Liquid level measuring device and cold crucible

Abstract

The embodiment of the invention relates to the field of measurement of the liquid level of a flowing solid material, in particular to a liquid level measuring device and a cold crucible, and the liquid level measuring device is used for measuring the liquid level of a molten mass in the cold crucible and comprises a gas injection part, a gas providing part and a pressure measuring part. The gas injection piece enters the position below the liquid level of the molten mass; the gas supply part is in fluid communication with the gas injection part and external air and is used for supplying the external air to the gas injection part; the pressure measuring part is arranged between the gas injection part and the gas supply part and is used for measuring the gas pressure in the gas injection part when gas is injected into the molten mass so as to determine the liquid level of the molten mass according to the measured gas pressure in the gas injection part; wherein a cooling flow path is formed in the gas injection piece, and a cooling agent from the outside of the liquid level measuring device can enter the cooling flow path so as to cool the whole gas injection piece. According to the liquid level measuring device, the service life of the liquid level measuring device can be prolonged.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of measuring the liquid level of flowing solid materials, and in particular to a liquid level measuring device and a cold crucible. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] The cold crucible is the core equipment of the high-level radioactive liquid waste vitrification facility. It is used to receive the radioactive waste calcination products and glass beads, and heat the glass beads and the radioactive waste calcination products to a molten state through the induced current generated by the high-frequency coil in the cold crucible, and finally obtain a vitrified body of the radioactive waste liquid.

[0004] In order to ensure the solidification effect of radioactive waste liquid, after heating the glass beads and the radioactive waste liquid calcination product to a molten state, it is necessary to measure the liquid level of the molten body in the cold crucible. However, the measuring device used to measure the liquid level of the molten body in the cold crucible has a short service life. Summary of the invention

[0005] A brief overview of the present application is provided below in order to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify the key or important parts of the present application, nor is it intended to limit the scope of the present application. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0006] In view of the above technical problems, embodiments of the present application provide a liquid level measuring device and a cold crucible.

[0007] In the first aspect, an embodiment of the present application provides a liquid level measuring device for measuring the liquid level of a molten body in a cold crucible, which includes a gas injection member, a gas supply member, and a pressure measuring member. The gas injection member is configured to be able to enter below the liquid surface of the molten body and inject gas into the molten body; the gas supply member is in fluid communication with the gas injection member and the external air, and is used to provide external air to the gas injection member; the pressure measuring member is disposed between the gas injection member and the gas supply member, and is used to measure the gas pressure in the gas injection member when the gas is injected into the molten body, so as to determine the liquid level of the molten body according to the measured gas pressure in the gas injection member; wherein the gas injection member is formed with a cooling flow path, and the coolant from the outside of the liquid level measuring device can enter the cooling flow path to cool the entire gas injection member.

[0008] The liquid level measuring device provided in the embodiment of the present application cools the gas injection component by the coolant entering the cooling flow path, which can prevent the gas injection component from being corroded or melted by the molten body, and can prevent the gas injection component from being broken due to the temperature difference at the liquid surface, thereby increasing the service life of the liquid level measuring device itself.

[0009] In a second aspect, an embodiment of the present application provides a cold crucible, which includes a container, a cover, and a liquid level measuring device provided in an embodiment of the first aspect of the present application. The container is used to contain a molten body, and the cover is used to seal the container; the liquid level measuring device is installed on the cover and is used to measure the liquid level of the molten body in the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Other objects and advantages of the present application will become apparent from the following description of the embodiments of the present application with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the present application.

[0011] Figure 1 It is a schematic diagram of the structure of the liquid level measuring device provided in the embodiment of the present application.

[0012] Figure 2 yes Figure 1 A schematic structural diagram of a gas injection component of a liquid level measuring device is shown.

[0013] Figure 3 yes Figure 2 A partial perspective view of a gas injector is shown.

[0014] Description of reference numerals:

[0015] 100. Liquid level measuring device;

[0016] 10. Gas injection part; 101. Cooling flow path; 1011. Cooling descending channel; 1012. Cooling ascending channel; 11. Inner shell; 12. Outer shell; 1201. Coolant inlet; 1202. Coolant outlet; 1203. Gas inlet; 121. Main body; 122. Connecting part; 13. Connecting part; 14. Partitioning part; 20. Gas providing part; 21. Driving part; 22. Measurement protection part; 30. Pressure measuring part.

[0017] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding. DETAILED DESCRIPTION

[0018] Exemplary embodiments of the present application will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the content of this application.

[0019] It is also necessary to explain here that, in order to avoid obscuring the present application due to unnecessary details, only the device structure and / or processing steps closely related to the scheme according to the present application are shown in the accompanying drawings, while other details that are not very relevant to the present application are omitted.

[0020] In the related art, a liquid level measuring device made of ceramic material or metal material is usually used to measure the liquid level of the molten body in the cold crucible. However, since the molten body in the cold crucible may cause corrosion or melting of the metal material, the service life of the liquid level measuring device made of metal material is short; and the temperature of the molten body in the cold crucible is high (up to 1100-1800°C), the high temperature of the molten body may cause a large temperature difference at the liquid surface, and the large temperature difference may cause the liquid level measuring device made of ceramic material to break, thus shortening its service life.

[0021] In view of the above technical problems, embodiments of the present application provide a liquid level measuring device and a cold crucible.

[0022] The embodiment of the present application provides a liquid level measuring device for measuring the liquid level of a molten body in a cold crucible, see Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the structure of a liquid level measuring device provided in an embodiment of the present application, Figure 2 yes Figure 1 The schematic diagram of the structure of the gas injection part of the liquid level measuring device is shown. Figure 2The arrow in the figure indicates the flow direction of the coolant or gas, and the device includes a gas injection member 10, a gas supply member 20 and a pressure measuring member 30. The gas injection member 10 is configured to be able to enter below the liquid surface of the melt and inject gas into the melt; the gas supply member 20 is in fluid communication with the gas injection member 10 and the external air, and is used to provide external air to the gas injection member 10; the pressure measuring member 30 is disposed between the gas injection member 10 and the gas supply member 20, and is used to measure the gas pressure in the gas injection member 10 when the gas is injected into the melt, so as to determine the liquid level of the melt according to the measured gas pressure in the gas injection member 10; wherein, the gas injection member 10 is formed with a cooling flow path 101, and the coolant from the outside of the liquid level measuring device 100 can enter the cooling flow path 101 to cool the entire gas injection member 10.

[0023] The liquid level measuring device 100 provided in the embodiment of the present application cools the gas injection component 10 by the coolant entering the cooling flow path 101, which can prevent the gas injection component 10 from being corroded or melted by the molten body, and can prevent the gas injection component 10 from being broken due to the temperature difference at the liquid surface, thereby improving the service life of the liquid level measuring device 100 itself.

[0024] In some embodiments, the coolant may be cooling water. In some embodiments, the inner shell 11 may be a metal tube.

[0025] See also Figure 3 , Figure 3 yes Figure 2 The partial perspective view of the gas injection member 10 is shown. In some embodiments, the gas injection member 10 includes an outer shell 12, an inner shell 11 and two connecting parts 13. The outer shell 12 and the inner shell 11 are configured to be able to enter below the liquid surface of the melt. The inner shell 11 is arranged on the inner side of the outer shell 12. The gas provider 20 is in fluid communication with the inner shell 11. The external air provided by the gas provider 20 is injected into the melt through the inner shell 11. The two connecting parts 13 are arranged between the outer shell 12 and the inner shell 11, and are used to connect the outer shell 12 and the inner shell 11. The outer shell 12, the inner shell 11 and the two connecting parts 13 jointly form a cooling flow path 101. The coolant entering the cooling flow path 101 can cool the outer shell 12, the inner shell 11 and the two connecting parts 13. When the outer shell 12 and the inner shell 11 enter below the liquid surface of the melt, one of the two connecting parts 13 enters below the liquid surface of the melt, and the other connecting part 13 is located above the liquid surface of the melt. In such an embodiment, the outer shell 12, the inner shell 11 and the two connecting parts 13 together form a cooling flow path 101, so that the coolant entering the cooling flow path 101 can cool the outer shell 12, the inner shell 11 and the two connecting parts 13, which is beneficial to reducing the temperature difference at various parts of the gas injection component 10 and avoiding breakage of the gas injection component 10.

[0026] See also Figure 3 In some embodiments, the cooling flow path 101 may include a cooling descending channel 1011 located on one side of the outer portion of the inner shell 11 and a cooling ascending channel 1012 located on the other side of the outer portion of the inner shell 11; the cooling descending channel 1011 and the cooling ascending channel 1012 are connected at the bottom, and the coolant from the outside of the liquid level measuring device 100 can enter the cooling descending channel 1011, flow to the cooling ascending channel 1012, and return to the outside of the liquid level measuring device 100 from the cooling ascending channel 1012. In such an embodiment, the coolant can flow in the cooling descending channel 1011 and the cooling ascending channel 1012, which is conducive to improving the cooling effect of the inner shell 11 and the outer shell 12 as a whole.

[0027] See also Figure 2 In some embodiments, the outer shell 12 is formed with a coolant inlet 1201 and a coolant outlet 1202, and the coolant outside the liquid level measuring device 100 can enter the cooling descending channel 1011 from the coolant inlet 1201, and the coolant in the cooling ascending channel 1012 can return to the outside of the liquid level measuring device 100 through the coolant outlet 1202. In such an embodiment, the coolant from the outside of the liquid level measuring device 100 can circulate through the coolant inlet 1201, the coolant outlet 1202, the cooling descending channel 1011, and the cooling ascending channel 1012 to ensure the overall cooling effect on the inner shell 11 and the outer shell 12.

[0028] See also Figure 3 In some embodiments, the gas injection member 10 may further include two partitions 14 for dividing the cooling flow path 101 into a cooling descending channel 1011 and a cooling ascending channel 1012; wherein each partition 14 is connected to the outer wall of the inner shell 11, the inner wall of the outer shell 12, and the connecting portion 13 located above the liquid surface of the molten body. In such an embodiment, the cooling flow path 101 is divided into the cooling descending channel 1011 and the cooling ascending channel 1012 by the partition 14, so that the coolant can flow in the cooling flow path 101.

[0029] See also Figure 1 In some embodiments, the gas providing member 20 may include a driving member 21 and a measuring protection member 22. The driving member 21 is in communication with the external air and the gas flow path, and is used to deliver the external air to the inner shell 11; the measuring protection member 22 is disposed between the driving member 21 and the pressure measuring member 30, and is used to protect the pressure measuring member 30, and prevent the air delivered by the driving member 21 from damaging the pressure measuring member 30. In such an embodiment, the instantaneous impact of the external air delivered by the driving member 21 can be buffered, thereby protecting the pressure measuring member 30, and preventing the pressure measuring member 30 from being damaged.

[0030] In some embodiments, the measurement protection member 22 may be a buffer tank.

[0031] See also Figure 2 In some embodiments, the outer shell 12 may include a body 121 and a connection portion 122. The inner shell 11 is disposed inside the body 121. The body 121, the inner shell 11 and the two connection portions 122 together form a cooling flow path 101. The body 121 can enter below the liquid surface of the molten body. The connection portion 122 is fixedly connected to the body 121 and is used to be installed on the lid of the cold crucible. In such an embodiment, the entire gas injection member 10 can be installed on the lid of the cold crucible through the connection portion 122, so as to inject gas into the molten body in the cold crucible.

[0032] In some embodiments, the distance between the connection portion 122 of the outer shell 12 and the gas outlet of the inner shell 11 is a constant, and the distance between the connection portion 122 of the outer shell 12 and the bottom of the melt is also a constant.

[0033] In some embodiments, the liquid level of the melt may be determined based on the gas pressure measured by the pressure measuring element 30 and the density of the melt.

[0034] Specifically, the liquid level H of the melt, the air pressure P measured by the pressure measuring member 30, and the density ρ of the melt satisfy the following expression:

[0035] H=P / ρg+h.

[0036] Wherein, h represents the height from the gas outlet of the inner shell 11 to the bottom of the melt.

[0037] The height h of the gas outlet of the inner shell 11 from the bottom of the melt satisfies the following expression:

[0038] h=h1-h2.

[0039] In the formula, h1 represents the distance between the connection portion 122 of the outer shell 12 and the bottom of the melt, and h2 represents the distance between the connection portion 122 of the outer shell 12 and the gas outlet of the inner shell 11.

[0040] In some embodiments, the density ρ of the melt is related to the temperature of the melt, and the density of the melt can be determined according to the temperature of the melt.

[0041] In some embodiments, the outer shell 12 further forms a gas inlet 1203, which is in communication with the gas provider 20 and the inner shell 11, and the gas from the gas provider 20 can enter the inner shell 11 via the gas inlet 1203. In such an embodiment, by forming the gas inlet 1203, the gas from the gas provider 20 can enter the inner shell 11, thereby enabling the gas to be injected into the melt through the inner shell 11.

[0042] The embodiment of the present application also provides a cold crucible, which includes a container, a cover, and a liquid level measuring device 100 provided in the embodiment of the present application. The container is used to contain the melt, and the cover is used to close the container; the liquid level measuring device 100 is installed on the cover to measure the liquid level of the melt in the container.

[0043] Regarding the embodiments of the present application, it should also be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other to obtain new embodiments.

[0044] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A liquid level measuring device for measuring the liquid level of a molten body in a cold crucible, characterized in that: include: A gas injection member, configured to be able to enter below the liquid surface of the molten body and inject gas into the molten body; a gas providing member, in fluid communication with the gas injection member and external air, for providing external air to the gas injection member; a pressure measuring member, disposed between the gas injection member and the gas providing member, for measuring the gas pressure in the gas injection member when the gas is injected into the molten body, so as to determine the liquid level of the molten body according to the measured gas pressure in the gas injection member; The gas injection member is formed with a cooling flow path, and the coolant from outside the liquid level measuring device can enter the cooling flow path to cool the entire gas injection member.

2. The liquid level measuring device according to claim 1, characterized in that: The gas injection member comprises: The outer shell and the inner shell are arranged to be able to enter below the liquid surface of the molten body, and the inner shell is arranged on the inner side of the outer shell. The gas provider is in fluid communication with the inner shell, and external air provided by the gas provider is injected into the melt via the inner shell; Two connecting parts are provided between the outer shell and the inner shell, and are used to connect the outer shell and the inner shell. The outer shell, the inner shell and the two connecting parts together form the cooling flow path. The coolant entering the cooling flow path can cool the outer shell, the inner shell and the two connecting parts. Wherein, when the outer shell and the inner shell enter below the liquid surface of the molten body, one of the two connecting parts enters below the liquid surface of the molten body, and the other connecting part is located above the liquid surface of the molten body.

3. The liquid level measuring device according to claim 2, characterized in that: The cooling flow path includes a cooling descending channel located on one side of the outer side of the inner shell and a cooling ascending channel located on the other side of the outer side of the inner shell; The cooling descending channel is connected to the cooling ascending channel at the bottom, and the coolant from the outside of the liquid level measuring device can enter the cooling descending channel, flow to the cooling ascending channel, and return to the outside of the liquid level measuring device from the cooling ascending channel.

4. The liquid level measuring device according to claim 3, characterized in that: The housing is formed with a coolant inlet and a coolant outlet. The coolant outside the liquid level measuring device can enter the cooling descending channel from the coolant inlet, and the coolant in the cooling ascending channel can return to the outside of the liquid level measuring device through the coolant outlet.

5. The liquid level measuring device according to claim 3, characterized in that: The gas injection member further comprises: two partitions, used to divide the cooling flow path into the cooling descending channel and the cooling ascending channel; Wherein, each of the partitions is connected to the outer wall of the inner shell, the inner wall of the outer shell, and a connecting portion located above the liquid surface of the molten body.

6. The liquid level measuring device according to claim 5, characterized in that: The gas providing member comprises: a driving member, which is in communication with the external air and the gas flow path and is used for conveying the external air to the inner shell; The measuring protection member is arranged between the driving member and the pressure measuring member, and is used to protect the pressure measuring member and prevent the air delivered by the driving member from damaging the pressure measuring member.

7. The liquid level measuring device according to claim 2, characterized in that: The housing comprises: A main body, the inner shell is arranged on the inner side of the main body, the main body, the inner shell and the two connecting parts together form the cooling flow path, and the main body can enter below the liquid surface of the molten body; The connecting part is fixedly connected to the main body and is used for being installed on the crucible cover of the cold crucible.

8. The liquid level measuring device according to claim 7, characterized in that: The distance between the connection part of the outer shell and the gas outlet of the inner shell is a constant value, and the distance between the connection part of the outer shell and the bottom of the molten body is also a constant value.

9. The liquid level measuring device according to claim 3, characterized in that: The outer shell further forms a gas inlet, which is in communication with the gas provider and the inner shell, and gas from the gas provider can enter the inner shell via the gas inlet.

10. A cold crucible, characterized in that: It comprises a container, a cover and a liquid level measuring device according to any one of claims 1 to 9, The container is used to contain the molten body, and the cover is used to seal the container. The liquid level measuring device is installed on the cover and is used to measure the liquid level of the molten body in the container.

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