Gas switch and aging method thereof

Abstract

The embodiment of the invention discloses a gas switch and an aging method thereof. The gas switch comprises a switch body; the built-in hydrogen generator is arranged in the switch body and comprises hydrogen absorption and desorption powder for releasing and absorbing hydrogen; the external hydrogen generator is connected with the switch body; the external hydrogen generator comprises a three-way pipe, and the first end of the three-way pipe is communicated with the switch body; the shell is communicated with the second end of the three-way pipe and is provided with an inner cavity; a hydrogen absorption and desorption assembly used for releasing and absorbing hydrogen is arranged in an inner cavity of the shell. In the scheme, discharge of the switch body can be realized only by using the external hydrogen generator in the aging stage, and an internal hydrogen generator is not needed, that is, the frequency of releasing and absorbing hydrogen by hydrogen absorption and desorption powder in the internal hydrogen generator is not consumed in the aging stage, that is, the internal hydrogen generator does not work; therefore, when the gas switch is officially used, the service life of the gas switch can be prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of gas switches, and more specifically, to a gas switch and an aging method thereof. Background Art

[0002] In recent years, gas discharge switches have been widely used as high-voltage and high-power switch control devices in the fields of weapon detonation, self-destruction device switches, high-power pulse technology, etc. Hydrogen is a common working gas for gas switches, and its gas pressure inside the switch directly determines the switch's withstand voltage characteristics, discharge time characteristics, and discharge stability. The existing gas switch only has a hydrogen generator inside the switch body during aging and use. The number of discharges of the hydrogen generator inside the gas switch will also be consumed during the aging stage, so it will affect the life of the entire gas switch. Summary of the invention

[0003] The object of the present invention is to provide a gas switch to solve at least one of the above technical problems.

[0004] In order to achieve at least one of the above purposes, the present application adopts the following technical solutions:

[0005] A first aspect of the present application provides a gas switch, comprising: a switch body;

[0006] A built-in hydrogen generator is arranged inside the switch body, and the built-in hydrogen generator includes hydrogen absorbing and desorbing powder for releasing and absorbing hydrogen;

[0007] An external hydrogen generator connected to the switch body; the external hydrogen generator includes a three-way pipe, a first end of which is connected to the switch body; and a shell with an inner cavity connected to the second end of the three-way pipe; a hydrogen absorption and desorption component for releasing and absorbing hydrogen is arranged in the inner cavity of the shell.

[0008] Optionally, the third end of the three-way pipe is connected to the exhaust platform.

[0009] Optionally, the hydrogen absorption and desorption component comprises:

[0010] A protective shell having an inner cavity;

[0011] A first spiral heating wire located in the inner cavity of the protective shell;

[0012] Titanium hydride powder and zirconium vanadium iron powder sintered on the first hot wire; titanium hydride powder and zirconium vanadium iron powder are mixed and sintered on the first hot wire.

[0013] Optionally, the protective shell includes a plurality of first air holes.

[0014] Optionally, the external hydrogen generator further comprises: a nickel strip located in the inner cavity of the shell and connected to the hydrogen absorption and desorption assembly; and

[0015] A conductive member connected to an end of the hydrogen absorption and desorption component away from the nickel belt.

[0016] Optionally, the built-in hydrogen generator includes an outer shell with open ends, the outer shell including a plurality of second air holes; and a heat-conducting shell located inside the outer shell, a receiving cavity is formed between the heat-conducting shell and the outer shell, and the hydrogen absorbing and desorbing powder is placed in the receiving cavity.

[0017] Optionally, a second heating wire in a spiral shape is arranged in the inner cavity of the heat-conducting shell and is placed along the extension direction of the heat-conducting shell;

[0018] The heat emitted by the second heating wire is transmitted to the hydrogen absorption and desorption powder in the accommodating cavity through the heat-conducting shell;

[0019] The hydrogen absorption and desorption powder is formed by mixing titanium hydride powder and zirconium vanadium iron powder.

[0020] Optionally, the built-in hydrogen generator further comprises: a first blocking cover installed at both ends of the shell to block the openings at both ends of the shell;

[0021] A second blocking cover installed at both ends of the heat-conducting shell to block the openings at both ends of the heat-conducting shell;

[0022] One end of the second hot wire passes through the corresponding second blocking cover and the first blocking cover in sequence to the outside of the shell, and the other end passes through the corresponding second blocking cover and the first blocking cover in sequence to the outside of the shell.

[0023] A second aspect of the present application provides an aging method for a gas switch as described in the first aspect, the aging method comprising the following steps:

[0024] S1. The built-in hydrogen generator and the external hydrogen generator are powered on, and the hydrogen absorption and desorption powder in the built-in hydrogen generator and the hydrogen absorption and desorption component in the external hydrogen generator release hydrogen containing impurities and discharge it to the outside;

[0025] S2, the built-in hydrogen generator and the external hydrogen generator are powered off, and hydrogen is filled into the built-in hydrogen generator and the external hydrogen generator, so that the hydrogen absorption and desorption powder in the built-in hydrogen generator and the hydrogen absorption and desorption component in the external hydrogen generator absorb hydrogen;

[0026] S3. Aging the switch body by using the hydrogen absorption and desorption components in the external hydrogen generator.

[0027] Optionally, step S3 further comprises:

[0028] The switch body is aged by using the hydrogen absorption and desorption components in the external hydrogen generator to discharge the switch body multiple times.

[0029] The beneficial effects of this application are as follows:

[0030] 1. The gas switch provided by the present application only needs to use an external hydrogen generator to achieve the discharge of the switch body during the aging stage, and does not need to use a built-in hydrogen generator, that is, the number of times the hydrogen absorption and desorption powder in the built-in hydrogen generator releases and absorbs hydrogen will not be consumed during the aging stage, that is, the built-in hydrogen generator will not discharge; in this way, when the gas switch is officially used, the service life of the gas switch can be improved. Specifically, during the aging process, the entire gas switch, including the hydrogen absorption and desorption component and the hydrogen absorption and desorption powder, is heated, and the impurity gas is removed, and the hydrogen absorption and desorption component and the hydrogen absorption and desorption powder absorb pure hydrogen, and then the hydrogen absorption and desorption component in the external hydrogen generator is used to release and absorb hydrogen multiple times, that is, the switch body is discharged multiple times, and the aging of the switch body is completed. The external hydrogen generator is disconnected from the switch body. At this time, the gas switch can be used normally. During normal use, the hydrogen absorption and desorption powder in the built-in hydrogen generator can be used to release and absorb hydrogen, that is, multiple discharges of the switch body are achieved.

[0031] 2. The aging method of the gas switch provided by the present application, the external hydrogen generator and the internal hydrogen generator can maintain the internal gas pressure of the gas switch with hydrogen as the working medium. The external hydrogen generator can provide the hydrogen required in the aging process and absorb the impurity gas generated in the aging process to ensure the gas composition of the switch body after aging; the internal hydrogen generator can provide the hydrogen required for the switch body to work and absorb the impurity gas generated during the normal operation of the switch after the switch completes the aging and is separated from the external hydrogen generator, to ensure the internal gas composition when the gas switch is working, thereby improving the working stability and life of the gas switch. At the same time, the current value of the device can be used to determine whether the gas switch is leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The specific implementation modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] Figure 1 A schematic diagram of the overall structure of a gas switch in one embodiment of the present application is shown.

[0034] Figure 2 A schematic structural diagram of an external hydrogen generating device of a gas switch in an embodiment of the present application is shown.

[0035] Figure 3 A schematic structural diagram of an internal hydrogen generating device of a gas switch in one embodiment of the present application is shown.

[0036] Figure 4 A schematic diagram showing the structures of the first heating wire and the second heating wire in one embodiment of the present application is shown.

[0037] Figure 5 A diagram showing the relationship between gas pressure and power in a built-in hydrogen generator and an external hydrogen generator in one embodiment of the present application is shown. DETAILED DESCRIPTION

[0038] In the following description, for the purpose of explanation, in order to provide a thorough understanding of one or more embodiments, numerous specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details.

[0039] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0040] It should also be noted that, in the description of the present application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0041] In order to solve the problems existing in the prior art, an embodiment of the present application provides a gas switch, such as Figure 1-5The gas switch includes: a switch body 1; a built-in hydrogen generator 3 arranged inside the switch body 1, and the built-in hydrogen generator 3 is connected to the switch body 1 by spot welding. The gas switch also includes: an external hydrogen generator 2 connected to the switch body 1; the external hydrogen generator 2 includes a three-way pipe, the first end 41 of the three-way pipe is connected to the switch body 1, and the first end 41 of the three-way pipe is connected to the switch body 1 by argon arc welding; and a shell 21 with an inner cavity connected to the second end 42 of the three-way pipe, and the material of the shell 21 is metal; a hydrogen absorption and desorption component for releasing and absorbing hydrogen is provided in the inner cavity of the shell 21. The hydrogen absorption and desorption powder 33 and the hydrogen absorption and desorption component can realize the release of hydrogen by heating and the absorption of hydrogen by cooling. Of course, deuterium gas can also be used in practical applications.

[0042] Since the entire gas switch, including the switch body 1, the external hydrogen generator 2, the internal hydrogen generator 3, the hydrogen absorption and desorption components placed in the external hydrogen generator 2, and the hydrogen absorption and desorption powder 33 in the internal hydrogen generator 3, all contain impurities, it is necessary to remove impurities from the entire gas switch. Specifically, impurities are released by heating up, impurity gas is generated, and the impurity gas is discharged; including the discharge of impurity gas generated by heating the hydrogen absorption and desorption powder 33 and the hydrogen absorption and desorption components. After the impurity gas is discharged, hydrogen is filled into the external hydrogen generator 2 and the internal hydrogen generator 3 again and the temperature is lowered, so that the hydrogen absorption and desorption powder 33 and the hydrogen absorption and desorption components absorb hydrogen, so that when the switch body 1 is discharged and turned on, the hydrogen absorption and desorption powder 33 and the hydrogen absorption and desorption components absorb hydrogen and release the gas as pure hydrogen, and the switch is closed, that is, the power is off, and the pure hydrogen can also be absorbed, thereby realizing multiple discharges of the switch body 1. The switch body 1 is aged using the external hydrogen generator 2, i.e., during the aging process, the built-in hydrogen generator 3 does not work, and the switch body 1 is made to discharge and conduct multiple times through the external hydrogen generator 2, until the switch body 1 is completely aged, i.e., after the switch body 1 can be used normally, the external hydrogen generator 2 is disconnected from the switch body 1, i.e., the first end 41 of the three-way pipe is disconnected from the switch body 1, and only the built-in hydrogen generator 3 is retained inside the switch body 1.

[0043] In the above embodiment provided by the present application, the switch body 1 can realize the discharge of the switch body 1 by using only the external hydrogen generator 2 during the aging stage, and does not need to use the built-in hydrogen generator 3, that is, the number of times the hydrogen absorption and desorption powder 33 in the built-in hydrogen generator 3 releases and absorbs hydrogen will not be consumed during the aging stage, that is, the built-in hydrogen generator 3 will not discharge; in this way, when the gas switch is officially used, the service life of the gas switch can be improved. Specifically, during the aging process, the entire gas switch, including the hydrogen absorption and desorption component and the hydrogen absorption and desorption powder 33, is heated, and the impurity gas is removed, and after the hydrogen absorption and desorption component and the hydrogen absorption and desorption powder 33 absorb pure hydrogen, the hydrogen absorption and desorption component in the external hydrogen generator 2 is repeatedly released and absorbed, that is, the switch body 1 is repeatedly discharged, and the switch body 1 is completely aging. The external hydrogen generator 2 is disconnected from the switch body 1, and the gas switch can be used normally. When in normal use, the hydrogen absorption and desorption powder 33 in the built-in hydrogen generator 3 can be used to release and absorb hydrogen, that is, multiple discharges of the switch body 1 are realized.

[0044] By applying voltage to the gas switch, the hydrogen absorbing and desorbing powder 33 heats up and releases hydrogen, and the switch body 1 discharges and conducts. When the voltage is removed from the gas switch, the hydrogen absorbing and desorbing powder 33 cools down and absorbs excess hydrogen, thus completing one discharge and charge. When conduction is required again, this step is repeated.

[0045] In a specific embodiment, the third end 43 of the three-way pipe is connected to the exhaust platform 5. Specifically, the third end 43 of the three-way pipe is connected to the switch exhaust pipe 44, and the switch exhaust pipe 44 is connected to the exhaust platform 5. Since the built-in hydrogen generator 3 is placed in the switch body 1, when the external hydrogen generator 2 and the built-in hydrogen generator 3 are removed from the impurity gas, they can enter the exhaust platform 5 through the third end 43 of the three-way pipe. The exhaust platform 5 includes a vacuum device, and the impurity gas is extracted through the vacuum device.

[0046] In a specific embodiment, the above-mentioned hydrogen absorption and desorption assembly includes: a protective shell 22 with an inner cavity; a first spiral hot wire 23 located in the inner cavity of the protective shell 22, the first hot wire 23 being made of rhenium tungsten wire; titanium hydride powder and zirconium vanadium iron powder sintered on the first hot wire 23; titanium hydride powder and zirconium vanadium iron powder are mixed and sintered on the first hot wire 23. The chemical property of titanium hydride is that it can generate hydrogen when it is decomposed by heat, and can absorb hydrogen after cooling. That is to say, when the switch body 1 needs to discharge and conduct during the aging stage, the first hot wire 23 heats up, and the titanium hydride sintered on the surface of the first hot wire 23 decomposes by heat to generate hydrogen; when the switch body 1 is not in use, that is, when the power needs to be turned off, the first hot wire 23 cools down, and the titanium hydride sintered on the surface of the first hot wire 23 absorbs the surrounding hydrogen. Since the external hydrogen generator 2 will also produce a small amount of impurity gas during the discharge process, and the hydrogen generated by the thermal decomposition of titanium hydride will also be doped with a small amount of impurity gas, the zirconium vanadium iron powder sintered on the surface of the first hot wire 23 can be used as a getter to absorb the impurity gas; specifically, the zirconium vanadium iron powder can absorb the impurity gases such as CO, CO2, O2, N2, etc. generated during the discharge process of the switch body 1, and the adsorption of CO, CO2, O2, N2 and other gas impurities by the zirconium vanadium iron powder is mainly chemical adsorption, and the adsorption of gas molecules on the surface is weak chemical adsorption at the beginning; over time, the gas molecules will gradually decompose on the surface of the getter, and form strong chemical adsorption of oxides, carbides and nitrides with zirconium vanadium iron in atomic state. The spiral design of the first hot wire 23 can increase the length of the first hot wire 23 in the protective shell 22, and also increase the contact area between the mixture formed by the titanium hydride powder and the zirconium vanadium iron powder and the first hot wire 23, so that the titanium hydride powder is heated evenly and the hydrogen generation efficiency is improved. At the same time, the titanium hydride powder and the zirconium vanadium iron powder are sintered on the first hot wire 23, which can also effectively prevent the titanium hydride powder and the zirconium vanadium iron powder from polluting the internal discharge environment of the switch body 1.

[0047] Specifically, the protective shell 22 includes a plurality of first air holes (not shown in the figure). The hydrogen generated by the thermal decomposition of the titanium hydride powder enters the switch body 1 through the first air holes, and the hydrogen inside the switch body 1 after power failure and cooling can also enter the protective shell 22 through the first air holes. Similarly, the impurity gas generated by the switch body 1 can also enter the protective shell 22 through the first air holes to be absorbed by the zirconium vanadium iron powder.

[0048] In a specific embodiment, the hydrogen absorption and desorption assembly in the external hydrogen generator 2 is located at one end of the shell 21 away from the three-way pipe; the external hydrogen generator 2 also includes: a nickel belt 24 connected to the hydrogen absorption and desorption assembly located in the inner cavity of the shell 21; and a conductive member 25 connected to one end of the hydrogen absorption and desorption assembly away from the three-way pipe. When the external hydrogen generator 2 is working, the first hot wire 23 is connected to the anode of the external power supply through the conductive member 25, and is connected to the ground of the external power supply through the nickel belt 24, forming a loop to supply power to the first hot wire 23, so that the first hot wire 23 heats up, thereby achieving the release of hydrogen.

[0049] In practical applications, the external hydrogen generator 2 can be reused. Considering the material properties of titanium hydride and zirconium vanadium iron, the external hydrogen generator 2 can usually be reused three times, which greatly reduces the manufacturing cost of the gas switch. Specifically, the housing 21 of the external hydrogen generator 2 can be cut open with metal pliers and reconnected to the switch exhaust pipe 44 by argon arc welding.

[0050] In a specific embodiment, the built-in hydrogen generator 3 includes a shell 31 with two ends open, and a heat-conducting shell 32 located inside the shell 31. A receiving cavity is formed between the heat-conducting shell 32 and the shell 31, and a hydrogen absorption and desorption powder 33 for releasing and absorbing hydrogen is placed in the receiving cavity. The shell 31 protects the built-in hydrogen generator 3. Placing the hydrogen absorption and desorption powder 33 in the receiving cavity formed between the heat-conducting shell 32 and the shell 31 can prevent the switch body 1 from affecting the hydrogen absorption and desorption powder 33 during the discharge process. After removing the external hydrogen generator 2, the performance of the switch body 1 can be improved, and the service life of the switch body 1 and the built-in hydrogen generator 3 can be further improved.

[0051] In a specific embodiment, a second hot wire 34 in a spiral shape is arranged in the inner cavity of the heat-conducting shell 32 in the built-in hydrogen generator 3; the heat emitted by the second hot wire 34 is transmitted to the hydrogen absorption and desorption powder 33 in the accommodating cavity through the heat-conducting shell 32. The hydrogen absorption and desorption powder 33 is formed by mixing titanium hydride powder and zirconium vanadium iron powder. The length of the spiral part of the second hot wire 34 extends from one end to the other end of the heat-conducting shell 32, so that the hydrogen absorption and desorption powder 33 formed by titanium hydride powder and zirconium vanadium iron powder in the accommodating cavity can be evenly heated. The spiral design of the second hot wire 34 can increase the length of the second hot wire 34 in the heat-conducting shell 32, that is, increase the heating area of ​​the second hot wire 34, and can increase the temperature of the heat-conducting shell 32 more quickly, so that the hydrogen absorption and desorption powder 33 formed by mixing titanium hydride powder and zirconium vanadium iron powder in the accommodating cavity is heated, so as to decompose hydrogen more quickly, and then the switch body 1 can be discharged and turned on smoothly during use. Here, when the second hot wire 34 is heated, the fine metal particles dropped from the second hot wire 34 may splash, so the design of separating the second hot wire 34 from the hydrogen absorption and desorption powder 33 can prevent the fine metal particles dropped from the second hot wire 34 from splashing into the hydrogen absorption and desorption powder 33, and will not affect the performance of the built-in hydrogen generator 3.

[0052] In a specific example, the housing 31 includes a plurality of second air holes 311; hydrogen generated by the thermal decomposition of the titanium hydride powder enters the switch body 1 through the second air holes 311, and hydrogen inside the switch body 1 after power failure and cooling can also enter the accommodating cavity through the second air holes 311. Similarly, impurity gases generated by the switch body 1 can also enter the accommodating cavity through the second air holes 311 to be absorbed by the zirconium vanadium iron powder.

[0053] In a specific example, the first heating wire 23 and the second heating wire 34 are respectively made of rhenium tungsten wire. Rhenium tungsten wire has the advantages of high melting point, high resistivity, good strength, low vapor pressure, etc. Compared with the traditional tungsten wire, the first heating wire 23 and the second heating wire 34 use rhenium tungsten wire to solve the problem that the tungsten wire becomes brittle after recrystallization after high temperature use and is easily broken under impact or vibration, thereby ensuring the mechanical reliability of the external hydrogen generator 2 and the internal hydrogen generator 3.

[0054] In a specific embodiment, the built-in hydrogen generator 3 further includes: a first blocking cover 35 installed at both ends of the outer shell 31 to block the openings at both ends of the outer shell 31; and a second blocking cover 36 installed at both ends of the heat-conducting shell 32 to block the openings at both ends of the heat-conducting shell 32. The second blocking cover 36 can close both ends of the heat-conducting shell 32, and the first blocking cover 35 can close both ends of the accommodating cavity. Further, the two ends of the second hot wire 34 extend horizontally outward to form a first extension section 341 and a second extension section 342 respectively; the first extension section 341 passes through the corresponding second blocking cover 36 and the first blocking cover 35 to the outside of the outer shell 31 in sequence, and is connected to the power supply ground; the second extension section 342 passes through the corresponding second blocking cover 36 and the first blocking cover 35 in sequence to the outside of the outer shell 31, and is connected to the power supply anode. The design of the first extension section 341 and the second extension section 342 can realize the second hot wire 34 to be connected to electricity, form a loop to supply power to the second hot wire 34, realize the heating of the second hot wire 34, and thus realize the release of hydrogen. The design of the first blocking cover 35 and the second blocking cover 36 can also fix the first extension section 341 and the second extension section 342 of the second hot wire 34, that is, the second hot wire 34 is fixed in the inner cavity of the heat-conducting shell 32 and will not move.

[0055] Furthermore, to ensure insulation and heat insulation between electrodes, the outer walls of the first extension section 341 and the second extension section 342 are wrapped with porcelain sleeves 343, which separate the first extension section 341 and the second extension section 342 from the outer metal shell respectively, thereby achieving effective insulation and heat insulation.

[0056] Another embodiment of the present application further provides an aging method for the above-mentioned gas switch, the aging method comprising the following steps:

[0057] S1, the built-in hydrogen generator 3 and the external hydrogen generator 2 are powered on, the hydrogen absorption and desorption powder 33 in the built-in hydrogen generator 3 and the hydrogen absorption and desorption component in the external hydrogen generator 2 release the hydrogen containing impurities and discharge it to the outside; in actual application, since the entire gas switch, including the switch body 1, the hydrogen absorption and desorption component in the external hydrogen generator and the hydrogen absorption and desorption powder 33 in the built-in hydrogen generator 3, all contain impurities, the entire gas switch needs to be decontaminated; specifically, the entire gas switch is in a vacuum environment and heated to generate impurity gas; at the same time, the built-in hydrogen generator 3 and the external hydrogen generator 2 are powered on, in order to make the gas switch release more impurities and discharge the impurity gas more thoroughly, it is necessary to heat up in a vacuum environment and discharge the impurity gas, specifically through the exhaust station 5. The entire gas switch is in a vacuum degree P 外In an environment of ≤20Pa, the temperature is raised to T=500℃±5℃ and then kept for 1 hour, and the temperature is raised at a rate of (80~120)℃ / 20 minutes. Here, the exhaust station 5 discharges the impurity gas generated by the gas switch when heated, the hydrogen absorbing and desorbing powder 33 and the hydrogen containing impurities released by the hydrogen absorbing and desorbing assembly when heated to the outside through the exhaust device.

[0058] Furthermore, the hydrogen absorption and desorption powder 33 in the built-in hydrogen generator 3 is formed by mixing titanium hydride powder and zirconium vanadium iron powder, and the titanium hydride powder and zirconium vanadium iron powder in the hydrogen absorption and desorption component in the external hydrogen generator 2 are mixed and sintered on the surface of the first hot wire 23. The surface of the titanium hydride powder exposed to the atmosphere will be covered with a layer of impurities, and the surface of the zirconium vanadium iron powder exposed to the atmosphere will also be covered with a layer of H2O, CO2 and hydrocarbons. Therefore, after the built-in hydrogen generator 3, the external hydrogen generator 2 and the switch body 1 are connected to form a whole, the titanium hydride powder and the zirconium vanadium iron powder need to be removed to remove the surface passivation film and adsorbed gas, so as to obtain a clean active surface.

[0059] Before step S1, the internal hydrogen generator 3 is placed in the switch body 1, the switch body 1 is connected to the first end 41 of the three-way pipe, the external hydrogen generator 2 is connected to the second end 42 of the three-way pipe; the third end 43 of the three-way pipe is connected to the exhaust platform 5. In this way, the internal hydrogen generator 3, the external hydrogen generator 2, the switch body 1 and the exhaust platform 5 are connected to form a whole.

[0060] S2, the built-in hydrogen generator 3 and the external hydrogen generator 2 are powered off, and hydrogen is filled into the built-in hydrogen generator 3 and the external hydrogen generator 2, so that the hydrogen absorption and desorption powder 33 in the built-in hydrogen generator 3 and the hydrogen absorption and desorption component in the external hydrogen generator 2 absorb hydrogen; after the impurity gas is discharged, the entire gas switch is powered off and cooled, and hydrogen is filled into the built-in hydrogen generator 3 and the external hydrogen generator 2, and the hydrogen absorption and desorption powder 33 and the hydrogen absorption and desorption component absorb hydrogen at this time; in this way, when the built-in hydrogen generator 3 or the external hydrogen generator 2 is cooled again, the hydrogen absorption and desorption powder 33 or the hydrogen absorption and desorption component can release hydrogen with higher purity, so that the switch body 1 can discharge and conduct.

[0061] S3, aging the switch body 1 by using the hydrogen absorption and desorption components in the external hydrogen generator 2.

[0062] The step S3 further includes: using the hydrogen absorption and desorption components in the external hydrogen generator 2 to discharge the switch body 1 multiple times to age the switch body 1. During the ageing stage, the switch body 1 only needs to use the external hydrogen generator 2 to achieve the discharge of the switch body 1, and does not need to use the built-in hydrogen generator 3. In this way, the number of times the hydrogen absorption and desorption powder 33 in the built-in hydrogen generator 3 releases and absorbs hydrogen will not be consumed during the ageing stage, that is, the built-in hydrogen generator 3 will not discharge; when the gas switch is officially used, the service life of the gas switch can be increased.

[0063] After aging is completed, the external hydrogen generator 2 is disconnected from the switch body 1. At this time, the gas switch can be used normally. During normal use, the hydrogen absorbing and desorbing powder 33 in the built-in hydrogen generator 3 can be used to release and absorb hydrogen, that is, multiple discharges of the switch body 1 can be achieved.

[0064] The specific process of the aging method for the gas switch provided in this application is as follows:

[0065] The first end 41 of the three-way pipe in the external hydrogen generator 2 is connected to the switch body 1, and the third end 43 is connected to the exhaust platform 5; since the built-in hydrogen generator 3 is located inside the switch body 1, the first end 41 of the three-way pipe is connected to the third end 43, so the built-in hydrogen generator 3 can be connected to the exhaust platform 5 through the first end 41 and the third end 43 of the three-way pipe, so as to remove impurities from the built-in hydrogen generator 3. The nickel strip 24 at one end of the first hot wire 23 in the external hydrogen generator 2 is connected to the ground electrode of the power supply, and the conductive member 25 at the other end is connected to the anode of the power supply. The first extension section 341 at both ends of the second hot wire 34 is connected to the ground electrode of the power supply, and the second extension section 342 is connected to the anode of the power supply; then the entire gas switch is covered with an oven, and the oven is not working at this time. Start to evacuate the entire gas switch through the exhaust platform 5. When the vacuum degree is less than 8×10 -4 Pa, the voltage of the external hydrogen generator 2 and the voltage of the internal hydrogen generator 3 are U H The current of the first hot wire 23 and the second hot wire 34 should be between 1.0 and 1.2 A. If the current is too large, there may be a switch leakage. When the current is kept in the normal range, the oven is heated up. After the temperature T rises to 500℃±5℃ and is kept warm for 1 hour, the oven vacuum degree P 外 ≤20Pa. The oven should be heated at a rate of (80-120)℃ / 20 minutes; in this way, the temperature of the entire gas switch rises under the action of the oven, so that impurities on the surface of the gas switch can be removed. Of course, during the oven insulation process, the exhaust device on the exhaust table 5 is always in working state, which is convenient for extracting gas impurities generated by the gas switch to the outside. The following table 1 is a table showing the relationship between the voltage and vacuum degree in the built-in hydrogen generator 3 and the external hydrogen generator 2.

[0066] Table 1

[0067]

[0068] During the heating and heat preservation process of the oven, the mixture of titanium hydride powder and zirconium vanadium iron powder sintered on the first hot wire 23 in the external hydrogen generator 2, and the hydrogen absorption and desorption powder 33 formed by the combination of titanium hydride powder and zirconium vanadium iron powder contained in the accommodating cavity in the built-in hydrogen generator 3 also need to be removed from the impurities; specifically, during the heating and heat preservation process of the oven, the first hot wire 23 and the second hot wire 34 are both energized to generate heat. Since the titanium hydride powder decomposes hydrogen when heated, the temperature of the titanium hydride powder and the zirconium vanadium iron powder can be increased when the first hot wire 23 and the second hot wire 34 are energized to generate heat, so that the titanium hydride powder releases hydrogen doped with impurities, and the zirconium vanadium iron powder releases impurity gas, and the generated gas is discharged through the exhaust device on the exhaust platform 5.

[0069] In the actual gas extraction process, the voltage U of the external hydrogen generator 2 and the voltage U of the internal hydrogen generator 3 H =6.5V, oven temperature T = 500℃±5℃, the vacuum degree of the entire gas switch P 内 Should be less than 2×10 -4 Pa, if the requirements are not met, the time needs to be extended until the requirements are met, so as to ensure that the hydrogen with impurities released by the entire gas switch, the mixture of titanium hydride powder and zirconium vanadium iron powder sintered on the first hot wire 23, and the hydrogen absorbing and releasing powder 33 composed of titanium hydride powder and zirconium vanadium iron powder contained in the accommodating cavity in the built-in hydrogen generator 3, as well as the generated impurity gas are completely released, thereby ensuring the purity of the gas composition inside the entire gas switch.

[0070] The exhaust station 5 also includes a gas storage bottle. After the gas is exhausted, the U H Drop to 0, cool down, open the gas cylinder valve, the built-in hydrogen generator 3 and the external hydrogen generator 2 start to absorb hydrogen, and it ends when the pressure in the entire gas switch drops to 0.1kPa, close the gas cylinder valve, and the built-in hydrogen generator 3 and the external hydrogen generator finish absorbing hydrogen.

[0071] Table 2 below is a table showing the relationship between the gas pressure and power in the built-in hydrogen generator 3 and the external hydrogen generator 2. Figure 5 It can be seen that the built-in hydrogen generator 3 and the external hydrogen generator 2 are positively correlated with the power. As the heating power increases, the gas pressure released by the built-in hydrogen generator 3 and the external hydrogen generator 2 becomes greater; and as the heating power increases, the gas pressure released per unit power of the hydrogen generator becomes greater.

[0072] Table 2

[0073] power Air pressure power Air pressure 0.12 0 9.7 46.8 0.46 0.1 11.5 67.8 0.94 0.1 13.58 90 0.1.6 0.1 15.4 124.6 2.35 0.2 17.32 164.3 3.24 0.7 19.76 219 4.3 7.5 22.18 277 5.48 13.3 24.75 358.8 6.79 21.1 27.55 446.8 8.2 32.1

[0074] Here, before the gas cylinder valve is opened, that is, before the internal hydrogen generator 3 and the external hydrogen generator start to absorb hydrogen, it is necessary to fill the gas cylinder with hydrogen first, and at this time, the voltage U of the external hydrogen generator 2 and the internal hydrogen generator 3 is kept constant. H =6.5V, the pressure in the gas cylinder is 3.5±0.1kPa, after the filling of hydrogen in the gas cylinder is completed, close the main valve of the gas switch so that U H Down to 0.

[0075] After the internal hydrogen generator 3 and the external hydrogen generator finish absorbing hydrogen, the external hydrogen generator 2 discharges the switch body 1 multiple times to age the switch body 1. During the ageing stage, the switch body 1 only needs to use the external hydrogen generator 2 to achieve the discharge of the switch body 1, and does not need to use the internal hydrogen generator 3. In this way, the number of times the hydrogen absorbing and desorbing powder 33 in the internal hydrogen generator 3 releases and absorbs hydrogen will not be consumed during the ageing stage, that is, the internal hydrogen generator 3 will not discharge; after the ageing is completed, the external hydrogen generator 2 is disconnected from the switch body 1, and the gas switch can be used normally. During normal use, the hydrogen absorbing and desorbing powder 33 in the internal hydrogen generator 3 can be used to release and absorb hydrogen, that is, multiple discharges of the switch body 1 are achieved.

[0076] In the aging method of the gas switch provided in the present application, the external hydrogen generator 2 and the internal hydrogen generator 3 can maintain the internal gas pressure of the gas switch with hydrogen as the working medium. The external hydrogen generator 2 can provide the hydrogen required in the aging process and absorb the impurity gas generated in the aging process to ensure the gas composition of the switch body 1 after aging; the internal hydrogen generator 3 can provide the hydrogen required for the switch body to work and absorb the impurity gas generated in the normal working process of the switch after the switch completes the aging and is separated from the external hydrogen generator 2 to ensure the internal gas composition when the gas switch is working, thereby improving the working stability and life of the gas switch. At the same time, the current value of the device can be used to determine whether the gas switch is leaking.

[0077] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A gas switch, characterized in that: include: Switch body; A built-in hydrogen generator is arranged inside the switch body, and the built-in hydrogen generator includes hydrogen absorbing and desorbing powder for releasing and absorbing hydrogen; An external hydrogen generator connected to the switch body; the external hydrogen generator includes a three-way pipe, a first end of which is connected to the switch body; and a shell with an inner cavity connected to the second end of the three-way pipe; a hydrogen absorption and desorption component for releasing and absorbing hydrogen is arranged in the inner cavity of the shell.

2. The gas switch according to claim 1, characterized in that: The third end of the three-way pipe is communicated with the exhaust platform.

3. The gas switch according to claim 1, characterized in that: The hydrogen absorption and desorption component comprises: A protective shell having an inner cavity; A first spiral heating wire located in the inner cavity of the protective shell; Titanium hydride powder and zirconium vanadium iron powder sintered on the first hot wire; titanium hydride powder and zirconium vanadium iron powder are mixed and sintered on the first hot wire.

4. The gas switch according to claim 3, characterized in that: The protective shell includes a plurality of first air holes.

5. The gas switch according to claim 1, characterized in that: The external hydrogen generator further comprises: a nickel strip located in the inner cavity of the shell and connected to the hydrogen absorption and desorption assembly; and A conductive member connected to an end of the hydrogen absorption and desorption component away from the nickel belt.

6. The gas switch according to claim 1, characterized in that: The built-in hydrogen generator comprises an outer shell with two open ends, the outer shell comprises a plurality of second air holes; and a heat-conducting shell located inside the outer shell, a receiving cavity is formed between the heat-conducting shell and the outer shell, and the hydrogen absorption and desorption powder is placed in the receiving cavity.

7. The gas switch according to claim 6, characterized in that: A second heating wire in a spiral shape is arranged in the inner cavity of the heat-conducting shell and is placed along the extension direction of the heat-conducting shell; The heat emitted by the second heating wire is transmitted to the hydrogen absorption and desorption powder in the accommodating cavity through the heat-conducting shell; The hydrogen absorption and desorption powder is formed by mixing titanium hydride powder and zirconium vanadium iron powder.

8. The gas switch according to claim 7, characterized in that: The built-in hydrogen generator further includes: a first blocking cover installed at both ends of the shell to block the openings at both ends of the shell; A second blocking cover installed at both ends of the heat-conducting shell to block the openings at both ends of the heat-conducting shell; One end of the second hot wire passes through the corresponding second blocking cover and the first blocking cover in sequence to the outside of the shell, and the other end passes through the corresponding second blocking cover and the first blocking cover in sequence to the outside of the shell.

9. A method for aging a gas switch according to any one of claims 1 to 8, characterized in that: The aging method comprises the following steps: S1. The built-in hydrogen generator and the external hydrogen generator are powered on, and the hydrogen absorption and desorption powder in the built-in hydrogen generator and the hydrogen absorption and desorption component in the external hydrogen generator release hydrogen containing impurities and discharge it to the outside; S2, the built-in hydrogen generator and the external hydrogen generator are powered off, and hydrogen is filled into the built-in hydrogen generator and the external hydrogen generator, so that the hydrogen absorption and desorption powder in the built-in hydrogen generator and the hydrogen absorption and desorption component in the external hydrogen generator absorb hydrogen; S3. Aging the switch body by using the hydrogen absorption and desorption components in the external hydrogen generator.

10. The aging method according to claim 9, characterized in that: The step S3 further comprises: The switch body is aged by using the hydrogen absorption and desorption components in the external hydrogen generator to discharge the switch body multiple times.

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