14 | カヤバ工業株式会社 | 比例電磁式リリーフ弁 |
CN2713254Y (zh) * | 2004-05-20 | 2005-07-27 | 刘云峰 | 自力式流量控制阀 |
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2014
- 2014-03-24 JP JP2014060373A patent/JP6209472B2/ja active Active
-
2015
- 2015-02-13 US US15/113,967 patent/US10184581B2/en active Active
- 2015-02-13 EP EP15770407.3A patent/EP3096052B1/en not_active Not-in-force
- 2015-02-13 CN CN201580006351.6A patent/CN105940250B/zh active Active
- 2015-02-13 KR KR1020167019743A patent/KR101859308B1/ko active IP Right Grant
- 2015-02-13 WO PCT/JP2015/054009 patent/WO2015146353A1/ja active Application Filing
- 2015-02-13 CA CA2937138A patent/CA2937138C/en not_active Expired - Fee Related
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JPH0365072U (ja) * | 1989-10-31 | 1991-06-25 | ||
JPH0587379U (ja) * | 1992-04-30 | 1993-11-26 | エスエムシー株式会社 | 安全電磁弁 |
JPH11201308A (ja) * | 1998-01-14 | 1999-07-30 | Shimadzu Corp | 圧力制御弁 |
JP2004100932A (ja) * | 2002-09-06 | 2004-04-02 | Teruyuki Maeda | ポペット型安全弁 |
JP2010231718A (ja) * | 2009-03-30 | 2010-10-14 | Toyota Motor Corp | 圧力調整弁 |
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Also Published As
Publication number | Publication date |
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JP2015183765A (ja) | 2015-10-22 |
CN105940250B (zh) | 2017-10-27 |
KR101859308B1 (ko) | 2018-05-18 |
CN105940250A (zh) | 2016-09-14 |
JP6209472B2 (ja) | 2017-10-04 |
CA2937138A1 (en) | 2015-10-01 |
EP3096052B1 (en) | 2018-06-27 |
US10184581B2 (en) | 2019-01-22 |
EP3096052A4 (en) | 2017-10-25 |
CA2937138C (en) | 2018-04-10 |
KR20160099708A (ko) | 2016-08-22 |
EP3096052A1 (en) | 2016-11-23 |
US20160341324A1 (en) | 2016-11-24 |
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