Natural gas hydrogen blending gas supply device

Abstract

The utility model belongs to gas mixing equipment technical field discloses a kind of natural gas hydrogen-doped mixed gas supply device, including installation box, connecting box, natural gas inlet pipe and hydrogen inlet pipe, the setting of multiple first spray head and multiple second spray head can refine the flow of natural gas and hydrogen, so that mixed gas is more uniform and stable, simultaneously using natural gas inlet pipe and hydrogen inlet pipe mutual spiral design, further promote natural gas and hydrogen in pipeline inside more fully mixed, increase the contact area and contact time between natural gas and hydrogen, to improve the mixing efficiency, so that hydrogen-doped natural gas can be more evenly distributed, conducive to subsequent utilization process, can improve the flow characteristics of mixed gas, reduce the turbulence and vortex phenomenon of mixed gas in pipeline inside, help reduce energy loss, to improve the conveying efficiency of mixed gas.

Description

Technical Field

[0001] This utility model relates to the field of gas mixing equipment technology, and in particular to a natural gas hydrogen-blended gas supply device. Background Technology

[0002] Natural gas is a highly efficient and clean energy source, and it has begun to replace coal in power generation and heating. Currently, natural gas is often transported with hydrogen blended in. This deep blending of natural gas and hydrogen improves combustion efficiency, reduces carbon emissions, and promotes deeper decarbonization in industry and construction. Hydrogen blending of natural gas is commonly used in gas engines, gas turbines, and gas boilers. By adjusting the mixing ratio of natural gas with other gases, this mechanism can effectively control the gas mixture supplied to these devices, thereby achieving a more efficient combustion process.

[0003] Existing gas supply systems that reduce carbon emissions by blending natural gas with hydrogen have a small contact area and short contact time between natural gas and hydrogen inside the pipeline, resulting in uneven mixing of the gases and reduced gas delivery efficiency.

[0004] Therefore, there is an urgent need to propose a natural gas-hydrogen blending and gas supply device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a natural gas-hydrogen blending and supply device to solve the problem of uneven mixing of natural gas and hydrogen and improve the transportation efficiency of the mixed gas.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A natural gas blending and hydrogen supply device, comprising:

[0008] The mounting box and the connecting box are located inside the mounting box.

[0009] The natural gas inlet pipe is spiral-shaped. The outer wall of the natural gas inlet pipe is fixedly connected to the inner wall of the connecting box. Multiple first nozzles are provided on the natural gas inlet pipe, and the multiple first nozzles are evenly spaced along the axial direction of the natural gas inlet pipe.

[0010] The hydrogen inlet pipe is spiral-shaped and coils with the natural gas inlet pipe. The outer wall of the hydrogen inlet pipe is fixedly connected to the inner wall of the connecting box. Multiple second nozzles are provided on the hydrogen inlet pipe and are evenly spaced along the axial direction of the hydrogen inlet pipe.

[0011] As a preferred embodiment, the natural gas-hydrogen blending and gas supply device also includes an air inlet pipe and a gas distribution pipe. One end of the air inlet pipe is connected to the gas distribution pipe, the outer wall of the gas distribution pipe is fixedly connected to the inner wall of the connecting box, and multiple third nozzles are provided on the gas distribution pipe. The multiple third nozzles are evenly spaced along the axial direction of the gas distribution pipe.

[0012] Preferably, the installation box has three openings, with one end of the natural gas inlet pipe, one end of the hydrogen inlet pipe, and one end of the air inlet pipe passing through one of the openings and extending into the connection box.

[0013] Preferably, the other end of the natural gas inlet pipe is used to connect to an external natural gas system;

[0014] And / or, the other end of the hydrogen inlet pipe is used to connect to an external hydrogen system;

[0015] And / or, the other end of the air intake pipe is used to connect to an external air system.

[0016] As a preferred embodiment, the natural gas-hydrogen blending and gas supply device also includes a fixed cylinder, a rotating shaft, and a motor. One end of the fixed cylinder is connected to the connecting box, and the other end of the fixed cylinder extends to the outside of the mounting box. An exhaust pipe is provided on the fixed cylinder, and one end of the exhaust pipe is connected to the other end of the fixed cylinder. The rotating shaft is located inside the fixed cylinder, and the output end of the motor rotates through the fixed cylinder and is fixedly connected to the rotating shaft. The rotating shaft is provided with helical blades.

[0017] Preferably, the other end of the exhaust pipe is used to connect to an energy utilization system.

[0018] Preferably, the natural gas-hydrogen blending and gas supply device also includes multiple mounting bases, which are evenly spaced on the inner wall of the connecting box. The outer walls of the natural gas inlet pipe and the hydrogen inlet pipe are fixedly connected to the inner wall of the connecting box through the mounting bases.

[0019] Preferably, the natural gas blending and gas supply device also includes a connection structure, which includes a connecting seat and a damper. There are multiple connecting seats, which are arranged in pairs. In each pair, one connecting seat is fixed to the inner wall of the mounting box, and the other connecting seat is fixed to the outer wall of the mounting box. Each connecting seat is equipped with a universal ball, and two universal balls correspond to one damper. The two ends of the damper are fixedly connected to the universal balls.

[0020] Preferably, the connection structure also includes a connecting plate, one side of which is fixedly connected to the universal ball, and both ends of the damper are fixedly connected to the universal ball through the connecting plate. The number of connecting plates is equal to the number of connecting seats and they correspond one-to-one.

[0021] Preferably, the connecting structure also includes a spring, which is sleeved on the surface of the damper. The two ends of the spring are fixedly connected to the connecting plate. There are multiple springs and dampers, and they correspond one-to-one.

[0022] The beneficial effects of this utility model are:

[0023] This invention provides a natural gas-hydrogen blending and supply device, including an installation box, a connection box, a natural gas inlet pipe, and a hydrogen inlet pipe. The arrangement of multiple first nozzles and multiple second nozzles can refine the flow of natural gas and hydrogen, making the mixed gas more uniform and stable. At the same time, the design of the natural gas inlet pipe and the hydrogen inlet pipe spiraling around each other further promotes more thorough mixing of natural gas and hydrogen inside the pipeline, increases the contact area and contact time between natural gas and hydrogen, thereby improving the mixing efficiency. This allows the hydrogen-blended natural gas to be distributed more evenly, which is beneficial for subsequent utilization. It can improve the flow characteristics of the mixed gas, reduce turbulence and eddies in the mixed gas inside the pipeline, help reduce energy loss, and thus improve the transportation efficiency of the mixed gas. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the natural gas hydrogen blending and gas supply device provided in this embodiment;

[0025] Figure 2 This is a front view schematic diagram of the internal structure of the natural gas hydrogen blending and mixing gas supply device provided in this embodiment;

[0026] Figure 3 This is a schematic diagram of the hydrogen inlet pipe structure provided in this embodiment;

[0027] Figure 4 This is a schematic diagram of the internal side structure of the natural gas hydrogen blending and mixing gas supply device provided in this embodiment;

[0028] Figure 5 yes Figure 2 Enlarged structural diagram at point A in the middle.

[0029] In the picture:

[0030] 11. Mounting box; 111. Opening; 12. Connecting box;

[0031] 21. Natural gas inlet pipe; 211. First nozzle; 22. Hydrogen inlet pipe; 221. Second nozzle; 23. Air inlet pipe; 24. Gas distribution pipe; 241. Third nozzle;

[0032] 31. Fixed cylinder; 311. Exhaust pipe; 32. Rotating shaft; 321. Spiral blade; 33. Motor;

[0033] 40. Mounting bracket;

[0034] 51. Connecting seat; 52. Damper; 53. Universal ball; 54. Connecting plate; 55. Spring. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] This embodiment provides a natural gas-hydrogen blending and supply device to solve the problem of uneven mixing of natural gas and hydrogen, and improve the transportation efficiency of the mixed gas.

[0040] Specifically, such as Figures 1 to 3As shown, a natural gas-hydrogen blending and supply device includes an installation box 11, a connecting box 12, a natural gas inlet pipe 21, and a hydrogen inlet pipe 22. The connecting box 12 is disposed inside the installation box 11. The natural gas inlet pipe 21 is spiral-shaped, and its outer wall is fixedly connected to the inner wall of the connecting box 12. Multiple first nozzles 211 are provided on the natural gas inlet pipe 21, and the multiple first nozzles 211 are evenly spaced along the axial direction of the natural gas inlet pipe 21. The hydrogen inlet pipe 22 is spiral-shaped, and the hydrogen inlet pipe 22 and the natural gas inlet pipe 21 are intertwined. The outer wall of the hydrogen inlet pipe 22 is fixedly connected to the inner wall of the connecting box 12. Multiple second nozzles 221 are provided on the hydrogen inlet pipe 22, and the multiple second nozzles 221 are evenly spaced along the axial direction of the hydrogen inlet pipe 22.

[0041] The arrangement of multiple first nozzles 211 and multiple second nozzles 221 refines the flow of natural gas and hydrogen, resulting in a more uniform and stable gas mixture. Simultaneously, the design of the natural gas inlet pipe 21 and the hydrogen inlet pipe 22 spiraling around each other further promotes more thorough mixing of natural gas and hydrogen within the pipeline, increasing the contact area and contact time between the two gases, thereby improving mixing efficiency. This allows for a more uniform distribution of the hydrogen-blended natural gas, which is beneficial for subsequent utilization. It also improves the flow characteristics of the mixed gas, reduces turbulence and eddies within the pipeline, helps reduce energy loss, and thus improves the transport efficiency of the mixed gas. In this embodiment, the number of first nozzles 211 is 350. In other embodiments, the number of first nozzles 211 can be 3, 100, or 400, etc. Similarly, in this embodiment, the number of second nozzles 221 is 350. In other embodiments, the number of second nozzles 221 can be 3, 100, or 400, etc.

[0042] Furthermore, the natural gas-hydrogen blending and supply device also includes mounting bases 40. Multiple mounting bases 40 are evenly spaced on the inner wall of the connecting box 12. The outer walls of the natural gas inlet pipe 21 and the hydrogen inlet pipe 22 are fixedly connected to the inner wall of the connecting box 12 via mounting bases 40, thus achieving a fixed connection between the natural gas inlet pipe 21 and the hydrogen inlet pipe 22 and the connecting box 12. The mounting bases 40 allow for spaced-out connections between the natural gas inlet pipe 21 and the hydrogen inlet pipe 22 and the inner wall of the connecting box 12, further improving the uniformity of natural gas and hydrogen mixing. Furthermore, the evenly spaced mounting bases 40 enhance the stability of the connection between the natural gas inlet pipe 21 and the hydrogen inlet pipe 22 and the inner wall of the connecting box 12, preventing movement of the natural gas inlet pipe 21 and the hydrogen inlet pipe 22 during device movement, which would affect the mixing efficiency of natural gas and hydrogen. In this embodiment, the number of mounting bases 40 is 16. In other embodiments, the number of mounting bases 40 may be 3, 15, or 20, etc.

[0043] Optionally, natural gas is first mixed with air, and then hydrogen is added. The natural gas-hydrogen blending and supply device also includes an air inlet pipe 23 and a distribution pipe 24. One end of the air inlet pipe 23 is connected to the distribution pipe 24. The outer wall of the distribution pipe 24 is fixedly connected to the inner wall of the connecting box 12. Multiple third nozzles 241 are provided on the distribution pipe 24, and the multiple third nozzles 241 are evenly spaced along the axial direction of the distribution pipe 24. The main purpose of adding air to natural gas is to reduce the calorific value of natural gas, making it suitable for combustion equipment designed to use low-calorific-value gas (such as some industrial stoves and domestic stoves), avoiding incomplete combustion, equipment damage, or energy waste caused by excessively high calorific value of gas, while ensuring the stability and safety of the combustion process. Furthermore, by setting multiple third nozzles 241 on the distribution pipe 24, the air, natural gas, and hydrogen are mixed more evenly. In this embodiment, the number of third nozzles 241 is 8. In other embodiments, the number of third nozzles 241 can also be 3, 7, or 10, etc.

[0044] Furthermore, the installation box 11 has three openings 111, the diameter of which is larger than the diameter of the natural gas inlet pipe 21, the hydrogen inlet pipe 22, and the air inlet pipe 23, respectively. One end of the natural gas inlet pipe 21, one end of the hydrogen inlet pipe 22, and one end of the air inlet pipe 23 are respectively inserted through one of the openings 111 and extend into the connecting box 12, so that the natural gas inlet pipe 21, the hydrogen inlet pipe 22, and the air inlet pipe 23 can extend into the connecting box 12, avoiding collision between the natural gas inlet pipe 21, the hydrogen inlet pipe 22, and the air inlet pipe 23 and the installation box 11, so that the natural gas, hydrogen, and air are released in the connecting box 12, avoiding gas leakage and waste of resources.

[0045] Furthermore, the natural gas provided by the natural gas system is the primary fuel source. The other end of the natural gas inlet pipe 21 is used to connect with an external natural gas system to achieve natural gas supply. The natural gas system typically includes natural gas storage, transportation, and metering components. Hydrogen, as a clean energy source, produces only water as its combustion product. Blending it into natural gas can significantly reduce carbon emissions. The other end of the hydrogen inlet pipe 22 is used to connect with an external hydrogen system, which is responsible for providing the hydrogen needed for blending. The other end of the air inlet pipe 23 is used to connect with an external air system, which is responsible for providing the oxygen needed for combustion. In other embodiments, the other end of the natural gas inlet pipe 21 is used to connect with an external natural gas system, or the other end of the hydrogen inlet pipe 22 is used to connect with an external hydrogen system, or the other end of the air inlet pipe 23 is used to connect with an external air system.

[0046] It should be noted that mixing proportioning valves are installed on the natural gas inlet pipe 21, the air inlet pipe 23, and the hydrogen inlet pipe 22. Figure 1 (Not shown in the text) is used to adjust the mixing ratio of air, natural gas and hydrogen. By precisely controlling the flow rate of each gas, different proportions of hydrogen can be mixed. This is a common method for adjusting the gas ratio, and will not be elaborated here.

[0047] Optionally, the natural gas blending and gas supply device also includes a fixed cylinder 31, a rotating shaft 32, and a motor 33. One end of the fixed cylinder 31 is connected to the connecting box 12, and the other end of the fixed cylinder 31 extends to the outside of the mounting box 11. The fixed cylinder 31 is provided with an exhaust pipe 311, one end of which is connected to the other end of the fixed cylinder 31. The rotating shaft 32 is located inside the fixed cylinder 31. The output end of the motor 33 is rotatably inserted through the fixed cylinder 31 and fixedly connected to the rotating shaft 32. The rotating shaft 32 is provided with a spiral blade 321. When the motor 33 is started, its output shaft drives the rotating shaft 32 to rotate, which in turn drives the spiral blades 321 to rotate. This generates strong shearing force and turbulence, which helps the natural gas and hydrogen to mix thoroughly inside the connecting box 12. This ensures that the two gases reach an ideal mixing ratio before being delivered to the exhaust pipe 311, thereby improving combustion efficiency and reducing carbon emissions. At the same time, the rotation of the spiral blades 321 not only has a mixing effect but also generates a certain pumping effect, delivering the mixed gas to the exhaust pipe 311. It can also reduce eddies and turbulence in the mixed gas inside the connecting box 12, thereby reducing vibration and noise between the connecting box 12 and the mounting box 11.

[0048] Furthermore, the other end of the exhaust pipe 311 is used to connect to the energy utilization system to supply the mixed gas to the energy utilization system. Through the conversion, transmission, distribution and efficient utilization of the mixed gas by the energy utilization system, various energy needs in production and life are met, while reducing the loss of mixed gas and environmental impact, and realizing the rational allocation and sustainable use of energy.

[0049] Optionally, such as Figures 4 to 5As shown, the natural gas blending and gas supply device also includes a connection structure, which includes a connecting seat 51 and a damper 52. There are multiple connecting seats 51, arranged in pairs. In each pair, one connecting seat 51 is fixed to the inner wall of the mounting box 11, and the other connecting seat 51 is fixed to the outer wall of the connecting box 12. Each connecting seat 51 contains a universal ball 53. Two universal balls 53 correspond to one damper 52, and both ends of the damper 52 are fixedly connected to the universal balls 53. The universal balls 53 allow objects to move flexibly in multiple directions on their surface, reducing the risk of damage during transport or operation between the connecting box 12 and the mounting box 11. The frictional resistance facilitates easy adjustment of the position or orientation of the connecting box 12, while the damper 52 dissipates kinetic energy by generating damping force (such as friction, viscosity, etc.), suppressing or slowing down the vibration, impact, or rapid movement of the connecting box 12, thereby stabilizing the state of the entire gas supply device and reducing vibration hazards. The damper 52, in conjunction with the universal ball 53, can adapt to and buffer vibrations from any direction, not only reducing vibration and noise caused by gas flow or the operation of the gas supply device, but also ensuring stable operation of the device, helping to optimize combustion efficiency, ensuring complete combustion of the natural gas and hydrogen mixture, thereby reducing carbon emissions and improving energy utilization efficiency. In this embodiment, the number of connecting seats 51 is 136; in other embodiments, the number of connecting seats 51 can be 4, 90, or 140, etc. It should be noted that the number of dampers 52 is half the number of connecting seats 51, that is, two connecting seats 51 correspond to one damper 52.

[0050] Furthermore, the connection structure also includes a connecting plate 54. One side of the connecting plate 54 is fixedly connected to the universal ball 53. Both ends of the damper 52 are fixedly connected to the universal ball 53 through the connecting plate 54, thereby realizing the connection between the damper 52 and the universal ball 53. The number of connecting plates 54 is equal to the number of connecting seats 51 and they correspond one-to-one. The connecting plate 54 integrates the supporting force of the dispersed universal ball 53 to form a flat and stable bearing surface, which facilitates the placement and movement of the damper 52 and prevents the damper 52 from tilting or getting stuck due to the gap of the universal ball 53 or the instability of a single support, causing the connecting box 12 to shake.

[0051] Furthermore, the connecting structure also includes springs 55, which are sleeved on the surface of dampers 52. Both ends of the springs 55 are fixedly connected to connecting plates 54. The number of springs 55 and dampers 52 is multiple and corresponds one-to-one. The springs 55 buffer the force between the two connecting plates 54, thereby buffering the vibration force between the connecting box 12 and the mounting box 11, further reducing vibration and noise caused by gas flow or equipment operation, and ensuring stable operation of the device. In this embodiment, there are 68 springs 55. In other embodiments, the number of springs 55 can be 3, 55, or 80, etc. It should be noted that the number of springs 55 is half the number of connecting seats 51, that is, two connecting seats 51 correspond to one spring 55.

[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A natural gas blending and hydrogen supply device, characterized in that, include: The mounting box (11) and the connecting box (12) are disposed inside the mounting box (11); Natural gas inlet pipe (21) is spiral in shape. The outer wall of the natural gas inlet pipe (21) is fixedly connected to the inner wall of the connecting box (12). Multiple first nozzles (211) are provided on the natural gas inlet pipe (21). The multiple first nozzles (211) are evenly spaced along the axial direction of the natural gas inlet pipe (21). The hydrogen inlet pipe (22) is spiral-shaped and is coiled with the natural gas inlet pipe (21). The outer wall of the hydrogen inlet pipe (22) is fixedly connected to the inner wall of the connecting box (12). Multiple second nozzles (221) are provided on the hydrogen inlet pipe (22), and the multiple second nozzles (221) are evenly spaced along the axial direction of the hydrogen inlet pipe (22).

2. The natural gas hydrogen blending and mixing gas supply device according to claim 1, characterized in that, The natural gas hydrogen blending and gas supply device also includes an air inlet pipe (23) and a gas distribution pipe (24). One end of the air inlet pipe (23) is connected to the gas distribution pipe (24). The outer wall of the gas distribution pipe (24) is fixedly connected to the inner wall of the connecting box (12). A plurality of third nozzles (241) are provided on the gas distribution pipe (24). The plurality of third nozzles (241) are evenly spaced along the axial direction of the gas distribution pipe (24).

3. The natural gas hydrogen blending and mixing gas supply device according to claim 2, characterized in that, The mounting box (11) has three openings (111). One end of the natural gas inlet pipe (21), one end of the hydrogen inlet pipe (22) and one end of the air inlet pipe (23) are respectively inserted through one of the openings (111) and extend into the connecting box (12).

4. The natural gas hydrogen blending and mixing gas supply device according to claim 3, characterized in that, The other end of the natural gas inlet pipe (21) is used to connect to an external natural gas system; And / or, the other end of the hydrogen inlet pipe (22) is used to communicate with an external hydrogen system; And / or, the other end of the air intake pipe (23) is used to communicate with an external air system.

5. The natural gas hydrogen blending and mixing gas supply device according to claim 1, characterized in that, The natural gas hydrogen blending and gas supply device also includes a fixed cylinder (31), a rotating shaft (32), and a motor (33). One end of the fixed cylinder (31) is connected to the connecting box (12), and the other end of the fixed cylinder (31) extends to the outside of the mounting box (11). An exhaust pipe (311) is provided on the fixed cylinder (31), and one end of the exhaust pipe (311) is connected to the other end of the fixed cylinder (31). The rotating shaft (32) is located inside the fixed cylinder (31). The output end of the motor (33) is rotatably inserted through the fixed cylinder (31) and fixedly connected to the rotating shaft (32). A spiral blade (321) is provided on the rotating shaft (32).

6. The natural gas hydrogen blending and mixing gas supply device according to claim 5, characterized in that, The other end of the exhaust pipe (311) is used to connect to the energy utilization system.

7. The natural gas hydrogen blending and mixing gas supply device according to claim 1, characterized in that, The natural gas hydrogen blending and gas supply device also includes a mounting base (40), and there are multiple mounting bases (40) evenly spaced on the inner wall of the connecting box (12). The outer wall of the natural gas inlet pipe (21) and the outer wall of the hydrogen inlet pipe (22) are respectively fixedly connected to the inner wall of the connecting box (12) through the mounting base (40).

8. The natural gas hydrogen blending and mixing gas supply device according to claim 1, characterized in that, The natural gas hydrogen blending and gas supply device also includes a connection structure, which includes a connecting seat (51) and a damper (52). There are multiple connecting seats (51), which are arranged in pairs. In each pair of connecting seats (51), one connecting seat (51) is fixed to the inner wall of the mounting box (11), and the other connecting seat (51) is fixed to the outer wall of the connecting box (12). Each connecting seat (51) is provided with a universal ball (53). Two universal balls (53) correspond to one damper (52), and the two ends of the damper (52) are fixedly connected to the universal balls (53).

9. The natural gas hydrogen blending and mixing gas supply device according to claim 8, characterized in that, The connection structure also includes a connecting plate (54), one side of which is fixedly connected to the universal ball (53), and both ends of the damper (52) are fixedly connected to the universal ball (53) through the connecting plate (54). The number of connecting plates (54) is equal to the number of connecting seats (51) and they correspond one-to-one.

10. The natural gas hydrogen blending and mixing gas supply device according to claim 9, characterized in that, The connection structure also includes a spring (55), which is sleeved on the surface of the damper (52). The two ends of the spring (55) are fixedly connected to the connecting plate (54) respectively. The number of springs (55) and the number of dampers (52) are both multiple and correspond one-to-one.

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