A strong and weak electricity isolation control device for a submarine

Abstract

The application discloses a strong-weak electricity isolation control device for a submarine, which comprises a centralized control console, an isolation relay box and a pump group starter; the centralized control console is provided with a weak electricity control power supply, control buttons and a first indicator lamp; the isolation relay box is provided with a second indicator lamp, a diode and a first relay; the pump group starter is provided with a strong electricity control power supply, a second relay and a pump body; the coil of the first relay is connected with the weak electricity control power supply through the control buttons; the diode and the second indicator lamp are both connected in parallel to the two ends of the coil of the first relay, wherein the anode of the diode is connected with the negative pole of the weak electricity control power supply, and the cathode of the diode is connected with the positive pole of the weak electricity control power supply; the contact of the first relay and the coil of the second relay are connected in series to the two ends of the strong electricity control power supply; and the contact of the second relay is connected with the weak electricity control power supply through the first indicator lamp.

Description

Technical Field

[0001] The present invention relates to the field of ship electrical control, and in particular to a strong and weak electricity isolation control device for submarines. Background Art

[0002] Submarines are equipped with a centralized control console for centralized control of the submersible's equalization system pumps. This system includes pumps such as drain pumps for filling and draining tanks to maintain gravity and buoyancy balance, and bilge pumps for draining the submersible's compartments. The central console's telecontrol signal is typically a DC 24V signal, while the equalization system's pump main circuit operates at DC 350V to 640V. This mismatch between the two signals prevents direct control.

[0003] If the centralized control console matches the DC 350V~640V voltage, it will conflict with the safety principle of "strong current and weak current isolation design"; if the DC 24V voltage is matched in the pump group starter, the starter needs to be improved, which conflicts with the starter being a selected product. Summary of the Invention

[0004] The purpose of the present invention is to provide a strong and weak current isolation control device for submarines, so that the voltage of the centralized control console control signal matches the voltage of the pump group starter control circuit, and isolates the strong current and the weak current.

[0005] To solve the above technical problems, the present invention provides a technical solution: a strong and weak current isolation control device for submarines, comprising a centralized control console, an isolation relay box and a pump group starter; the centralized control console is provided with a weak current control power supply, a control button and a first indicator light, the isolation relay box is provided with a second indicator light, a diode and a first relay, and the pump group starter is provided with a strong current control power supply, a second relay and a pump body; the coil of the first relay is connected to the weak current control power supply through the control button, and the diode and the second indicator light are both connected in parallel to the two ends of the coil of the first relay, wherein the positive pole of the diode is connected to the negative pole of the weak current control power supply, and the negative pole of the diode is connected to the positive pole of the weak current control power supply; the contacts of the first relay are connected in series with the pump body and the coil of the second relay at the two ends of the strong current control power supply; the contacts of the second relay are connected to the weak current control power supply through the first indicator light.

[0006] According to the above scheme, the weak current control power supply is DC 24V, and the strong current control power supply is DC 350~640V.

[0007] According to the above scheme, the first relay is a DC 24V electromagnetic relay, and the second relay is a DC 350~640V electromagnetic relay.

[0008] According to the above scheme, the terminal array for connecting the electronic components is arranged in the centralized control console, the isolation relay box and the pump group starter.

[0009] The beneficial effects of the present application are:

[0010] 1. The relay is used as the core device for control signal conversion and voltage matching, and the weak control signal of the centralized control console is converted into the strong electric starting signal of the pump group; the relay comprises two loops, an input loop and an output loop, which are mainly composed of a core, a coil and a contact; the coil of the electromagnetic relay generates electromagnetic force after being electrified, and the electromagnetic force makes the moving contact and the static contact attract each other; after the coil loses electricity, the moving contact and the static contact will be released to the original position. In the process of attraction and release of the moving contact and the static contact, the current of the output loop will also be opened and closed, thereby realizing the function of controlling a large current with a small current. Since the electromagnetic relay realizes the on-off control of the current by electromagnetic force, the input and output loops are not electrically connected, and electrical isolation is realized.

[0011] 2. The coil of the first relay is reversely connected in parallel with a diode at the front end, which can provide a freewheeling circuit for the reverse electromotive force of the coil when the control signal is disconnected, prevents the coil of the first relay from being broken down by the reverse electromotive force, and improves the reliability of the equipment.

[0012] 3. The indicator lamp display circuit is arranged to display the working state, which is convenient for the operator to observe, equipment debugging and fault checking. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a strong and weak electric isolation control device circuit schematic diagram for a submarine according to an embodiment of the present application;

[0014] Figure 2 is a strong and weak electric isolation control device connection relationship schematic diagram for a submarine according to an embodiment of the present application;

[0015] Figure 3 is a front view of the isolation relay box according to an embodiment of the present application;

[0016] Figure 4 is a side sectional view of the isolation relay box according to an embodiment of the present application;

[0017] Figure 5 is a bottom view of the isolation relay box according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] To make the purposes, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.

[0019] As shown in Figure 2 , the isolation relay box is mainly used for connecting the centralized control console and the pump group starter, and is used for conversion and matching of control signals between the centralized control console and the pump group starter. One isolation relay box can connect two pump group starters.

[0020] As shown in Figure 1 , main components of the isolation relay box include a DC 24V / DC 350V-640V relay J1, a diode, a 24V indicator lamp, and a terminal strip. The centralized control console is provided with a control button and a working state indicator lamp, and the pump group starter is provided with a relay K1.

[0021] When the button on the centralized control console is pressed, the DC 24V control power supply is turned on, the coil of the relay J1 is powered, and the contact J1 of the relay J1 is attracted. At this time, the DC 350V-640V loop is connected, the relay K1 is powered, the main contact of the relay is attracted, and the pump group starts to work. The normally open auxiliary contact K1 of the relay is attracted, at this time, the state feedback loop is connected, the working indicator lamp of the centralized control console is lit, and it is displayed that the pump group is working.

[0022] When the button on the centralized control console is released, the DC 24V control power supply is turned off, the coil of the relay J1 is de-energized, and the contact J1 of the relay J1 is disconnected. At this time, the DC 350V-640V loop is disconnected, the relay K1 is de-energized, the main contact of the relay is disconnected, and the pump group stops working. The normally open auxiliary contact K1 of the relay is disconnected, at this time, the state feedback loop is disconnected, the working indicator lamp of the centralized control console is extinguished, and it is displayed that the pump group stops working.

[0023] When the DC 24V control power supply is turned off, the coil of the relay J1 will generate a reverse electromotive force applied to the control loop power supply and components. This voltage is high, and long-term and frequent overvoltage will damage the components. At this time, the diode can connect the reverse electromotive force to form a loop to consume it, thereby ensuring the safety of the components.

[0024] As shown in Figures 3-5 , the isolation relay box body is composed of sheet metal parts and is welded to ensure the strength of the box body. The structural parts are connected by screws to ensure the connection strength. The bottom wire inlet interface adopts a packing gland form to ensure the sealing and fixation of the cable. The terminal strip is fixed in the middle of the box bottom. The device has small volume and light weight, and is suitable for conventional submarine environments.

[0025] The technical points of the embodiment are as follows:

[0026] 1) Select DC 24V / DC 350V~640V relay

[0027] The isolation relay box adopts DC 24V / DC 350V~640V electromagnetic relay as the core device for control signal conversion and voltage matching. The relay converts the DC 24V control signal of the centralized control console into the DC 350V~640V starting signal of the pump group. The relay includes two circuits, an input circuit and an output circuit, which are mainly composed of a core, a coil and a contact. After the coil of the electromagnetic relay is powered on, an electromagnetic force is generated, which causes the dynamic contact and the static contact to attract each other. After the coil loses power, the dynamic contact and the static contact will release to the original position. In the process of attraction and release of the dynamic and static contacts, the current of the output circuit will also be turned on and off, thereby realizing the function of controlling a larger current with a smaller current. Since the electromagnetic relay controls the on-off of the current by electromagnetic force, the input and output circuits are not electrically connected, and electrical isolation is achieved.

[0028] 2) Set a freewheeling protection circuit

[0029] The DC 24V / DC 350V~640V relay coil of the isolation relay box is connected in reverse parallel with a diode at the front end, which is used to provide freewheeling for the relay coil when the control signal is turned off, preventing the relay coil from being broken down by reverse high voltage when the coil is suddenly powered off, and increasing the safety and reliability of the equipment.

[0030] 3) Set a working indicator light

[0031] A DC 24V indicator light is connected in parallel with the DC 24V coil at the front end of the isolation relay box, and the indicator light is installed on the panel of the isolation relay box. When the control signal is turned on, the indicator light is on, which is convenient for the operator to observe; when the equipment fails, this indicator light can be used for debugging and troubleshooting of the isolation relay box.

[0032] 4) Adopt a jog control mode

[0033] Considering the tight panel layout of the centralized control console and the actual use requirements of the pump group, the control of the pump group adopts a jog control mode. Compared with the continuous control mode, the jog control mode can save one control button; at the same time, the jog control can quickly switch the state of the pump group according to the intention of the operator, which is conducive to accurate control of the flow of the pump group. Therefore, the relay circuit of the isolation relay box does not set a self-holding circuit.

[0034] When the control mode is set to "remote control" on the starter, the pump group is powered on and starts working when the start button of the centralized console is pressed; the pump group is powered off and stops working when the start button of the centralized console is released.

[0035] 5) Set the running state indicator

[0036] When the control mode is set to "remote control" on the starter, the isolation relay control circuit is connected, and when the centralized console sends a start signal, the DC 350V-640V relay coil K1 is powered on, which drives the main contact of the starter power supply circuit to connect the power supply to start the pump group. The auxiliary contact K1 of the relay is closed, which is connected to the centralized console through the transfer terminal of the isolation relay box, and the running indicator on the centralized console is lit to indicate the running state of the pump group.

[0037] The submarine isolation relay box uses a DC 24V / DC 350V-640V relay to convert a DC 24V control signal into a DC 350V-640V start signal for the pump group, has a working indicator, a jog working mode, and a relay with a diode to protect the low-voltage circuit, and has good reliability and safety.

[0038] The beneficial effects of the embodiment are as follows:

[0039] 1) The use of a DC 24V / DC 350V-640V relay can control the high-voltage circuit through the low-voltage circuit to realize the matching of control signals of different voltage levels, and the electrical isolation between the low-voltage and high-voltage circuits improves the electrical safety of the equipment;

[0040] 2) The DC 24V coil is connected in reverse parallel with a diode at the front end, which provides a freewheeling circuit for the reverse electromotive force of the coil when the control signal is disconnected, preventing the DC 24V coil from being punctured by the reverse electromotive force, and improving the reliability of the equipment;

[0041] 3) Considering the tight panel layout of the centralized console and the actual use requirements of the pump group, the jog control mode is adopted, which is beneficial to the accurate control of the pump group flow;

[0042] 4) The working indicator is provided on the box, which can indicate the working state of the isolation relay box at the machine; the working state transfer terminal is provided inside the box, which can indicate the working state of the pump group at the centralized console; this design has good maintainability, which is convenient for operators to observe, equipment debugging and fault troubleshooting, and has good human-machine interaction.

[0043] The above merely illustrates the embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, which is made according to the content of the present application, shall be included in the patent protection scope of the present application.

Claims

1. A strong and weak current isolation control device for submarines, characterized by: It includes a centralized control console, an isolation relay box and a pump group starter; the centralized control console is provided with a weak-current control power supply, a control button and a first indicator light, the isolation relay box is provided with a second indicator light, a diode and a first relay, and the pump group starter is provided with a strong-current control power supply, a second relay and a pump body; the coil of the first relay is connected to the weak-current control power supply through the control button, and the diode and the second indicator light are both connected in parallel to the two ends of the coil of the first relay, wherein the positive pole of the diode is connected to the negative pole of the weak-current control power supply, and the negative pole of the diode is connected to the positive pole of the weak-current control power supply; the contacts of the first relay are connected in series with the pump body and the coil of the second relay at both ends of the strong-current control power supply; the contacts of the second relay are connected to the weak-current control power supply through the first indicator light.

2. The strong and weak current isolation control device for submarines according to claim 1, characterized in that: The weak current control power supply is DC 24V, and the strong current control power supply is DC 350~640V.

3. The strong and weak current isolation control device for submarines according to claim 2, characterized in that: The first relay is a DC 24V electromagnetic relay, and the second relay is a DC 350~640V electromagnetic relay.

4. The strong and weak current isolation control device for submarines according to claim 1, characterized in that: Terminal blocks for connecting various electronic components are provided in the centralized control console, isolation relay box and pump group starter.

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