Natural gas hydrogen doping device

Abstract

The utility model provides a natural gas hydrogen doping device which comprises a main pipe body, the middle of the main pipe body expands outwards to form a drum cavity and a connecting pipe, the connecting pipe is vertically and fixedly connected to the outer surface of the drum cavity of the main pipe body, and the top end of the connecting pipe is transversely and fixedly connected with a sealing cover. According to the natural gas hydrogen doping device provided by the utility model, by arranging the connecting pipe, when the device is used and hydrogen doping operation is carried out, the hydrogen storage tank is communicated with the front end of the main pipe body of the device, then a worker rotates the threaded rod to control the lifting of the piston block, and in the lifting process of the piston block, the piston block is prevented from falling off. Hydrogen in the hydrogen storage tank can enter the drum cavity and the connecting pipe, after a proper amount of hydrogen is obtained, the hydrogen storage tank is moved away, and then the hydrogen in the connecting pipe can be fed into the natural gas pipeline or the storage tank by reversely rotating the threaded rod, so that direct contact between natural gas and the hydrogen storage tank is avoided; and the hydrogen is prevented from being polluted.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas, in particular to a natural gas hydrogen blending device. Background Art

[0002] Natural gas refers to all gases that exist naturally in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere (including oilfield gas, gasfield gas, mud volcano gas, coalbed methane and biogenic gas, etc.); the definition of "natural gas" that people have long used is a narrow definition based on energy, which refers to a mixture of hydrocarbons and non-hydrocarbon gases naturally stored in strata; in petroleum geology, it usually refers to oilfield gas and gasfield gas; its composition is mainly hydrocarbons and contains non-hydrocarbon gases; natural gas is stored in underground porous rock formations, including oilfield gas, gasfield gas, coalbed methane, mud volcano gas and biogenic gas, etc., and a small amount comes from coal seams; it is a high-quality fuel and chemical raw material.

[0003] When natural gas is used, carbon monoxide emissions can be reduced by adding hydrogen. However, in the prior art, the natural gas pipeline or storage tank itself has a certain pressure. When the hydrogen blending operation is performed, the natural gas in the natural gas pipeline or storage tank may also flow into the hydrogen storage tank, affecting the purity of the hydrogen inside the hydrogen storage tank.

[0004] Therefore, it is necessary to provide a new natural gas hydrogen blending device to solve the above technical problems. Summary of the invention

[0005] The utility model provides a natural gas hydrogen blending device, which solves the technical problem that the natural gas pipeline or storage tank itself has a certain pressure. During the hydrogen blending operation, the natural gas in the natural gas pipeline or storage tank may also flow into the hydrogen storage tank, affecting the purity of the hydrogen inside the hydrogen storage tank.

[0006] In order to solve the above technical problems, the utility model provides a natural gas hydrogen blending device, comprising a main pipe, the middle part of which expands outward to form a drum cavity;

[0007] A connecting tube, the connecting tube is vertically fixedly connected to the outer surface of the drum cavity part of the main pipe body, the top of the connecting tube is laterally fixedly connected with a closing cover, the top of the closing cover is vertically penetrated with a mounting opening, the inside of the mounting opening is fixedly connected with a threaded sleeve, the inside of the threaded sleeve is vertically threaded with a threaded rod, the bottom end of the threaded rod extends to the bottom end of the inside of the connecting tube and is rotatably connected with a piston block, the outer surface of the piston block is interference fit with the inner surface of the connecting tube.

[0008] Preferably, a plurality of guide rods are vertically fixedly connected to the top end of the piston block, and the top ends of the plurality of guide rods can slidably penetrate the closing cover and extend upward.

[0009] Preferably, a connecting block is fixedly connected to the top end of the threaded rod, a rotating handle is laterally fixedly connected to the outer surface of the connecting block, and a non-slip cover is provided on the handle surface of the rotating handle.

[0010] Preferably, a mounting ring is fixedly connected to the front end of the main body, a lap ring is fixedly connected to the rear surface of the mounting ring, a plurality of support rods are fixedly connected to the inside of the main body and at the rear of the mounting ring, a fixing ring is fixedly connected to the inner ends of the plurality of support rods, a sliding rod is laterally slidably connected to the inside of the fixing ring, a lap plate is fixedly connected to the front end of the sliding rod, and a spring is laterally fixedly connected between the lap plate and the fixing ring.

[0011] Preferably, the lap ring and the lap sheet are both made of rubber material, and the outer diameter of the lap sheet is larger than the inner diameter of the lap ring and smaller than the outer diameter of the lap ring.

[0012] Preferably, a connecting flange is fixedly connected to the rear end of the main pipe body, and a valve is provided on the main pipe body and at the rear of the drum cavity.

[0013] Compared with the related art, the natural gas hydrogen blending device provided by the utility model has the following beneficial effects: the utility model provides a natural gas hydrogen blending device, by setting a connecting pipe, when the device is in use, when performing the hydrogen blending operation, the hydrogen storage tank is connected to the front end of the main pipe body of the device, and then the staff rotates the threaded rod to control the lifting of the piston block. During the lifting of the piston block, the hydrogen inside the hydrogen storage tank will enter the drum cavity and the inside of the connecting pipe. After obtaining a suitable amount of hydrogen, the hydrogen storage tank is removed, and then the threaded rod is rotated in the opposite direction to send the hydrogen inside the connecting pipe into the natural gas pipeline or the inside of the storage tank, so as to avoid direct contact between the natural gas and the hydrogen storage tank, and also avoid the occurrence of hydrogen contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a preferred embodiment of a natural gas hydrogen blending device provided by the utility model;

[0015] Figure 2 for Figure 1 The overall external structural schematic diagram of the natural gas hydrogen blending device shown;

[0016] Figure 3 for Figure 1 A partial enlarged view of the area at point A.

[0017] Numbers in the figure: 1. main body, 2. drum cavity, 3. connecting flange, 4. connecting pipe, 5. threaded sleeve, 6. piston block, 7. connecting block, 8. rotating handle, 9. anti-slip sleeve, 10. piston block, 11. guide rod, 12. mounting ring, 13. lap ring, 14. support rod, 15. fixing ring, 16. sliding rod, 17. lap plate, 18. spring, 19. valve. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0019] Please refer to Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of a natural gas hydrogen blending device provided by the utility model; Figure 2 for Figure 1 The overall external structural schematic diagram of the natural gas hydrogen blending device shown; Figure 3 for Figure 1 A partial enlarged view of the area at point A in the middle. The natural gas hydrogen blending device comprises: a main pipe body 1, the middle part of the main pipe body 1 is expanded outward to form a drum cavity 2;

[0020] A connecting tube 4 is vertically fixedly connected to the outer surface of the drum cavity 2 of the main body 1. The top of the connecting tube 4 is laterally fixedly connected with a closing cover. The top of the closing cover is vertically penetrated with a mounting opening. The inside of the mounting opening is fixedly connected with a threaded sleeve 5. The inside of the threaded sleeve 5 is vertically threadedly connected with a threaded rod 6. The bottom end of the threaded rod 6 extends to the bottom end of the inside of the connecting tube 4 and is rotatably connected with a piston block 10. The outer surface of the piston block 10 is interference fit with the inner surface of the connecting tube 4.

[0021] When the device is in use and performing hydrogen blending operations, the hydrogen storage tank is connected to the front end of the main body 1 of the device, and then the staff rotates the threaded rod 6 to control the lifting of the piston block 10. During the lifting of the piston block 10, the hydrogen inside the hydrogen storage tank will enter the drum cavity 2 and the inside of the connecting pipe 4. When the appropriate amount of hydrogen is obtained, the hydrogen storage tank is removed, and then the threaded rod 6 is rotated in the opposite direction to send the hydrogen inside the connecting pipe 4 into the natural gas pipeline or the inside of the storage tank, so as to avoid direct contact between the natural gas and the hydrogen storage tank, thereby avoiding the occurrence of hydrogen contamination.

[0022] During the rotation of the threaded rod 6, it will move in the vertical direction due to the influence of the threaded sleeve 5, thereby driving the piston block 10 connected to it to move synchronously. The drum cavity 2 can increase the cross-sectional area of ​​this part of the main pipe body 1, thereby increasing the cross-sectional area of ​​the connecting pipe 4, thereby increasing the capacity of the connecting pipe 4, thereby ensuring that a sufficient amount of hydrogen can be obtained in one extraction.

[0023] A plurality of guide rods 11 are vertically fixedly connected to the top end of the piston block 10 , and the top ends of the plurality of guide rods 11 slidably penetrate the closing cover and extend upward.

[0024] The guide rod 11 plays a guiding role, ensuring that the piston block 10 can always maintain a horizontal state and will not be skewed to cause leakage.

[0025] The top end of the threaded rod 6 is fixedly connected with a connecting block 7 , and the outer surface of the connecting block 7 is laterally fixedly connected with a rotating handle 8 , and the handle surface of the rotating handle 8 is covered with an anti-slip cover 9 .

[0026] When rotating the threaded rod 6, the rotating handle 8 can be held and rotated, which is a labor-saving structure, and the anti-slip sleeve 9 can play an anti-slip effect.

[0027] A mounting ring 12 is fixedly connected to the front end of the main pipe body 1, a lap ring 13 is fixedly connected to the rear surface of the mounting ring 12, a plurality of support rods 14 are fixedly connected to the inside of the main pipe body 1 and at the rear of the mounting ring 12, a fixing ring 15 is fixedly connected to the inner ends of the plurality of support rods 14, a sliding rod 16 is laterally slidably connected to the inside of the fixing ring 15, a lap plate 17 is fixedly connected to the front end of the sliding rod 16, and a spring 18 is laterally fixedly connected between the lap plate 17 and the fixing ring 15.

[0028] The lap ring 13 and the lap sheet 17 are both made of rubber. The outer diameter of the lap sheet 17 is larger than the inner diameter of the lap ring 13 and smaller than the outer diameter of the lap ring 13 .

[0029] When the gas flows from the front end of the main body 1 to its interior, it will push the lap piece 17 backwards, and at this time the lap piece 17 will be separated from the lap ring 13. Since the outer diameter of the lap piece 17 is larger than the inner diameter of the lap ring 13 and smaller than the outer diameter of the lap ring 13, an annular gap will be generated between the two. At this time, the gas can enter the interior of the main body 1 from the front end. When the gas wants to flow from the interior of the main body 1 to the front end, it will drive the lap piece 17 to move forward, causing the lap piece 17 to fit with the lap ring 13. At this time, there is no gap between the two, thus preventing gas from flowing out.

[0030] The spring 18 always applies a force to the lap plate 17 in the direction of the lap ring 13, ensuring that when the device is kept at normal pressure, the lap plate 17 can always fit with the lap ring 13 to achieve a sealing effect.

[0031] A connecting flange 3 is fixedly connected to the rear end of the main pipe body 1 , and a valve 19 is provided on the main pipe body 1 and at the rear of the drum cavity 2 .

[0032] The connecting flange 3 plays a connecting role, and the valve 19 can control the opening and closing of the rear part of the main pipe 1. When hydrogen is filled into the interior, closing the valve 19 can prevent natural gas from entering the interior of the device during this process.

[0033] The working principle of the natural gas hydrogen blending device provided by the utility model is as follows:

[0034] When the device is in use and performing hydrogen blending operations, the hydrogen storage tank is connected to the front end of the main body 1 of the device, and then the staff rotates the threaded rod 6 to control the lifting of the piston block 10. During the lifting of the piston block 10, the hydrogen inside the hydrogen storage tank will enter the drum cavity 2 and the inside of the connecting pipe 4. When the appropriate amount of hydrogen is obtained, the hydrogen storage tank is removed, and then the threaded rod 6 is rotated in the opposite direction to send the hydrogen inside the connecting pipe 4 into the natural gas pipeline or the inside of the storage tank, so as to avoid direct contact between the natural gas and the hydrogen storage tank, thereby avoiding the occurrence of hydrogen contamination.

[0035] Compared with the related art, the natural gas hydrogen blending device provided by the utility model has the following beneficial effects:

[0036] The utility model provides a natural gas hydrogen blending device. By setting a connecting pipe 4, when the device is in use, during the hydrogen blending operation, the hydrogen storage tank is connected to the front end of the main body 1 of the device, and then the staff rotates the threaded rod 6 to control the lifting of the piston block 10. During the lifting of the piston block 10, the hydrogen inside the hydrogen storage tank will enter the drum cavity 2 and the inside of the connecting pipe 4. After obtaining a suitable amount of hydrogen, the hydrogen storage tank is removed, and then the threaded rod 6 is rotated in the opposite direction to send the hydrogen inside the connecting pipe 4 into the natural gas pipeline or the inside of the storage tank, so as to avoid direct contact between the natural gas and the hydrogen storage tank, and also avoid the occurrence of hydrogen contamination.

[0037] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A natural gas hydrogen blending device, characterized in that: It comprises a main body (1), the middle part of which expands outwards to form a drum cavity (2); A connecting pipe (4), the connecting pipe (4) is vertically fixedly connected to the outer surface of the drum cavity (2) of the main body (1), the top end of the connecting pipe (4) is laterally fixedly connected to a closing cover, the top end of the closing cover is vertically penetrated with a mounting opening, the inside of the mounting opening is fixedly connected to a threaded sleeve (5), the inside of the threaded sleeve (5) is vertically threadedly connected to a threaded rod (6), the bottom end of the threaded rod (6) extends to the bottom end of the inside of the connecting pipe (4) and is rotatably connected to a piston block (10), the outer surface of the piston block (10) is interference fit with the inner surface of the connecting pipe (4).

2. The natural gas hydrogen blending device according to claim 1, characterized in that: The top end of the piston block (10) is vertically fixedly connected to a plurality of guide rods (11), and the top ends of the plurality of guide rods (11) can slidably penetrate the closing cover and extend upward.

3. The natural gas hydrogen blending device according to claim 1, characterized in that: The top end of the threaded rod (6) is fixedly connected to a connection block (7), the outer surface of the connection block (7) is laterally fixedly connected to a rotating handle (8), and the handle surface of the rotating handle (8) is covered with an anti-slip cover (9).

4. The natural gas hydrogen blending device according to claim 1, characterized in that: The front end of the main pipe body (1) is fixedly connected to a mounting ring (12), the rear surface of the mounting ring (12) is fixedly connected to a lap ring (13), the interior of the main pipe body (1) and located at the rear of the mounting ring (12) are fixedly connected to a plurality of support rods (14), the inner ends of the plurality of support rods (14) are fixedly connected to a fixing ring (15), the interior of the fixing ring (15) is laterally slidably connected to a slide rod (16), the front end of the slide rod (16) is fixedly connected to a lap plate (17), and a spring (18) is laterally fixedly connected between the lap plate (17) and the fixing ring (15).

5. The natural gas hydrogen blending device according to claim 4, characterized in that: The lap ring (13) and the lap sheet (17) are both made of rubber material, and the outer diameter of the lap sheet (17) is larger than the inner diameter of the lap ring (13) and smaller than the outer diameter of the lap ring (13).

6. The natural gas hydrogen blending device according to claim 1, characterized in that: A connecting flange (3) is fixedly connected to the rear end of the main pipe body (1), and a valve (19) is arranged on the main pipe body (1) and at the rear of the drum cavity (2).

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