Gas supply system and method for oxygen-methane igniter

Abstract

The invention relates to a gaseous oxygen and methane igniter, in particular to a gas supply system and method of the gaseous oxygen and methane igniter. In order to overcome the defects that in the prior art, ignition of multiple igniters is difficult to achieve due to the single structure, a gas cylinder set is inconvenient to transport, and a gas conveying pipeline is too long, the gas supply system of the gas oxygen methane igniter comprises a gas oxygen supply module and a gas methane supply module which are the same in structure; the gas oxygen supply module comprises a gas cylinder frame group, a connecting pipeline, a middle gas cylinder group and a supply pipeline, the gas cylinder frame group is used for providing a high-pressure gas source, a gas cylinder outlet of the gas cylinder frame group is communicated with a gas cylinder inlet of the middle gas cylinder group through the connecting pipeline, the connecting pipeline comprises a gas collecting pipeline and a gas supply pipeline which are communicated in sequence, and a gas supply valve is arranged on the gas supply pipeline; a gas cylinder outlet of the middle gas cylinder group is communicated with one end of a supply pipeline, and the other end of the supply pipeline is respectively communicated with a plurality of oxygen-methane igniters through a plurality of branches.

Description

TECHNICAL FIELD

[0001] The present application relates to a gaseous oxygen and gaseous methane igniter, in particular to a gaseous oxygen and gaseous methane igniter gas supply system and method. BACKGROUND

[0002] Igniter is an important part of rocket engine, which is used to provide initial ignition energy of engine to realize stable combustion of engine. For liquid oxygen and methane engine igniter, uneven mixing of gaseous methane and oxygen will cause local methane to be too rich or too lean, which cannot produce a high temperature source with high enough energy and stable existence, resulting in failure to effectively ignite the main flow. In order to ensure that the igniter can reliably and accurately provide ignition energy for the engine, a stable supply system is needed to provide the fuel and oxidizer required for ignition.

[0003] The existing gaseous oxygen and gaseous methane igniter supply system structure is too single, most of which can only meet the ignition demand of a single igniter, and there are problems of inconvenient transportation of gas cylinder group and too long gas delivery pipeline. SUMMARY

[0004] The purpose of the present application is to solve the problems of single structure in the prior art, which is difficult to realize ignition of multiple igniters, and inconvenient transportation of gas cylinder group and too long gas delivery pipeline, and to provide a gaseous oxygen and gaseous methane igniter gas supply system and method.

[0005] To achieve the above purpose, the technical solution provided by the present application is as follows: A gaseous oxygen and gaseous methane igniter gas supply system, characterized in that: it comprises a gaseous oxygen supply module and a gaseous methane supply module; the gaseous oxygen supply module comprises a gas cylinder frame group, a connecting pipeline, an intermediate gas cylinder group and a supply pipeline, the gas cylinder frame group and the intermediate gas cylinder group each comprise at least one gas cylinder; the gas cylinder frame group is used to provide a high-pressure gas source, and the gas cylinder outlet of the gas cylinder frame group is communicated with the gas cylinder inlet of the intermediate gas cylinder group through the connecting pipeline; the connecting pipeline comprises a gas collecting pipeline and a gas delivery pipeline which are communicated in sequence, and a gas delivery valve is arranged on the gas delivery pipeline; the gas cylinder outlet of the intermediate gas cylinder group is communicated with one end of the supply pipeline, and the other end of the supply pipeline is communicated with a plurality of gaseous oxygen and gaseous methane igniters through a plurality of branches; the structure of the gaseous methane supply module is the same as that of the gaseous oxygen supply module.

[0006] Further, the connecting pipeline further comprises an automatic air supplementing pipeline which communicates the outlet of the gas delivery valve with the gas cylinder inlet of the intermediate gas cylinder group, and an automatic air supplementing valve and an orifice plate are arranged on the automatic air supplementing pipeline; A pressure relay is arranged on the gas cylinder of the intermediate gas cylinder group, and the pressure relay is used to control the working state of the automatic air supplementing valve according to the pressure of the intermediate gas cylinder group; A control valve is arranged on the gas delivery pipeline between the gas delivery valve and the gas cylinder inlet of the intermediate gas cylinder group.

[0007] Further, the connecting pipeline further comprises a gas driving pipeline connecting the gas cylinder outlet of the gas cylinder frame group and the gas supply valve. The gas driving pipeline is provided with a gas driving pump.

[0008] Further, the connecting pipeline between the gas cylinder outlet of the gas cylinder frame group and the inlet of the gas collecting pipeline is provided with an air inlet valve, and the gas collecting pipeline is sequentially provided with a process gas inlet and a gas outlet for pipeline blowing and gas releasing. The supply pipeline is connected with a blowing valve, and the supply pipeline is connected with the oxygen and methane igniter through an acoustic nozzle. The gas cylinder outlet of the gas cylinder frame group and the supply pipeline are respectively provided with filters after the blowing valve.

[0009] Meanwhile, the application also provides a gas supply method of the oxygen and methane igniter, which is characterized by comprising the following steps: Step 1, building the gas supply system of the oxygen and methane igniter; Step 2, gas supply, which comprises short-range ignition gas supply and long-range ignition gas supply. The short-range ignition gas supply adopts the intermediate gas cylinder group to supply oxygen and methane. In the long-range ignition gas supply, the intermediate gas cylinder group is used to supply oxygen and methane, and when the pressure of the gas cylinder of the intermediate gas cylinder group is lower than a set value, the gas cylinder frame group is connected with the intermediate gas cylinder group to ensure that the pressure of the intermediate gas cylinder group always meets the inlet pressure requirement of the oxygen and methane igniter.

[0010] Further, in step 2, the connection between the gas cylinder frame group and the intermediate gas cylinder group is as follows: An automatic air supplement pipeline with an automatic air supplement valve and an orifice plate is arranged between the outlet of the gas supply valve and the inlet of the intermediate gas cylinder group; the pressure of the gas cylinder of the intermediate gas cylinder group is detected by a pressure relay, and when the pressure is lower than a set value, the pressure relay controls the automatic air supplement valve to open to supplement the gas source to the intermediate gas cylinder group to maintain the pressure, and the orifice plate is used to control the gas flow; When the pressure of the gas cylinder frame group is lower than a set value, the gas cylinder of the gas cylinder frame group is connected with the gas supply pipeline through the gas driving pump to ensure that the pressure of the intermediate gas cylinder group always meets the inlet pressure requirement of the oxygen and methane igniter.

[0011] Further, in step 2, the gas flow of the supply pipeline meets the following formula during the gas supply: ; Wherein, Q is the gas flow of the supply pipeline, μ is the flow coefficient of the branch corresponding to each gas-oxygen-methane igniter, P is the gas pressure of the supply pipeline, A1 is the throat area of the sonic nozzle corresponding to the first gas-oxygen-methane igniter, A2 is the throat area of the sonic nozzle corresponding to the second gas-oxygen-methane igniter, A N is the throat area of the sonic nozzle corresponding to the Nth gas-oxygen-methane igniter, N is the number of gas-oxygen-methane igniters, R is the gas constant, k is the specific heat ratio of the gas, and T is the gas thermodynamic temperature.

[0012] Further, in step 2, when the gas is supplied, the intermediate gas cylinder group at least satisfies the gas amount V as follows: ; Wherein, P1 is the initial gas pressure of the gas cylinder, P2 is the gas pressure in the gas cylinder after the gas supply time t, Q is the gas flow of the supply pipeline, t is the gas supply time, R is the gas constant, and T is the gas thermodynamic temperature.

[0013] The beneficial effects of the present application are: 1. The gas supply system of the gas-oxygen-methane igniter provided with an intermediate gas cylinder group and a gas cylinder frame group can simultaneously meet the fuel and oxidant supply requirements of the igniter during short-range ignition and long-range ignition, and the intermediate gas cylinder group also functions as a pressure stabilizer, greatly reducing the gas flow shock generated during gas supply. The present application innovatively uses an intermediate gas cylinder group, which is arranged near the product, thereby solving the problems of inconvenient transportation of the gas cylinder frame group and excessively long gas conveying pipeline.

[0014] 2. In the gas supply system of the gas-oxygen-methane igniter, the gas-driven pump is arranged to supply gas, thereby improving the utilization rate of the gas cylinder frame group, reducing gas loss, avoiding frequent replacement of the gas cylinder frame group, prolonging the gas supply time of the igniter, and meeting the multiple ignition requirements of the igniter; when the gas supply valve and the gas-driven pump supply gas simultaneously, the gas supply efficiency can be improved. In addition, the automatic gas supply mode reduces unnecessary manual operation, improves system safety, and the placement positions of the intermediate gas cylinder group and the gas cylinder frame group can be flexibly moved according to the test site conditions, thereby improving the adaptability of the system to the test site.

[0015] 3. In the gas supply system of the gas-oxygen-methane igniter, the same-source multi-path supply mode is adopted, which can simultaneously meet the ignition requirements of multiple igniters, and the sonic nozzle is used for control to ensure the stability of the flow supply and realize constant flow through the guarantee of the common-source inlet pressure of the nozzle.

[0016] 4. In the gas supply method of the gas oxygen gas methane igniter, the intermediate gas cylinder is directly supplied with gas during short-range ignition, and the gas cylinder frame group and the automatic air supply valve are used to supply air to the intermediate gas cylinder during long-range ignition. The pressure of the intermediate gas cylinder is measured by the pressure relay and a certain pressure bandwidth is set. When the pressure is lower than the set value, the automatic air supply valve is opened, and when the pressure is higher than a certain value, the automatic air supply valve is closed, so that the pressure is maintained within a certain range, and the air supply rate is controlled by the orifice plate. At the same time, in order to prevent frequent replacement of the gas cylinder frame group, the air-driven pump air supply mode is added, and when the pressure of the gas cylinder frame group is less than a certain value, the intermediate gas cylinder group can be supplied with air by the air-driven pump. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of an embodiment of the present application.

[0018] BRIEF DESCRIPTION OF DRAWINGS 1-gas oxygen supply module, 2-gas methane supply module, 3-gas cylinder frame group, 4-intermediate gas cylinder group, 5-gas collecting pipeline, 6-gas supply pipeline, 7-gas supply valve, 8-supply pipeline, 9-automatic air supply pipeline, 10-automatic air supply valve, 11-filter, 12-pressure relay, 13-control valve, 14-air drive pipeline, 15-air drive pump, 16-process gas inlet, 17-gas outlet, 18-purge valve, 19-gas inlet valve. DETAILED DESCRIPTION

[0019] The gas supply system of the gas oxygen gas methane igniter is used to supply the propellant and oxidant of the gas oxygen gas methane igniter, and includes the gas oxygen supply module 1 and the gas methane supply module 2 which have the same structure. The gas oxygen supply module 1 includes the gas cylinder frame group 3, the connecting pipeline, the intermediate gas cylinder group 4 and the supply pipeline 8.

[0020] The gas cylinder frame group 3 is used to provide a high-pressure gas source and includes at least one gas cylinder. The gas cylinder outlet of the gas cylinder frame group 3 is connected to the gas cylinder inlet of the intermediate gas cylinder group 4 through the connecting pipeline. The intermediate gas cylinder group 4 includes at least one gas cylinder, and the gas cylinder outlet of the intermediate gas cylinder group 4 is connected to one end of the supply pipeline 8. The other end of the supply pipeline 8 is connected to a plurality of gas oxygen gas methane igniters through a plurality of branches.

[0021] The connecting pipeline comprises a gas collecting pipeline 5 and a gas feeding pipeline 6 which are communicated in sequence, and the gas inlet valve 19 is arranged on the connecting pipeline between the gas cylinder outlet of the gas cylinder frame group 3 and the inlet of the gas collecting pipeline 5, the process gas inlet 16 and the gas outlet 17 are arranged on the gas collecting pipeline 5 in sequence, and the process gas inlet 16 and the gas outlet 17 are respectively used for pipeline blowing and gas releasing. The gas feeding valve 7 and the control valve 13 are arranged on the gas feeding pipeline 6, the automatic gas supplementing pipeline 9 which is communicated between the outlet of the gas feeding valve 7 and the gas cylinder inlet of the intermediate gas cylinder group 4, and the gas driving pipeline 14 which is communicated between the gas cylinder outlet of the gas cylinder frame group 3 and the gas feeding valve 7 are further arranged on the connecting pipeline, the automatic gas supplementing valve 10 is arranged on the automatic gas supplementing pipeline 9, and the orifice plate is arranged behind the gas supplementing valve to control the gas flow. The gas driving pump 15 is arranged on the gas driving pipeline 14.

[0022] The pressure relay 12 is arranged on the gas cylinder of the intermediate gas cylinder group 4, and the pressure relay 12 is used for controlling the working state of the automatic gas supplementing valve 10 according to the pressure of the intermediate gas cylinder group 4.

[0023] The blowing valve 18 is communicated with the supply pipeline 8, the supply pipeline 8 is communicated with the oxygen gas and the methane igniter through the supersonic nozzle, the filter 11 is arranged on the supply pipeline 8 and the gas cylinder outlet of the gas cylinder frame group 3 respectively, and the filter is used for filtering the impurities of the oxygen gas or the methane, and the filter behind the supply pipeline 8 is the oxygen gas and the methane igniter.

[0024] The gas cylinder frame group 3 and the intermediate gas cylinder group 4 of the application are connected by using the small-diameter pipeline, which is used for charging and pressure supplementing of the intermediate gas cylinder group 4, and the applicability of the system to the product position and the building layout is greatly improved, the intermediate gas cylinder group 4 adopts the parallel connection of multiple gas cylinders, the gas volume V used by the igniter can be calculated through the following formula, that is, the gas volume required by the intermediate gas cylinder group 4, and then the actual number of gas cylinders is selected, and the economy is improved.

[0025] ; Wherein, P1 is the initial gas pressure of the gas cylinder, P2 is the gas pressure in the gas cylinder after the gas supply time t, Q is the gas flow of the supply pipeline 8, t is the gas supply time, R is the gas constant, and T is the gas thermodynamic temperature.

[0026] The flow of each oxygen gas and methane igniter in the application is controlled by the throat diameter of each supersonic nozzle to meet the simultaneous ignition requirement of the igniters with different flow rates. The gas flow calculation method of the supply pipeline 8 is as follows: ; Wherein, Q is the gas flow of the supply pipeline 8, μ is the flow coefficient of the branch corresponding to each oxygen gas and methane igniter, in the embodiment, the flow coefficients of the branches are the same, P is the gas pressure of the supply pipeline 8, A1 is the throat area of the supersonic nozzle corresponding to the first oxygen gas and methane igniter, A2 is the throat area of the supersonic nozzle corresponding to the second oxygen gas and methane igniter, and A NThe throat area of the sonic nozzle corresponding to the Nth gas-oxygen gas-methane igniter, N is the number of gas-oxygen gas-methane igniters, R is the gas constant, k is the gas specific heat ratio, and T is the gas thermodynamic temperature.

[0027] The ignition mode of the gas-oxygen gas-methane igniter is divided into short-range ignition and long-range ignition, and the gas supply method of the gas-oxygen gas-methane igniter is divided into short-range ignition gas supply and long-range ignition gas supply according to the ignition mode. Since the short-range ignition time is short, the intermediate cylinder group 4 is used to directly supply gas oxygen or gas methane to the igniter in this ignition mode. When long-range ignition is used, the pressure of the intermediate cylinder group 4 may not be sufficient to meet the inlet pressure requirement of the gas-oxygen gas-methane igniter, so the cylinder frame group 3 is used to supplement the gas of the intermediate cylinder group 4. The intermediate cylinder group 4 is connected with a pressure relay 12 provided with a certain pressure bandwidth. When the pressure of the intermediate cylinder group 4 is lower than the set value, the pressure relay 12 controls the automatic gas supplement valve 10 to open, and the cylinder frame group 3 starts to supplement the gas of the intermediate cylinder group 4. The supplement rate can be adjusted by the orifice plate. When the pressure of the intermediate cylinder group 4 is higher than a certain value, the automatic gas supplement valve 10 is closed, so as to ensure that the pressure of the intermediate cylinder group 4 always remains within the set range and meets the inlet pressure requirement of the gas-oxygen gas-methane igniter.

[0028] In order to prevent frequent replacement of the cylinder frame group 3, a gas-driven pump 15 is added to supplement the gas. When the pressure of the cylinder frame group 3 is less than the set value, the automatic gas supplement valve 10 cannot automatically supplement the gas source to the intermediate cylinder group 4, and the gas-driven pump 15 is started to supplement the gas of the intermediate cylinder group 4. When the pressure of the intermediate cylinder group 4 reaches a certain value, the gas-driven pump 15 is closed.

Claims

1. A gas supply system for an oxygen-methane igniter, characterized in that: It includes an oxygen supply module (1) and a methane supply module (2); The oxygen supply module (1) includes a cylinder frame group (3), a connecting pipeline, an intermediate cylinder group (4), and a supply pipeline (8). The cylinder frame group (3) and the intermediate cylinder group (4) each include at least one cylinder. The gas cylinder frame group (3) is used to provide a high-pressure gas source, and the gas cylinder outlet of the gas cylinder frame group (3) is connected to the gas cylinder inlet of the intermediate gas cylinder group (4) through a connecting pipeline. The connecting pipeline includes a gas collecting pipeline (5) and a gas supply pipeline (6) connected in sequence, and a gas supply valve (7) is provided on the gas supply pipeline (6). The outlet of the intermediate gas cylinder group (4) is connected to one end of the supply pipeline (8), and the other end of the supply pipeline (8) is connected to multiple oxygen-methane igniters through multiple branches. The structure of the gaseous methane supply module (2) is the same as that of the gaseous oxygen supply module (1).

2. The gas supply system for an oxygen-methane igniter according to claim 1, characterized in that: The connecting pipeline also includes an automatic gas replenishment pipeline (9) that connects the outlet of the gas supply valve (7) to the gas cylinder inlet of the intermediate gas cylinder group (4). An automatic gas replenishment valve (10) and an orifice plate are provided on the automatic gas replenishment pipeline (9). Pressure relays (12) are installed on the gas cylinders of the intermediate gas cylinder group (4). The pressure relays (12) are used to control the working state of the automatic gas replenishment valve (10) according to the pressure of the intermediate gas cylinder group (4). A control valve (13) is installed on the gas supply pipeline (6) between the gas supply valve (7) and the gas cylinder inlet of the intermediate gas cylinder group (4).

3. The gas supply system for an oxygen-methane igniter according to claim 2, characterized in that: The connecting pipeline also includes a gas drive pipeline (14) that connects the gas cylinder outlet of the gas cylinder frame group (3) to the gas supply valve (7). An air drive pump (15) is installed on the air drive pipeline (14).

4. The gas supply system for an oxygen-methane igniter according to any one of claims 1-3, characterized in that: An inlet valve (19) is provided on the connecting pipeline between the gas cylinder outlet of the gas cylinder frame group (3) and the inlet of the gas collection pipeline (5). A process gas inlet (16) and a vent (17) are provided on the gas collection pipeline (5) in sequence for purging and venting the pipeline. The supply pipeline (8) is connected to a purge valve (18), and the supply pipeline (8) is connected to an oxygen-methane igniter through a sonic nozzle; The gas cylinder outlet and supply pipeline (8) of the gas cylinder frame group (3) are respectively equipped with filters (11) after the purge valve (18).

5. A gas supply method for an oxygen-methane igniter, characterized in that, Includes the following steps: Step 1: Construct the gas supply system for the oxygen-methane igniter as described in claim 1; Step 2, supply gas, which includes short-range ignition gas supply and long-range ignition gas supply; The short-range ignition gas supply uses an intermediate gas cylinder group (4) to supply gaseous oxygen and gaseous methane. In the long-range ignition gas supply, gaseous oxygen and gaseous methane are supplied through the intermediate gas cylinder group (4). When the gas cylinder pressure of the intermediate gas cylinder group (4) is lower than the set value, the gas cylinder frame group (3) and the intermediate gas cylinder group (4) are connected to ensure that the pressure of the intermediate gas cylinder group (4) always meets the inlet pressure requirements of the gaseous oxygen and methane igniter.

6. The gas supply method for an oxygen-methane igniter according to claim 5, characterized in that, In step 2, the connection between the gas cylinder frame group (3) and the intermediate gas cylinder group (4) is specifically as follows: An automatic gas supply line (9) with an automatic gas supply valve (10) and an orifice plate is installed between the outlet of the gas supply valve (7) and the inlet of the intermediate gas cylinder group (4); the gas cylinder pressure of the intermediate gas cylinder group (4) is detected by the pressure relay (12). When the gas cylinder pressure is lower than the set value, the pressure relay (12) controls the automatic gas supply valve (10) to open and supply gas to the intermediate gas cylinder group (4) to maintain its pressure. The orifice plate is used to control the gas flow rate. When the pressure of the gas cylinder frame group (3) is lower than the set value, the gas cylinder of the control gas cylinder frame group (3) is connected to the gas supply pipeline (6) through the gas drive pump (15) to ensure that the pressure of the intermediate gas cylinder group (4) always meets the inlet pressure requirement of the gas oxygen methane igniter.

7. The gas supply method for an oxygen-methane igniter according to claim 6, characterized in that: In step 2, during gas supply, the gas flow rate of the supply pipeline (8) satisfies the following formula: ； Where Q is the gas flow rate of the supply line (8), μ is the flow coefficient of the branch corresponding to each gas-oxygen-methane igniter, P is the gas pressure of the supply line (8), A1 is the throat area of ​​the sonic nozzle corresponding to the first gas-oxygen-methane igniter, A2 is the throat area of ​​the sonic nozzle corresponding to the second gas-oxygen-methane igniter, and A N Let N be the throat area of ​​the sonic nozzle corresponding to the Nth gas-oxygen-methane igniter, where N is the number of gas-oxygen-methane igniters, R is the gas constant, k is the specific heat ratio of the gas, and T is the thermodynamic temperature of the gas.

8. The gas supply method for an oxygen-methane igniter according to claim 7, characterized in that: In step 2, during gas supply, the intermediate gas cylinder group (4) must at least meet the following gas quantity V: ； Where P1 is the initial gas pressure of the gas cylinder, P2 is the gas pressure inside the gas cylinder after a gas supply time t, Q is the gas flow rate of the supply pipeline (8), t is the gas supply time, R is the gas constant, and T is the gas thermodynamic temperature.

Images