JP2021045028A - Changeover circuit - Google Patents

Changeover circuit Download PDF

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JP2021045028A
JP2021045028A JP2019167691A JP2019167691A JP2021045028A JP 2021045028 A JP2021045028 A JP 2021045028A JP 2019167691 A JP2019167691 A JP 2019167691A JP 2019167691 A JP2019167691 A JP 2019167691A JP 2021045028 A JP2021045028 A JP 2021045028A
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circuit
pump
coil
switch
contact
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小松　昭夫
Akio Komatsu
昭夫 小松
和昭 稲若
Kazuaki Inawaka
和昭 稲若
阿部　哲也
Tetsuya Abe
哲也 阿部
祐樹 金元
Yuki Kanemoto
祐樹 金元
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Komatsu Denki Sangyo KK
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Komatsu Denki Sangyo KK
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Abstract

To provide such a circuit that is capable of solving production efficiency reduction caused by conventionally implementing different kinds of wiring work in accordance with a single alternate operation system in which only one of two pumps is operable and a parallel operation system in which the two pumps are simultaneously operable.SOLUTION: A changeover circuit 1 comprises: a first control circuit 61 which controls opening/closing of a first main contact 33 provided in a first main circuit 11 supplying power to a first motor 4; and a second control circuit 62 which controls opening/closing of a second main contact 43 provided in a second main circuit 12 supplying power to a second motor 5. The changeover circuit also comprises a changeover switch 56 capable of changing over the first control circuit 61 and the second control circuit 62 to a first interlock circuit 63 and a second interlock circuit 64 corresponding to a single alternate operation system, and to a first detour circuit 65 and a second detour circuit 66 corresponding to a parallel operation system.SELECTED DRAWING: Figure 3

Description

本発明は、２台の電動機を同時に運転できる回路と、２台の電動機のうち１台しか運転できない回路との２つの回路を切り替える切替回路に関する。 The present invention relates to a switching circuit that switches between two circuits, a circuit capable of operating two electric motors at the same time and a circuit capable of operating only one of the two electric motors.

一般的に、家庭等から排出される汚水は、地中に埋設されている下水管を通って下水処理施設まで運ばれる。下水管には勾配が設けられており、汚水は下水管の勾配による自然流下によって下流側へ流れるようになっている。しかし、下水処理施設までの経路の途中で、地形等の理由によって下水管に勾配が設けられず、汚水を自然に流せないような箇所に、マンホールポンプ施設と呼ばれる中継ポンプ施設が設けられることがある。マンホールポンプ施設は、地中に埋め込まれた水槽（マンホール）内に上流側から流入してきた汚水を貯留し、貯留された汚水をマンホール内に備えられたポンプによって、下流側の汚水が自然流下する下水管や別のマンホールポンプ施設等へ圧送する施設である。 Generally, sewage discharged from households and the like is transported to a sewage treatment facility through a sewage pipe buried in the ground. The sewage pipe is provided with a gradient, and the sewage flows to the downstream side due to the natural flow due to the gradient of the sewage pipe. However, in the middle of the route to the sewage treatment facility, a relay pump facility called a manhole pump facility may be installed in a place where the sewage pipe is not sloped due to topography and the sewage cannot flow naturally. is there. The manhole pump facility stores sewage that has flowed in from the upstream side into a water tank (manhole) embedded in the ground, and the stored sewage is naturally flowed down by a pump installed in the manhole. It is a facility that pumps water to a sewer pipe or another manhole pump facility.

マンホールポンプ施設には、通常、近くにポンプを制御するための制御盤が備えられており、制御盤内に備えられたコントローラによって、例えば、マンホール内の水位が予め設定された水位まで上がると汚水が排出されるようにポンプが運転され、水位が予め設定された水位まで下がるとポンプが停止されるというように、マンホール内の水位等に基づいて、自動でポンプの運転が制御される（例えば、特許文献１参照）。 A manhole pump facility is usually equipped with a control panel to control the pump nearby, and a controller installed in the control panel, for example, causes sewage when the water level in the manhole rises to a preset water level. The operation of the pump is automatically controlled based on the water level in the manhole, etc., such that the pump is operated so that the water level is discharged and the pump is stopped when the water level drops to a preset water level (for example). , Patent Document 1).

１つのマンホールポンプ施設には、通常、２台のポンプが設けられており、それら２台のポンプは、単独交互運転方式と並列運転方式との２つの運転方式のどちらかにより運転される。単独交互運転方式では、ポンプの最大運転台数は１台で、２台のポンプが同時に運転されることはなく、１台ずつ交互に運転される。１台で汚水の計画流入量を排水できるポンプが交互に運転されるので、２台のポンプの運転時間が平均化され、１台だけで運用するよりもポンプの寿命を延ばせる。また、どちらかのポンプが故障した場合でも、もう１台のポンプを運転することで汚水の排水を止めることなく行うことができる。 One manhole pump facility is usually provided with two pumps, and these two pumps are operated by either a single alternating operation system or a parallel operation system. In the single alternating operation method, the maximum number of pumps to be operated is one, and the two pumps are not operated at the same time, but are operated alternately one by one. Since the pumps that can drain the planned inflow of sewage with one unit are operated alternately, the operating time of the two pumps is averaged and the life of the pumps can be extended as compared with the operation with only one unit. Further, even if one of the pumps fails, the drainage of sewage can be performed without stopping by operating the other pump.

それに対して、並列運転方式では、ポンプの最大運転台数は２台で、２台のポンプを同時に運転できるようになっている。マンホール内の水位が低い場合には、１台のポンプのみを運転させて、水位が高くなってくると、２台同時に運転して排水量を上げるというような制御ができる。汚水の計画流入量が多い場合等に並列運転方式が採用されることが多い。これら２つの運転方式のどちらを採用するかは、汚水の計画流入量や電力会社との契約電力等を考慮しながら、マンホールポンプ施設の設計時に決定される。 On the other hand, in the parallel operation method, the maximum number of pumps that can be operated is two, and two pumps can be operated at the same time. When the water level in the manhole is low, only one pump can be operated, and when the water level rises, two pumps can be operated at the same time to increase the amount of drainage. The parallel operation method is often adopted when the planned inflow of sewage is large. Which of these two operation methods is adopted is decided at the time of designing the manhole pump facility, taking into consideration the planned inflow of sewage and the contracted power with the electric power company.

単独交互運転方式と並列運転方式とのどちらにおいても、平常時は、制御盤内のコントローラによってそれぞれの運転方式に沿うように自動でポンプの運転が制御される。また、コントローラには、メンテナンス等の際に管理者等が手動でポンプを制御するための手動制御手段が備えられているが、手動制御手段による制御もコントローラの制御の下で行われるようになっている。そのため、コントローラが故障すると、ポンプの運転が行えず、マンホール内の汚水がオーバーフローする虞がある。そのような場合に備えて、制御盤内には、コントローラの制御に依らずにポンプを強制的に運転させる強制運転スイッチが設けられている。強制運転スイッチは、２台のポンプに対してそれぞれ設けられており、管理者等が手動で操作するスイッチとなっている。強制運転スイッチをオンにすることで、オンにした強制運転スイッチに対応したポンプがコントローラの制御に依らずに強制的に運転される。 In both the single alternating operation method and the parallel operation method, the operation of the pump is automatically controlled by the controller in the control panel in normal times according to each operation method. In addition, the controller is equipped with a manual control means for the administrator or the like to manually control the pump at the time of maintenance or the like, but the control by the manual control means is also performed under the control of the controller. ing. Therefore, if the controller fails, the pump cannot be operated and the sewage in the manhole may overflow. In preparation for such a case, a forced operation switch for forcibly operating the pump without being controlled by the controller is provided in the control panel. The forced operation switch is provided for each of the two pumps, and is a switch manually operated by an administrator or the like. By turning on the forced operation switch, the pump corresponding to the turned on forced operation switch is forcibly operated without being controlled by the controller.

特開２００５−０３４８１０号公報Japanese Unexamined Patent Publication No. 2005-034810

しかしながら、上記のように、マンホールポンプ施設に備えられた２台のポンプの運転方式には、単独交互運転方式と並列運転方式との２つがあって、どちらか一方の運転方式が採用されている。単独交互運転方式では、ポンプを１台ずつ運転することが想定されているので、例えば電源やポンプ等もそれに合わせて選定されていることが多く、２台のポンプに対してそれぞれ設けられている強制運転スイッチを２つともオンにした時に、２台のポンプが同時に運転されると、ポンプや制御盤等が故障してしまうような虞がある。そのため、単独交互運転方式では、強制運転スイッチを２つともオンにした場合でも、どちらか一方のポンプしか運転されないようなインターロックを有する回路の配線を行っている。それに対して、並列運転方式では、２台のポンプが同時に運転されても問題ない仕様となっているため、２つの強制運転スイッチを同時にオンにした場合は、２台のポンプが同時に運転されるようなインターロックの無い回路の配線を行っている。 However, as described above, there are two operation methods for the two pumps installed in the manhole pump facility, a single alternating operation method and a parallel operation method, and one of the operation methods is adopted. .. In the single alternating operation method, it is assumed that the pumps are operated one by one, so for example, the power supply and the pumps are often selected accordingly, and are provided for each of the two pumps. If two pumps are operated at the same time when both of the forced operation switches are turned on, there is a risk that the pumps, control panel, etc. may break down. Therefore, in the single alternating operation method, a circuit having an interlock is wired so that only one of the pumps is operated even when both of the forced operation switches are turned on. On the other hand, in the parallel operation method, there is no problem even if two pumps are operated at the same time, so when two forced operation switches are turned on at the same time, the two pumps are operated at the same time. We are wiring a circuit without such an interlock.

このように、従来では、２台のポンプのうち１台しか運転できない単独交互運転方式と、２台のポンプを同時に運転できる並列運転方式とで、異なる配線作業を行う必要があったため、運転方式の違いによって、配線の確認作業や制御盤の管理作業等の手間がかかり、製作効率の低下の原因となっていた。 In this way, in the past, it was necessary to perform different wiring work between the independent alternating operation method in which only one of the two pumps could be operated and the parallel operation method in which the two pumps could be operated at the same time. Due to the difference, it takes time and effort to check the wiring and manage the control panel, which causes a decrease in manufacturing efficiency.

本発明は上記事情に鑑みてなされたものであって、２台のポンプのうち１台しか運転できない単独交互運転方式と、２台のポンプを同時に運転できる並列運転方式とで、従来異なる配線作業を行っていたことによる製作効率の低下を改善できるような回路を提供することを目的とする。 The present invention has been made in view of the above circumstances, and is conventionally different in wiring work between a single alternating operation method in which only one of two pumps can be operated and a parallel operation method in which two pumps can be operated at the same time. The purpose is to provide a circuit that can improve the decrease in manufacturing efficiency due to the above.

上記課題を解決するために、本発明に係る切替回路は、第１コイルと、前記第１コイルの通電状態に応じて連動して動作する第１主接点及び第１補助接点とを有する第１電磁接触器と、第２コイルと、前記第２コイルの通電状態に応じて連動して動作する第２主接点及び第２補助接点とを有する第２電磁接触器と、回路の開閉を行う第１強制運転スイッチと、回路の開閉を行う第２強制運転スイッチと、２つの回路を切り替える第１切替スイッチと、２つの回路を切り替える第２切替スイッチと、を備え、前記第１切替スイッチと前記第２補助接点と前記第１強制運転スイッチと前記第１コイルとを有し、第１電動機に電力を供給する第１主回路に設けられた前記第１主接点の開閉を制御する第１制御回路と、前記第２切替スイッチと前記第１補助接点と前記第２強制運転スイッチと前記第２コイルとを有し、第２電動機に電力を供給する第２主回路に設けられた前記第２主接点の開閉を制御する第２制御回路と、が設けられ、前記第１制御回路は、前記第１切替スイッチによって、前記第２補助接点と前記第１強制運転スイッチと前記第１コイルとが直列に接続された第１インターロック回路と、前記第２補助接点を迂回して前記第１強制運転スイッチと前記第１コイルとが直列に接続された第１迂回回路とを切り替え可能となっており、前記第２制御回路は、前記第２切替スイッチによって、前記第１補助接点と前記第２強制運転スイッチと前記第２コイルとが直列に接続された第２インターロック回路と、前記第１補助接点を迂回して前記第２強制運転スイッチと前記第２コイルとが直列に接続された第２迂回回路とを切り替え可能となっており、前記第１主接点は、常開接点で前記第１コイルの通電時のみ閉となり、前記第１補助接点は、常閉接点で前記第１コイルの通電時のみ開となり、前記第２主接点は、常開接点で前記第２コイルの通電時のみ閉となり、前記第２補助接点は、常閉接点で前記第２コイルの通電時のみ開となり、前記第１切替スイッチ及び前記第２切替スイッチは、連動して動作し、前記第１制御回路が前記第１インターロック回路かつ前記第２制御回路が前記第２インターロック回路に切り替えられた状態と、前記第１制御回路が前記第１迂回回路かつ前記第２制御回路が前記第２迂回回路に切り替えられた状態とを切り替えることを特徴とする。 In order to solve the above problems, the switching circuit according to the present invention has a first coil and a first main contact and a first auxiliary contact that operate in conjunction with each other according to the energized state of the first coil. A second electromagnetic contactor having an electromagnetic contactor, a second coil, and a second main contact and a second auxiliary contact that operate in conjunction with each other according to the energized state of the second coil, and a second that opens and closes a circuit. A forced operation switch, a second forced operation switch for opening and closing a circuit, a first changeover switch for switching between two circuits, and a second changeover switch for switching between two circuits are provided, and the first changeover switch and the said changeover switch are provided. A first control having a second auxiliary contact, the first forced operation switch, and the first coil, and controlling the opening and closing of the first main contact provided in the first main circuit for supplying power to the first electric motor. The second main circuit having a circuit, the second changeover switch, the first auxiliary contact, the second forced operation switch, and the second coil, and supplying power to the second electric motor. A second control circuit for controlling the opening and closing of the main contact is provided, and in the first control circuit, the second auxiliary contact, the first forced operation switch, and the first coil are connected by the first changeover switch. It is possible to switch between the first interlock circuit connected in series and the first bypass circuit in which the first forced operation switch and the first coil are connected in series by bypassing the second auxiliary contact. The second control circuit includes a second interlock circuit in which the first auxiliary contact, the second forced operation switch, and the second coil are connected in series by the second changeover switch, and the first. It is possible to switch between the second forced operation switch and the second bypass circuit in which the second coil is connected in series by bypassing the auxiliary contact, and the first main contact is a normally open contact and is the first. It is closed only when one coil is energized, the first auxiliary contact is a normally closed contact and is open only when the first coil is energized, and the second main contact is a normally open contact only when the second coil is energized. The second auxiliary contact is closed, and the second auxiliary contact is a normally closed contact and is opened only when the second coil is energized. The first changeover switch and the second changeover switch operate in conjunction with each other, and the first control circuit operates. A state in which the first interlock circuit and the second control circuit are switched to the second interlock circuit, and the first control circuit is the first detour circuit and the second control circuit is the second detour circuit. It is characterized by switching between the switched state.

好ましくは、本発明に係る切替回路は、前記第１切替スイッチ及び前記第２切替スイッチが、前記第１電動機及び前記第２電動機の運転を制御するコントローラの内部に隠されて設けられていることを特徴とする。 Preferably, the changeover circuit according to the present invention is provided with the first changeover switch and the second changeover switch hidden inside a controller that controls the operation of the first electric motor and the second electric motor. It is characterized by.

好ましくは、本発明に係る切替回路は、前記第１強制運転スイッチ及び前記第２強制運転スイッチが、前記コントローラに設けられていることを特徴とする。 Preferably, the changeover circuit according to the present invention is characterized in that the first forced operation switch and the second forced operation switch are provided in the controller.

本発明に係る切替回路によると、第１電動機に電力を供給する第１主回路に第１電磁接触器の第１主接点が設けられ、第２電動機に電力を供給する第２主回路に第２電磁接触器の第２主接点が設けられているので、第１主接点の開閉によって第１電動機への電力の供給が制御され、第２主接点の開閉によって第２電動機への電力の供給が制御される。第１主接点の開閉は、第１電磁接触器の第１コイルの通電によって制御され、第２主接点の開閉は、第２電磁接触器の第２コイルの通電によって制御される。 According to the switching circuit according to the present invention, the first main circuit that supplies electric power to the first electric motor is provided with the first main contact of the first electromagnetic contactor, and the second main circuit that supplies electric power to the second electric motor is second. 2 Since the second main contact of the electromagnetic contactor is provided, the power supply to the first motor is controlled by opening and closing the first main contact, and the power supply to the second motor is controlled by opening and closing the second main contact. Is controlled. The opening and closing of the first main contact is controlled by energization of the first coil of the first magnetic contactor, and the opening and closing of the second main contact is controlled by energization of the second coil of the second electromagnetic contactor.

第１制御回路は、第１主回路に設けられた第１主接点の開閉を制御することによって、第１電動機の運転を制御する回路となっており、第２制御回路は、第２主回路に設けられた第２主接点の開閉を制御することによって、第２電動機の運転を制御する回路となっている。第１制御回路は、第１切替スイッチと第２電磁接触器の第２補助接点と第１強制運転スイッチと第１コイルとを有し、第１切替スイッチによって、第２補助接点と第１強制運転スイッチと第１コイルとが直列に接続された第１インターロック回路と、第２補助接点を迂回して第１強制運転スイッチと第１コイルとが直列に接続された第１迂回回路とを切り替え可能となっており、第２制御回路は、第２切替スイッチと第１電磁接触器の第１補助接点と第２強制運転スイッチと第２コイルとを有し、第２切替スイッチによって、第１補助接点と第２強制運転スイッチと第２コイルとが直列に接続された第２インターロック回路と、第１補助接点を迂回して第２強制運転スイッチと第２コイルとが直列に接続された第２迂回回路とを切り替え可能となっている。 The first control circuit is a circuit that controls the operation of the first electric motor by controlling the opening and closing of the first main contact provided in the first main circuit, and the second control circuit is the second main circuit. It is a circuit that controls the operation of the second electric motor by controlling the opening and closing of the second main contact provided in. The first control circuit has a first changeover switch, a second auxiliary contact of the second electromagnetic contactor, a first forced operation switch, and a first coil, and the first changeover switch causes the second auxiliary contact and the first forcible. A first interlock circuit in which the operation switch and the first coil are connected in series, and a first detour circuit in which the first forced operation switch and the first coil are connected in series by bypassing the second auxiliary contact. The second control circuit has a second changeover switch, a first auxiliary contact of the first electromagnetic contactor, a second forced operation switch, and a second coil, and is switched by the second changeover switch. The second interlock circuit in which the 1 auxiliary contact, the 2nd forced operation switch and the 2nd coil are connected in series, and the 2nd forced operation switch and the 2nd coil are connected in series by bypassing the 1st auxiliary contact. It is possible to switch between the second detour circuit and the second detour circuit.

第１強制運転スイッチ及び第２強制運転スイッチは、回路の開閉を行うスイッチで、第１強制運転スイッチ及び第２強制運転スイッチを操作することでそれぞれが設けられた回路の開閉を行うことができる。第１主接点及び第１補助接点は、第１コイルの通電状態に応じて連動して動作し、第１主接点は、常開接点で第１コイルの通電時のみ閉となり、第１補助接点は、常閉接点で第１コイルの通電時のみ開となる。第２主接点及び第２補助接点は、第２コイルの通電状態に応じて連動して動作し、第２主接点は、常開接点で第２コイルの通電時のみ閉となり、第２補助接点は、常閉接点で第２コイルの通電時のみ開となる。第１切替スイッチ及び第２切替スイッチは、連動して動作し、第１制御回路が第１インターロック回路かつ第２制御回路が第２インターロック回路に切り替えられた状態と、第１制御回路が第１迂回回路かつ第２制御回路が第２迂回回路に切り替えられた状態との２通りの回路の切り替えを行うようになっている。 The first forced operation switch and the second forced operation switch are switches for opening and closing circuits, and by operating the first forced operation switch and the second forced operation switch, the circuits provided with each can be opened and closed. .. The first main contact and the first auxiliary contact operate in conjunction with each other according to the energized state of the first coil, and the first main contact is a normally open contact that is closed only when the first coil is energized, and the first auxiliary contact. Is a normally closed contact and is open only when the first coil is energized. The second main contact and the second auxiliary contact operate in conjunction with each other according to the energized state of the second coil, and the second main contact is a normally open contact that is closed only when the second coil is energized, and the second auxiliary contact. Is a normally closed contact and is open only when the second coil is energized. The first changeover switch and the second changeover switch operate in conjunction with each other, and the first control circuit is switched to the first interlock circuit and the second control circuit is switched to the second interlock circuit, and the first control circuit is The first detour circuit and the second control circuit are switched to the second detour circuit in two ways.

第１制御回路及び第２制御回路が、第１インターロック回路かつ第２インターロック回路に切り替えられている状態の時は、第１強制運転スイッチを操作して閉とすると、第２補助接点は常閉接点で閉となっているので第１制御回路が繋がって第１コイルに電流が流れ、それによって第１主回路の第１主接点が閉となって、第１主回路が繋がって第１電動機が運転される。それと同時に、第２制御回路に設けられている第１補助接点が開となるため、この状態で第２強制運転スイッチを操作して閉としても、第１補助接点によって第２制御回路が切断された状態となり、第２制御回路の第２コイルに電流は流れずに、第２主接点は開のまま第２主回路は切断された状態で、第２電動機は運転されない。第１強制運転スイッチを操作して開とすると、第１制御回路が切断されて第１コイルの通電が無くなり、第１主接点が開となって第１主回路が切断されて第１電動機の運転が停止されると共に、第１補助接点が閉となるので、第２強制運転スイッチが閉となっていれば、第２制御回路が繋がって第２コイルに電流が流れて、第２主接点が閉となって第２主回路が繋がって第２電動機が運転される。この時、第１強制運転スイッチを閉としても、第２補助接点が開となっており第１制御回路は切断されているため、第１電動機は運転されない。このように、第１制御回路及び第２制御回路が、第１インターロック回路かつ第２インターロック回路に切り替えられている状態の時は、第１強制運転スイッチ及び第２強制運転スイッチを２つとも閉としたとしても、第１電動機と第２電動機とが同時に運転されることはなく、どちらか一方しか運転されないようになっている。 When the first control circuit and the second control circuit are switched to the first interlock circuit and the second interlock circuit, when the first forced operation switch is operated to close the second auxiliary contact, the second auxiliary contact is opened. Since it is closed at the normally closed contact, the first control circuit is connected and a current flows through the first coil, which closes the first main contact of the first main circuit and connects the first main circuit. 1 The electric motor is operated. At the same time, since the first auxiliary contact provided in the second control circuit is opened, the second control circuit is disconnected by the first auxiliary contact even if the second forced operation switch is operated and closed in this state. In this state, no current flows through the second coil of the second control circuit, the second main contact remains open, the second main circuit is disconnected, and the second motor is not operated. When the first forced operation switch is operated to open it, the first control circuit is cut off and the first coil is no longer energized, the first main contact is opened and the first main circuit is cut off, and the first electric motor is opened. Since the operation is stopped and the first auxiliary contact is closed, if the second forced operation switch is closed, the second control circuit is connected and a current flows through the second coil to make the second main contact. Is closed, the second main circuit is connected, and the second electric motor is operated. At this time, even if the first forced operation switch is closed, the first electric motor is not operated because the second auxiliary contact is open and the first control circuit is disconnected. In this way, when the first control circuit and the second control circuit are switched to the first interlock circuit and the second interlock circuit, two first forced operation switches and two second forced operation switches are used. Even if both are closed, the first electric motor and the second electric motor are not operated at the same time, and only one of them is operated.

それに対して、第１制御回路及び第２制御回路が、第１迂回回路かつ第２迂回回路に切り替えられている状態の時は、第１強制運転スイッチを閉とすると、第１制御回路が繋がって第１コイルに電流が流れ、第１主接点が閉となって第１主回路が繋がって第１電動機が運転される。この時、第１補助接点が開となるが、第２制御回路は第２迂回回路で第１補助接点を迂回して経由しない回路となっており、第２強制運転スイッチを閉にすると、第２制御回路が繋がって第２コイルに電流が流れ、第２主接点が閉となって第２主回路が繋がって第２電動機が運転される。この時、第２補助接点が開となるが、第１制御回路は第１迂回回路で第２補助接点を迂回して経由しない回路となっているので、第１制御回路が切断されて第１電動機の運転が停止されることはない。このように、第１制御回路及び第２制御回路が、第１迂回回路かつ第２迂回回路に切り替えられている状態の時は、第１強制運転スイッチ及び第２強制運転スイッチを２つとも閉とすると、第１電動機と第２電動機とが２つとも運転されるようになっている。 On the other hand, when the first control circuit and the second control circuit are switched to the first detour circuit and the second detour circuit, when the first forced operation switch is closed, the first control circuit is connected. A current flows through the first coil, the first main contact is closed, the first main circuit is connected, and the first electric motor is operated. At this time, the first auxiliary contact is opened, but the second control circuit is a circuit that bypasses the first auxiliary contact and does not pass through the second bypass circuit, and when the second forced operation switch is closed, the second is The two control circuits are connected, a current flows through the second coil, the second main contact is closed, the second main circuit is connected, and the second electric motor is operated. At this time, the second auxiliary contact is opened, but since the first control circuit is a circuit that bypasses the second auxiliary contact and does not pass through the first bypass circuit, the first control circuit is disconnected and the first The operation of the electric motor is not stopped. In this way, when the first control circuit and the second control circuit are switched to the first detour circuit and the second detour circuit, both the first forced operation switch and the second forced operation switch are closed. Then, both the first electric motor and the second electric motor are operated.

従って、本発明に係る切替回路は、第１切替スイッチ及び第２切替スイッチの切り替え操作を行うだけで、第１電動機及び第２電動機を２台同時に運転できる運転方式と、第１電動機及び第２電動機のうち同時に運転できるのは１台だけで２台同時には運転できない運転方式とのどちらの運転方式にも適用することができる。また、本発明に係る切替回路は、２つの運転方式に対応する２つの回路が切り替え可能に統合されているので、運転方式によって別々の回路の配線を行う必要がなく、共通の配線作業となるので、運転方式の違いによる配線の確認や制御盤の管理の手間を削減し、製作効率を向上させることができる。 Therefore, the changeover circuit according to the present invention has an operation method in which two first electric motors and second electric motors can be operated at the same time by simply performing a changeover operation of the first changeover switch and the second changeover switch, and the first electric motor and the second electric motor. It can be applied to both operation methods, that is, only one electric motor can be operated at the same time and two electric motors cannot be operated at the same time. Further, in the switching circuit according to the present invention, since the two circuits corresponding to the two operation methods are integrated so as to be switchable, it is not necessary to wire different circuits depending on the operation method, and the wiring work is common. Therefore, it is possible to reduce the trouble of checking the wiring and managing the control panel due to the difference in the operation method, and improve the manufacturing efficiency.

好ましくは、本発明に係る切替回路は、前記第１切替スイッチ及び前記第２切替スイッチが、前記第１電動機及び前記第２電動機の運転を制御するコントローラの内部に隠されて設けられていることを特徴とするので、第１電動機及び第２電動機の定期的なメンテナンス等を行う管理者等によって、第１切替スイッチ及び第２切替スイッチを操作されてしまうような虞を低減できる。 Preferably, the changeover circuit according to the present invention is provided so that the first changeover switch and the second changeover switch are hidden inside a controller that controls the operation of the first electric motor and the second electric motor. Therefore, it is possible to reduce the risk that the first changeover switch and the second changeover switch will be operated by an administrator or the like who performs periodic maintenance of the first electric motor and the second electric motor.

好ましくは、本発明に係る切替回路は、前記第１強制運転スイッチ及び前記第２強制運転スイッチが、前記コントローラに設けられていることを特徴とするので、コントローラには、通常、第１電動機及び第２電動機を手動で制御するための手動制御手段が設けられており、そのため、コントローラは制御盤内で管理者等が操作しやすい位置に設置されていることが多いので、管理者等が第１強制運転スイッチ及び第２強制運転スイッチを見つけやすく操作しやすい。 Preferably, the changeover circuit according to the present invention is characterized in that the first forced operation switch and the second forced operation switch are provided in the controller. Therefore, the controller usually includes a first electric motor and a first electric motor. A manual control means for manually controlling the second electric motor is provided. Therefore, the controller is often installed in a position in the control panel that is easy for the administrator or the like to operate. It is easy to find and operate the 1 forced operation switch and the 2nd forced operation switch.

２台のポンプを制御するための制御盤を備えたマンホールポンプ施設の概要図。Schematic diagram of a manhole pump facility equipped with a control panel for controlling two pumps. 図１の制御盤の扉を開けた状態の正面図。The front view of the control panel of FIG. 1 with the door open. 本発明の一実施形態に係る切替回路を含む回路図。A circuit diagram including a switching circuit according to an embodiment of the present invention. （ａ）は制御盤内に設けられるコントローラの正面図。（ｂ）はコントローラの下面図。(A) is a front view of the controller provided in the control panel. (B) is a bottom view of the controller. （ａ）は本実施形態に係る切替回路が切替スイッチによって単独運転回路に切り替えられた時の回路図。（ｂ）は本実施形態に係る切替回路が切替スイッチによって並列運転回路に切り替えられた時の回路図。(A) is a circuit diagram when the changeover circuit according to this embodiment is switched to an independent operation circuit by a changeover switch. (B) is a circuit diagram when the changeover circuit according to this embodiment is switched to a parallel operation circuit by a changeover switch. （ａ）は制御盤の筐体本体に一体型底板が取り付けられる様子を示す分解斜視図。（ｂ）は制御盤の筐体本体に一体型底板が取り付けられた後の様子を示す斜視図。(A) is an exploded perspective view showing how the integrated bottom plate is attached to the housing body of the control panel. (B) is a perspective view showing a state after the integrated bottom plate is attached to the housing body of the control panel.

本発明に係る切替回路の一実施形態について、以下、図面を参照しつつ説明する。ただし、以下はあくまで本発明の一実施形態を例示的に示すものであり、本発明の範囲は以下の実施形態のみに限定されるものではなく、本発明の思想を逸脱しない範囲で適宜変更可能である。 An embodiment of the switching circuit according to the present invention will be described below with reference to the drawings. However, the following is merely an example of one embodiment of the present invention, and the scope of the present invention is not limited to the following embodiments, and can be appropriately changed without departing from the idea of the present invention. Is.

本実施形態に係る切替回路１は、図１に示すようなマンホールポンプ施設２で用いられる。マンホールポンプ施設２は、地下に埋設されて上流側から流入する家庭等から排出される汚水を貯留可能な水槽であるマンホール３と、マンホール３内に貯留された汚水を下流側へ排出するための第１ポンプ４及び第２ポンプ５と、第１ポンプ４及び第２ポンプ５の制御に用いるための情報を計測する計測装置６と、マンホール３の近くの地上に設置されて第１ポンプ４及び第２ポンプ５を制御するための制御盤７とを備える。制御盤７及び第１ポンプ４、制御盤７及び第２ポンプ５、並びに制御盤７及び計測装置６は、それぞれ電気的に接続されている。制御盤７は、図２に示すように、前面が開口した筐体７１と、筐体７１の前面の開口を開閉可能に閉塞する扉７２を備え、筐体７１内に、第１ポンプ４及び第２ポンプ５を制御するための各種機器が収められている。これらの制御盤７が有する各種機器と、第１ポンプ４及び第２ポンプ５と、計測装置６とが配線されて、図３に示すような回路が形成されており、切替回路１はこの回路に含まれる。 The switching circuit 1 according to the present embodiment is used in the manhole pump facility 2 as shown in FIG. The manhole pump facility 2 is a manhole 3 which is a water tank buried underground and capable of storing sewage discharged from a household or the like flowing in from the upstream side, and a manhole 3 for discharging the sewage stored in the manhole 3 to the downstream side. The first pump 4 and the second pump 5, the measuring device 6 for measuring the information used for controlling the first pump 4 and the second pump 5, and the first pump 4 and the first pump 4 installed on the ground near the manhole 3. A control panel 7 for controlling the second pump 5 is provided. The control panel 7 and the first pump 4, the control panel 7 and the second pump 5, and the control panel 7 and the measuring device 6 are electrically connected to each other. As shown in FIG. 2, the control panel 7 includes a housing 71 having an open front surface and a door 72 that closes the opening on the front surface of the housing 71 so as to be openable and closable. Various devices for controlling the second pump 5 are housed. Various devices included in these control panels 7, the first pump 4, the second pump 5, and the measuring device 6 are wired to form a circuit as shown in FIG. 3, and the switching circuit 1 is this circuit. include.

制御盤７内に形成される回路は、図３に示すように、回路に電力を供給する電源部１０と、電源部１０から第１ポンプ４へ電力を供給するための第１主回路１１と、電源部１０から第１ポンプ５へ電力を供給するための第２主回路１２と、第１ポンプ４及び第２ポンプ５の運転を制御するための制御回路１３とを備える。電源部１０は、例えば、外部から制御盤７内へ引き込まれる商用電源の電力メータ、電源の過電流等を遮断するブレーカ、商用電源と自家発電機の電源とを切り替える電源切替器、欠相・逆相等の電源の異常を検出する異常検出器、雷等のサージから回路を保護するサージ防護器等の機器で構成される。本実施形態では、電源部１０は三相３線２００Ｖの電源となっており、第１主回路１１及び第２主回路１２は、それぞれ電源部１０の３線が用いられて三相２００Ｖの電源が第１ポンプ４または第２ポンプ５と接続されるようになっており、また、制御回路１３は、電源部１０の３線のうちの２線が用いられて単相２００Ｖの電源が接続されるようになっている。第１主回路１１、第２主回路１２、及び制御回路１３には、漏電や過電流を遮断して回路を保護する第１漏電遮断器１４、第２漏電遮断器１５、及び制御用漏電遮断器１６がそれぞれ設けられている。 As shown in FIG. 3, the circuit formed in the control panel 7 includes a power supply unit 10 for supplying electric power to the circuit and a first main circuit 11 for supplying electric power from the power supply unit 10 to the first pump 4. A second main circuit 12 for supplying electric power from the power supply unit 10 to the first pump 5 and a control circuit 13 for controlling the operation of the first pump 4 and the second pump 5 are provided. The power supply unit 10 includes, for example, a power meter of a commercial power supply that is drawn into the control panel 7 from the outside, a breaker that cuts off overcurrent of the power supply, a power supply switch that switches between the commercial power supply and the power supply of a private generator, and a phase open. It consists of equipment such as an abnormality detector that detects abnormalities in the power supply such as reverse phase, and a surge protector that protects the circuit from surges such as lightning. In the present embodiment, the power supply unit 10 is a three-phase three-wire 200V power supply, and the first main circuit 11 and the second main circuit 12 are three-phase 200V power supplies using the three wires of the power supply unit 10, respectively. Is connected to the first pump 4 or the second pump 5, and the control circuit 13 is connected to a single-phase 200V power supply by using two of the three wires of the power supply unit 10. It has become so. The first main circuit 11, the second main circuit 12, and the control circuit 13 include a first earth leakage breaker 14, a second earth leakage breaker 15, and an earth leakage breaker for control, which protect the circuit by blocking electric leakage and overcurrent. Each vessel 16 is provided.

制御盤７内に設けられる各種機器は、図２及び図３に示すように、コントローラ２０と、第１電磁開閉器３０と、第２電磁開閉器４０とを含む。コントローラ２０は、予めコントローラ２０内に記憶されている各種プログラムに応じてコンピュータによる各種制御を行う制御部２１を備え、制御部２１は、計測装置６で計測された情報に基づいて第１ポンプ４及び第２ポンプ５の運転を自動で制御する自動制御手段２２と、管理者等が第１ポンプ４及び第２ポンプ５の運転を手動で操作する手動制御手段２３と、を有する。コントローラ２０は、図４に示すような筐体内に電子回路基板が収納されるように構成されており、その電子回路基板に各種電子部品が配線されて回路が形成されることで、制御部２１を含めたコントローラ２０が有する各種機能が実現されるように構成されている。コントローラ２０の筐体には不図示の入出力コネクタが設けられており、該入出力コネクタを介して、外部機器とコントローラ２０内の回路とを接続できるようになっている。 As shown in FIGS. 2 and 3, various devices provided in the control panel 7 include a controller 20, a first electromagnetic switch 30, and a second electromagnetic switch 40. The controller 20 includes a control unit 21 that performs various controls by a computer according to various programs stored in the controller 20 in advance, and the control unit 21 is a first pump 4 based on the information measured by the measuring device 6. It also has an automatic control means 22 for automatically controlling the operation of the second pump 5, and a manual control means 23 for the administrator or the like to manually operate the operations of the first pump 4 and the second pump 5. The controller 20 is configured so that an electronic circuit board is housed in a housing as shown in FIG. 4, and various electronic components are wired to the electronic circuit board to form a circuit, so that the controller 20 is a control unit 21. It is configured to realize various functions of the controller 20 including the above. An input / output connector (not shown) is provided in the housing of the controller 20, and an external device and a circuit in the controller 20 can be connected via the input / output connector.

自動制御手段２２は、上流側からマンホール３内へ流入する汚水がオーバーフローしないように、第１ポンプ４及び第２ポンプ５の運転を自動で制御する。例えば、本実施形態では、計測装置６として、図１に示すようなフロートスイッチを用いた例を示しており、フロートスイッチは、マンホール３内の所定の高さの位置に設けられ、マンホール３内に貯留された汚水の水位がフロートスイッチの設けられた位置を上回った時と下回った時とに信号を発するような装置となっている。自動制御手段２２は、このようなマンホール３内の水位を示すフロートスイッチから入力される信号に基づいて、マンホール３内に貯留された汚水の水位が所定の水位まで上がると第１ポンプ４及び第２ポンプ５の一方または両方を運転させ、水位が所定の水位まで下がると運転されている第１ポンプ４及び第２ポンプ５の一方または両方を停止させるといったような制御を自動で行う。 The automatic control means 22 automatically controls the operation of the first pump 4 and the second pump 5 so that the sewage flowing into the manhole 3 from the upstream side does not overflow. For example, in the present embodiment, an example in which a float switch as shown in FIG. 1 is used as the measuring device 6 is shown, and the float switch is provided at a predetermined height position in the manhole 3 and is provided in the manhole 3. It is a device that emits a signal when the water level of the sewage stored in the manhole exceeds and falls below the position where the float switch is provided. The automatic control means 22 sets the first pump 4 and the first pump 4 and the first pump 4 when the water level of the sewage stored in the manhole 3 rises to a predetermined water level based on the signal input from the float switch indicating the water level in the manhole 3. 2 One or both of the pumps 5 are operated, and when the water level drops to a predetermined water level, one or both of the first pump 4 and the second pump 5 which are operated are stopped automatically.

自動制御手段２２で制御に用いられる計測装置６の情報は、上記のフロートスイッチのような水位のみではなく、例えば、第１ポンプ４や第２ポンプ５の温度を計測する温度センサを計測装置６として用いて、一方のポンプの運転中に当該ポンプの温度が所定の温度を超えると、当該ポンプを停止させて他方のポンプを運転させるといったように、温度情報に基づいて第１ポンプ４及び第２ポンプ５の制御を行うようにしてもよく、自動制御手段２２で行う制御に応じた情報を計測できるような計測装置６が適宜設けられてよい。 The information of the measuring device 6 used for control by the automatic control means 22 is not limited to the water level such as the float switch described above, but for example, the measuring device 6 is a temperature sensor that measures the temperature of the first pump 4 and the second pump 5. When the temperature of the pump exceeds a predetermined temperature during the operation of one pump, the first pump 4 and the first pump 4 and the first pump are operated based on the temperature information, such as stopping the pump and operating the other pump. 2 The pump 5 may be controlled, and a measuring device 6 capable of measuring information according to the control performed by the automatic control means 22 may be appropriately provided.

マンホールポンプ施設２における第１ポンプ４及び第２ポンプ５の運転方式には、単独交互運転方式と並列運転方式との２つの運転方式がある。単独交互運転方式では、第１ポンプ４及び第２ポンプ５が２台同時に運転されることはなく、第１ポンプ４と第２ポンプ５とが１台ずつ交互に運転される。それに対して、並列運転方式では、第１ポンプ４及び第２ポンプ５のどちらか１台のみを運転させることもできるし、第１ポンプ４及び第２ポンプ５を２台同時に運転させることもできるようになっている。これら２つの運転方式のどちらを採用するかはマンホールポンプ施設２の設計時に決定される。それに応じて、ポンプの選定等も行われており、コントローラ２０の制御部２１には、採用された運転方式に応じた第１ポンプ４及び第２ポンプ５の制御が行われるようなプログラムがなされており、自動制御手段２２による第１ポンプ４及び第２ポンプ５の自動運転制御もそれに沿って行われる。 The operation methods of the first pump 4 and the second pump 5 in the manhole pump facility 2 include two operation methods, a single alternating operation method and a parallel operation method. In the single alternating operation method, the first pump 4 and the second pump 5 are not operated at the same time, and the first pump 4 and the second pump 5 are alternately operated one by one. On the other hand, in the parallel operation method, only one of the first pump 4 and the second pump 5 can be operated, or the first pump 4 and the second pump 5 can be operated at the same time. It has become like. Which of these two operation methods is adopted is determined at the time of designing the manhole pump facility 2. Pumps are also selected accordingly, and the control unit 21 of the controller 20 is programmed to control the first pump 4 and the second pump 5 according to the adopted operation method. Therefore, the automatic operation control of the first pump 4 and the second pump 5 by the automatic control means 22 is also performed accordingly.

手動制御手段２３は、ディスプレイや表示灯等によって構成される表示部２４と、管理者等が操作可能なスイッチ等によって構成される操作部２５とを備え、図４（ａ）に示すように、表示部２４及び操作部２５は、コントローラ２０の筐体の正面に露出するように設けられている。ここで、コントローラ２０の正面は、図２に示すように、制御盤７内にコントローラ２０が取り付けられた際に、制御盤７の前面の開口側に向けられる面のことをいう。管理者等は、表示部２４に表示される各種情報、例えば計測装置６によって計測された情報や操作部２５から入力された情報等、を見ながら、操作部２５を介して第１ポンプ４及び第２ポンプ５の運転を制御することができるようになっている。手動制御手段２３による制御は、制御部２１を介して行われるようになっており、例えば、単独運転方式の場合に、手動制御手段２３に第１ポンプ４及び第２ポンプ５を２台同時に運転させるような指令が入力されたとしてもどちらか一方しか運転させないとか、ポンプや電源の異常を知らせる信号がコントローラ２０に入力されている時には手動制御手段２３に入力された指令を出力しない等、制御部２１による安全確保のための制御が施されたものとなっている。 The manual control means 23 includes a display unit 24 composed of a display, an indicator light, and the like, and an operation unit 25 composed of a switch and the like that can be operated by an administrator and the like, and as shown in FIG. The display unit 24 and the operation unit 25 are provided so as to be exposed on the front surface of the housing of the controller 20. Here, as shown in FIG. 2, the front surface of the controller 20 refers to a surface facing the opening side of the front surface of the control panel 7 when the controller 20 is mounted in the control panel 7. The administrator or the like can see the various information displayed on the display unit 24, for example, the information measured by the measuring device 6 or the information input from the operation unit 25, and the first pump 4 and the first pump 4 and the like through the operation unit 25. The operation of the second pump 5 can be controlled. The control by the manual control means 23 is performed via the control unit 21, and for example, in the case of the independent operation method, the manual control means 23 operates two first pumps 4 and 2 pumps 5 at the same time. Controls such as operating only one of them even if a command to cause them to be input, or not outputting the command input to the manual control means 23 when a signal notifying an abnormality of the pump or power supply is input to the controller 20. The control for ensuring safety is performed by the unit 21.

第１電磁開閉器３０は、第１電磁接触器３１と第１サーマルリレー３６とから成る。第１電磁接触器３１は、第１コイル３２と、第１主接点３３と、第１補助接点３４とを有する。第１主接点３３及び第１補助接点３４は、第１コイル３２の通電状態に応じて連動して動作し、第１主接点３３は常開接点で第１コイル３２の通電時のみ閉となる、いわゆるａ接点となっており、第１補助接点３４は常閉接点で第１コイル３２の通電時のみ開となる、いわゆるｂ接点となっている。第１サーマルリレー３６は、第１ヒーター３７と、第１サーマル接点３８とを有する。第１サーマル接点３８は常閉接点で、第１ヒーター３７に過電流が流れることによって第１ヒーター３７の発熱が動作域に達すると開となる、いわゆるｂ接点となっている。 The first electromagnetic switch 30 includes a first electromagnetic contactor 31 and a first thermal relay 36. The first magnetic contactor 31 has a first coil 32, a first main contact 33, and a first auxiliary contact 34. The first main contact 33 and the first auxiliary contact 34 operate in conjunction with each other according to the energized state of the first coil 32, and the first main contact 33 is a normally open contact and is closed only when the first coil 32 is energized. The first auxiliary contact 34 is a normally closed contact and is a so-called b contact that is opened only when the first coil 32 is energized. The first thermal relay 36 has a first heater 37 and a first thermal contact 38. The first thermal contact 38 is a normally closed contact, and is a so-called b contact that opens when the heat generated by the first heater 37 reaches the operating range due to an overcurrent flowing through the first heater 37.

第２電磁開閉器４０は、第１電磁開閉器３０と同様の構成となっており、第２電磁接触器４１と第２サーマルリレー４６とから成る。第２電磁接触器４１は、第２コイル４２と、第２主接点４３と、第２補助接点４４とを有する。第２主接点４３及び第２補助接点４４は、第２コイル４２の通電状態に応じて連動して動作し、第２主接点４３は常開接点で第２コイル４２の通電時のみ閉となる、いわゆるａ接点となっており、第２補助接点４４は常閉接点で第２コイル４２の通電時のみ開となる、いわゆるｂ接点となっている。第２サーマルリレー４６は、第２ヒーター４７と、第２サーマル接点４８とを有する。第２サーマル接点４８は常閉接点で、第２ヒーター４７に過電流が流れることによって第２ヒーター４７の発熱が動作域に達すると開となる、いわゆるｂ接点となっている。 The second electromagnetic switch 40 has the same configuration as the first electromagnetic switch 30, and includes a second electromagnetic contactor 41 and a second thermal relay 46. The second magnetic contactor 41 has a second coil 42, a second main contact 43, and a second auxiliary contact 44. The second main contact 43 and the second auxiliary contact 44 operate in conjunction with each other according to the energized state of the second coil 42, and the second main contact 43 is a normally open contact and is closed only when the second coil 42 is energized. The second auxiliary contact 44 is a normally closed contact and is a so-called b contact that is opened only when the second coil 42 is energized. The second thermal relay 46 has a second heater 47 and a second thermal contact 48. The second thermal contact 48 is a normally closed contact, and is a so-called b contact that opens when the heat generated by the second heater 47 reaches the operating range due to an overcurrent flowing through the second heater 47.

図３に示すように、第１主回路１１は、第１主接点３３と、第１ヒーター３７とを備え、それぞれ第１ポンプ４に直列に接続されている。第２主回路１２は、第２主接点４３と、第２ヒーター４７とを備え、それぞれ第２ポンプ５に直列に接続されている。制御回路１３は、第１コイル３２と、第１サーマル接点３８と、第２コイル４２と、第２サーマル接点４８とを備え、第１コイル３２及び第１サーマル接点３８が直列に接続され、第２コイル４２及び第２サーマル接点４８が直列に接続されている。制御回路１３の第１コイル３２に電流が流れている時は、第１主回路１１の第１主接点３３が閉となって第１ポンプ４までの電路が繋がって第１ポンプ４が運転され、第１コイル３２に電流が流れていない時は、第１主接点３３が開となって第１ポンプ４までの電路が切断されて第１ポンプ４が停止される。また、第２コイル４２に電流が流れている時は、第２主回路１２の第２主接点４３が閉となって第２ポンプ５までの電路が繋がって第２ポンプ５が運転され、第２コイル４２に電流が流れていない時は、第２主接点４３が開となって第２ポンプ５までの電路が切断されて第２ポンプ５が停止される。このように、制御回路１３の第１コイル３２及び第２コイル４２への電源の入切によって、第１ポンプ４及び第２ポンプ５の運転がそれぞれ制御される。 As shown in FIG. 3, the first main circuit 11 includes a first main contact 33 and a first heater 37, each of which is connected in series to the first pump 4. The second main circuit 12 includes a second main contact 43 and a second heater 47, each of which is connected in series to the second pump 5. The control circuit 13 includes a first coil 32, a first thermal contact 38, a second coil 42, and a second thermal contact 48, and the first coil 32 and the first thermal contact 38 are connected in series, and the first coil 32 and the first thermal contact 38 are connected in series. The two coils 42 and the second thermal contact 48 are connected in series. When a current is flowing through the first coil 32 of the control circuit 13, the first main contact 33 of the first main circuit 11 is closed, the electric circuit to the first pump 4 is connected, and the first pump 4 is operated. When no current is flowing through the first coil 32, the first main contact 33 is opened, the electric circuit to the first pump 4 is cut off, and the first pump 4 is stopped. Further, when a current is flowing through the second coil 42, the second main contact 43 of the second main circuit 12 is closed, the electric path to the second pump 5 is connected, and the second pump 5 is operated, and the second pump 5 is operated. When no current is flowing through the two coils 42, the second main contact 43 is opened, the electric circuit to the second pump 5 is cut, and the second pump 5 is stopped. In this way, the operation of the first pump 4 and the second pump 5 is controlled by turning on / off the power to the first coil 32 and the second coil 42 of the control circuit 13, respectively.

第１サーマルリレー３６及び第２サーマルリレー４６は、それぞれ第１ポンプ４または第２ポンプ５を発熱による焼損から保護するために設けられている。第１サーマルリレー３６によると、第１ポンプ４の運転中は第１主回路１１に電流が流れているので、第１主回路１１に設けられた第１ヒーター３７にも電流が流れる。この時、過負荷や欠相等によって過電流が第１主回路１１に流れると、第１ヒーター３７が過熱されて、制御回路１３において第１コイル３２に直列に接続された第１サーマル接点３８が開となるので、第１コイル３２に流れていた電流が遮断される。それによって、第１主回路１１の第１主接点３３が開となり、第１主回路１１が切断されて第１ポンプ４が停止される。第２サーマルリレー４６も、第１サーマルリレー３６と同様に、第２ヒーター４７が過熱されると第２サーマル接点４８が開となって第２ポンプ５を停止させる。図３では、第１ヒーター３７及び第２ヒーター４７が三相３線２００Ｖの電源の三相のそれぞれに接続される３素子型の第１サーマルリレー３６及び第２サーマルリレー４６の例を示しているが、例えば単相の電動機を用いた場合等、欠相による過電流からの熱保護が必要ない場合には２素子型のサーマルリレーを用いてもよいし、サーマルリレーによる保護が必要ない場合にはサーマルリレーを設けなくてもよい。 The first thermal relay 36 and the second thermal relay 46 are provided to protect the first pump 4 or the second pump 5 from burning due to heat generation, respectively. According to the first thermal relay 36, since the current flows through the first main circuit 11 during the operation of the first pump 4, the current also flows through the first heater 37 provided in the first main circuit 11. At this time, when an overcurrent flows through the first main circuit 11 due to overload, phase loss, etc., the first heater 37 is overheated, and the first thermal contact 38 connected in series with the first coil 32 in the control circuit 13 Since it is opened, the current flowing through the first coil 32 is cut off. As a result, the first main contact 33 of the first main circuit 11 is opened, the first main circuit 11 is cut off, and the first pump 4 is stopped. Similarly to the first thermal relay 36, the second thermal relay 46 also opens the second thermal contact 48 when the second heater 47 is overheated to stop the second pump 5. FIG. 3 shows an example of a three-element type first thermal relay 36 and second thermal relay 46 in which the first heater 37 and the second heater 47 are connected to each of the three phases of a three-phase three-wire 200V power supply. However, when thermal protection from overcurrent due to open phase is not required, for example, when a single-phase electric motor is used, a two-element thermal relay may be used, or when protection by a thermal relay is not required. It is not necessary to provide a thermal relay in the.

制御回路１３は、図３に示すように、電源部１０からコントローラ２０の制御部２１を介して第１コイル３２及び第１サーマル接点３８に接続されて電源部１０へ戻る第１コントローラ回路１７と、電源部１０からコントローラ２０の制御部２１を介して第２コイル４２及び第２サーマル接点４８に接続されて電源部１０へ戻る第２コントローラ回路１８と、切替回路１とを有する。 As shown in FIG. 3, the control circuit 13 is connected to the first coil 32 and the first thermal contact 38 from the power supply unit 10 via the control unit 21 of the controller 20 and returns to the power supply unit 10. It has a second controller circuit 18 which is connected to the second coil 42 and the second thermal contact 48 from the power supply unit 10 via the control unit 21 of the controller 20 and returns to the power supply unit 10, and a switching circuit 1.

制御部２１は、電源部１０からの電源を第１コントローラ回路１７及び第２コントローラ回路１８へそれぞれ入力するか切断するかを制御できるように構成されており、自動制御手段２２及び手動制御手段２３は、第１コントローラ回路１７及び第２コントローラ回路１８によって、第１ポンプ４及び第２ポンプ５の運転の制御を行う。自動制御手段２２または手動制御手段２３から第１ポンプ４を運転させる指令を受けると、制御部２１は、第１コントローラ回路１７へ電源を入力することで第１コイル３２へ電流を流して第１ポンプ４を運転させる。自動制御手段２２または手動制御手段２３から第１ポンプ４を停止させる指令を受けると、制御部２１は第１コントローラ回路１７への電源を切断することで第１コイル３２に流れる電流を遮断して第１ポンプ４を停止させる。同様に、制御部２１の第２コントローラ回路１８への電源の入切によって、第２ポンプ５の運転・停止が制御される。 The control unit 21 is configured to be able to control whether to input or disconnect the power supply from the power supply unit 10 to the first controller circuit 17 and the second controller circuit 18, respectively, and the automatic control means 22 and the manual control means 23. Controls the operation of the first pump 4 and the second pump 5 by the first controller circuit 17 and the second controller circuit 18. Upon receiving a command from the automatic control means 22 or the manual control means 23 to operate the first pump 4, the control unit 21 sends a current to the first coil 32 by inputting a power supply to the first controller circuit 17, and the first one. Operate the pump 4. Upon receiving a command from the automatic control means 22 or the manual control means 23 to stop the first pump 4, the control unit 21 cuts off the current flowing through the first coil 32 by cutting off the power supply to the first controller circuit 17. The first pump 4 is stopped. Similarly, the operation / stop of the second pump 5 is controlled by turning on / off the power to the second controller circuit 18 of the control unit 21.

切替回路１は、第１ポンプ４の運転を制御する第１制御回路６１と、第２ポンプ５の運転を制御する第２制御回路６２とを有する。 The switching circuit 1 includes a first control circuit 61 that controls the operation of the first pump 4, and a second control circuit 62 that controls the operation of the second pump 5.

第１制御回路６１は、第１切替スイッチ５７と、第２補助接点４４と、第１強制運転スイッチ５１とを有し、電源部１０から第２補助接点４４及び第１強制運転スイッチ５１を経由して第１コイル３２及び第１サーマル接点３８に接続されて電源部１０へ戻る第１インターロック回路６３と、電源部１０から第２補助接点４４を迂回して第１強制運転スイッチ５１を経由して第１コイル３２及び第１サーマル接点３８に接続されて電源部１０へ戻る第１迂回回路６５との２つの回路を、第１切替スイッチ５７によって切り替えることができるような回路となっている。第１強制運転スイッチ５１は、管理者等が手動で操作可能な物理的なスイッチであり、いわゆるａ接点で、第１強制運転スイッチ５１をオンにすると閉となり、第１強制運転スイッチ５１をオフにすると開となる。第１切替スイッチ５７は、いわゆるｃ接点で、共通端子と常閉端子と常開端子とを有し、共通端子及び常閉端子の間が閉かつ共通端子及び常開端子の間が開の状態と、共通端子及び常閉端子の間が開かつ共通端子及び常開端子の間が閉の状態との切り替えが可能となっており、常閉端子に接続された回路と常開端子に接続された回路とを切り替える。第１切替スイッチ５７の常閉端子及び常開端子には、それぞれ第１インターロック回路６３と第１迂回回路６５とが接続される。 The first control circuit 61 has a first changeover switch 57, a second auxiliary contact 44, and a first forced operation switch 51, and passes from the power supply unit 10 via the second auxiliary contact 44 and the first forced operation switch 51. The first interlock circuit 63, which is connected to the first coil 32 and the first thermal contact 38 and returns to the power supply unit 10, bypasses the second auxiliary contact 44 from the power supply unit 10 and passes through the first forced operation switch 51. The circuit is such that the two circuits of the first detour circuit 65, which is connected to the first coil 32 and the first thermal contact 38 and returns to the power supply unit 10, can be switched by the first changeover switch 57. .. The first forced operation switch 51 is a physical switch that can be manually operated by an administrator or the like. It is a so-called a contact, and is closed when the first forced operation switch 51 is turned on, and the first forced operation switch 51 is turned off. When set to, it becomes open. The first changeover switch 57 is a so-called c-contact, and has a common terminal, a normally closed terminal, and a normally open terminal, and is in a state where the common terminal and the normally closed terminal are closed and the common terminal and the normally open terminal are open. It is possible to switch between the state where the common terminal and the normally closed terminal are open and the state where the common terminal and the normally open terminal are closed, and the circuit connected to the normally closed terminal and the normally open terminal are connected. Switch with the circuit. The first interlock circuit 63 and the first detour circuit 65 are connected to the normally closed terminal and the normally opened terminal of the first changeover switch 57, respectively.

第２制御回路６２は、第２切替スイッチ５８と、第１補助接点３４と、第２強制運転スイッチ５２とを有し、電源部１０から第１補助接点３４及び第２強制運転スイッチ５２を経由して第２コイル４２及び第２サーマル接点４８に接続されて電源部１０へ戻る第２インターロック回路６４と、電源部１０から第１補助接点３４を迂回して第２強制運転スイッチ５２を経由して第２コイル４２及び第２サーマル接点４８に接続されて電源部１０へ戻る第２迂回回路６６との２つの回路を、第２切替スイッチ５８によって切り替えることができるような回路となっている。第２強制運転スイッチ５２は、管理者等が手動で操作可能な物理的なスイッチであり、いわゆるａ接点で、第２強制運転スイッチ５２をオンにすると閉となり、第２強制運転スイッチ５２をオフにすると開となる。第２切替スイッチ５８は、いわゆるｃ接点で、共通端子と常閉端子と常開端子とを有し、共通端子及び常閉端子の間が閉かつ共通端子及び常開端子の間が開の状態と、共通端子及び常閉端子の間が開かつ共通端子及び常開端子の間が閉の状態との切り替えが可能となっており、常閉端子に接続された回路と常開端子に接続された回路とを切り替える。第２切替スイッチ５８の常閉端子及び常開端子には、それぞれ第２インターロック回路６４と第２迂回回路６６とが接続される。 The second control circuit 62 has a second changeover switch 58, a first auxiliary contact 34, and a second forced operation switch 52, and is transmitted from the power supply unit 10 via the first auxiliary contact 34 and the second forced operation switch 52. Then, the second interlock circuit 64, which is connected to the second coil 42 and the second thermal contact 48 and returns to the power supply unit 10, bypasses the first auxiliary contact 34 from the power supply unit 10 and passes through the second forced operation switch 52. The circuit is such that the two circuits, that is, the second detour circuit 66 that is connected to the second coil 42 and the second thermal contact 48 and returns to the power supply unit 10, can be switched by the second changeover switch 58. .. The second forced operation switch 52 is a physical switch that can be manually operated by an administrator or the like. It is a so-called a contact, and is closed when the second forced operation switch 52 is turned on, and the second forced operation switch 52 is turned off. When set to, it becomes open. The second changeover switch 58 is a so-called c-contact, and has a common terminal, a normally closed terminal, and a normally open terminal, and is in a state where the common terminal and the normally closed terminal are closed and the common terminal and the normally open terminal are open. It is possible to switch between the state where the common terminal and the normally closed terminal are open and the state where the common terminal and the normally open terminal are closed, and the circuit connected to the normally closed terminal and the normally open terminal are connected. Switch with the circuit. A second interlock circuit 64 and a second bypass circuit 66 are connected to the normally closed terminal and the normally opened terminal of the second changeover switch 58, respectively.

第１切替スイッチ５７及び第２切替スイッチ５８は、１つの２極双投形の切替スイッチ５６として設けられている。切替スイッチ５６は、管理者等が手動で操作可能な物理的なスイッチで、切替スイッチ５６を操作して切り替えると、第１切替スイッチ５７及び第２切替スイッチ５８が連動して動作するようになっている。第１制御回路６１が第１インターロック回路６３に切り替えられた状態の時は、第２制御回路６２が第２インターロック回路６４に切り替えられた状態となり、また、第１制御回路６１が第１迂回回路６５に切り替えられた状態の時は、第２制御回路６２が第２迂回回路６６に切り替えられた状態となるようになっている。第１制御回路６１が第１インターロック回路６３かつ第２制御回路６２が第２インターロック回路６４に切り替えられた回路を単独運転回路６７とし、第１制御回路６１が第１迂回回路６５かつ第２制御回路６２が第２迂回回路６６に切り替えられた回路を並列運転回路６８とすると、切替回路１は、切替スイッチ５６の操作によって、単独運転回路６７と並列運転回路６８との２つの回路のいずれかに切り替え可能に構成された回路となっている。 The first changeover switch 57 and the second changeover switch 58 are provided as one two-pole double-throw type changeover switch 56. The changeover switch 56 is a physical switch that can be manually operated by an administrator or the like, and when the changeover switch 56 is operated to switch, the first changeover switch 57 and the second changeover switch 58 operate in conjunction with each other. ing. When the first control circuit 61 is switched to the first interlock circuit 63, the second control circuit 62 is switched to the second interlock circuit 64, and the first control circuit 61 is the first. When the circuit is switched to the bypass circuit 65, the second control circuit 62 is switched to the second bypass circuit 66. The circuit in which the first control circuit 61 is the first interlock circuit 63 and the second control circuit 62 is switched to the second interlock circuit 64 is the independent operation circuit 67, and the first control circuit 61 is the first detour circuit 65 and the first. 2 Assuming that the circuit in which the control circuit 62 is switched to the second detour circuit 66 is a parallel operation circuit 68, the changeover circuit 1 is composed of two circuits, an independent operation circuit 67 and a parallel operation circuit 68, by operating the changeover switch 56. The circuit is configured so that it can be switched to either one.

図５（ａ）に示すように、切替回路１が切替スイッチ５６によって単独運転回路６７に切り替えられている時、第１ポンプ４及び第２ポンプ５が停止した状態で、第１強制運転スイッチ５１をオンにすると、第２補助接点４４と第１強制運転スイッチ５１とが共に閉となっているので、第１制御回路６１が繋がって第１コイル３２に電流が流れ、それによって第１主接点３３が閉となり、第１主回路１１が繋がって第１ポンプ４が運転される。第１ポンプ４の運転中は第１コイル３２に電流が流れているので、第１補助接点３４が開となっており、この時、第２強制運転スイッチ５２をオンにしたとしても、第２制御回路６２は第２インターロック回路６４で、第１補助接点３４が第２コイル４２に直列に接続されているので、第２制御回路６２は切断されたままで第２コイル４２に電流は流れずに、第２ポンプ５は運転されない。第１強制運転スイッチ５１をオフにすると、第１制御回路６１が切断されて第１コイル３２に電流が流れなくなり、第１主接点３３が開となって、第１主回路１１が切断されて第１ポンプ４が停止される。それと同時に第１補助接点３４が閉となるため、第２強制運転スイッチ５２がオンになっていると、第２制御回路６２が繋がって第２コイル４２に電流が流れ、第２主接点４３が閉となって第２主回路１２が繋がって第２ポンプ５が運転される。第２ポンプ５の運転中は、第２コイル４２に電流が流れているので、第２補助接点４４が開となっており、この時、第１強制運転スイッチ５１をオンにしたとしても、第１制御回路６１は第１インターロック回路６３で、第２補助接点４４が第１コイル３２に直列に接続されているので、第１制御回路６１は切断されたままで第１コイル３２に電流は流れずに、第１ポンプ４は運転されない。 As shown in FIG. 5A, when the changeover circuit 1 is switched to the independent operation circuit 67 by the changeover switch 56, the first forced operation switch 51 is stopped while the first pump 4 and the second pump 5 are stopped. When is turned on, both the second auxiliary contact 44 and the first forced operation switch 51 are closed, so that the first control circuit 61 is connected and a current flows through the first coil 32, thereby causing the first main contact. 33 is closed, the first main circuit 11 is connected, and the first pump 4 is operated. Since the current is flowing through the first coil 32 during the operation of the first pump 4, the first auxiliary contact 34 is open. At this time, even if the second forced operation switch 52 is turned on, the second auxiliary contact 34 is open. Since the control circuit 62 is the second interlock circuit 64 and the first auxiliary contact 34 is connected in series with the second coil 42, the second control circuit 62 remains disconnected and no current flows through the second coil 42. In addition, the second pump 5 is not operated. When the first forced operation switch 51 is turned off, the first control circuit 61 is disconnected, no current flows through the first coil 32, the first main contact 33 is opened, and the first main circuit 11 is disconnected. The first pump 4 is stopped. At the same time, the first auxiliary contact 34 is closed. Therefore, when the second forced operation switch 52 is turned on, the second control circuit 62 is connected and a current flows through the second coil 42, so that the second main contact 43 is closed. When closed, the second main circuit 12 is connected and the second pump 5 is operated. Since the current is flowing through the second coil 42 during the operation of the second pump 5, the second auxiliary contact 44 is open. At this time, even if the first forced operation switch 51 is turned on, the second auxiliary contact 44 is open. Since the 1 control circuit 61 is the 1st interlock circuit 63 and the 2nd auxiliary contact 44 is connected in series with the 1st coil 32, the current flows through the 1st coil 32 while the 1st control circuit 61 is disconnected. Without, the first pump 4 is not operated.

このように、単独運転回路６７では、第１強制運転スイッチ５１を操作することによって第１ポンプ４の運転を制御することができ、第２強制運転スイッチ５２を操作することによって第２ポンプ５の運転を制御することができるが、第１運転強制スイッチ５１と第２強制運転スイッチ５２とを２つともオンにしたとしても、第１ポンプ４及び第２ポンプ５は２台同時には運転されずに、どちらか一方のみが運転されるようになっている。 As described above, in the independent operation circuit 67, the operation of the first pump 4 can be controlled by operating the first forced operation switch 51, and the operation of the second pump 5 can be controlled by operating the second forced operation switch 52. Although the operation can be controlled, even if both the first forced operation switch 51 and the second forced operation switch 52 are turned on, the first pump 4 and the second pump 5 are not operated at the same time. In addition, only one of them is operated.

図５（ｂ）に示すように、切替回路１が切替スイッチ５６によって並列運転回路６８に切り替えられている時、第１強制運転スイッチ５１をオンにすると、第１制御回路６１が繋がって第１コイル３２に電流が流れ、それによって第１主接点３３が閉となり、第１主回路１１が繋がって第１ポンプ４が運転される。第１ポンプ４の運転中は第１コイル３２に電流が流れているので、第１補助接点３４が開となっているが、第２制御回路６２は第２迂回回路６６で、第１補助接点３４を迂回して通らないような回路となっているので、この時、第２強制運転スイッチ５２をオンにすると、第２制御回路６２が繋がって第２コイル４２に電流が流れ、第２主接点４３が閉となって第２主回路１２が繋がって第２ポンプ５も運転される。第２ポンプ５の運転中は、第２コイル４２に電流が流れているので、第２補助接点４４が開となっているが、第１制御回路６１は第１迂回回路６５で、第２補助接点４４を迂回して通らないような回路となっているので、第１強制運転スイッチ５１をオンにしている間は、第１制御回路６１が切断されることはなく、第１ポンプ４は停止されない。 As shown in FIG. 5B, when the changeover circuit 1 is switched to the parallel operation circuit 68 by the changeover switch 56, when the first forced operation switch 51 is turned on, the first control circuit 61 is connected to the first. A current flows through the coil 32, whereby the first main contact 33 is closed, the first main circuit 11 is connected, and the first pump 4 is operated. Since the current is flowing through the first coil 32 during the operation of the first pump 4, the first auxiliary contact 34 is open, but the second control circuit 62 is the second bypass circuit 66 and the first auxiliary contact. Since the circuit is designed so that it does not pass around 34, when the second forced operation switch 52 is turned on at this time, the second control circuit 62 is connected and a current flows through the second coil 42, and the second main The contact 43 is closed, the second main circuit 12 is connected, and the second pump 5 is also operated. During the operation of the second pump 5, since the current is flowing through the second coil 42, the second auxiliary contact 44 is open, but the first control circuit 61 is the first detour circuit 65 and the second auxiliary. Since the circuit is designed so as not to bypass the contact 44, the first control circuit 61 is not disconnected and the first pump 4 is stopped while the first forced operation switch 51 is turned on. Not done.

このように、並列運転回路６８では、第１強制運転スイッチ５１を操作することによって第１ポンプ４の運転を制御することができ、第２強制運転スイッチ５２を操作することによって第２ポンプ５の運転を制御することができ、第１強制運転スイッチ５１及び第２強制運転スイッチ５２を２つともオンにすると、第１ポンプ４及び第２ポンプ５を２台同時に運転できるようになっている。 In this way, in the parallel operation circuit 68, the operation of the first pump 4 can be controlled by operating the first forced operation switch 51, and the operation of the second pump 5 can be controlled by operating the second forced operation switch 52. The operation can be controlled, and when both the first forced operation switch 51 and the second forced operation switch 52 are turned on, the first pump 4 and the second pump 5 can be operated at the same time.

図３に示すように、第１コントローラ回路１７と、切替回路１の第１制御回路６１とは、第１コイル３２及び第１サーマル接点３８を除いて並列回路となっており、そのため、第１強制運転スイッチ５１をオンにすることによって第１制御回路６１が繋がると、第１コントローラ回路１７の制御部２１の制御に依らず、第１制御回路６１を介して第１コイル３２に電流が流れて第１ポンプ４が強制的に運転される。また、第２コントローラ回路１８と、切替回路１の第２制御回路６２とは、第２コイル４２及び第２サーマル接点４８を除いて並列回路となっており、そのため、第２強制運転スイッチ５２をオンにすることによって第２制御回路６２が繋がると、第２コントローラ回路１８の制御部２１の制御に依らず、第２制御回路６２を介して第２コイル４２に電流が流れて第２ポンプ５が強制的に運転される。このように、切替回路１は、第１ポンプ４及び第２ポンプ５の一方または両方を強制的に運転させるための回路となっている。 As shown in FIG. 3, the first controller circuit 17 and the first control circuit 61 of the switching circuit 1 are parallel circuits except for the first coil 32 and the first thermal contact 38, and therefore, the first When the first control circuit 61 is connected by turning on the forced operation switch 51, a current flows through the first coil 32 via the first control circuit 61 regardless of the control of the control unit 21 of the first controller circuit 17. The first pump 4 is forcibly operated. Further, the second controller circuit 18 and the second control circuit 62 of the switching circuit 1 are parallel circuits except for the second coil 42 and the second thermal contact 48. Therefore, the second forced operation switch 52 is used. When the second control circuit 62 is connected by turning it on, a current flows to the second coil 42 via the second control circuit 62 regardless of the control of the control unit 21 of the second controller circuit 18, and the second pump 5 Is forced to drive. As described above, the switching circuit 1 is a circuit for forcibly operating one or both of the first pump 4 and the second pump 5.

コントローラ２０の制御部２１が正常に動作している場合において、平常時には、自動制御手段２２によって第１コントローラ回路１７及び第２コントローラ回路１８を介して第１ポンプ４及び第２ポンプ５の制御が自動で行われる。また、メンテナンスの際や、マンホール３への汚水の流入量が少なく自動制御手段２２による第１ポンプ４及び第２ポンプ５の運転間隔が長くなって汚水が長期間マンホール３へ滞留している場合等、手動で第１ポンプ４及び第２ポンプ５を運転する必要がある場合でも、手動制御手段２３によって第１コントローラ回路１７及び第２コントローラ回路１８を介して第１ポンプ４及び第２ポンプ５の制御が行われる。このような自動制御手段２２による自動制御や手動制御手段２３による手動制御では、予め制御部２１に設定されている単独交互運転方式または並列運転方式に沿って第１ポンプ４及び第２ポンプ５が運転される。 When the control unit 21 of the controller 20 is operating normally, in normal times, the automatic control means 22 controls the first pump 4 and the second pump 5 via the first controller circuit 17 and the second controller circuit 18. It is done automatically. Further, during maintenance or when the amount of sewage flowing into the manhole 3 is small and the operation interval of the first pump 4 and the second pump 5 by the automatic control means 22 becomes long and the sewage stays in the manhole 3 for a long period of time. Etc., even when it is necessary to manually operate the first pump 4 and the second pump 5, the first pump 4 and the second pump 5 are manually operated via the first controller circuit 17 and the second controller circuit 18 by the manual control means 23. Is controlled. In such automatic control by the automatic control means 22 and manual control by the manual control means 23, the first pump 4 and the second pump 5 are set according to the independent alternating operation method or the parallel operation method set in advance in the control unit 21. Be driven.

しかし、コントローラ２０が故障し、制御部２１に異常が発生した場合には、自動制御手段２２による自動制御や手動制御手段２３による手動制御が行えずに、第１ポンプ４や第２ポンプ５を運転できずに、マンホール３から汚水がオーバーフローしてしまう虞がある。切替回路１は、このようなコントローラ２０が故障した場合に、コントローラ２０の制御に依らずに、第１ポンプ４や第２ポンプ５を強制的に運転させるための回路となっており、強制運転スイッチ５１をオンにすると第１ポンプ４が、強制運転スイッチ５２をオンにすると第２ポンプ５がそれぞれ強制的に運転されるようになっている。 However, when the controller 20 fails and an abnormality occurs in the control unit 21, the first pump 4 and the second pump 5 cannot be controlled automatically by the automatic control means 22 or the manual control means 23. There is a risk that sewage will overflow from the manhole 3 without being able to operate. The switching circuit 1 is a circuit for forcibly operating the first pump 4 and the second pump 5 without being controlled by the controller 20 when such a controller 20 fails. When the switch 51 is turned on, the first pump 4 is forcibly operated, and when the forced operation switch 52 is turned on, the second pump 5 is forcibly operated.

しかし、並列運転方式の場合には、強制運転スイッチ５１及び強制運転スイッチ５２を２つともオンにした時に、第１ポンプ４及び第２ポンプ５が２台同時に運転されても問題ないが、単独交互運転方式の場合には、強制運転スイッチ５１及び強制運転スイッチ５２を２つともオンにした時に、第１ポンプ４及び第２ポンプ５が２つ同時に運転されてしまうと、ポンプ等の機器等が故障してしまう虞がある。切替回路１は、強制運転スイッチ５１及び強制運転スイッチ５２を２つともオンにしても、第１ポンプ４及び第２ポンプ５のどちらか一方しか運転されない単独運転回路６７と、強制運転スイッチ５１及び強制運転スイッチ５２を２つともオンにすると、第２ポンプ４及び第２ポンプ５が２台同時に運転される並列運転回路６８とを備えており、切替スイッチ５６を操作することによって単独運転回路６７と並列運転回路６８とを切り替えることができるようになっているので、単独交互運転方式の場合には、切替回路１を単独運転回路６７に切り替えて、並列運転方式の場合には、切替回路１を並列運転回路６８に切り替えるというようにする。 However, in the case of the parallel operation method, when both the forced operation switch 51 and the forced operation switch 52 are turned on, there is no problem even if the first pump 4 and the second pump 5 are operated at the same time, but they are independent. In the case of the alternating operation method, when both the forced operation switch 51 and the forced operation switch 52 are turned on, if the first pump 4 and the second pump 5 are operated at the same time, equipment such as a pump or the like May break down. The changeover circuit 1 includes an independent operation circuit 67 in which only one of the first pump 4 and the second pump 5 is operated even if both the forced operation switch 51 and the forced operation switch 52 are turned on, and the forced operation switch 51 and the changeover circuit 1. When both the forced operation switches 52 are turned on, the second pump 4 and the second pump 5 are provided with a parallel operation circuit 68 which is operated at the same time. By operating the changeover switch 56, the independent operation circuit 67 is provided. And the parallel operation circuit 68 can be switched. Therefore, in the case of the independent alternating operation method, the switching circuit 1 is switched to the independent operation circuit 67, and in the case of the parallel operation method, the switching circuit 1 Is switched to the parallel operation circuit 68.

このように、マンホールポンプ施設２で採用されている運転方式に合わせて、切替回路１を単独運転回路６７と並列運転回路６８とのどちらか一方に切り替えることができるので、単独交互運転方式では、単独運転回路６７によって強制運転でも第１ポンプ４及び第２ポンプ５を２台同時には運転できないようにして、並列運転方式では、並列運転回路６８によって強制運転で第１ポンプ４及び第２ポンプ５を２台同時に運転できるようにすることができる。 In this way, the switching circuit 1 can be switched to either the independent operation circuit 67 or the parallel operation circuit 68 according to the operation method adopted in the manhole pump facility 2. Therefore, in the independent alternating operation method, the switching circuit 1 can be switched to either one. In the parallel operation method, the first pump 4 and the second pump 5 are forced to operate by the parallel operation circuit 68 so that the first pump 4 and the second pump 5 cannot be operated at the same time even in the forced operation by the independent operation circuit 67. Can be operated at the same time.

もし、単独交互運転方式のマンホールポンプ施設２には単独運転回路６７を、並列運転方式のマンホールポンプ施設２には並列運転回路６８を、それぞれ個別に設けるようにした場合には、運転方式の違いによって、単独運転回路６７と並列運転回路６８との２通りの異なる回路の配線作業を行う必要があるため、製作時や出荷時等に運転方式と回路の配線が合っていることの確認作業を行う必要が生じる等、余分な手間がかかってしまう。それに対して、切替回路１は、単独運転回路６７と並列運転回路６８とが統合されて、切替スイッチ５６によって切り替えることができるように構成されているため、単独交互運転方式と並列運転方式とのどちらにも適用でき、１通りの切替回路１の配線作業を行うだけでよいので、運転方式の違いによる配線の確認作業等の余分な手間を削減し、製作効率を向上させることができる。 If the independent operation circuit 67 is individually provided in the manhole pump facility 2 of the independent alternating operation system and the parallel operation circuit 68 is individually provided in the manhole pump facility 2 of the parallel operation system, the operation method is different. Therefore, it is necessary to perform wiring work for two different circuits, the independent operation circuit 67 and the parallel operation circuit 68, so it is necessary to confirm that the operation method and the circuit wiring match at the time of manufacture or shipment. It takes extra time and effort, such as the need to do it. On the other hand, since the switching circuit 1 is configured so that the independent operation circuit 67 and the parallel operation circuit 68 are integrated and can be switched by the changeover switch 56, the independent alternating operation method and the parallel operation method can be used. Since it can be applied to both of them and it is only necessary to perform the wiring work of the switching circuit 1 in one way, it is possible to reduce extra labor such as wiring confirmation work due to the difference in the operation method and improve the manufacturing efficiency.

単独交互運転方式と並列運転方式とのどちらを採用するかは、マンホールポンプ施設２の設計時に決定されるので、最初に運転方式に合わせて切替回路１を切替スイッチ５６によって単独運転回路６７と並列運転回路６８とのどちらかに切り替えた後は、通常は、運転方式を変更することはないので、切替スイッチ５６は操作されない。そのため、切替スイッチ５６は、マンホールポンプ施設２の定期的なメンテナンス等を行う通常の管理者等が簡単に操作できないように、隠されて設けられていることが好ましい。 Whether to adopt the single alternating operation method or the parallel operation method is determined at the time of designing the manhole pump facility 2, so that the changeover circuit 1 is first paralleled with the single operation circuit 67 by the changeover switch 56 according to the operation method. After switching to either the operation circuit 68 or the operation circuit 68, normally, the operation method is not changed, so that the changeover switch 56 is not operated. Therefore, it is preferable that the changeover switch 56 is hidden so that it cannot be easily operated by an ordinary administrator or the like who performs regular maintenance of the manhole pump facility 2.

本実施形態では、図３及び図４に示すように、切替スイッチ５６は、コントローラ２０の内部に設けられている。また、強制運転スイッチ５１及び強制運転スイッチ５２もコントローラ２０の内部に設けられ、切替スイッチ５６、強制運転スイッチ５１及び強制運転スイッチ５２を含む回路の配線がコントローラ２０内の基板上に実装されている。これによって、コントローラ２０の外部の配線作業を簡素化することができるので、作業効率の向上や制御盤７内の省スペース化等の効果が得られる。 In this embodiment, as shown in FIGS. 3 and 4, the changeover switch 56 is provided inside the controller 20. Further, the forced operation switch 51 and the forced operation switch 52 are also provided inside the controller 20, and the wiring of the circuit including the changeover switch 56, the forced operation switch 51 and the forced operation switch 52 is mounted on the board in the controller 20. .. As a result, the wiring work outside the controller 20 can be simplified, so that the effects such as improvement of work efficiency and space saving in the control panel 7 can be obtained.

また、図４（ｂ）に示すように、切替スイッチ５６は、コントローラ２０の筐体の下面側に設けられた凹部に設置されて、コントローラ２０の筐体の下面から出っ張らないようになっており、図４（ａ）に示すように、手動制御手段２３の表示部２４や操作部２５が設けられているコントローラ２０の筐体の正面側からは、切替スイッチ５６は隠れて見えないようになっている。そのため、管理者等が手動制御手段２３を操作する際でも、管理者等に切替スイッチ５６の存在に気付かれにくく切替スイッチ５６をいたずらに操作されてしまうことが無い。ここでは、コントローラ２０の筐体の下面側に切替スイッチ５６を設けたが、筐体の側面側、上面側または背面側に設けるようにしてもよい。また、図４（ｂ）に示すように、切替スイッチ５６が設けられているコントローラ２０の筐体の凹部を蓋やシール等で覆って隠してもよい。その場合には筐体の正面側に切替スイッチ５６を設けるようにしてもよい。また、コントローラ２０の筐体の内部に完全に切替スイッチ５６を隠すように設けて、筐体を開けないと切替スイッチ５６を操作できないようにしてもよい。 Further, as shown in FIG. 4B, the changeover switch 56 is installed in a recess provided on the lower surface side of the housing of the controller 20 so as not to protrude from the lower surface of the housing of the controller 20. As shown in FIG. 4A, the changeover switch 56 is hidden and invisible from the front side of the housing of the controller 20 provided with the display unit 24 and the operation unit 25 of the manual control means 23. ing. Therefore, even when the administrator or the like operates the manual control means 23, it is difficult for the administrator or the like to notice the existence of the changeover switch 56, and the changeover switch 56 is not operated unnecessarily. Here, the changeover switch 56 is provided on the lower surface side of the housing of the controller 20, but it may be provided on the side surface side, the upper surface side, or the back surface side of the housing. Further, as shown in FIG. 4B, the concave portion of the housing of the controller 20 provided with the changeover switch 56 may be covered with a lid, a sticker, or the like to hide it. In that case, the changeover switch 56 may be provided on the front side of the housing. Further, the changeover switch 56 may be provided so as to be completely hidden inside the housing of the controller 20 so that the changeover switch 56 cannot be operated unless the housing is opened.

それに対して、強制運転スイッチ５１及び強制運転スイッチ５２は、図４（ａ）に示すように、コントローラ２０の筐体の正面側に露出して設けられている。強制運転スイッチ５１及び強制運転スイッチ５２は、コントローラ２０の故障時等に、管理者等が操作するスイッチなので、コントローラ２０の正面側の管理者等に分かりやすい箇所に設置されることが好ましい。図４（ａ）では、強制運転スイッチ５１及び強制運転スイッチ５２が、手動制御手段２３の操作部２５の下隣りに設けられているので、慣れていない管理者等でも、手動制御手段２３による手動制御ができないと分かると、強制運転スイッチ５１及び強制運転スイッチ５２が設けられている場所を探すことなく、すぐに強制運転を行うことができる。 On the other hand, as shown in FIG. 4A, the forced operation switch 51 and the forced operation switch 52 are provided so as to be exposed on the front side of the housing of the controller 20. Since the forced operation switch 51 and the forced operation switch 52 are switches operated by an administrator or the like in the event of a failure of the controller 20, it is preferable that the forced operation switch 51 and the forced operation switch 52 be installed at a location easily understood by the administrator or the like on the front side of the controller 20. In FIG. 4A, since the forced operation switch 51 and the forced operation switch 52 are provided below the operation unit 25 of the manual control means 23, even an unfamiliar administrator or the like can manually use the manual control means 23. If it is found that the control cannot be performed, the forced operation can be performed immediately without searching for the place where the forced operation switch 51 and the forced operation switch 52 are provided.

通常は、マンホールポンプ施設２の運転方式は設計時に決定されてその後変更されることはないが、例えば、単独交互運転方式を採用していたマンホールポンプ施設２において、当初予定していた計画流入量よりも、実際の流入量が多くなってしまい、後から並列運転方式に切り替えたいような場合がある。そのような場合でも、本実施形態に係る切替回路１によると、切替スイッチ５６を操作するだけで単独運転回路６７と並列運転回路６８とを切り替えることができるので、制御盤７を交換せずに済ませたり、最低限の機器の交換で済ませることができる。 Normally, the operation method of the manhole pump facility 2 is determined at the time of design and is not changed thereafter. However, for example, in the manhole pump facility 2 that has adopted the single alternating operation method, the originally planned inflow amount In some cases, the actual inflow amount becomes larger than that, and it is desired to switch to the parallel operation method later. Even in such a case, according to the changeover circuit 1 according to the present embodiment, the independent operation circuit 67 and the parallel operation circuit 68 can be switched by simply operating the changeover switch 56, so that the control panel 7 is not replaced. It can be done or the minimum equipment replacement is required.

以下では、制御盤７の筐体７１の底板部分について説明する。図２に示すように、制御盤７の筐体７１は、前面が開口した箱形となっており、筐体７１内に各種機器が収められている。本実施形態では、筐体７１の底板部分は、筐体本体７３に対して、一体型底板８０が取り付けられることによって構成される。 Hereinafter, the bottom plate portion of the housing 71 of the control panel 7 will be described. As shown in FIG. 2, the housing 71 of the control panel 7 has a box shape with an open front surface, and various devices are housed in the housing 71. In the present embodiment, the bottom plate portion of the housing 71 is configured by attaching the integrated bottom plate 80 to the housing body 73.

筐体本体７３は、図６（ａ）に示すように、矩形板状の筐体背面部７４と、筐体背面部７４の両側辺からそれぞれ略垂直に前側に延出する筐体側面部７５とを備え、２つの筐体側面部７５の前側延出端辺からは、それぞれ筐体側面部７５に略垂直に互いに近接する方向に前面鍔部７６が延出しており、２つの前面鍔部７６の延出端辺が筐体７１の前面の開口の側端を形成している。筐体本体７３の底面側は開口しており、筐体背面部７４の底面側端辺からは筐体背面部７４に略垂直に前側に向かって底面背面側鍔部７７が延出し、２つの筐体側面部７５の底面側端辺からはそれぞれ筐体側面部７５に略垂直に互いに近接する方向に底面側面側鍔部７８が延出している。底面背面側鍔部７７及び底面側面側鍔部７８の延出長さは、それぞれ前面鍔部７６の延出長さと略等しくなっている。また、２つの底面側面側鍔部７８は、それぞれ前面鍔部７６側の端部に、薄板１枚程度を嵌挿可能なスリット部７９が設けられている。 As shown in FIG. 6A, the housing body 73 has a rectangular plate-shaped housing back surface portion 74 and a housing side surface portion 75 extending substantially vertically from both sides of the housing back surface portion 74 to the front side. From the front extending end sides of the two housing side surfaces 75, the front flange portion 76 extends in a direction substantially perpendicular to the housing side surface portion 75 and is close to each other, and the two front flange portions are provided. The extending end side of 76 forms the side end of the opening on the front surface of the housing 71. The bottom surface side of the housing body 73 is open, and the bottom surface rear side flange portion 77 extends substantially perpendicular to the housing back surface portion 74 from the bottom surface side end side of the housing back surface portion 74 toward the front side. From the bottom side end side of the housing side surface portion 75, the bottom surface side flange portion 78 extends in a direction substantially perpendicular to the housing side surface portion 75 and close to each other. The extension lengths of the bottom surface side flange portion 77 and the bottom surface side flange portion 78 are substantially equal to the extension length of the front flange portion 76, respectively. Further, each of the two bottom surface side flange portions 78 is provided with a slit portion 79 into which about one thin plate can be inserted at the end portion on the front flange portion 76 side.

一体型底板８０は、筐体本体７３の底面側の開口を塞ぐ矩形板状の底面部８１と、底面部８１の一辺から底面部８１に略垂直に延出する前壁部８２とを有する断面略Ｌ字形の部材となっている。底面部８１には、停電時の緊急電源のコードを通過させることができるようなコード用孔８３が設けられており、前壁部８２には、吸気のための複数の吸入孔８４が設けられている。 The integrated bottom plate 80 has a cross section having a rectangular plate-shaped bottom surface portion 81 that closes an opening on the bottom surface side of the housing body 73, and a front wall portion 82 that extends substantially vertically from one side of the bottom surface portion 81 to the bottom surface portion 81. It is a substantially L-shaped member. The bottom surface 81 is provided with a cord hole 83 for passing an emergency power cord in the event of a power failure, and the front wall 82 is provided with a plurality of suction holes 84 for intake air. ing.

前壁部８２の両側をそれぞれスリット部７９に差し込むようにして、一体型底板８０は筐体本体７３に取り付けられて、前壁部８２と前面鍔部７６と、並びに、底板部８１と底面背面側鍔部７７及び底面側面側鍔部７８とに、それぞれ対応する位置に設けられているボルト孔またはネジ孔を介して、ボルト及びナットまたはネジ等によって固定される。一体型底板８０が筐体本体７３に取り付けられることによって、図６（ｂ）に示すように、底板部８０が筐体本体７３の底面側の開口を塞ぎ、前壁部８２の延出端辺が筐体７１の前面の開口の下端を形成する。 The integrated bottom plate 80 is attached to the housing body 73 so that both sides of the front wall portion 82 are inserted into the slit portions 79, and the front wall portion 82 and the front flange portion 76, as well as the bottom plate portion 81 and the back surface of the bottom surface are attached. It is fixed to the side flange portion 77 and the bottom surface side flange portion 78 by bolts, nuts, screws, or the like via bolt holes or screw holes provided at corresponding positions. By attaching the integrated bottom plate 80 to the housing body 73, as shown in FIG. 6B, the bottom plate 80 closes the opening on the bottom surface side of the housing body 73, and the extending end side of the front wall portion 82. Form the lower end of the opening on the front surface of the housing 71.

一体型底板８０には、図６（ａ）に示すように、メッシュ部材８５と、スペースヒーター取付金物８６が取り付けられる。スペースヒーター取付金物８６には、前壁部８２に設けられた吸入孔８４に対応した数と位置に金物側吸入孔８７が設けられている。スペースヒーター取付金物８６の金物側吸入孔８７を、前壁部８２の吸入孔８４の位置に合わせたときに、前壁部８２の両端部に設けられたボルト孔またはネジ孔に対応する位置に、スペースヒーター取付金物８６の両端部にもボルト孔またはネジ孔が設けられている。 As shown in FIG. 6A, the mesh member 85 and the space heater mounting hardware 86 are attached to the integrated bottom plate 80. The space heater mounting hardware 86 is provided with metal side suction holes 87 at a number and positions corresponding to the suction holes 84 provided in the front wall portion 82. When the metal side suction hole 87 of the space heater mounting hardware 86 is aligned with the position of the suction hole 84 of the front wall portion 82, it is positioned at a position corresponding to the bolt holes or screw holes provided at both ends of the front wall portion 82. , Both ends of the space heater mounting hardware 86 are also provided with bolt holes or screw holes.

スペースヒーター取付金物８６にスペースヒーター８８を取り付けた後、メッシュ部材８５をスペースヒーター取付金物８６と前壁部８２との間に挟むようにして、金物側吸入孔８７と吸入孔８４との位置を合わせてスペースヒーター取付金物８６を一体型底板８０の前壁部８２の内側に当接させるようにする。そして、一体型底板８０を筐体本体７３に取り付けて、前面鍔部７６、前壁部８２及びスペースヒーター取付金物８６をボルト及びナットまたはネジ等によって共締めにすることで、スペースヒーター取付金物８６は一体型底板８０に取り付けられる。 After attaching the space heater 88 to the space heater mounting hardware 86, the mesh member 85 is sandwiched between the space heater mounting hardware 86 and the front wall portion 82 so that the positions of the metal side suction hole 87 and the suction hole 84 are aligned. The space heater mounting hardware 86 is brought into contact with the inside of the front wall portion 82 of the integrated bottom plate 80. Then, the integrated bottom plate 80 is attached to the housing body 73, and the front flange portion 76, the front wall portion 82, and the space heater mounting hardware 86 are jointly tightened with bolts, nuts, screws, or the like, whereby the space heater mounting hardware 86 is used. Is attached to the integrated bottom plate 80.

メッシュ部材８５は、図６（ｂ）に示すように、吸入孔８４を塞ぐようにして設けられ、吸入孔８４及び金物側吸入孔８７を介した制御盤７の内外の通気は、メッシュ部材８５を通して行われるので、メッシュ部材８５によって制御盤７の外側のゴミ等が制御盤７の内側へ入り込むことが防がれる。また、吸入孔８７の近くにはスペースヒーター８８が設けられているため、スペースヒーター８８によって、寒冷地等でも吸入孔８７から吸入される空気を温めて制御盤７内を適性温度に保温することができる。 As shown in FIG. 6B, the mesh member 85 is provided so as to close the suction hole 84, and the ventilation inside and outside the control panel 7 through the suction hole 84 and the metal side suction hole 87 is the mesh member 85. The mesh member 85 prevents dust and the like on the outside of the control panel 7 from entering the inside of the control panel 7. Further, since the space heater 88 is provided near the suction hole 87, the space heater 88 warms the air sucked from the suction hole 87 even in a cold region or the like to keep the inside of the control panel 7 at an appropriate temperature. Can be done.

以上のように、本実施形態に係る制御盤７の筐体７１は、筐体本体７３に取り付けられる底板を、底板部８１と前壁部８２とが一体となった一体型底板８０としているので、部材構成も少なく、また、筐体本体７３のスリット部７９に一体型底板８０の前壁部８２を差し込んでボルト及びナットまたはネジ等で固定するだけで取り付けられるので、取り付けも簡単であり、また、メッシュ部材８５も一体型底板８０の前壁部８２とスペースヒーター取付金物８６とで挟んで取り付けられるので、取り付けが簡単である。 As described above, in the housing 71 of the control panel 7 according to the present embodiment, the bottom plate attached to the housing body 73 is an integrated bottom plate 80 in which the bottom plate portion 81 and the front wall portion 82 are integrated. The number of members is small, and the front wall portion 82 of the integrated bottom plate 80 is simply inserted into the slit portion 79 of the housing body 73 and fixed with bolts and nuts or screws, so that the installation is easy. Further, since the mesh member 85 is also attached by being sandwiched between the front wall portion 82 of the integrated bottom plate 80 and the space heater mounting hardware 86, the attachment is easy.

上記の実施形態では、汚水を処理するマンホールポンプ施設２に備えられた第１ポンプ４及び第２ポンプ５の運転を制御する切替回路１について記載したが、本発明に係る切替回路は、それ以外の浄水処理施設、下水処理施設、中継ポンプ施設等の２台のポンプを有する水処理施設にも適用できる。また、水処理施設のみならず、他の分野の２台の電動機の運転を制御する回路にも応用できる可能性がある。 In the above embodiment, the switching circuit 1 for controlling the operation of the first pump 4 and the second pump 5 provided in the manhole pump facility 2 for treating sewage has been described, but the switching circuit according to the present invention is other than that. It can also be applied to water treatment facilities having two pumps, such as a water purification facility, a sewage treatment facility, and a relay pump facility. It may also be applied not only to water treatment facilities but also to circuits that control the operation of two electric motors in other fields.

１ 切替回路
２ マンホールポンプ施設
３ マンホール
４ 第１ポンプ（第１電動機）
５ 第２ポンプ（第２電動機）
６ 計測装置
７ 制御盤
１０ 電源部
１１ 第１主回路
１２ 第２主回路
１３ 制御回路
１４ 第１漏電遮断器
１５ 第２漏電遮断器
１６ 制御用漏電遮断器
１７ 第１コントローラ回路
１８ 第２コントローラ回路
２０ コントローラ
２１ 制御部
２２ 自動制御手段
２３ 手動制御手段
２４ 表示部
２５ 操作部
３０ 第１電磁開閉器
３１ 第１電磁接触器
３２ 第１コイル
３３ 第１主接点
３４ 第１補助接点
３６ 第１サーマルリレー
３７ 第１ヒーター
３８ 第１サーマル接点
４０ 第２電磁開閉器
４１ 第２電磁接触器
４２ 第２コイル
４３ 第２主接点
４４ 第２補助接点
４６ 第２サーマルリレー
４７ 第２ヒーター
４８ 第２サーマル接点
５１ 第１強制運転スイッチ
５２ 第２強制運転スイッチ
５６ 切替スイッチ
５７ 第１切替スイッチ
５８ 第２切替スイッチ
６１ 第１制御回路
６２ 第２制御回路
６３ 第１インターロック回路
６４ 第２インターロック回路
６５ 第１迂回回路
６６ 第２迂回回路
６７ 単独運転回路
６８ 並列運転回路
７１ 筐体
７２ 扉
７３ 筐体本体
７４ 筐体背面
７５ 筐体側面
７６ 前面鍔部
７７ 底面背面側鍔部
７８ 底面側面側鍔部
７９ スリット部
８０ 一体型底板
８１ 底面部
８２ 前壁部
８３ コード用孔
８４ 吸入孔
８５ スペースヒーター取付金物
８６ 金物側吸入孔
８７ スペースヒーター
８８ メッシュ部材 1 Switching circuit 2 Manhole pump facility 3 Manhole 4 1st pump (1st electric motor)
5 2nd pump (2nd electric motor)
6 Measuring device 7 Control panel 10 Power supply unit 11 1st main circuit 12 2nd main circuit 13 Control circuit 14 1st earth leakage breaker 15 2nd earth leakage breaker 16 Control earth leakage breaker 17 1st controller circuit 18 2nd controller circuit 20 Controller 21 Control unit 22 Automatic control means 23 Manual control means 24 Display unit 25 Operation unit 30 1st electromagnetic switch 31 1st electromagnetic switch 32 1st coil 33 1st main contact 34 1st auxiliary contact 36 1st thermal relay 37 1st heater 38 1st thermal contact 40 2nd electromagnetic switch 41 2nd electromagnetic contact 42 2nd coil 43 2nd main contact 44 2nd auxiliary contact 46 2nd thermal relay 47 2nd heater 48 2nd thermal contact 51 1st forced operation switch 52 2nd forced operation switch 56 Changeover switch 57 1st changeover switch 58 2nd changeover switch 61 1st control circuit 62 2nd control circuit 63 1st interlock circuit 64 2nd interlock circuit 65 1st detour Circuit 66 Second detour circuit 67 Independent operation circuit 68 Parallel operation circuit 71 Housing 72 Door 73 Housing body 74 Housing back 75 Housing side 76 Front flange 77 Bottom rear side flange 78 Bottom side flange 79 Slit 80 Integrated bottom plate 81 Bottom part 82 Front wall part 83 Cord hole 84 Suction hole 85 Space heater mounting hardware 86 Hardware side suction hole 87 Space heater 88 Mesh member

Claims (3)

第１コイルと、前記第１コイルの通電状態に応じて連動して動作する第１主接点及び第１補助接点とを有する第１電磁接触器と、
第２コイルと、前記第２コイルの通電状態に応じて連動して動作する第２主接点及び第２補助接点とを有する第２電磁接触器と、
回路の開閉を行う第１強制運転スイッチと、
回路の開閉を行う第２強制運転スイッチと、
２つの回路を切り替える第１切替スイッチと、
２つの回路を切り替える第２切替スイッチと、
を備え、
前記第１切替スイッチと前記第２補助接点と前記第１強制運転スイッチと前記第１コイルとを有し、第１電動機に電力を供給する第１主回路に設けられた前記第１主接点の開閉を制御する第１制御回路と、
前記第２切替スイッチと前記第１補助接点と前記第２強制運転スイッチと前記第２コイルとを有し、第２電動機に電力を供給する第２主回路に設けられた前記第２主接点の開閉を制御する第２制御回路と、
が設けられ、
前記第１制御回路は、前記第１切替スイッチによって、前記第２補助接点と前記第１強制運転スイッチと前記第１コイルとが直列に接続された第１インターロック回路と、前記第２補助接点を迂回して前記第１強制運転スイッチと前記第１コイルとが直列に接続された第１迂回回路とを切り替え可能となっており、
前記第２制御回路は、前記第２切替スイッチによって、前記第１補助接点と前記第２強制運転スイッチと前記第２コイルとが直列に接続された第２インターロック回路と、前記第１補助接点を迂回して前記第２強制運転スイッチと前記第２コイルとが直列に接続された第２迂回回路とを切り替え可能となっており、
前記第１主接点は、常開接点で前記第１コイルの通電時のみ閉となり、
前記第１補助接点は、常閉接点で前記第１コイルの通電時のみ開となり、
前記第２主接点は、常開接点で前記第２コイルの通電時のみ閉となり、
前記第２補助接点は、常閉接点で前記第２コイルの通電時のみ開となり、
前記第１切替スイッチ及び前記第２切替スイッチは、連動して動作し、前記第１制御回路が前記第１インターロック回路かつ前記第２制御回路が前記第２インターロック回路に切り替えられた状態と、前記第１制御回路が前記第１迂回回路かつ前記第２制御回路が前記第２迂回回路に切り替えられた状態とを切り替えることを特徴とする切替回路。
A first electromagnetic contactor having a first coil and a first main contact and a first auxiliary contact that operate in conjunction with each other according to the energized state of the first coil.
A second electromagnetic contactor having a second coil and a second main contact and a second auxiliary contact that operate in conjunction with each other according to the energized state of the second coil.
The first forced operation switch that opens and closes the circuit,
The second forced operation switch that opens and closes the circuit,
The first changeover switch that switches between the two circuits,
A second changeover switch that switches between two circuits,
With
The first main contact provided in the first main circuit having the first changeover switch, the second auxiliary contact, the first forced operation switch, and the first coil and supplying electric power to the first electric motor. The first control circuit that controls opening and closing,
A second main contact provided in a second main circuit having the second changeover switch, the first auxiliary contact, the second forced operation switch, and the second coil and supplying electric power to the second electric motor. A second control circuit that controls opening and closing,
Is provided,
The first control circuit includes a first interlock circuit in which the second auxiliary contact, the first forced operation switch, and the first coil are connected in series by the first changeover switch, and the second auxiliary contact. It is possible to switch between the first forced operation switch and the first detour circuit in which the first coil is connected in series by bypassing.
The second control circuit includes a second interlock circuit in which the first auxiliary contact, the second forced operation switch, and the second coil are connected in series by the second changeover switch, and the first auxiliary contact. It is possible to switch between the second forced operation switch and the second bypass circuit in which the second coil is connected in series by bypassing.
The first main contact is a normally open contact and is closed only when the first coil is energized.
The first auxiliary contact is a normally closed contact and is open only when the first coil is energized.
The second main contact is a normally open contact and is closed only when the second coil is energized.
The second auxiliary contact is a normally closed contact and is open only when the second coil is energized.
The first changeover switch and the second changeover switch operate in conjunction with each other, and a state in which the first control circuit is switched to the first interlock circuit and the second control circuit is switched to the second interlock circuit. A switching circuit characterized in that the first control circuit switches between the first detour circuit and the second control circuit is switched to the second detour circuit.
 前記第１切替スイッチ及び前記第２切替スイッチが、前記第１電動機及び前記第２電動機の運転を制御するコントローラの内部に隠されて設けられていることを特徴とする請求項１に記載の切替回路。
The changeover according to claim 1, wherein the first changeover switch and the second changeover switch are hidden inside a controller that controls the operation of the first electric motor and the second electric motor. circuit.
 前記第１強制運転スイッチ及び前記第２強制運転スイッチが、前記コントローラに設けられていることを特徴とする請求項２に記載の切替回路。 The changeover circuit according to claim 2, wherein the first forced operation switch and the second forced operation switch are provided in the controller.
JP2019167691A 2019-09-13 2019-09-13 Changeover circuit Pending JP2021045028A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53103513U (en) * 1977-01-26 1978-08-21
JPS63302283A (en) * 1987-05-29 1988-12-09 井関農機株式会社 Motor controller in cereal drier
JPS6471398A (en) * 1987-09-11 1989-03-16 Matsushita Seiko Kk Method for operating air conditioner
JPH10176870A (en) * 1996-12-13 1998-06-30 Hitachi Ltd Absorption cold and hot water apparatus system and operation control method therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53103513U (en) * 1977-01-26 1978-08-21
JPS63302283A (en) * 1987-05-29 1988-12-09 井関農機株式会社 Motor controller in cereal drier
JPS6471398A (en) * 1987-09-11 1989-03-16 Matsushita Seiko Kk Method for operating air conditioner
JPH10176870A (en) * 1996-12-13 1998-06-30 Hitachi Ltd Absorption cold and hot water apparatus system and operation control method therefor

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