A water system of a jet pre-cooling device and its water supply control method

Abstract

This application belongs to the technical field of jet pre-cooling for aeroengines, and particularly relates to a water system for a jet pre-cooling device and its water supply control method. The water system of the jet pre-cooling device in this application uses a centrifugal variable-frequency water pump for water supply. The main water supply pipeline is divided into three water supply branches and two water return branches at the rear end of the variable-frequency water pump. The three water supply branches have the same pipe diameter and are respectively used for supplying water to the front water spray section, the middle water spray section, and the rear water spray section of the jet section. Each water supply branch has the same pressure and flow rate adjustment range. The multi-branch water supply scheme designed in this application, combined with the water supply control method, can significantly reduce the power consumption of the jet pre-cooling water system; can effectively broaden the flow rate adjustment range of the water system, enhance the working performance of the jet pre-cooling device, and ensure a good atomization effect within the full flow rate range; has a good collaborative emergency water cut-off function to ensure the safety of jet pre-cooling operations; and has the ability to carry out jet pre-cooling operations in winter.

Description

Technical Field

[0001] This application belongs to the technical field of jet pre-cooling technology for aero-engines, and particularly relates to a water system for a jet pre-cooling device and a water supply control method therefor. Background Art

[0002] The function of the water system of the jet pre-cooling device is to provide a water medium that meets certain jet flow rate, jet pressure, jet temperature, and cleanliness for the jet pre-cooling device. Whether the water system can work stably and reliably will have an important impact on the function of the jet pre-cooling device.

[0003] In the prior art, in the application of scenario analysis in the design of the jet pre-cooling water system scheme, by introducing scenario analysis technology, relatively complete functional indicators of the jet pre-cooling water system can be obtained. The designed water system has a flow regulation range of 0.5 kg / s to 2 kg / s and a water supply pressure of 0.5 MPa to 3 MPa; in the experimental study on the temperature drop and flow resistance characteristics of the jet pre-cooling device, by designing a water medium pressurization system, a water medium of 0.7 kg / s to 2.7 kg / s can be provided to the pre-cooling device. However, the prior art still has the following defects: The existing jet pre-cooling water systems generally adopt a single water supply branch and directly control the water flow by adjusting the water pressure, which will result in huge power consumption of the water system, far exceeding the limit requirements of the aircraft extraction power; due to the limitation of the extraction power, the flow rate and pressure regulation ranges of the existing jet pre-cooling water systems are generally small, the water pressure that can be provided is small, and it is impossible to provide enough water medium to the device and ensure a good atomization effect; the existing jet pre-cooling water systems do not have the ability to cooperate in emergency water cut-off, and the pressure buildup after water cut-off may damage the water pump; in addition, the existing jet pre-cooling water systems do not have anti / anti-icing measures and cannot carry out jet pre-cooling operations under cold conditions.

[0004] Therefore, it is desirable to have a technical solution to overcome or at least mitigate at least one of the above defects of the prior art. Summary of the Invention

[0005] The purpose of this application is to provide a water system for a jet pre-cooling device and a water supply control method therefor to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is as follows:

[0007] In a first aspect of this application, a water system for a jet pre-cooling device is provided. The jet pre-cooling device is provided with three water spraying sections along the intake direction, namely a front water spraying section, a middle water spraying section, and a rear water spraying section. The water system for the jet pre-cooling device includes:

[0008] A water supply main pipeline, the first end of the water supply main pipeline is connected to an electric heating water tank, and an electric ball valve and a centrifugal variable-frequency water pump are sequentially arranged on the water supply main pipeline from the first end to the second end;

[0009] The front water supply branch, the first end of the front water supply branch is connected to the second end of the water supply main pipeline, the second end of the front water supply branch is connected to the water supply pipeline corresponding to the front water spray section of the jet pre-cooling device, and a first electric control valve and a first electric stop valve are sequentially arranged on the front water supply branch from the first end to the second end;

[0010] The middle water supply branch, the first end of the middle water supply branch is connected to the second end of the water supply main pipeline, the second end of the middle water supply branch is connected to the water supply pipeline corresponding to the middle water spray section of the jet pre-cooling device, and a second electric control valve and a second electric stop valve are sequentially arranged on the middle water supply branch from the first end to the second end;

[0011] The rear water supply branch, the first end of the rear water supply branch is connected to the second end of the water supply main pipeline, the second end of the rear water supply branch is connected to the water supply pipeline corresponding to the rear water spray section of the jet pre-cooling device, and a third electric control valve and a third electric stop valve are sequentially arranged on the rear water supply branch from the first end to the second end;

[0012] The first return water branch, the first end of the first return water branch is connected to the electric heating water tank, the second end of the first return water branch is connected to the second end of the water supply main pipeline, and a fourth electric control valve is arranged on the first return water branch;

[0013] The second return water branch, the first end of the second return water branch is connected to the electric heating water tank, the second end of the second return water branch is connected to the second end of the water supply main pipeline, and a fourth electric stop valve is arranged on the second return water branch;

[0014] The drain pipeline, the first end of the drain pipeline is connected to the second end of the water supply main pipeline, and a manual ball valve is arranged on the drain pipeline;

[0015] The measurement unit is arranged on each pipeline;

[0016] The control unit is used to receive the measurement signals of each measurement unit and control each electric valve according to the measurement signals.

[0017] In at least one embodiment of the present application, a purge pipeline is further included. The first end of the purge pipeline is connected to the intake pipeline, the second end of the purge pipeline is connected to the water supply main pipeline upstream of the centrifugal variable-frequency water pump, and a filter pressure reducing valve and a fifth electric stop valve are sequentially arranged on the purge pipeline from the first end to the second end.

[0018] In at least one embodiment of the present application, the measurement unit includes a flow measurement unit, a pressure measurement unit, and a temperature measurement unit, wherein,

[0019] The flow measurement unit includes a plurality of flow meters respectively arranged on the main water supply pipeline, the front water supply branch, the middle water supply branch and the rear water supply branch;

[0020] The pressure measurement unit includes a plurality of pressure sensors respectively arranged on the main water supply pipeline, the front water supply branch, the middle water supply branch and the rear water supply branch;

[0021] The temperature measurement unit includes a temperature sensor arranged on the main water supply pipeline.

[0022] In at least one embodiment of the present application, a filter is further included, and the filter includes:

[0023] A 50μm filter arranged on the main water supply pipeline upstream of the centrifugal variable-frequency water pump, and a 30μm filter arranged on the main water supply pipeline downstream of the centrifugal variable-frequency water pump;

[0024] A first 10μm filter arranged on the front water supply branch downstream of the first electric stop valve;

[0025] A second 10μm filter arranged on the middle water supply branch downstream of the second electric stop valve;

[0026] A third 10μm filter arranged on the rear water supply branch downstream of the third electric stop valve.

[0027] In at least one embodiment of the present application, the fourth electric stop valve is associated with the first electric stop valve, the second electric stop valve and the third electric stop valve through the control unit. When the water supply is stopped emergently, the first electric stop valve, the second electric stop valve and the third electric stop valve are simultaneously controlled to close by the control unit, and the fourth electric stop valve is opened.

[0028] The second aspect of the present application provides a water supply control method for a jet pre-cooling device, based on the water system of the jet pre-cooling device as described above, including:

[0029] Realize the opening and flow distribution control of each spraying section through the control unit:

[0030] When the total water supply flow rate is or less, only the front spraying section is opened for spraying

[0031] When the total water supply flow rate is , the front spraying section and the middle spraying section are opened for spraying. During the continuous increase of the total water supply flow rate, the spraying flow rate of the front spraying section is maintained Remain unchanged. The water spraying flow rate of the middle water spraying section is the difference between the total water supply flow rate and the water spraying flow rate of the front water spraying section;

[0032] When the total water supply flow rate is within turn on the water spraying of the front water spraying section, the middle water spraying section, and the rear water spraying section. During the continuous increase of the total water supply flow rate, maintain the water spraying flow rates of the front water spraying section and the middle water spraying section unchanged. The water spraying flow rate of the rear water spraying section is the difference between the total water supply flow rate and the sum of the water spraying flow rates of the front water spraying section and the middle water supply section;

[0033] When the total water supply flow rate is at or above, keep the water spraying of the front water spraying section, the middle water spraying section, and the rear water spraying section. The water spraying flow rate of each water spraying section is

[0034] Among them, Q max is the maximum water supply capacity of the water system, and Q 总 is the total water supply flow rate.

[0035] The invention has at least the following beneficial technical effects:

[0036] For the water system of the jet pre-cooling device in this application,

[0037] a) Design a multi-branch water supply scheme. Combining with the water supply control method can significantly reduce the power consumption of the jet pre-cooling water system;

[0038] b) It can effectively broaden the flow regulation range of the water system, enhance the working performance of the jet pre-cooling device, and ensure a good atomization effect within the full flow range;

[0039] c) It has a good collaborative emergency water cut-off function to ensure the safety of jet pre-cooling operations;

[0040] d) It has both anti / anti-icing functions, making the jet pre-cooling device not restricted by environmental factors (temperature) and capable of carrying out jet pre-cooling operations in winter. Brief Description of the Drawings

[0041] Figure 1 is a schematic diagram of the water system of the jet pre-cooling device in an embodiment of this application;

[0042] Figure 2 is a water supply control flow chart of the jet pre-cooling device in an embodiment of this application.

[0043] Among them:

[0044] 1 - Electric heating water tank; 2 - Electric ball valve; 3 - 50μm filter; 4 - Fourth electric control valve; 5 - Fourth electric stop valve; 6 - Fourth flowmeter; 7 - Second flowmeter; 8 - First flowmeter; 9 - Second electric control valve; 10 - First electric control valve; 11 - Second electric stop valve; 12 - First electric stop valve; 13 - First 10μm filter; 14 - Second 10μm filter; 15 - Third 10μm filter; 16 - Third electric stop valve; 17 - Third electric control valve; 18 - Third flowmeter; 19 - Manual ball valve; 20 - 30μm filter; 21 - Centrifugal variable frequency water pump; 22 - Fifth electric stop valve; 23 - Filter pressure reducing valve. Detailed implementation mode

[0045] To make the purpose, technical solution and advantages of the implementation of this application clearer, the technical solution in the embodiments of this application will be described in more detail below in conjunction with the attached drawings in the embodiments of this application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The described embodiments are part of the embodiments of this application, rather than all of them. The embodiments described below by referring to the attached drawings are exemplary and are intended to explain this application and should not be construed as a limitation of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of this application. The embodiments of this application will be described in detail below in conjunction with the attached drawings.

[0046] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as a limitation of the scope of protection of this application.

[0047] The following combines the attached Figures 1 to 2 Make a further detailed description of this application.

[0048] The first aspect of this application provides a water system for a jet pre-cooling device. Among them, the jet pre-cooling device is provided with three water spraying sections along the air intake direction, namely the front water spraying section, the middle water spraying section and the rear water spraying section. The water system of the jet pre-cooling device of this application is used to supply water to the water supply pipelines corresponding to the three water spraying sections of the jet pre-cooling device.

[0049] Such as Figure 1As shown in the figure, the water system of the jet pre-cooling device includes a main water supply pipeline, three water supply branches, two water return branches, and a drainage pipeline. A purge pipeline is also preferably provided. In addition, it also includes a measurement unit provided on each pipeline, and a control unit for receiving the measurement signals of each measurement unit and controlling each electric valve according to the measurement signals.

[0050] Specifically, the first end of the main water supply pipeline is connected to the electric heating water tank 1. An electric ball valve 2 and a centrifugal variable-frequency water pump 21 are sequentially arranged on the main water supply pipeline from the first end to the second end. An electric heater is arranged at the bottom of the electric heating water tank 1. The electric heater is turned on before the start of winter operations to heat the pure water in the water tank.

[0051] The first end of the front water supply branch is connected to the second end of the main water supply pipeline. The second end of the front water supply branch is connected to the water supply pipeline corresponding to the front water spray section of the jet pre-cooling device. A first electric regulating valve 10 and a first electric stop valve 12 are sequentially arranged on the front water supply branch from the first end to the second end; the first end of the middle water supply branch is connected to the second end of the main water supply pipeline. The second end of the middle water supply branch is connected to the water supply pipeline corresponding to the middle water spray section of the jet pre-cooling device. A second electric regulating valve 9 and a second electric stop valve 11 are sequentially arranged on the middle water supply branch from the first end to the second end; the first end of the rear water supply branch is connected to the second end of the main water supply pipeline. The second end of the rear water supply branch is connected to the water supply pipeline corresponding to the rear water spray section of the jet pre-cooling device. A third electric regulating valve 17 and a third electric stop valve 16 are sequentially arranged on the rear water supply branch from the first end to the second end.

[0052] Furthermore, the first end of the first water return branch is connected to the electric heating water tank 1. The second end of the first water return branch is connected to the second end of the main water supply pipeline. A fourth electric regulating valve 4 is arranged on the first water return branch; the first end of the second water return branch is connected to the electric heating water tank 1. The second end of the second water return branch is connected to the second end of the main water supply pipeline. A fourth electric stop valve 5 is arranged on the second water return branch.

[0053] And, the first end of the drainage pipeline is connected to the second end of the main water supply pipeline. A manual ball valve 19 is arranged on the drainage pipeline. Among them, the manual ball valve 19 is arranged at the lowest point of the entire water system to facilitate draining the remaining water medium in the water system.

[0054] The first end of the purging pipeline is connected to the intake pipeline, and the second end of the purging pipeline is connected to the main water supply pipeline upstream of the centrifugal variable-frequency water pump 21. A filter pressure reducing valve 23 and a fifth electric stop valve 22 are sequentially arranged on the purging pipeline from the first end to the second end. The high-pressure gas from the process intake pipeline is reduced in pressure by the filter pressure reducing valve 23. After the jet pre-cooling test is completed, the fourth electric stop valve 5 is opened, and the process gas blows the water medium in the centrifugal variable-frequency water pump 21 and its subsequent pipeline out of the water system, preventing the water medium from freezing in the pipeline, so that the water system has both anti-icing and de-icing functions.

[0055] For the water system of the jet pre-cooling device of the present application, the centrifugal variable-frequency water pump 21 is used for water supply. The main water supply pipeline is divided into three water supply branches and two water return branches at the rear end of the variable-frequency water pump. The diameters of the three water supply branches are the same and are respectively used for water supply to the front water spraying section, the middle water spraying section, and the rear water spraying section of the jet section. Each water supply branch has the same pressure and flow regulation range. The two water return branches are respectively controlled by the fourth electric regulating valve 4 and the fourth electric stop valve 5. The fourth electric regulating valve 4 is mainly used to cooperate with the variable-frequency water pump to adjust the system pressure, and at the same time prevent the water temperature in the variable-frequency water pump from being too high and causing damage to the water pump in the state of no water supply or small-flow water supply.

[0056] In the preferred embodiment of the present application, the measurement unit includes a flow measurement unit, a pressure measurement unit, and a temperature measurement unit. The measurement unit is installed on each pipeline to monitor the jet flow rate, pressure, and temperature. Among them, the flow measurement unit includes a plurality of turbine flow meters respectively arranged on the main water supply pipeline, the front water supply branch, the middle water supply branch, and the rear water supply branch; the pressure measurement unit includes a plurality of pressure sensors respectively arranged on the main water supply pipeline, the front water supply branch, the middle water supply branch, and the rear water supply branch; the temperature measurement unit includes a temperature sensor arranged on the main water supply pipeline. In this embodiment, as Figure 1 shown, each flow meter includes a first flow meter 8 arranged on the front water supply branch upstream of the first electric regulating valve 10, a second flow meter 7 arranged on the middle water supply branch upstream of the second electric regulating valve 9, a third flow meter 18 arranged on the rear water supply branch upstream of the third electric regulating valve 17, and a fourth flow meter 6 arranged on the main water supply pipeline capable of measuring the total water supply flow rate of the three water supply branches. In addition, the layout of the pressure sensors and temperature sensors is detailed in Figure 1 , which will not be elaborated here.

[0057] In a preferred embodiment of the present application, filters are installed before and after the centrifugal variable-frequency water pump 21 and at the front end of the jet section. Among them, the filters at the rear of the pump and at the front end of the jet section should have a relatively high filtration accuracy and strong pressure-bearing capacity. Specifically, the filter includes a 50-μm filter 3 provided on the main water supply pipeline upstream of the centrifugal variable-frequency water pump 21, and a 30-μm filter 20 provided on the main water supply pipeline downstream of the centrifugal variable-frequency water pump 21; a first 10-μm filter 13 provided on the front water supply branch downstream of the first electric stop valve 12; a second 10-μm filter 14 provided on the middle water supply branch downstream of the second electric stop valve 11; and a third 10-μm filter 15 provided on the rear water supply branch downstream of the third electric stop valve 16.

[0058] In a preferred embodiment of the present application, the fourth electric stop valve 5 is associated with the first electric stop valve 12, the second electric stop valve 11, and the third electric stop valve 16 through a control unit. When an emergency occurs during the operation and emergency water supply stop is required, the first electric stop valve 12, the second electric stop valve 11, and the third electric stop valve 16 are simultaneously controlled by the control unit to close, and the fourth electric stop valve 5 is opened, so that the water system has the ability to cooperate in emergency water cut-off.

[0059] Based on the above jet pre-cooling device water system, the second aspect of the present application provides a method for controlling the water supply of a jet pre-cooling device, including:

[0060] Realize the opening and flow distribution control of each water spraying section through the control unit:

[0061] When the total water supply flow rate is or less, only the front water spraying section is opened for water spraying;

[0062] When the total water supply flow rate is , the front water spraying section and the middle water spraying section are opened for water spraying. During the continuous increase of the total water supply flow rate, the water spraying flow rate of the front water spraying section is maintained unchanged, and the water spraying flow rate of the middle water spraying section is the difference between the total water supply flow rate and the water spraying flow rate of the front water spraying section;

[0063] When the total water supply flow rate is , the front water spraying section, the middle water spraying section, and the rear water spraying section are opened for water spraying. During the continuous increase of the total water supply flow rate, the water spraying flow rates of the front water spraying section and the middle water spraying section are maintained unchanged, and the water spraying flow rate of the rear water spraying section is the difference between the total water supply flow rate and the sum of the water spraying flow rates of the front water spraying section and the middle water supply section;

[0064] When the total water supply flow rate is or more, keep the front water spraying section, the middle water spraying section, and the rear water spraying section spraying water, and the water spraying flow rate of each water spraying section is

[0065] Among them, Q max is the maximum water supply capacity of the water system, and Q 总 is the total water supply flow rate.

[0066] For the water supply control method of the jet pre-cooling device of this application, the three water spraying sections are opened and pressure-regulated respectively according to the total water supply flow rate, ensuring that the jet medium is continuously adjustable within the full flow range and has a good atomization effect. To achieve continuous adjustment of the water system within the full flow range, the newly opened water spraying section should gradually increase the opening degree of the regulating valve until it is fully opened during the opening process, and at the same time, cooperate with increasing the rotational speed drop of the centrifugal variable-frequency water pump 21 to avoid excessive fluctuations in the total water supply flow rate. Among the control variables, Q 总 is the total water supply flow rate, Q 前 is the water spraying flow rate of the front water spraying section, Q 中 is the water spraying flow rate of the middle water spraying section, Q 后 is the water spraying flow rate of the rear water spraying section, Q max is the maximum water supply capacity of the water system, and the maximum water supply capacity of all three water supply branches is

[0067] For the water supply control method of the jet pre-cooling device of this application, according to the debugging experience of the water system of the jet pre-cooling device, when the pressure of the current water supply branch reaches one-third of the pressure at the maximum water supply capacity of the water supply branch, that is, when the water spraying flow rate of the front water spraying section reaches , the water spraying of the middle water spraying section is opened; opening the water spraying of the middle water spraying section at this pressure is considered from two dimensions of ensuring the atomization effect and reducing the control complexity; similarly, when the total water supply flow rate reaches , the water spraying of the rear water spraying section is opened. It can be understood that the parameters involved above are only theoretical calculation values. Since there are deviations in the equivalent areas of each water supply branch during the processing and they are not the same, the specific parameters should be determined according to the actual debugging process.

[0068] For the water system of the jet pre-cooling device of this application, assuming that the flow coefficient of the nozzle is the same under different flow states and adopting a single-branch water supply scheme, to meet the basic atomization ability of a nozzle with a certain equivalent opening area, the working pressure required for the minimum water spraying amount is about 0.25 MPa. The maximum water spraying amount of this water system is 15 times that of the minimum water spraying amount. According to the formula calculation, the working pressures of the maximum water spraying amount and the minimum water spraying amount will differ by 225 times, and the working pressure at the maximum water spraying amount is about 57 MPa. According to the formula, the power consumption of the water system is proportional to the working pressure. When the water supply flow rate is constant, the greater the working pressure, the greater the power consumption.

[0069] The flow calculation formula for a thin-walled orifice is:

[0070]

[0071] Among them, Q is the flow rate (m 3 / s), Δp is the pressure difference before and after the orifice (Pa), A is the orifice area (m 2 ), ρ is the density of the fluid (Kg / m 3 ), and μ is the flow coefficient (take μ = 0.62);

[0072] The power consumption of the water system mainly comes from the water pump. The power consumption of other electrical components in the system is extremely small and can be ignored. Then the calculation formula for the power consumption of the water system is:

[0073]

[0074] Among them, N is the shaft power of the water pump (kW), Q Z is the water spray mass flow rate (kg / s), P is the working pressure (MPa), and η is the efficiency.

[0075] The water system of the jet pre-cooling device and its water supply control method of the present application adopt a wide-flow-domain multi-branch water supply design scheme. The flow rate and pressure of each branch of the water system can be adjusted separately. The front, middle, and rear water supply branches are sequentially opened according to the total water supply flow rate. The working pressure at the maximum water supply is only 6 MPa, which greatly reduces the power consumption of the water system and enables it to meet the power extraction limit requirements of the aircraft; it can significantly broaden the flow rate adjustment range of the water system, making it not restricted by the extracted power, and providing sufficient water supply pressure within the full flow range to ensure that the device has a good atomization effect; by associating and controlling the electric stop valves on the water supply pipeline and the water return pipeline, the water system has good coordinated emergency water cut-off ability to ensure that the working state of the water pump is not affected during the water cut-off process; a heating device and a purging pipeline are designed to enable the jet pre-cooling device to operate in winter.

[0076] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A water system for a jet pre-cooling device. The jet pre-cooling device is provided with three water spraying sections along the air inlet direction, namely a front water spraying section, a middle water spraying section and a rear water spraying section. It is characterized in that, The water system of the jet pre-cooling device includes: A main water supply pipeline, the first end of the main water supply pipeline is connected to the electric heating water tank (1), and an electric ball valve (2) and a centrifugal variable-frequency water pump (21) are sequentially arranged on the main water supply pipeline from the first end to the second end; A front water supply branch, the first end of the front water supply branch is connected to the second end of the main water supply pipeline, the second end of the front water supply branch is connected to the water supply pipeline corresponding to the front water spraying section of the jet pre-cooling device, and a first electric regulating valve (10) and a first electric stop valve (12) are sequentially arranged on the front water supply branch from the first end to the second end; An intermediate water supply branch, the first end of the intermediate water supply branch is connected to the second end of the main water supply pipeline, the second end of the intermediate water supply branch is connected to the water supply pipeline corresponding to the intermediate water spraying section of the jet pre-cooling device, and a second electric regulating valve (9) and a second electric stop valve (11) are sequentially arranged on the intermediate water supply branch from the first end to the second end; A rear water supply branch, the first end of the rear water supply branch is connected to the second end of the main water supply pipeline, the second end of the rear water supply branch is connected to the water supply pipeline corresponding to the rear water spraying section of the jet pre-cooling device, and a third electric regulating valve (17) and a third electric stop valve (16) are sequentially arranged on the rear water supply branch from the first end to the second end; A first return water branch, the first end of the first return water branch is connected to the electric heating water tank (1), the second end of the first return water branch is connected to the second end of the main water supply pipeline, and a fourth electric regulating valve (4) is arranged on the first return water branch; A second return water branch, the first end of the second return water branch is connected to the electric heating water tank (1), the second end of the second return water branch is connected to the second end of the main water supply pipeline, and a fourth electric stop valve (5) is arranged on the second return water branch; A drainage pipeline, the first end of the drainage pipeline is connected to the second end of the main water supply pipeline, and a manual ball valve (19) is arranged on the drainage pipeline; A measurement unit, the measurement unit is arranged on each pipeline; A control unit, the control unit is used to receive the measurement signals of each measurement unit and control each electric valve according to the measurement signals.

2. The water system of the jet pre-cooling device according to claim 1, characterized in that, It further includes a purging pipeline, the first end of the purging pipeline is connected to the intake pipeline, the second end of the purging pipeline is connected to the main water supply pipeline upstream of the centrifugal variable-frequency water pump (21), and a filter pressure reducing valve (23) and a fifth electric stop valve (22) are sequentially arranged on the purging pipeline from the first end to the second end.

3. The water system of the jet pre-cooling device according to claim 1, wherein The measurement unit includes a flow measurement unit, a pressure measurement unit, and a temperature measurement unit, wherein, The flow measurement unit includes a plurality of flow meters respectively arranged on the main water supply pipeline, the front water supply branch, the intermediate water supply branch, and the rear water supply branch; The pressure measurement unit includes a plurality of pressure sensors respectively arranged on the main water supply pipeline, the front water supply branch, the intermediate water supply branch, and the rear water supply branch; The temperature measurement unit includes a temperature sensor arranged on the main water supply pipeline.

4. The water system of the jet pre-cooling device according to claim 1, characterized in that, It further includes a filter, and the filter includes: A 50μm filter (3) provided on the main water supply pipeline upstream of the centrifugal variable-frequency water pump (21), and a 30μm filter (20) provided on the main water supply pipeline downstream of the centrifugal variable-frequency water pump (21); A first 10μm filter (13) provided on the front water supply branch downstream of the first electric stop valve (12); A second 10μm filter (14) provided on the intermediate water supply branch downstream of the second electric stop valve (11); A third 10μm filter (15) provided on the rear water supply branch downstream of the third electric stop valve (16).

5. The water system of the jet pre-cooling device according to claim 1, characterized in that, The fourth electric stop valve (5) is associated with the first electric stop valve (12), the second electric stop valve (11), and the third electric stop valve (16) through the control unit. When the water supply is stopped emergently, the first electric stop valve (12), the second electric stop valve (11), and the third electric stop valve (16) are simultaneously controlled by the control unit to close, and the fourth electric stop valve (5) is opened.

6. A water supply control method for a jet pre-cooling device, based on the water system of the jet pre-cooling device according to any one of claims 1 to 5, characterized in that, Comprising: The opening and flow distribution control of each water spray section are realized through the control unit: When the total water supply flow rate is or less, only the front water spray section is turned on for spraying; When the total water supply flow rate is within , the front water spray section and the middle water spray section start to spray water. During the continuous increase of the total water supply flow rate, the water spray flow rate of the front water spray section is maintained unchanged, and the water spray flow rate of the middle water spray section is the difference between the total water supply flow rate and the water spray flow rate of the front water spray section; When the total water supply flow rate is within , the front water spraying section, the middle water spraying section and the rear water spraying section start to spray water. During the continuous increase of the total water supply flow rate, the water spraying flow rates of the front water spraying section and the middle water spraying section are maintained unchanged, and the water spraying flow rate of the rear water spraying section is the difference between the total water supply flow rate and the sum of the water spraying flow rates of the front water spraying section and the middle water spraying section; When the total water supply flow rate is or above, the front water spray section, the middle water spray section, and the rear water spray section spray water, and the water spray flow rate of each water spray section is Among them, Q max is the maximum water supply capacity of the water system, and Q 总 is the total water supply flow rate.

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