Multi-gas hydrogen-mixing pressurizing circulating device

Abstract

The utility model relates to the technical field of multi-gas mixing experiments, and particularly discloses a multi-gas hydrogen mixing pressurizing circulating device which comprises a hydrogen inlet mechanism, and the hydrogen inlet mechanism comprises a hydrogen source, a first stop valve, a first pressure gauge, a first pressure transmitter, a first pressure reducing valve, a first pneumatic needle valve and a first one-way valve which are connected in sequence; a second air inlet mechanism and a third air inlet mechanism; the hydrogen inlet mechanism, the second gas inlet mechanism and the third gas inlet mechanism are connected with the inlet pneumatic needle valve in parallel; the pressurization circulation mechanism comprises a stirring kettle, a pressurization gas circuit cabinet and a compatibility experiment kettle, and the mixed gas enters the compatibility experiment kettle from the stirring kettle through the pressurization gas circuit cabinet and flows back to the stirring kettle from the compatibility experiment kettle through a second circulation backflow branch; the multi-gas hydrogen mixing experiment device overcomes the defects that in a multi-gas hydrogen mixing experiment in the prior art, mixed gas is prone to standing and layering, unused gas is wasted after the experiment, and flow pressure cannot be regulated and controlled.

Description

Technical Field

[0001] The utility model relates to the field of multi-gas mixing experiments, in particular to a multi-gas mixed hydrogen pressurizing circulation device. Background Art

[0002] In stress corrosion testing of metal materials in a hydrogen-gas mixture, the presence of hydrogen in a specific corrosive environment, such as a wet environment containing hydrogen sulfide (H2S), can simulate and predict specific data on stress corrosion, thereby improving the metal material. This phenomenon is particularly important in fields such as petrochemicals and natural gas transportation, as the working environments in these fields often involve high pressure, high temperature, and complex chemical media, all of which may promote the occurrence of stress corrosion.

[0003] In the existing technology, the experiment has problems such as the flow rate and pressure of the mixed gas being difficult to control during the gas distribution process, the mixed gas entering the buffer container and being allowed to stand and stratify, it being difficult to maintain the gas mixing state during the test, and the mixed gas being unable to be recycled after entering the compatibility test kettle through pressurization. Utility Model Content

[0004] (1) Technical issues to be resolved

[0005] The problem to be solved by the utility model is to provide a multi-gas hydrogen mixing pressurization circulation device to overcome the defects of the prior art in multi-gas hydrogen mixing experiments, such as the mixed gas is easy to be stratified when standing, the unused gas is wasted after the test, and the flow pressure cannot be controlled.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a multi-gas mixed hydrogen pressurized circulation device, comprising:

[0008] A hydrogen gas intake mechanism, comprising a hydrogen gas source, a first stop valve, a first pressure gauge, a first pressure transmitter, a first pressure reducing valve, a first pneumatic needle valve, and a first one-way valve connected in sequence;

[0009] a second air intake mechanism and a third air intake mechanism, wherein the second air intake mechanism is provided with a second air source, and the third air intake mechanism is provided with a third air source, the second air source and the third air source are respectively connected in sequence to a second shut-off valve, a second pressure gauge, a second pressure transmitter, a second pressure reducing valve, a second pneumatic needle valve, and a second one-way valve, and the hydrogen air intake mechanism, the second air intake mechanism, and the third air intake mechanism are connected in parallel to the inlet pneumatic needle valve;

[0010] The pressurized circulation mechanism includes a stirring kettle, a pressurized air circuit cabinet, and a compatibility test kettle. The inlet pneumatic needle valve is connected to the air inlet of the stirring kettle, and the air outlet of the stirring kettle is connected to the pressurized air circuit cabinet. The pressurized air circuit cabinet is connected to the compatibility test kettle. The compatibility test kettle is connected to the inlet pneumatic needle valve through a first circulation reflux branch, and the inlet pneumatic needle valve is connected to the air inlet of the stirring kettle through a second circulation reflux branch.

[0011] As described above, the multi-gas mixed hydrogen pressurized circulation device, optionally, the stirring kettle includes an explosion-proof motor, a top cover, a shell, a transmission shaft and fan blades, the top cover is connected to the shell by bolts, the explosion-proof motor is arranged on the top cover, the transmission shaft is connected to the output end of the explosion-proof motor, and the fan blades are connected to the transmission shaft.

[0012] As described above, for the multi-gas mixed hydrogen pressurized circulation device, optionally, a sealing ring is provided between the top cover and the shell.

[0013] As described above, in the multi-gas mixed hydrogen pressurized circulation device, optionally, the fan blades are three, and the three fan blades are distributed in a row around the circumference of the transmission shaft.

[0014] As described above, in the multi-gas mixed hydrogen pressurized circulation device, optionally, a first flow meter is provided between the first pressure reducing valve and the first pneumatic needle valve.

[0015] As described above, in the multi-gas mixed hydrogen pressurized circulation device, optionally, a second flow meter is provided between the second pressure reducing valve and the second pneumatic needle valve.

[0016] As described above, for the multi-gas mixed hydrogen pressurized circulation device, optionally, the second circulation reflux branch is sequentially provided with an outlet pneumatic needle valve, a high-pressure back pressure valve, a buffer kettle, a third pressure transmitter, a third stop valve and a third one-way valve.

[0017] As described above, in the multi-gas mixed hydrogen pressurized circulation device, optionally, a third pressure gauge is provided on the pressure transmitter.

[0018] (3) Beneficial effects

[0019] The utility model provides a multi-gas mixed hydrogen pressurized circulation device, which has the following beneficial effects:

[0020] Hydrogen and various other types of gases are delivered to the inlet pneumatic needle valve through the parallel hydrogen intake mechanism, the second intake mechanism, and the third intake mechanism. The inlet pneumatic needle valve regulates the intake flow of various gases and inputs various gases into the stirring kettle. The stirring kettle delivers the stirred mixed gas to the booster gas circuit cabinet. The mixed gas is transmitted from the booster gas circuit cabinet to the compatibility test kettle. The environmental stress corrosion test of the metal material and hydrogen mixed gas can be completed in the compatibility test kettle. At the same time, the mixed gas that is not consumed during the experiment can flow into the booster gas circuit cabinet through the first circulation reflux branch and return to the stirring kettle through the second circulation reflux branch, thereby avoiding the waste of the mixed gas during the experiment.

[0021] By arranging a first flow meter, a second flow meter, a first pressure transmitter, a second pressure transmitter, and a third pressure transmitter in the device, the inflow / outflow of various types of gases can be monitored. At the same time, the first stop valve can safely regulate the hydrogen intake mechanism according to the monitoring data of the first flow meter; the second stop valve can safely regulate the second intake mechanism and the third intake mechanism according to the monitoring data of the second flow meter; the third stop valve can safely regulate the second circulation reflux branch according to the monitoring data of the third pressure transmitter, thereby effectively ensuring the safety of hydrogen and various types of gases.

[0022] The explosion-proof motor in the mixing tank drives the fan blades, mixing the hydrogen and various gases. This effectively avoids stratification caused by different gas densities and the influence of gravity. Low-density gases float to the top of the mixing tank, while high-density gases sink to the bottom. This improves the quality of the gas mixture and enhances experimental accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 This is an electrical structure diagram of a multi-gas mixed hydrogen pressurized circulation device of the utility model;

[0025] Figure 2 This is a partial cross-sectional view of a stirring kettle of a multi-gas mixed hydrogen pressurized circulation device according to the present invention.

[0026] The names of the components corresponding to the reference numerals in the figure are: 1. Hydrogen intake mechanism; 11. Hydrogen gas source; 12. First stop valve; 13. First pressure gauge; 14. First pressure transmitter; 15. First pressure reducing valve; 16. First pneumatic needle valve; 17. First one-way valve; 2. Second intake mechanism; 21. Second gas source; 22. Second stop valve; 23. Second pressure gauge; 24. Second pressure transmitter; 25. Second pressure reducing valve; 26. Second pneumatic needle valve; 27. Second one-way valve; 3. Third intake mechanism; 31. Third gas source; 4. Inlet pneumatic needle valve; 5 , pressurized circulation mechanism; 51. stirring kettle; 52. pressurized air circuit cabinet; 53. compatibility test kettle; 54. first circulation reflux branch; 55. second circulation reflux branch; 61. air inlet; 62. air outlet; 63. explosion-proof motor; 64. top cover; 65. shell; 66. transmission shaft; 67. fan blade; 68. sealing ring; 69. first flow meter; 70. second flow meter; 71. outlet pneumatic needle valve; 72. high-pressure back pressure valve; 73. buffer kettle; 74. third pressure transmitter; 75. third stop valve; 76. third one-way valve; 77. third pressure gauge. DETAILED DESCRIPTION

[0027] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0029] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0030] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0031] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0032] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0033] See Figure 1 As shown in the figure, the present invention provides a multi-gas mixed hydrogen pressurized circulation device, comprising a hydrogen intake mechanism 1, a second intake mechanism 2, a third intake mechanism 3, an inlet pneumatic needle valve 4, and a pressurized circulation mechanism 5. The hydrogen intake mechanism 1, the second intake mechanism 2, and the third intake mechanism 3 are connected in parallel with the inlet pneumatic needle valve 4. The hydrogen intake mechanism 1 can be used to deliver gas to the inlet pneumatic needle valve 4, which is connected to the pressurized circulation mechanism 5. The pressurized circulation mechanism 5 is used to mix and recycle the aforementioned multiple hydrogen gases and other gases, thereby completing stress corrosion testing of metal materials in an environment with a hydrogen mixed gas.

[0034] exist Figure 1 In the optional embodiment shown in the figure, the hydrogen intake mechanism 1 includes a hydrogen gas source 11, a first stop valve 12, a first pressure gauge 13, a first pressure transmitter 14, a first pressure reducing valve 15, a first pneumatic needle valve 16 and a first one-way valve 17 connected in sequence.

[0035] It should be noted that since hydrogen is a Class IIC explosive hazardous substance, the establishment of the first stop valve 12 can manually block the air intake of the hydrogen gas source 11, which can protect the safety of personnel in an emergency. The first pressure gauge 13 and the first pressure transmitter 14 are used to monitor the gas source pressure to prevent insufficient gas supply pressure of the hydrogen gas source 11; the output pressure range of the first pressure reducing valve 15 is 10-1500psi, which can effectively avoid internal pressure overload of the stirring tank 51, ensure equipment safety, and stabilize the hydrogen pressure in the pipeline, so that the hydrogen in the pipeline is in an approximately laminar state; the first pneumatic needle valve 16 can regulate the flow of the transported hydrogen.

[0036] exist Figure 1In the optional embodiment shown in the figure, a second gas source 21 is provided in the second air intake mechanism 2, and a third gas source 31 is provided in the third air intake mechanism 3. The second gas source 21 and the third gas source 31 are respectively connected to the second stop valve 22, the second pressure gauge 23, the second pressure transmitter 24, the second pressure reducing valve 25, the second pneumatic needle valve 26 and the second one-way valve 27 in sequence, and the hydrogen intake mechanism 1, the second air intake mechanism 2 and the third air intake mechanism 3 are connected in parallel with the inlet pneumatic needle valve 4.

[0037] Among them, the second air intake mechanism 2 and the second and third air intake mechanisms 3 are used to transport different types of gases, and the second stop valve 22 can control the opening and closing of the gas; the second pressure gauge 23 and the second pressure transmitter 24 are used to monitor the gas source pressure; the second pressure reducing valve 25 is used to regulate the internal pressure; and the second pneumatic valve needle is used to regulate the gas flow.

[0038] Furthermore, a first flowmeter 69 is installed between the first pressure-reducing valve 15 and the first pneumatic needle valve 16, and a second flowmeter 70 is installed between the second pressure-reducing valve 25 and the second pneumatic needle valve 26. Both the first and second flowmeters 69 and 70 are Coriolis mass flowmeters, which can directly measure gas mass and flow in real time without being affected by fluid properties. The combination of the first and second flowmeters 69 and 70 ensures more accurate mixing of gas mixtures during multi-gas hydrogen mixing experiments.

[0039] exist Figure 1 In the optional embodiment shown in the figure, the boost circulation mechanism 5, the boost circulation mechanism 5 includes a stirring tank 51, a boost air circuit cabinet 52, and a compatibility test tank 53. The inlet pneumatic needle valve 4 is connected to the air inlet 61 of the stirring tank 51, the air outlet 62 of the stirring tank 51 is connected to the boost air circuit cabinet 52, the boost air circuit cabinet 52 is connected to the compatibility test tank 53, the compatibility test tank 53 is connected to the inlet pneumatic needle valve 4 through the first circulation reflux branch 54, and the inlet pneumatic needle valve 4 is connected to the air inlet 61 of the stirring tank 51 through the second circulation reflux branch 55.

[0040] Furthermore, the stirred tank 51 includes an explosion-proof motor 63, a top cover 64, a housing 65, a transmission shaft 66, and fan blades 67. The top cover 64 and the housing 65 are connected by bolts. The explosion-proof motor 63 is arranged on the top cover 64, the transmission shaft 66 is connected to the output end of the explosion-proof motor 63, and the fan blades 67 are connected to the transmission shaft 66. The explosion-proof motor 63 can drive the fan blades 67 to rotate, thereby mixing hydrogen and various types of gases, thereby avoiding stratification of high-density and low-density gases.

[0041] Furthermore, a sealing ring 68 is provided between the top cover 64 and the shell 65 to ensure that gas does not leak.

[0042] Furthermore, there are three fan blades 67 , and the three fan blades 67 are distributed in an array around the circumference of the transmission shaft 66 .

[0043] It should be noted that the second circulation return branch 55 is sequentially provided with an outlet pneumatic needle valve 71, a high-pressure back-pressure valve 72, a buffer kettle 73, a third pressure transmitter 74, a third stop valve 75, and a third one-way valve 76. The pressure transmitter is provided with a third pressure gauge 77. The outlet pneumatic needle valve 71 is used to regulate the amount of gas output from the second circulation branch. The third one-way valve 76 can prevent the gas output from the inlet pneumatic needle valve 4 box stirring kettle 51 from flowing into the second circulation return branch 55. The high-pressure back-pressure valve 72 is used to regulate the pressure. The third pressure transmitter 74 and the third pressure gauge 77 are used to monitor the pressure value. The third stop valve 75 is used to open / close the second circulation return branch 55.

[0044] The utility model is a multi-gas mixed hydrogen pressurized circulation device, and its specific steps are as follows:

[0045] Hydrogen and various other types of gases are delivered to the inlet pneumatic needle valve 4 through the parallel hydrogen intake mechanism 1, the second intake mechanism 2 and the third intake mechanism 3. The inlet pneumatic needle valve 4 regulates the intake flow of various gases and inputs various gases into the stirring tank 51. The stirring tank 51 delivers the stirred mixed gas to the booster gas circuit cabinet 52. The mixed gas is transmitted from the booster gas circuit cabinet 52 to the compatibility test tank 53. The environmental stress corrosion test of the metal material and hydrogen mixed gas can be completed in the compatibility test tank 53. At the same time, the mixed gas that is not consumed during the experiment can flow into the booster gas circuit cabinet 52 through the first circulation reflux branch 54 and reflux to the stirring tank 51 through the second circulation reflux branch 55, thereby avoiding waste of the mixed gas during the experiment.

[0046] By arranging the first flow meter 69, the second flow meter 70, the first pressure transmitter 14, the second pressure transmitter 24, and the third pressure transmitter 74 in the device, the inflow / outflow of various types of gases can be monitored. At the same time, the first stop valve 12 can safely regulate the hydrogen intake mechanism 1 according to the monitoring data of the first flow meter 69; the second stop valve 22 can safely regulate the second intake mechanism 2 and the third intake mechanism 3 according to the monitoring data of the second flow meter 70; the third stop valve 75 can safely regulate the second circulation reflux branch 55 according to the monitoring data of the third pressure transmitter 74, thereby effectively ensuring the safety of hydrogen and various types of gases.

[0047] The explosion-proof motor 63 in the mixing tank 51 drives the fan blades 67 to rotate, thereby mixing the hydrogen and various other gases, effectively avoiding the gas stratification caused by the influence of gravity due to different gas densities. The low-density gas floats to the top of the mixing tank, while the high-density gas sinks to the bottom. This improves the effect of the gas mixture and enhances the accuracy of the experiment.

[0048] The same or similar parts between the various embodiments in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0049] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A multi-gas mixed hydrogen pressurized circulation device, characterized in that: include: A hydrogen gas intake mechanism (1), comprising a hydrogen gas source (11), a first stop valve (12), a first pressure gauge (13), a first pressure transmitter (14), a first pressure reducing valve (15), a first pneumatic needle valve (16), and a first one-way valve (17) connected in sequence; A second air intake mechanism (2) and a third air intake mechanism (3), wherein the second air intake mechanism (2) is provided with a second air source (21), and the third air intake mechanism (3) is provided with a third air source (31), the second air source (21) and the third air source (31) are respectively connected in sequence to a second stop valve (22), a second pressure gauge (23), a second pressure transmitter (24), a second pressure reducing valve (25), a second pneumatic needle valve (26), and a second one-way valve (27), and the hydrogen air intake mechanism (1), the second air intake mechanism (2), and the third air intake mechanism (3) are connected in parallel to the inlet pneumatic needle valve (4); A pressurized circulation mechanism (5), the pressurized circulation mechanism (5) comprising a stirring kettle (51), a pressurized air circuit cabinet (52), and a compatibility test kettle (53), the inlet pneumatic needle valve (4) being connected to the air inlet (61) of the stirring kettle (51), the air outlet (62) of the stirring kettle (51) being connected to the pressurized air circuit cabinet (52), the pressurized air circuit cabinet (52) being connected to the compatibility test kettle (53), the compatibility test kettle (53) being connected to the inlet pneumatic needle valve (4) via a first circulation reflux branch (54), and the inlet pneumatic needle valve (4) being connected to the air inlet (61) of the stirring kettle (51) via a second circulation reflux branch (55).

2. The multi-gas mixed hydrogen pressurized circulation device according to claim 1, characterized in that: The stirring kettle (51) comprises an explosion-proof motor (63), a top cover (64), a shell (65), a transmission shaft (66) and a fan blade (67), wherein the top cover (64) is connected to the shell (65) by bolts, the explosion-proof motor (63) is arranged on and connected to the top cover (64), the transmission shaft (66) is connected to the output end of the explosion-proof motor (63), and the fan blade (67) is connected to the transmission shaft (66).

3. The multi-gas mixed hydrogen pressurized circulation device according to claim 2, characterized in that: A sealing ring (68) is provided between the top cover (64) and the housing (65).

4. The multi-gas mixed hydrogen pressurized circulation device according to claim 2, characterized in that: The fan blades (67) have three pieces, and the three fan blades (67) are distributed in a row around the circumference of the transmission shaft (66).

5. The multi-gas mixed hydrogen pressurized circulation device according to claim 1, characterized in that: A first flow meter (69) is provided between the first pressure reducing valve (15) and the first pneumatic needle valve (16).

6. The multi-gas mixed hydrogen pressurized circulation device according to claim 1, characterized in that: A second flow meter (70) is provided between the second pressure reducing valve (25) and the second pneumatic needle valve (26).

7. The multi-gas mixed hydrogen pressurized circulation device according to claim 1, characterized in that: The second circulation reflux branch (55) is sequentially provided with an outlet pneumatic needle valve (71), a high-pressure back-pressure valve (72), a buffer kettle (73), a third pressure transmitter (74), a third stop valve (75) and a third one-way valve (76).

8. The multi-gas mixed hydrogen pressurized circulation device according to claim 7, characterized in that: The pressure transmitter (74) is provided with a third pressure gauge (77).

Images