A pump group switching control box

Abstract

The present invention discloses a pump group switching control box including a DC input terminal; an AC input terminal; a first contactor connected to the DC input terminal and connected in series with a first power pump and then connected to the AC input terminal; a second contactor connected in parallel with the first contactor and then connected to the DC input terminal and then connected in series with the second power pump and then connected to the AC input terminal; a first relay connected to the DC input terminal, a first contact of the first relay connected to a main contact of the first contactor, and a second contact of the first relay connected to a main contact of the second contactor; a CAN communication module electrically connected to the AC input terminal, a signal input terminal of the CAN communication module connected to a host computer for communication, and a signal output terminal of the CAN communication module connected to the first contactor and the second contactor for communication, respectively; and a switching relay, a first contact of the switching relay connected between the first relay and the DC input terminal. The pump group switching control box provided by the present invention improves the efficiency and safety of offshore operations.

Description

Technical Field

[0001] The present invention relates to the technical field of water pump control, and in particular to a pump group switching control circuit and a control box. Background Art

[0002] When carrying out offshore operations, if you encounter operations in the distant sea or dangerous sea areas or when you need to go out to sea in bad weather conditions, it is often necessary to dispatch unmanned ships to go out to sea while ensuring the safety of personnel.

[0003] However, due to the limitations of the control system of unmanned ships, only one power pump is often controlled on the ship for offshore operations. It is impossible to flexibly select pump groups to deal with complex situations like when going out to sea manually. In the event of an emergency or a situation where the pump group needs to be switched, the ship cannot switch the pump group according to different situations, which reduces the efficiency and safety of engineering operations.

[0004] Therefore, there is a need for a pump group switching control circuit that can automatically switch the working state of the pump group according to different situations, realize mutual cooperation between pump groups with different functions, and improve the efficiency and safety of offshore operations. Summary of the Invention

[0005] To solve the technical problem that conventional methods cannot flexibly select pump groups to cope with complex situations, and when encountering emergencies or situations where pump groups need to be switched, ships cannot switch pump groups according to different situations, resulting in reduced efficiency and safety during engineering operations, the present invention provides a pump group switching control circuit and control box. The specific technical solutions are as follows:

[0006] The present invention provides a pump group switching control box, which is electrically connected to a first power pump and a second power pump and is communicatively connected to a host computer, and includes a DC input terminal, an AC input terminal, a first contactor, a second contactor, a first relay, a CAN communication module and a switching relay.

[0007] The first contactor is connected to the DC input terminal, is connected in series with the first power pump, and is then connected to the AC input terminal;

[0008] A second contactor is connected to the first contactor in parallel and then connected to the DC input terminal, and is connected to the second power pump in series and then connected to the AC input terminal;

[0009] A first relay is connected to the DC input terminal, a first contact of the first relay is connected to a main contact of the first contactor, and a second contact of the first relay is connected to a main contact of the second contactor;

[0010] A CAN communication module is electrically connected to the AC input terminal, a signal input terminal of the CAN communication module is communicatively connected to the host computer, and a signal output terminal of the CAN communication module is communicatively connected to the first contactor and the second contactor respectively;

[0011] Switching Relay: The first contact of the switching relay is connected between the first relay and the DC input terminal.

[0012] The pump group switching control box provided by the present invention selects two control modes between CAN communication control and local control by switching relays. In the CAN communication control mode, the contacts of the first contactor or the second contactor are attracted by transmitting communication signals. In the local control mode, the contacts of the first contactor or the second contactor are attracted by transmitting electrical signals. The AC power supply is connected to the first power pump or the second power pump through the attracted contacts of the first contactor or the second contactor, thereby automatically switching the two working states of remote communication control and local control of the pump group according to different situations, realizing mutual cooperation between the first power pump and the second power pump, and improving the efficiency and safety of offshore operations.

[0013] Furthermore, the present invention also provides a pump group switching control box:

[0014] The first relay is in a first state, the first contact of the first relay is closed and connected to the first contactor, the first contactor is connected to the DC input terminal, the first contactor contact is adsorbed and closed, and the first power pump is connected to the AC input terminal through the closed first contactor;

[0015] The first relay is in the second state, the second contact of the first relay is closed and connected to the second contactor, the second contactor is connected to the DC input end, the second contactor contact is adsorbed and closed, and the second power pump is connected to the AC input end through the second contactor with closed contacts.

[0016] The pump group switching control box provided by the present invention has two operating states in local control mode. In each state, due to different closed first relay contacts, different contactors are connected to the circuit. In the first state, the first contactor is connected to the circuit to connect the first power pump to the AC terminal. In the second state, the second contactor is connected to the circuit to connect the second power pump to the AC terminal. The present invention achieves mutual cooperation between the first and second power pumps by different closed relay contact states, thereby improving the efficiency of offshore operations.

[0017] Furthermore, the present invention also provides a pump group switching control box:

[0018] The first relay is electrically connected to a liquid level sensing device provided on the first power pump;

[0019] When the liquid level sensing device detects that the liquid level of the first power pump is higher than or equal to a preset liquid level, the first contact of the first relay is closed and connected to the first contactor;

[0020] When the liquid level sensing device detects that the liquid level of the first power pump is lower than a preset liquid level, the second contact of the first relay is closed and connected to the second contactor.

[0021] The pump group switching control box provided by the present invention is connected to the liquid level sensing device arranged on the first power pump. In the local control mode, the contacts of the first relay are closed according to the liquid level switching in the first power pump, thereby realizing the switching of the working states between the first power pump and the second power pump according to the liquid level in the first power pump in the local control mode.

[0022] Furthermore, the present invention also provides a pump group switching control box, further comprising:

[0023] A first aerial plug assembly is connected to the AC input terminal for receiving AC power;

[0024] a second aerial plug assembly, connected to the first power pump, for outputting alternating current to the first power pump;

[0025] a third aerial plug assembly, connected to the second power pump, for outputting alternating current to the second power pump;

[0026] A fourth aerial plug assembly, connected to the host computer, for outputting a feedback signal;

[0027] The fifth aviation plug assembly is connected between the CAN communication module and the first contactor and the second contactor.

[0028] The pump group switching control box provided by the present invention provides multiple aviation plug components for the control box to access and output electrical signals and communication signals. The signals are transmitted by the aviation plug components to realize the switching of CAN communication control and local control, as well as the switching of the working states of the first power pump and the second power pump, thereby improving the safety of offshore operations.

[0029] Furthermore, the present invention also provides a pump group switching control box, further comprising:

[0030] a first push button switch connected between the DC input terminal and the first relay and connected in parallel with the conversion relay;

[0031] a second push button switch connected between the DC input terminal and the first relay and in parallel with the conversion relay;

[0032] The first button switch and the second button switch are both connected to the fourth aviation plug assembly.

[0033] The pump group switching control box provided by the present invention controls the opening and closing of CAN communication control and local control mode respectively through two button switches. The independent control of the two switches increases the safety of circuit control, and the opening and closing status of the CAN communication control and local control mode are fed back to the host computer through the fourth aviation plug component, intuitively displaying the opening and closing status of the CAN communication control and local control mode, thereby improving the safety of offshore operations.

[0034] Furthermore, the present invention also provides a pump group switching control box, further comprising:

[0035] an overload relay connected between the DC input terminal and the first relay;

[0036] an overheat relay, connected in series with the overload relay and connected between the DC input terminal and the first relay;

[0037] The second contact of the overload relay is connected in parallel with the second contact of the overheat relay and then connected in series with the buzzer to the DC input terminal;

[0038] The third contact of the overload relay is connected in parallel with the third contact of the overheat relay and is then connected to the fourth aviation plug assembly.

[0039] The pump group switching control box provided by the present invention responds to circuit overload and overheating conditions through an overload relay and an overheating relay, alarms when the circuit is overloaded and overheated through a comprehensive alarm buzzer, and feeds back the working conditions of the overload relay and the overheating relay to the host computer in real time through the fourth aviation plug-in component, thereby improving the safety of offshore operations.

[0040] Furthermore, the present invention also provides a pump group switching control box, further comprising:

[0041] a pulse relay, connected in series with the overload relay and connected between the DC input terminal and the overload relay;

[0042] A temperature relay is connected in series with the overheat relay and is connected between the DC input terminal and the overheat relay;

[0043] a first indicator light, connected in parallel with the overload relay and between the DC input terminal and the first relay;

[0044] The second indicator light is connected in parallel with the overheat relay and is connected between the DC input terminal and the first relay.

[0045] The pump group switching control box provided by the present invention controls the opening and closing of the overload relay and the overheat relay through the pulse relay and the temperature relay respectively, and installs indicator lights on the circuits of the pulse relay and the temperature relay respectively. The cause of the fault can be accurately identified according to the status of the indicator lights, thereby improving the maintenance efficiency when fault problems occur during offshore operations.

[0046] Furthermore, the present invention also provides a pump group switching control box:

[0047] The second contact of the conversion relay is connected between the third indicator light and the DC input terminal;

[0048] The third contact of the conversion relay is connected between the fourth indicator light and the DC input terminal;

[0049] The fourth contact of the conversion relay is connected to the fourth aviation plug component.

[0050] The pump group switching control box provided by the present invention is respectively connected to indicator lights in the circuits of the second contact and the third contact of the conversion relay. The working conditions of the indicator lights can intuitively reflect the working mode of the control box, and the working mode of the control box can be fed back to the host computer through the fourth aviation plug-in component.

[0051] Furthermore, the present invention also provides a pump group switching control box, further comprising:

[0052] a second relay, wherein a first contact of the second relay is connected between the DC input terminal and the first contactor;

[0053] The second contact of the second relay is connected to the fourth aviation plug component;

[0054] The third contact of the second relay is connected to the fourth aviation plug assembly.

[0055] The pump group switching control box provided by the present invention connects a second relay between the first contactor and the DC input terminal to control the working state of the first power pump, and feeds back the working state of the first power pump to the host computer through the fourth aviation plug-in component.

[0056] Furthermore, the present invention also provides a pump group switching control box, further comprising:

[0057] a fifth indicator light, connected between the DC input terminal and the first relay;

[0058] a sixth indicator light, connected in parallel with the first contactor and between the first contact of the first relay and the DC input terminal;

[0059] A seventh indicator light is connected in series with the second contactor and is connected between the second contact of the first relay and the DC input terminal.

[0060] The pump group switching control box provided by the present invention indicates the power supply status in the pump group switching control box through the working status of the fifth indicator light, indicates the connection status of the first contactor through the working status of the sixth indicator light, and indicates the connection status of the second contactor through the working status of the seventh indicator light.

[0061] The present invention provides a pump group switching control circuit and a control box, which have at least one of the following technical effects:

[0062] (1) Automatically switch between remote communication control and local control of the pump group according to different situations, realize mutual cooperation between the first power pump and the second power pump, and improve the efficiency and safety of offshore operations;

[0063] (2) By adjusting the closing states of the relay contacts, the first power pump and the second power pump can cooperate with each other, thereby improving the efficiency of offshore operations;

[0064] (3) connected to the liquid level sensing device provided in the first power pump, and in the local control mode, switching the contacts of the first relay closed according to the liquid level in the first power pump, so as to realize the switching of the working state between the first power pump and the second power pump according to the liquid level in the first power pump in the local control mode;

[0065] (4) Provide multiple aviation plug-in components for the control box to access and output electrical signals and communication signals. The aviation plug-in components transmit signals to realize the switching of the two control modes of CAN communication control and local control, as well as the switching of the working status of the first power pump and the second power pump, thereby improving the safety of offshore operations;

[0066] (5) The overload relay and overheat relay respond to the overload and overheat conditions of the circuit, and the integrated alarm buzzer alarms when the circuit is overloaded or overheated. The working conditions of the overload relay and overheat relay are fed back to the host computer through the fourth aviation plug-in component in real time, thereby improving the safety of offshore operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0068] Figure 1 This is a DC circuit structure diagram of a pump group switching control box of the present invention;

[0069] Figure 2 This is a structural diagram of the AC circuit of a pump group switching control box of the present invention. DETAILED DESCRIPTION

[0070] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known components, devices, circuits, and methods are omitted to avoid obstructing the description of the present application with unnecessary details.

[0071] It will be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integers, devices, states and / or components, but does not exclude the presence or addition of one or more other features, integers, devices, states, components and / or collections.

[0072] To simplify the drawings, only the parts relevant to the present invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. As used herein, "one" refers not only to "only one" but also to "more than one."

[0073] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0074] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0075] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0076] Example 1

[0077] One embodiment of the present invention, as Figure 1 、 2 As shown, the present invention provides a pump group switching control box, which is electrically connected to the first power pump M1 and the second power pump M2, and is communicatively connected to the host computer, including a DC input terminal, an AC input terminal, a first contactor 1KM, a second contactor 2KM, a first relay 5KA, a CAN communication module and a switching relay 2KA.

[0078] The first contactor 1KM is connected to the DC input terminal, is connected in series with the first power pump M1, and is then connected to the AC input terminal.

[0079] Specifically, when the main contact of the first contactor 1KM in the DC circuit is controlled by an electrical signal or a communication signal to be attracted and turned on, the first power pump M1, the first contactor 1KM and the AC input end in the AC circuit form a closed loop and are turned on, and the first power pump M1 operates under the action of AC power.

[0080] The second contactor 2KM is connected to the first contactor 1KM in parallel and then connected to the DC input terminal, and is connected to the second power pump M2 in series and then connected to the AC input terminal.

[0081] Specifically, when the main contact of the second contactor 2KM in the DC circuit is controlled by an electrical signal or a communication signal to be attracted and turned on, the second power pump M2, the second contactor 2KM and the AC input end in the AC circuit form a closed loop and are turned on, and the second power pump M2 operates under the action of AC power.

[0082] The first relay 5KA is connected to the DC input terminal, a first contact of the first relay 5KA is connected to the main contact of the first contactor 1KM, and a second contact of the first relay 5KA is connected to the main contact of the second contactor 2KM.

[0083] Specifically, the first relay 5KA is controlled by an electrical signal in the DC circuit. When the first contact of the first relay 5KA is closed, the main contact of the first contactor 1KM is attracted and turned on. When the second contact of the first relay 5KA is closed, the main contact of the second contactor 2KM is attracted and turned on.

[0084] The CAN communication module is electrically connected to the AC input terminal, the signal input terminal of the CAN communication module is communicatively connected to the host computer, and the signal output terminal of the CAN communication module is communicatively connected to the first contactor 1KM and the second contactor 2KM respectively.

[0085] Specifically, the CAN communication module sends a control signal to the first contactor 1KM and the second contactor 2KM according to the communication signal of the host computer, so as to control the main contact of the first contactor 1KM or the second contactor 2KM to be attracted and turned on.

[0086] The first contact of the changeover relay 2KA is connected between the first relay 5KA and the DC input terminal.

[0087] Specifically, when the first contact of the switching relay 2KA is closed, the first relay 5KA is connected to the DC input terminal, and the CAN communication module is disconnected from the AC input terminal. When the first contact of the switching relay 2KA is disconnected, the first relay 5KA is disconnected from the DC input terminal, and the CAN communication module is connected to the AC input terminal.

[0088] The pump group switching control box provided in this embodiment selects two control modes between CAN communication control and local control by switching relays. In the CAN communication control mode, the contacts of the first contactor or the second contactor are attracted by transmitting communication signals. In the local control mode, the contacts of the first contactor or the second contactor are attracted by transmitting electrical signals. The AC power supply is connected to the first power pump M1 or the second power pump M2 through the attracted contacts of the first contactor or the second contactor, thereby automatically switching the two working states of remote communication control and local control of the pump group according to different situations, realizing mutual cooperation between the first power pump M1 and the second power pump M2, and improving the efficiency and safety of offshore operations.

[0089] Example 2

[0090] Based on Example 1, Figure 1 As shown, in the pump group switching control box provided by the present invention:

[0091] The first relay 5KA is electrically connected to the liquid level sensing device provided on the first power pump M1.

[0092] Exemplarily, the liquid level sensing device includes a float disposed on the liquid surface of the first power pump M1 , and a first contact piece and a second contact piece disposed in the first power pump M1 .

[0093] When the pump group switching control box is in local control mode, when the liquid level sensing device detects that the liquid level of the first power pump M1 is higher than or equal to the preset liquid level, the float touches the first contact piece, so that the first contact of the first relay 5KA is closed and connected to the first contactor 1KM, the first relay 5KA is in the first state, the first contactor 1KM is connected to the DC input end, the first contactor 1KM contact is adsorbed and closed, and the first power pump M1 is connected to the AC input end through the closed contact of the first contactor 1KM.

[0094] When the liquid level sensing device detects that the liquid level of the first power pump M1 is lower than the preset liquid level, the second contact of the first relay 5KA is closed and connected to the second contactor 2KM. The first relay 5KA is in the second state, the second contactor 2KM is connected to the DC input end, the second contactor 2KM contact is adsorbed and closed, and the second power pump M2 is connected to the AC input end through the second contactor 2KM with closed contacts.

[0095] The pump group switching control box also includes a first push button switch 1SB and a second push button switch 2SB.

[0096] The first push button switch 1SB is connected between the DC input terminal and the first relay 5KA, and is connected in parallel with the change-over relay 2KA.

[0097] The second push button switch 2SB is connected between the DC input terminal and the first relay 5KA, and is connected in parallel with the change-over relay 2KA.

[0098] The pump group switching control box provided in this embodiment is connected to the liquid level sensing device provided on the first power pump. In the local control mode, the closed contacts of the first relay are switched according to the liquid level in the first power pump, thereby realizing the switching of the working state between the first power pump and the second power pump according to the liquid level in the first power pump in the local control mode. In each state, due to the different closed contacts of the first relay, the contactors connected to the circuit are also different. In the first state, the first contactor is connected to the circuit to connect the first power pump to the AC end. In the second state, the second contactor is connected to the circuit to connect the second power pump to the AC end. The present invention realizes the mutual cooperation between the first power pump and the second power pump by the different closed states of the relay contacts, thereby improving the efficiency of offshore operations. In addition, the opening and closing of the CAN communication control mode and the local control mode are respectively controlled by two button switches. The two switches are independently controlled to increase the safety of circuit control. The opening and closing states of the CAN communication control mode and the local control mode are fed back to the host computer through the fourth aviation plug component, intuitively displaying the opening and closing states of the CAN communication control mode and the local control mode, thereby improving the safety of offshore operations.

[0099] Example 3

[0100] Based on Example 1, Figure 1 、 Figure 2 As shown, the pump group switching control box provided by the present invention also includes an overload relay 3KA, an overheating relay 4KA, a pulse relay AX1, a temperature relay K1, a second relay 1KA, an input circuit breaker 1QF, a phase loss detector K2, a first indicator light 4HL, a second indicator light 5HL, a third indicator light 3HL, a fourth indicator light 7HL, a fifth indicator light 1HL, a sixth indicator light 2HL, a seventh indicator light 8HL, an eighth indicator light 6HL, a buzzer BZ, a first aerial plug assembly, a second aerial plug assembly, a third aerial plug assembly, a fourth aerial plug assembly and a fifth aerial plug assembly.

[0101] The overload relay 3KA is connected between the DC input terminal and the first relay 5KA.

[0102] The overheat relay 4KA is connected in series with the overload relay 3KA and is connected between the DC input terminal and the first relay 5KA.

[0103] Specifically, pulse relay AX1 is connected in series with overload relay 3KA, between the DC input terminal and overload relay 3KA. First indicator light 4HL is connected in parallel with overload relay 3KA, between the DC input terminal and first relay 5KA. Pulse relay AX1 detects an overload in the circuit and controls the opening and closing of overload relay 3KA. When the circuit is overloaded, the circuit between first indicator light 4HL and the DC input terminal is closed, causing first indicator light 4HL to illuminate.

[0104] The second contact of the overload relay 3KA is connected in parallel with the second contact of the overheat relay 4KA, and then connected in series with the buzzer BZ to the DC input terminal.

[0105] Specifically, the temperature relay K1 is connected in series with the overheat relay 4KA, between the DC input and the overheat relay 4KA. The second indicator light 5HL is connected in parallel with the overheat relay 4KA, between the DC input and the first relay 5KA. The temperature relay K1 detects overheating in the circuit and controls the opening and closing of the overheat relay 4KA. When the circuit overheats, the circuit between the second indicator light 5HL and the DC input is closed, causing the second indicator light 5HL to illuminate.

[0106] The second contact of the changeover relay 2KA is connected between the third indicator light 3HL and the DC input terminal.

[0107] The third contact of the changeover relay 2KA is connected between the fourth indicator light 7HL and the DC input terminal.

[0108] Specifically, the third indicator light 3HL is an indicator light for the local control state, and the fourth indicator light 7HL is an indicator light for the CAN remote control state.

[0109] A first contact of the second relay 1KA is connected between the DC input terminal and the first contactor 1KM.

[0110] Specifically, the second relay 1KA is an intermediate relay, which is used to output status feedback signals of the first contactor 1KM and the first power pump M1 in the circuit.

[0111] The fifth indicator light 1HL is connected between the DC input terminal and the first relay 5KA.

[0112] The sixth indicator light 2HL is connected in parallel with the first contactor 1KM, and is connected between the first contact of the first relay 5KA and the DC input terminal.

[0113] The seventh indicator light 8HL is connected in series with the second contactor 2KM, and is connected between the second contact of the first relay 5KA and the DC input terminal.

[0114] Specifically, the working status of the fifth indicator light 1HL indicates the power supply status in the pump group switching control box, the working status of the sixth indicator light 2HL indicates the connection status of the first contactor 1KM, and the working status of the seventh indicator light 8HL indicates the connection status of the second contactor 2KM.

[0115] Optionally, the eighth indicator light 6HL is connected in series with the phase loss detector K2 and then connected to both ends of the AC input terminal.

[0116] Optionally, an input circuit breaker 1QF is further connected between the AC input terminal and the first contactor 1KM, and between the AC input terminal and the second contactor 2KM.

[0117] The first aerial plug assembly is connected to the AC input terminal for receiving AC power.

[0118] Specifically, the pump group switching control box is connected to 380V AC power from the AC power supply end through the first aviation plug assembly.

[0119] The second aerial plug assembly is connected to the first power pump M1 and is used to output alternating current to the first power pump M1.

[0120] Specifically, the pump group switching control box transmits 380V AC power to the first power pump M1 through the second aviation plug assembly.

[0121] The third aviation plug assembly is connected to the second power pump M2 and is used to output alternating current to the second power pump M2.

[0122] Specifically, the pump group switching control box transmits 380V AC power to the second power pump M2 through the third aviation plug assembly.

[0123] The fourth aerial plug component is connected to the host computer and is used to output a feedback signal.

[0124] Specifically, the first button switch 1SB and the second button switch 2SB are both connected to the fourth aviation plug assembly. When the first button switch 1SB and the second button switch 2SB are closed and opened, corresponding status feedback signals are input to the host computer through the fourth aviation plug assembly.

[0125] After the third contact of the overload relay 3KA is connected in parallel with the third contact of the overheat relay 4KA, it is connected to the fourth aviation plug assembly, and the closed state of the overload relay 3KA and the overheat relay 4KA is input to the upper computer through the fourth aviation plug assembly.

[0126] The fourth contact of the transfer relay 2KA is connected to the fourth aviation plug component, and the feedback signal of the switching between the local state and the CAN remote control state is input to the upper computer through the fourth aviation plug component.

[0127] The second contact of the second relay 1KA is connected to the fourth aviation plug assembly, and the third contact of the second relay 1KA is connected to the fourth aviation plug assembly. The status feedback signal of the first contactor 1KM and the first power pump M1 is input to the upper computer through the fourth aviation plug assembly.

[0128] The fifth aviation plug assembly is connected between the CAN communication module and the first contactor 1KM and the second contactor 2KM.

[0129] The pump group switching control box provided in this embodiment provides multiple aviation plug components for the control box to access and output electrical signals and communication signals. The aviation plug components transmit signals to realize the switching of the two control modes of CAN communication control and local control, as well as the switching of the working state of the first power pump and the second power pump. The opening and closing of the CAN communication control and local control modes are respectively controlled by two button switches. The two switches are independently controlled to increase the safety of circuit control. The opening and closing states of the CAN communication control and local control modes are fed back to the host computer through the fourth aviation plug component, intuitively displaying the opening and closing states of the CAN communication control and local control modes. The overload and overheating conditions of the circuit are reflected by the overload relay and the overheating relay. The integrated alarm buzzer alarms when the circuit is overloaded and overheated, and the working conditions of the overload relay and the overheating relay are fed back to the host computer in real time through the fourth aviation plug component to improve the safety of offshore operations. At the same time, the opening and closing of the overload relay and the overheating relay are controlled by the pulse relay and the temperature relay, and indicator lights are installed on the circuits of the pulse relay and the temperature relay respectively. The cause of the fault can be accurately identified according to the indicator light conditions, thereby improving the maintenance efficiency when fault problems occur during offshore operations.

[0130] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0131] Those skilled in the art will appreciate that the control methods described in the various examples of the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0132] In the embodiments provided herein, it should be understood that the disclosed pump group switching control box can be implemented in other ways. For example, the above-described embodiment of a pump group switching control box is merely illustrative. For example, the division of the modules or components is merely a logical functional division. In actual implementation, there may be other division methods. For example, multiple components or modules may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the communication connections shown or discussed may be through some interfaces, communication connections of devices or units or integrated circuits, and may be electrical, mechanical, or other forms.

[0133] In addition, the functional components in the various embodiments of the present application may be integrated into a processing component, or each component may exist physically separately, or two or more components may be integrated into a single component. The above-mentioned integrated components may be implemented in the form of hardware or in the form of electrical functional elements.

[0134] It should be noted that the above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A pump group switching control box, characterized in that: It is electrically connected to the first power pump and the second power pump, and is in communication connection with the host computer, including: DC input terminal, AC input terminal, first contactor, second contactor, switching relay, first relay and CAN communication module; The second contactor is connected in parallel with the first contactor, and the second contactor and the first contactor are connected to both ends of the DC input terminal, wherein the first contactor is connected in series with the first power pump and then connected to both ends of the AC input terminal, and the second contactor is connected in series with the second power pump and then connected to the AC input terminal; The switching relay and the first relay are connected in sequence between the DC input terminal and the first contactor and the second contactor, and both ends of the AC input terminal are connected to a CAN communication module; The first contact of the switching relay is connected between the first relay and the DC input terminal, and is used to switch the conductive state of the first relay and the CAN communication module; The first contact of the first relay is connected to the main contact of the first contactor, and the second contact of the first relay is connected to the main contact of the second contactor; The signal input end of the CAN communication module is communicatively connected to the host computer, and the signal output end of the CAN communication module is communicatively connected to the first contactor and the second contactor respectively; The first relay is in a first state, the first contact of the first relay is closed and connected to the first contactor, the first contactor is connected to the DC input terminal, the first contactor contact is adsorbed and closed, and the first power pump is connected to the AC input terminal through the closed first contactor; The first relay is in the second state, the second contact of the first relay is closed and connected to the second contactor, the second contactor is connected to the DC input terminal, the second contactor contact is adsorbed and closed, and the second power pump is connected to the AC input terminal through the second contactor with closed contacts; The first relay is electrically connected to a liquid level sensing device provided on the first power pump; When the liquid level sensing device detects that the liquid level of the first power pump is higher than or equal to a preset liquid level, the first contact of the first relay is closed and connected to the first contactor; When the liquid level sensing device detects that the liquid level of the first power pump is lower than a preset liquid level, the second contact of the first relay is closed and connected to the second contactor; Also includes: A first aerial plug assembly is connected to the AC input terminal for receiving AC power; a second aerial plug assembly, connected to the first power pump, for outputting alternating current to the first power pump; a third aerial plug assembly, connected to the second power pump, for outputting alternating current to the second power pump; a fourth aerial plug assembly, connected to the host computer, for outputting a feedback signal; The fifth aviation plug assembly is connected between the CAN communication module and the first contactor and the second contactor.

2. A pump group switching control box according to claim 1, characterized in that: Also includes: a first push button switch and a second push button switch, wherein the first push button switch and the second push button switch are both connected between the DC input terminal and the first relay, and the first push button switch, the second push button switch and the transfer relay are connected in parallel to each other and are used to control the conduction state of the first relay and the CAN communication module respectively; The first button switch and the second button switch are both connected to the fourth aviation plug assembly.

3. A pump group switching control box according to claim 1, characterized in that: Also includes: Overload relay and overheat relay; The overheat relay and the overload relay are connected in series and are sequentially connected between the DC input terminal and the first relay; The second contact of the overload relay is connected in parallel with the second contact of the overheat relay and then connected in series with the buzzer to the DC input terminal; The third contact of the overload relay is connected in parallel with the third contact of the overheat relay and is then connected to the fourth aviation plug assembly.

4. A pump group switching control box according to claim 3, characterized in that: Also includes: a pulse relay, connected in series with the overload relay and connected between the DC input terminal and the overload relay; A temperature relay is connected in series with the overheat relay and is connected between the DC input terminal and the overheat relay; a first indicator light, connected in parallel with the overload relay and between the DC input terminal and the first relay; The second indicator light is connected in parallel with the overheat relay and is connected between the DC input terminal and the first relay.

5. A pump group switching control box according to claim 1, characterized in that: The second contact of the conversion relay is connected between the third indicator light and the DC input terminal; The third contact of the conversion relay is connected between the fourth indicator light and the DC input terminal; The fourth contact of the conversion relay is connected to the fourth aviation plug component.

6. A pump group switching control box according to claim 1, characterized in that: Also includes: a second relay, wherein a first contact of the second relay is connected between the DC input terminal and the first contactor; The second contact and the third contact of the second relay are respectively connected to the fourth aviation plug assembly.

7. A pump group switching control box according to claim 1, characterized in that: Also includes: a fifth indicator light, connected between the DC input terminal and the first relay, for indicating a power supply status; a sixth indicator light, connected in parallel with the first contactor and between the first contact of the first relay and the DC input terminal, for indicating a connectivity status of the first contactor; a seventh indicator light, connected in series with the second contactor, connected between the second contact of the first relay and the DC input terminal, and used to indicate the connectivity status of the second contactor.

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