Water supply system of multi-mode fire fighting truck and fire fighting truck

Abstract

The invention aims to provide a water supply system of a multi-mode fire fighting truck and the fire fighting truck, the water supply system comprises a high-low pressure fire pump, a portable pump and a vacuum suction pump, and can provide various water supply modes such as fire pump low pressure water supply, high pressure water supply, high-low pressure combined water supply, low pressure and portable pump water supply, high pressure and single portable pump water supply, high-low pressure and portable pump water supply and the like; due to the fact that the multi-mode water supply system is complex in operation and has different requirements for system pressure and flow in different operation modes, safe operation of the water supply system is guaranteed according to a multi-mode water supply automatic control strategy. Different water supply modes can correspond to different water taking depths, water supply flows and pressures, the water supply flows and pressures are flexibly controlled, water supply control and state monitoring of multi-mode water supply operation are achieved, and the running reliability and stability of a water supply system are effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to a water supply system of a multi-mode fire truck and a fire truck, belonging to the technical field of fire fighting equipment. Background Art

[0002] In recent years, forest fires have occurred frequently in my country. Faced with the complex rescue environment and changeable water supply operating conditions of forest fires, conventional water supply vehicles cannot meet the needs of forest fire fighting. Emergency rescue departments urgently need a fire truck with multiple water supply operation modes, which can improve the water intake range, water supply flow and pressure, and solve the problems of traditional water supply vehicles with a single operation mode, small water intake range and insufficient water supply flow. Summary of the Invention

[0003] The purpose of the present invention is to provide a water supply system and a fire truck for a multi-mode fire truck. By adopting different water supply modes according to different water intake ranges, the control system can realize automatic water supply control and status monitoring under this mode, thereby improving the stability and reliability of the continuous operation of the multi-mode water supply system and meeting the actual needs of forest fire fighting.

[0004] In order to achieve the above objectives / solve the above technical problems, the present invention is implemented by adopting the following technical solutions.

[0005] In one aspect, a water supply system for a multi-mode fire truck includes: a main line, a water supply line, a suction vacuum pump, high and low pressure fire pumps, a PLC controller, and a wireless remote control transmitter; A high and low pressure fire pump is provided between the main pipe and the water supply pipe, and an electric control valve is provided at the water inlet of the main pipe and the water outlet of the water supply pipe; A vacuum pump is provided on the main pipe; The water supply pipeline assembly includes a low-pressure water supply branch and a high-pressure water supply branch arranged in parallel, and a high-low pressure switching valve for switching the water supply mode is provided between the high-pressure water supply branch and the main pipeline; The vacuum pump is used to extract the gas in the main pipe in front of the high and low pressure fire pumps to supply water; The high and low pressure fire pumps include: for supplying water to the high pressure water supply branch or the low pressure water supply branch according to the water supply mode; Wireless remote control transmitter, used to remotely send water supply mode instructions; The PLC controller is used to receive instructions on the water supply mode, control the working status of the electric control valve, high and low pressure switching valves, high and low pressure fire pumps and vacuum pumps, and realize automatic control of various water supply modes.

[0006] Furthermore, a vacuum pressure sensor is provided on the main pipe, and the vacuum pressure sensor is used to measure the water supply pressure of the main pipe; A first pressure sensor and a first flow sensor are provided on the low-pressure water supply branch, and the first pressure sensor and the first flow sensor are used to measure the water supply pressure and water supply flow at the water outlet of the low-pressure water supply branch; A second pressure sensor and a second flow sensor are provided on the high-pressure water supply branch, and the second pressure sensor and the second flow sensor are used to measure the water supply pressure and water supply flow at the water outlet of the high-pressure water supply branch.

[0007] Furthermore, it also includes: a portable pump, which is used to replace the vacuum pump to supply water in the main pipeline in front of the high and low pressure fire pumps.

[0008] Furthermore, the water supply mode includes a low-pressure water supply mode and a high-pressure water supply mode; The specific control method of the low-pressure water supply mode is: Connect the water source to the main water inlet, and select the low-pressure water supply mode through the wireless remote control transmitter. The PLC controller closes the electric control valve and high-low pressure switching valve at the outlet of the low-pressure water supply branch, and opens the electric control valve at the water inlet of the main line; Start the vacuum pump to suck water to the water inlet of the high and low pressure fire pumps, and shut down the vacuum pump when the negative pressure reaches the set value; Start the high and low pressure fire pump motors, control them to linearly increase to the rated speed within the set time, and open the electric control valve at the outlet of the low pressure water supply branch to supply water; After the water supply is completed, the low-pressure water supply mode is turned off through the wireless remote control transmitter, and the high and low-pressure fire pump motors are linearly decelerated to a stop; Among them: During water supply, if the water supply pressure of the low-pressure water supply branch continues to exceed the set threshold, the speed of the high and low pressure fire pump motors will be reduced; The specific control method of the high-pressure water supply mode is: Connect the water source to the main water inlet and select the high-pressure water supply mode through the wireless remote control transmitter; The PLC controller closes the electric control valve at the outlet of the low-pressure water supply branch, the electric control valve at the outlet of the high-pressure water supply branch, and the high-low pressure switching valve, and opens the electric control valve at the water inlet of the main line; Start the vacuum pump to suck water to the water inlet of the high and low pressure fire pumps, and shut down the vacuum pump when the negative pressure reaches the set value; Start the high and low pressure fire pump motors, control them to linearly increase to the rated speed within the set time, and open the high and low pressure switching valves and the electric control valve at the high pressure water supply branch outlet to supply water; After the water supply is completed, the high-pressure water supply mode is turned off through the wireless remote control transmitter, and the high and low pressure fire pump motors are linearly decelerated to a stop; Among them: During water supply, if the water supply pressure of the high-pressure water supply branch continues to exceed the set threshold, the speed of the high and low pressure fire pump motors will be reduced.

[0009] Furthermore, the water supply mode includes: a high- and low-pressure combined water supply mode; The specific control method of the high and low pressure combined water supply mode is: Connect the water source to the main water inlet, and select the high and low pressure combined water supply mode through the wireless remote control transmitter. The PLC controller closes the electric control valve at the outlet of the low-pressure water supply branch, the electric control valve at the outlet of the high-pressure water supply branch, and the high-low pressure switching valve, and opens the electric control valve at the water inlet of the main line; Start the vacuum pump to suck water to the water inlet of the high and low pressure fire pumps, and shut down the vacuum pump when the negative pressure reaches the set value; Start the high and low pressure fire pump motors, control them to linearly increase to the rated speed within the set time, and open the electric control valve of the low pressure water supply branch outlet, the electric control valve of the high pressure water supply branch outlet and the high and low pressure switching valve to supply water; After the water supply is completed, the high and low pressure combined water supply mode is turned off through the wireless remote control transmitter, and the high and low pressure fire pump motors are linearly decelerated to stop; Among them: During water supply, if the water supply pressure of the water supply pipeline continues to exceed the set threshold, the speed of the high and low pressure fire pump motors will be reduced.

[0010] Furthermore, the water supply mode includes: low pressure + portable pump water supply mode, The specific control method of the low pressure + portable pump water supply mode is: Place the portable pump in the water source, and connect the water outlet of the portable pump and the water inlet of the main pipeline with a pipe. Select the low pressure + portable pump water supply mode through the wireless remote control transmitter. The PLC controller closes the electric control valve and high-low pressure switching valve at the outlet of the low-pressure water supply branch, and opens the electric control valve at the water inlet of the main line and the electric control valve at the outlet of the low-pressure water supply branch; Start the portable pump to suck water to the water inlet of the high and low pressure fire pumps, and start the high and low pressure fire pump motors when it is detected that the water supply pressure of the main line is continuously greater than the first set value, and control the high and low pressure fire pump motors to linearly increase to the rated speed within the set time to supply water; After the water supply is completed, the low-pressure + portable pump water supply mode is turned off through the wireless remote control transmitter, the high and low pressure fire pump motors are linearly decelerated to stop, and the portable pump is turned off; Among them: during water supply, if the main line water supply pressure continues to be lower than the second set value, the high and low pressure fire pump motor speed will drop to the idle state; if the main line water supply pressure continues to be lower than the first set value, the high and low pressure fire pump motor will stop; If the water supply pressure in the water supply pipeline continuously exceeds the set threshold, the speed of the high and low pressure fire pump motors will be reduced.

[0011] Furthermore, the water supply mode includes: high pressure + portable pump water supply mode, The specific control method of the high pressure + portable pump water supply mode is: Place the portable pump in the water source, and connect the water outlet of the portable pump and the water inlet of the main pipeline with a pipe. Select the high pressure + portable pump water supply mode through the wireless remote control transmitter. The PLC controller closes the electric control valve at the outlet of the low-pressure water supply branch, and opens the electric control valve at the water inlet of the main line, the electric control valve at the outlet of the high-pressure water supply branch, and the high-low pressure switching valve; Start the portable pump to suck water to the water inlet of the high and low pressure fire pumps, and start the high and low pressure fire pump motors when it is detected that the water supply pressure of the main line is continuously greater than the first set value, and control the high and low pressure fire pump motors to linearly increase to the rated speed within the set time to supply water; After the water supply is completed, the high pressure + portable pump water supply mode is turned off through the wireless remote control transmitter, the high and low pressure fire pump motors are linearly decelerated to stop, and the portable pump is turned off; Among them: during water supply, if the main line water supply pressure continues to be lower than the second set value, the high and low pressure fire pump motor speed will drop to the idle state; if the main line water supply pressure continues to be lower than the first set value, the high and low pressure fire pump motor will stop; If the water supply pressure in the water supply pipeline continuously exceeds the set threshold, the speed of the high and low pressure fire pump motors will be reduced.

[0012] Furthermore, the water supply mode includes: high and low pressure + portable pump water supply mode, The specific control method of the high and low pressure + portable pump water supply mode is: Place the portable pump in the water source, connect the water outlet of the portable pump and the water inlet of the main line with a pipe, and select the high and low pressure + portable pump water supply mode through the wireless remote control transmitter; The PLC controller opens the electric control valve at the water inlet of the main line, the electric control valve at the water outlet of the low-pressure water supply branch, the electric control valve at the water outlet of the high-pressure water supply branch, and the high-low pressure switching valve; Start the portable pump to suck water to the water inlet of the high and low pressure fire pumps, and start the high and low pressure fire pump motors when it is detected that the water supply pressure of the main line is continuously greater than the first set value, and control the high and low pressure fire pump motors to linearly increase to the rated speed within the set time to supply water; After the water supply is completed, the high and low pressure + portable pump water supply mode is turned off through the wireless remote control transmitter, the high and low pressure fire pump motors are linearly decelerated to stop, and the portable pump is turned off; Among them: during water supply, if the main line water supply pressure continues to be lower than the second set value, the high and low pressure fire pump motor speed will drop to the idle state; if the main line water supply pressure continues to be lower than the first set value, the high and low pressure fire pump motor will stop; If the water supply pressure in the water supply pipeline continuously exceeds the set threshold, the speed of the high and low pressure fire pump motors will be reduced.

[0013] Furthermore, depending on the water supply mode, the water intake depth ranges from 0m to ≤15m, the horizontal water supply distance ranges from 0km to ≤19km, and the water supply flow rate ranges from 15L / s to 130L / s; The water supply pressure of the high-pressure water supply branch is 4 MPa, and the water supply pressure of the low-pressure water supply branch is 1 MPa.

[0014] In a second aspect, the present invention provides a fire truck comprising the above-mentioned multi-mode water supply automatic control system, wherein the fire truck is used for remote water supply for forest fire fighting, emergency drainage of urban underground spaces, and water supply scenarios in remote areas.

[0015] Compared with the existing technology, the beneficial effects achieved by the present invention are: the present invention has the water intake mode of a vacuum pump and a portable pump, and can realize a variety of water supply modes in combination with high and low pressure fire pumps. By designing a multi-mode water supply operation control system, the water supply control and status monitoring of the multi-mode water supply operation are realized, which effectively ensures the reliability and stability of the water supply system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the control principle of the water supply system of the multi-mode fire truck of the present invention; Figure 2 Schematic diagram of the water supply system of the multi-mode fire truck of the present invention; Figure 3 Flowchart of the control strategy for the low-pressure water supply mode of the present invention; Figure 4 Flowchart of the control strategy for the low-pressure + portable pump water supply mode of the present invention. DETAILED DESCRIPTION

[0017] It should be noted that: The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0018] The term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " generally indicates an "or" relationship between the related objects. Example

[0019] like Figures 1 and 2An embodiment shown in FIG. 1 is a water supply system for a multi-mode fire truck, comprising: a main pipeline, a water supply pipeline, a suction vacuum pump 201 , high and low pressure fire pumps 409 , a PLC controller 2 , and a wireless remote control transmitter 4 ; A high and low pressure fire pump 409 is provided between the main pipe and the water supply pipe, and an electric control valve is provided at the water inlet of the main pipe and the water outlet of the water supply pipe; A vacuum pump 201 is provided on the main pipe; The water supply pipeline assembly includes a low-pressure water supply branch and a high-pressure water supply branch arranged in parallel, and a high-low pressure switching valve for switching the water supply mode is provided between the high-pressure water supply branch and the main pipeline; The vacuum pump 201 is used to extract the gas in the main pipe in front of the high and low pressure fire pump 409 to supply water; The high and low pressure fire pumps 409 are used to supply water to the high pressure water supply branch or the low pressure water supply branch according to the water supply mode; The wireless remote control transmitter 4 is used to remotely send the water supply mode instruction to the wireless remote control receiver 3. The wireless remote control receiver 3 is electrically connected to the PLC controller 2 via CAN, and sends the water supply mode instruction to the PLC controller 2; The PLC controller 2 is used to receive instructions on the water supply mode, control the working status of the electric control valve, high and low pressure switching valves, high and low pressure fire pumps and vacuum pumps, and realize automatic control of multiple water supply modes.

[0020] A vacuum pressure sensor 404 is provided on the main pipe, and the vacuum pressure sensor 404 is used to measure the water supply pressure of the main pipe; A first pressure sensor 405 and a first flow sensor 406 are provided on the low-pressure water supply branch, and the first pressure sensor 405 and the first flow sensor 406 are used to measure the water supply pressure and water supply flow at the outlet of the low-pressure water supply branch; A second pressure sensor 407 and a second flow sensor 408 are provided on the high-pressure water supply branch, and the second pressure sensor 407 and the second flow sensor 408 are used to measure the water supply pressure and water supply flow at the water outlet of the high-pressure water supply branch.

[0021] It also includes a display 1: used to display the water supply mode, the opening and closing status of valves such as the electric control valve and the high and low pressure switching valve, and the measurement data of the pressure sensor and the flow sensor.

[0022] The water supply mode in this embodiment adopts the low-pressure water supply mode: The specific control method of the low-pressure water supply mode is as follows: when the horizontal water supply distance is less than 4 km, before the water supply operation, use a water suction pipe to connect the water source to the main line water inlet valve 401 (the water inlet valve and water outlet valve are both electrically controlled valves), and use a water supply hose to connect the water supply pipeline low-pressure water outlet valve 501 to supply water to the fire point. Select the low-pressure water supply mode on the panel of the wireless remote control transmitter 4, and send the water supply mode to the wireless remote control receiver 3. The PLC controller 2 controls the low-pressure outlet valve 501 and the high-low pressure switching valve 403 of the water supply pipeline to close according to the water supply mode of the wireless remote control receiver 3, and opens the water inlet valve 401; Start the vacuum pump 201 to suck water to the water inlet of the main pipeline. During this process, the negative pressure detected by the vacuum pressure sensor 404 at the water inlet of the high and low pressure fire pumps 409 gradually increases until the detection switch 203 detects water coming out of the exhaust pipe of the vacuum pump 201. The vacuum pump 201 is automatically shut down, and the high and low pressure fire pump motors 102 are started at the same time. The low pressure water outlet valve 501 is opened and the high and low pressure fire pump motors 102 are controlled to increase linearly from 0 to the rated speed (default 2100 r / min) within 20 seconds. The speed of the high and low pressure fire pumps is driven to increase synchronously. The water supply flow rate can be increased to 130 L / s, the water supply pressure is 1 MPa, and the water intake depth is ≤3 m. If it is detected that the pressure value of the high and low pressure fire pump pressure sensor 405 is continuously greater than 160bar, the speed of the high and low pressure fire pump motor 102 will automatically decrease by 100r / min until the water supply pressure is lower than the set threshold; after the water supply operation is completed, the low pressure water supply mode is closed on the panel of the wireless remote control transmitter 4, and the PLC controller 2 controls the fire pump motor 102 to be closed, and controls the flow rate of the fire pump motor to linearly drop from the rated speed to 0 within 20s. Example

[0023] In addition to the technical solution of the water supply system of the multi-mode fire truck in Example 1, the water supply mode in this embodiment adopts a high-pressure water supply mode; The specific control method of the high-pressure water supply mode is as follows: when the horizontal water supply distance is less than 4 km, before the water supply operation, the water source is connected to the main line water inlet valve 401 with a water suction pipe, and the high-pressure water outlet valves 601 and 603 of the water supply pipeline are connected with a water supply hose to supply water to the fire point; Select the high-pressure water supply mode on the panel of the wireless remote control transmitter 4, and send the water supply mode to the wireless remote control receiver 3. The PLC controller 2 controls the low-pressure outlet valve 501 of the water supply pipeline, the high-pressure outlet valves 601 and 603 of the water supply pipeline, and the high- and low-pressure switching valve 403 to be closed according to the water supply mode of the wireless remote control receiver 3.

[0024] The vacuum pump 201 is controlled to start and suck water to the water inlet of the high and low pressure fire pumps. When the detection switch 203 detects water coming out of the exhaust pipe of the vacuum pump 201, the vacuum pump 201 is automatically shut down and the high and low pressure fire pump motors 102 are started at the same time. The high and low pressure switching valve 403 and the high pressure outlet valves 601 and 603 are opened. The fire pump motor 102 is controlled to increase linearly from 0 to the rated speed (default 2100 r / min) within 20 seconds. The speed of the high and low pressure fire pumps is driven to increase synchronously. The water supply flow rate can be increased to 30 L / s, the water supply pressure is 4 MPa, and the water intake depth is ≤ 3 m. If it is detected that the pressure value of the fire pump pressure sensor 405 is continuously greater than 160 bar, the speed of the high and low pressure fire pump motor 102 will automatically decrease by 100 r / min until the water supply pressure is lower than the set threshold; after the water supply operation is completed, the high pressure water supply mode will be turned off on the wireless remote control transmitter 4 panel, and the PLC controller 2 will control the high and low pressure fire pump motor 102 to be turned off, and the flow rate of the high and low pressure fire pump motor will be controlled to linearly decrease from the rated speed to 0 within 20 seconds. Example

[0025] In addition to the technical solution of the water supply system of the multi-mode fire truck in Example 1, the water supply mode in this embodiment adopts a high-low pressure combined water supply mode; The specific control method of the high-low pressure combined water supply mode is as follows: when the horizontal water supply distance is less than 4km, before the water supply operation, the water source is connected to the main line water inlet valve 401 with a suction pipe, and the water supply line high-pressure outlet valve 601 and the water supply line low-pressure outlet valve 501 are connected with water supply hoses to supply water to the fire point; Select the high and low pressure water supply mode on the panel of the wireless remote control transmitter 4, and send the water supply mode to the wireless remote control receiver 3. The PLC controller 2 controls the low pressure outlet valve 501, the high pressure outlet valves 601 and 603 of the water supply pipeline and the high and low pressure switching valve 403 to be closed according to the water supply mode of the wireless remote control receiver 3. Start the vacuum pump 201 to suck water to the main line water inlet 401. When the detection switch 203 detects water coming out of the exhaust pipe of the vacuum pump 201, the vacuum pump 201 is automatically shut down. At the same time, the high and low pressure fire pump motors 102 are started, the high and low pressure switching valves 403 and the high pressure water outlet valve 601 and the low pressure water outlet valve 501 are opened, and the high and low pressure fire pump motors 102 are controlled to increase linearly from 0 to the rated speed (default 2100 r / min) within 20 seconds. The speeds of the high and low pressure fire pumps are driven to increase synchronously, and the water supply operation can continue. The high pressure water supply flow rate of 4MPa is 25L / s, and the low pressure water supply flow rate of 1MPa is 65L / s. The water intake depth is ≤3m. If it is detected that the pressure value of the fire pump pressure sensor 405 is continuously greater than 160 bar, the speed of the high and low pressure fire pump motor 102 is automatically reduced by 100 r / min; After the water supply operation is completed, the high and low pressure combined water supply mode is selected to be turned off on the panel of the wireless remote control transmitter 4. The controller 02 controls the high and low pressure fire pump motors 102 to be turned off, and controls the flow rate of the high and low pressure fire pump motors to drop linearly from the rated speed to 0 within 20 seconds. Example

[0026] In addition to the technical solution of the water supply system of the multi-mode fire truck in Example 1, the water supply mode in this embodiment adopts the low pressure + portable pump water supply mode; The specific control method of the low-pressure + portable pump water supply mode is: when the horizontal water supply distance is less than 19 km, before the water supply operation, the portable pump 301 is connected to the water inlet valve 401 of the main line with a suction pipe, the portable pump 301 is placed in the water source, and the water supply hose is used to connect the low-pressure outlet valve 501 of the water supply pipeline to supply water to the fire point.

[0027] Select the low pressure + portable pump water supply mode on the panel of the wireless remote control transmitter 4, and send the water supply mode to the wireless remote control receiver 3. The PLC controller 2 controls the high pressure outlet valves 601 and 603 of the water supply pipeline and the high and low pressure switching valve 403 to be closed according to the water supply mode of the wireless remote control receiver 3; Control the main line water inlet valve 401 and the water supply line low-pressure outlet valve 501 to open, start the portable pump 301 to suck water to the main line water inlet valve 401, and automatically start the high and low pressure fire pump motors 102 when the pressure value of the vacuum pressure sensor 404 is detected to be greater than 0.1 bar for 5 seconds, and control the high and low pressure fire pump motors 102 to increase linearly from 0 to the rated speed (default 2100r / min) within 20 seconds; drive the high and low pressure fire pump speeds to increase synchronously, and the water supply operation can continue to work. The low pressure water supply flow rate is 130L / s, the water supply pressure is 1MPa, and the water depth is 2000r / min. Degree ≤ 11.5m; if it is detected that the pressure value of the high and low pressure fire pump pressure sensor 405 is continuously greater than 160bar, the speed of the high and low pressure fire pump motor 102 will automatically decrease by 100r / min until the water supply pressure is less than the set threshold; if it is detected that the pressure value of the vacuum pressure sensor 404 is continuously lower than 0.3bar (the second set value) within 5s, the speed of the high and low pressure fire pump motor 102 will automatically decrease to the idle state; if it is detected that the pressure value of the vacuum pressure sensor 404 is continuously lower than 0.1bar (the first set value) within 5s, the high and low pressure fire pump motor 102 will automatically stop running; After the water supply operation is completed, the low-pressure water supply mode is selected to be turned off on the panel of the wireless remote control transmitter 4. The controller 02 controls the high and low pressure fire pump motors 102 to be turned off, and controls the flow rate of the high and low pressure fire pump motors 102 to linearly drop from the rated speed to 0 within 20 seconds, and turns off the portable pump 301. Example

[0028] In addition to the technical solution of the water supply system of the multi-mode fire truck in Example 1, the water supply mode in this embodiment adopts the high-pressure + portable pump water supply mode; The specific control method of the high-pressure + portable pump water supply mode is as follows: when the horizontal water supply distance is less than 19 km, before the water supply operation, the portable pump 301 is connected to the main line water inlet valve 401 with a water suction pipe, the portable pump 301 is placed in the water source, and the water supply hose is connected to the high-pressure outlet valves 601 and 603 of the water supply pipeline to supply water to the fire point; Select the high pressure + portable pump water supply mode on the panel of the wireless remote control transmitter 4, and send the water supply mode to the wireless remote control receiver 3. The PLC controller 2 controls the low-pressure outlet valve 501 of the water supply pipeline to close according to the water supply mode of the wireless remote control receiver 3, and controls the main line water inlet valve 401, the high-pressure outlet valves 601 and 603 of the water supply pipeline, and the high and low pressure switching valve 403 to open.

[0029] The portable pump 301 is started to suck water to the high- and low-pressure fire pumps. When the pressure value of the vacuum pressure sensor 404 is detected to be continuously greater than 0.1 bar for 5 seconds, the high- and low-pressure fire pump motors 102 are automatically started and the high- and low-pressure fire pump motors 102 are controlled to linearly increase from 0 to the rated speed (default 2100 r / min) within 20 seconds. The speeds of the high- and low-pressure fire pumps are driven to increase synchronously, and the water supply operation can continue. The high-pressure water supply flow rate is 30 L / s, the water supply pressure is 4 MPa, and the water intake depth is ≤ 15 m. If it is detected that the pressure value of the fire pump pressure sensor 405 is continuously greater than 160 bar, the speed of the high and low pressure fire pump motor 102 will automatically be reduced by 100 r / min; if it is detected that the pressure value of the vacuum pressure sensor 404 is continuously lower than 0.3 bar (the second set value) within 5 seconds, the speed of the high and low pressure fire pump motor 102 will automatically drop to the idle state; if it is detected that the pressure value of the vacuum pressure sensor 404 is continuously lower than 0.1 bar (the first set value) within 5 seconds, the high and low pressure fire pump motor 102 will automatically stop running.

[0030] After the water supply operation is completed, the low-pressure water supply mode is selected to be turned off on the panel of the wireless remote control transmitter 4. The PLC controller 2 controls the high and low pressure fire pump motors 102 to be turned off, and controls the flow rate of the high and low pressure fire pump motors to linearly drop from the rated speed to 0 within 20 seconds, and turns off the portable pump 301. Example

[0031] In addition to the technical solution of the water supply system of the multi-mode fire truck in Example 1, the water supply mode in this embodiment adopts the high and low pressure + portable pump water supply mode; The specific control method of the high and low pressure + portable pump water supply mode is: when the horizontal water supply distance is less than 19 km, before the water supply operation, the portable pump 301 is connected to the main line water inlet valve 401 with a suction pipe, the portable pump 301 is placed in the water source, and the water supply line high pressure outlet valves 601 and 603 are connected with a water supply hose to supply water to the fire point.

[0032] Select high and low pressure + portable pump water supply mode on the panel of the wireless remote control transmitter 4, and send the water supply mode to the wireless remote control receiver 3. The PLC controller 2 controls the main line water inlet valve 401, the water supply line high pressure outlet valves 601, 603 and the high and low pressure switching valve 403 to open according to the water supply mode of the wireless remote control receiver 3.

[0033] The portable pump 301 is started to suck water to the high- and low-pressure fire pumps. When the pressure value of the vacuum pressure sensor 404 is detected to be continuously greater than 0.1 bar for 5 seconds, the high- and low-pressure fire pump motors 102 are automatically started and the high- and low-pressure fire pump motors 102 are controlled to linearly increase from 0 to the rated speed (default 2100 r / min) within 20 seconds. The speeds of the high- and low-pressure fire pumps are driven to increase synchronously, and the water supply operation can continue. The high-pressure water supply flow rate of 4MPa is 25L / s, and the low-pressure water supply flow rate of 1MPa is 65L / s. The water intake depth is ≤15m. If it is detected that the pressure value of the fire pump pressure sensor 405 is continuously greater than 160 bar, the speed of the high and low pressure fire pump motor 102 will automatically be reduced by 100 r / min; if it is detected that the pressure value of the vacuum pressure sensor 404 is continuously lower than 0.3 bar (the second set value) within 5 seconds, the speed of the high and low pressure fire pump motor 102 will automatically drop to the idle state; if it is detected that the pressure value of the vacuum pressure sensor 404 is continuously lower than 0.1 bar (the first set value) within 5 seconds, the high and low pressure fire pump motor 102 will automatically stop running.

[0034] After the water supply operation is completed, the low-pressure water supply mode is selected to be turned off on the panel of the wireless remote control transmitter 4. The controller 02 controls the high and low pressure fire pump motors 102 to be turned off, and controls the flow rate of the high and low pressure fire pump motors to linearly drop from the rated speed to 0 within 20 seconds, and turns off the portable pump 301. Example

[0035] This embodiment provides a fire truck, including the multi-mode water supply automatic control system of the above-mentioned embodiment 1, and the fire truck is used for remote water supply for forest fire fighting, emergency drainage of urban underground space and water supply scenarios in remote areas.

[0036] The present invention has water intake modes of a vacuum pump and a portable pump, and is combined with high and low pressure fire pumps to realize multiple water supply modes. By designing a multi-mode water supply operation control system, water supply control and status monitoring of multi-mode water supply operations are realized, effectively ensuring the reliability and stability of the water supply system operation.

[0037] After completing the pre-preparation for the water supply operation of the corresponding mode, the present invention controls the water supply system to automatically perform the water supply operation with one button, monitors the water supply operation status in real time, and improves the stability and reliability of the continuous operation of the multi-mode water supply system.

[0038] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all protected by the present invention.

Claims

1. A water supply system for a multi-mode fire truck, characterized in that: include: Main pipeline, water supply pipeline, suction vacuum pump, high and low pressure fire pump and PLC controller; A high and low pressure fire pump is provided between the main pipe and the water supply pipe, and an electric control valve is provided at the water inlet of the main pipe and the water outlet of the water supply pipe; A vacuum pump is provided on the main pipe; The water supply pipeline assembly includes a low-pressure water supply branch and a high-pressure water supply branch arranged in parallel, and a high-low pressure switching valve for switching the water supply mode is provided between the high-pressure water supply branch and the main pipeline; The vacuum pump is used to extract the gas in the main pipe in front of the high and low pressure fire pumps to supply water; The high and low pressure fire pumps include: for supplying water to the high pressure water supply branch or the low pressure water supply branch according to the water supply mode; The PLC controller is used to receive instructions on the water supply mode, control the working status of the electric control valve, high and low pressure switching valves, high and low pressure fire pumps and vacuum pumps, and realize automatic control of various water supply modes.

2. The water supply system of the multi-mode fire truck according to claim 1, characterized in that: A vacuum pressure sensor is provided on the main pipe, and the vacuum pressure sensor is used to measure the water supply pressure of the main pipe; A first pressure sensor and a first flow sensor are provided on the low-pressure water supply branch, and the first pressure sensor and the first flow sensor are used to measure the water supply pressure and water supply flow at the water outlet of the low-pressure water supply branch; A second pressure sensor and a second flow sensor are provided on the high-pressure water supply branch, and the second pressure sensor and the second flow sensor are used to measure the water supply pressure and water supply flow at the water outlet of the high-pressure water supply branch.

3. The water supply system of the multi-mode fire truck according to claim 2, characterized in that: Also includes: A portable pump is used to replace a vacuum pump to supply water to the main pipe in front of the high and low pressure fire pumps.

4. The water supply system of the multi-mode fire truck according to claim 2, characterized in that: The water supply mode includes a low-pressure water supply mode and a high-pressure water supply mode; The specific control method of the low-pressure water supply mode is: Connect the water source to the main water inlet, and select the low-pressure water supply mode through the wireless remote control transmitter. The PLC controller closes the electric control valve and high-low pressure switching valve at the outlet of the low-pressure water supply branch, and opens the electric control valve at the water inlet of the main line; Start the vacuum pump to suck water to the water inlet of the high and low pressure fire pumps, and shut down the vacuum pump when the negative pressure reaches the set value; Start the high and low pressure fire pump motors, control them to linearly increase to the rated speed within the set time, and open the electric control valve at the outlet of the low pressure water supply branch to supply water; After the water supply is completed, the low-pressure water supply mode is turned off through the wireless remote control transmitter, and the high and low-pressure fire pump motors are linearly decelerated to a stop; Among them: During water supply, if the water supply pressure of the low-pressure water supply branch continues to exceed the set threshold, the speed of the high and low pressure fire pump motors will be reduced until the water supply pressure is lower than the set threshold; The specific control method of the high-pressure water supply mode is: Connect the water source to the main water inlet and select the high-pressure water supply mode through the wireless remote control transmitter; The PLC controller closes the electric control valve at the outlet of the low-pressure water supply branch, the electric control valve at the outlet of the high-pressure water supply branch, and the high-low pressure switching valve, and opens the electric control valve at the water inlet of the main line; Start the vacuum pump to suck water to the water inlet of the high and low pressure fire pumps, and shut down the vacuum pump when the negative pressure reaches the set value; Start the high and low pressure fire pump motors, control them to linearly increase to the rated speed within the set time, and open the high and low pressure switching valves and the electric control valve at the high pressure water supply branch outlet to supply water; After the water supply is completed, the high-pressure water supply mode is turned off through the wireless remote control transmitter, and the high and low pressure fire pump motors are linearly decelerated to a stop; Among them: During water supply, if the water supply pressure of the high-pressure water supply branch continues to exceed the set threshold, the speed of the high and low pressure fire pump motors will be reduced until the water supply pressure is lower than the set threshold.

5. The water supply system of the multi-mode fire truck according to claim 2, characterized in that: The water supply modes include: high and low pressure combined water supply mode; The specific control method of the high and low pressure combined water supply mode is: Connect the water source to the main water inlet, and select the high and low pressure combined water supply mode through the wireless remote control transmitter. The PLC controller closes the electric control valve at the outlet of the low-pressure water supply branch, the electric control valve at the outlet of the high-pressure water supply branch, and the high-low pressure switching valve, and opens the electric control valve at the water inlet of the main line; Start the vacuum pump to suck water to the water inlet of the high and low pressure fire pumps, and shut down the vacuum pump when the negative pressure reaches the set value; Start the high and low pressure fire pump motors, control them to linearly increase to the rated speed within the set time, and open the electric control valve of the low pressure water supply branch outlet, the electric control valve of the high pressure water supply branch outlet and the high and low pressure switching valve to supply water; After the water supply is completed, the high and low pressure combined water supply mode is turned off through the wireless remote control transmitter, and the high and low pressure fire pump motors are linearly decelerated to stop; Among them: During water supply, if the water supply pressure of the water supply pipeline continues to exceed the set threshold, the speed of the high and low pressure fire pump motors will be reduced until the water supply pressure is lower than the set threshold.

6. The water supply system of the multi-mode fire truck according to claim 3, characterized in that: The water supply mode includes: low pressure + portable pump water supply mode, The specific control method of the low pressure + portable pump water supply mode is: Place the portable pump in the water source, and connect the water outlet of the portable pump and the water inlet of the main pipeline with a pipe. Select the low pressure + portable pump water supply mode through the wireless remote control transmitter. The PLC controller closes the electric control valve and high-low pressure switching valve at the outlet of the low-pressure water supply branch, and opens the electric control valve at the water inlet of the main line and the electric control valve at the outlet of the low-pressure water supply branch; Start the portable pump to suck water to the water inlet of the high and low pressure fire pumps, and start the high and low pressure fire pump motors when it is detected that the water supply pressure of the main line is continuously greater than the first set value, and control the high and low pressure fire pump motors to linearly increase to the rated speed within the set time to supply water; After the water supply is completed, the low-pressure + portable pump water supply mode is turned off through the wireless remote control transmitter, the high and low pressure fire pump motors are linearly decelerated to stop, and the portable pump is turned off; Among them: during water supply, if the main line water supply pressure continues to be lower than the second set value, the high and low pressure fire pump motor speed will drop to the idle state; if the main line water supply pressure continues to be lower than the first set value, the high and low pressure fire pump motor will stop; If the water supply pressure in the water supply pipeline continues to exceed the set threshold, the speed of the high and low pressure fire pump motors will be reduced until the water supply pressure is lower than the set threshold.

7. The water supply system of the multi-mode fire truck according to claim 3, characterized in that: The water supply mode includes: high pressure + portable pump water supply mode, The specific control method of the high pressure + portable pump water supply mode is: Place the portable pump in the water source, and connect the water outlet of the portable pump and the water inlet of the main pipeline with a pipe. Select the high pressure + portable pump water supply mode through the wireless remote control transmitter. The PLC controller closes the electric control valve at the outlet of the low-pressure water supply branch, and opens the electric control valve at the water inlet of the main line, the electric control valve at the outlet of the high-pressure water supply branch, and the high-low pressure switching valve; Start the portable pump to suck water to the water inlet of the high and low pressure fire pumps, and start the high and low pressure fire pump motors when it is detected that the water supply pressure of the main line is continuously greater than the first set value, and control the high and low pressure fire pump motors to linearly increase to the rated speed within the set time to supply water; After the water supply is completed, the high pressure + portable pump water supply mode is turned off through the wireless remote control transmitter, the high and low pressure fire pump motors are linearly decelerated to stop, and the portable pump is turned off; Among them: during water supply, if the main line water supply pressure continues to be lower than the second set value, the high and low pressure fire pump motor speed will drop to the idle state; if the main line water supply pressure continues to be lower than the first set value, the high and low pressure fire pump motor will stop; If the water supply pressure in the water supply pipeline continues to exceed the set threshold, the speed of the high and low pressure fire pump motors will be reduced until the water supply pressure is lower than the set threshold.

8. The water supply system of the multi-mode fire truck according to claim 3, characterized in that: The water supply modes include: high and low pressure + portable pump water supply mode, The specific control method of the high and low pressure + portable pump water supply mode is: Place the portable pump in the water source, connect the water outlet of the portable pump and the water inlet of the main line with a pipe, and select the high and low pressure + portable pump water supply mode through the wireless remote control transmitter; The PLC controller opens the electric control valve at the water inlet of the main line, the electric control valve at the water outlet of the low-pressure water supply branch, the electric control valve at the water outlet of the high-pressure water supply branch, and the high-low pressure switching valve; Start the portable pump to suck water to the water inlet of the high and low pressure fire pumps, and start the high and low pressure fire pump motors when it is detected that the water supply pressure of the main line is continuously greater than the first set value, and control the high and low pressure fire pump motors to linearly increase to the rated speed within the set time to supply water; After the water supply is completed, the high and low pressure + portable pump water supply mode is turned off through the wireless remote control transmitter, the high and low pressure fire pump motors are linearly decelerated to stop, and the portable pump is turned off; Among them: during water supply, if the main line water supply pressure continues to be lower than the second set value, the high and low pressure fire pump motor speed will drop to the idle state; if the main line water supply pressure continues to be lower than the first set value, the high and low pressure fire pump motor will stop; If the water supply pressure in the water supply pipeline continuously exceeds the set threshold, the speed of the high and low pressure fire pump motors will be reduced.

9. The water supply system of a multi-mode fire truck according to claim 2, characterized in that: Depending on the water supply mode, the water intake depth ranges from 0m to ≤15m, the horizontal water supply distance ranges from 0km to ≤19km, and the water supply flow rate ranges from 15L / s to 130L / s; The water supply pressure of the high-pressure water supply branch is 4 MPa, and the water supply pressure of the low-pressure water supply branch is 1 MPa.

10. A fire truck, characterized in that: The multi-mode water supply automatic control system comprises the multi-mode water supply automatic control system according to any one of claims 1 to 9, characterized in that the fire truck is used for remote water supply for forest fire fighting, emergency drainage of urban underground space and water supply scenarios in remote areas.

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