Pressurizing system of gas expansion machine

Abstract

The utility model discloses a pressurization system of a gas expansion machine, and relates to the technical field of gas expansion machines, the pressurization system comprises a gas storage device used for storing high-temperature and high-pressure gas, the gas transmission end of the gas storage device is connected with a main pipeline, and a gas expansion structure is arranged below the main pipeline. Through cooperative arrangement of the main pipeline, the communicating pipes, the branch valves, the branch pipelines and other structures, the multiple gas expansion structures are sequentially connected in series through the communicating pipes and connected with the main pipeline through the branch pipelines installed on the communicating pipes, and after the main valve and the branch valves are opened, gas passes through the first gas expansion structure, and then the gas is expanded; the multiple stages of expansion structures are sequentially connected in series for use, the compression ratio of each stage of pressurization is reduced, the purposes of reducing energy consumption and improving system stability are achieved, the situation that an existing gas expansion machine pressurization system adopts a single pressurization mode is avoided as much as possible, and the energy consumption is reduced. The problems of low energy conversion efficiency and poor system stability exist.

Description

Technical Field

[0001] This application relates to the technical field of gas expanders, and particularly to a gas expander pressurization system. Background Art

[0002] A gas expander is a device that converts gas energy into mechanical energy and is widely used in fields such as energy, chemical industry, and refrigeration. Currently, the pressurization system of gas expanders mainly increases the output power by increasing the gas pressure.

[0003] The utility model patent with the publication number CN112324718A proposes a liquid piston type gas expander, which includes a gas source with high-pressure gas, and also includes a liquid storage cavity with a liquid working medium and an energy storage device. The liquid storage cavity includes a ventilation end at the upper part and a liquid passage end at the lower part; the ventilation end is communicated with the gas source, and a valve switch is connected on this communication path; the energy storage device and the liquid passage end are communicated through a connecting pipe with a one-way valve to form an energy storage loop; the energy storage device and the liquid storage end are also communicated through a connecting pipe with the valve switch to form an energy release loop; a drainage passage with the valve switch is also communicated with the ventilation end, and transmission loads are respectively connected to the drainage passage, the energy storage loop, and the energy release loop, where the valve switch is an electric control switch or a pneumatic switch.

[0004] The above gas expander pressurization system adopts a single pressurization method, which has problems of low energy conversion efficiency and poor system stability. Utility Model Content

[0005] The purpose of the present utility model is to solve or at least alleviate the problems that the existing gas expander pressurization system adopts a single pressurization method, resulting in low energy conversion efficiency and poor system stability.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A gas expander pressurization system includes a gas storage device for storing high-temperature and high-pressure gas. A main pipeline is connected to the gas output end of the gas storage device. A gas expansion structure is provided below the main pipeline. The number of gas expansion structures is multiple, and the multiple gas expansion structures are equidistantly distributed along the length direction of the main pipeline, and adjacent two gas expansion structures are arranged in opposite directions. Among them, the gas inlet end of the gas expansion structure close to the gas storage device is communicated with the main pipeline through a pipeline, and the gas inlet ends and exhaust ends of adjacent two gas expansion structures are communicated through a connecting pipe. A branch pipeline is also fixedly connected between each connecting pipe and the main pipeline.

[0008] By adopting the above technical solutions, during use, the user first connects the end of the main pipeline equipped with the main valve to the exhaust end of the gas storage device, and connects the intake end and the exhaust end of the adjacent gas expansion structure through the joints at both ends of the connecting pipe. Finally, multiple connecting pipes are connected to the main pipeline through the branch pipelines. When the main valve is opened, the gas in the gas storage device first enters the adjacent gas expansion structure through the main pipeline. At this time, the user opens the sub-valves installed on the multiple connecting pipes. After the gas passes through the first gas expansion structure, it sequentially enters the subsequent multiple gas expansion structures through the connecting pipes. By using the multi-stage expansion structures in series, the compression ratio of each stage of pressurization is reduced, so as to achieve the purpose of reducing energy consumption and improving the system stability, and avoid as much as possible the problems of low energy conversion efficiency and poor system stability existing in the existing gas expander pressurization system that adopts a single pressurization method.

[0009] Optionally, a main valve is provided at the connection between the main pipeline and the gas storage device, and the main valve is fixedly connected to the main pipeline.

[0010] By adopting the above technical solutions, the main valve is provided to control the connection between the main pipeline and the gas storage device, which is convenient for the user to control the start and stop of the overall gas expander pressurization system.

[0011] Optionally, joints rotatably connected to the connecting pipe are provided at both ends of the connecting pipe, and the intake end and the exhaust end of the gas expansion structure are both connected to the connecting pipe through the joints.

[0012] By adopting the above technical solutions, the joints are threadedly connected to the intake end and the exhaust end of the collective expansion structure. The screwed connection method not only has a stable connection, but also is convenient for the user to install and disassemble the connecting pipe.

[0013] Optionally, the gas expansion structure includes a housing. A first fan is rotatably connected in the inner cavity at one end of the housing, and a second fan is rotatably connected in the inner cavity at the other end of the housing. A transmission shaft with both ends fixedly connected to the centers of the first fan and the second fan respectively is provided between the first fan and the second fan.

[0014] By adopting the above technical solutions, after the high-temperature and high-pressure gas enters the inner cavity of the housing, the high-temperature and high-pressure gas is used to drive the first fan and the second fan installed in the housing to rotate, generating mechanical energy and cooling the gas.

[0015] Optionally, a bearing is sleeved on the end of the second fan away from the first fan. The inner ring of the bearing is fixedly connected to the end of the second fan, and a connecting rod is fixedly connected to the circumferential side of the outer ring of the bearing. The end of the connecting rod away from the outer ring of the bearing is fixedly connected to the inner wall of the housing.

[0016] By adopting the above technical solutions, bearings and connecting rods are provided for installing and connecting the overall structure composed of the first fan, the second fan and the transmission shaft, so that the first fan and the second fan can rotate and do work in the inner cavity of the housing under the action of flowing air, consuming the internal energy of the gas and realizing the cooling work of the gas.

[0017] Optionally, a sub-valve is fixedly connected to the middle section of the connecting pipe.

[0018] By adopting the above technical solutions, the sub-valve is provided to control the number of expansion and pressurization structures connected to the entire gas expander pressurization system, facilitating adjustment by the user according to their own needs.

[0019] Optionally, a branch pipe is provided between the connecting pipe on the left side of the sub-valve and the main pipe. The two ends of the branch pipe are respectively connected to the connecting pipe and the main pipe, and a flow meter is also installed on the branch pipe.

[0020] By adopting the above technical solutions, the branch pipe is provided to convey the gas in the main pipe past the gas expansion structure near the gas storage device side to the subsequent gas expansion structures.

[0021] In summary, the beneficial effects of this application are as follows:

[0022] Through the coordinated setting of structures such as the main pipe, the connecting pipe, the sub-valve and the branch pipe in this application, multiple gas expansion structures are connected in series in sequence through the connecting pipe, and the branch pipe installed on the connecting pipe is connected to the main pipe. When the main valve and the sub-valve are opened, after the gas passes through the first gas expansion structure, it sequentially enters the subsequent multiple gas expansion structures through the connecting pipe. By using multiple-stage expansion structures connected in series, the compression ratio of each stage of pressurization is reduced to achieve the purpose of reducing energy consumption and improving system stability, and it avoids as much as possible the problems of low energy conversion efficiency and poor system stability existing in the existing gas expander pressurization system that adopts a single pressurization method. Description of the Drawings

[0023] Figure 1 is the schematic diagram of the overall connection structure of this application;

[0024] Figure 2 is this application Figure 1 The partial detailed enlarged view at position A in;

[0025] Figure 3 is the schematic sectional structure diagram of the gas expansion structure of this application.

[0026] Description of the reference numerals: 1. Gas storage device; 2. Main pipe; 3. Main valve; 4. Joint; 5. Housing; 6. First fan; 7. Second fan; 8. Transmission shaft; 9. Bearing; 10. Connecting rod; 11. Air nozzle; 12. Connecting pipe; 13. Sub-valve; 14. Branch pipe; 15. Flow meter. DETAILED DESCRIPTION

[0027] The following is combined with Figures 1-3 This application is described in further detail.

[0028] See also Figures 1-3 A gas expander boosting system includes a gas storage device 1 for storing high-temperature and high-pressure gas. A main pipeline 2 is connected to the gas transmission end of the gas storage device 1, and the gas storage device 1 can transport the high-temperature and high-pressure gas to the outside through the main pipeline 2.

[0029] A gas expansion structure is provided below the main pipeline 2. The gas expansion structure utilizes the principle of high-temperature and high-pressure gas expanding and reducing pressure, outputting mechanical work to the outside, and lowering the gas temperature to obtain cooling capacity.

[0030] There are multiple gas expansion structures, and the exhaust ends of the multiple gas expansion structures are all provided with open gas nozzles 11. The multiple gas expansion structures are equidistantly distributed along the length direction of the main pipeline 2, and the gas nozzles 11 of two adjacent gas expansion structures are arranged in opposite directions. The gas nozzles 11 of adjacent gas expansion structures are arranged in opposite directions, which facilitates the subsequent interconnection of the multiple gas expansion structures to form a multi-stage expansion structure, while reducing the compression ratio of each stage of supercharging, so as to achieve the purpose of reducing energy consumption and improving system stability.

[0031] The air inlet end of the gas expansion structure close to the gas storage device 1 is connected to the main pipeline 2 through a pipeline, and the air inlet ends and exhaust ends of two adjacent gas expansion structures are connected through a connecting pipe 12.

[0032] A branch pipe 14 is also fixedly connected between each connecting pipe 12 and the main pipe 2. The user can control the number of gas expansion structures connected to the system through the branch pipe 14, so that the user can select and use according to his own needs.

[0033] Reference Figure 1 A main valve 3 is provided at the connection between the main pipeline 2 and the gas storage device 1, and the main valve 3 is fixedly connected to the main pipeline 2. The main valve 3 is provided to control the connection between the main pipeline 2 and the gas storage device 1, so that the user can control the start and stop of the overall gas expander boosting system.

[0034] Reference Figure 1 Both ends of the connecting pipe 12 are provided with joints 4 rotatably connected to the connecting pipe 12, and the air inlet end and the exhaust end of the gas expansion structure are connected to the connecting pipe 12 through the joints 4. The joints 4 are threadedly connected to the air inlet end and the exhaust end of the collective expansion structure, and the threaded connection method is adopted, which is not only stable, but also convenient for users to install and disassemble the connecting pipe 12.

[0035] Reference Figure 3, the gas expansion structure includes a housing 5. A first fan 6 is rotatably connected to the inner cavity at one end of the housing 5, and a second fan 7 is rotatably connected to the inner cavity at the other end of the housing 5. A transmission shaft 8, whose two ends are fixedly connected to the centers of the first fan 6 and the second fan 7 respectively, is arranged between the first fan 6 and the second fan 7. After the high-temperature and high-pressure gas enters the inner cavity of the housing 5, the first fan 6 and the second fan 7 installed in the housing 5 are driven to rotate by the high-temperature and high-pressure gas, generating mechanical energy to cool the gas.

[0036] Refer to Figure 3 , a bearing 9 is sleeved on the end of the second fan 7 far from the first fan 6. The inner ring of the bearing 9 is fixedly connected to the end of the second fan 7, and a connecting rod 10 is fixedly connected to the circumferential side of the outer ring of the bearing 9. One end of the connecting rod 10 far from the outer ring of the bearing 9 is fixedly connected to the inner wall of the housing 5. The bearing 9 and the connecting rod 10 are provided for installing and connecting the overall structure composed of the first fan 6, the second fan 7 and the transmission shaft 8, so that the first fan 6 and the second fan 7 can rotate and do work in the inner cavity of the housing 5 under the action of the flowing air. The internal energy of the gas is consumed to realize the cooling work of the gas.

[0037] Refer to Figure 2 , a sub-valve 13 is fixedly connected to the middle section of the connecting pipe 12. The sub-valve 13 is provided for controlling the number of expansion and pressurization structures connected to the entire gas expander pressurization system, facilitating adjustment by users according to their own needs.

[0038] Refer to Figure 1 , a branch pipe 14 is arranged between the connecting pipe 12 on the left side of the sub-valve 13 and the main pipe 2. The two ends of the branch pipe 14 are respectively connected and communicated with the connecting pipe 12 and the main pipe 2, and a flow meter 15 is also installed on the branch pipe 14. The branch pipe 14 is provided for transporting the gas in the main pipe 2 past the gas expansion structure near the gas storage device 1 to the subsequent gas expansion structure.

[0039] A control method for a gas expander pressurization system includes the following steps:

[0040] Step 1, connect the end of the main pipe 2 with the main valve 3 to the exhaust end of the gas storage device 1;

[0041] Step 2, fixedly connect one of the gas expansion structures to the main pipe 2 through a pipe;

[0042] Step 3, connect the intake end and the exhaust end of other adjacent gas expansion structures through the connectors 4 at both ends of the connecting pipe 12;

[0043] Step 4, install a branch pipe 14 communicating with the main pipe 2 on a section of the connecting pipe 12 far from the sub-valve 13;

[0044] Step 5: Open the main valve 3 and the branch valves 13 at appropriate positions, and use an appropriate number of gas expansion structures to increase the gas pressure to achieve an increase in output power.

[0045] The implementation principle of this application is as follows: When in use, the user first connects the end of the main pipeline 2 equipped with the main valve 3 to the exhaust end of the gas storage device 1, and connects the intake end and the exhaust end of the adjacent gas expansion structure through the connectors 4 at both ends of the connecting pipe 12. Finally, multiple connecting pipes 12 are connected to the main pipeline 2 through the branch pipelines 14. When the main valve 3 is opened, the gas in the gas storage device 1 first enters the adjacent gas expansion structure through the main pipeline 2. At this time, the user opens the branch valves 13 installed on the multiple connecting pipes 12. After passing through the first gas expansion structure, the gas sequentially enters the subsequent multiple gas expansion structures through the connecting pipes 12. By using the multi-stage expansion structures in series, the compression ratio of each stage of pressurization is reduced, so as to achieve the purpose of reducing energy consumption and improving the system stability, and avoid the problems of low energy conversion efficiency and poor system stability existing in the existing gas expander pressurization system that adopts a single pressurization method.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A gas expander pressurizing system, comprising a gas storage device (1) for storing high-temperature and high-pressure gas, wherein a main pipeline (2) is connected to a gas transmission end of the gas storage device (1), and a gas expansion structure is provided below the main pipeline (2), characterized in that: There are a plurality of gas expansion structures, which are equidistantly distributed along the length direction of the main pipeline (2), and are arranged in opposite directions between two adjacent gas expansion structures, wherein the gas inlet end of the gas expansion structure close to the gas storage device (1) is connected to the main pipeline (2) through a pipeline, and the gas inlet end and the gas outlet end of the two adjacent gas expansion structures are connected through a connecting pipe (12), and a branch pipe (14) is fixedly connected between each connecting pipe (12) and the main pipeline (2).

2. A gas expander pressurizing system according to claim 1, characterized in that: A main valve (3) is provided at the connection between the main pipeline (2) and the gas storage device (1), and the main valve (3) is fixedly connected to the main pipeline (2).

3. A gas expander pressurizing system according to claim 1, characterized in that: Both ends of the connecting pipe (12) are provided with joints (4) rotatably connected to the connecting pipe (12), and both the air inlet end and the air outlet end of the gas expansion structure are connected to the connecting pipe (12) via the joints (4).

4. A gas expander pressurizing system according to claim 1, characterized in that: The gas expansion structure comprises a shell (5), wherein a first fan (6) is rotatably connected in an inner cavity at one end of the shell (5), and a second fan (7) is rotatably connected in an inner cavity at the other end of the shell (5), and a transmission shaft (8) is provided between the first fan (6) and the second fan (7), with two ends of the transmission shaft being fixedly connected to the center of the first fan (6) and the center of the second fan (7), respectively.

5. A gas expander pressurizing system according to claim 4, characterized in that: The end of the second fan (7) away from the first fan (6) is sleeved by a bearing (9); the inner ring of the bearing (9) is fixedly connected to the end of the second fan (7); the outer ring of the bearing (9) is fixedly connected to the circumference of the connecting rod (10); the end of the connecting rod (10) away from the outer ring of the bearing (9) is fixedly connected to the inner wall of the housing (5).

6. A gas expander pressurizing system according to claim 1, characterized in that: A sub-valve (13) is fixedly connected to the middle section of the connecting pipe (12).

7. A gas expander pressurizing system according to claim 6, characterized in that: A branch pipe (14) is provided between the connecting pipe (12) on the left side of the sub-valve (13) and the main pipe (2), and both ends of the branch pipe (14) are respectively connected to the connecting pipe (12) and the main pipe (2), and a flow meter (15) is also installed on the branch pipe (14).

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