Fire pump unit, control method and storage medium

Abstract

The invention provides a fire pump unit, a control method and a storage medium, the fire pump unit comprises a fire pump, a motor and an internal combustion engine, the fire pump is provided with a main shaft, the main shaft is provided with a first tail end and a second tail end, the first tail end is coupled with a motor rotating shaft through a first clutch, and the second tail end is coupled with a second clutch; the second tail end is coupled with a rotating shaft of the internal combustion engine through a second clutch; the fire pump unit is only provided with one fire pump, and the fire pump can be selectively enabled to be in a motor-only driving mode, an internal combustion engine-only driving mode and a motor-internal combustion engine dual-driving mode through connection and disengagement of the clutch. Under the condition that a power supply network is powered off, the energy storage device can provide transient power supply for the motor, and then the motor is converted into an internal combustion engine mode, so that the fire pump can convey enough fire-fighting liquid in an extremely short time, and a fire behavior is rapidly controlled.

Description

Technical Field

[0001] The present invention relates to the field of fire fighting technology, and in particular to a fire fighting pump unit, a control method thereof and a storage medium. Background Art

[0002] Fire pump units are very important firefighting facilities. When a fire accident occurs, the fire pump unit will suck water and other fire-fighting liquids from the inlet pipe of the fire pump, and discharge them from the outlet pipe after being pressurized by the fire pump impeller. Since a fire is very likely to be accompanied by a power outage, the fire pump unit usually adopts the form of two sets of pumps: one is a motor-fire pump combination, which is used for normal operation; the other is an internal combustion engine-fire pump combination, which is used for operation when the power grid is out of power.

[0003] When the power grid is out of power, the current fire pump unit can only start the internal combustion engine to drive the fire pump. At the beginning of a fire, the fire pump unit needs to quickly output enough firefighting fluid to immediately control the fire, but the internal combustion engine has a small starting torque and it is difficult to reach the required power in a short time after starting, so it is difficult to immediately output enough firefighting fluid.

[0004] Therefore, it is urgent to propose new fire pump unit technology. Summary of the invention

[0005] The main purpose of the present invention is to provide a fire pump unit and its control method and storage medium, aiming to solve the technical problems of fire pump redundancy, energy waste during trial operation and test, and insufficient output power in the initial stage of internal combustion engine startup in the current "one in use and one in standby" fire pump unit.

[0006] In a first aspect, to achieve the above-mentioned object, the present invention provides a fire pump unit, including a fire pump, a motor, and an internal combustion engine; The fire pump is provided with a main shaft, and the main shaft is provided with a first end and a second end, wherein the first end is coupled to the motor shaft through a first clutch, and the second end is coupled to the internal combustion engine shaft through a second clutch; the first clutch and the second clutch both have two working modes of engagement and disengagement: when the first clutch and / or the second clutch are in the engaged working mode, torque transmission can be achieved; and when the first clutch and the second clutch are in the disengaged working mode, torque transmission cannot be achieved; The fire pump unit also includes: a hydraulic generator and an energy storage device, wherein the hydraulic generator is arranged on a branch pipe, the two ends of the branch pipe are respectively connected to the inlet pipe and the outlet pipe of the fire pump, and a branch pipe valve is arranged on the branch pipe; The energy storage device is electrically connected to the hydroelectric generator and the motor respectively, and a switch is provided on the connection line between the energy storage device and the motor.

[0007] Optionally, when the first clutch is in the engaged working mode and the second clutch is in the disengaged working mode, the fire pump is driven only by the motor; when the second clutch is in the engaged working mode and the first clutch is in the disengaged working mode, the fire pump is driven only by the internal combustion engine; when the first clutch and the second clutch are in the engaged working mode at the same time, the fire pump is driven by both the motor and the internal combustion engine.

[0008] Optionally, in the above-mentioned fire pump unit, the internal combustion engine is a gasoline engine or a diesel engine.

[0009] An outlet valve is arranged on the outlet pipeline of the fire pump.

[0010] Optionally, in the fire pump unit, an impeller is provided on the main shaft.

[0011] Optionally, the fire pump unit further includes a controller electrically connected to the motor, the internal combustion engine, the first clutch, the second clutch, the branch valve and the outlet valve respectively.

[0012] Optionally, the controller is also electrically connected to a power supply network of the motor to monitor online whether the power supply network is in a normal power supply state.

[0013] In a second aspect, the present invention further provides a control method for a fire pump unit as described in any one of the above items, comprising: Obtain the working status of the fire pump unit, wherein the working status includes a normal state and a power-off state; In the power-off state, the first clutch and the second clutch are controlled to be in the engaged working mode, so that the motor and the internal combustion engine drive the main shaft to rotate simultaneously; after maintaining for a certain period of time, the first clutch is controlled to be in the disengaged working mode, so that the internal combustion engine drives the main shaft to rotate.

[0014] Optionally, the control method of the above-mentioned fire pump unit also includes: performing regular trial operation of the fire pump unit, wherein during the trial operation, the fire pump is in a mode driven only by a motor or only by an internal combustion engine, and the branch pipe valve is opened, the outlet valve is closed, and the switch is disconnected, so that the high-pressure liquid in the pump flows into the branch pipe, driving the hydroelectric generator to generate electricity and charge the energy storage device.

[0015] In a third aspect, the present invention further provides a computer-readable storage medium, which stores a control program of a fire pump unit control method, wherein the control program of the fire pump unit control method is loaded and executed by a processor according to any one of the above-mentioned fire pump unit control methods.

[0016] The following is an introduction to the beneficial effects of the technical solution of the present invention: 1. The fire pump unit of the present invention is provided with only one fire pump, the main shaft of which is mechanically connected to the motor and the internal combustion engine through a clutch, respectively. The fire pump can be selectively placed in the motor-only drive, the internal combustion engine-only drive, and the motor-internal combustion engine dual drive modes by engaging and disengaging the clutch. When there is no power supply from the power grid, the motor-internal combustion engine dual drive mode is first adopted, and then switched to the internal combustion engine-only drive mode, which helps to quickly output sufficient power to the fire pump in a very short time after starting so that it can deliver fire-fighting liquid with sufficient flow and head, and quickly control the fire.

[0017] When there is no power supply from the power grid, the motor-internal combustion engine dual drive mode is first used. In this mode, the energy storage device can briefly provide electrical energy to the motor to work for tens of seconds to minutes, and then switch to the internal combustion engine drive mode. Because the motor can output a large torque immediately after starting, it can output the required high power to the fire pump within seconds. The torque of the internal combustion engine at the moment of starting is small, and it takes tens of seconds to minutes to reach the high power required by the fire pump. Especially when the ambient temperature is low, the water temperature and oil temperature of the internal combustion engine are also low, and it takes a relatively long time to reach the designed output power.

[0018] 2. Compared with the traditional "one in use and one in standby" fire pump unit consisting of one motor, one internal combustion engine and two fire pumps, the technical solution of the present invention reduces one fire pump, which helps to reduce manufacturing and maintenance costs and save installation space.

[0019] 3. The technical solution of the present invention includes a hydroelectric generator. Usually, it is necessary to conduct a startup test on the fire pump unit regularly to ensure that it is in a state that can be started at any time. During the trial run test, the fire pump outlet pipe valve is closed to prevent the fire liquid from being discharged, but in this case, the impeller still works on the liquid to convert it into heat energy, which not only causes energy waste, but also causes unnecessary temperature rise of the equipment, which is not conducive to ensuring the service life of the equipment. In the technical solution of the present invention, during the trial run test, the liquid after the pressure in the pump rises flows from the outlet pipe into the branch pipe, pushing the impeller of the hydroelectric generator in the branch pipe to rotate and work, and then flows back through the inlet pipe for the next cycle. This converts the pressure energy of the liquid into the mechanical energy of the hydroelectric generator and finally converts it into electrical energy and stores it in the energy storage device. Therefore, it has a good energy-saving effect and helps to suppress the temperature rise of the liquid during the trial run test.

[0020] Therefore, the technical solution of the present invention reduces one fire pump on the basis of the current "one in use and one in standby" fire pump unit, which helps to save equipment procurement and maintenance costs, save installation space, can effectively compensate for the output power of the unit in the initial stage of internal combustion engine startup and help improve the unit's energy efficiency indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of a fire pump unit in an embodiment of the present invention.

[0022] 1-fire pump; 11-main shaft; 101-first end; 102-second end; 12-inlet pipe; 13-outlet pipe; 14-outlet valve; 2-motor; 3-internal combustion engine; 4-hydraulic generator; 5-energy storage device; 51-connecting line; 52-switch; 61-first clutch; 62-second clutch; 7-branch pipe; 71-branch pipe valve. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1 As shown, Figure 1 In the figure, the branch pipe 7 is cut off and the cut surface is indicated by a wavy line.

[0025] The present invention provides a fire pump unit, comprising a fire pump 1, a motor 2, an internal combustion engine 3, a hydroelectric generator 4 and an energy storage device 5; The fire pump 1 is provided with a main shaft 11, and the main shaft 11 is provided with a first end 101 and a second end 102, wherein the first end 101 is coupled to the rotating shaft of the motor 2 through a first clutch 61, and the second end 102 is coupled to the rotating shaft of the internal combustion engine 3 through a second clutch 62; The first clutch 61 and the second clutch 62 both have two working modes: when the first clutch 61 and / or the second clutch 62 are in the engaged working mode, torque transmission can be achieved; and when the first clutch 61 or the second clutch 62 is in the disengaged working mode, torque transmission cannot be performed.

[0026] Specifically, when the first clutch 61 is in the engaged working mode and the second clutch 62 is in the disengaged working mode, the fire pump 1 is driven only by the motor 2; when the second clutch 62 is in the engaged working mode and the first clutch 61 is in the disengaged working mode, the fire pump 1 is driven only by the internal combustion engine 3; when the first clutch 61 and the second clutch 62 are in the engaged working mode at the same time, the fire pump 1 is driven by the motor 2 and the internal combustion engine 3 at the same time.

[0027] Since the main shaft 11 and the first clutch 61 of the fire pump 1 and the second clutch 62 of the main shaft 11 of the fire pump 1 can be freely controlled, when there is no power supply from the power grid, the motor-internal combustion engine dual drive mode is first adopted. In this mode, the energy storage device can briefly provide electric energy for the motor 2 to work for tens of seconds to several minutes, and then switch to the internal combustion engine 3 drive mode. Because the motor 2 can output a large torque immediately after starting, it can output the required high power to the fire pump within a few seconds. The torque of the internal combustion engine 3 at the moment of starting is small, and it takes tens of seconds to several minutes to reach the high power required by the fire pump. Especially when the ambient temperature is low, the water temperature and oil temperature of the internal combustion engine are also low, and it takes a relatively long time to reach the designed output power. Therefore, when there is no power supply from the power grid, the motor-internal combustion engine dual drive mode is first adopted, and then switched to the internal combustion engine drive mode, which helps to quickly output enough power to the fire pump 1 in a very short time after starting so that it can transport fire-fighting liquid with sufficient flow and head, and quickly control the fire.

[0028] The hydroelectric generator 4 is arranged on a branch pipe 7 , both ends of which are respectively connected to an inlet pipe 12 and an outlet pipe 13 of the fire pump 1 , and a branch pipe valve 71 is arranged on the branch pipe 7 .

[0029] The energy storage device 5 is electrically connected to the hydroelectric generator 4 and the motor 2, respectively, and a switch 52 is provided on the connection line 51 between the energy storage device 5 and the motor 2; specifically, the duration of the motor 2 and the internal combustion engine 3 driving the main shaft 11 to rotate at the same time is the duration that the energy storage device 5 can support the operation of the motor 2. Usually, this duration is between 30 seconds and 200 seconds. In one embodiment, the energy storage device 5 is a power-type lithium iron phosphate lithium-ion battery pack including a battery management system.

[0030] An outlet valve 14 is provided on the outlet pipe 13 of the fire pump 1 .

[0031] Preferably, in the fire pump unit, the internal combustion engine 3 is a gasoline engine or a diesel engine.

[0032] In one embodiment, the internal combustion engine 3 is a diesel engine, which takes 30 seconds to 200 seconds from startup to stable operation depending on the ambient temperature.

[0033] In one embodiment, the first clutch 61 and the second clutch 62 each include a clutch disc, a clutch housing, a clutch gear, a clutch spring, and other parts. When the clutch is in a clutch state, when the clutch disc is connected to the clutch gear, the clutch is in an engaged working mode; when the clutch disc is separated from the clutch gear, the clutch is in a disengaged working mode. The clutch is currently a very mature mechanical connection element.

[0034] Preferably, in the fire pump unit, the main shaft 11 is provided with an impeller (not shown).

[0035] Preferably, the fire pump unit further comprises a controller electrically connected to the motor 2, the internal combustion engine 3, the first clutch 61, the second clutch 62, the branch valve 71 and the outlet valve 14 respectively. Figure 1 Not drawn in.

[0036] Preferably, the controller is also electrically connected to the power supply network of the motor 2 to monitor online whether the power supply network is in a normal power supply state.

[0037] In one embodiment, the controller measures the voltage of the power supply network online. When the voltage is greater than a preset voltage threshold, it is considered that the power supply network is in a normal power supply state.

[0038] Please refer again Figure 1 The present invention also provides a control method for a fire pump unit as described in any one of the above items, comprising the following steps: Step s10: Obtain the working status of the fire pump unit, wherein the working status includes a normal state and a power-off state.

[0039] Among them, in the normal state, the power supply network can supply power to the motor. Specifically, the fire pump unit is provided with a circuit detection device (not shown) in the power supply to detect the power supply status of the motor. The signal obtained by the circuit detection device is sent to the controller, and the controller compares it with the pre-stored signal. If the comparison results are the same, the judgment result indicates that the circuit is normal and the fire pump unit is in a normal state. Correspondingly, when the signal obtained by the circuit detection device is compared with the pre-stored signal, if the comparison results are different, the judgment result indicates that the circuit is in a power-off state. According to the judgment result, step s20 or step s30 is selectively executed.

[0040] Step s20: Under normal conditions, the controller puts the first clutch 61 in the engagement working mode and the second clutch 62 in the disengagement working mode, closes the branch valve 71, opens the outlet valve 14, and disconnects the switch 52, thereby allowing the motor 2 to drive the main shaft 11 to rotate.

[0041] When the power supply network can supply power normally, the fire pump 1 can be supplied with energy by only the motor 2, which will not be described in detail here.

[0042] Step s30: In the power-off state, the controller first puts the first clutch 61 and the second clutch 62 in the engagement working mode, closes the branch valve 71, opens the outlet valve 14, closes the switch 52, and supplies power to the electrodes of the energy storage device 5, so that the motor 2 and the internal combustion engine 3 drive the main shaft 11 to rotate at the same time; after maintaining for a certain period of time, the first clutch 61 is put in the disengagement working mode, and the switch 52 is disconnected, so that only the internal combustion engine 3 drives the main shaft 11 to rotate.

[0043] When there is no power supply from the power grid, the motor-internal combustion engine dual drive mode is first used. In this mode, the energy storage device can briefly provide power to the motor 2 to work for tens of seconds to several minutes. When the internal combustion engine 3 reaches sufficient power, it switches to the internal combustion engine 3 drive mode only.

[0044] It should be noted that: because the motor 2 can output a large torque immediately after starting, it can output the required high power to the fire pump within a few seconds. However, the torque of the internal combustion engine 3 is relatively small at the moment of starting, and it takes tens of seconds to several minutes to reach the high power required by the fire pump. Especially when the ambient temperature is low, the water temperature and oil temperature of the internal combustion engine are also low, and it takes a relatively long time to reach the designed output power.

[0045] Therefore, when there is no power supply from the power grid, the motor-internal combustion engine dual drive mode is first adopted, and then switched to the internal combustion engine drive mode only, which helps to quickly output sufficient power to the fire pump 1 in a very short time after starting so that it can transport fire-fighting liquid with sufficient flow and head, and quickly control the fire.

[0046] Preferably, the control method of the fire pump unit further includes: Step s40: Perform a regular trial run on the fire pump unit, during which the fire pump 1 is in a mode driven only by the motor 2 or only by the internal combustion engine 3, and the branch pipe valve 71 is opened, the outlet valve 14 is closed, and the switch 52 is disconnected, so that the high-pressure liquid in the pump flows into the branch pipe 7, driving the hydroelectric generator 4 to generate electricity and charge the energy storage device 5.

[0047] The purpose of the regular test run is to test the fire pump unit to ensure that it is ready to start at any time. The hydroelectric generator 4 generates electricity for the energy storage device 5 so that the energy storage device 5 can supply power to the motor 2 in the event of a power outage.

[0048] The present invention also provides a computer-readable storage medium, which stores a control program of a fire pump unit control method. The control program of the fire pump unit control method is loaded and executed by a processor according to any one of the above-mentioned fire pump unit control methods.

[0049] In a more specific embodiment: please refer to Figure 1 This embodiment.

[0050] In this embodiment, the energy storage device 5 is a lithium iron phosphate lithium-ion battery pack, and the internal combustion engine 3 is a diesel engine. The diesel engine takes 30 seconds to start and run stably at normal temperature, and takes at most 200 seconds at low temperature.

[0051] In this embodiment, the voltage threshold used by the controller to determine whether the power supply network is in a normal power supply state is 180V.

[0052] The fire pump unit is tested for trial operation every six months. During the trial operation, the fire pump 1 is first driven by the motor 2 for 1 minute, and then driven by the internal combustion engine 3 for 1 minute. During the operation, the branch pipe valve 71 is opened, the outlet valve 14 is closed, and the switch 52 is disconnected, so that the high-pressure liquid in the pump can flow into the branch pipe 7, drive the hydroelectric generator 4 to generate electricity and charge the energy storage device 5.

[0053] A fire drill was conducted on a certain day, simulating a fire and using a fire pump unit to draw water from a water reservoir and pressurize it before spraying it out from outlet pipe 13.

[0054] In the first stage of the exercise, the power grid is simulated to be in normal power supply. In this case, the controller makes the first clutch 61 in the engaged working mode and the second clutch 62 in the disengaged working mode, closes the branch valve 71, opens the outlet valve 14, and disconnects the switch 52, so that the motor 2 drives the main shaft 11 to rotate and the fire pump 1 works.

[0055] In the second stage of the exercise, the power grid is simulated to be in a power-off state. In this case, the controller measures the voltage of the power grid online to be 0V, and determines that the fire pump unit is in a power-off state. The controller first sets the first clutch 61 and the second clutch 62 in the engagement working mode, closes the branch pipe valve 71, opens the outlet valve 14, closes the switch 52, and enables the energy storage device 5 to supply power to the electrodes, so that the motor 2 and the internal combustion engine 3 drive the main shaft 11 to rotate at the same time; after 30 seconds, the first clutch 61 is set in the disengagement working mode, and the switch 52 is opened, so that only the internal combustion engine 3 drives the main shaft 11 to rotate.

[0056] The fire pump unit in the embodiment of the present invention is provided with only one fire pump 1, and the fire pump 1 can be selectively placed in the motor-only drive, internal combustion engine-only drive, and motor-internal combustion engine dual drive modes by engaging and disengaging the clutch. When there is no power supply from the power grid, the motor-internal combustion engine dual drive mode is first adopted, and then switched to the internal combustion engine-only drive mode, which helps to quickly output sufficient power to the fire pump 1 in a very short time after starting so that it can deliver fire-fighting liquid with sufficient flow and head to quickly control the fire. At the same time, compared with the traditional "one-in-one-standby" fire pump unit consisting of one motor 2, one internal combustion engine 3 and two fire pumps 1, the technical solution in the embodiment of the present invention reduces one fire pump 1, which helps to reduce manufacturing and maintenance costs and save installation space.

[0057] In addition, the embodiment of the present invention includes a hydroelectric generator 4. During the trial run test, the liquid after the pressure in the pump rises flows from the outlet pipe 13 into the branch pipe 7, driving the impeller of the hydroelectric generator 4 in the branch pipe 7 to rotate and do work, and then flows back through the inlet pipe 12 for the next cycle. This converts the pressure energy of the liquid into mechanical energy of the hydroelectric generator 4 and finally into electrical energy stored in the energy storage device 5, so it has a good energy-saving effect and helps to suppress the temperature rise of the liquid during the trial run test.

[0058] Therefore, the technical solution in the embodiment of the present invention reduces one fire pump 1 on the basis of the current "one in use and one in standby" fire pump unit, which helps to save equipment procurement and maintenance costs, save installation space, can effectively compensate for the output power of the unit in the initial stage of starting the internal combustion engine 3 and help to improve the unit's energy efficiency indicators.

Claims

1. A fire pump unit, characterized in that: The invention comprises a fire pump (1), a motor (2), and an internal combustion engine (3), wherein the fire pump (1) is provided with a main shaft (11), wherein the main shaft (11) is provided with a first end (101) and a second end (102), wherein the first end (101) is coupled to the rotating shaft of the motor (2) through a first clutch (61), and the second end (102) is coupled to the rotating shaft of the internal combustion engine (3) through a second clutch (62); the first clutch (61) and the second clutch (62) both have two working modes, namely, engagement and disengagement: when the first clutch (61) and / or the second clutch (62) are in the engagement working mode, torque transmission can be achieved; and when the first clutch (61) and the second clutch (62) are in the disengagement working mode, torque transmission cannot be achieved; The fire pump unit further comprises: a hydraulic generator (4) and an energy storage device (5); the hydraulic generator (4) is arranged on a branch pipe (7); two ends of the branch pipe (7) are respectively connected to an inlet pipe (12) and an outlet pipe (13) of the fire pump (1); and a branch pipe valve (71) is arranged on the branch pipe (7); The energy storage device (5) is electrically connected to the hydroelectric generator (4) and the motor (2), respectively, and a switch (52) is provided on the connection line (51) between the energy storage device (5) and the motor (2); An outlet valve (14) is provided on the outlet pipe (13) of the fire pump (1).

2. The fire pump unit according to claim 1, characterized in that: When the first clutch (61) is in an engaged working mode and the second clutch (62) is in a disengaged working mode, the fire pump (1) is driven only by the motor (2); when the second clutch (62) is in an engaged working mode and the first clutch (61) is in a disengaged working mode, the fire pump (1) is driven only by the internal combustion engine (3); when the first clutch (61) and the second clutch (62) are both in an engaged working mode, the fire pump (1) is driven simultaneously by the motor (2) and the internal combustion engine (3).

3. The fire pump unit according to claim 1, characterized in that: The internal combustion engine (3) is a gasoline engine or a diesel engine.

4. The fire pump unit according to claim 1, characterized in that: The main shaft (11) is provided with an impeller.

5. The fire pump unit according to claim 1, characterized in that: It also includes a controller electrically connected to the motor (2), the internal combustion engine (3), the first clutch (61), the second clutch (62), the branch valve (71) and the outlet valve (14).

6. The fire pump unit according to claim 5, characterized in that: The controller is also electrically connected to the power supply network of the motor (2) to monitor online whether the power supply network is in a normal power supply state.

7. The control method for a fire pump unit according to any one of claims 1 to 6, characterized in that: include: Obtain the working status of the fire pump unit, wherein the working status includes a normal state and a power-off state; In the power-off state, the first clutch (61) and the second clutch (62) are controlled to be in an engaged working mode, so that the motor (2) and the internal combustion engine (3) simultaneously drive the main shaft (11) to rotate; after maintaining for a certain period of time, the first clutch (61) is controlled to be in a disengaged working mode, so that the internal combustion engine (3) drives the main shaft (11) to rotate.

8. The control method of the fire pump unit according to claim 7, characterized in that: Also includes: The fire pump unit is tested regularly, wherein during the test run, the fire pump (1) is in a mode driven only by the motor (2) or only by the internal combustion engine (3), and the branch pipe valve (71) is opened, the outlet valve (14) is closed, and the switch (52) is disconnected, so that the high-pressure liquid in the pump flows into the branch pipe (7), drives the hydroelectric generator (4) to generate electricity and charges the energy storage device (5).

9. A computer-readable storage medium storing a control program of a fire pump unit control method, characterized in that: The control program of the fire pump unit control method is loaded and run by a processor to execute the fire pump unit control method according to any one of claims 7 to 8.

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