WO2016117063A1 - Vanne de commande - Google Patents

Vanne de commande Download PDF

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Publication number
WO2016117063A1
WO2016117063A1 PCT/JP2015/051610 JP2015051610W WO2016117063A1 WO 2016117063 A1 WO2016117063 A1 WO 2016117063A1 JP 2015051610 W JP2015051610 W JP 2015051610W WO 2016117063 A1 WO2016117063 A1 WO 2016117063A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve body
spool valve
pressure passage
port
coil
Prior art date
Application number
PCT/JP2015/051610
Other languages
English (en)
Japanese (ja)
Inventor
仁美 飯泉
Original Assignee
株式会社 島津製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社 島津製作所 filed Critical 株式会社 島津製作所
Priority to PCT/JP2015/051610 priority Critical patent/WO2016117063A1/fr
Priority to JP2016570406A priority patent/JPWO2016117063A1/ja
Publication of WO2016117063A1 publication Critical patent/WO2016117063A1/fr

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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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given

Definitions

  • the present invention relates to a control valve used in a hydraulic circuit of an industrial vehicle or the like.
  • control valves that are widely used as those mounted on industrial vehicles such as forklifts include the following.
  • This control valve has a spool valve body that can move back and forth in a spool hole provided in the housing.
  • the spool valve body can take a neutral position that blocks between a port communicating with an actuator that is an object to be driven, a high pressure passage communicating with a hydraulic pressure supply source, and a low pressure passage communicating with a tank. Further, the spool valve body communicates one of the ports and the high-pressure passage at a position where the spool valve body is pushed from the neutral position (hereinafter referred to as a pushed position). On the other hand, the spool valve body communicates with one of the ports and the low-pressure passage at a position pulled out from the neutral position (hereinafter referred to as a pulling position). And the flow volume of a hydraulic fluid can be adjusted continuously by changing the position of a spool valve body continuously.
  • a method for detecting the moving distance of an object a method using a change in inductive reactance of a coil is known. This is provided with a plurality of outward projecting protrusions spaced apart from each other, and detects changes in the inductive reactance of the coil due to the protrusions passing in the vicinity of the coil (for example, Patent Document 1). See).
  • Patent Document 1 is suitable for detecting the rotation angle or the rotation speed of a rotating object, the moving distance of a control valve that moves linearly over a relatively short distance, such as a spool valve body of a control valve.
  • a control valve that moves linearly over a relatively short distance
  • the object of the present invention is to provide a control valve that can detect a specific position of a spool valve body without requiring a special bracket or special processing.
  • control valve according to the present invention has a configuration as described below. That is, the control valve according to the present invention has a high pressure passage communicating with the hydraulic pressure supply source, a low pressure passage communicating with the tank, at least one port communicating with the actuator, and a spool hole communicating with the high pressure passage, the low pressure passage and the port.
  • An internal housing a state in which the port communicates with the high pressure passage by moving forward and backward in a spool hole of the housing; a state in which the port communicates with the low pressure passage; and the port, the high pressure passage, and the A spool valve body having a detected element for detecting a position in a state where the low pressure passage is shut off, and a detected element of the spool valve body are inserted into the spool valve body, and the operation of the spool valve body A coil whose internal magnetic flux changes, a signal processing unit for detecting the inductive reactance of the coil, and the signal processing.
  • Part is an arithmetic processing unit for obtaining the displacement amount of the spool valve body corresponding to the inductive reactance has been detected.
  • the detected element of the spool valve body since the detected element of the spool valve body is inserted into the coil, if the detected element of the spool valve body moves with an alternating current applied to the coil, the magnetic flux inside the coil Changes, and the inductive reactance of the coil changes accordingly.
  • the specific position of the spool valve body can be detected using this inductive reactance as a parameter without requiring a special bracket or special processing.
  • the detected element has a diameter of the spool valve body and an end of the spool valve body.
  • the diameter changing portion is formed so as to gradually become smaller or larger as it approaches.
  • control valve capable of detecting a specific position of the spool valve body without requiring a special bracket or special processing.
  • the control valve is connected to, for example, a cylinder of a hydraulic actuator (not shown) that drives the lift of a forklift, and as shown in FIGS. 1 to 3, the housing 1 and the inside of the spool hole 1e of the housing 1 are connected.
  • a spool valve body 2 capable of advancing and retracting between a pushing position and a pulling position; and a biasing mechanism 3 provided on one end side of the spool valve body 2 for biasing the spool valve body 2 to a neutral position; And a coil 4 provided on the other end side of the spool valve body 2 through which the spool valve body 2 passes.
  • the control valve is a hydraulic control valve capable of controlling the flow rate between the high pressure passage 1a or the low pressure passage 1b and the first port 1c or the second port 1d by moving the spool valve body 2. It is.
  • the housing 1 includes a high-pressure passage 1a that communicates with a pump that is a working fluid supply source, a low-pressure passage 1b that communicates with a tank for storing working fluid, A first port 1c communicating with the cylinder head of the cylinder, a second port 1d communicating with the rod side of the cylinder, the high pressure passage 1a, the low pressure passage 1b, the first port 1c and the second port 1d. And a spool hole 1e communicating therewith.
  • the spool valve body 2 can advance and retreat in the spool hole 1e of the housing 1 as described above.
  • the driving force for the advancing / retreating operation is supplied from a lever (not shown) which is a manual operation unit provided at the driver's seat of the forklift.
  • the spool valve body 2 communicates the high pressure passage 1a and the first port 1c at the pushing position shown in FIG. 2, and communicates the low pressure passage 1b and the first port 1c at the pulling position shown in FIG.
  • the first annular groove 2a communicates with the low pressure passage 1b and the second port 1d at the pushing position, and the second annular groove 2b communicates with the high pressure passage 1a and the second port 1d at the pulling position. Is provided on the outer periphery.
  • the first annular groove 2a does not communicate with either the high-pressure passage 1a or the low-pressure passage 1b in the neutral position shown in FIG. 1, but communicates only with the first port 1c.
  • the second annular groove 2b does not communicate with either the high-pressure passage 1a or the low-pressure passage 1b in the neutral position shown in FIG. 1, but communicates only with the second port 1d.
  • a retainer receiver 2 c for attaching the urging mechanism 3 is provided at one end of the spool valve body 2.
  • the other end of the spool valve body 2 is provided with a diameter changing portion 2d formed by gradually reducing the diameter toward the tip.
  • the urging mechanism 3 includes a first retainer 31 and a second retainer 32 that are engaged with the retainer receiver 2c, and a space between the first and second retainers 31 and 32. And a cap 34 for restricting the movement range of the first and second retainers 31 and 32.
  • the first retainer 31 is disposed on the side close to the housing 1, and comes into contact with the housing 1 under the urging force of the compression coil spring 33 when the spool valve body 2 is pulled out from the neutral position.
  • the second retainer 32 is arranged on the side far from the housing 1, and receives the urging force of the compression coil spring 33 and contacts the cap 34 when the spool valve body 2 is pushed in from the neutral position.
  • the compression coil spring 33 applies an elastic urging force that separates the first and second retainers 31 and 32 from each other. Due to the action of the compression coil spring 33, the spool valve body 2 assumes a neutral position when no operation is applied to the lever.
  • the cap 34 covers the first retainer 31, the second retainer 32, and the compression coil spring 33, and the second retainer 32 is not separated from the housing 1 beyond a predetermined position. The operating range of the retainer 32 is restricted.
  • the coil 4 is attached to the housing 1 via a cover plate 41 as shown in FIGS.
  • the diameter changing portion 2d of the spool valve body 2 passes through the inside of the coil 4.
  • the coil 4 is connected to an AC power supply 5 as shown in FIG.
  • the end of the diameter changing portion 2d on the side far from the housing 1 is at the intermediate portion in the axial direction of the coil 4. To be located. That is, when the spool valve body 2 moves to the push position side, the magnetic flux inside the coil 4 generated when the coil 4 is energized becomes small.
  • the entire diameter changing portion 2d is positioned outside the coil 4 as shown in FIG. That is, when the spool valve body 2 moves to the pulling position side, the magnetic flux inside the coil 4 generated when the coil 4 is energized increases.
  • the resistance measuring device 6 is connected to the coil 4 in parallel as shown in FIG.
  • the resistance measuring device 6 includes an operational amplifier 61 that amplifies a potential difference between both sides of the coil 4, a filter circuit unit 62 that removes noise from a signal output from the operational amplifier 61, and an alternating current output from the filter circuit unit 62 as a direct current.
  • a calculation unit 64 for obtaining the position of the body 2 is provided.
  • the calculation unit 64 uses what is known as a microcomputer system having a CPU, a memory, an input / output interface, and the like.
  • the CPU reads and executes a program stored in a predetermined area of the memory. It works by doing.
  • a display device for visualizing and displaying the position of the spool valve body 2 is connected to the input / output interface.
  • the CPU reads and executes the program to perform the following processing. That is, the AC voltage applied to the coil 4 by the AC power source 5, the frequency of the AC current supplied from the AC power source 5, and the electrical resistance of the coil 4 are known, and are output from the smoothing circuit unit 63 to the control unit 64.
  • the resistance measuring device 6 functions as a signal processing unit that detects the inductive reactance of the coil.
  • the resistance measuring device 6 also functions as an arithmetic processing unit that obtains the displacement amount from the position of the spool valve body 2, in other words, from the neutral position. Since the inductive reactance is proportional to the magnetic flux inside the coil 4, it corresponds to the amount of displacement from the neutral position of the spool valve body 2 as shown in FIG.
  • the inductive reactance corresponding to the position of the representative spool valve body 2 is measured in advance and stored as a position table, and when used, the spool valve body is referred to by performing interpolation calculation with reference to the position table using the inductive reactance as a parameter. 2 position can be detected. That is, it is possible to detect the opening degree as a valve that communicates between the pump or tank and the first or second port 1c, 1d in the pushing position or the pulling position and shuts off in the neutral position.
  • FIG. 6 is a flowchart.
  • an inductive reactance is obtained using the magnitude of the input DC voltage as a parameter (S1), and then spooling is performed by referring to the position table using the obtained inductive reactance as a parameter.
  • the position of the valve body 2 is obtained (S2). Then, in order to visualize and display the obtained position of the spool valve body 2, a signal indicating this position is output to the display device (S3).
  • the spool valve body 2 is measured by measuring the inductive reactance of the coil 4 through which the diameter changing portion 2d of the spool valve body 2 is inserted without requiring a special bracket or special processing. The amount of displacement from the position, that is, the neutral position can be detected.
  • the diameter changing portion 2d of the spool valve body 2 passes through the inside of the coil 4 and the displacement is obtained using the inductive reactance of the coil 4 as a parameter, a special configuration is adopted for the spool valve body 2.
  • a configuration for detecting the amount of displacement from the neutral position of the spool valve body 2 can be realized without doing so.
  • the inductive reactance of the coil 4 is used as a parameter.
  • the amount of displacement from the neutral position can be obtained. Accordingly, the displacement amount from the neutral position of the spool valve body 2 can be easily detected.
  • the diameter changing portion formed by gradually reducing the diameter of the spool valve body as it approaches one end of the spool valve body is used as the detected element.
  • a diameter changing portion formed by gradually reducing the diameter of the spool valve body as it approaches one end of the spool valve body may be used as a detected element.
  • a groove that extends in the axial direction and gradually increases in depth as it goes in one direction may be formed at one end of the spool body, and the portion where the groove is formed may be used as a detected element.
  • a plurality of annular grooves may be intermittently formed at one end of the spool body, and a portion where the distance between the annular grooves is increased in one direction may be used as the element to be detected.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Abstract

L'invention concerne une vanne de commande, laquelle vanne comporte : un boitier ayant en son sein un passage à haute pression qui est en communication avec une source de fourniture de pression hydraulique, un passage à basse pression qui est en communication avec un réservoir, au moins un orifice qui est en communication avec un actionneur, et un trou de tiroir qui est en communication avec ledit passage à haute pression, le passage à basse pression et l'orifice ; un corps de vanne à tiroir qui comporte un élément détecté pour détecter une position et qui prend, par le déplacement vers l'avant et vers l'arrière à l'intérieur du trou de tiroir du boîtier, une configuration dans laquelle l'orifice et le passage à haute pression sont en communication, une configuration dans laquelle l'orifice et le passage à basse pression sont en communication, ou une configuration dans laquelle ledit orifice est fermé par le passage à haute pression et le passage à basse pression ; un enroulement à l'intérieur duquel l'élément détecté du corps de vanne à tiroir est inséré et dont le flux magnétique interne change avec le mouvement du corps de vanne à tiroir ; une unité de traitement du signal pour détecter la réactance induite dudit enroulement ; et une unité de calcul pour déterminer la quantité de déplacement du corps de vanne à tiroir correspondant à la réactance induite détectée par l'unité de traitement du signal.
PCT/JP2015/051610 2015-01-22 2015-01-22 Vanne de commande WO2016117063A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2015/051610 WO2016117063A1 (fr) 2015-01-22 2015-01-22 Vanne de commande
JP2016570406A JPWO2016117063A1 (ja) 2015-01-22 2015-01-22 コントロールバルブ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/051610 WO2016117063A1 (fr) 2015-01-22 2015-01-22 Vanne de commande

Publications (1)

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WO2016117063A1 true WO2016117063A1 (fr) 2016-07-28

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PCT/JP2015/051610 WO2016117063A1 (fr) 2015-01-22 2015-01-22 Vanne de commande

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JP (1) JPWO2016117063A1 (fr)
WO (1) WO2016117063A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001027359A (ja) * 1999-07-14 2001-01-30 Smc Corp 位置検出機能付き切換弁
JP2008145396A (ja) * 2006-12-13 2008-06-26 Honda Motor Co Ltd 被駆動体の位置検出装置
WO2009017196A1 (fr) * 2007-07-31 2009-02-05 Atsutoshi Goto Vanne de commande de débit et son dispositif de détection de position de bobine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60148905U (ja) * 1984-03-15 1985-10-03 三菱重工業株式会社 タ−ビンロ−タ伸び差計測装置
JP3115605U (ja) * 2005-08-09 2005-11-10 株式会社島津製作所 流体制御弁

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001027359A (ja) * 1999-07-14 2001-01-30 Smc Corp 位置検出機能付き切換弁
JP2008145396A (ja) * 2006-12-13 2008-06-26 Honda Motor Co Ltd 被駆動体の位置検出装置
WO2009017196A1 (fr) * 2007-07-31 2009-02-05 Atsutoshi Goto Vanne de commande de débit et son dispositif de détection de position de bobine

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