Device and method for filling high-density liquid alloy by isolating oxygen

Abstract

The invention provides a device and method for filling high-density liquid alloy in an oxygen isolation mode, and belongs to the technical field of easy-to-oxidize liquid metal filling, the device comprises a nitrogen cylinder, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a non-transparent tank body, a sucking pump, an injector, a container and a plurality of pipelines, the first switch is connected with the nitrogen cylinder, and the second switch is connected with the non-transparent tank body; the second switch is connected with the sucking pump, the third switch is connected with the injector, the fourth switch is located above the non-transparent tank body, the non-transparent tank body is located above the container, and the fifth switch is located below the non-transparent tank body; the liquid alloy is liquid mercury sodium alloy, mercury tin alloy or mercury indium alloy; the invention further provides an experimental method of the device, compared with filling of high-density liquid alloy in an oxygen-free environment, the experimental method does not need a huge oxygen-free space and deoxygenization equipment, an operator does not need special protection, operation can be conducted in the natural environment, and energy consumption is low.

Description

Technical Field

[0001] The present invention relates to the technical field of filling of easily oxidized liquid metals, and particularly relates to a device and method for filling high-density liquid alloys while isolating oxygen. Background Art

[0002] High-density liquid alloys are prone to reacting with oxygen to form oxide films. Pure high-density liquid alloys refer to non-oxidized liquid high-density liquid alloys. In engineering, pure high-density liquid alloys are often required. Therefore, it is necessary to prevent high-density liquid alloys from being oxidized during storage and use; high-density liquid alloys are in a flowable liquid state at room temperature, and they have a relatively large density, usually about 11000 - 14000 kg / m 3 or so. High-density liquid alloys do not react with nitrogen, do not react with water, and do not react with dilute hydrochloric acid solutions; however, currently, filling high-density liquid alloys in an oxygen-free environment requires a large oxygen-free space and deoxidization equipment. If pure high-density liquid alloys that have not been oxidized are injected into non-transparent tanks, it is difficult to observe the liquid level changes during liquid filling in non-transparent tanks.

[0003] Therefore, based on the physical properties of high-density liquid alloys, the present invention proposes a device and method for filling high-density liquid alloys into non-transparent tanks. Summary of the Invention

[0004] In order to solve the deficiencies existing in the prior art, the device and method for filling high-density liquid alloys while isolating oxygen provided by the present invention can isolate oxygen and prevent high-density liquid alloys from being oxidized; it can reserve an appropriate space in the cavity of the non-transparent tank for gas pressurization while filling high-density liquid alloys.

[0005] According to the content of the present invention, the present invention provides a device for filling high-density liquid alloys while isolating oxygen, including a nitrogen cylinder, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a non-transparent tank, a vacuum pump, a syringe, a container, and several pipelines; One end of the first switch is connected to the second switch, the third switch, and the fourth switch through pipelines; The other end of the first switch is connected to the nitrogen cylinder. The nitrogen cylinder is used to provide the nitrogen required by the device. The second switch is connected to the vacuum pump. The vacuum pump is used to pump high-density liquid alloys into the non-transparent tank. The third switch is connected to the syringe. The syringe is used to inject a fixed volume of nitrogen into the non-transparent tank. The fourth switch is located above the non-transparent tank and is used to control the on-off of the non-transparent tank. The non-transparent tank is located above the container. The fifth switch is located below the non-transparent tank and is used to control the on-off between the non-transparent tank and the container.

[0006] Further, the device further includes a pressure gauge located above the non-transparent tank for detecting the pressure inside the non-transparent tank.

[0007] Further, the nitrogen cylinder, the first switch, the air pump, the second switch, the syringe, and the third switch are all connected to the fourth switch through pipelines. The non-transparent tank is connected to the container through a pipeline, and the connecting pipeline extends into the liquid in the container.

[0008] Further, the first switch, the second switch, the third switch, the fourth switch, and the fifth switch are all gas switching valves.

[0009] Further, the liquid alloy is liquid sodium-potassium alloy, mercury-sodium alloy, mercury-tin alloy, or mercury-indium alloy.

[0010] The present invention also provides an experimental method for filling high-density liquid alloy while isolating oxygen, and the experimental method includes: S0: After connecting the device through pipelines, all switches are opened except the first switch which is closed. S1: Pour dilute hydrochloric acid solution into the container, then pour in the high-density liquid alloy and shake it. S2: Open the first switch and the air pump to remove oxygen from all pipelines and inside the non-transparent tank. S3: The syringe removes oxygen and inhales nitrogen. Close the second switch, the air pump, and the third switch, and then place the pipeline at the tail of the fifth switch below the liquid level of the high-density liquid alloy. S4: Fill the device with nitrogen until the non-transparent tank, the pipelines, and the syringe are all filled with nitrogen, then close the first switch. S5: Open the second switch and the air pump to suck the high-density liquid alloy into the non-transparent tank through the pipeline. When the high-density liquid alloy reaches the fourth switch, close the air pump and the second switch. S6: Open the third switch and push nitrogen into the non-transparent tank with the syringe to leave a space in the upper cavity inside the non-transparent tank for storing nitrogen. S7: Close the third switch and the fifth switch, open the first switch, and fill the non-transparent tank with nitrogen and pressurize it. After the pressurization is completed, close the first switch and the fourth switch. S8: Remove the gas filling and liquid pumping equipment, keep the fourth switch and the fifth switch, and obtain the non-transparent tank filled with high-density liquid alloy.

[0011] Further, after pouring in the high-density liquid alloy in S1, the high-density liquid alloy and the dilute hydrochloric acid solution are layered, and the high-density liquid alloy is at the bottom of the container. The shaking process is used to remove the oxide film on the surface of the high-density liquid alloy.

[0012] Furthermore, during the process of removing oxygen from all pipelines and non-transparent tank bodies in S2, first take out the pipelines connected to the container from the liquid level of the container, then open the first switch and the air pump, and fill nitrogen into the cavity of the non-transparent tank body. The nitrogen is filled into the non-transparent tank body from above and discharged from below.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The device and method provided by the present invention occupy less space, are simple to operate and energy-saving. Compared with filling high-density liquid alloy in an oxygen-free environment, the present invention does not require a large oxygen-free space and deoxygenation equipment. The operator does not need special protection and can operate in a natural environment, and the energy consumption is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below. It should be understood that the following described drawings only relate to some embodiments of the present disclosure and do not limit the present disclosure, where: Figure 1 is a schematic structural diagram of the device for filling high-density liquid alloy while isolating oxygen provided by the present invention.

[0015] Figure 2 is a schematic diagram of the switch in step 2 of the method for filling high-density liquid alloy while isolating oxygen provided by the present invention.

[0016] Figure 3 is a schematic diagram of the switch in step 3 of the method for filling high-density liquid alloy while isolating oxygen provided by the present invention.

[0017] Figure 4 is a schematic diagram of the switch in step 4 of the method for filling high-density liquid alloy while isolating oxygen provided by the present invention.

[0018] Figure 5 is a schematic diagram of the switch in step 5 of the method for filling high-density liquid alloy while isolating oxygen provided by the present invention; wherein, (a) is a schematic diagram of the switch for pumping alloy into the non-transparent tank body in step 5, and (b) is a schematic diagram of the switch when the alloy reaches the fourth switch in step 5.

[0019] Figure 6 is a schematic diagram of the switch in step 6 of the method for filling high-density liquid alloy while isolating oxygen provided by the present invention.

[0020] Figure 7 is a schematic diagram of the switch in step 7 of the method for filling high-density liquid alloy while isolating oxygen provided by the present invention; wherein, (a) is a schematic diagram of the switch for filling nitrogen into the non-transparent tank body for pressurization in step 7, and (b) is a schematic diagram of the switch after the pressurization ends in step 7.

[0021] Figure 8It is the schematic diagram of the switch in step 8 of the method for isolating oxygen and filling high-density liquid alloy provided by the present invention.

[0022] 1 - Nitrogen cylinder, 2 - First switch, 3 - Second switch, 4 - Third switch, 5 - Fourth switch, 6 - Fifth switch, 7 - Non-transparent tank, 8 - Air pump, 9 - Syringe, 10 - Container, 11 - Pressure gauge, 12 - Pipeline. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0025] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "axis", "longitudinal", "transverse", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0027] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0028] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "set", "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] The present invention provides a device for filling high-density liquid alloy while isolating oxygen, including a nitrogen cylinder 1, a first switch 2, a second switch 3, a third switch 4, a fourth switch 5, a fifth switch 6, a non-transparent tank 7, an air pump 8, a syringe 9, a container 10, a pressure gauge 11, and a plurality of pipes 12; the first switch 2, the second switch 3, the third switch 4, the fourth switch 5, and the fifth switch are all gas switch valves for controlling the on-off of the pipeline connection; One end of the first switch 2 is connected to the second switch 3, the third switch 4, and the fourth switch 5 through a pipe; the other end of the first switch 2 is connected to the nitrogen cylinder 1, and the nitrogen cylinder 1 is used to provide the nitrogen required by the device. The second switch 3 is connected to the air pump 8, and the air pump 8 is used to pump the high-density liquid alloy into the non-transparent tank 7. The third switch 4 is connected to the syringe 9, and the syringe 9 is used to inject a fixed volume of nitrogen into the non-transparent tank 7. The fourth switch 5 is located above the non-transparent tank 7 and is used to control the on-off of the non-transparent tank 7. The non-transparent tank 7 is located above the container 10. The fifth switch 6 is located below the non-transparent tank 7 and is used to control the on-off of the non-transparent tank 7 and the container 10; the pressure gauge 11 is located above the non-transparent tank 7 and is used to detect the pressure inside the non-transparent tank 7; the nitrogen cylinder 1 and the first switch 2, the air pump 8 and the second switch 3, and the syringe 9 and the third switch 4 are all connected to the fourth switch 5 through the pipe 12. The non-transparent tank 7 and the container 10 are connected through the pipe 12, and the connecting pipe leads into the liquid in the container 10.

[0030] In some embodiments of the present invention, the liquid alloy is one of liquid sodium-potassium alloy, mercury-sodium alloy, mercury-tin alloy, or mercury-indium alloy.

[0031] The following is described with specific embodiments.

[0032] Embodiment 1 A method for filling high-density liquid alloy while isolating oxygen, the method includes, S0. Connect the equipment; before injecting the liquid, connect each equipment as shown in Figure 1 , check the tightness of the interface and the correct position of the switch. Except for the first switch 2 of the nitrogen cylinder being closed, the rest of the switches are all open; S1. Prepare pure mercury-indium alloy; pour dilute hydrochloric acid solution into container 10 until the liquid level is about 2 cm high, and then pour the mercury-indium alloy into container 10. Since the density of the mercury-indium alloy is greater than that of the dilute hydrochloric acid solution, the phenomenon after pouring the mercury-indium alloy should be that the mercury-indium alloy and the dilute hydrochloric acid solution are layered, with the mercury-indium alloy at the bottom of the container. The mercury-indium at the bottom of the container is isolated from oxygen by the dilute hydrochloric acid solution, preventing the mercury-indium alloy from undergoing an oxidation reaction with oxygen; the dilute hydrochloric acid solution can remove the oxide film on the surface of the mercury-indium alloy. Therefore, after pouring in the mercury-indium alloy, gently shake container 10 to separate the oxide film from the mercury-indium alloy. S2. Remove oxygen from the pipeline and non-transparent tank body 7; take out the pipeline port at the 6th end of the fifth switch from the liquid level of container 10, slowly open the nitrogen cylinder 1 and the first switch 2, and turn on the air pump 8. At this time, nitrogen will be filled into the cavity of the non-transparent tank body 7 and discharged through the pipeline outlet of the air pump 8 and the fifth switch 6. Since the density of nitrogen is greater than that of oxygen, nitrogen is filled from above the non-transparent tank body 7 and discharged from below, so that all the oxygen inside the non-transparent tank body 7 can be squeezed out. S3. The syringe 9 removes oxygen and inhales nitrogen; after exhausting for one minute, repeatedly push and pull the syringe 9 to discharge the oxygen inside the syringe 9 and inhale nitrogen, repeating 5 times. Finally, inhale 100 ml of nitrogen, close the second switch 3, turn off the air pump 8, close the third switch 4, and then place the pipeline at the tail of the fifth switch below the liquid level of the mercury-indium alloy. S4. The oxygen removal is completed; 30 seconds after nitrogen inflation, at this time, the non-transparent tank body 7, the pipeline 12, and the syringe 9 are all filled with nitrogen and there is no oxygen. Close the first switch 2 to stop filling nitrogen. S5. Pump the mercury-indium alloy into the non-transparent tank body 7; open the second switch 3 and turn on the air pump 8. The negative pressure generated by the air pump 8 will suck the mercury-indium alloy into the non-transparent tank body 7 through the bottom pipeline. Since the liquid level position of the non-transparent tank body 7 cannot be observed in real time, it is necessary to observe whether there is mercury-indium alloy in the pipeline connected to the fourth switch 5 during liquid pumping. When the mercury-indium alloy reaches the fourth switch 5, turn off the air pump 8 and close the second switch 3. S6. Leave a nitrogen space that can be pressurized in the upper cavity inside the non-transparent tank body 7; open the third switch 4 and push 50 ml of gas into the force with the syringe 9. At this time, the mercury-indium alloy in the pipeline connected to the fourth switch 5 starts to flow back into the non-transparent tank body 7, and a space is left in the upper cavity inside the non-transparent tank body 7 to store nitrogen for nitrogen pressurization. S7. Fill the non-transparent tank body 7 with nitrogen for pressurization; close the third switch 4, close the fifth switch 6, open the first switch 2, observe the reading of the pressure gauge 11, fill the non-transparent tank body 7 with nitrogen and pressurize it to a pressure of 0.2 - 1 MPa. After the pressurization is completed, close the first switch 2 and close the fourth switch 5. S8. Remove the gas filling and liquid pumping equipment, keep the fourth switch 5 and the fifth switch 6, and obtain the non-transparent tank body 7 filled with high-density liquid alloy.

[0033] After the liquid filling is completed, let it stand for 24 h, check the change of the pressure gauge, and check for liquid leakage.

[0034] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An oxygen-isolating high-density liquid alloy filling device, characterized in that: It includes a nitrogen cylinder, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a non-transparent tank, a vacuum pump, a syringe, a container and a number of pipes; One end of the first switch is connected to the second switch, the third switch, and the fourth switch through a pipeline; The other end of the first switch is connected to the nitrogen bottle, which is used to provide the nitrogen required by the device. The second switch is connected to the vacuum pump, which is used to draw high-density liquid alloy into the non-transparent tank body. The third switch is connected to the syringe, which is used to inject a fixed volume of nitrogen into the non-transparent tank body. The fourth switch is located above the non-transparent tank body and is used to control the on and off of the non-transparent tank body. The non-transparent tank body is located above the container. The fifth switch is located below the non-transparent tank body and is used to control the on and off between the non-transparent tank body and the container.

2. The oxygen-isolating high-density liquid alloy filling device according to claim 1 is characterized in that: The device also includes a pressure gauge, which is located above the non-transparent tank body and is used to detect the pressure in the non-transparent tank body.

3. The oxygen-isolating high-density liquid alloy filling device according to claim 1 is characterized in that: The nitrogen bottle and the first switch, the vacuum pump and the second switch, and the syringe and the third switch are all connected to the fourth switch through a pipeline, the non-transparent tank and the container are connected through a pipeline, and the connecting pipeline is connected to the liquid in the container.

4. The oxygen-isolating high-density liquid alloy filling device according to claim 1 is characterized in that: The first switch, the second switch, the third switch, the fourth switch and the fifth switch are all gas switch valves.

5. The oxygen-isolating high-density liquid alloy filling device according to claim 1 is characterized in that: The liquid alloy is a liquid mercury-sodium alloy, a liquid mercury-tin alloy or a liquid mercury-indium alloy.

6. The experimental method of an oxygen-isolated high-density liquid alloy filling device according to any one of claims 1 to 5, characterized in that: The experimental method includes: S0. After the devices are connected through the pipeline, all switches are turned on except the first switch; S1. Pour dilute hydrochloric acid solution into the container, then pour in high-density liquid alloy and shake; S2, turn on the first switch, turn on the vacuum pump, and remove oxygen from all pipes and non-transparent tanks; S3, the syringe exhausts oxygen and inhales nitrogen; closes the second switch, turns off the vacuum pump, turns off the third switch, and then places the pipe at the tail of the fifth switch under the liquid surface of the high-density liquid alloy; S4. Fill the device with nitrogen until the non-transparent tank, pipe, and syringe are all filled with nitrogen, and then close the first switch; S5, turn on the second switch, turn on the vacuum pump, and suck the high-density liquid alloy into the non-transparent tank through the pipeline; when the high-density liquid alloy reaches the fourth switch, turn off the vacuum pump and turn off the second switch; S6, turn on the third switch, and use a syringe to push nitrogen into the non-transparent tank, so that space is left in the upper cavity of the non-transparent tank to store nitrogen; S7, close the third switch, close the fifth switch, open the first switch, fill the non-transparent tank with nitrogen and pressurize it; After the pressurization is completed, close the first switch and the fourth switch; S8. Remove the gas-filling and liquid-extracting equipment, retain the fourth switch and the fifth switch, and obtain a non-transparent tank filled with high-density liquid alloy.

7. The experimental method for isolating oxygen and filling high-density liquid alloy according to claim 6 is characterized in that: After the high-density liquid alloy is poured in as described in S1, the high-density liquid alloy and the dilute hydrochloric acid solution are separated into layers, and the high-density liquid alloy is located at the bottom of the container. The shaking process is used to separate the oxide film on the surface of the high-density liquid alloy.

8. The experimental method for isolating oxygen and filling high-density liquid alloy according to claim 6 is characterized in that: In the process of removing oxygen from all pipes and non-transparent tank bodies in S2, the pipe connected to the container is firstly taken out of the container liquid surface, and then the first switch and the vacuum pump are turned on to fill nitrogen into the non-transparent tank body cavity. The nitrogen is filled in from the top of the non-transparent tank body and discharged from the bottom.

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