Hydrogen pressure stabilizing and metering device

Abstract

The utility model discloses a hydrogen pressure stabilizing and metering device, which relates to the technical field of hydrogen fuel filling equipment and comprises an exhaust pipe, a stabilizing mechanism arranged below the exhaust pipe, a gas guide pipe fixedly communicated with the left end of the exhaust pipe, an electromagnetic valve arranged inside the gas guide pipe, a pressure sensor arranged inside the exhaust pipe and a flow meter arranged inside the exhaust pipe. The outer surface of the exhaust pipe fixedly communicates with a communicating pipe, the left end of the communicating pipe fixedly communicates with the outer surface of the gas guide pipe, a manual valve is arranged in the communicating pipe, and a filtering mechanism is arranged above the stabilizing mechanism and comprises a shell. Through the arrangement of the exhaust pipe and the filtering mechanism, impurities in hydrogen can be filtered by utilizing the filtering mechanism during use, so that the hydrogen entering the exhaust pipe is ensured to be pure enough, and the problem that the purity of the hydrogen entering the exhaust pipe cannot be ensured due to the fact that an existing device is not provided with a corresponding filtering device is solved; and the accuracy of a metering result is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen fuel filling equipment, in particular to a hydrogen pressure stabilizing and metering device. Background Art

[0002] At present, the transportation of hydrogen is a weak link in the development of the entire hydrogen industry, and its economy and safety need to be improved. However, in the foreseeable future, from the perspective of economic analysis of hydrogen transportation solutions, the national hydrogen storage and transportation infrastructure will build a hydrogen transportation trunk road from large-scale hydrogen enterprises to urban gateways. Its low transportation cost will be conducive to the layout of large-scale hydrogen enterprises in areas with low production costs. In the future, pipeline transportation of hydrogen will be the method with the least energy loss and the safest way to transport hydrogen over medium and short distances. On this basis, it is also necessary to study and design pipeline transportation of hydrogen systems and safe and reliable hydrogen metering and filling equipment in terminal hydrogen filling stations.

[0003] According to the patent with the announcement number CN213420658U, a natural gas metering and pressure stabilizing device is disclosed. The natural gas metering and pressure stabilizing device comprises an intake pipe, a control chamber is installed at one end of the intake pipe, an exhaust pipe is arranged at the end of the control chamber away from the intake pipe, a first pressure sensor is arranged on the intake pipe, and a second pressure sensor is arranged at the end of the exhaust pipe close to the control chamber.

[0004] By adopting the above scheme, the pressure inside the exhaust pipe can be monitored at all times through the cooperation of the first pressure sensor, the second pressure sensor, the processor, the flow meter and the motor, and the rotation of the turntable can be controlled, so that the pressure adjustment is faster and more timely, and the practicality is higher. However, the above device has limitations in actual use. Since it is not equipped with a corresponding filtering device, the purity of the hydrogen entering the exhaust pipe cannot be guaranteed, and once impurities are mixed in, it is bound to affect the accuracy of the metering result. For this reason, we provide a hydrogen pressure stabilizing metering device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and provide a hydrogen pressure stabilizing and metering device.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydrogen pressure-stabilizing and metering device, comprising an exhaust pipe, a stabilizing mechanism is provided at the bottom of the exhaust pipe, the left end of the exhaust pipe is fixedly connected with an air guide pipe, an electromagnetic valve is provided inside the air guide pipe, a pressure sensor is provided inside the exhaust pipe, a flow meter is provided inside the exhaust pipe, a connecting pipe is fixedly connected to the outer surface of the exhaust pipe, the left end of the connecting pipe is fixedly connected to the outer surface of the air guide pipe, a manual valve is provided inside the connecting pipe, a filtering mechanism is provided above the stabilizing mechanism, the filtering mechanism comprises a shell, the left end of the air guide pipe is fixedly connected to the right side surface of the shell, and the left side surface of the shell is fixedly connected to an intake pipe.

[0007] Furthermore, the stabilizing mechanism includes a base plate, a group of threaded holes are opened on the upper surface of the base plate, two symmetrical first support rods are fixedly connected to the upper surface of the base plate, and support blocks are fixedly connected to the upper surfaces of the two first support rods.

[0008] Furthermore, the upper surface of one of the support blocks is fixedly connected to the outer surface of the exhaust pipe, the upper surface of the other support block is fixedly connected to the outer surface of the air duct, and the upper surface of the base plate is fixedly connected to two symmetrical second support rods, and the outer surfaces of the two second support rods are fixedly connected to the outer surface of the outer shell.

[0009] Furthermore, the filtering mechanism includes a support plate, the upper surface of which is fixedly connected to the bottom surface of the shell, the upper surface of which is fixedly connected to a sealing plate, and the outer surface of which is plugged into the interior of the shell.

[0010] Furthermore, a palladium-silver alloy plate is fixedly connected to the upper surface of the support plate, a filter screen is fixedly connected to the interior of the shell, and a motor is fixedly connected to the outer surface of the shell.

[0011] Furthermore, a reciprocating screw is fixedly connected to the output end of the motor, an outer surface of the reciprocating screw is rotatably connected to the inside of the housing, and a moving block is threadedly connected to the outer surface of the reciprocating screw.

[0012] Furthermore, the interior of the shell is fixedly connected to a limiting rod, the interior of the moving block is slidably connected to the outer surface of the limiting rod, and the outer surface of the moving block is fixedly connected to a scraper.

[0013] Compared with the prior art, the hydrogen pressure stabilizing and metering device has the following beneficial effects:

[0014] The utility model provides an exhaust pipe and a filtering mechanism. When in use, the filtering mechanism can filter impurities in hydrogen to ensure that the hydrogen entering the exhaust pipe is sufficiently pure, thereby solving the problem that the purity of the hydrogen entering the exhaust pipe cannot be guaranteed due to the lack of a corresponding filtering device in the existing device, and effectively ensuring the accuracy of the measurement result.

[0015] The utility model is provided with an exhaust pipe, a base plate, a threaded hole, a first support rod, a support block, a second support rod, an outer shell and an air duct. When in use, the base plate is fixed by screwing screws into the threaded holes, and then the support blocks on the tops of the two first support rods are respectively fixed to the surfaces of the exhaust pipe and the air duct, and the second support rod is fixed to the surface of the outer shell, so as to achieve limited fixation of the entire device and improve the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional front view structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the stabilizing mechanism of the utility model;

[0018] Figure 3 It is a schematic diagram of the filtering mechanism of the utility model;

[0019] Figure 4 The following is a schematic diagram of the partial structure of the filter mechanism of the utility model. Figure 1 ;

[0020] Figure 5 The following is a schematic diagram of the partial structure of the filter mechanism of the utility model. Figure 2 .

[0021] In the figure: 1. exhaust pipe; 2. stabilizing mechanism; 201. bottom plate; 202. threaded hole; 203. first support rod; 204. support block; 205. second support rod; 3. solenoid valve; 4. pressure sensor; 5. flow meter; 6. connecting pipe; 7. manual valve; 8. filtering mechanism; 801. housing; 802. support plate; 803. sealing plate; 804. palladium-silver alloy plate; 805. filter screen; 806. motor; 807. reciprocating screw; 808. moving block; 809. limit rod; 810. scraper; 9. intake pipe; 10. air guide pipe. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] The present embodiment provides a hydrogen pressure-stabilizing metering device, which provides an exhaust pipe 1 and a filtering mechanism 8. When in use, the filtering mechanism 8 can filter impurities in the hydrogen to ensure that the hydrogen entering the exhaust pipe 1 is sufficiently pure, thereby solving the problem in the prior art that the purity of the hydrogen entering the exhaust pipe 1 cannot be guaranteed due to the lack of a corresponding filtering device, and effectively ensuring the accuracy of the metering result.

[0024] See also Figure 1 to Figure 5 A hydrogen pressure stabilizing and metering device comprises an exhaust pipe 1, and a stabilizing mechanism 2 is arranged below the exhaust pipe 1.

[0025] The stabilizing mechanism 2 includes a base plate 201 , a group of threaded holes 202 are formed on the upper surface of the base plate 201 , two symmetrical first support rods 203 are fixedly connected to the upper surface of the base plate 201 , and support blocks 204 are fixedly connected to the upper surfaces of the two first support rods 203 .

[0026] The upper surface of one of the support blocks 204 is fixedly connected to the outer surface of the exhaust pipe 1, the upper surface of the other support block 204 is fixedly connected to the outer surface of the air duct 10, and the upper surface of the base plate 201 is fixedly connected to two symmetrical second support rods 205, and the outer surfaces of the two second support rods 205 are fixedly connected to the outer surface of the outer shell 801.

[0027] When in use, the bottom plate 201 is fixed by screwing a screw into the threaded hole 202, and then the support blocks 204 on the top of the two first support rods 203 are fixed to the surfaces of the exhaust pipe 1 and the air duct 10 respectively, and the second support rod 205 is fixed to the surface of the outer shell 801, so as to achieve the limit fixation of the entire device to improve the stability of the device.

[0028] The left end of the exhaust pipe 1 is fixedly connected to an air guide pipe 10 , an electromagnetic valve 3 is arranged inside the air guide pipe 10 , a pressure sensor 4 is arranged inside the exhaust pipe 1 , and a flow meter 5 is arranged inside the exhaust pipe 1 .

[0029] The pressure sensor 4 and the flow meter 5 are electrically connected to the external controller through wires, and the external controller is electrically connected to the solenoid valve 3 through wires. When the hydrogen usage rate is fast, the pressure sensor 4 detects the pressure in the exhaust pipe 1 and transmits the signal to the external controller. The external controller controls the opening of the solenoid valve 3 and reduces the opening degree of the solenoid valve 3 to reduce the pressure in the exhaust pipe 1. The solenoid valve 3, the pressure sensor 4, the flow meter 5 and the external controller are all prior arts.

[0030] A connecting pipe 6 is fixedly connected to the outer surface of the exhaust pipe 1 , and the left end of the connecting pipe 6 is fixedly connected to the outer surface of the air guide pipe 10 . A manual valve 7 is provided inside the connecting pipe 6 .

[0031] When the intelligent control system fails, the user can manually adjust the pressure in the solenoid valve 3 through the manual valve 7 .

[0032] A filtering mechanism 8 is provided above the stabilizing mechanism 2 , and the filtering mechanism 8 includes a housing 801 .

[0033] The filtering mechanism 8 includes a support plate 802 , the upper surface of which is fixedly connected to the bottom surface of the housing 801 , and a sealing plate 803 is fixedly connected to the upper surface of the support plate 802 , and the outer surface of the sealing plate 803 is plugged into the interior of the housing 801 .

[0034] The support plate 802 and the outer shell 801 are fixed by bolts and nuts, and are a detachable connection, which not only makes it easy to remove solid impurities that fall on the support plate 802 from the outer shell 801 later, but also makes it easy to take out the palladium-silver alloy plate 804 for processing later. The sealing plate 803 is made of rubber, which can effectively improve the sealing of the outer shell 801 and prevent hydrogen from escaping from the gap between the outer shell 801 and the support plate 802.

[0035] A palladium-silver alloy plate 804 is fixedly connected to the upper surface of the support plate 802 , a filter screen 805 is fixedly connected to the interior of the housing 801 , and a motor 806 is fixedly connected to the outer surface of the housing 801 .

[0036] The palladium-silver alloy plate 804 is an existing technology, which has a strong hydrogen permeability and can filter gases such as oxygen, nitrogen, and carbon dioxide in hydrogen to achieve the purpose of purifying hydrogen. The filter 805 can filter solid impurities in the hydrogen. The bearing at the output end of the motor 806 is a sealed bearing to prevent hydrogen from escaping.

[0037] The output end of the motor 806 is fixedly connected with a reciprocating screw 807 , the outer surface of the reciprocating screw 807 is rotatably connected to the inside of the housing 801 , and the outer surface of the reciprocating screw 807 is threadedly connected with a moving block 808 .

[0038] The interior of the housing 801 is fixedly connected with a limit rod 809 , the interior of the moving block 808 is slidably connected with the outer surface of the limit rod 809 , and the outer surface of the moving block 808 is fixedly connected with a scraper 810 .

[0039] The limiting rod 809 can limit the moving block 808 to prevent the moving block 808 from deviating from its movement trajectory.

[0040] When in use, hydrogen enters the housing 801 from the intake pipe 9, wherein solid impurities in the hydrogen will be filtered by the filter 805, while gases such as oxygen, nitrogen, and carbon dioxide in the hydrogen will be filtered by the palladium-silver alloy plate 804. The cooperation of the two can ensure the purity of the hydrogen entering the exhaust pipe 1. After a period of use, the motor 806 is turned on to drive the reciprocating screw 807 to rotate. Under the limiting action of the limiting rod 809, the moving block 808 is driven to reciprocate, and the scraper 810 is driven to move, so that the solid impurities attached to the filter 805 can be scraped off to ensure the air permeability of the filter 805 and avoid affecting the filtering effect of the filter 805. At the same time, since the housing 801 and the support plate 802 are detachably connected, the device can facilitate the solid impurities falling on the support plate 802 to be cleared out of the housing 801, and it is also convenient to take out the palladium-silver alloy plate 804 for processing later. By setting this mechanism, the accuracy of the measurement result is effectively guaranteed.

[0041] The left end of the air guide pipe 10 is fixedly connected to the right side surface of the housing 801 , and the left side surface of the housing 801 is fixedly connected to the air intake pipe 9 .

[0042] Working principle: When in use, the bottom plate 201 is fixed by screwing a screw into the threaded hole 202, and then the support blocks 204 on the top of the two first support rods 203 are fixed to the surfaces of the exhaust pipe 1 and the air duct 10 respectively, and the second support rod 205 is fixed to the surface of the outer shell 801, so as to achieve the limit fixation of the entire device to improve the stability of the device. When in use, hydrogen enters the housing 801 from the intake pipe 9, wherein solid impurities in the hydrogen will be filtered by the filter 805, while gases such as oxygen, nitrogen, and carbon dioxide in the hydrogen will be filtered by the palladium-silver alloy plate 804. The cooperation of the two can ensure the purity of the hydrogen entering the exhaust pipe 1. After a period of use, the motor 806 is turned on to drive the reciprocating screw 807 to rotate. Under the limiting action of the limiting rod 809, the moving block 808 is driven to reciprocate, and the scraper 810 is driven to move, so that the solid impurities attached to the filter 805 can be scraped off to ensure the air permeability of the filter 805 and avoid affecting the filtering effect of the filter 805. At the same time, since the housing 801 and the support plate 802 are detachably connected, the device can facilitate the solid impurities falling on the support plate 802 to be cleared out of the housing 801, and it is also convenient to take out the palladium-silver alloy plate 804 for processing later. By setting this mechanism, the accuracy of the measurement result is effectively guaranteed.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydrogen pressure stabilizing and metering device, comprising an exhaust pipe (1), characterized in that: A stabilizing mechanism (2) is provided below the exhaust pipe (1); the left end of the exhaust pipe (1) is fixedly connected to an air guide pipe (10); a solenoid valve (3) is provided inside the air guide pipe (10); a pressure sensor (4) is provided inside the exhaust pipe (1); a flow meter (5) is provided inside the exhaust pipe (1); a connecting pipe (6) is fixedly connected to the outer surface of the exhaust pipe (1); the left end of the connecting pipe (6) is fixedly connected to the outer surface of the air guide pipe (10); a manual valve (7) is provided inside the connecting pipe (6); a filtering mechanism (8) is provided above the stabilizing mechanism (2); the filtering mechanism (8) comprises a shell (801); the left end of the air guide pipe (10) is fixedly connected to the right side surface of the shell (801); and the left side surface of the shell (801) is fixedly connected to an intake pipe (9).

2. A hydrogen pressure stabilizing and metering device according to claim 1, characterized in that: The stabilizing mechanism (2) comprises a bottom plate (201), the upper surface of the bottom plate (201) being provided with a group of threaded holes (202), the upper surface of the bottom plate (201) being fixedly connected to two symmetrical first support rods (203), and the upper surfaces of the two first support rods (203) being fixedly connected to support blocks (204).

3. A hydrogen pressure stabilizing and metering device according to claim 2, characterized in that: The upper surface of one of the support blocks (204) is fixedly connected to the outer surface of the exhaust pipe (1), the upper surface of the other support block (204) is fixedly connected to the outer surface of the air guide pipe (10), and the upper surface of the bottom plate (201) is fixedly connected to two symmetrical second support rods (205), and the outer surfaces of the two second support rods (205) are fixedly connected to the outer surface of the outer shell (801).

4. A hydrogen pressure stabilizing and metering device according to claim 1, characterized in that: The filtering mechanism (8) comprises a support plate (802), the upper surface of the support plate (802) being fixedly connected to the bottom surface of the outer shell (801), the upper surface of the support plate (802) being fixedly connected to a sealing plate (803), and the outer surface of the sealing plate (803) being plugged into the interior of the outer shell (801).

5. A hydrogen pressure stabilizing and metering device according to claim 4, characterized in that: A palladium-silver alloy plate (804) is fixedly connected to the upper surface of the support plate (802), a filter screen (805) is fixedly connected to the interior of the housing (801), and a motor (806) is fixedly connected to the outer surface of the housing (801).

6. A hydrogen pressure stabilizing and metering device according to claim 5, characterized in that: The output end of the motor (806) is fixedly connected to a reciprocating screw rod (807), the outer surface of the reciprocating screw rod (807) is rotatably connected to the inside of the housing (801), and the outer surface of the reciprocating screw rod (807) is threadedly connected to a moving block (808).

7. A hydrogen pressure stabilizing and metering device according to claim 6, characterized in that: The interior of the housing (801) is fixedly connected to a limiting rod (809), the interior of the moving block (808) is slidably connected to the outer surface of the limiting rod (809), and the outer surface of the moving block (808) is fixedly connected to a scraper (810).

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