Extrusion type hydrogen peroxide supply system for long-time test

Abstract

The invention relates to the technical field of hydrogen peroxide supply, in particular to an extrusion type hydrogen peroxide supply system for a long-time test, which comprises a hydrogen peroxide supply unit, an extrusion unit, a pneumatic control unit and a blowdown unit, comprising a hydrogen peroxide storage tank I and a hydrogen peroxide storage tank II, liquid outlet pipelines at the bottoms of the hydrogen peroxide storage tank I and the hydrogen peroxide storage tank II are jointly communicated with a converging pipeline communicated with a hydrogen peroxide outlet, and the extrusion unit is used for providing extrusion gas for the hydrogen peroxide supply unit. The device is formed by connecting a plurality of storage tanks with relatively small volumes in parallel, liquid is supplied in sequence, the long-time test requirement is met, the extrusion type system extrudes dangerous liquid through inert gas, operation is safe, the structure is simple, the situation that test resources are wasted during short-time test is avoided, the hydrogen peroxide supply problem of long-time test is effectively solved, and the test efficiency is improved. And the safety in the liquid supply process is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen peroxide supply, in particular to an extrusion type hydrogen peroxide supply system for long-term testing. Background Art

[0002] High-concentration hydrogen peroxide is a commonly used propellant in the aerospace field, and its decomposition products have the advantage of being green and pollution-free. However, due to its active chemical properties, most metals and organic matter can cause violent decomposition of hydrogen peroxide, which places high demands on the material compatibility of the supply system. The extrusion supply system refers to the method of using inert gas to squeeze out the high-concentration hydrogen peroxide liquid in the tank. The tank volume is often the main factor limiting the long-term operation of the system. Long-term tests cannot be carried out due to the small tank volume, and a single tank volume that is too large will cause a waste of test resources during short-term tests. There are certain limitations. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides an extruded hydrogen peroxide supply system for long-term tests, which solves the problem of supplying hydrogen peroxide in long-term tests by using a plurality of hydrogen peroxide storage tanks in parallel in the prior art. Each storage tank is opened for supply in a predetermined order, thereby solving the problem of supply in long-term tests.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] An extrusion type hydrogen peroxide supply system for long-term testing comprises a hydrogen peroxide supply unit, an extrusion unit, a pneumatic control unit and a blow-off unit, wherein the air inlet end of the hydrogen peroxide supply unit is connected with the air outlet end of the extrusion unit, the system comprises a first hydrogen peroxide storage tank and a second hydrogen peroxide storage tank, the liquid outlet pipes at the bottom of the first hydrogen peroxide storage tank and the second hydrogen peroxide storage tank are commonly connected with a converging pipe connected with a hydrogen peroxide outlet, the extrusion unit is used to provide extrusion gas to the hydrogen peroxide supply unit, and the pneumatic control unit is used to control the switches of gas valves on the hydrogen peroxide supply unit and the extrusion unit.

[0006] As a further optimization scheme of the present invention, a drain valve 1 and a main stop valve 1 are sequentially arranged on the liquid outlet pipeline of the hydrogen peroxide storage tank 1, a drain valve 2 and a main stop valve 2 are sequentially arranged on the liquid outlet pipeline of the hydrogen peroxide storage tank 2, the hydrogen peroxide storage tank 1 and the hydrogen peroxide storage tank 2 are arranged in a water tank 1, and a water tank 2 is arranged at the water outlet ends of the drain valve 1 and the drain valve 2.

[0007] As a further optimization scheme of the present invention, a drain solenoid valve is arranged at the drainage end of the drain valve one and the drain valve two, a buffer chamber, a flow regulating device and a flow meter are arranged in sequence on the confluent pipeline, and a control gas solenoid valve one and a control gas solenoid valve two are arranged on the main stop valve one and the main stop valve two respectively.

[0008] As a further optimization scheme of the present invention, the air inlet ends of the hydrogen peroxide storage tank one and the hydrogen peroxide storage tank two are connected to the air inlet pipe, and the air inlet pipe is provided with a deflation solenoid valve, a safety valve and a pressure sensor. The deflation solenoid valve is used to relieve the pressure of the hydrogen peroxide storage tank one and the hydrogen peroxide storage tank two when the test is suspended or ended.

[0009] As a further optimization scheme of the present invention, the extrusion unit includes an extrusion gas cylinder group, and a pressure reducing valve, a filter, an extrusion gas solenoid valve, an electronic pressure regulating valve and a one-way valve body are sequentially arranged on the outlet pipe of the extrusion gas cylinder group.

[0010] As a further optimization scheme of the present invention, the filter is used to filter impurities in the extrusion gas to prevent the impurities from contaminating the hydrogen peroxide solution, the extrusion gas solenoid valve is used to remotely control the on and off of the extrusion gas, and the electronic pressure regulating valve is used to provide a stable tank extrusion pressure.

[0011] As a further optimization scheme of the present invention, the blowing unit includes a blowing pipe arranged at one of the outlets of the squeezed gas cylinder group, the other end of the blowing pipe is connected to the converging pipe, and a pressure regulating valve body, a shut-off valve body, a blowing valve, a one-way valve 1 and a one-way valve 2 are arranged in sequence on the blowing pipe.

[0012] As a further optimization scheme of the present invention, the pneumatic control unit includes a control gas cylinder group for providing control gas to the pneumatic valve, and a pressure reducing valve 2 is arranged at the gas outlet end of the control gas cylinder group. The pressure reducing valve 2 is divided into two paths and a manual pressure regulating valve 1 and a manual pressure regulating valve 2 are arranged respectively.

[0013] As a further optimization scheme of the present invention, the manual pressure regulating valve 1 is used to drive the main stop valve 1 and the main stop valve 2, and the manual pressure regulating valve 2 is used to drive the electronic pressure regulating valve, the drain valve 1, the drain valve 2 and the blow-off valve.

[0014] By means of the above technical solution, the present invention provides an extruded hydrogen peroxide supply system for long-term testing, which has at least the following beneficial effects compared with the prior art:

[0015] 1. The present invention is composed of a plurality of relatively small-volume storage tanks connected in parallel to supply liquid in sequence to meet the needs of long-term tests. The extrusion system uses inert gas to squeeze dangerous liquids, which is safe to operate and simple in structure. It avoids the waste of test resources in short-term tests and effectively solves the problem of hydrogen peroxide supply in long-term tests.

[0016] 2. The present invention remotely adjusts the extrusion pressure or opens the valve through an electronic pressure regulating valve and a solenoid valve to achieve the safety requirement of human-machine separation, and the buffer chamber has a certain volume to avoid pipeline interruption or flow fluctuation when the storage tank switches the liquid supply. At the same time, the residual liquid in the hydrogen peroxide storage tank one and the hydrogen peroxide storage tank two is discharged into the water tank two through the drain valve one and the drain valve two respectively, and the residual dangerous liquid in the storage tank is discharged and discharged into the water tank to be diluted to a safe concentration, thereby ensuring that the hydrogen peroxide solution is safely handled.

[0017] 3. The present invention can immerse the storage tank in water for water bath cooling by setting a water tank. Ice cubes can be added according to the ambient temperature to maintain a low water bath temperature of the storage tank to avoid high-temperature decomposition of the hydrogen peroxide solution. It can also be used to dilute the hydrogen peroxide solution to a safe concentration when the storage tank leaks. At the same time, the valve on the hydrogen peroxide liquid pipeline adopts a pneumatic control valve to avoid decomposition of the hydrogen peroxide solution caused by electric sparks. The liquid supply process is remotely controlled by a solenoid valve to ensure the safety of the operator.

[0018] 4. The present invention allows the hydrogen peroxide outlet pipeline to be purged after the test by providing a purge valve. The main stop valve 1 and the main stop valve 2 can also be opened to purge the entire system pipeline from the extrusion gas solenoid valve and the electronic pressure regulating valve to prevent residual liquid in the pipeline from causing a safety accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] In the figure: 1. Extrusion gas cylinder group; 2. Pressure reducing valve 1; 3. Filter; 4. Extrusion gas solenoid valve; 5. Electronic pressure regulating valve; 6. Check valve body;

[0022] 71. Hydrogen peroxide storage tank 1; 72. Hydrogen peroxide storage tank 2; 81. Drain valve 1; 82. Drain valve 2; 91. Main stop valve 1; 92. Main stop valve 2;

[0023] 10. Buffer chamber; 11. Flow regulating device; 12. Flow meter;

[0024] 131. Control gas solenoid valve 1; 132. Control gas solenoid valve 2;

[0025] 14. Degassing solenoid valve; 15. Safety valve; 16. Manual pressure regulating valve 1; 17. Manual pressure regulating valve 2; 18. Pressure reducing valve 2; 19. Control gas cylinder group; 20. Drain solenoid valve; 21. Stop valve body; 22. Check valve 2; 23. Check valve 1; 24. Blow-off valve; 25. Water tank 1; 26. Water tank 2;

[0026] 27. Pressure regulating valve body; 28. Pressure sensor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The traditional hydrogen peroxide supply system usually uses inert gas to squeeze out the high-concentration hydrogen peroxide liquid in the storage tank. Due to the small volume of the storage tank, it is impossible to conduct long-term tests. If the volume of a single storage tank is too large, it will cause waste of test resources in short-term tests. This will lead to great limitations in the supply of hydrogen peroxide. In order to meet the needs of long-term tests and avoid waste of test resources in short-term tests, refer to Figure 1 This embodiment provides an extrusion-type hydrogen peroxide supply system for long-term testing, which is composed of a hydrogen peroxide supply unit, an extrusion unit, a pneumatic control unit and a blow-off unit. It adopts a method of connecting multiple storage tanks in parallel to supply liquid in sequence to achieve the purpose of long-term testing.

[0029] The air inlet end of the hydrogen peroxide supply unit is connected to the air outlet end of the extrusion unit, which includes a hydrogen peroxide storage tank 1 71 and a hydrogen peroxide storage tank 2 72. The liquid outlet pipes at the bottom of the hydrogen peroxide storage tank 1 71 and the bottom of the hydrogen peroxide storage tank 2 72 are commonly connected to a converging pipe connected to the hydrogen peroxide outlet. The extrusion unit is used to provide extrusion gas to the hydrogen peroxide supply unit, and the pneumatic control unit is used to control the switch of the gas valves on the hydrogen peroxide supply unit and the extrusion unit.

[0030] Specifically, the outlet pipe of the hydrogen peroxide storage tank 71 is provided with a drain valve 81 and a main stop valve 91 in sequence, and the drain valve 81 and the main stop valve 91 are used for the outlet and safe discharge of the hydrogen peroxide storage tank 71. The outlet pipe of the hydrogen peroxide storage tank 2 72 is provided with a drain valve 82 and a main stop valve 92 in sequence, and the drain valve 82 and the main stop valve 92 are used for the outlet and safe discharge of the hydrogen peroxide storage tank 2 72. The hydrogen peroxide storage tank 71 and the hydrogen peroxide storage tank 2 72 are arranged in the water tank 25. In the process, the hydrogen peroxide storage tank 1 71 and the hydrogen peroxide storage tank 2 72 can be immersed in water for water bath cooling. Ice cubes can be added according to the ambient temperature to maintain a low water bath temperature of the storage tank to avoid high-temperature decomposition of the hydrogen peroxide solution. When the storage tank leaks, it can also be used to dilute the hydrogen peroxide solution to a safe concentration. The water outlet ends of the drain valve 1 81 and the drain valve 2 82 are provided with a water tank 26. The residual liquid in the storage tank can be discharged into the water tank 26 for dilution treatment through the drain valve 1 81 and the drain valve 2 82 to ensure that the hydrogen peroxide solution is safely treated.

[0031] The hydrogen peroxide solution in hydrogen peroxide storage tank 1 71 and hydrogen peroxide storage tank 2 72 flows out through the liquid outlet pipe via main stop valve 1 91 and main stop valve 2 92 under the pressure of extrusion gas; at the end of the test, it is discharged from drain valve 1 81 and drain valve 2 82 into water tank 2 26 for dilution treatment, which can discharge the residual dangerous liquid in the storage tank and discharge it into the water tank to be diluted to a safe concentration, ensuring that the hydrogen peroxide solution is safely treated.

[0032] A buffer chamber 10, a flow regulating device 11 and a flow meter 12 are sequentially arranged on the converging pipeline. The buffer chamber 10 is a relatively thicker pipeline with a certain volume as a buffer when the liquid outlet is switched between storage tanks to avoid flow interruption in the test pipeline. The flow regulating device 11 is a mechanism whose opening area can automatically adapt to adjustment. The larger the pipeline flow, the larger the opening area, and the pressure drop is proportional to the first power of the flow. The flow meter 12 is used to monitor the flow change of the test pipeline.

[0033] Furthermore, a drain solenoid valve 20 is provided at the drain end of the drain valve 1 81 and the drain valve 2 82, and a control gas solenoid valve 131 and a control gas solenoid valve 2 132 are respectively provided on the main stop valve 1 91 and the main stop valve 2 92, and the main stop valve 1 91 and the main stop valve 2 92 can be opened respectively by the control gas solenoid valve 131 and the control gas solenoid valve 2 132.

[0034] The air inlet ends of hydrogen peroxide storage tank 1 71 and hydrogen peroxide storage tank 2 72 are connected to the air inlet pipe, and the air inlet pipe is provided with a venting solenoid valve 14, a safety valve 15 and a pressure sensor 28. The venting solenoid valve 14 is used to relieve the pressure of hydrogen peroxide storage tank 1 71 and hydrogen peroxide storage tank 2 72 when the test is suspended or ended.

[0035] The extrusion unit comprises an extrusion gas cylinder group 1, on the outlet pipe of which a pressure reducing valve 2, a filter 3, an extrusion gas solenoid valve 4, an electronic pressure regulating valve 5 and a one-way valve body 6 are arranged in sequence. The filter 3 is used to filter impurities in the extrusion gas to prevent the impurities from contaminating the hydrogen peroxide solution. The extrusion gas solenoid valve 4 is used to remotely control the on and off of the extrusion gas to achieve the safety operation requirements of human-machine separation. The electronic pressure regulating valve 5 has a remote PID adjustment function and can provide a stable tank extrusion pressure.

[0036] The blowing unit includes a blowing pipe arranged at one of the outlets of the squeezed gas cylinder group 1, the other end of the blowing pipe is connected to the converging pipe, and a pressure regulating valve body 27, a stop valve body 21, a blowing valve 24, a one-way valve 1 23 and a one-way valve 22 are arranged on the blowing pipe in sequence, so that the hydrogen peroxide outlet pipeline can be blown after the test, and the entire system pipeline can also be blown to prevent residual liquid in the pipeline from causing a safety accident.

[0037] The pneumatic control unit includes a control gas cylinder group 19 for providing control gas to the pneumatic valve. A pressure reducing valve 2 18 is arranged at the gas outlet end of the control gas cylinder group 19. The pressure reducing valve 2 18 is divided into two paths and a manual pressure regulating valve 16 and a manual pressure regulating valve 2 17 are arranged respectively. The manual pressure regulating valve 1 16 is adjusted to 5MPa for driving the main stop valve 1 91 and the main stop valve 2 92. The manual pressure regulating valve 2 17 is adjusted to 0.7MPa for driving the electronic pressure regulating valve 5, the drain valve 1 81, the drain valve 2 82 and the blow-off valve 24. The valves on the pipeline adopt pneumatic control valves to avoid decomposition of the hydrogen peroxide solution caused by electric sparks.

[0038] The present invention realizes the need of long-term testing by connecting multiple storage tanks in parallel and supplying liquid in sequence, including but not limited to the parallel connection of more than two storage tanks, which can meet the needs of long-term testing and avoid the waste of test resources in short-time testing.

[0039] Before the test begins, hydrogen peroxide solution is added from the air inlet joints of hydrogen peroxide storage tank 1 71 and hydrogen peroxide storage tank 2 72. The amount of filling should have a certain redundancy according to the test requirements.

[0040] At the beginning of the test, open the pressure reducing valve 1-2 of the bottle mouth of the squeeze gas cylinder group 1 and the pressure reducing valve 2-18 of the bottle mouth of the control gas cylinder group 19, adjust the manual pressure regulating valve 1-16, manual pressure regulating valve 2-17, and pressure regulating valve body 27 to the specified pressure, open the squeeze gas solenoid valve 4, and set the electronic pressure regulating valve 5 to the tank squeeze pressure required for the test; when the tank pressure reaches the set value, the main valve control gas solenoid valve 131 opens, and under the control gas drive, the main stop valve 91 opens, and the hydrogen peroxide storage tank 71 starts to supply liquid. According to the flow estimate When the hydrogen peroxide storage tank 71 is exhausted, switch to the hydrogen peroxide storage tank 72 for liquid supply before it is exhausted; when switching, first open the main valve control gas solenoid valve 132 to drive the main stop valve 92 to open; after a short delay, the main valve control gas solenoid valve 131 is closed, the main stop valve 91 is closed, and the hydrogen peroxide storage tank 72 continues to supply liquid; according to the test requirements, after continuing to supply liquid for a period of time, the main valve control gas solenoid valve 131 is closed, the main stop valve 92 is closed, and the system stops supplying liquid.

[0041] At the end of the test, the electronic pressure regulating valve is set to 5 to 0 MPa, and the extrusion gas solenoid valve 4 is closed; the stop valve body 21 is opened, driving the blow-off valve 24 to open, and the residual hydrogen peroxide solution in the downstream pipeline is blown off; after a period of time, the stop valve body 21 is closed and the blow-off is stopped; the venting solenoid valve 14 is opened to release the pressure in the hydrogen peroxide storage tank 1 71 and the hydrogen peroxide storage tank 2 72. When the pressure in the tank drops to about 0.5-0.7 MPa, the venting solenoid valve 14 is closed, and the drain solenoid valve 20 is opened. Under the action of pressure, the residual liquid in the tank is discharged from the drain valve 1 81 and the drain valve 2 82 to the water tank 2 26 for dilution treatment;

[0042] After the drainage is completed, the drainage solenoid valve 20 is closed, and then the entire supply system pipeline is blown out, the extrusion gas solenoid valve 4 is opened, the electronic pressure regulating valve 5 is set to 0.5-0.7MPa, the main valve control gas solenoid valve 131 and the main valve control gas solenoid valve 2 132 are opened, and the blowing gas is blown out from the main stop valve 1 91 and the main stop valve 2 92 with the residual liquid in the system. After blowing for a period of time, all valves and gas cylinders are closed, and the test is completed.

[0043] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extrusion type hydrogen peroxide supply system for long-term testing, characterized in that: It includes a hydrogen peroxide supply unit, an extrusion unit, a pneumatic control unit and a blow-off unit; The air inlet end of the hydrogen peroxide supply unit is connected to the air outlet end of the extrusion unit, and the hydrogen peroxide storage tank 1 (71) and the hydrogen peroxide storage tank 2 (72) are included, and the liquid outlet pipes at the bottom of the hydrogen peroxide storage tank 1 (71) and the hydrogen peroxide storage tank 2 (72) are connected to a merging pipe connected to the hydrogen peroxide outlet; The extrusion unit is used to provide extrusion gas to the hydrogen peroxide supply unit; The pneumatic control unit is used to control the opening and closing of gas valves on the hydrogen peroxide supply unit and the extrusion unit.

2. An extrusion type hydrogen peroxide supply system for long-term testing according to claim 1, characterized in that: A drain valve 1 (81) and a main stop valve 1 (91) are sequentially arranged on the liquid outlet pipeline of the hydrogen peroxide storage tank 1 (71), and a drain valve 2 (82) and a main stop valve 2 (92) are sequentially arranged on the liquid outlet pipeline of the hydrogen peroxide storage tank 2 (72). The hydrogen peroxide storage tank 1 (71) and the hydrogen peroxide storage tank 2 (72) are arranged in a water tank 1 (25), and the water outlet ends of the drain valve 1 (81) and the drain valve 2 (82) are provided with a water tank 2 (26).

3. An extrusion type hydrogen peroxide supply system for long-term testing according to claim 2, characterized in that: A liquid discharge solenoid valve (20) is arranged at the discharge end of the liquid discharge valve 1 (81) and the liquid discharge valve 2 (82); a buffer chamber (10), a flow regulating device (11) and a flow meter (12) are arranged in sequence on the converging pipeline; and a control gas solenoid valve 1 (131) and a control gas solenoid valve 2 (132) are arranged on the main line stop valve 1 (91) and the main line stop valve 2 (92) respectively.

4. The extrusion type hydrogen peroxide supply system for long-term testing according to claim 1, characterized in that: The air inlet ends of the hydrogen peroxide storage tank 1 (71) and the hydrogen peroxide storage tank 2 (72) are connected to an air inlet pipe, and the air inlet pipe is provided with an air release solenoid valve (14), a safety valve (15) and a pressure sensor (28). The air release solenoid valve (14) is used to release the pressure of the hydrogen peroxide storage tank 1 (71) and the hydrogen peroxide storage tank 2 (72) when the test is suspended or ended.

5. The extrusion type hydrogen peroxide supply system for long-term testing according to claim 3, characterized in that: The extrusion unit comprises an extrusion gas cylinder group (1), and a pressure reducing valve (2), a filter (3), an extrusion gas solenoid valve (4), an electronic pressure regulating valve (5) and a one-way valve body (6) are sequentially arranged on the gas outlet pipe of the extrusion gas cylinder group (1).

6. An extrusion type hydrogen peroxide supply system for long-term testing according to claim 5, characterized in that: The filter (3) is used to filter impurities in the extrusion gas to prevent the impurities from contaminating the hydrogen peroxide solution. The extrusion gas solenoid valve (4) is used to remotely control the on and off of the extrusion gas. The electronic pressure regulating valve (5) is used to provide a stable storage tank extrusion pressure.

7. The extrusion type hydrogen peroxide supply system for long-term testing according to claim 5, characterized in that: The blowing unit comprises a blowing pipe arranged at one of the outlets of the extruded gas cylinder group (1), the other end of the blowing pipe being connected to a merging pipe, and a pressure regulating valve body (27), a stop valve body (21), a blowing valve (24), a one-way valve (23) and a two-way valve (22) being arranged in sequence on the blowing pipe.

8. An extrusion type hydrogen peroxide supply system for long-term testing according to claim 1 or 7, characterized in that: The pneumatic control unit comprises a control gas cylinder group (19) for providing control gas to the pneumatic valve, a pressure reducing valve 2 (18) is arranged at the gas outlet end of the control gas cylinder group (19), and the pressure reducing valve 2 (18) is divided into two paths, and a manual pressure regulating valve 1 (16) and a manual pressure regulating valve 2 (17) are arranged respectively.

9. An extrusion type hydrogen peroxide supply system for long-term testing according to claim 8, characterized in that: The manual pressure regulating valve 1 (16) is used to drive the main line stop valve 1 (91) and the main line stop valve 2 (92), and the manual pressure regulating valve 2 (17) is used to drive the electronic pressure regulating valve (5), the drain valve 1 (81), the drain valve 2 (82) and the blow-off valve (24).

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