A gas generator water supply system and a water supply method

Abstract

The application discloses a gas generator water supply system and a water supply method, and relates to the technical field of spacecrafts, wherein the gas generator water supply system comprises a water tank, a variable frequency water pump, a water supply main pipeline, a main valve, a plurality of branch pipelines and a plurality of gas generators. The inlet of the variable frequency water pump is connected with the water tank, the outlet of the variable frequency water pump is connected with the water supply main pipeline, the water supply main pipeline is connected with a backflow pipeline, the backflow pipeline is provided with a backflow cut-off valve and a backflow regulating valve, 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 downstream of the connection position with the backflow pipeline, the outlet of the main valve is connected with the plurality of branch pipelines, and the plurality of branch pipelines are used for connecting the plurality of gas generators arranged in parallel. The gas generator water supply system and the water supply method can ensure that water flow can be quickly supplied, and can avoid the problem that irreversible damage is caused to the water pump and the pipeline system by the great water hammer generated when the valve of the gas generator is opened and closed.

Description

Technical Field

[0001] This invention relates to the field of spacecraft technology, specifically to a gas generator water supply system and water supply method. Background Technology

[0002] The gas generator of the high-altitude simulated ejector evacuation system of a liquid rocket engine requires a water supply system to provide water for generating gas, and this water supply system also serves to cool and protect the combustion chamber of the gas generator.

[0003] Since there are often multiple gas generators, typically arranged in parallel, a single water supply system cannot meet their needs. Conversely, using multiple independent water supply systems would lead to system complexity and reduced reliability. Therefore, a single water supply system can be used to supply water to multiple gas generators.

[0004] Furthermore, when the same water supply system uses a water pump for water supply, the large water flow makes it difficult to quickly reach the required value. Moreover, without specific adjustment methods, the huge water hammer generated when the valve is opened and closed can cause irreversible damage to the water pump and pipeline system. Summary of the Invention

[0005] In view of this, the present invention provides a water supply system and method for a gas generator, which not only ensures a rapid water supply, but also solves the problem that the huge water hammer generated when the valve of the gas generator is opened and closed can cause irreversible damage to the water pump and pipeline system.

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

[0007] Water tank;

[0008] A variable frequency water pump, wherein 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 the main water supply pipeline, the main water supply pipeline is connected to the return pipeline, the return pipeline is equipped with a return shut-off valve and a return regulating valve, and the outlet end of the return pipeline is connected to the water tank.

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

[0010] The gas generator water supply system provided by this invention allows for the following steps: First, the main valve is closed, and the water output from the variable frequency pump is returned to the water tank via the return pipe. During this return flow, the water flow is gradually adjusted to the set value. Then, the main valve is opened, switching the water flow to multiple gas generators. This ensures a consistent water supply to all gas generators while preventing damage to the variable frequency pump caused by a sudden increase in pump frequency. Similarly, when the water supply is interrupted, the water flow is first switched to the return pipe, and then the frequency of the variable frequency pump is gradually reduced during the return flow until it stops. This design, while meeting the water supply and interruption requirements for the gas generators, avoids the irreversible damage to the pumps and piping system caused by the large water hammer generated when the gas generator valves are opened and closed. It ensures a rapid water supply and extends the service life of the variable frequency pumps and pipes.

[0011] Optionally, the water tank outlet is equipped with a filter and an outlet valve. The filter is used to remove impurities from the water, preventing blockage of system pipes and damage to valves. The outlet valve is used to control the water flow from the tank.

[0012] Optionally, the inlet pipe of the variable frequency water pump is connected to a first drain pipe, and the first drain pipe is equipped with a first drain valve; the first drain pipe is used to empty and discharge the water in the pipe to prevent the water in the pipe from freezing when the temperature is below zero, which would cause the pipe to become blocked when it is used again.

[0013] The inlet pipe of the variable frequency water pump is connected to a first purging pipe, and the first purging pipe is equipped with a first purging valve. The first purging pipe is used to purge the inside of the pipe, and when used in conjunction with the first drain pipe, it can be used to more thoroughly empty the water in the pipe.

[0014] Optionally, a second drain pipe is connected to the outlet pipe of the variable frequency water pump, and a second drain valve is provided on the second drain pipe; the second drain pipe is used to empty the water stored in the drain pipe to prevent the water in the pipe from freezing when the temperature is below zero, which would cause the pipe to become blocked when it is used again.

[0015] The outlet pipe of the variable frequency water pump is connected to a second purging pipe, which is equipped with a second purging valve. The second purging pipe is used to purge the inside of the pipe, and in conjunction with the second drain pipe, it can be used to more thoroughly empty the water in the pipe.

[0016] Optionally, a third drain pipe is connected to the return pipe, and a third drain valve is provided on the third drain pipe; the third drain pipe is used to empty the water stored in the drain pipe to prevent the water in the pipe from freezing when the temperature is below zero, which would cause the pipe to become blocked when it is used again.

[0017] The main valve's outlet pipe is equipped with a third purge pipe, and the third purge pipe is equipped with a third purge valve. This third purge pipe is used to purge the inside of the pipe, and in conjunction with the third drain pipe, it can be used to further empty the water remaining in the pipe.

[0018] Optionally, the inlet of the variable frequency water pump is connected to a first bellows, and a first pressure detection device is connected to the upstream pipe of the first bellows for measuring the pressure in front of 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 pipe of the second bellows to measure the pressure after the water pump.

[0020] The first and second bellows are designed to dampen vibrations during pump operation, thereby preventing damage to system pipelines and detection devices and extending the system's service life.

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

[0022] Optionally, several branch pipes are arranged symmetrically in pairs relative to the main water supply pipe, and each branch pipe is equipped with a branch regulating valve. One branch pipe supplies water to one gas generator. The symmetrical arrangement of all branch pipes in pairs reduces differences in flow resistance and maintains consistent flow resistance across all branch pipes. Furthermore, the branch regulating valves can be used to adjust the flow rate of each branch pipe. By fine-tuning the opening of the branch regulating valves, the flow resistance of each branch pipe can be balanced. Since the branch pipes cannot be perfectly symmetrical, their flow resistances differ. To ensure consistent water supply flow to each gas generator, the opening of the branch regulating valves needs to be fine-tuned to maintain consistent flow resistance, thereby achieving consistent flow rates across all branch pipes.

[0023] Secondly, the present invention also provides a water supply method for gas generators, wherein a variable frequency water pump supplies water to multiple gas generators arranged in parallel, 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 shut-off valve and a return regulating valve are provided on the return pipeline, a main valve is provided downstream of the connection between the main water supply pipeline and the return pipeline, and several branch pipelines are connected to the outlet section of the main valve, which are used to connect the gas generators;

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

[0025] Initial state: Valves on the main water supply pipe and return pipe are closed, and valves on the branch pipes are at least partially open;

[0026] Open the outlet valve, backflow shut-off valve, and backflow 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 reflux regulating valve to bring the water flow rate to the set value;

[0029] By sequentially opening the main valve and closing the backflow shut-off valve, the water flow is instantly switched from flowing toward the backflow pipe to flowing toward the branch pipe.

[0030] The water outage procedure includes:

[0031] By sequentially opening the backflow shut-off valve and closing the main valve, the water flow is instantly switched from flowing toward the branch pipe to flowing toward the backflow pipe.

[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 return pipeline.

[0033] The water supply method for a gas generator provided by this invention can achieve rapid and stable water supply and shutdown by quickly switching between the main pipeline and the return pipeline, and by gradually increasing or decreasing the frequency of the variable frequency water pump. This avoids the problem that the huge water hammer generated when the gas generator valve is opened and closed can cause irreversible damage to the water pump and pipeline system.

[0034] Optionally, a branch regulating valve is provided on the branch pipe. During the water supply step, the flow rate on all branches is adjusted to be uniform through the branch regulating valve. This setting ensures the consistency of the water supply flow rate for each gas generator.

[0035] The technical solution of this 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 of each channel can be balanced, thereby providing a stable supply to the gas generator. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

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

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Water tank; 2. Variable frequency water pump; 3. Main water supply pipeline; 4. Return pipeline; 5. Main valve; 6. Return shut-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. Post-pump valve; 17. Third drain pipeline; 18. Third purge pipeline; 19. Flow meter; 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

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

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] Furthermore, 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] like Figure 1The diagram illustrates a specific implementation of the gas generator water supply system provided in this embodiment, comprising: 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, and the outlet of the variable frequency water pump 2 is connected to a main water supply pipe 3. A return pipe 4 is connected to the main water supply pipe 3, and the return pipe 4 is equipped with a return shut-off valve 6 and a return regulating valve 7. The outlet end of the return pipe 4 is connected to the water tank 1. In use, the water output from the variable frequency water pump 2 can be returned to the water tank 1 through the return pipe 4.

[0045] like Figure 1 As shown, a main valve 5 is installed on the main water supply pipeline 3. The main valve 5 is located downstream of the connection point with the return pipeline 4. When the main valve 5 is closed, the water output from the variable frequency water pump 2 flows back to the water tank 1 through the return pipeline 4. Several branch pipelines 8 are connected to the outlet of the main valve 5. These branch pipelines 8 are used to connect multiple gas generators arranged in parallel. When the main valve 5 is opened, water is simultaneously supplied to the multiple gas generators arranged in parallel through the multiple branch pipelines 8.

[0046] The water supply system for the gas generators provided in this embodiment allows for the following steps: First, the main valve 5 is closed, and the water output from the variable frequency pump 2 is returned to the water tank 1 via the return pipe 4. During this return flow, the water flow is gradually adjusted to the set value. Then, the main valve 5 is opened, switching the water flow to multiple gas generators. This ensures a stable water supply to all gas generators while preventing damage to the variable frequency pump 2 from a sudden, excessive increase in its frequency. Similarly, when the water supply is interrupted, the water flow is first switched to the return pipe 4. During the return flow, the frequency of the variable frequency pump 2 is gradually reduced until it is completely stopped. This approach improves the service life of the variable frequency pump 2 while still meeting the water supply and interruption requirements for the gas generators.

[0047] like Figure 1 As shown, in this embodiment, the outlet of the water tank 1 is equipped with a filter 9 and a water outlet valve 10. The filter 9 is used to filter impurities in the water, preventing blockage of system pipes and damage to valves. The water outlet valve 10 is used to control the water flow from the water tank 1.

[0048] like Figure 1 As shown in this embodiment, the inlet pipe of the variable frequency water pump 2 is connected to a first drain pipe 11, and the first drain pipe 11 is equipped with a first drain valve. The first drain pipe 11 is used to empty the water stored in the pipe and improve the pipe's lifespan.

[0049] The inlet pipe of the variable frequency water pump 2 is connected to a first purging pipe 12, which is equipped with a first purging valve. The first purging pipe 12 is used to purge the inside of the pipe, and in conjunction with the first drain pipe 11, it can be used to more thoroughly empty the water remaining in the pipe. Specifically, the first purging pipe 12 can be filled with nitrogen gas for purging.

[0050] like Figure 1 As shown, in this embodiment, the outlet pipe of the variable frequency water pump 2 is connected to a second drain pipe 13, and the second drain pipe 13 is provided with a second drain valve; the second drain pipe 13 is used to empty the water in the pipe and improve the pipe life.

[0051] The outlet pipe of the variable frequency water pump 2 is connected to a second purging pipe 14, which is equipped with a second purging valve. The second purging pipe 14 is used to purge the inside of the pipe and, in conjunction with the second drain pipe 13, can be used to further empty the water remaining in the pipe. Specifically, the second purging pipe 14 can be filled with nitrogen gas for purging.

[0052] Specifically, such as Figure 1 As shown, in this embodiment, the outlet of the variable frequency water pump 2 is sequentially equipped with a check valve 15 and a post-pump valve 16. The second purge pipe 14 and the second drain pipe 13 are connected to the outlet pipe 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 is a high-efficiency and energy-saving centrifugal pump, and its motor adopts variable frequency speed control, which can accurately adjust the pump speed and output flow according to actual needs, thereby controlling the pressure and flow of the water supply. Of course, the above description is not limiting. In some alternative embodiments, the variable frequency water pump 2 can also be a pump with other conventional structures.

[0053] like Figure 1 As shown, in this embodiment, a third drain pipe 17 is connected to the return pipe 4, and a third drain valve is provided on the third drain pipe 17. The third drain pipe 17 is used to empty the water stored in the pipe and improve the pipe's lifespan. Specifically, in this embodiment, the third drain pipe 17 is connected downstream of the return shut-off valve 6 and the return regulating valve 7 on the return pipe 4.

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

[0055] like Figure 1 As shown, in this embodiment, a flow meter 19 is installed upstream of the connection point between the main water supply pipeline 3 and the return pipeline 4. This flow meter 19 allows for real-time monitoring of the water flow rate within the main water supply pipeline 3.

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

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

[0058] The first method involves opening the second purge valve on the second purge pipe 14, closing the second drain valve on the second drain pipe 13, and opening the third drain valve on the third drain pipe 17. During purging, the purging gas passes through the flow meter 19 in a forward direction, thereby purging the flow meter 19 and the residual water in the pipe.

[0059] The second method involves opening the third purge valve on the third purge pipe 18, closing the third drain valve on the third drain pipe 17, and opening the second drain valve on the second drain pipe 13. During purging, the purging gas is reversed and passes through the flow meter 19, thereby purging the flow meter 19 and the residual water in the pipe in reverse.

[0060] By alternating between the two purging methods described above, 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 purging pipes, and can be adjusted adaptively according to the actual situation.

[0062] like Figure 1 As shown in this embodiment, a backflow shut-off valve 6 and a backflow regulating valve 7 are sequentially arranged along the water flow direction on the backflow pipe 4. In use, the backflow shut-off valve 6 changes the water flow direction, and the backflow regulating valve 7 gradually adjusts the water flow rate, thereby gradually meeting the required water flow rate while satisfying the frequency of the variable frequency pump 2. The sequential arrangement of these two valves along the water flow direction allows the backflow shut-off valve 6 to quickly control the water flow, and the backflow regulating valve 7 to finely adjust the flow rate, making the function of the backflow pipe 4 more complete and effective.

[0063] like Figure 1 As 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 pipe of the first bellows 20. Specifically, the first pressure detection device 21 can be a pressure gauge and / or a pressure sensor, which can be used to measure the pipeline pressure. Furthermore, the first bellows 20 is used to dampen vibrations during pump operation, preventing damage to the system pipeline and the detection device.

[0064] like Figure 1 As 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 pipe of the second bellows 22. Specifically, the second pressure detection device 23 can be a pressure gauge and / or a pressure sensor, which can be used to measure the pipeline pressure. Furthermore, the second bellows 22 is used to dampen vibrations during pump operation, preventing damage to the system pipeline and the detection device.

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

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

[0067] like Figure 1 As shown, in this embodiment, several branch pipes 8 are arranged symmetrically in pairs relative to the main water supply pipe 3, and each branch pipe 8 is equipped with a branch regulating valve 25. With this arrangement, one branch pipe 8 supplies water to one gas generator, and the symmetrical arrangement of all branch pipes 8 in pairs can reduce the difference in flow resistance between the branch pipes 8 and keep the flow resistance of each branch pipe 8 as consistent as possible.

[0068] The branch regulating valve 25 can be used to regulate the flow rate of the branch pipe 8. By fine-tuning the opening of the branch regulating valve 25, the flow resistance of each branch pipe 8 can be balanced. Since the branch pipes 8 cannot be completely symmetrical, the flow resistance of each branch pipe 8 is different. To ensure that the water supply flow of each gas generator is consistent, it is necessary to fine-tune the opening of the branch regulating valve 25 to ensure consistent flow resistance, thereby achieving consistent flow rate of each branch pipe 8.

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

[0070] It includes a water supply step and a water outage step, wherein the water supply step includes:

[0071] Initial state: Valves on the main water supply pipe 3 and the return pipe 4 are all closed, while valves on the branch pipe 8 are all open. Of course, in some alternative embodiments, the valves on the branch pipe 8 may also be partially open, depending on the specific operating conditions.

[0072] Open the outlet valve 10, the backflow shut-off valve 6, and the backflow 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 backflow regulating valve 7 to bring the water flow rate to the set value;

[0075] The main valve 5 and the backflow shut-off valve 6 are operated in sequence. The main valve 5 is opened and the backflow shut-off valve 6 is closed, so that the water flow is instantly switched from flowing towards the backflow pipe 4 to flowing towards the branch pipe 8, that is, flowing towards the downstream of the main water supply pipe 3.

[0076] Specifically, the time interval between operating the main valve 5 and the reflux shut-off valve 6 in sequence is approximately 0.1 seconds.

[0077] With the above settings, the frequency of the variable frequency water pump 2 can be gradually increased to the set value, which can smoothly increase the water supply pressure and flow rate, and avoid sudden high pressure and high flow rate from impacting the system.

[0078] By adjusting the reflux regulating valve 7 to achieve the set value of water flow, precise control of water supply flow is realized to meet the water demand of the system.

[0079] The sequential operation of the main valve 5 and the return shut-off valve 6, with a short time interval, can quickly and smoothly switch the water flow direction, ensuring that the water flows smoothly to the branch pipe 8 to supply water to the gas generator.

[0080] Furthermore, during the water supply process, branch pipe 8 is equipped with a branch regulating valve 25, which regulates the flow rate on all branches to ensure uniformity. This ensures consistent water supply flow to multiple gas generators.

[0081] By regulating the flow rate of branch pipe 8 with branch regulating valve 25, it is possible to ensure that multiple gas generators receive the same water supply flow rate, thereby enabling them to operate under the same working conditions and improving the stability and consistency of the entire system.

[0082] Ensuring a consistent water flow helps prevent some gas generators from malfunctioning or experiencing performance degradation due to insufficient water supply, while also preventing some gas generators from wasting energy or causing other problems due to excessive water supply.

[0083] Uniform water flow distribution helps improve the overall efficiency and lifespan of the gas generator and reduces uneven equipment wear caused by flow differences.

[0084] The water outage procedure includes:

[0085] The backflow shut-off valve 6 and the main valve 5 are operated in sequence to open the backflow shut-off valve 6 and close the main valve 5, so as to instantly switch the water flow from flowing toward the branch pipe 8 to flowing toward the backflow pipe 4.

[0086] Specifically, the time interval between sequentially operating the backflow shut-off valve 6 and the main valve 5 is approximately 0.1 seconds. The sequential operation of the backflow shut-off valve 6 and the main valve 5, with a short time interval between switching, can quickly change the water flow direction, allowing the water flow to instantly switch from the branch pipe 8 to the backflow pipe 4, thus achieving a smooth transition during the water outage process.

[0087] The frequency of the variable frequency water pump 2 is gradually reduced, and finally the other valves on the variable frequency water pump 2, the main water supply pipeline 3, and the return pipeline 4 are closed.

[0088] By implementing the above settings, the frequency of the variable frequency water pump 2 can be gradually reduced. This gradual reduction effectively minimizes the drastic changes in water flow caused by sudden shutdowns, thereby reducing the intensity and severity of water hammer and preventing irreversible damage to the pump and piping system caused by the massive water hammer generated when the gas generator valve is opened or closed. The orderly operation of the entire water shutdown process ensures the safety and stability of the system during shutdown.

[0089] Although 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 water supply system for a gas generator, characterized by It comprises: a water tank (1); a variable frequency water pump (2), the inlet of which is connected with the water tank (1), and the outlet of which is connected with a water supply main pipeline (3), the water supply main pipeline (3) is connected with a backflow pipeline (4), the backflow pipeline (4) is provided with a backflow cut-off valve (6) and a backflow regulating valve (7), the backflow cut-off valve (6) is used for controlling the on-off of the backflow pipeline (4), the backflow regulating valve (7) is used for regulating the water flow in the backflow pipeline (4), the pre-regulation of the water flow in the water supply main pipeline (3) is realized through the cooperation of the backflow cut-off valve (6) and the backflow regulating valve (7), and the outlet end of the backflow pipeline (4) is communicated with the water tank (1); a main valve (5) arranged on the water supply main pipeline (3) and located downstream of the connection position with the backflow pipeline (4), the outlet of the main valve (5) is connected with a plurality of branch pipelines (8), and the branch pipelines (8) are used for connecting a plurality of parallel arranged gas generators; the branch pipelines (8) are arranged symmetrically in pairs with respect to the water supply main pipeline (3), and the branch pipelines (8) are provided with branch regulating valves (25); the variable frequency water pump (2) changes the output flow by gradually adjusting the frequency, the water flow in the water supply main pipeline (3) is pre-regulated to a set value through the cooperation of the backflow regulating valve (7), and then the water flow direction is switched to the branch pipelines (8) through the switching of the main valve (5) and the backflow cut-off valve (6).

2. A gas generator water supply system according to claim 1, characterised 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 by The inlet pipeline of the variable frequency water pump (2) is communicated with a first water drainage pipeline (11), and the first water drainage pipeline (11) is provided with a first water drainage valve; The inlet pipeline of the variable frequency water pump (2) is communicated with a first purging pipeline (12), and the first purging pipeline (12) is provided with a first purging valve.

4. The gas generator water supply system according to claim 1, characterized by The outlet pipeline of the variable frequency water pump (2) is communicated with a second water drainage pipeline (13), and the second water drainage pipeline (13) is provided with a second water drainage valve; The outlet pipeline of the variable frequency water pump (2) is communicated with a second purging pipeline (14), and the second purging pipeline (14) is provided with a second purging valve.

5. The gas generator water supply system according to claim 1, wherein The backflow pipeline (4) is communicated with a third water drainage pipeline (17), and the third water drainage pipeline (17) is provided with a third water drainage valve; The outlet pipeline of the main valve (5) is provided with a third purging pipeline (18), and the third purging pipeline (18) is provided with a third purging valve.

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

7. The gas generator water supply system according to claim 1, wherein 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. A method of supplying water to a gas generator, characterized by The gas generator water supply system of any one of claims 1-7 is adopted; The water supply step comprises: Initial state: the valves on the main water pipe (3) and the return pipe (4) are closed, and the valves on the branch pipes (8) are at least partially open; Open the water outlet valve (10), the return cut-off valve (6) and the return regulating valve (7); Start the variable frequency water pump (2) and gradually increase the frequency of the variable frequency water pump (2) to a set value; Adjust the return regulating valve (7) to make the water flow reach a set value; Open the main valve (5) and close the return cut-off valve (6) in sequence to switch the water flow from flowing towards the return pipe (4) to flowing towards the branch pipes (8) instantaneously; The water stop step comprises: Open the return cut-off valve (6) and close the main valve (5) in sequence to switch the water flow from flowing towards the branch pipes (8) to flowing towards the return pipe (4) instantaneously; 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 main water pipe (3) and the return pipe (4).

9. The gas generator water supply method according to claim 8, characterized by, The branch pipes (8) are provided with branch regulating valves (25), and in the water supply step, the flow on all branch pipes is adjusted uniformly through the branch regulating valves (25).

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