Water supply system and water supply method for fuel gas generator

Abstract

The invention discloses a gas generator water supply system and a water supply method, and relates to the technical field of spacecrafts. An inlet of the variable-frequency water pump is connected with the water tank, an outlet of the variable-frequency water pump is connected with a water supply main pipeline, the water supply main pipeline is connected with a backflow pipeline, the backflow pipeline is provided with a backflow stop valve and a backflow adjusting valve, and the outlet end of the backflow pipeline is communicated with the water tank; the main valve is arranged on the water supply main pipeline and located on the downstream of the joint of the water supply main pipeline and the backflow pipeline, an outlet of the main valve is connected with a plurality of branch pipelines, and the branch pipelines are used for being connected with the fuel gas generators arranged side by side; according to the water supply system and the water supply method for the fuel gas generator, water flow can be rapidly supplied, and meanwhile the problem that irreversible damage to a water pump and a pipeline system is caused by huge water attack generated when a valve of the fuel gas generator is opened and closed is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of spacecraft, and particularly to a water supply system and a water supply method for a gas generator. Background Art

[0002] The gas generator of the high-altitude simulation ejector evacuation system of a liquid rocket engine needs to adopt a water supply system to provide a water source for generating gas, and the water supply system is also used to cool and protect the combustion chamber of the gas generator.

[0003] Since there are generally multiple gas generators arranged in parallel, a single water supply system cannot meet the requirements of multiple gas generators. Moreover, adopting multiple independent water supply systems will lead to problems such as complex systems and reduced reliability. Therefore, the same water supply system can be used to supply water to multiple gas generators.

[0004] In addition, when the same water supply system uses a water pump to supply water, due to the large water flow rate, it is difficult to quickly reach the required value. And if no specific adjustment method is adopted, the huge water hammer generated when the valve opens and closes will cause irreversible damage to the water pump and the pipeline system. Summary of the Invention

[0005] In view of this, the present invention provides a water supply system and a water supply method for a gas generator, which can not only ensure the rapid supply of water flow, but also solve the problem that the huge water hammer generated when the valve of the gas generator opens and closes will cause irreversible damage to the water pump and the pipeline system.

[0006] In a first aspect, the present invention provides a water supply system for a gas generator, including:

[0007] A water tank;

[0008] A variable-frequency water pump, the inlet of the variable-frequency water pump is connected to the water tank, the outlet of the variable-frequency water pump is connected to a main water supply pipeline, a return pipeline is connected to the main water supply pipeline, a return cut-off valve and a return regulating valve are provided on the return pipeline, and the outlet end of the return pipeline is communicated with the water tank;

[0009] A main valve, which is arranged on the main water supply pipeline and downstream of the connection with the return pipeline, and the outlet of the main valve is connected with a plurality of branch pipelines, and the plurality of branch pipelines are used to connect multiple gas generators arranged in parallel.

[0010] The water supply system of the gas generator provided by the present invention, when in use, can first close the main valve, and return the water output of the variable frequency water pump to the water tank through the return pipeline. In this return state, gradually adjust the water flow to the set value. Then open the main valve to switch the water flow to lead to multiple gas generators, thereby ensuring the water supply flow to multiple gas generators while avoiding the harm to the variable frequency water pump caused by suddenly increasing the frequency of the variable frequency water pump too high. Similarly, when the water supply stops, first switch the water flow to the return pipeline, and then gradually reduce the frequency of the variable frequency water pump during the return process, and finally stop the variable frequency water pump. Through the above settings, on the premise of meeting the requirements of water supply and water cut-off for the gas generator, the problem that the huge water hammer generated when the valve of the gas generator opens and closes will cause irreversible damage to the water pump and the pipeline system is avoided, the rapid supply of water flow is ensured, and at the same time, the service life of the variable frequency water pump and the pipeline is improved.

[0011] Optionally, a filter and a water outlet valve are provided at the outlet of the water tank. The filter is provided to filter impurities in the water to prevent clogging of the system pipeline and scratching of the valve. Through the setting of the water outlet valve, it is used to control the water outlet of the water tank.

[0012] Optionally, a first water discharge pipeline is connected to the inlet pipeline of the variable frequency water pump, and a first water discharge valve is provided on the first water discharge pipeline; through the setting of the first water discharge pipeline, it is used to empty the stored water in the export pipeline to avoid freezing of the stored water in the pipeline when the temperature is below zero, resulting in pipeline blockage during reuse.

[0013] A first purge pipeline is connected to the inlet pipeline of the variable frequency water pump, and a first purge valve is provided on the first purge pipeline. Through the setting of the first purge pipeline, it is used to purge the pipeline, and when cooperating with the first water discharge pipeline, it can be used to more cleanly empty the stored water in the pipeline.

[0014] Optionally, a second water discharge pipeline is connected to the outlet pipeline of the variable frequency water pump, and a second water discharge valve is provided on the second water discharge pipeline; through the setting of the second water discharge pipeline, it is used to empty the stored water in the export pipeline to avoid freezing of the stored water in the pipeline when the temperature is below zero, resulting in pipeline blockage during reuse.

[0015] A second purge pipeline is connected to the outlet pipeline of the variable frequency water pump, and a second purge valve is provided on the second purge pipeline. Through the second purge pipeline, it is used to purge the pipeline, and when cooperating with the second water discharge pipeline, it can be used to more cleanly empty the stored water in the pipeline.

[0016] Optionally, a third water discharge pipeline is connected to the return pipeline, and a third water discharge valve is provided on the third water discharge pipeline; through the setting of the third water discharge pipeline, it is used to empty the stored water in the export pipeline to avoid freezing of the stored water in the pipeline when the temperature is below zero, resulting in pipeline blockage during reuse.

[0017] A third purging pipeline is provided on the outlet pipeline of the main valve, and a third purging valve is provided on the third purging pipeline. The third purging pipeline is used to purge the pipeline, and at the same time, in cooperation with the third water discharging pipeline, it can be used to further empty the stored water in the pipeline.

[0018] Optionally, a first bellows is connected to the inlet of the variable-frequency water pump, and a first pressure detection device is connected to the upstream pipeline of the first bellows for measuring the pressure before the water pump;

[0019] The outlet of the variable-frequency water pump is connected to a second bellows, and a second pressure detection device is connected to the downstream pipeline of the second bellows for measuring the pressure after the water pump.

[0020] Through the settings of the first bellows and the second bellows, it is used to damp the vibration during the operation of the pump, thereby preventing damage to the system pipeline and the detection device and improving the service life of the system.

[0021] Optionally, a third pressure detection device is provided on the outlet pipeline of the main valve on the water supply main pipeline. Through the third pressure detection device, it can be used to measure the pipeline pressure.

[0022] Optionally, several of the branch pipelines are arranged symmetrically in pairs with respect to the water supply main pipeline, and a branch regulating valve is provided on the branch pipeline. One branch pipeline supplies water to one gas generator, and all the branch pipelines are arranged symmetrically in pairs, which can reduce the flow resistance difference of the branch pipelines and keep the flow resistance of each branch pipeline as consistent as possible. In addition, through the setting of the branch regulating valve, it can be used to adjust the flow rate of the branch pipeline, and by finely adjusting the opening of the branch regulating valve to balance the pipeline flow resistance of each branch pipeline. Since the branch pipelines cannot be completely symmetrical, there are differences in the flow resistance of each branch pipeline. To ensure that the water supply flow rates of each gas generator are the same, it is necessary to finely adjust the opening of the branch regulating valve to ensure the same flow resistance, thereby achieving the same flow rate of each branch pipeline.

[0023] In a second aspect, the present invention also provides a method for supplying water to a gas generator. The variable-frequency water pump is used to supply water to a plurality of gas generators arranged in parallel. The outlet of the variable-frequency water pump is connected to a water supply main pipeline, a return pipeline is connected to the water supply main pipeline, a return cut-off valve and a return regulating valve are provided on the return pipeline, a main valve is provided on the downstream of the water supply main pipeline at the connection with the return pipeline, and a plurality of branch pipelines are connected to the outlet section of the main valve. The gas generator is connected through the branch pipeline;

[0024] It includes a water supply step and a water stop step, and the water supply step includes:

[0025] Initial state: The valves on the main water supply pipeline and the return pipeline are all closed, and at least some of the valves on the branch pipelines are open;

[0026] Open the water outlet valve, the return cut-off valve and the return regulating valve;

[0027] Start the variable-frequency water pump and gradually increase the frequency of the variable-frequency water pump to the set value;

[0028] Adjust the return regulating valve to make the water flow reach the set value;

[0029] Open the main valve in sequence and close the return cut-off valve, instantly switching the water flow from flowing towards the return pipeline to flowing towards the branch pipeline;

[0030] The water cut-off step includes:

[0031] Open the return cut-off valve in sequence and close the main valve, instantly switching the water flow from flowing towards the branch pipeline to flowing towards the return pipeline;

[0032] Gradually reduce the frequency of the variable-frequency water pump, and finally close the variable-frequency water pump and other valves on the main water supply pipeline and the return pipeline.

[0033] The gas generator water supply method provided by the present invention can achieve fast and stable water supply and water cut-off by quickly switching between the main pipeline and the return pipeline, and by gradually increasing or gradually decreasing the frequency of the variable-frequency water pump, thus avoiding the problem that the huge water hammer generated when the valves of the gas generator are opened and closed will cause irreversible damage to the water pump and the pipeline system.

[0034] Optionally, a branch regulating valve is provided on the branch pipeline. During the water supply step, the flow rates of all branches are evenly adjusted through the branch regulating valve. With this setting, the consistency of the water supply flow rates of each gas generator is ensured.

[0035] The technical solution of the present invention has the following advantages: It can reduce the problem of water hammer, and can quickly supply water to multiple gas generators. Through system adjustment, the water flow rates of each path can be balanced, so as to stably supply the gas generators. Description of the Drawings

[0036] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 It is a water supply system diagram of an embodiment of the present invention for a gas generator.

[0038] Description of the reference numerals:

[0039] 1. Water tank; 2. Variable frequency water pump; 3. Main water supply pipeline; 4. Return pipeline; 5. Main valve; 6. Return cut-off valve; 7. Return regulating valve; 8. Branch pipeline; 9. Filter; 10. Outlet valve; 11. First drain pipeline; 12. First purge pipeline; 13. Second drain pipeline; 14. Second purge pipeline; 15. Check valve; 16. Valve behind the pump; 17. Third drain pipeline; 18. Third purge pipeline; 19. Flowmeter; 20. First bellows; 21. First pressure detection device; 22. Second bellows; 23. Second pressure detection device; 24. Third pressure detection device; 25. Branch regulating valve. Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] Such as Figure 1As shown in the figure, a specific implementation of the water supply system for a gas generator provided in this embodiment includes: a water tank 1 and a variable frequency water pump 2. The inlet of the variable frequency water pump 2 is connected to the water tank 1, the outlet of the variable frequency water pump 2 is connected to a main water supply pipeline 3, a return pipeline 4 is connected to the main water supply pipeline 3, a return cut-off valve 6 and a return regulating valve 7 are provided on the return pipeline 4, and the outlet end of the return pipeline 4 communicates with the water tank 1; during use, the water discharged from the variable frequency water pump 2 can be returned to the water tank 1 through the return pipeline 4.

[0045] As Figure 1 shown in the figure, a main valve 5 is provided on the main water supply pipeline 3, and the main valve 5 is located downstream of the connection with the return pipeline 4. When the main valve 5 is closed, the water discharged from the variable frequency water pump 2 is returned to the water tank 1 through the return pipeline 4. The outlet of the main valve 5 is connected to a plurality of branch pipelines 8, and the plurality of branch pipelines 8 are used to connect a plurality of gas generators arranged in parallel. When the main valve 5 is opened, a plurality of gas generators arranged in parallel are supplied with water simultaneously through the plurality of branch pipelines 8.

[0046] For the gas generator water supply system provided in this embodiment, during use, the main valve 5 can be closed first, and the water discharged from the variable frequency water pump 2 is returned to the water tank 1 through the return pipeline 4. In this return state, the water flow is gradually adjusted to the set value. Then the main valve 5 is opened, and the water flow is switched to lead to a plurality of gas generators, so as to ensure the water supply flow to a plurality of gas generators while avoiding the harm to the variable frequency water pump 2 caused by suddenly increasing the frequency of the variable frequency water pump 2 too high. Similarly, when the water supply stops, the water flow is first switched to the return pipeline 4, and then during the return process, the frequency of the variable frequency water pump 2 is gradually reduced, and finally the variable frequency water pump 2 is stopped, thereby improving the service life of the variable frequency water pump 2 on the premise of meeting the requirements for water supply and water cut-off to the gas generator.

[0047] As Figure 1 shown in the figure, in this embodiment, a filter 9 and a water outlet valve 10 are provided at the outlet of the water tank 1. Through the setting of the filter 9, it is used to filter impurities in the water to prevent clogging of the system pipeline and scratching of the valve. Through the setting of the water outlet valve 10, it is used to control the water outlet of the water tank 1.

[0048] As Figure 1 shown in the figure, in this embodiment, a first water discharge pipeline 11 is communicated with the inlet pipeline of the variable frequency water pump 2, and a first water discharge valve is provided on the first water discharge pipeline 11. Through the setting of the first water discharge pipeline 11, it is used to empty the stored water in the pipeline and improve the pipeline life.

[0049] A first purge pipeline 12 is connected to the inlet pipeline of the variable-frequency water pump 2, and a first purge valve is provided on the first purge pipeline 12. The first purge pipeline 12 is used to purge the pipeline, and at the same time, in cooperation with the first drain pipeline 11, it can be used to more cleanly empty the stored water in the pipeline. Specifically, nitrogen can be filled into the first purge pipeline 12 for purging.

[0050] As Figure 1 shown, in this embodiment, a second drain pipeline 13 is connected to the outlet pipeline of the variable-frequency water pump 2, and a second drain valve is provided on the second drain pipeline 13; through the setting of the second drain pipeline 13, it is used to empty the stored water in the pipeline and improve the pipeline life.

[0051] A second purge pipeline 14 is connected to the outlet pipeline of the variable-frequency water pump 2, and a second purge valve is provided on the second purge pipeline 14. The second purge pipeline 14 is used to purge the pipeline, and at the same time, in cooperation with the second drain pipeline 13, it can be used to further empty the stored water in the pipeline. Specifically, nitrogen can be filled into the second purge pipeline 14 for purging.

[0052] Specifically, as Figure 1 shown, in this embodiment, a check valve 15 and a post-pump valve 16 are sequentially provided at the outlet of the variable-frequency water pump 2, and the second purge pipeline 14 and the second drain pipeline 13 are connected to the outlet pipeline of the post-pump valve 16. The check valve 15 is used to prevent water from flowing back into the pump. It should be noted that in this embodiment, the variable-frequency water pump 2 adopts a high-efficiency and energy-saving centrifugal pump, and its motor adopts variable-frequency speed control, which can accurately adjust the speed and output flow of the water pump according to actual needs, so as to control the pressure and flow of water supply. Of course, the above description is not restrictive. In some alternative embodiments, the variable-frequency water pump 2 can also adopt pumps with other conventional structures.

[0053] As Figure 1 shown, in this embodiment, a third drain pipeline 17 is connected to the return pipeline 4, and a third drain valve is provided on the third drain pipeline 17; through the setting of the third drain pipeline 17, it is used to empty the stored water in the pipeline and improve the pipeline life. Specifically, in this embodiment, the third drain pipeline 17 is connected downstream of the return cut-off valve 6 and the return regulating valve 7 on the return pipeline 4.

[0054] As Figure 1As shown, in this embodiment, a third purge pipeline 18 is provided on the outlet pipeline of the main valve 5, and a third purge valve is provided on the third purge pipeline 18. The third purge pipeline 18 is used to purge the pipeline, and in cooperation with the third drain pipeline 17, it can be used to further empty the stored water in the pipeline. Specifically, nitrogen can be filled into the third purge pipeline 18 for purging.

[0055] As Figure 1 shown, in this embodiment, a flow meter 19 is provided upstream of the connection between the water supply main pipeline 3 and the return pipeline 4. Through the flow meter 19, the water flow in the water supply main pipeline 3 can be monitored in real time.

[0056] Specifically, the flow meter 19 is arranged downstream of the second purge pipeline 14 and the second drain pipeline 13, and upstream of the return water pipeline and the main valve 5.

[0057] Based on the above structure, when purging the pipeline, there are also the following methods:

[0058] First, open the second purge valve on the second purge pipeline 14, close the second drain valve on the second drain pipeline 13, and open the third drain valve on the third drain pipeline 17. When purging, make the purge gas pass through the flow meter 19 in the forward direction, so as to perform forward purging on the flow meter 19 and the residual water volume in the pipeline.

[0059] Second, open the third purge valve on the third purge pipeline 18, close the third drain valve on the third drain pipeline 17, and open the second drain valve on the second drain pipeline 13. When purging, make the purge gas pass through the flow meter 19 in the reverse direction, so as to perform reverse purging on the flow meter 19 and the residual water volume in the pipeline.

[0060] By alternately operating the above two purging methods, the purging effect on the flow meter 19 and the residual liquid in the pipeline can be further improved.

[0061] It should be noted that the present invention does not limit the number of the purge pipelines, and can be adaptively adjusted according to actual situations.

[0062] As Figure 1 shown, in this embodiment, a reflux cut-off valve 6 and a reflux regulating valve 7 are successively arranged on the return pipeline 4 along the water flow direction. During use, the water flow direction is changed through the reflux cut-off valve 6, and the water flow rate is gradually adjusted through the reflux regulating valve 7, so as to gradually make the water flow rate meet the requirements on the premise of meeting the frequency of the variable frequency water pump 2. The two are arranged successively along the water flow direction, so that the reflux cut-off valve 6 can quickly realize the on-off control of the water flow. After opening the reflux cut-off valve 6, the flow rate is finely adjusted through the reflux regulating valve 7, making the function of the return pipeline 4 more perfect and effective.

[0063] As Figure 1 shown, in this embodiment, the inlet of the variable-frequency water pump 2 is connected to a first bellows 20, and a first pressure detection device 21 is connected to the upstream pipeline of the first bellows 20; specifically, the first pressure detection device 21 can be a pressure gauge and / or a pressure sensor, and through the first pressure detection device 21, it can be used to measure the pipeline pressure. Moreover, through the setting of the first bellows 20, it is used for shock absorption during the operation of the pump to prevent damage to the system pipeline and the detection device.

[0064] As Figure 1 shown, in this embodiment, the outlet of the variable-frequency water pump 2 is connected to a second bellows 22, and a second pressure detection device 23 is connected to the downstream pipeline of the second bellows 22. Specifically, the second pressure detection device 23 can be a pressure gauge and / or a pressure sensor, and through the second pressure detection device 23, it can be used to measure the pipeline pressure. Moreover, through the setting of the second bellows 22, it is used for shock absorption during the operation of the pump to prevent damage to the system pipeline and the detection device.

[0065] As Figure 1 shown, in this embodiment, a third pressure detection device 24 is provided on the outlet pipeline of the main valve 5 on the water supply main pipeline 3. Specifically, the third pressure detection device 24 can be a pressure gauge and / or a pressure sensor, and through the third pressure detection device 24, it can be used to measure the pipeline pressure.

[0066] It should be noted that the present invention does not limit the number of the pressure detection devices, and can be adaptively adjusted according to the actual situation.

[0067] As Figure 1 shown, in this embodiment, a plurality of the branch pipelines 8 are arranged symmetrically in pairs with respect to the water supply main pipeline 3, and a branch pipeline regulating valve 25 is provided on the branch pipeline 8. Through this setting, one branch pipeline 8 supplies water to one gas generator, and all the branch pipelines 8 are arranged symmetrically in pairs, which can reduce the flow resistance difference of the branch pipelines 8 and keep the flow resistance of each branch pipeline 8 as consistent as possible.

[0068] Through the setting of the branch pipeline regulating valve 25, it can be used to adjust the flow rate of the branch pipeline 8. By finely adjusting the opening degree of the branch pipeline regulating valve 25 to balance the pipeline flow resistance of each branch pipeline 8. Since the branch pipelines 8 cannot be completely symmetrical, there are differences in the flow resistance of each branch pipeline 8. To ensure that the water supply flow rates of each gas generator are the same, it is necessary to finely adjust the opening degree of the branch pipeline regulating valve 25 to ensure the same flow resistance, so as to achieve the same flow rate of each branch pipeline 8.

[0069] In addition, this embodiment also provides a water supply method for a gas generator. Specifically, a variable-frequency water pump 2 is used to supply water to multiple gas generators arranged in parallel. The outlet of the variable-frequency water pump 2 is connected to a main water supply pipeline 3. A return pipeline 4 is connected to the main water supply pipeline 3. A return cut-off valve 6 and a return regulating valve 7 are provided on the return pipeline 4. A main valve 5 is provided downstream of the connection of the main water supply pipeline 3 to the return pipeline 4. A plurality of branch pipelines 8 are connected to the outlet section of the main valve 5, and the gas generators are connected through the branch pipelines 8.

[0070] It includes a water supply step and a water stop step. The water supply step includes:

[0071] Initial state: The valves on the main water supply pipeline 3 and the return pipeline 4 are all closed, and the valves on the branch pipelines 8 are all open. Of course, in some alternative embodiments, the valves on the branch pipelines 8 can also be partially open, depending on the specific working conditions.

[0072] Open the water outlet valve 10, the return cut-off valve 6 and the return regulating valve 7;

[0073] Start the variable-frequency water pump 2 and gradually increase the frequency of the variable-frequency water pump 2 to the set value;

[0074] Adjust the return regulating valve 7 to make the water flow rate reach the set value;

[0075] Operate the main valve 5 and the return cut-off valve 6 in sequence, open the main valve 5 and close the return cut-off valve 6 to instantly switch the water flow from flowing towards the return pipeline 4 to flowing towards the branch pipelines 8, that is, flowing towards the downstream of the main water supply pipeline 3.

[0076] Specifically, the time interval for operating the main valve 5 and the return cut-off valve 6 in sequence is about 0.1 s.

[0077] Through the above settings, the frequency of the variable-frequency water pump 2 can be gradually increased. Gradually increasing the frequency of the variable-frequency water pump 2 to the set value can smoothly increase the water supply pressure and flow rate, and avoid the impact on the system caused by sudden high pressure and large flow rate.

[0078] By adjusting the return regulating valve 7 to make the water flow rate reach the set value, precise control of the water supply flow rate is achieved, meeting the water use requirements of the system.

[0079] The sequential operation of the main valve 5 and the return cut-off valve 6, and the short time interval can quickly and smoothly achieve the switching of the water flow direction, ensuring that the water flows smoothly towards the branch pipelines 8 to supply water to the gas generators.

[0080] Further, during the water supply process, a branch pipeline regulating valve 25 is provided on the branch pipeline 8, and the flow rates on all branches are evenly regulated through the branch pipeline regulating valve 25, thereby ensuring the same water supply flow rate for multiple gas generators.

[0081] By regulating the flow rate of the branch pipeline 8 evenly through the branch pipeline regulating valve 25, it can ensure that multiple gas generators obtain the same water supply flow rate, so that they can operate under the same working conditions, improving the stability and consistency of the entire system.

[0082] Ensuring the same water supply flow rate helps to avoid failures or performance degradation of some gas generators due to insufficient water supply, and also prevents energy waste or other problems caused by excessive water supply to some gas generators.

[0083] The uniform distribution of the water supply flow rate helps to improve the overall working efficiency and lifespan of the gas generators, reducing the uneven equipment wear caused by flow rate differences.

[0084] The water cut-off steps include:

[0085] Operate the reflux cut-off valve 6 and the main valve 5 in sequence, open the reflux cut-off valve 6, and close the main valve 5 to instantaneously switch the water flow from flowing towards the branch pipeline 8 to flowing towards the reflux pipeline 4;

[0086] Specifically, the time interval for operating the reflux cut-off valve 6 and the main valve 5 in sequence is approximately 0.1 s. The sequential operation of the reflux cut-off valve 6 and the main valve 5, and the switching with a short time interval can quickly change the water flow direction, enabling the water flow to instantaneously switch from the branch pipeline 8 to the reflux pipeline 4, achieving a smooth transition during the water cut-off process.

[0087] Gradually reduce the frequency of the variable-frequency water pump 2, and finally close the variable-frequency water pump 2 and other valves on the water supply main pipeline 3 and the reflux pipeline 4.

[0088] Through the above settings, the frequency of the variable-frequency water pump 2 can be gradually reduced. Gradually reducing the frequency of the variable-frequency water pump 2 effectively reduces the sharp change in water flow caused by sudden shutdown, thereby reducing the intensity and harm of the water hammer phenomenon, and avoiding the problem of irreversible damage to the water pump and pipeline system caused by the huge water hammer generated when the valves of the gas generator open and close. The orderly operation of the entire water cut-off steps ensures the safety and stability of the system when it stops running.

[0089] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A gas generator water supply system, characterized in that: include: Water tank (1); A variable frequency water pump (2), wherein the inlet of the variable frequency water pump (2) is connected to the water tank (1), the outlet of the variable frequency water pump (2) is connected to a water supply main pipeline (3), the water supply main pipeline (3) is connected to a return pipeline (4), the return pipeline (4) is provided with a return cut-off valve (6) and a return regulating valve (7), and the outlet end of the return pipeline (4) is in communication with the water tank (1); A main valve (5) is arranged on the water supply main pipe (3) and is located downstream of the connection with the return pipe (4). The outlet of the main valve (5) is connected to a plurality of branch pipes (8), and the branch pipes (8) are used to connect a plurality of gas generators arranged in parallel.

2. The gas generator water supply system according to claim 1, characterized in that: The outlet of the water tank (1) is provided with a filter (9) and a water outlet valve (10).

3. The gas generator water supply system according to claim 1, characterized in that: The inlet pipe of the variable frequency water pump (2) is connected to a first water discharge pipe (11), and the first water discharge pipe (11) is provided with a first water discharge valve; The inlet pipe of the variable frequency water pump (2) is connected to a first purge pipe (12), and the first purge pipe (12) is provided with a first purge valve.

4. The gas generator water supply system according to claim 1, characterized in that: The outlet pipe of the variable frequency water pump (2) is connected to a second water discharge pipe (13), and the second water discharge pipe (13) is provided with a second water discharge valve; The outlet pipe of the variable frequency water pump (2) is connected to a second purge pipe (14), and the second purge pipe (14) is provided with a second purge valve.

5. The gas generator water supply system according to claim 1, characterized in that: The return pipe (4) is connected to a third drain pipe (17), and the third drain pipe (17) is provided with a third drain valve; A third purge pipeline (18) is provided on the outlet pipeline of the main valve (5), and a third purge valve is provided on the third purge pipeline (18).

6. The gas generator water supply system according to claim 1, characterized in that: The inlet of the variable frequency water pump (2) is connected to a first bellows (20), and the upstream pipeline of the first bellows (20) is connected to a first pressure detection device (21); The outlet of the variable frequency water pump (2) is connected to a second bellows (22), and the downstream pipeline of the second bellows (22) is connected to a second pressure detection device (23).

7. The gas generator water supply system according to claim 1, characterized in that: The water supply main pipeline (3) is provided with a third pressure detection device (24) on the outlet pipeline of the main valve (5).

8. The gas generator water supply system according to any one of claims 1 to 7, characterized in that: The plurality of branch pipes (8) are arranged symmetrically in pairs relative to the water supply main pipe (3), and the branch pipes (8) are provided with branch regulating valves (25).

9. A gas generator water supply method, characterized in that: A variable frequency water pump (2) is used to supply water to a plurality of gas generators arranged in parallel, wherein the outlet of the variable frequency water pump (2) is connected to a water supply main pipeline (3), the water supply main pipeline (3) is connected to a return pipeline (4), the return pipeline (4) is provided with a return cut-off valve (6) and a return regulating valve (7), the water supply main pipeline (3) is provided with a main valve (5) downstream of the connection with the return pipeline (4), the outlet section of the main valve (5) is connected to a plurality of branch pipelines (8), and the branch pipelines (8) are used to connect the gas generators; The method comprises a water supply step and a water cut-off step, wherein the water supply step comprises: Initial state: the valves on the water supply main pipe (3) and the return pipe (4) are all closed, and the valve on the branch pipe (8) is at least partially open; Open the water outlet valve (10), the reflux cut-off valve (6) and the reflux regulating valve (7); Starting the variable frequency water pump (2), and gradually increasing the frequency of the variable frequency water pump (2) to a set value; Adjust the reflux regulating valve (7) so that the water flow rate reaches the set value; The main valve (5) is opened and the reflux cut-off valve (6) is closed in sequence, so as to instantly switch the water flow from flowing toward the reflux pipe (4) to flowing toward the branch pipe (8); The water cut-off step comprises: The reflux cut-off valve (6) is opened and the main valve (5) is closed in sequence, so as to instantly switch the water flow from flowing toward the branch pipe (8) to flowing toward the reflux pipe (4); The frequency of the variable frequency water pump (2) is gradually reduced, and finally the variable frequency water pump (2) and other valves on the water supply main pipeline (3) and the return pipeline (4) are closed.

10. The gas generator water supply method according to claim 9, characterized in that: The branch pipeline (8) is provided with a branch regulating valve (25). In the water supply step, the flow rates on all branches are evenly regulated by the branch regulating valve (25).

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