1. A passenger roller ship low-temperature cooling water temperature control system is characterized by comprising a plurality of cooling sea water pumps, a central cooler, a three-way temperature control valve, a plurality of low-temperature cooling fresh water pumps and an automatic control system, wherein the cooling sea water pumps are arranged in parallel, the low-temperature cooling fresh water pumps are arranged in parallel, a water inlet of each cooling sea water pump is communicated with a sea water tank through a pipeline, a water outlet of each cooling sea water pump is communicated with a sea water inlet of the central cooler through a pipeline, a sea water outlet of the central cooler is respectively connected to the sea water tank and the outboard through pipelines, a cooling fresh water outlet of the three-way temperature control valve is communicated with a water inlet of the low-temperature cooling fresh water pump through a pipeline, a water outlet of a fresh water cooling system user is communicated with a water inlet of the low-temperature cooling fresh water system through a water return pipeline, and a high-temperature fresh water inlet of the central cooler is communicated with a water inlet of the low-temperature cooling fresh water system user through a return water pipeline, a low-temperature fresh water outlet of the central cooler is communicated with a low-temperature fresh water inlet of the three-way temperature control valve through a pipeline, and a branch pipeline is arranged on the water return pipeline and is communicated with a high-temperature fresh water inlet of the three-way temperature control valve; the pipeline between the three-way temperature control valve and the low-temperature cooling fresh water pump is provided with a first temperature sensor which is electrically connected with an automatic control system, the automatic control system is electrically controlled and connected with the three-way temperature control valve through a valve position opening sensor, and the automatic control system is electrically controlled and connected with the low-temperature cooling fresh water pump through an automatic PID controller.

2. The system according to claim 1, further comprising a three-way temperature control valve remote control panel, wherein the three-way temperature control valve remote control panel is disposed in the centralized control chamber and is electrically connected with the three-way temperature control valve, a second temperature sensor is disposed on a pipeline between the three-way temperature control valve and the cryogenic cooling fresh water pump, and the second temperature sensor is electrically connected with the three-way temperature control valve remote control panel.

3. The system for controlling the temperature of cryogenic cooling water of a ro-ro passenger ship according to claim 2, further comprising two three-way thermostat on-site control boxes, wherein the two three-way thermostat on-site control boxes are respectively provided with a left cabin and a right cabin of the ro-passenger ship; the three-way temperature control valve local control box is arranged in the engine room and is electrically controlled and connected with the three-way temperature control valve, a third temperature sensor is arranged on a pipeline between the three-way temperature control valve and the low-temperature cooling fresh water pump, and the third temperature sensor is electrically connected with the three-way temperature control valve local control box.

4. The system for controlling the temperature of cryogenic cooling water of a passenger rolling vessel according to claim 1, wherein when the temperature collected by the second temperature sensor is higher than a set temperature controlled by the three-way temperature control valve remote control board, the three-way temperature control valve remote control board controls the valve opening of the three-way temperature control valve on the side of the central cooler to increase; when the temperature collected by the second temperature sensor is lower than the set temperature, the opening degree of a valve of the three-way temperature control valve on one side of the central cooler is opened to the minimum, and simultaneously, all the cooling seawater pumps and the low-temperature cooling fresh water pumps run at the lowest rotating speed.

5. The system for controlling the temperature of cryogenic cooling water in a passenger rolling vessel according to claim 1, wherein when the temperature detected by the third temperature sensor is higher than the set temperature of the three-way thermostat on-site control box, the three-way thermostat on-site control box controls the valve opening of the three-way thermostat on the side of the central cooler to increase; when the temperature collected by the third temperature sensor is lower than the set temperature, the opening of the valve of the three-way temperature control valve on one side of the central cooler is opened to the minimum, and simultaneously, all the cooling seawater pumps and the low-temperature cooling fresh water pumps run at the lowest rotating speed.

6. The system of claim 1, wherein the automatic control system is provided with a temperature threshold value, and when the automatic control system receives a temperature higher than the temperature threshold value from the first temperature sensor and the opening degree of the three-way temperature control valve is 100%, the automatic control system controls the rotation speed of the cooling seawater pump to increase.

7. The system of claim 1, wherein the automatic control system controls the rotational speed of the cryogenic cooling fresh water pump to increase when the automatic control system receives from the first temperature sensor that the temperature is higher than the temperature threshold while the rotational speed of the cooling sea water pump is at the rated rotational speed.

8. The system as claimed in claim 1, wherein the sea chest includes a high ice area sea chest and a low sea chest, and the cooling sea water pump and the central cold area device are respectively communicated with the high ice area sea chest and the low sea chest; and a low-temperature fresh water expansion water tank is connected to a pipeline between the three-way temperature control valve and the low-temperature cooling fresh water pump through a side branch pipeline.

9. The system for controlling the temperature of cryogenic cooling water in a passenger roller boat according to claim 2, wherein the three-way temperature control valve remote control panel and the three-way temperature control valve local control box are respectively connected with two independent power supplies, and the two independent power supplies are taken from different branch boxes.

10. The system for controlling the temperature of cryogenic cooling water in a passenger rolling vessel according to claim 1, wherein the cooling seawater pump and the cryogenic cooling fresh water pump are variable frequency pumps.

Background

The low-temperature cooling water is used for cooling equipment such as a main engine room and an auxiliary engine room, the load change of the main engine room and the auxiliary engine room is large under different working conditions, the rotating speed of a traditional cooling sea pump and a low-temperature fresh water pump is constant, and the conveying amount of the cooling water cannot be changed along with the load change.

According to the traditional habit, the low-temperature cooling fresh water temperature controller is arranged in a centralized control room, so that the centralized operation and control of crews are facilitated. Consider that the passenger ship is under the safe condition of returning to port, if the centralized control room loses, the corresponding temperature controller control function loses. The temperature control valves of the left and right engine rooms lose temperature regulation control at the same time, and the safe port returning is affected.

Disclosure of Invention

In order to solve the technical problems, the invention provides a system for controlling the temperature of low-temperature cooling water of a ro-ro passenger ship, which meets the water temperature control of low-temperature cooling fresh water of the ro-ro passenger ship under the safe port returning working condition, realizes the cooperative control of a variable frequency pump and a temperature control valve, avoids logic disorder and achieves the purposes of energy conservation and consumption reduction.

In order to achieve the purpose, the invention adopts the following technical scheme:

a passenger roller ship low-temperature cooling water temperature control system is characterized by comprising a plurality of cooling sea water pumps, a central cooler, a three-way temperature control valve, a plurality of low-temperature cooling fresh water pumps and an automatic control system, wherein the cooling sea water pumps are arranged in parallel, the low-temperature cooling fresh water pumps are arranged in parallel, a water inlet of each cooling sea water pump is communicated with a sea water tank through a pipeline, a water outlet of each cooling sea water pump is communicated with a sea water inlet of the central cooler through a pipeline, a sea water outlet of the central cooler is respectively connected to the sea water tank and the outboard through pipelines, a cooling fresh water outlet of the three-way temperature control valve is communicated with a water inlet of the low-temperature cooling fresh water pump through a pipeline, a water outlet of a fresh water cooling system user is communicated with a water inlet of the low-temperature cooling fresh water system through a water return pipeline, and a high-temperature fresh water inlet of the central cooler is communicated with a water inlet of the low-temperature cooling fresh water system user through a return water pipeline, a low-temperature fresh water outlet of the central cooler is communicated with a low-temperature fresh water inlet of the three-way temperature control valve through a pipeline, and a branch pipeline is arranged on the water return pipeline and is communicated with a high-temperature fresh water inlet of the three-way temperature control valve; the pipeline between the three-way temperature control valve and the low-temperature cooling fresh water pump is provided with a first temperature sensor which is electrically connected with an automatic control system, the automatic control system is electrically controlled and connected with the three-way temperature control valve through a valve position opening sensor, and the automatic control system is electrically controlled and connected with the low-temperature cooling fresh water pump through an automatic PID controller.

Furthermore, the control system also comprises two three-way temperature control valve local control boxes, and the two three-way temperature control valve local control boxes are respectively provided with a left cabin and a right cabin of the ro-ro passenger ship; the three-way temperature control valve local control box is arranged in the engine room and is electrically controlled and connected with the three-way temperature control valve, a third temperature sensor is arranged on a pipeline between the three-way temperature control valve and the low-temperature cooling fresh water pump, and the third temperature sensor is electrically connected with the three-way temperature control valve local control box.

Further, when the temperature acquired by the second temperature sensor is higher than the set temperature, the three-way temperature control valve remote control board controls the opening degree of a valve of the three-way temperature control valve on one side of the central cooler to be increased until the temperature acquired by the second temperature sensor is equal to the set temperature; when the temperature collected by the second temperature sensor is lower than the set temperature, the opening degree of a valve of the three-way temperature control valve on one side of the central cooler is opened to the minimum, and simultaneously, all the cooling seawater pumps and the low-temperature cooling fresh water pumps run at the lowest rotating speed.

Further, when the temperature acquired by the third temperature sensor is higher than the set temperature, the three-way temperature control valve local control box controls the opening degree of a valve of the three-way temperature control valve on one side of the central cooler to be increased until the temperature acquired by the third temperature sensor is equal to the set temperature; when the temperature collected by the third temperature sensor is lower than the set temperature, the opening of the valve of the three-way temperature control valve on one side of the central cooler is opened to the minimum, and simultaneously, all the cooling seawater pumps and the low-temperature cooling fresh water pumps run at the lowest rotating speed.

Furthermore, the automatic control system is provided with a temperature threshold value, and when the automatic control system receives that the temperature received by the first temperature sensor is higher than the temperature threshold value and the opening degree of the three-way temperature control valve is 100%, the automatic control system controls the rotating speed of the cooling seawater pump to increase until the temperature collected by the first temperature sensor is equal to the set temperature.

Further, when the automatic control system receives that the temperature is higher than the temperature threshold value from the first temperature sensor and the rotating speed of the cooling seawater pump is the rated rotating speed, the automatic control system controls the rotating speed of the low-temperature cooling freshwater pump to increase until the temperature collected by the first temperature sensor is equal to the set temperature.

Further, the sea water tank comprises a high-level ice area sea water tank and a low-level sea water tank, and the cooling sea water pump and the central cold area device are respectively communicated with the high-level ice area sea water tank and the low-level sea water tank; and a low-temperature fresh water expansion water tank is connected to a pipeline between the three-way temperature control valve and the low-temperature cooling fresh water pump through a side branch pipeline.

Furthermore, the three-way temperature control valve remote control panel and the three-way temperature control valve local control box are respectively connected with two independent power supplies, and the two independent power supplies are taken from different distribution boxes.

Furthermore, the cooling sea water pump and the low-temperature cooling fresh water pump are both variable frequency pumps.

If the loads of the main engine, the auxiliary engine and the like are increased, the amount of the low-temperature cooling fresh water needs to be increased, the temperature of the low-temperature cooling fresh water rises, the three-way temperature control valve firstly increases the valve opening degree on one side of the central cooler under the control of a three-way temperature control valve remote control board or a three-way temperature control valve local control box until the valve opening degree is maximized so as to meet the water temperature requirement; if the opening degree of the three-way temperature control valve reaches the maximum and the temperature of the low-temperature cooling fresh water is still higher than the set temperature, the seawater cooling water pump increases the rotating speed and increases the discharge capacity of the seawater cooling water until the rotating speed is increased to the maximum; if the temperature of the low-temperature cooling fresh water is still higher than the set temperature, the automatic control system controls the low-temperature cooling fresh water pump to increase the rotating speed and increase the discharge capacity of the low-temperature cooling fresh water until the rotating speed is increased to the maximum rotating speed; the low-temperature cooling freshwater system and the cooling seawater pump system are independently designed at the left and right engine rooms, and the three-way valve temperature controllers in the centralized control room can perform centralized control on the engine room systems at the two sides during normal navigation; and an on-site temperature control valve control box is arranged on each engine room, and when the engine room returns to the port safely (if the centralized control room is lost), an on-site mode is selected, and the on-site temperature control box is used for realizing water temperature control. The AC230V power supplies of the remote temperature control valve control panel of the centralized control room and the local temperature control valve control panel of the engine room are independent power supplies and are taken from different distribution boxes, so that the simultaneous loss of fault power supplies is avoided. The temperature of the first temperature sensor automatically adjusts the opening of the three-way valve, and the flow distribution of the return water of a user of the low-temperature cooling fresh water system to the central cooler and the three-way temperature control valve is adjusted.

Compared with the prior art, the system for controlling the temperature of the low-temperature cooling water of the passenger roller ship has the following beneficial effects: the low-temperature cooling water pump, the cooling seawater pump and the three-way temperature control valve control the temperature of the low-temperature cooling fresh water system in a grading way, so that the energy-saving effect is obvious; the temperature control valve is controlled by the three-way temperature control valve local control box under the condition of safe port returning working condition (the centralized control room is lost).

Drawings

FIG. 1 is a schematic structural diagram of a low-temperature cooling water temperature control system of a passenger rolling vessel in a left cabin or a right cabin;

FIG. 2 is a control flow chart of the system for controlling the temperature of low-temperature cooling water of a passenger rolling vessel according to the invention under different sailing conditions.

The system comprises a cooling seawater pump 1, a central cooler 2, a three-way temperature control valve 3, a cryogenic cooling fresh water pump 4, an automatic control system 5, a three-way temperature control valve local control box 6, a three-way temperature control valve remote control board 7, a high-ice-zone seawater tank 8, a low-level seawater tank 9, a low-temperature cold-zone fresh water system user 10, a water return pipeline 11, a branch pipeline 12, a first temperature sensor 13, a second temperature sensor 14, a third temperature sensor 15, a centralized control room 16, a low-temperature fresh water expansion tank 17 and an outboard 18.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments. 36

As shown in fig. 1, a passenger roller ship low-temperature cooling water temperature control system comprises four cooling seawater pumps 1, two central coolers 2, two three-way temperature control valves 3, four low-temperature cooling fresh water pumps 4, two automatic control systems 5, two three-way temperature control valve local control boxes 6 and a three-way temperature control valve remote control panel 7, wherein the cooling seawater pumps 1 and the low-temperature cooling fresh water pumps 4 are both variable frequency pumps; four cooling seawater pumps 1, two central coolers 2, two three-way temperature control valves 3, four low-temperature cooling freshwater pumps 4, two automatic control systems 5 and two three-way temperature control valve local control boxes 6 are respectively and equally divided into two groups which are independently arranged in a left engine room and a right engine room, the cooling seawater pumps 1 in the left engine room and the right engine room are respectively arranged in parallel, the low-temperature cooling freshwater pumps 4 in the left engine room and the right engine room are respectively arranged in parallel, and water inlets of the cooling seawater pumps 1 are respectively communicated with a high-level ice area seawater tank 8 and a low-level seawater tank 9 through pipelines; the water outlet of the cooling sea water pump 1 is communicated with the sea water inlet of the central cooler 2 through a pipeline, the sea water outlet of the central cooler 2 is respectively connected with the sea water tank 8 of the high-level ice region, the low-level sea water tank 9 and the outboard 18 through pipelines, the cooling fresh water outlet of the three-way temperature control valve 3 is communicated with the water inlet of the low-temperature cooling fresh water pump 4 through a pipeline, the water outlet of the low-temperature cooling fresh water pump 4 is communicated with the water inlet of a low-temperature cooling fresh water system user 10 through a pipeline, the water outlet of the low-temperature cooling fresh water system user 10 is communicated with the high-temperature fresh water inlet of the central cooler 2 through a return pipeline 11, the low-temperature fresh water outlet of the central cooler 2 is communicated with the low-temperature fresh water inlet of the three-way temperature control valve 3 through a pipeline, and a branch pipeline 12 is arranged on the return pipeline 11 and is communicated with the high-temperature fresh water inlet of the three-way temperature control valve 3; a low-temperature fresh water expansion water tank 17 is connected to a pipeline between the three-way temperature control valve 3 and the low-temperature cooling fresh water pump 4 through a side branch pipeline; the water outlet of the low-temperature cooling fresh water pump 4 is communicated with the water inlet of a low-temperature cooling fresh water system user 10 through a pipeline, the water outlet of the low-temperature cooling fresh water system user 10 is communicated with the high-temperature fresh water inlet of the central cooler 2 through a water return pipeline 11, and a branch pipeline 12 communicated with the high-temperature fresh water inlet of the three-way temperature control valve 3 is arranged on the water return pipeline 11; the high-temperature fresh water outlet of the central cooler 2 is respectively connected to a high-level ice sea water tank 8, a low-level sea water tank 9 and an outboard 18 through pipelines; a first temperature sensor 13 is arranged on a pipeline between the three-way temperature control valve 3 and the low-temperature cooling fresh water pump 4, the first temperature sensor 13 is electrically connected with an automatic control system 5, the automatic control system 5 is electrically controlled and connected with the three-way temperature control valve 3 through a valve position opening sensor 19, and the automatic control system 5 is electrically controlled and connected with the cooling sea water pump 1 and the low-temperature cooling fresh water pump 4 through an automatic PID controller 20 respectively; the three-way temperature control valve remote control panel 7 and the three-way temperature control valve local control box 6 are respectively connected with two independent power supplies, and the two independent power supplies are taken from different distribution boxes; the three-way temperature control valve remote control panel 7 is arranged in the centralized control room 16, the three-way temperature control valve remote control panel 7 is electrically controlled and connected with the three-way temperature control valve 3, a second temperature sensor 14 is arranged on a pipeline between the three-way temperature control valve 3 and the low-temperature cooling fresh water pump 4, and the second temperature sensor 14 is electrically connected with the three-way temperature control valve remote control panel 7; the three-way temperature control valve in-situ control box is characterized in that the three-way temperature control valve in-situ control box 6 is electrically connected with the three-way temperature control valve 3, a third temperature sensor 15 is arranged on a pipeline between the three-way temperature control valve 3 and the low-temperature cooling fresh water pump 4, and the third temperature sensor 15 is electrically connected with the three-way temperature control valve in-situ control box 6.

As shown in fig. 2, when the passenger rolling vessel is in normal navigation, when the temperature collected by the second temperature sensor 14 is higher than the set temperature, the three-way temperature control valve remote control board 7 controls the opening of the three-way temperature control valve 3 on the side of the central cooler 2 to increase until the temperature collected by the second temperature sensor is equal to the set temperature; if the opening of the valve on one side of the central cooler 2 is 100%, the temperature of the low-temperature cooling fresh water is still higher than the set temperature, the automatic control system 5 controls the rotating speed of the cooling seawater pump 1 to increase until the temperature collected by the first temperature sensor 13 is equal to the set temperature; if the temperature of the low-temperature cooling fresh water is still higher than the set temperature until the rotating speed of the cooling sea water pump 1 is increased to the rated rotating speed, the automatic control system 5 controls the rotating speed of the low-temperature cooling fresh water pump to be increased until the temperature acquired by the first temperature sensor is equal to the set temperature.

When the return centralized control room of the passenger rolling ship is lost, when the temperature acquired by the third temperature sensor 15 is higher than the set temperature, the three-way temperature control valve local control box 6 controls the opening degree of the valve of the three-way temperature control valve 3 on one side of the central cooler 2 to be increased until the temperature acquired by the third temperature sensor is equal to the set temperature; if the opening of the valve on one side of the central cooler 2 is 100%, the temperature of the low-temperature cooling fresh water is still higher than the set temperature, the automatic control system 5 controls the rotating speed of the cooling seawater pump 1 to increase until the temperature collected by the first temperature sensor 13 is equal to the set temperature; if the temperature of the low-temperature cooling fresh water is still higher than the set temperature until the rotating speed of the cooling sea water pump 1 is increased to the rated rotating speed, the automatic control system 5 controls the rotating speed of the low-temperature cooling fresh water pump to be increased until the temperature acquired by the first temperature sensor is equal to the set temperature.

When the temperature collected by the second temperature sensor 14 or the third temperature sensor 15 is lower than the set temperature, the valve opening of the three-way temperature control valve 3 on one side of the central cooler 2 is opened to the minimum, and simultaneously, all the cooling seawater pump 1 and the low-temperature cooling fresh water pump 4 run at the lowest rotating speed

The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention should be regarded as the scope of the present invention to those skilled in the art.