WO2017010272A1 - Capteur de détection de position - Google Patents

Capteur de détection de position Download PDF

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Publication number
WO2017010272A1
WO2017010272A1 PCT/JP2016/068967 JP2016068967W WO2017010272A1 WO 2017010272 A1 WO2017010272 A1 WO 2017010272A1 JP 2016068967 W JP2016068967 W JP 2016068967W WO 2017010272 A1 WO2017010272 A1 WO 2017010272A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
detection sensor
position detection
magnetic switch
movable member
Prior art date
Application number
PCT/JP2016/068967
Other languages
English (en)
Japanese (ja)
Inventor
西川嘉晃
Original Assignee
株式会社テイエルブイ
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 株式会社テイエルブイ filed Critical 株式会社テイエルブイ
Priority to JP2017528363A priority Critical patent/JP6392990B2/ja
Publication of WO2017010272A1 publication Critical patent/WO2017010272A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • G01F23/38—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using magnetically actuated indicating means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/18—Switches operated by change of liquid level or of liquid density, e.g. float switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding

Definitions

  • the present application relates to a position detection sensor that has a magnetic switch and detects the position of an object.
  • a position detection sensor position detection switch
  • the position detection sensor is provided in the liquid pumping device to detect the position of the float.
  • the float rises and falls according to the liquid level, and when the float rises to a predetermined height, the stored liquid is discharged, and when the float lowers to a predetermined height, new liquid flows in and stores. Is done.
  • the position detection sensor includes a magnetic switch, a movable member (movable shaft) containing a permanent magnet, and a contact member (coil spring) in contact with the float.
  • the contact member contacts the float and rotates as the float rises.
  • the movable member moves toward the magnetic switch. That is, as the float rises, the permanent magnet built in the movable member approaches the magnetic switch.
  • the magnetic switch detects the magnetism of the permanent magnet and turns on. Thus, it is detected that the float has reached the predetermined position.
  • the contact member rotates in the opposite direction to the above as the float descends, and the movable member moves away from the magnetic switch as the contact member rotates.
  • the distance between the magnetic switch and the permanent magnet becomes larger than a predetermined value, and the magnetic switch is turned off. That is, when the float is at a position lower than the predetermined high level, the magnetic switch is OFF.
  • the position detection sensor is exposed to high temperature.
  • the magnetic force (magnetism) of the permanent magnet gradually decreases.
  • the magnetic switch does not detect the magnetism of the permanent magnet even if the permanent magnet approaches the magnetic switch to a predetermined distance, and as a result, the position detection accuracy is impaired. there were.
  • the technology disclosed in the present application has been made in view of such circumstances, and its purpose is to suppress a decrease in position detection accuracy even when used at high temperatures in a position detection sensor using a magnetic switch. It is in.
  • the technology disclosed in the present application is provided with a permanent magnet in which a magnetic force acts on the permanent magnet separately from the permanent magnet detected by the magnetic switch.
  • the position detection sensor of the present application includes a magnetic switch and a movable member.
  • the movable member is attached with a first permanent magnet and directly or indirectly contacts an object, and moves toward the magnetic switch in accordance with the displacement of the object.
  • the position detection sensor of the present application detects the magnetism of the first permanent magnet by detecting the magnetism of the first permanent magnet when the first permanent magnet approaches a predetermined distance set to the magnetic switch by the movement of the movable member. Detect the position of an object.
  • the position detection sensor of the present application includes a second permanent magnet provided in a region that always attracts or repels the first permanent magnet.
  • the second permanent magnet that always attracts or repels the first permanent magnet is provided. That is, in the position detection sensor of the present application, the permanent magnet detected by the magnetic switch always forms a state of exerting a magnetic force with other magnets. Generally, a permanent magnet can maintain its own magnetic force by being in a state of exerting a magnetic force with other magnets. Therefore, even when the position detection sensor of the present application is used at a high temperature, it is possible to suppress the magnetic force (magnetism) of the first permanent magnet from being reduced, and it is possible to suppress a reduction in position detection accuracy. .
  • FIG. 1 is a cross-sectional view illustrating a schematic configuration of a liquid pumping apparatus according to an embodiment.
  • FIG. 2 is an enlarged cross-sectional view of the schematic configuration of the air supply valve and the exhaust valve.
  • FIG. 3 is a cross-sectional view illustrating a schematic configuration of the position detection sensor according to the embodiment.
  • the liquid pumping apparatus 1 of this embodiment is provided in, for example, a steam system, and collects high-temperature drain (condensate) generated by steam condensation and pumps it to a boiler or a waste heat utilization apparatus.
  • the liquid pumping apparatus 1 includes a casing 10 that is a sealed container, an air supply valve 20 and an exhaust valve 30, a valve operating mechanism 40, and a position detection sensor 70 according to the claims of the present application. ing.
  • the casing 10 has a main body portion 11 and a lid portion 12 coupled by bolts, and a storage space 13 in which drain (liquid) flows and is stored is formed inside.
  • Gas outlet 17 is provided.
  • the liquid inflow port 14 is provided near the upper part of the lid part 12, and the liquid discharge port 15 is provided at the lower part of the lid part 12. Both the gas inlet 16 and the gas outlet 17 are provided in the upper part of the lid 12. These liquid inlets 14 and the like are all in communication with the storage space 13.
  • the gas inlet 16 is provided with an air supply valve 20, and the gas outlet 17 is provided with an exhaust valve 30.
  • the air supply valve 20 and the exhaust valve 30 open and close the gas inlet 16 and the gas outlet 17, respectively.
  • the air supply valve 20 discharges the drain of the storage space 13 from the liquid discharge port 15 by introducing steam into the storage space 13 from the gas introduction port 16.
  • the exhaust valve 30 discharges the steam introduced into the storage space 13 from the gas discharge port 17.
  • the air supply valve 20 has a valve case 21, a valve body 22, and a lifting rod 23.
  • the valve case 21 has a through hole in the axial direction, and a valve seat 24 is formed above the through hole.
  • An opening 25 through which the through hole communicates with the outside is formed in the middle portion of the valve case 21.
  • the valve body 22 is formed in a spherical shape, and is integrally provided at the upper end of the lifting rod 23.
  • the elevating rod 23 is inserted into the through hole of the valve case 21 so as to be movable up and down. When the elevating rod 23 is raised, the air supply valve 20 is separated from the valve seat 24 and the gas inlet 16 is opened. When the elevating rod 23 is lowered, the valve body 22 is seated on the valve seat 24 and gas is supplied. The inlet 16 is closed.
  • the exhaust valve 30 has a valve case 31, a valve body 32, and a lifting rod 33.
  • the valve case 31 has a through hole in the axial direction, and a valve seat 34 is formed slightly above the through hole.
  • the valve case 31 is formed with an opening 35 through which the through hole communicates with the outside.
  • the valve body 32 is formed in a substantially hemispherical shape, and is provided integrally with the upper end of the elevating rod 33.
  • the elevating rod 33 is inserted into the through hole of the valve case 31 so as to be movable up and down.
  • the elevating rod 33 When the elevating rod 33 is raised, the exhaust valve 30 is seated on the valve seat 34 and the gas discharge port 17 is closed.
  • the elevating rod 33 is lowered, the valve body 32 is separated from the valve seat 34 and the gas is exhausted.
  • the outlet 17 is opened.
  • a valve operating rod 36 is connected to the lower end of the lifting rod 33 of the exhaust valve 30. That is, the raising / lowering rod 33 of the exhaust valve 30 moves up and down as the valve operation rod 36 moves up and down.
  • the valve operating rod 36 is attached with a continuous plate 37 that extends to a region below the lifting rod 23 of the air supply valve 20.
  • the raising / lowering rod 23 of the air supply valve 20 is pushed up by the connecting plate 37 when the valve operating rod 36 is raised, and rises.
  • the connecting plate 37 is also lowered so that it is lowered by its own weight.
  • the valve operating mechanism 40 is provided in the casing 10 and moves the valve operating rod 36 up and down to open and close the air supply valve 20 and the exhaust valve 30.
  • the valve operating mechanism 40 includes a float 41 and a snap mechanism 50.
  • the float 41 is formed in a spherical shape and has a lever 42 attached thereto.
  • the lever 42 is rotatably supported by a shaft 43 provided on the bracket 44.
  • the lever 42 is provided with a shaft 45 at the end opposite to the float 41 side.
  • the snap mechanism 50 includes a float arm 51, a sub arm 52, a coil spring 53, and two receiving members 54 and 55.
  • One end of the float arm 51 is rotatably supported by a shaft 58 provided on the bracket 59.
  • the brackets 44 and 59 are coupled to each other by screws and attached to the lid portion 12.
  • a groove 51a is formed at the other end of the float arm 51, and the shaft 45 of the lever 42 is fitted in the groove 51a. With this configuration, the float arm 51 swings about the shaft 58 as the float 41 moves up and down.
  • the float arm 51 is provided with a shaft 56.
  • the sub arm 52 has an upper end portion rotatably supported by a shaft 58 and a lower end portion provided with a shaft 57.
  • the receiving member 54 is rotatably supported on the shaft 56 of the float arm 51, and the receiving member 55 is rotatably supported on the shaft 57 of the sub arm 52.
  • a compressed coil spring 53 is attached between the receiving members 54 and 55.
  • the sub arm 52 is provided with a shaft 61, and the lower end portion of the valve operating rod 36 is connected to the shaft 61.
  • the position detection sensor 70 is provided in the upper part of the main body 11 of the casing 10 and communicates with the storage space 13 to detect the position of the float 41 that is the object, and constitutes a magnetic sensor. As shown in FIG. 3, the position detection sensor 70 includes a case 71, a magnetic switch 72, a movable member 73, a contact member 78, and two permanent magnets 74 and 80 (a first permanent magnet 74 and a second permanent magnet). 80).
  • the case 71 is formed in a substantially columnar shape extending in the front-rear direction, the front side (one end side in the column axis direction) is located in the storage space 13 in the casing 10, and the rear side (the other end side in the column axis direction) is the casing 10. Located outside of.
  • an insertion portion 71a of the movable member 73 is formed on the front side, and an accommodation portion 71b of the magnetic switch 72 is formed on the rear side. That is, the insertion part 71a and the accommodating part 71b are formed in the front and back.
  • the insertion portion 71 a is an insertion hole extending rearward from the front end of the case 71 and is formed coaxially with the case 71.
  • the insertion portion 71a and the accommodation portion 71b are partitioned by a partition wall 71c.
  • the magnetic switch 72 is fixed in the housing portion 71 b of the case 71.
  • the movable member 73 is formed in a rod shape extending in the front-rear direction (the column axis direction of the case 71).
  • the movable member 73 is inserted in the insertion part 71a of the case 71 so as to be movable (displaceable) in the front-rear direction.
  • a first permanent magnet 74 is built in and attached to the movable member 73 on the inner end side (rear end side).
  • a forked piece 71d is formed at the front end of the case 71, and a rotating plate 75 is provided on the forked piece 71d.
  • the rotating plate 75 is formed in a circular shape, and is rotatably attached to a central shaft 76 connected between the bifurcated pieces 71d. That is, the rotating plate 75 is rotatably supported by the case 71 via the central shaft 76.
  • a bifurcated piece 73a is formed at the outer end (front end) of the movable member 73, and a connecting shaft 77 is connected between the bifurcated piece 73a.
  • the connecting shaft 77 is provided through the outer edge of the rotating plate 75. That is, the rotating plate 75 is rotatably supported by the case 71 and the outer edge portion is connected to the movable member 73 via the connecting shaft 77.
  • the contact member 78 is a member that is formed in an elongated rod shape and is displaced in contact with the float 41.
  • the contact member 78 is a coil spring.
  • One end of the contact member 78 is fixed to the rotating plate 75 by press fitting, and the other end (tip) extends above the float 41.
  • the contact member 78 is configured such that the tip is in contact with the float 41 and rotates (displaces) together with the rotating plate 75 as the float 41 moves up and down. As the rotating plate 75 rotates, the movable member 73 moves in the front-rear direction.
  • the movable member 73 indirectly contacts the float 41 and moves in a direction approaching the magnetic switch 72 or moves away from the magnetic switch 72 as the float 41 is displaced. Is configured to do.
  • the position detection sensor 70 detects the magnetism of the first permanent magnet 74 and floats.
  • the position 41 is configured to be detected.
  • the position detection sensor 70 is provided with a second permanent magnet 80 different from the first permanent magnet 74.
  • the second permanent magnet 80 is always provided in a region that attracts or repels the first permanent magnet 74.
  • the second permanent magnet 80 is attached to a lateral position of the first permanent magnet 74 on the outer peripheral surface of the case 71.
  • the first permanent magnet 74 detected by the magnetic switch 72 always forms a state in which the second permanent magnet 80 exerts a magnetic force.
  • the second permanent magnet 80 is provided at a position where its own magnetism is not detected by the magnetic switch 72. That is, the second permanent magnet 80 is provided at a position where the magnetic force acts only on the first permanent magnet 74 among the magnetic switch 72 and the first permanent magnet 74.
  • the valve operating mechanism 40 is displaced as the float 41 moves up and down, and moves the valve operating rod 36 up and down to open and close the air supply valve 20 and the exhaust valve 30.
  • the float 41 is located at the bottom of the storage space 13 (state in FIG. 1).
  • the valve operating rod 36 is lowered, the air supply valve 20 is closed, and the exhaust valve 30 is open.
  • the drain flows from the liquid inlet 14 and accumulates in the storage space 13.
  • the float 41 rises.
  • the steam is discharged from the gas discharge port 17 as the drain accumulates.
  • the contact member 78 rotates counterclockwise in FIG.
  • the movable member 73 moves rearward and approaches the magnetic switch 72.
  • the first permanent magnet 74 approaches the magnetic switch 72 to a predetermined distance
  • the magnetic switch 72 detects the magnetism of the first permanent magnet 74 and turns on. Thereby, it is detected that the float 41 has risen to the second predetermined high level.
  • the valve operating rod 36 is raised by the snap mechanism 50. Thereby, the air supply valve 20 is opened and the exhaust valve 30 is closed.
  • the movable member 73 moves forward and moves away from the magnetic switch 72.
  • the distance between the first permanent magnet 74 and the magnetic switch 72 becomes longer than the predetermined distance, and the magnetic switch 72 is turned off. Thereby, it is detected that the float 41 has fallen below the second predetermined high level.
  • the position detection sensor 70 of the above embodiment includes the second permanent magnet 80 that always attracts or repels the first permanent magnet 74, in addition to the first permanent magnet 74 detected by the magnetic switch 72. I did it. That is, in the position detection sensor 70 of the above embodiment, the permanent magnet 74 detected by the magnetic switch 72 is always in a state of exerting a magnetic force with other magnets. Generally, a permanent magnet can maintain its own magnetic force by being in a state of exerting a magnetic force with other magnets. Therefore, the position detection sensor 70 of the above embodiment suppresses the magnetic force (magnetism) of the first permanent magnet 74 from being lowered even when the position detection sensor 70 is provided in the liquid pumping device 1 that stores high temperature drain and becomes high temperature. be able to. As a result, a decrease in position detection accuracy by the position detection sensor 70 can be suppressed.
  • the second permanent magnet 80 is provided at a side position of the first permanent magnet 74 on the outer peripheral surface of the case 71. As a result, it is possible to easily form a state in which the magnetic force (magnetism) of the second permanent magnet 80 does not affect the magnetic switch 72 but only the first permanent magnet 74. Therefore, it is possible to effectively suppress a decrease in position detection accuracy of the position detection sensor 70.
  • the attachment position of the 2nd permanent magnet 80 may be a position where the mutual magnetic force acts between the first permanent magnet 74 and the first permanent magnet 74 of the magnetic switch 72 and the first permanent magnet 74. It is more preferable that the position where the mutual magnetic force acts only between and.
  • the movable member 73 is in contact with the object (float 41) indirectly.
  • the movable member is in direct contact with the object. It is good also as a structure which moves with a displacement.
  • the position detection sensor 70 is used in the liquid pumping apparatus 1 .
  • the position detection sensor of the present application is not limited to this, and may be used in other apparatuses and instruments.
  • the position detection sensor of the present application may be used for a drain tank in which the float rises and falls according to the drain water level.
  • the technology disclosed in the present application is useful for a position detection sensor that has a magnetic switch and detects the position of an object.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Level Indicators Using A Float (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Abstract

L'invention concerne un capteur de détection de position 70, équipé d'un commutateur magnétique 72 et d'un élément mobile 73 auquel est fixé un premier aimant permanent 74, l'élément mobile 73 étant en contact direct ou indirect avec un sujet et se déplaçant vers le commutateur magnétique 72 en accord avec le déplacement du sujet. Dans le capteur de détection de position 70, lorsque le premier aimant permanent 74 est amené, par le mouvement de l'élément mobile 73, à s'approcher du commutateur magnétique 72 à hauteur d'une distance prescrite maximale établie à l'avance, le commutateur magnétique 72 détecte le magnétisme du premier aimant permanent 74 et devient passant. Le capteur de détection de position 70 est équipé d'un second aimant permanent 80 situé sur une région dans laquelle le second aimant permanent 80 et le premier aimant permanent 74 sont à tout moment attirés l'un vers l'autre ou repoussés l'un de l'autre.
PCT/JP2016/068967 2015-07-10 2016-06-27 Capteur de détection de position WO2017010272A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017528363A JP6392990B2 (ja) 2015-07-10 2016-06-27 位置検出センサ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-138650 2015-07-10
JP2015138650 2015-07-10

Publications (1)

Publication Number Publication Date
WO2017010272A1 true WO2017010272A1 (fr) 2017-01-19

Family

ID=57756906

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/068967 WO2017010272A1 (fr) 2015-07-10 2016-06-27 Capteur de détection de position

Country Status (2)

Country Link
JP (1) JP6392990B2 (fr)
WO (1) WO2017010272A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114113131A (zh) * 2021-12-03 2022-03-01 中科计算技术西部研究院 一种反光镜片划痕缺陷检测装置及方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53160681U (fr) * 1977-05-23 1978-12-15
JP2011238352A (ja) * 2010-04-30 2011-11-24 Nippon Aleph Corp 変位センサ
JP2013024061A (ja) * 2011-07-19 2013-02-04 Tlv Co Ltd 液体圧送装置のモニタリングシステム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53160681U (fr) * 1977-05-23 1978-12-15
JP2011238352A (ja) * 2010-04-30 2011-11-24 Nippon Aleph Corp 変位センサ
JP2013024061A (ja) * 2011-07-19 2013-02-04 Tlv Co Ltd 液体圧送装置のモニタリングシステム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114113131A (zh) * 2021-12-03 2022-03-01 中科计算技术西部研究院 一种反光镜片划痕缺陷检测装置及方法
CN114113131B (zh) * 2021-12-03 2024-04-30 中科计算技术西部研究院 一种反光镜片划痕缺陷检测装置及方法

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Publication number Publication date
JPWO2017010272A1 (ja) 2018-02-01
JP6392990B2 (ja) 2018-09-19

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