Low-loss natural gas cracking hydrogen production segmented filling device

Abstract

The utility model discloses a low-loss natural gas cracking hydrogen production subsection filling device, which relates to the technical field of filling devices and comprises a butt joint pipe, an annular groove is arranged on the outer wall of one end of the butt joint pipe, a threaded sleeve used for being in butt joint with a gas tank is rotatably connected in the annular groove, and a suction pipe is communicated with the butt joint pipe. According to the low-loss natural gas cracking hydrogen production segmented filling device, by arranging a suction pipe, a piston block and other structures, air at the joint of a butt joint pipe and a tank body valve is sucked into the suction pipe to form a vacuum state, so that the air is prevented from being directly filled into the tank body, the purity of hydrogen is ensured, re-purification is avoided, and the loss is reduced; and meanwhile, when the piston block moves in the suction pipe in the direction away from the butt joint pipe, air in the suction pipe can be pressed into the air bag through the air pipe, so that the air bag is expanded and enlarged and adaptively abuts against the outer portion of the threaded sleeve, the threaded sleeve is limited, and the filling stability is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of filling devices, and particularly relates to a segmented filling device for hydrogen production by natural gas cracking with low loss. Background Art

[0002] Hydrogen production by natural gas cracking is a process of decomposing low-carbon alkanes in natural gas into low-carbon unsaturated hydrocarbons and hydrogen at high temperature.

[0003] In the existing filling system for hydrogen production by natural gas cracking, when filling hydrogen into a tank, the filling connector needs to be docked with the tank valve. After docking, air is easily left at the connection, and the remaining air is likely to enter the interior of the tank during the filling process, thereby reducing the purity of hydrogen and affecting subsequent use.

[0004] Therefore, it is necessary to propose a segmented filling device for hydrogen production by natural gas cracking with low loss to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a segmented filling device for hydrogen production by natural gas cracking with low loss, so as to solve the problem that in the existing filling system for hydrogen production by natural gas cracking, when filling hydrogen into a tank, the filling connector needs to be docked with the tank valve. After docking, air is easily left at the connection, and the remaining air is likely to enter the interior of the tank during the filling process, thereby reducing the purity of hydrogen and affecting subsequent use.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A segmented filling device for hydrogen production by natural gas cracking with low loss, including a docking pipe. A ring groove is opened on the outer wall at one end of the docking pipe. A threaded sleeve for docking with a gas tank is rotatably connected inside the ring groove. A suction pipe is communicated with the docking pipe. A piston block is slidably arranged inside the suction pipe. A second electromagnetic valve is fixedly installed at one end of the suction pipe close to the docking pipe. A ring box is fixedly connected to the outside of the docking pipe. The ring box is located at one end of the docking pipe close to the threaded sleeve. One side of the ring box close to the threaded sleeve is an opening. An airbag is fixedly connected inside the ring box. The airbag is communicated and cooperated with the suction pipe. When the airbag expands, it is used to fix the position of the threaded sleeve.

[0007] Preferably, an installation groove is opened at one end of the suction pipe away from the docking pipe. A threaded pipe is fixedly installed inside the installation groove. A threaded rod is threadedly connected inside the threaded pipe. The piston block is rotatably connected to the threaded rod.

[0008] Preferably, one end of the threaded rod away from the piston block is fixedly connected with a grip rod. The grip rod and the threaded rod are distributed in a T shape.

[0009] Preferably, an exhaust hole is formed at one end of the suction pipe away from the docking pipe, and a sealing plug is fitted inside the exhaust hole.

[0010] Preferably, an air duct is connected to one end of the suction pipe away from the docking pipe. The end of the air duct away from the suction pipe passes through the ring box and is connected to the airbag.

[0011] Preferably, a gas transmission pipe is connected to one end of the docking pipe away from the threaded sleeve, and the end of the gas transmission pipe away from the docking pipe is connected to a hydrogen transmission device. A first electromagnetic valve is fixedly installed on the gas transmission pipe.

[0012] The technical effects and advantages of the present utility model:

[0013] By setting structures such as a suction pipe and a piston block, the air at the connection between the docking pipe and the tank valve is sucked into the interior of the suction pipe to form a vacuum state, thereby preventing air from directly filling into the interior of the tank, ensuring the purity of hydrogen, avoiding the need for re-purification, and reducing losses. At the same time, when the piston block moves in the suction pipe in a direction away from the docking pipe, the gas in the suction pipe will be pressed into the interior of the airbag through the air duct, causing the airbag to expand and adaptively abut against the outside of the threaded sleeve to limit the threaded sleeve and ensure the stability of filling.

[0014] The hydrogen filling of the present utility model is segmented to ensure the purity of hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural view of one perspective of the low-loss hydrogen production by natural gas cracking sectional filling device of the present utility model.

[0016] Figure 2 is a schematic structural view of another perspective of the low-loss hydrogen production by natural gas cracking sectional filling device of the present utility model.

[0017] Figure 3 is a schematic sectional view of the low-loss hydrogen production by natural gas cracking sectional filling device of the present utility model.

[0018] Figure 4 is the present utility model Figure 3 Schematic enlarged view of the structure at A in.

[0019] Figure 5 is the present utility model Figure 3 Schematic enlarged view of the structure at B in.

[0020] Figure 6 is the present utility model Figure 3 Schematic enlarged view of the structure at C in.

[0021] In the figure: 1, docking pipe; 2, suction pipe; 3, gas transmission pipe; 4, threaded sleeve; 5, first solenoid valve; 6, threaded pipe; 7, threaded rod; 8, grip rod; 9, installation groove; 10, annular groove; 11, exhaust hole; 12, sealing plug; 13, second solenoid valve; 14, piston block; 15, annular box; 16, airbag; 17, air duct. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present invention.

[0023] The present invention provides a Figures 1 to 6 low-loss natural gas cracking hydrogen production segmented filling device as shown, including a docking pipe 1. An annular groove 10 is formed on the outer wall of one end of the docking pipe 1. A threaded sleeve 4 for docking with a gas tank is rotatably connected inside the annular groove 10. The threaded sleeve 4 is docked with the tank valve to fill hydrogen into the tank. The end of the docking pipe 1 away from the threaded sleeve 4 is communicated with a gas transmission pipe 3, and the end of the gas transmission pipe 3 away from the docking pipe 1 is connected to a hydrogen transmission device. The hydrogen transmission device includes structures such as a delivery pump. Specifically, the crude product hydrogen in the natural gas cracking hydrogen production reaction furnace is transported and filled by the hydrogen transmission device after purification, purification and other measures.

[0024] A first solenoid valve 5 is fixedly installed on the gas transmission pipe 3.

[0025] Considering that when filling hydrogen into the tank, air is likely to remain at the connection between the docking pipe 1 and the tank valve. The remaining air will enter the inside of the tank during the filling process, thereby reducing the purity of hydrogen and affecting subsequent use, resulting in waste. If purified again, energy consumption will increase. A suction pipe 2 is communicated with the docking pipe 1. A piston block 14 is slidably arranged inside the suction pipe 2. A second solenoid valve 13 is fixedly installed at one end of the suction pipe 2 close to the docking pipe 1. When the second solenoid valve 13 is opened and the piston block 14 moves away from the docking pipe 1 inside the suction pipe 2, the air at the connection between the docking pipe 1 and the tank valve will be sucked into the inside of the suction pipe 2, thereby preventing air from directly filling into the inside of the tank, ensuring the purity of hydrogen, avoiding the need for re-purification, and reducing losses.

[0026] In particular, the crude product hydrogen in the natural gas cracking hydrogen production reaction furnace should undergo purification, purification and other measures. If purified again, energy consumption will increase.

[0027] To improve the stability of the docking between the threaded sleeve 4 and the tank valve, a ring box 15 is fixedly connected to the outside of the docking pipe 1. The ring box 15 is located at one end of the docking pipe 1 close to the threaded sleeve 4. One side of the ring box 15 close to the threaded sleeve 4 is provided with an opening. An airbag 16 is fixedly connected inside the ring box 15. The airbag 16 is in communication and cooperation with the suction pipe 2. One end of the suction pipe 2 far from the docking pipe 1 is communicated with an air duct 17. One end of the air duct 17 far from the suction pipe 2 passes through the ring box 15 and is communicated with the airbag 16. When the airbag 16 expands, it is used to fix the position of the threaded sleeve 4.

[0028] Specifically, when the piston block 14 moves in the suction pipe 2 in a direction away from the docking pipe 1, the gas in the suction pipe 2 will be pressed into the inside of the airbag 16 through the air duct 17, causing the airbag 16 to expand and adaptively abut against the outside of the threaded sleeve 4, achieving the effect of limiting the threaded sleeve 4.

[0029] To control the movement of the piston block 14, an installation groove 9 is opened at one end of the suction pipe 2 far from the docking pipe 1. A threaded pipe 6 is fixedly installed inside the installation groove 9. A threaded rod 7 is threadedly connected inside the threaded pipe 6. The piston block 14 is rotatably connected to the threaded rod 7. One end of the threaded rod 7 far from the piston block 14 is fixedly connected to a grip rod 8. The grip rod 8 and the threaded rod 7 are distributed in a T shape.

[0030] Specifically, close the first solenoid valve 5, open the second solenoid valve 13, and rotate the threaded rod 7 through the grip rod 8. Since the threaded rod 7 is in threaded cooperation with the threaded pipe 6, the piston block 14 is driven to move in the suction pipe 2 in a direction away from the docking pipe 1, sucking the air at the connection between the docking pipe 1 and the tank valve into the inside of the suction pipe 2. When the threaded rod 7 can no longer be rotated, close the second solenoid valve 13, and a vacuum state is formed at the connection between the docking pipe 1 and the tank valve.

[0031] At the same time, when the piston block 14 moves in the suction pipe 2 in a direction away from the docking pipe 1, the gas in the suction pipe 2 will be pressed into the inside of the airbag 16 through the air duct 17, causing the airbag 16 to expand and adaptively abut against the outside of the threaded sleeve 4, limiting the threaded sleeve 4 and ensuring the stability of filling.

[0032] Then open the first solenoid valve 5, and hydrogen is transported by the hydrogen transportation equipment for filling.

[0033] By setting up structures such as the suction pipe 2 and the piston block 14, the air at the connection between the docking pipe 1 and the tank valve is sucked into the interior of the suction pipe 2 to form a vacuum state, thus preventing air from directly filling into the interior of the tank, ensuring the purity of hydrogen, avoiding the need for re-purification, and reducing losses. At the same time, when the piston block 14 moves away from the docking pipe 1 inside the suction pipe 2, the gas in the suction pipe 2 is pressed into the interior of the airbag 16 by the air duct 17, causing the airbag 16 to expand and adaptively abut against the outside of the threaded sleeve 4 to limit the threaded sleeve 4 and ensure the stability of filling.

[0034] The filling set by the present utility model includes the first stage: creating a vacuum state at the connection between the docking pipe 1 and the tank valve, and at the same time limiting the threaded sleeve 4; the second stage: opening the first solenoid valve 5 for filling, with segmented setting to ensure the purity of hydrogen.

[0035] An exhaust hole 11 is provided at one end of the suction pipe 2 away from the docking pipe 1, and a sealing plug 12 is fitted inside the exhaust hole 11. In an emergency state, the sealing plug 12 can be pulled out to discharge the gas inside the airbag 16 through the exhaust hole 11.

Claims

1. A segmented filling device for hydrogen production by natural gas cracking with low loss, including a docking pipe (1), characterized in that: One end of the outer wall of the docking pipe (1) is provided with an annular groove (10). A threaded sleeve (4) for docking with a gas tank is rotatably connected inside the annular groove (10). A suction pipe (2) is communicated with the docking pipe (1). A piston block (14) is slidably arranged inside the suction pipe (2). A second solenoid valve (13) is fixedly installed at one end of the suction pipe (2) close to the docking pipe (1). An annular box (15) is fixedly connected to the outside of the docking pipe (1). The annular box (15) is located at one end of the docking pipe (1) close to the threaded sleeve (4). One side of the annular box (15) close to the threaded sleeve (4) is open. An airbag (16) is fixedly connected inside the annular box (15). The airbag (16) is communicated and cooperated with the suction pipe (2). When the airbag (16) expands, it is used to fix the position of the threaded sleeve (4).

2. The low-loss natural gas cracking hydrogen production segmented filling device according to claim 1, characterized in that: An installation groove (9) is opened at one end of the suction pipe (2) far from the docking pipe (1). A threaded pipe (6) is fixedly installed inside the installation groove (9). A threaded rod (7) is threadedly connected inside the threaded pipe (6). The piston block (14) is rotatably connected to the threaded rod (7).

3. A staged charging device for hydrogen production by natural gas cracking with low loss according to claim 2, characterized in that: One end of the threaded rod (7) far from the piston block (14) is fixedly connected with a grip rod (8). The grip rod (8) and the threaded rod (7) are distributed in a T shape.

4. A low-loss natural gas cracking hydrogen production segmented filling device according to claim 1, characterized in that: An exhaust hole (11) is opened at one end of the suction pipe (2) far from the docking pipe (1). A sealing plug (12) is fitted inside the exhaust hole (11).

5. A low-loss hydrogen production device by cracking natural gas with segmented filling according to claim 1, characterized in that: One end of the suction pipe (2) far from the docking pipe (1) is communicated with an air duct (17). One end of the air duct (17) far from the suction pipe (2) passes through the annular box (15) and is communicated with the airbag (16).

6. A low-loss hydrogen production device for natural gas cracking with segmented filling according to claim 1, characterized in that: One end of the docking pipe (1) far from the threaded sleeve (4) is communicated with a gas transmission pipe (3). And one end of the gas transmission pipe (3) far from the docking pipe (1) is connected with a hydrogen transmission device. A first solenoid valve (5) is fixedly installed on the gas transmission pipe (3).

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