Fault switching control module for dual-purpose and one-standby fire pump

Abstract

The utility model discloses a dual-purpose and one-standby fire pump fault switching control module which comprises a remote forced starting control module, a pump starting control module and a fault switching module, and the pump starting control module comprises a time delay relay and a starting relay. The starting relay is used for controlling the main pump to be connected or disconnected with the power supply circuit through the star-delta starting control circuit, and the remote forced starting control module can respond to a starting signal sent by a remote upper computer and control the main pump to be started through the starting relay in the pump starting control module; the time delay relay responds to a trigger signal sent by an external control system according to the detection signal, and controls the main pump to start through a starting relay in the pump starting control module; the fault switching module can detect the operation states of the two main pumps, and when the main pumps break down, the fault switching module automatically controls the standby pump to be started. According to the utility model, the running state of the main pump can be accurately judged, and the standby pump can be quickly and correctly switched.

Description

Technical Field

[0001] This utility model relates to the field of electrical control technology, and in particular to a fault switching control module for a fire pump that is used in both power and standby modes. Background Technology

[0002] As a core component of fire protection systems, the reliable operation of fire pumps is crucial for fire suppression and the protection of life and property. In practical applications, to ensure the continuous availability of fire pumps, a multi-pump configuration is typically used, including a main pump and a standby pump, with automatic switching between pumps achieved through a fault-tolerant control system.

[0003] However, existing dual-use, one-standby fire pump control technology has a series of problems. In terms of fault detection, it often relies solely on monitoring parameters such as pump current and voltage, making it difficult to comprehensively and accurately determine the pump's operating status, leading to frequent misdiagnosis or missed faults. On the other hand, in terms of switching control strategies, existing fault-switching control systems have a slow response speed. When the primary pump fails, it cannot quickly switch to the standby pump, potentially affecting the normal water supply of the fire protection system and delaying the optimal time for fire suppression. Simultaneously, existing control modules lack remote monitoring and management functions, failing to achieve real-time remote control of the fire pump's operating status, which is detrimental to timely fault detection and handling. Therefore, it is necessary to improve existing technology to overcome its shortcomings. Utility Model Content

[0004] The problem to be solved by this utility model is to provide a fault switching control module for a fire pump that can be used in two ways and has one standby, so as to overcome the shortcomings of existing fire pumps in terms of fault switching accuracy, fault detection capability and remote control, which cannot meet the increasingly higher fire safety requirements.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a dual-use, one-standby fire pump fault switching control module, comprising: a remote forced start control module, a pump start control module, and a fault switching module. The pump start control module includes a time delay relay and a start relay. The start relay is used to control the main pump to be connected or disconnected from the power circuit through a star-delta start control circuit. The remote forced start control module can respond to the start signal sent by a remote host computer and control the start of the main pump through the start relay in the pump start control module. The time delay relay can respond to the trigger signal sent by the external control system based on the detection signal and control the start of the main pump through the start relay in the pump start control module. The fault switching module can detect the operating status of the two main pumps, and when any one of the main pumps fails, the fault switching module automatically controls the standby pump to start.

[0006] As a further improvement of this utility model, the pump start control module includes a first start control circuit and a second start control circuit for controlling the start of two main pumps respectively. When the remote forced start control module responds to the start signal sent by the remote host computer, the remote forced start control module controls one of the corresponding main pumps to start immediately through the first start control circuit, while the remote forced start control module controls the other main pump to start after a delay through the second start control circuit.

[0007] As a further improvement of this utility model, the remote forced start control module includes a fourth 11-1 relay, a fourth 13-1 relay, and a fourth 3-2 time delay relay. The coils of the fourth 13-1 relay and the fourth 3-2 time delay relay are connected in parallel and then connected in series with the normally open contact of the fourth 11-1 relay to the power supply. The first normally open contact of the fourth 13-1 relay is connected to the first start control circuit, and the normally open contact of the fourth 3-2 time delay relay is connected to the second start control circuit.

[0008] As a further improvement of this utility model, both the first start control circuit and the second start control circuit include the time delay relay and the start relay; in the first start control circuit, the start relay is a first seven-relay, and the coil of the first seven-relay is connected in series with the first normally open contact of the fourth three-relay to the power supply; in the second start control circuit, the start relay is a second seven-relay, and the coil of the second seven-relay is connected in series with the normally open contact of the fourth three-time delay relay to the power supply.

[0009] As a further improvement of this utility model, the first start control circuit further includes a first second relay and a first fourth relay. The normally open contact of the first seventh relay, the normally closed contact of the first second relay, and the normally closed contact of the first fourth relay are connected in series and then connected in parallel with the first normally open contact of the fourth third relay.

[0010] As a further improvement of this utility model, the second start control circuit also includes a second second relay and a second fourth relay. The normally open contact of the second seventh relay, the normally closed contact of the second second relay, and the normally closed contact of the second fourth relay are connected in series and then connected in parallel with the normally open contact of the fourth third delay relay.

[0011] As a further improvement of this utility model, the fault switching module includes two fault switching circuits respectively connected to the first start control circuit and the second start control circuit. The fault switching circuit is used to automatically control the standby pump to start when a corresponding main pump fails.

[0012] As a further improvement of this utility model, the fault switching circuit includes a logic relay, a switching relay, and a third-seventh relay. When both main pumps are working normally, the logic relay is energized and in an open state. At the same time, the logic relay controls the switching relay and the third-seventh relay to be in an open state, thereby controlling the standby pump to be disconnected from the power circuit. When either of the two main pumps fails, the logic relay is de-energized and in a closed state. At the same time, the logic relay controls the switching relay and the third-seventh relay to switch to a closed state, thereby controlling the standby pump to be connected to the power circuit.

[0013] As a further improvement of this utility model, the dual-use and standby fire pump fault switching control module also includes a PCB board, on which the remote forced start control module, the pump start control module and the fault switching module are all mounted.

[0014] As a further improvement of this utility model, the detection signals include water flow signals, water pressure signals, and fault alarm signals.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a dual-use, standby fire pump fault switching control module. Through effective fault detection and rapid switching mechanisms, as well as comprehensive status monitoring, it can accurately determine the operating status of the fire pump, effectively avoid misjudgment and omission of faults, significantly improve the reliability and stability of the fire pump system, and provide stronger protection for fire safety. Furthermore, in the event of an emergency such as a fire, even if the on-site control equipment malfunctions or personnel cannot reach the site to operate, the remote forced start control module can ensure that the fire pump starts quickly and provides the water pressure and volume required for fire extinguishing in a timely manner. At the same time, through the integrated deployment on the PCB board, wiring can be reduced, the electrical circuit structure can be simplified, the control circuit volume can be reduced, and the system reliability can be improved. Attached Figure Description

[0016] Figure 1 This is the circuit diagram of the dual-use, standby fire pump fault switching control module of this utility model.

[0017] Referring to the accompanying drawings, the following explanations are provided:

[0018] KA1-2, First and Second Relays; KA1-4, First and Fourth Relays; KA1-7, First and Seventh Relays; KA2-2, Second and Second Relays; KA2-4, Second and Fourth Relays; KA2-7, Second and Seventh Relays; KA3-2, Third and Second Relays; KA3-4, Third and Fourth Relays; KA3-7, Third and Seventh Relays; KA4-11, Fourth and First Relays; KA4-13, Fourth and First Third Relays; KT0, Zeroth Delay Relay; KT0-1, Zeroth and First Delay Relays; KT1-7, First and Seventh Delay Relays; KT2-7, Second and Seventh Delay Relays; KT11, First and First Delay Relays; KT12, First and Second Delay Relays; KAQ-1, First Logic Relay; KAQ-2, Second Logic Relay; V203, Power Supply. Detailed Implementation

[0019] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] See Figure 1 This utility model provides a fault switching control module for a dual-use, one-standby fire pump, comprising: a remote forced start control module, a pump start control module, a fault switching module, two main pumps, and one standby pump. The two main pumps and the standby pump are each connected to the power supply circuit via their respective connected star-delta start control circuits.

[0021] Furthermore, the pump start control module includes a time delay relay and a start relay. The start relay is used to control the on / off state of the star-delta start control circuit, thereby controlling the main pump to be connected or disconnected from the power supply circuit.

[0022] In this invention, the main pump can be started remotely or automatically by a detection signal.

[0023] The remote forced start function is as follows: the remote forced start control module can respond to the start signal sent by the remote host computer and control the start relay in the pump start control module to start the main pump.

[0024] The automatic start triggered by the detection signal is as follows: In the application scenarios of fire pumps and fire pipe networks, multiple detectors are installed, including but not limited to water flow indicators, pressure sensors, fire detectors, etc., to monitor various detection signals such as water flow signals, water pressure signals, and alarm signals in real time, and can feed back the detection signals to the external control system. The external control system then issues a trigger signal based on the detection signal. The time delay relay can respond to the trigger signal and generate an action, which controls the start relay in the pump start control module to act, thereby controlling the start of the main pump.

[0025] Furthermore, the fault switching module can detect the operating status of the two main pumps, and when either main pump fails (such as the main pump tripping or the contactor in the star-delta start control circuit not operating), the fault switching module automatically controls the standby pump to start.

[0026] This invention, through effective fault detection and rapid switching mechanisms and comprehensive status monitoring, can accurately determine the operating status of fire pumps, effectively avoid misjudgment and omission of faults, significantly improve the reliability and stability of fire pump systems, provide stronger protection for fire safety, and ensure that even if the on-site control equipment malfunctions or personnel cannot reach the site to operate in the event of a fire or other emergency, the remote forced start control module can ensure that the fire pump starts quickly and provides the water pressure and volume required for fire extinguishing in a timely manner.

[0027] In this invention, the pump start control module includes a first start control circuit and a second start control circuit for controlling the start of two main pumps. When the remote forced start control module responds to a start signal from a remote host computer, it controls one of the main pumps to start immediately via the first start control circuit, while simultaneously controlling the other main pump to start with a delay via the second start control circuit. This method avoids the instantaneous excessive current and load generated when two main pumps start simultaneously, preventing impact on the power grid and equipment, thus helping to protect the electrical system and fire pumps and extending their service life.

[0028] See Figure 1 The remote forced start control module includes a fourth relay KA4-11, a fourth relay KA4-13, and a fourth delay relay KT4-3. The coils of the fourth relay KA4-13 and the fourth delay relay KT4-3 are connected in parallel and then connected in series with the normally open contact of the fourth relay KA4-11 to the power supply V203. The first normally open contact (i.e., contacts 5 and 6) of the fourth relay KA4-13 is connected to the first start control circuit, and the normally open contact of the fourth delay relay KT4-3 is connected to the second start control circuit.

[0029] The first and second start control circuits in this invention both include a time delay relay and a start relay.

[0030] In the first start-up control circuit, the time-delay relays include a first time-delay relay KT11 and a zeroth time-delay relay KT0, and the start relay is the first seventh relay KA1-7. The first normally open contact of the fourth third relay KA4-13 is connected in series with the coil of the first seventh time-delay relay KA1-7 via the normally closed contact of the first seventh time-delay relay KT1-7. The normally open contact of the first time-delay relay KT11 and the normally open contact of the zeroth time-delay relay KT0 are connected in parallel and then connected in series with the coil of the first seventh time-delay relay KA1-7 via the normally closed contact of the first seventh time-delay relay KT1-7. Simultaneously, the first start-up control circuit also includes a first second relay KA1-2 and a first fourth relay KA1-4. The normally open contact of the seventh relay KA1-7, the normally closed contact of the first second relay KA1-2, and the normally closed contact of the first fourth relay KA1-4 are connected in series and then connected in parallel with the first normally open contact of the fourth third relay KA4-13.

[0031] In the second start-up control circuit, the time-delay relays include the first and second time-delay relays KT12 and the zeroth and first time-delay relays KT0-1, and the start-up relay is the second and seventh relay KA2-7. The normally open contact of the fourth and third time-delay relays KT4-3 is connected in series with the coil of the second and seventh time-delay relays KT2-7 via the normally closed contact of the second and seventh time-delay relays KT2-7 and KA2-7. The normally open contacts of the first and second time-delay relays KT12 and the zeroth and first time-delay relays KT0-1 are connected in parallel and then connected in series with the coil of the second and seventh time-delay relays KT2-7 via the normally closed contact of the second and seventh time-delay relays KT2-7. Simultaneously, the second start-up control circuit also includes the second and second time-delay relays KA2-2 and KA2-4. The normally open contact of the second and seventh time-delay relays KA2-7, the normally closed contact of the second and second time-delay relays KA2-2 and KA2-4 are connected in series and then connected in parallel with the normally open contact of the fourth and third time-delay relays KT4-3.

[0032] When the remote host computer sends a start signal to close the normally open contact of the fourth 11th relay KA4-11, the coils of the fourth 13th relay KA4-13 and the fourth 3rd time delay relay KT4-3 are energized. The normally open contact of the fourth 13th relay KA4-13 closes, energizing the coil of the first 7th relay KA1-7. After the first 7th relay KA1-7 is triggered and self-locked, the corresponding main pump starts. After a set time, the normally open contact of the fourth 3rd time delay relay KT4-3 closes, triggering the second 7th relay KA2-7 and self-locking, which then starts another main pump.

[0033] In this embodiment, both the first delay relay KT11 and the first second delay relay KT12 respond to trigger signals issued by the external control system based on water pressure signals. The zeroth delay relay KT0 and the zeroth first delay relay KT0-1 respond to trigger signals issued by the external control system based on alarm signals. When either the first delay relay KT11 or the zeroth delay relay KT0 is triggered, its normally open contact closes, energizing the coil of the first seventh relay KA1-7. After the first seventh relay KA1-7 is triggered and self-locked, the corresponding main pump starts. When either the first second delay relay KT12 or the zeroth first delay relay KT0-1 is triggered, its normally open contact closes, energizing the coil of the second seventh relay KA2-7. After the second seventh relay KA2-7 is triggered and self-locked, the corresponding main pump starts. The water pressure signal triggered by the zero-delay relay KT0 and the water pressure signal triggered by the zero-first delay relay KT0-1 have different pressure values, which can be used to control the start of one main pump or both main pumps according to the actual situation.

[0034] In this invention, the fault switching module includes two fault switching circuits respectively connected to the first start control circuit and the second start control circuit. The fault switching circuit is used to automatically control the standby pump to start when a corresponding main pump fails.

[0035] The fault switching circuit includes a logic relay, a switching relay, and a third-generation relay KA3-7. When both main pumps are operating normally, the logic relay is energized and in the open state. Simultaneously, the logic relay controls the switching relay and the third-generation relay KA3-7 to be in the open state, thus controlling the standby pump to disconnect from the power circuit. When either of the two main pumps fails, the logic relay is de-energized and in the closed state. Simultaneously, the logic relay controls the switching relay and the third-generation relay KA3-7 to switch to the closed state, thus controlling the standby pump to connect to the power circuit. The third-generation relay KA3-7 controls the on / off state of the star-delta start control circuit connected to the standby pump, thereby controlling the standby pump to connect or disconnect from the power circuit. This invention, by employing this technology, can monitor the operating status of the fire pumps in real time and accurately. Once a fault is detected, it quickly and accurately switches to the standby pump, ensuring that the fire protection system returns to normal operation in the shortest possible time and provides continuous and stable fire water pressure.

[0036] Continue reading Figure 1The logic relays and switching relays in the fault switching circuit connected to the first start-up control circuit are specifically the first logic relay KAQ-1 and the first seventh time-delay relay KT1-7. The first normally open contact of the fourth-first-third relay KA4-13, the normally open contact of the first first time-delay relay KT11, the normally open contact of the zeroth time-delay relay KT0, and the normally closed contact of the first seventh time-delay relay KT1-7 share a first common contact. The normally closed contact of the first logic relay KAQ-1 and the coil of the first seventh time-delay relay KT1-7 are connected in series between the first common contact and ground. The normally open contact of the first seventh time-delay relay KT1-7, the normally closed contact of the third-second relay KA3-2, the normally closed contact of the third-fourth relay KA3-4, and the coil of the third seventh relay KA3-7 are connected in series with power supply V203. In addition, the normally open contact of the third 7th relay KA3-7 is connected in parallel with the normally open contact of the first 7th time delay relay KT1-7. Simultaneously, the second normally open contact (i.e., contacts 3 and 4) of the fourth 13th relay is connected in series between the normally open contact of the third 7th relay KA3-7 and its coil. When the corresponding main pump malfunctions, the coil of the first logic relay KAQ-1 is de-energized, the normally closed contact of the first logic relay KAQ-1 closes, the coil of the first 7th time delay relay KT1-7 is energized, and after a set time, the normally open contact of the first 7th time delay relay KT1-7 closes, the normally closed contact opens, and the main pump stops operating, immediately switching to the standby pump.

[0037] Similarly, the logic relays and switching relays in the fault switching circuit connected to the second start-up control circuit are specifically the second logic relay KAQ-2 and the second seventh time-delay relay KT2-7. A second common contact exists between the normally open contact of the fourth third time-delay relay KT4-3, the normally open contact of the first second time-delay relay KT12, the normally open contact of the zeroth first time-delay relay KT0-1, and the normally closed contact of the second seventh time-delay relay KT2-7. The normally closed contact of the second logic relay KAQ-2 and the coil of the second seventh time-delay relay KT2-7 are connected in series between the second common contact and ground. The normally open contact of the second logic relay KAQ-2 is connected in parallel to the normally open contact of the first seventh time-delay relay KT1-7. When the corresponding main pump fails, the coil of the second logic relay KAQ-2 is de-energized, the normally closed contact of the second logic relay KAQ-2 closes, the coil of the second time delay relay KT2-7 is energized, and after a set time, the normally open contact of the second time delay relay KT2-7 closes and the normally closed contact opens. After the main pump stops running, it immediately switches to the standby pump.

[0038] Currently, the fault switching of existing dual-use and standby fire-fighting equipment is usually controlled by PLC. However, the reliability of PLC control is poor. If the PLC malfunctions, it will cause functional failure. Moreover, the electrical circuit structure is complex, occupies a lot of space, and the wiring is cumbersome and has a high failure rate, which poses hidden dangers to the equipment.

[0039] In response, the dual-use and standby fire pump fault switching control module of this utility model also includes a PCB board. The remote forced start control module, the pump start control module and the fault switching module are all integrated on the PCB board. Through the integrated deployment of the PCB board, wiring can be reduced, the electrical circuit structure can be simplified, the control circuit volume can be reduced, and the system reliability can be improved.

[0040] Many specific details have been set forth in the above description to provide a full understanding of this utility model. However, the above description is only a preferred embodiment of this utility model, and this utility model can be implemented in many other ways different from those described herein. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A fault switching control module for a dual-use, standby fire pump, characterized in that, The system includes: a remote forced start control module, a pump start control module, and a fault switching module. The pump start control module includes a time delay relay and a start relay. The start relay controls the main pump to connect or disconnect from the power circuit via a star-delta start control circuit. The remote forced start control module responds to a start signal sent by a remote host computer and controls the main pump to start via the start relay in the pump start control module. The time delay relay responds to a trigger signal sent by an external control system based on a detection signal and controls the main pump to start via the start relay in the pump start control module. The fault switching module detects the operating status of the two main pumps, and automatically controls the standby pump to start when either main pump fails.

2. The dual-use, standby fire pump fault switching control module according to claim 1, characterized in that: The pump start control module includes a first start control circuit and a second start control circuit for controlling the start of two main pumps respectively. When the remote forced start control module responds to the start signal sent by the remote host computer, the remote forced start control module controls one of the corresponding main pumps to start immediately through the first start control circuit, while the remote forced start control module controls the other main pump to start after a delay through the second start control circuit.

3. The dual-use, standby fire pump fault switching control module according to claim 2, characterized in that: The remote forced start control module includes a fourth relay (KA4-11), a fourth relay (KA4-13), and a fourth delay relay (KT4-3). The coils of the fourth relay (KA4-13) and the fourth delay relay (KT4-3) are connected in parallel and then connected in series with the normally open contact of the fourth relay (KA4-11) to the power supply (V203). The first normally open contact of the fourth relay (KA4-13) is connected to the first start control circuit, and the normally open contact of the fourth delay relay (KT4-3) is connected to the second start control circuit.

4. The dual-use, standby fire pump fault switching control module according to claim 3, characterized in that: Both the first start control circuit and the second start control circuit include the time delay relay and the start relay; in the first start control circuit, the start relay is a first seven-relay (KA1-7), and the coil of the first seven-relay (KA1-7) is connected in series with the first normally open contact of the fourth three-relay (KA4-13) to the power supply (V203); in the second start control circuit, the start relay is a second seven-relay (KA2-7), and the coil of the second seven-relay (KA2-7) is connected in series with the normally open contact of the fourth three-time delay relay (KT4-3) to the power supply (V203).

5. The dual-use, standby fire pump fault switching control module according to claim 4, characterized in that: The first start control circuit also includes a first second relay (KA1-2) and a first fourth relay (KA1-4). The normally open contact of the first seventh relay (KA1-7), the normally closed contact of the first second relay (KA1-2), and the normally closed contact of the first fourth relay (KA1-4) are connected in series and then connected in parallel with the first normally open contact of the fourth third relay (KA4-13).

6. The dual-use, standby fire pump fault switching control module according to claim 4, characterized in that: The second start control circuit also includes a second second relay (KA2-2) and a second fourth relay (KA2-4). The normally open contact of the second seventh relay (KA2-7), the normally closed contact of the second second relay (KA2-2), and the normally closed contact of the second fourth relay (KA2-4) are connected in series and then connected in parallel with the normally open contact of the fourth third time delay relay (KT4-3).

7. The dual-use, standby fire pump fault switching control module according to claim 2, characterized in that: The fault switching module includes two fault switching circuits respectively connected to the first start control circuit and the second start control circuit. The fault switching circuit is used to automatically control the standby pump to start when a corresponding main pump fails.

8. The dual-use, standby fire pump fault switching control module according to claim 7, characterized in that: The fault switching circuit includes a logic relay, a switching relay, and a third-generation seventh relay (KA3-7). When both main pumps are working normally, the logic relay is energized and in the open state. At the same time, the logic relay controls the switching relay and the third-generation seventh relay (KA3-7) to be in the open state, thereby controlling the standby pump to disconnect from the power circuit. When either of the two main pumps fails, the logic relay is de-energized and in the closed state. At the same time, the logic relay controls the switching relay and the third-generation seventh relay (KA3-7) to switch to the closed state, thereby controlling the standby pump to connect to the power circuit.

9. The dual-use, standby fire pump fault switching control module according to claim 1, characterized in that: It also includes a PCB board, on which the remote forced start control module, the pump start control module and the fault switching module are all mounted.

10. The dual-use, standby fire pump fault switching control module according to claim 1, characterized in that: The detection signals include water flow signals, water pressure signals, and alarm signals.

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