Gas filling pressure adjusting device of hydrogen filling station

Abstract

The utility model discloses a gas filling pressure regulating device of a hydrogen filling station in the technical field of hydrogen pressure regulation, which comprises a first gas delivery pipe, the bottom of the first gas delivery pipe is fixedly connected with a pressure relief pipe, the pressure relief pipe is L-shaped, and the right side of the inner cavity of the pressure relief pipe is fixedly provided with a telescopic rod; a pressure relief pipe is arranged, the telescopic rod is fixedly installed in the pressure relief pipe, when the air pressure in the first air conveying pipe is too high, the air pressure pushes the sealing cover to the right side, and after the sealing cover moves, a pressure relief opening is communicated with the interior of the first air conveying pipe; when the air pressure returns to normal, the sealing cover returns to the original position under the action of the telescopic spring, the effect that the air pressure in the first air conveying pipe is automatically relieved when the air pressure is too high under the action of the telescopic rod and the telescopic spring is achieved, operation is easy, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen pressure regulation, in particular to a gas filling pressure regulation device for a hydrogen filling station. Background Technique

[0002] A hydrogen filling station is a gas station that provides hydrogen for fuel cell vehicles. As the infrastructure for providing hydrogen for fuel cell vehicles, the number of hydrogen filling stations is also increasing. When filling hydrogen at a hydrogen filling station, if the hydrogen filling pressure is too high, it will affect the purity of hydrogen in the machine, and when it exceeds the bearing capacity of the hydrogen storage device, it will also cause safety problems such as hydrogen leakage. Therefore, when filling hydrogen, it is necessary to regulate the gas filling pressure.

[0003] The existing patent publication number is CN211770295U, which discloses a device for purifying and recovering hydrogen from hydrogen-containing fuel gas. In the device, a cold dryer is connected to a filter, the filter is connected to a membrane separator, the membrane separator is connected to a vacuum pump, the vacuum pump is connected to a hydrogen-rich gas compressor, one end of a pressure regulating valve is arranged between the membrane separator and the vacuum pump, and the other end is arranged between the vacuum pump and the hydrogen-rich gas compressor. The membrane separator, the vacuum pump and the pressure regulating valve are connected through a reflux pipeline; the hydrogen-rich gas compressor is connected to a pressure swing adsorption hydrogen purification device, the pressure swing adsorption hydrogen purification device is connected to a desorbed gas compressor, and the other end of the desorbed gas compressor is connected to the cold dryer; the hydrogen product is output through the pressure swing adsorption hydrogen purification device, and the remaining fuel gas is output through the membrane separator. In the utility model, the hydrogen permeation efficiency on the membrane surface can be increased by 15% - 40%, the energy consumption and operation cost of the membrane separation device are significantly reduced, and a hydrogen product with a purity of 99.9% - 99.999% can be obtained in cooperation with the pressure swing adsorption hydrogen purification device.

[0004] When the existing hydrogen filling station fills gas, due to the phenomenon of too high or too low air pressure during hydrogen filling, the hydrogen filling is not stable enough, affecting the efficiency of hydrogen filling. For this reason, we propose a gas filling pressure regulation device for a hydrogen filling station to solve the above-mentioned problems. Content of the Utility Model

[0005] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and the name of the utility model of the specification, to avoid obscuring the purpose of this part, the abstract of the specification and the name of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0006] Therefore, the purpose of the utility model is to provide a gas filling pressure regulation device for a hydrogen filling station, which can solve the problem that when the existing hydrogen filling station fills gas, due to the phenomenon of too high or too low air pressure during hydrogen filling, the hydrogen filling is not stable enough, affecting the efficiency of hydrogen filling.

[0007] To solve the above technical problems, the utility model provides a gas filling pressure regulating device for a hydrogen filling station, adopting the following technical solutions: It includes a first gas transmission pipe, a pressure relief pipe is fixedly connected to the bottom of the first gas transmission pipe. The pressure relief pipe is in an L shape, and a telescopic rod is fixedly installed on the right side of the inner cavity of the pressure relief pipe. A sealing cover is fixedly installed at the left end of the telescopic rod. A telescopic spring is sleeved outside the telescopic rod, and the telescopic spring is located between the right side of the sealing cover and the right inner wall of the pressure relief pipe. A pressure relief opening is provided at the bottom of the pressure relief pipe.

[0008] Optionally, a connecting pipe is fixedly connected to the bottom of the pressure relief pipe, and a first gas storage tank is fixedly installed at the bottom of the connecting pipe.

[0009] Optionally, a first butterfly valve is rotatably connected to the inner cavity of the connecting pipe, a first electric cylinder is fixedly installed on the right side of the connecting pipe, and the output end of the first electric cylinder is fixedly connected to the right end of the first butterfly valve.

[0010] Optionally, a bracket is fixedly installed on the top of the first gas transmission pipe, and a pressure detection meter is fixedly installed on the top of the bracket.

[0011] Optionally, the bottom end of the bracket penetrates the surface of the first gas transmission pipe, and the bottom end of the bracket extends into the first gas transmission pipe, and a pressure detector is fixedly installed at the bottom of the bracket.

[0012] Optionally, a second gas transmission pipe is fixedly connected to the top of the first gas transmission pipe, a second gas storage tank is fixedly installed on the left side of the second gas transmission pipe, a second butterfly valve is rotatably connected to the inner cavity of the second gas transmission pipe, a second electric cylinder is fixedly installed on the top of the second gas transmission pipe, and the output end of the second electric cylinder is fixedly connected to the top of the second butterfly valve.

[0013] Optionally, a third gas storage tank is fixedly installed on the left side of the first gas transmission pipe, and the third gas storage tank is located at the bottom of the second gas storage tank.

[0014] In summary, the utility model has at least the following beneficial effects: 1. By setting the pressure relief pipe and fixedly installing a telescopic rod inside the pressure relief pipe, when the air pressure inside the first gas transmission pipe is too high, the air pressure pushes the sealing cover to the right. After the sealing cover moves, at this time, the pressure relief opening is communicated with the inside of the first gas transmission pipe, and the air pressure can be relieved from the pressure relief opening. When the air pressure returns to normal, the sealing cover returns to its original position under the action of the telescopic spring, achieving the effect of automatically relieving the air pressure inside the first gas transmission pipe when the air pressure is too high through the action of the telescopic rod and the telescopic spring. The operation is simple and the practicability is strong.

[0015] 2. By setting a pressure detector, when the air pressure inside the first gas pipeline is too low, the second electric cylinder is started. The second electric cylinder drives the second butterfly valve to rotate. At this time, the air pressure inside the second gas storage tank can be supplemented into the first gas pipeline through the second gas pipeline, thereby increasing the air pressure inside the first gas pipeline. When the pressure detector detects that the air pressure is normal, the second butterfly valve is closed, thus achieving automatic air pressure filling inside the first gas pipeline, with strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic cross-sectional view of the interior of the overall structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the partial structure of the pressure relief pipe of the present invention;

[0020] Figure 4 It is a schematic diagram of the partial structure of the second gas pipeline of the present invention.

[0021] Description of the reference numerals: 1. First gas pipeline; 2. Pressure relief pipe; 3. Telescopic rod; 4. Sealing cover; 5. Telescopic spring; 6. Pressure relief port; 7. Connecting pipe; 8. First gas storage tank; 9. First butterfly valve; 10. First electric cylinder; 11. Bracket; 12. Pressure detection meter; 13. Pressure detector; 14. Second gas pipeline; 15. Second gas storage tank; 16. Second butterfly valve; 17. Second electric cylinder; 18. Third gas storage tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will further describe the present invention in detail Figures 1-4 with reference to the accompanying drawings.

[0023] Embodiment 1. Referring to Figures 1-4 , in this embodiment, in order to solve the problem that in the existing hydrogen filling station during gas filling, due to the phenomenon of too high or too low air pressure during hydrogen filling, the hydrogen filling is not stable enough, affecting the efficiency of hydrogen filling. The present invention discloses a device for adjusting the filling pressure of a hydrogen filling station.

[0024] It includes a first gas pipeline 1. A pressure relief pipe 2 is fixedly connected to the bottom of the first gas pipeline 1. The pressure relief pipe 2 is in an L shape, and a telescopic rod 3 is fixedly installed on the right side of the inner cavity of the pressure relief pipe 2. A sealing cover 4 is fixedly installed at the left end of the telescopic rod 3. A telescopic spring 5 is sleeved outside the telescopic rod 3. The telescopic spring 5 is located between the right side of the sealing cover 4 and the right inner wall of the pressure relief pipe 2. A pressure relief port 6 is opened at the bottom of the pressure relief pipe 2.

[0025] A connecting pipe 7 is fixedly connected to the bottom of the pressure relief pipe 2. A first gas storage tank 8 is fixedly installed at the bottom of the connecting pipe 7.

[0026] A first butterfly valve 9 is rotatably connected to the inner cavity of the connecting pipe 7. A first electric cylinder 10 is fixedly installed on the right side of the connecting pipe 7. The output end of the first electric cylinder 10 is fixedly connected to the right end of the first butterfly valve 9.

[0027] A bracket 11 is fixedly installed at the top of the first gas pipeline 1. A pressure detection meter 12 is fixedly installed at the top of the bracket 11.

[0028] The bottom end of the bracket 11 penetrates the surface of the first gas pipeline 1, and the bottom end of the bracket 11 extends into the first gas pipeline 1. A pressure detector 13 is fixedly installed at the bottom of the bracket 11.

[0029] A second gas pipeline 14 is fixedly connected to the top of the first gas pipeline 1. A second gas storage tank 15 is fixedly installed on the left side of the second gas pipeline 14. A second butterfly valve 16 is rotatably connected to the inner cavity of the second gas pipeline 14. A second electric cylinder 17 is fixedly installed at the top of the second gas pipeline 14. The output end of the second electric cylinder 17 is fixedly connected to the top of the second butterfly valve 16.

[0030] A third gas storage tank 18 is fixedly installed on the left side of the first gas pipeline 1. The third gas storage tank 18 is located at the bottom of the second gas storage tank 15.

[0031] The specific working principle is as follows: By setting the pressure relief pipe 2 and fixedly installing a telescopic rod 3 inside the pressure relief pipe 2, when the air pressure inside the first gas pipeline 1 is too high, the air pressure will push the sealing cover 4 to the right. After the sealing cover 4 moves, at this time, the pressure relief port 6 is communicated with the inside of the first gas pipeline 1, and the air pressure can be relieved from the pressure relief port 6. When the air pressure returns to normal, the sealing cover 4 returns to its original position under the action of the telescopic spring 5, so that through the action of the telescopic rod 3 and the telescopic spring 5, the effect of automatically relieving the air pressure inside the first gas pipeline 1 when the air pressure is too high is achieved. By setting the pressure detector 13, when the air pressure inside the first gas pipeline 1 is too low, the second electric cylinder 17 is started. The second electric cylinder 17 starts to drive the second butterfly valve 16 to rotate. At this time, the air pressure inside the second gas storage tank 15 can be supplemented into the first gas pipeline 1 through the second gas pipeline 14, so as to increase the air pressure inside the first gas pipeline 1. When the pressure detector 13 detects that the air pressure is normal, the second butterfly valve 16 is closed, so as to achieve the effect of automatically filling the air pressure inside the first gas pipeline 1.

[0032] The wiring diagram of the cylinder in the present utility model belongs to the common general knowledge in the field, and its working principle is already known technology. Its model is selected according to actual use, so the control method and wiring layout of the cylinder will not be explained in detail.

[0033] The above are all the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited hereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A gas filling pressure regulating device for a hydrogen filling station, comprising a first gas transmission pipe (1), characterized in that: The bottom of the first gas delivery pipe (1) is fixedly connected to a pressure relief pipe (2), the pressure relief pipe (2) is L-shaped, and a telescopic rod (3) is fixedly installed on the right side of the inner cavity of the pressure relief pipe (2), and a sealing cover (4) is fixedly installed on the left end of the telescopic rod (3). A telescopic spring (5) is sleeved on the outside of the telescopic rod (3), and the telescopic spring (5) is located between the right side of the sealing cover (4) and the right inner wall of the pressure relief pipe (2). A pressure relief port (6) is opened at the bottom of the pressure relief pipe (2), and the top of the first gas delivery pipe (1) is fixedly installed. A support (11) is provided, a pressure detection gauge (12) is fixedly installed on the top of the support (11), a second gas pipeline (14) is fixedly connected to the top of the first gas pipeline (1), a second gas storage tank (15) is fixedly installed on the left side of the second gas pipeline (14), a second butterfly valve (16) is rotatably connected to the inner cavity of the second gas pipeline (14), a second electric cylinder (17) is fixedly installed on the top of the second gas pipeline (14), and the output end of the second electric cylinder (17) is fixedly connected to the top of the second butterfly valve (16).

2. The gas filling pressure regulating device of a hydrogen filling station according to claim 1, characterized in that: The bottom of the pressure relief pipe (2) is fixedly connected to a connecting pipe (7), and the bottom of the connecting pipe (7) is fixedly installed with a first gas storage tank (8).

3. The gas filling pressure regulating device of a hydrogen filling station according to claim 2, characterized in that: The inner cavity of the connecting pipe (7) is rotatably connected to a first butterfly valve (9), a first electric cylinder (10) is fixedly installed on the right side of the connecting pipe (7), and an output end of the first electric cylinder (10) is fixedly connected to the right end of the first butterfly valve (9).

4. The gas filling pressure regulating device of a hydrogen filling station according to claim 1, characterized in that: The bottom end of the bracket (11) passes through the surface of the first gas pipe (1), and the bottom end of the bracket (11) extends into the interior of the first gas pipe (1), and a pressure detector (13) is fixedly mounted on the bottom of the bracket (11).

5. The gas filling pressure regulating device of a hydrogen filling station according to claim 1, characterized in that: A third gas storage tank (18) is fixedly mounted on the left side of the first gas delivery pipe (1), and the third gas storage tank (18) is located at the bottom of the second gas storage tank (15).

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