{"id":11740,"date":"2023-08-24T20:45:25","date_gmt":"2023-08-24T12:45:25","guid":{"rendered":"https:\/\/lorentzzi.com\/?p=11740"},"modified":"2025-08-30T23:00:45","modified_gmt":"2025-08-30T15:00:45","slug":"a-deepest-study-of-float-switch","status":"publish","type":"post","link":"https:\/\/lorentzzi.com\/pt\/a-deepest-study-of-float-switch\/","title":{"rendered":"Um estudo mais aprofundado do interruptor de boia"},"content":{"rendered":"
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A chave de boia \u00e9 um componente estruturalmente simples usado para controle de n\u00edvel de l\u00edquido. Ela n\u00e3o possui circuitos complexos e n\u00e3o \u00e9 suscet\u00edvel a interfer\u00eancias.\u00a0<\/p>

Desde que o material correto seja escolhido, ele pode ser usado com qualquer tipo de l\u00edquido, press\u00e3o ou temperatura, o que o torna amplamente aplic\u00e1vel em equipamentos de tratamento de \u00e1gua e em outros campos.\u00a0<\/p>

Mas como o sensor de n\u00edvel de l\u00edquido controla o n\u00edvel de \u00e1gua? Qual \u00e9 o seu princ\u00edpio de controle? E como ele controla a bomba de \u00e1gua para abastecimento e drenagem?<\/p>

\u00a0Vou explicar em detalhes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Princ\u00edpio de funcionamento da chave de boia<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Primeiro, vamos falar sobre o princ\u00edpio de funcionamento da chave flutuante.\u00a0<\/p>

A chave de n\u00edvel do tanque funciona por meio de magnetismo.\u00a0<\/p>

\u00c0 medida que a boia dentro da boia sobe ou desce com o n\u00edvel do l\u00edquido, ela faz com que o chip do reed switch na posi\u00e7\u00e3o definida no tubo de detec\u00e7\u00e3o seja acionado, gerando uma chave de contato ou um sinal de convers\u00e3o.\u00a0<\/p>

Dentro de um tubo n\u00e3o magn\u00e9tico vedado, s\u00e3o instalados um ou mais reed switches. Esse tubo passa por uma ou mais esferas de flutua\u00e7\u00e3o ocas com um \u00edm\u00e3 em forma de anel em seu interior.\u00a0<\/p>

A subida ou descida do l\u00edquido far\u00e1 com que a esfera da boia se mova para cima e para baixo, fazendo com que o reed switch no tubo n\u00e3o magn\u00e9tico seja atra\u00eddo ou desconectado, resultando em um sinal de sa\u00edda do switch.\u00a0<\/p>

Isso pode ser um pouco dif\u00edcil de entender, ent\u00e3o vou explicar de uma forma mais simples. Essa chave de l\u00edquido consiste em um flutuador e um peso.\u00a0<\/p>

O peso serve para fixar a posi\u00e7\u00e3o, permitindo que a boia flutue em uma \u00e1rea espec\u00edfica. Dentro da boia, h\u00e1 uma esfera de a\u00e7o. Quando a boia sobe ou desce, a esfera de a\u00e7o rola e empurra a alavanca, que, por sua vez, ativa o microinterruptor.\u00a0<\/p>

O microinterruptor tem tr\u00eas fios, a saber, o terminal comum, o normalmente aberto e o normalmente fechado.\u00a0<\/p>

Esses terminais normalmente abertos e normalmente fechados s\u00e3o os sinais de chave mencionados anteriormente.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Como identificar cada cabo de uma chave de boia?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Como mencionado anteriormente, a chave de boia tem tr\u00eas fios: o terminal comum, normalmente aberto e normalmente fechado.\u00a0<\/p>

Antes de fazer a fia\u00e7\u00e3o, precisamos determinar a fun\u00e7\u00e3o desses tr\u00eas fios.\u00a0<\/p>

Para o abastecimento de \u00e1gua, \u00e9 uma partida baixa e uma parada alta, enquanto para a drenagem, \u00e9 uma partida alta e uma parada baixa. Conhecendo esse princ\u00edpio, podemos usar um mult\u00edmetro para medir.\u00a0<\/p>

Para o abastecimento de \u00e1gua, com o\u00a0Sensor de n\u00edvel de l\u00edquido\u00a0<\/span>em um n\u00edvel baixo de l\u00edquido, podemos ajustar o mult\u00edmetro para o modo de campainha e testar a continuidade de quaisquer dois fios.\u00a0<\/span><\/p>

Se descobrirmos que os fios preto e azul est\u00e3o conectados, com base no princ\u00edpio de partida baixa e parada alta, conectamos o fornecimento de \u00e1gua aos fios preto e azul e n\u00e3o conectamos o fio marrom.\u00a0<\/span><\/p>

Para drenagem, com a chave flutuante em um n\u00edvel alto de l\u00edquido, podemos testar a continuidade novamente.\u00a0<\/span><\/p>

Se descobrirmos que os fios marrom e preto est\u00e3o conectados, com base no princ\u00edpio de partida alta e parada baixa, conectamos a drenagem aos fios preto e marrom e n\u00e3o conectamos o fio azul.<\/span><\/p>

Depois de medir a fun\u00e7\u00e3o dos tr\u00eas fios do sensor de n\u00edvel de boia e determinar como fazer a fia\u00e7\u00e3o para alimenta\u00e7\u00e3o e drenagem, prepare um interruptor de circuito de falha de aterramento (GFCI), um Contator CA<\/span><\/a>um sensor de n\u00edvel de boia e um motor de bomba de \u00e1gua.\u00a0<\/p>

Agora podemos prosseguir com a fia\u00e7\u00e3o propriamente dita.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Identifica\u00e7\u00e3o\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Aplica\u00e7\u00f5es de interruptor de boia<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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A chave flutuante \u00e9 usada principalmente para o controle do n\u00edvel de l\u00edquidos, como o controle da bomba de \u00e1gua para abastecimento e drenagem.\u00a0<\/span><\/p>

Quando se trata do uso e da fia\u00e7\u00e3o da chave de boia, \u00e9 importante observar que esse produto serve apenas como um sinal e n\u00e3o pode controlar diretamente a bomba de \u00e1gua.\u00a0<\/span><\/p>

Um acess\u00f3rio para coleta de sinal, como um rel\u00e9 intermedi\u00e1rio ou um contator CA, deve ser adicionado no meio.\u00a0<\/span><\/p>

Vamos dar uma olhada na fia\u00e7\u00e3o para controlar a bomba de \u00e1gua para abastecimento e drenagem usando uma chave de boia.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Fia\u00e7\u00e3o de uma chave de boia para abastecimento de \u00e1gua e drenagem<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Para abastecimento de \u00e1gua: Conecte os fios neutro e energizado do GFCI aos terminais de entrada dos contatos principais do contator.\u00a0<\/p>

Conecte os terminais de sa\u00edda dos contatos principais do contator ao motor da bomba de \u00e1gua.\u00a0<\/p>

Conecte a bobina A1 ao fio energizado e a bobina A2 ao fio azul do sensor do tipo boia.\u00a0<\/p>

Conecte o fio preto de volta ao fio neutro e n\u00e3o conecte o fio marrom.<\/p>

Para drenagem: Conecte os fios neutro e energizado do GFCI aos terminais de entrada dos contatos principais do contator.\u00a0<\/span><\/p>

Conecte os terminais de sa\u00edda dos contatos principais do contator ao motor da bomba de \u00e1gua.\u00a0<\/span><\/p>

Conecte a bobina A1 ao fio energizado e a bobina A2 ao fio marrom da chave flutuante.<\/span><\/p>

\u00a0Conecte o fio preto de volta ao fio neutro e n\u00e3o conecte o fio azul.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Conclus\u00e3o<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Portanto, abordamos o princ\u00edpio de funcionamento da chave de boia, como ela controla o n\u00edvel de \u00e1gua e, por fim, a medi\u00e7\u00e3o e a fia\u00e7\u00e3o para controlar a bomba de \u00e1gua para abastecimento e drenagem usando essa chave.\u00a0<\/p>

Voc\u00ea aprendeu alguma coisa?<\/p>

Se tiver mais alguma d\u00favida, envie um e-mail para shonxu@lorentzzi.com<\/a><\/span>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

The float switch is a structurally simple component used for liquid level control. It does not have complex circuits and is not susceptible to interference.\u00a0 As long as the correct material is chosen, it can be used with any type of liquid, pressure, or temperature, making it widely applicable in water treatment equipment and other […]<\/p>\n","protected":false},"author":1,"featured_media":11747,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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