WO2019045460A1 - 레벨스위치 - Google Patents
레벨스위치 Download PDFInfo
- Publication number
- WO2019045460A1 WO2019045460A1 PCT/KR2018/010020 KR2018010020W WO2019045460A1 WO 2019045460 A1 WO2019045460 A1 WO 2019045460A1 KR 2018010020 W KR2018010020 W KR 2018010020W WO 2019045460 A1 WO2019045460 A1 WO 2019045460A1
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- WIPO (PCT)
- Prior art keywords
- sleeve
- output shaft
- chamber
- driving body
- contents
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
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- 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
Definitions
- the present invention relates to a level switch, and more particularly to a level switch for detecting an upper limit level of liquid or solid contents accumulated in a chamber even under a severe atmosphere.
- the chamber is filled with liquid or solid contents.
- a method of detecting a predetermined level of solid powder includes a first method of measuring a predetermined level of the powder by measuring the weight of the powder accumulated in the chamber, a method of measuring a predetermined level of the powder using a method such as an electromagnetic wave, an X-ray, a gamma ray, A second method of measuring a predetermined level of the powder deposited on the surface of the support, and a third method of measuring a predetermined level of the powder by the contact sensor.
- the first method is that if the density of the powder deposited in the chamber is not constant, it is not possible to accurately measure the predetermined level of powder;
- the second method is that when it is applied to a rough atmosphere, it is not reliable that electromagnetic waves, X-rays, gamma rays, light, sound waves, etc. are emitted from the generating portion to reach the receiving portion, ;
- the third method has a problem that, as disclosed in Japanese Patent Application Laid-Open No. 7-209061, it is impossible to accurately measure a predetermined level of the powder when the powder is not evenly distributed in the chamber.
- the present invention has a problem in solving the above-mentioned problems.
- the present invention provides, as an aspect thereof, an apparatus for mounting an output shaft of a driving body rotatably through an upper wall portion of a chamber for receiving liquid or solid contents and storing the liquid or solid contents and rotatably penetrating the upper wall portion of the chamber
- the first sleeve is rotatably externally fitted to the front end of the output shaft through a spring on the output shaft and a wing portion is formed on the outer circumferential surface of the first sleeve so as to be compressed in contact with the contents of the periphery of the sleeve accumulated in the chamber
- a relative rotation sensing part for sensing that relative rotation between the first sleeve and the output shaft occurs when a load greater than the elastic force of the spring is transmitted to the wing part, .
- a refrigerator comprising: an upper wall portion of a chamber receiving and storing a liquid or solid contents, the output shaft being rotatably mounted on the driving body so as to be rotatable; So that the second sleeve is circumscribed at the base end of the output shaft so as to be movable in the longitudinal direction of the output shaft while rotating together with the output shaft, And the second sleeve is provided with a cam follower body which is in sliding contact with the cam follower body so as to be slidably contacted with the cam follower body.
- the outer circumferential surface of the first sleeve has a first sleeve A wing portion for compressing while being contacted is provided, and a base portion of the second sleeve and a base portion of the output shaft And an elastic body for resiliently pressing the second sleeve toward the first sleeve is interposed between the circumscribed flanges and a contact sensor for contacting the base end of the second sleeve when the second sleeve is retracted,
- the wings are moved together with the output shaft of the driving body while compressing the contents around the first sleeve, which is accumulated in the chamber, by the contents accumulated in the chamber,
- the first sleeve receives a load in a direction opposite to the moving direction of the output shaft so that the first sleeve relatively moves with respect to the output shaft and the relative rotation sensing unit detects the relative rotation of the first sleeve and the output shaft, It is possible to accurately grasp the predetermined upper limit level of contents.
- the wing is moved together with the output shaft of the driving body while compressing the contents of the periphery of the first sleeve piled in the chamber,
- the first sleeve is subjected to a load in a direction opposite to the direction of motion of the output shaft so that the first sleeve is pivoted in a direction opposite to the direction of motion of the output shaft,
- a second sleeve having a cam follower slidingly contacted with a cam follower of the cam follower moves backward in the longitudinal direction of the output shaft while overcoming the elastic force of the elastic body so that the base end of the second sleeve contacts the contact sensor,
- the upper limit level can be grasped accurately.
- the level switch of the present invention even if the density of the contents accumulated in the chamber is not constant or is applied to a rough atmosphere, the accumulated predetermined level of contents can be accurately measured even if the contents are not evenly accumulated in the chamber.
- FIG. 1 is a conceptual diagram showing a level switch of an embodiment according to the present invention
- FIG. 2 is a view showing a state in which a relative rotation is generated with respect to the output shaft of FIG. 1,
- FIG. 3 is a conceptual diagram showing a level switch of another embodiment according to the present invention.
- FIG. 4 is a view showing a state in which a relative rotation is generated with respect to the output shaft of FIG. 3,
- Fig. 5 is a perspective view of the cam follower and the cam follower of Fig. 3,
- FIG. 6 is a conceptual diagram showing a level switch according to another embodiment of the present invention.
- FIG. 7 is a view showing a state in which the sleeve of FIG. 6 has undergone relative rotation with respect to the output shaft of FIG. 6;
- FIG. 8 is a perspective view showing the flange main body and the flange follower of FIG. 6;
- FIG. 1 shows a level switch mounted on a bracket 2 provided at the upper end of a chamber 1 for storing contents (for example, powders) by receiving liquid or solid contents and storing the contents to be dropped.
- contents for example, powders
- the level switch 100 includes a driving body 10 such as a motor mounted on the bracket 2; An output shaft (20) of the driving body (10) inserted into the chamber (1) through a through hole (3) formed in the upper end of the chamber (1) and extending horizontally; A first sleeve (not shown) which is circumscribed via a spring (50) and rotatably passes through the through hole (3) to the output shaft (20) so as to be able to rotate relative to the output shaft 40); A wing (42) provided on an outer peripheral surface of a front end of the first sleeve (40) so as to be compressed while being in contact with the contents around the first sleeve (40) accumulated in the chamber (1); And a relative rotation sensing unit 70 for sensing that a relative rotation of the first sleeve 40 with respect to the output shaft 20 has occurred.
- a driving body 10 such as a motor mounted on the bracket 2
- An output shaft (20) of the driving body (10) inserted into the chamber (1) through a through hole (3) formed in the upper end of
- one end of the spring 50 may be fixed to the first sleeve 40, and the other end of the spring 50 may be fixed to the output shaft 20.
- slot grooves extending in the circumferential direction are formed in either one of the first sleeve 40 and the output shaft 20 and the other one of the first sleeve 40 and the output shaft 20
- the protruding pieces being inserted into the slot groove so as to be movable along the slot groove so that both ends of the pair of springs are inserted into the slot groove with the protruded piece therebetween, Or may be in contact with one side wall or the other side wall.
- first sleeve 40 is described as being circumscribed around the front end of the output shaft 20 via the spring 50 on the output shaft 20 in the above description of the embodiment, And the spring 50 may be interposed between the first sleeve 40 and the output shaft 20 in a state where the first sleeve 40 is circumscribed only on a part of the output shaft 20.
- the relative rotation sensing unit 70 includes a contact sensor, a proximity sensor, a photoelectric sensor, an electromagnetic sensor, and the like, which are interposed between the first sleeve 40 and the output shaft 20, .
- the relative rotation sensing unit 70 may be provided with a proximity sensor (provided in the second projection) provided on any one of the second projections formed at the base end of the output shaft 20 with a different phase difference from the center of rotation of the output shaft 20 Respectively.
- the first sleeve 40 extends over the entire width of the chamber 1 and the wings 42 correspondingly extend over the entire width of the chamber 1,
- the powder contained in the chamber 1 is uniformly accumulated in the chamber 1 when the contents to be accumulated in the chamber 1 are in the form of powder, From the viewpoint of being able to accurately grasp the predetermined level of the image.
- the tip of the first sleeve 40 may be clogged by the cover plate 43 to prevent foreign matter from entering between the output shaft 20 and the sleeve 40.
- the relative rotation sensing unit 70 is connected to a central processing unit (CPU) (not shown).
- CPU central processing unit
- the central processing unit may stop the operation of the driving body 10 connected to the central processing unit and cause the alarm unit connected to the central processing unit to notify an alarm or perform a desired operation, To open a valve (not shown) provided at the bottom of the chamber 1 to discharge the contents accumulated in the chamber 1 to the outside of the chamber 1.
- the first sleeve 40 and the wing portion 42 are moved together with the output shaft 20 of the driving body 10, If the wing portion 42 is prevented from moving further by contact with the contents layer of the contents stacked up to the upper limit level in the chamber 1 while being compressed while being evenly contacted with the contents around the sleeve 40,
- the sleeve 40 receives a load in a direction opposite to the direction of movement of the output shaft 20 so that the first sleeve 40 moves relative to the output shaft 20 while overcoming the elastic force of the spring 50
- the relative motion is sensed by the relative movement detecting unit 70 so that the predetermined upper limit level of the contents accumulated in the chamber 1 can be grasped.
- the level switch 100 of the present invention can prevent the content It is possible to accurately measure the predetermined upper limit level of the contents.
- the output shaft 20 can be rotated in one direction,
- a wing portion (42) extending in a horizontal direction on a part of an outer circumferential surface of a tip end of the first sleeve (40) at any one of a first position and a second position is provided with a solid material accumulating in the chamber So that it is possible to accurately measure the level of the contents while flatly compressing the contents around the first sleeve 40 stacked in the chamber, It is preferable from the viewpoint that the contents accumulated in the first sleeve (1) are not wound on the first sleeve (40) in the case where solid matter such as hair is contained.
- the level switch 100 configured as described above may be configured as shown in FIGS. 3 to 5 as the level switch 200 of the second embodiment.
- the level switch 200 includes a driving body 110 such as a motor mounted on the bracket 102; An output shaft (20) of the driving body (110) inserted through the through hole (103) formed in the upper end of the chamber (101) and inserted into the chamber (101) and extending in the horizontal direction;
- the output shaft 120 is circumscribed at the front end of the output shaft 20 so as to be rotatable and unable to move in the longitudinal direction of the output shaft 120 so as to be rotatable through the through hole 103 and into the chamber 101
- a first sleeve (140) extending therethrough;
- a second sleeve (150) circumscribed at the base end of the output shaft (120) in a spline coupling manner so as to be movable in the longitudinal direction of the output shaft (120) while rotating together with the output shaft (120);
- a cam follower 141 formed at the base end of the first sleeve 140;
- the first sleeve 140 is rotatably passed through the through hole 103 of the chamber 101 but the first sleeve 140 is disposed in the chamber 101
- the second sleeve 150 may be penetrated through the through hole 103 of the chamber 101 so as to be rotatable and movable in the longitudinal direction of the output shaft 120.
- the first sleeve 140 extends over the entire width of the chamber 101 and the wings 142 correspondingly extend over the entire width of the chamber 101,
- the powder is uniformly accumulated in the chamber 101, so that the powder accumulated in the chamber 101 is uniformly mixed with the contents of the powder accumulated in the chamber 101, It is preferable from the viewpoint that the predetermined level can be accurately grasped.
- the cam follower 141 and the pair of cam followers 151 which are in sliding contact with each other are rotated in a direction in which the second sleeve 150 rotates relative to the first sleeve 140 and the second sleeve 150 when relative rotation occurs between the first sleeve 140 and the second sleeve 150
- the first sleeve 140 is pressed in a direction toward the back so that the back is moved in the forward direction, that is, a shape as shown on the top or bottom of FIG.
- the tip of the first sleeve 140 may be clogged by the cover plate 143 to prevent foreign matter from entering between the output shaft 120 and the first sleeve 141.
- the contact sensor 170 is connected to a central processing unit (CPU) (not shown).
- CPU central processing unit
- the central processing unit may stop the operation of the driving body 110 connected to the central processing unit and cause the alarm unit connected to the central processing unit to notify an alarm or perform a desired operation, And a valve (not shown) provided at the bottom of the chamber 101 is opened to discharge the contents accumulated in the chamber 101 to the outside of the chamber 1.
- the output shaft 120 of the drive body 110 is coupled with the first and second sleeves 151,
- the first and second sleeves 140 and 150 and the wing portion 143 move while contacting the contents around the first sleeve 140 piled up in the chamber 101,
- the first sleeve 140 receives a load in a direction opposite to the direction of movement of the output shaft 120 when the wing portion 143 is in contact with the first sleeve
- the first sleeve 140 and the second sleeve 160 move in a direction opposite to the direction of movement of the output shaft 120 and thus the cam follower 151 slidably contacts the cam follower 141 of the first sleeve 140 150 of the output shaft 120 overcomes the elastic force of the elastic body 160
- the first can be a base end of the second sleeve (150) to grasp the upper limit of the predetermined level of the said contact is brought into contact with the sensors 170
- the level switch 200 of the present invention can prevent the content It is possible to accurately measure the predetermined upper limit level of the contents.
- the output shaft 120 and the second sleeve 150 are spline coupled to each other in the second embodiment.
- the present invention is not limited to this, and the output shaft 120 may be formed with a key
- the key may be inserted into the key groove by forming a key groove on the inner surface of the second sleeve 150 or the portion of the output shaft 120 coupled with the second sleeve 150 may be formed into a polygonal cross- So that the inside of the second sleeve 150 may have a polygonal cross-sectional shape.
- the driving body 110 such as the motor may be rotated in one direction as in the first embodiment but may be repeatedly rotated in the forward and reverse directions between the first position and the second position on the horizontal line having a phase difference of 180 degrees
- a wing portion 142 extending in a horizontal direction on a part of the outer circumferential surface of the tip end of the first sleeve 140 at any one of the first position and the second position is provided with a powder 1 position and is compressed downward also in the second position so that it is possible to accurately measure the level of the contents while flatly compressing the contents around the first sleeve 140 piled in the chamber, It is preferable from the viewpoint that the contents accumulated in the chamber 101 are not wound on the first sleeve 140 when a solid body having long hair is included.
- the first sleeve 140 is rotated to reverse the second sleeve 150
- the cam follower body 141 is formed at the base end of the second sleeve 150 and the cam follower body 151 is formed at the tip of the second sleeve 150 so as to be in sliding contact with the cam follower body 141
- the level switch of the third embodiment may be such that the flange hoisting body 181 is circumscribed at the base end of the first sleeve 140 and the tip end of the second sleeve 150
- a token-shaped disk 183 is interposed between the flange running body 181 and the flange follower 185 and a gap is formed in the circumferential direction of the disk 183
- a plurality of grooves 182 having a size and shape capable of inserting a
- the level switch of the third embodiment has such a configuration, when the relative rotation of the first sleeve 140 with respect to the second sleeve 150 occurs, the plurality of balls 184 are moved to the flange follower The second sleeve 150 is pushed toward the base end while being disengaged from the plurality of grooves 186 of the first and second sleeves 185 and 185 so that the second sleeve 150 is brought into contact with the contact sensor 170 as shown in FIG. do.
- a drive cam 191 is provided on the base end side surface of the second sleeve 150 and the second sleeve 150 is attached to the bracket 102 as shown in FIG. It is possible to provide a driven cam 190 for slidingly contacting the driving cam 191 to forcibly return the second sleeve 150 to the distal end side, that is, to return to the home position.
- the present invention is not limited to this and the token-shaped disk 183 may be omitted And the plurality of balls 184 are inserted into a plurality of grooves 182 of the flange carrier body 181 and a plurality of grooves 186 of the flange follower body 185, A plurality of balls 184 may be inserted into a plurality of other grooves in a state where the ball 184 is exposed by inserting at least half of the plurality of balls 184 so as to prevent the balls 184 from escaping, And formation of the second layer.
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
Claims (11)
- 내용물을 축적하여 저장하는 챔버(1)에 마련된 브래킷(2)에 탑재된 레벨스위치에 있어서,상기 브래킷(2)에 탑재된 구동체(10);상기 챔버(1)의 상단에 형성된 관통구멍(3)을 관통하게 상기 챔버(1) 내로 삽입되어 수평방향으로 뻗어 있는 상기 구동체(10)의 출력축(20);상기 출력축(20)에 상대회전이 가능하게 상기 출력축(20)에 스프링(50)을 개재하여 외접되어 상기 관통구멍(3)을 회전 가능하게 관통하여 상기 챔버(1) 내로 뻗어 있는 제1슬리브(40);상기 챔버(1)에 쌓이는 제1슬리브(40)의 주변의 내용물과 접촉하면서 압축하도록 제1슬리브(40)의 외주면에 구비된 날개부(42); 및상기 제1슬리브(40)가 상기 출력축(20)에 대하여 상대회전이 발생한 것을 감지하는 상대회전감지부(70)를 포함하는 것을 특징으로 하는 레벨스위치.
- 제 1항에 있어서,상기 제1슬리브(40)의 선단은 덮개판(43)에 의해 막혀 있는 것을 특징으로 하는 레벨스위치.
- 제 1항에 있어서,상기 제1슬리브(40)가 상기 챔버(1)의 폭방향 전장에 걸쳐서 뻗어 있고, 상기 날개부(42)도 상기 챔버(1)의 폭방향 전장에 걸쳐서 뻗어 있는 것을 특징으로 하는 레벨스위치.
- 제 1항에 있어서,상기 구동체(10)는 상기 출력축(20)을 소정된 위상차를 두고 정역 또는 일방향으로 구동시키는 것을 특징으로 하는 레벨스위치.
- 제 4항에 있어서,상기 구동체(10)는 180도의 위상차를 갖는 수평선 상의 제1위치와 제2위치 사이에서 상기 출력축(20)을 정역방향으로 반복적으로 회전 구동하고,상기 제1위치와 제2위치 중 어느 하나의 위치에 있는 제1슬리브(40)의 외주면에 날개부(42)가 수평방향으로 뻗어서 구비된 것을 특징으로 하는 레벨스위치.
- 내용물을 축적하여 저장하는 챔버(101)에 마련된 브래킷(102)에 탑재된 레벨스위치에 있어서,상기 브래킷(102)에 탑재된 구동체(110);상기 챔버(101)의 상단에 형성된 관통구멍(103)을 관통하게 상기 챔버(101) 내로 삽입되어 수평방향으로 뻗어 있는 상기 구동체(110)의 출력축(120);상기 출력축(120)에 회전가능하게 그리고 상기 출력축(120)의 길이방향으로 이동하지 못하게 상기 출력축(120)의 선단에 외접되어 있는 제1슬리브(140);상기 출력축(120)과 함께 회전하면서 상기 출력축(120)의 길이방향으로 이동가능하게 상기 출력축(120)의 기단에 외접된 제2슬리브(150);상기 제1슬리브(140)의 기단에 형성된 캠주동체(141);상기 제2슬리브(150)의 선단에 상기 캠주동체(141)와 마주하여 서로 접촉되게 형성된 캠종동체(151);상기 챔버(101)에 쌓이는 제1슬리브(140)의 주변의 내용물과 접촉하면서 압축하도록 제1슬리브(140)의 외주면에 구비된 날개부(142);상기 제2슬리브(150)가 상기 출력축(120)의 길이방향으로 이동했을 때 원위치로 복귀시키는 복귀수단; 및상기 제2슬리브(150)의 후진시에 상기 제2슬리브(150)의 기단과 접촉하는 위치에 위치결정되어 상기 브래킷(102)에 장착된 접촉센서(170)를 포함하는 것을 특징으로 하는 레벨스위치.
- 제 6항에 있어서,상기 복귀수단은상기 제2슬리브(150)를 상기 제1슬리브(140) 쪽으로 탄성적으로 가압하는 탄성체(160) 및상기 제2슬리브가 후진되었을 때, 상기 제2슬리브의 기단측 면에 형성된 구동캠(191)이 상기 출력축(120)과 함께 회전하게 되면 상기 구동캠(191)과 접촉하여 상기 제2슬리브를 원위치로 복귀시키도록 상기 브래킷(102)에 마련된 피동캠(190) 중적어도 하나를 포함하는 것을 특징으로 하는 레벨스위치.
- 제 6항에 있어서,서로 접촉하고 있는 상기 캠주동체(141)와 상기 캠종동체(151)는 상기 제1슬리브(140)와 상기 제2슬리브(150) 간에 상대회전이 발생할 시에 상기 제2슬리브(150)가 상기 제1슬리브(140)에 등을 진 방향으로 가압을 받아 상기 등을 진 방향으로 이동하게 하는 형상을 가지는 것을 특징으로 하는 레벨스위치.
- 제 6항에 있어서,상기 제1슬리브(140)가 상기 챔버(101)의 폭방향 전장에 걸쳐서 뻗어 있고, 상기 날개부(142)도 상기 챔버(101)의 폭방향 전장에 걸쳐서 뻗어 있는 것을 특징으로 하는 레벨스위치.
- 제 1항에 있어서,상기 구동체(110)는 상기 출력축(120)을 소정된 위상차를 두고 정역 또는 일방향으로 구동시키는 것을 특징으로 하는 레벨스위치.
- 제 10항에 있어서,상기 구동체(10)는 180도의 위상차를 갖는 수평선 상의 제1위치와 제2위치 사이에서 상기 출력축(120)을 정역방향으로 반복적으로 회전 구동하고,상기 제1위치와 제2위치 중 어느 하나의 위치에 있는 제1슬리브(140)의 외주면에 날개부(142)가 수평방향으로 뻗어서 구비된 것을 특징으로 하는 레벨스위치.
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KR10-2017-0110042 | 2017-08-30 | ||
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JP2007147455A (ja) * | 2005-11-28 | 2007-06-14 | Hama International:Kk | レベルセンサ |
JP2008051758A (ja) * | 2006-08-28 | 2008-03-06 | Nohken:Kk | レベル検出装置 |
-
2018
- 2018-08-30 WO PCT/KR2018/010020 patent/WO2019045460A1/ko active Application Filing
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2001174311A (ja) * | 1999-12-17 | 2001-06-29 | Ishikawajima Harima Heavy Ind Co Ltd | 回転式レベル計 |
JP2003247880A (ja) * | 2002-02-25 | 2003-09-05 | Kansai Ootomeishiyon Kk | 回転式レベル検出装置 |
JP2006250669A (ja) * | 2005-03-10 | 2006-09-21 | Tokyo Keiso Co Ltd | レベル計測装置 |
JP2007147455A (ja) * | 2005-11-28 | 2007-06-14 | Hama International:Kk | レベルセンサ |
JP2008051758A (ja) * | 2006-08-28 | 2008-03-06 | Nohken:Kk | レベル検出装置 |
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