Propellant temperature control conveying device

Abstract

The utility model relates to a propellant temperature control conveying device, and belongs to the technical field of aerospace propellant tests. The device comprises an interlayer water bath storage tank, a cold and hot machine, a pipeline heat tracing / cold tracing system, a constant-temperature box and a temperature control system. The interlayer water bath storage tank is of a double-layer structure with an inner cavity and an outer interlayer combined, and a water bath coil is arranged at a bottom sealing head to achieve uniform temperature adjustment. The cooling and heating machine is an explosion-proof cooling and heating all-in-one machine and supports bidirectional temperature control from-10 DEG C to 75 DEG C The outer wall of the pipeline is sequentially coated with an electric heating belt, a cold air sleeve and a rubber and plastic thermal insulation material, and is provided with four temperature feedback points and valves; the thermotank adopts a detachable flame-retardant wall and a silicon rock plate heat insulation layer, and an explosion-proof air conditioner is integrated in the thermotank; and the temperature control system is linked with the upper computer through a PLC (Programmable Logic Controller), so that high-precision control of + / -3 DEG C within the range of 0-60 DEG C is realized. The utility model solves the problems of non-uniform temperature, single function and insufficient voltage resistance of the traditional device, and has the advantages of efficient temperature control, safety, reliability and strong environmental adaptability.

Description

Technical Field

[0001] This utility model relates to the field of propellant testing in the aerospace industry, and more specifically, to a propellant temperature control and delivery device. Background Technology

[0002] In the experimental research of aerospace propellants, temperature control of propellants (such as fuels or oxidizers) is a crucial aspect to ensure their performance stability and safety. Currently, conventional temperature-controlled delivery devices mostly employ indirect heating by wrapping heating tape around the outer wall of the storage tank and then encasing it in insulating material. However, this approach has significant drawbacks: First, the heating tape has low heat transfer efficiency and uneven distribution, easily leading to large temperature gradients in the propellant inside the tank, resulting in prominent local overheating or underheating problems; second, existing technology can only achieve unidirectional heating and lacks cooling capabilities, failing to meet the experimental requirements of cryogenic propellants (such as liquid oxygen); third, during delivery, due to the lack of a dynamic temperature control mechanism in the pipeline, fluctuations in ambient temperature can easily cause the propellant temperature to deviate from the set range, affecting the reliability of experimental data. Furthermore, traditional storage tank structures have limited pressure resistance (typically below 10 MPa), making them unsuitable for storing high-pressure propellants, and external heating devices pose safety hazards in flammable and explosive environments.

[0003] The invention disclosed in CN108514904A provides a high-pressure gas heating device and method. This method uses water bath heating to conduct heating tests on high-pressure gas. Water bath heating can not only test the airtightness of the device, but also achieve the purpose of suppressing combustion and explosion. However, this method can only heat in one direction, and its simple structure relies on a single constant temperature water tank and heating element, making it difficult to achieve precise temperature control.

[0004] While some improvements have attempted to enhance temperature control by adding auxiliary heating layers or optimizing insulation materials, these solutions have not resolved systemic defects such as uneven heating / cooling, limited functionality, insufficient pressure resistance, and sensitivity to environmental interference. Therefore, there is an urgent need for a propellant delivery device that integrates efficient temperature control, bidirectional temperature regulation, high-pressure tolerance, and environmental isolation capabilities to improve the safety and data accuracy of aerospace propellant testing. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a propellant temperature control and delivery device that can solve the problems of uneven temperature, single function and insufficient pressure resistance of traditional devices, while having the advantages of high-efficiency temperature control, safety and reliability and strong environmental adaptability.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A propellant temperature-controlled delivery device, comprising:

[0008] A jacketed water bath storage tank has an inner cavity and an outer jacket forming a double-layer structure. The outer jacket is equipped with a water-glycol medium circulation channel.

[0009] The heating and cooling unit is connected to the medium circulation channel of the outer layer of the jacketed water bath storage tank via a pipeline;

[0010] Pipeline heat tracing / cooling tracing system, including valves, thermometers, electric heating tape wrapped around the delivery pipeline, cold air jacket and rubber and plastic insulation material;

[0011] The constant temperature chamber contains the jacketed water bath tank, the chiller, and the pipeline heat tracing / cooling system.

[0012] Temperature control system, including PLC controller and host computer.

[0013] Furthermore, the inner cavity of the jacketed water bath storage tank is designed to a pressure of 15 MPa, and the jacket design pressure is 0.5 MPa. A water bath coil is installed at the bottom end cap. The 15 MPa pressure resistance design of the inner cavity can meet the high-pressure storage requirements of aerospace propellants, while the 0.5 MPa pressure of the outer jacket can effectively reduce the risk of media leakage. The water bath coil can optimize the media flow path and enhance the uniformity of temperature distribution inside the storage tank.

[0014] Furthermore, three thermometers are installed at the top, middle and bottom of the jacketed water bath tank, and the probes of the thermometers extend into the inner cavity. The temperature is monitored at the top, middle and bottom of the tank, and the temperature gradient is fed back in real time, which can effectively avoid local overheating or overcooling problems.

[0015] Furthermore, the jacketed water bath tank is made of 06Cr19Ni10 stainless steel, which combines corrosion resistance and high strength, ensuring the long-term stability of the tank under high pressure and corrosive environments.

[0016] Furthermore, the heating and cooling machine is an air-cooled, explosion-proof integrated heating and cooling machine. The medium is an aqueous solution of ethylene glycol, and the heating temperature range is -10℃ to 75℃. The heating and cooling machine supports bidirectional adjustment from -10℃ to 75℃, and can both heat and cool, meeting the temperature requirements of different aerospace propellant tests.

[0017] Furthermore, the heating and cooling unit includes a compressor, a fan, a pump, a condenser, an evaporator, and a 200L water tank, and is connected to the outer interlayer via an ethylene glycol aqueous solution circulation pipeline.

[0018] Furthermore, the walls of the constant temperature chamber are detachable, with a 50mm thick silica slab filling the middle layer, and are treated with flame retardants and corrosion resistant materials. An explosion-proof air conditioner is installed inside the chamber. The combined effect of the silica slab insulation layer and the explosion-proof air conditioner effectively isolates external temperature fluctuations while maintaining a stable internal environment within the constant temperature chamber.

[0019] Furthermore, the outer wall of the pipeline heat tracing / cooling system is sequentially covered with an electric heating belt, a cold air jacket, and rubber-plastic insulation material, and four thermometers and valves are evenly arranged along the pipeline axis. The valves include valve F1 located at the outlet pipe of the jacketed water bath tank and valve F2 located at the end of the delivery pipeline. The electric heating belt provides heat tracing, the cold air jacket provides cooling, and the rubber-plastic insulation material provides insulation. The three components are combined into a nested structure, which enables dynamic temperature regulation while effectively reducing energy loss.

[0020] Furthermore, the PLC controller of the temperature control system is connected to the host computer via an industrial communication interface, and the PLC controller is also connected to the heating / cooling unit and the electric heating element via electrical wiring. Remote monitoring enabled by communication between the PLC and the host computer allows for automated adjustment of equipment such as the heating / cooling unit and the electric heating element, while reducing errors caused by manual intervention and ensuring the stability of the device.

[0021] Furthermore, the target temperature range of the temperature control system is 0℃ to 60℃, and the control accuracy is ±3℃.

[0022] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0023] 1. By leveraging the synergistic effect of the jacketed water bath storage tank and the pipeline heating / cooling system, precise control of the propellant temperature within the range of 0℃~60℃ ±3℃ can be achieved, significantly improving the reliability of test data.

[0024] 2. The integrated heating and cooling unit supports heating and cooling functions from -10℃ to 75℃, meeting the testing requirements of aerospace propellants in extreme high and low temperature environments.

[0025] 3. The bottom of the storage tank adopts a water bath coil design to optimize the flow of the medium. Combined with the flame-retardant and heat-insulating structure of the constant temperature box, it can effectively eliminate local temperature differences and reduce the risk of flammability and explosion.

[0026] 4. The storage tank is designed with a sandwich structure, which can withstand a high pressure of 15MPa inside, adapting to the storage requirements of high-pressure propellants and ensuring the long-term stability of the device under extreme pressure.

[0027] 5. The application of detachable constant temperature chamber, wireless temperature monitoring and PLC automatic control facilitates equipment maintenance, multi-scenario deployment and remote management, and reduces the cost of manual intervention. Attached Figure Description

[0028] Figure 1 This is an overall structural diagram of the temperature-controlled conveying device;

[0029] Figure 2 This is a structural diagram of a sandwiched water bath storage tank;

[0030] Figure 3 This is a block diagram illustrating the temperature control principle.

[0031] In the diagram: 1. Jacketed water bath tank; 2. Refrigeration unit; 3. Valve; 4. Thermometer; 5. Electric heating belt; 6. Insulation material; 7. Constant temperature chamber. Detailed Implementation

[0032] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0034] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the utility model more thorough and complete.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0036] Example 1

[0037] like Figure 1 As shown, this utility model provides a propellant temperature-controlled delivery device, comprising: a jacketed water bath tank 1, the inner cavity of which and the outer jacket form a double-layer structure, the outer jacket being provided with a water-glycol medium circulation channel; a chiller / heater 2, connected to the medium circulation channel of the outer jacket of the jacketed water bath tank 1 via a pipeline; a pipeline heating / cooling system, including valves 3, thermometers 4, an electric heating belt 5 wound around the delivery pipeline, a cold air sleeve, and rubber and plastic insulation material; a constant temperature chamber 7, in which the jacketed water bath tank 1, the chiller / heater 2, and the pipeline heating / cooling system are all housed; and a temperature control system, including a PLC controller and a host computer.

[0038] Furthermore, the feature is that the inner cavity of the jacketed water bath storage tank 1 is designed to have a pressure of 15 MPa and a volume of 5 cubic meters, while the jacket design pressure is 0.5 MPa. A water bath coil is installed at the bottom end cap. The 15 MPa pressure resistance design of the inner cavity of the storage tank can meet the high-pressure storage requirements of aerospace propellants, the 0.5 MPa pressure of the outer jacket can effectively reduce the risk of media leakage, and the water bath coil can optimize the media flow path and enhance the uniformity of temperature distribution inside the storage tank.

[0039] Furthermore, three thermometers 4 are respectively installed at the top, middle and bottom of the jacketed water bath tank 1, and the probes of the thermometers 4 extend into the inner cavity.

[0040] Furthermore, the jacketed water bath tank 1 is made of 06Cr19Ni10 stainless steel.

[0041] Furthermore, the heating and cooling unit 2 is an air-cooled, explosion-proof integrated heating and cooling unit, with ethylene glycol aqueous solution as the medium. The heating and cooling unit supports bidirectional temperature regulation, and can both heat and cool, meeting the temperature requirements of different aerospace propellant tests.

[0042] Furthermore, the heating and cooling unit 2 includes a compressor, a fan, a pump, a condenser, an evaporator, and a 200L water tank, and is connected to the outer interlayer through a glycol aqueous solution circulation pipeline.

[0043] Furthermore, the walls of the constant temperature chamber 7 are detachable, with a 50mm thick silicon rock board filling the middle layer, and are treated with flame retardant and anti-corrosion properties. An explosion-proof air conditioner is installed inside the chamber.

[0044] Furthermore, the outer wall of the pipeline heating / cooling system is sequentially covered with an electric heating belt 5, a cold air jacket, and rubber-plastic insulation material, and four thermometers 4 and valves 3 are evenly arranged along the pipeline axis; the valves 3 include valve F1 installed on the outlet pipe of the jacketed water bath tank 1, and valve F2 installed at the end of the delivery pipeline. The electric heating belt provides heat tracing, the cold air jacket provides cooling, and the rubber-plastic insulation material provides insulation. The three components are combined into a nested structure, which can achieve dynamic temperature regulation while effectively reducing energy loss.

[0045] Furthermore, the PLC controller of the temperature control system is connected to the host computer through an industrial communication interface, and the PLC controller is connected to the heating / cooling machine 2 and the electric heating belt 5 through electrical circuits.

[0046] Example 2

[0047] This embodiment provides a cryogenic storage and transportation method for cryogenic oxidants. The inner cavity of the jacketed water bath tank is designed to withstand a pressure of 15 MPa and is made of 06Cr19Ni10 stainless steel. The outer jacket circulating medium is a 60% concentration ethylene glycol aqueous solution. The chiller / heater is set to cooling mode, with a minimum temperature of -10℃. A spiral water bath coil is installed at the bottom end of the tank to optimize the uniformity of medium flow. The pipeline cooling system uses a double-layer cold air jacket covered with rubber and plastic insulation material, with four temperature feedback points evenly distributed along the pipeline. The constant temperature chamber has a built-in explosion-proof air conditioner, maintaining the internal temperature at -5℃. The PLC controller dynamically adjusts the chiller / heater power by collecting temperature data from the top, middle, and bottom of the tank to ensure the oxidant temperature remains stable at 0℃±3℃. Valve F1 is a pneumatic shut-off valve with a pressure rating of 15 MPa, linked with the PLC for rapid opening and closing control. This embodiment, through its multi-layer temperature control structure and flame-retardant design, solves the temperature fluctuation problem in flammable and explosive environments of oxidants, improving experimental safety.

[0048] Example 3

[0049] This embodiment provides a fuel delivery method applicable to high-temperature environments ranging from 40℃ to 60℃. The inner cavity of the jacketed water bath storage tank is designed with a pressure increased to 15MPa, and the outer jacket uses a 40% concentration ethylene glycol aqueous solution for circulation. The heating mode is set to a maximum temperature of 75℃. The pipeline heating system uses high-density electric heating belts, with a double-layer stainless steel cooling sleeve on the outside. The explosion-proof air conditioner inside the constant temperature chamber is set to 45℃ to reduce external heat interference. The PLC system adjusts the power of the electric heating belts based on real-time feedback from four thermometers in the pipeline, ensuring that the fuel delivery temperature is controlled within 60℃±2℃. The F2 valve is upgraded to an electric ball valve with a response time of less than 1 second, and works in conjunction with a high-pressure relief valve to ensure system safety. This embodiment significantly improves the stability and efficiency of high-temperature fuel delivery through high-pressure withstand design and a rapid response mechanism.

[0050] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0051] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A propellant temperature-controlled delivery device, characterized in that, include: A double-layer water bath tank (1) has an inner cavity and an outer layer forming a double-layer structure, and the outer layer is provided with a water-glycol medium circulation channel. The heating and cooling unit (2) is connected to the medium circulation channel of the outer layer of the jacketed water bath storage tank (1) through a pipeline; Pipeline heat tracing / cooling tracing system, including valves (3), thermometers (4), electric heating tape (5) wrapped around the conveying pipeline, cold air jacket and rubber and plastic insulation material; The constant temperature box (7) houses the jacketed water bath tank (1), the chiller (2), and the pipeline heat tracing / cooling system. Temperature control system, including PLC controller and host computer.

2. The propellant temperature control and delivery device according to claim 1, characterized in that, The inner cavity of the jacketed water bath tank (1) is designed to have a pressure of 15 MPa, and the jacket design pressure is 0.5 MPa. A water bath coil is installed on its bottom end cap.

3. The propellant temperature control and delivery device according to claim 1, characterized in that, The top, middle and bottom of the jacketed water bath tank (1) are respectively equipped with three thermometers (4), and the probes of the thermometers (4) extend into the inner cavity.

4. The propellant temperature control and delivery device according to claim 1, characterized in that, The material of the jacketed water bath tank (1) is 06Cr19Ni10 stainless steel.

5. The propellant temperature control and delivery device according to claim 1, characterized in that, The heating and cooling machine (2) is an air-cooled explosion-proof integrated heating and cooling machine, the medium is ethylene glycol aqueous solution, and the heating temperature range is -10℃ to 75℃.

6. The propellant temperature control and delivery device according to claim 1, characterized in that, The heating and cooling machine (2) includes a compressor, a fan, a pump, a condenser, an evaporator and a 200L water tank, and is connected to the outer interlayer through a glycol aqueous solution circulation pipeline.

7. The propellant temperature control and delivery device according to claim 1, characterized in that, The walls of the constant temperature box (7) are detachable, with a 50mm silicon rock board filling the middle layer, and are treated with flame retardant and anti-corrosion. An explosion-proof air conditioner is installed inside the box.

8. The propellant temperature control and delivery device according to claim 1, characterized in that, The outer wall of the pipeline heating / cooling system is sequentially covered with an electric heating belt (5), a cold air sleeve and rubber and plastic insulation material, and four thermometers (4) and valves (3) are evenly arranged along the pipeline axis; the valves (3) include F1 valve installed on the outlet pipe of the jacketed water bath tank (1) and F2 valve installed at the end of the conveying pipeline.

9. The propellant temperature control and delivery device according to claim 1, characterized in that, The PLC controller of the temperature control system is connected to the host computer through an industrial communication interface, and the PLC controller is connected to the refrigeration unit (2) and the electric heating belt (5) through electrical circuits.

10. The propellant temperature control and delivery device according to claim 1, characterized in that, The target temperature range of the temperature control system is 0℃ to 60℃, and the control accuracy is ±3℃.

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