Phase change acting system

Abstract

The utility model relates to the technical field of power emission, in particular to a phase change acting system. The phase change acting system comprises a phase change pipe, the phase change pipe is provided with a pressure relief end and a filling end, a piston for controlling a pressure relief opening of the pressure relief end of the phase change pipe to be opened and closed is arranged in the phase change pipe, and the filling end is provided with a liquid carbon dioxide filling valve and a valve closing air cylinder for providing force needed by the piston for closing the pressure relief opening. The piston can open and close the pressure relief opening under the action of the pressure difference between the interior of the phase change pipe and the interior of the valve closing air cylinder, the valve closing air cylinder is connected with an air filling valve, the air filling valve is connected with an air source through an air inflation pipe, and the liquid carbon dioxide filling valve is connected with a liquid carbon dioxide storage tank and a liquid carbon dioxide filling machine through a liquid filling pipe. The liquid carbon dioxide and the compressed air can be filled without assembling and debugging again, so that continuous and rapid filling is realized, the phase change pipe can be ensured to do work outwards rapidly and uninterruptedly, and the overall operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power launch, in particular to a phase change work system. Background Art

[0002] Phase change launch technology is a launch technology that has developed rapidly in recent years. This technology uses liquid carbon dioxide to absorb heat and quickly undergo a phase change to a supercritical state. The internal pressure is greatly increased to a predetermined value and then released. High-pressure jet power is used to perform external work to achieve the function of launching a payload.

[0003] Given the urgent need for efficient and uninterrupted operation in practical operations, continuous work to push a load is the development trend of phase change emission technology. Prior art, such as Chinese invention patent application publication number CN116498755A, discloses a supercritical carbon dioxide pressure differential controlled fast switching valve. The valve comprises a cylindrical phase change chamber, with front and rear ends of the chamber connected to a front sealing cover, respectively. The front sealing cover is provided with a vent, while the rear sealing cover is provided with a carbon dioxide inlet and a heating agent installation port. A cylinder assembly is mounted on the rear sealing cover. The cylinder assembly comprises a cylinder barrel disposed inside the rear sealing cover and an air cylinder disposed outside the rear sealing cover. A movable piston is mounted in the cylinder barrel. The movable piston comprises a piston rod, a piston plug, a front piston, and a rear piston. The piston plug can contact the vent to seal the vent. The front piston remains in the cylinder barrel throughout its travel range. The air cylinder is connected to the rear end of the cylinder barrel and has a gas inlet for filling the cylinder with gas to apply pressure to the rear piston. During launch, 5Mpa gas is filled into the cylinder and 10Mpa carbon dioxide is filled into the phase change chamber. When the carbon dioxide undergoes a supercritical phase change to 150Mpa, a pressure difference is formed between the phase change chamber and the cylinder. The pressure difference is used to move the piston backward, opening the vent of the front sealing cover, and the supercritical carbon dioxide is released to do work on the load.

[0004] The above-mentioned supercritical carbon dioxide pressure differential controlled fast switching valve uses the pressure differential to open the vent, thereby achieving external work. Although there is no need to replace the bursting disc after each work, which saves the preparation time between two adjacent work operations to a certain extent, it is still impossible to achieve continuous work by simply not replacing the bursting disc, and it is difficult to adapt to the current growing development demand for continuous work. Utility Model Content

[0005] The purpose of the utility model is to provide a phase change working system which can realize continuous filling of liquid carbon dioxide and compressed air and meet the needs of continuous launch.

[0006] To achieve the above-mentioned purpose, the technical solution of the phase change working system provided by the present invention is: the phase change working system includes a phase change tube, the phase change tube has a pressure relief end and a filling end, a piston is provided in the phase change tube to control the opening and closing of the pressure relief port of the pressure relief end of the phase change tube, the filling end is provided with a liquid carbon dioxide filling valve and a valve closing cylinder that provides the piston with the force required to close the pressure relief port, the piston can open and close the pressure relief port under the action of the pressure difference between the phase change tube and the valve closing cylinder, the valve closing cylinder is connected to the air filling valve, the air filling valve is connected to the air source through the filling pipe, and the liquid carbon dioxide filling valve is connected to the liquid carbon dioxide storage tank and the liquid carbon dioxide filling machine through the liquid filling pipe.

[0007] As a further improvement, the phase change power system further includes a first monitoring device and a second monitoring device for monitoring the filling amounts of liquid carbon dioxide and compressed air respectively.

[0008] As a further improvement, the first monitoring device is a scale arranged at the bottom of the phase change tube for measuring the weight of the phase change tube.

[0009] As a further improvement, the second monitoring device is a pressure gauge provided on the high-pressure air compressor.

[0010] As a further improvement, the liquid carbon dioxide filling valve includes a connection interface connected to the filling pipe, and a sealing plunger insertion channel for inserting a sealing plunger to seal the liquid carbon dioxide filling inlet.

[0011] As a further improvement, the liquid carbon dioxide filling valve has a Y-shaped structure, which is composed of a sealing plunger inserted into a channel and a connecting interface.

[0012] As a further improvement, the air source is a high-pressure air compressor.

[0013] As a further improvement, the air filling valve is detachably connected to the air filling pipe, and the liquid carbon dioxide filling valve is detachably connected to the liquid filling pipe.

[0014] As a further improvement, the liquid carbon dioxide storage tank and the liquid carbon dioxide filling machine are connected via a liquid filling pipe, and the liquid filling pipe and the liquid carbon dioxide filling valve are connected via a quick connector / thread.

[0015] As a further improvement, the inflation pipe is connected to the air filling valve via a quick connector / thread.

[0016] The beneficial effect is: the utility model provides a new phase change working system, each time filling, it is only necessary to open the gas source to fill the closed valve cylinder with gas to close the pressure relief port. After that, it is also only necessary to open the liquid carbon dioxide storage tank and the liquid carbon dioxide filling machine to fill the phase change tube with liquid carbon dioxide storage, so that after the liquid carbon dioxide undergoes a supercritical phase change, the pressure difference between the phase change tube and the closed valve cylinder causes the relief port to open to allow the high-pressure gas to leak out to perform external work. This phase change working system integrates the filling functions of liquid carbon dioxide and compressed air, and does not require equipment assembly and debugging. Each time filling is performed, it is only necessary to open the corresponding liquid carbon dioxide storage tank, liquid carbon dioxide filling machine or gas source to perform filling, thereby achieving continuous and rapid filling, thereby ensuring that the phase change tube can quickly and uninterruptedly perform external work, ensuring the continuous work of the phase change tube, and improving overall operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of an embodiment of the phase change work system provided by the present invention;

[0018] Figure 2 for Figure 1 Enlarged view of point I in .

[0019] In the figure: 1. Liquid carbon dioxide storage tank; 2. Liquid carbon dioxide filling machine; 3. High-pressure air compressor; 4. Liquid filling pipe; 5. Air filling pipe; 6. Phase change tube; 7. Scale; 8. Liquid carbon dioxide filling valve; 9. Sealing plunger; 10. Air filling valve. DETAILED DESCRIPTION

[0020] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0021] Given the urgent need for efficient and uninterrupted operation in actual operations, continuous work to push the load is the development trend of phase change launch technology. The existing technology cited in the background technology can achieve repeated opening of the vent by the pressure difference, saving the time of replacing the bursting disc after each work, but it still cannot perform continuous work, which obviously cannot meet the actual needs. Based on this, the utility model provides a new phase change work system that can achieve continuous filling of liquid carbon dioxide and compressed air, ensure that the phase change tube can work continuously and stably, improve the overall operation efficiency, and meet the needs of continuous launch.

[0022] The overall design concept of the phase change working system provided by the utility model is:

[0023] The technical concept of this utility model focuses on achieving continuous and efficient filling of phase change tubes. By integrating the phase changer, the liquid carbon dioxide storage tank that supplies liquid carbon dioxide and compressed air to the phase changer, the liquid carbon dioxide filling machine, and the air source into a single system, the next filling can be carried out after one operation is completed without the need for assembly and debugging, quickly meeting the conditions for the next operation and satisfying the needs of phase change tubes in continuous operation scenarios.

[0024] Specifically, as a basic technical solution, Figure 1-2 As shown, a phase change work system includes a phase change tube 6, which has a filling end and a pressure relief end. A piston is provided in the phase change tube to control the opening and closing of the pressure relief port at the pressure relief end of the phase change tube. The filling end is provided with a liquid carbon dioxide filling valve and a valve-closing cylinder that provides the piston with the force required to close the pressure relief port. The piston can open and close the pressure relief port under the action of the pressure difference between the phase change tube and the valve-closing cylinder. The valve-closing cylinder is connected to an air filling valve. After compressed air is filled into the air filling valve, the valve-closing cylinder can be pushed to lock, and the pressure relief port is closed. Then, liquid carbon dioxide is filled through the liquid carbon dioxide filling valve. After filling is completed, the liquid carbon dioxide undergoes a supercritical phase change, which can cause the pressure in the phase change tube to rise sharply. The pressure difference between the pressure in the phase change tube and the valve-closing cylinder is sufficient to open the pressure relief port, and the gas is released to perform work on the load. The filling end is equipped with a liquid CO2 filling valve 8 and an air filling valve 10. The air filling valve 10 is connected to the air source via the air filling pipe 5. The liquid CO2 filling valve 8 is connected to the liquid CO2 storage tank 1 and the liquid CO2 filling machine 2 via the liquid filling pipe 4. Each time the phase change tube 6 is filled, simply turn on the air source to inject a predetermined amount of compressed air into a predetermined position within the phase change tube 6. After the compressed air is filled, the air source is turned off and the liquid CO2 storage tank 1 and the liquid CO2 filling machine 2 are turned on to allow liquid CO2 to be injected into the phase change tube 6. The liquid filling pipe is removed after filling is complete.

[0025] Liquid carbon dioxide undergoes a supercritical phase transition within the phase change tube 6 and is released from the pressure relief end of the phase change tube 6 to perform external work. Before the next work is performed, the corresponding liquid carbon dioxide storage tank 1, liquid carbon dioxide filling machine 2, or air source need only be reopened or closed in sequence to perform the next filling, achieving rapid and continuous filling of liquid carbon dioxide and compressed air. This ability of the phase change power system of the present invention to rapidly fill two different media enables the device to be ready for the next launch in a short period of time, thereby achieving continuous work of the fast phase change tube and being applicable to operations requiring continuous work.

[0026] Based on the above overall introduction to the phase change working system of the present invention, a more specific embodiment is provided below on the basis of the overall introduction:

[0027] This embodiment focuses on the specific structures of the air filling valve and the liquid carbon dioxide filling valve, as well as the connection method between them and the filling pipeline.

[0028] Balls are provided inside the air filling valve. These balls naturally block the inflation channel when no force is applied, preventing gas leakage. When pushed by an external force, the balls will move and expose the inflation channel, allowing compressed air to enter. In this embodiment, the air filling valve is specifically a ball-type compressed air filling valve. When not inflated, the balls fit tightly on the valve seat under the action of a spring or its own gravity, thereby blocking the inflation channel and preventing compressed air leakage. When inflation is required, the operating components such as the operating handle or button on the valve are pushed to make the balls leave the valve seat and move to one side, exposing the inflation channel. At this time, compressed air can smoothly pass through the channel into the target container. After inflation is completed, release the operating component, and the balls automatically reset and re-fit on the valve seat under the action of spring force or gravity, achieving rapid sealing. It has a simple structure, is easy to operate, and has good sealing performance, and can operate stably for a long time.

[0029] like Figure 1-2 As shown, the liquid carbon dioxide filling valve 8 is equipped with a sealing plunger, and the sealing plunger 9 can block the filling inlet of the liquid carbon dioxide into the phase change tube 6. Figure 2 The liquid CO2 filling valve 8 has a connection port for connecting to the filling tube 4 and a sealing plunger insertion channel for inserting a sealing plunger 9. The sealing plunger 9 is inserted and removed from the sealing plunger insertion channel to control the opening and closing of the liquid CO2 filling inlet. During filling, the sealing plunger 9 is removed to allow liquid CO2 to flow into the phase converter 6 through the filling inlet. After filling is complete, the sealing plunger 9 is reinserted into the sealing plunger insertion channel to achieve a quick seal.

[0030] In this embodiment, the liquid carbon dioxide filling valve has a Y-shaped structure, consisting of a sealing plunger inserted into a channel and a connection interface. This Y-shaped liquid carbon dioxide filling valve reduces resistance to the liquid carbon dioxide at the filling inlet, improving filling efficiency and stability. Furthermore, its relatively simple structure makes it easy to manufacture and maintain, reducing failure rates and maintenance costs.

[0031] For ease of maintenance, the air filling valve is detachably connected to the inflation pipe, and the liquid carbon dioxide filling valve is detachably connected to the liquid filling pipe, which allows for quick connection when filling is required and facilitates maintenance and replacement. Specifically, corresponding internal and external threads are machined on the connecting ends of the inflation pipe and the air filling valve, and then the inflation pipe is screwed into the threaded hole of the air filling valve. The connection between the inflation pipe and the air filling valve is achieved by tightly screwing the threads. In another more preferred embodiment, to improve the quick connection between the two, the female connector part of the quick connector is installed on the air filling valve, and then the male connector part of the inflation pipe is inserted into the female connector. The connection is achieved through the internal locking mechanism of the quick connector, and quick assembly and disassembly can be achieved without the use of tools. Correspondingly, the liquid filling pipe 5 and the liquid carbon dioxide filling valve 8 can also be quickly assembled and disassembled by a threaded connection or a quick connector. Of course, in other embodiments, the liquid filling pipe and the liquid carbon dioxide filling valve, as well as the inflation pipe and the air filling valve, can also be non-detachably connected.

[0032] Based on the above overall introduction to the phase change working system of the present invention, a more specific embodiment is provided below on the basis of the overall introduction:

[0033] This embodiment focuses on a detailed description of how to determine if the filling is complete.

[0034] like Figure 1-2 As shown, in this embodiment, the high-pressure air compressor 3 is used as an air source to be connected to the air filling valve 10 through the inflation pipe 5. The high-pressure air compressor is used more frequently during operation and is easy to purchase and maintain. The high-pressure air compressor 3 is equipped with a pressure gauge, and the pressure of the compressed air filled is determined by measuring the displayed reading by the pressure gauge. In other embodiments, a digital pressure gauge can also be provided to intuitively display the pressure value inside the high-pressure air compressor, avoid errors caused by manual readings, and thus allow operators to quickly and accurately obtain the filling data.

[0035] Accordingly, the liquid carbon dioxide storage tank 1 is equipped with a pressure gauge to monitor the pressure and determine the amount of liquid carbon dioxide filled into the phase change tube. Pressure monitoring may be affected by temperature, pressure gauge accuracy, gas compressibility, etc., resulting in inaccurate measurement results. To improve the accuracy of the filling amount, the present invention provides a more preferred embodiment, in which the phase change tube 6 is placed on a scale 7. The scale 7 monitors the filling amount of liquid carbon dioxide by directly measuring the weight change of the phase change tube 6. Compared with pressure detection, the scale 7 can display the weight change in the phase change tube 6 in real time and accurately, thereby ensuring that the filling amount of liquid carbon dioxide meets the predetermined requirements, avoiding the problem of insufficient or excessive filling caused by manual estimation or instrument error in traditional filling methods. In addition, the real-time feedback allows operators to quickly understand the filling progress, thereby reasonably arranging the filling time and improving work efficiency. In addition, because the scale has a certain degree of versatility, it can be applied to phase change tubes of different specifications, which is more economical.

[0036] Based on the above overall introduction to the phase change working system of the present invention, a more specific embodiment is provided below on the basis of the overall introduction:

[0037] This embodiment focuses on a detailed description of the use process of the phase change work system.

[0038] like Figure 1-Figure 2 As shown, before starting to fill, the pressure of the compressed air filled into the phase change tube 6 and the mass of the liquid carbon dioxide filled are determined according to the design performance of the phase change tube 6 and the required working parameters.

[0039] Connect the two ends of the inflation tube 5 to the high-pressure air compressor 3 and the air filling valve 10, respectively. Start the high-pressure air compressor 3 and fill the closed valve cylinder of the phase change tube 6 with compressed air according to a predetermined pressure through the inflation tube 5 and the air filling valve 10. Push the valve core to lock, so that the air vent is closed. Use the pressure gauge on the high-pressure air compressor 3 to measure and determine the pressure of the compressed air. After the compressed air is filled, turn off the high-pressure air compressor 3 and remove the inflation tube 5.

[0040] Connect the two ends of the filling tube 4 to the liquid CO2 filling machine 2 and the liquid CO2 filling valve 8 of the phase change tube 6, respectively. The liquid CO2 filling machine 2 is also connected to the liquid CO2 storage tank 1 via the filling tube 4. Place the connected phase change tube 6 on the scale 7. Open the liquid CO2 storage tank 1 according to the equipment's operating procedures, start the liquid CO2 filling machine 2, open the sealing plunger 9, and add liquid CO2 to the large cylinder of the phase change tube 6 through the filling tube 4 and the liquid CO2 filling valve 8 according to a predetermined mass. The mass of liquid CO2 added is determined by the reading on the scale 7.

[0041] After the liquid carbon dioxide is filled, the sealing plunger 9 is inserted to seal the phase change tube 6. The liquid carbon dioxide filling machine 2 and the liquid carbon dioxide storage tank 1 are turned off, and the filling pipe 4 is removed. After all filling operations are completed, the phase change tube 6 enters a state ready for use.

[0042] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0043] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. A phase change work system, characterized in that: It includes a phase change tube, which has a pressure relief end and a filling end. A piston is provided in the phase change tube to control the opening and closing of the pressure relief port of the pressure relief end of the phase change tube. The filling end is provided with a liquid carbon dioxide filling valve and a valve-closing cylinder that provides the piston with the force required to close the pressure relief port. The piston can open and close the pressure relief port under the action of the pressure difference between the phase change tube and the valve-closing cylinder. The valve-closing cylinder is connected to an air filling valve, which is connected to an air source through an air filling pipe. The liquid carbon dioxide filling valve is connected to a liquid carbon dioxide storage tank and a liquid carbon dioxide filling machine through a liquid filling pipe.

2. The phase change power generation system according to claim 1, characterized in that: The phase change power system further includes a first monitoring device and a second monitoring device for monitoring the filling amounts of liquid carbon dioxide and compressed air respectively.

3. The phase change power generation system according to claim 2, characterized in that: The first monitoring device is a scale arranged at the lower part of the phase change tube, for measuring the weight of the phase change tube.

4. The phase change power generation system according to claim 2, characterized in that: The second monitoring device is a pressure gauge provided on the high-pressure air compressor.

5. The phase change power generation system according to claim 1, characterized in that: The liquid carbon dioxide filling valve comprises a connection interface connected to a liquid filling pipe, and a sealing plunger insertion channel for inserting a sealing plunger to seal a liquid carbon dioxide filling inlet.

6. The phase change power generation system according to claim 5, characterized in that: The liquid carbon dioxide filling valve has a Y-shaped structure, which is composed of a sealing plunger inserted into a channel and a connecting interface.

7. The phase change power generation system according to any one of claims 1 to 6, characterized in that: The air source is a high-pressure air compressor.

8. The phase change power generation system according to any one of claims 1 to 6, characterized in that: The air filling valve is detachably connected to the air filling pipe, and the liquid carbon dioxide filling valve is detachably connected to the liquid filling pipe.

9. The phase change power generation system according to claim 8, characterized in that: The liquid carbon dioxide storage tank and the liquid carbon dioxide filling machine are connected through a filling pipe, and the filling pipe and the liquid carbon dioxide filling valve are connected through a quick connector / thread.

10. The phase change power generation system according to claim 8, characterized in that: The inflation tube is connected to the air filling valve via a quick connector / thread.

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