Liquid level measuring device

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, which is used for measuring the liquid level of a molten mass in a cold crucible and comprises a gas injection part, a liquid level measuring part and a control part, the gas supply part is in fluid communication with the gas injection part and external air so as to supply the external air to the gas injection part; the pressure measuring part is located between the gas injection part and the gas supply part and used for measuring the gas pressure in the gas injection part when the gas is injected so as to determine the liquid level of the molten mass according to the measured gas pressure; wherein the gas injection part forms a gas flow path, the gas flow path forms a gas injection port and a gas outlet port, external air enters the gas flow path from the gas injection port and enters the molten mass from the gas outlet port, the diameter of the gas injection port is smaller than that of the gas outlet port, and the section of the gas injection port is bell-shaped. According to the liquid level measuring device provided by the embodiment of the invention, the air outlet port can be prevented from being blocked, and the accuracy of a liquid level measuring result can be guaranteed.

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. 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 products 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 problem of clogging, resulting in inaccurate liquid level measurement results. 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 problems, an embodiment of the present application provides a liquid level measuring device for measuring the liquid level of a melt in a cold crucible, which includes a gas injection member, a gas providing member and a pressure measuring member. The gas injection member is configured to be able to enter below the liquid surface of the melt and inject gas into the melt; the gas providing 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 arranged between the gas injection member and the gas providing member, and is used to measure the gas pressure in the gas injection member 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; wherein the gas injection member forms a gas flow path, the gas flow path can inject external air into the melt, the gas providing member is in fluid communication with the gas flow path, and the pressure measuring member is used to measure the gas pressure in the gas flow path; the gas flow path is formed with a gas injection port and a gas outlet port, external air can enter the gas flow path from the gas injection port, and the gas in the gas flow path can enter the melt from the gas outlet port, the diameter of the gas injection port is smaller than the diameter of the gas outlet port, and the cross section of the gas injection port is bell-shaped.

[0007] The liquid level measuring device provided in the embodiment of the present application can avoid blockage of the gas outlet port due to solidification of the melt by setting the diameter of the gas injection port to be smaller than the diameter of the gas outlet port and setting the cross-section of the gas injection port to be bell-shaped, thereby ensuring that the gas injection part can discharge gas normally, which is beneficial to ensuring the accuracy of the liquid level measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] 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.

[0009] Figure 1 It is a schematic diagram of the structure of the liquid level measuring device provided in the embodiment of the present application.

[0010] Figure 2 yes Figure 1 A schematic structural diagram of a gas injection component of a liquid level measuring device is shown.

[0011] Figure 3 yes Figure 2 A partial enlarged view of region A of the gas injection member is shown.

[0012] Description of reference numerals:

[0013] 100. Liquid level measuring device;

[0014] 10. Gas injection component; 101. Cooling flow path; 11. Inner shell; 1101. Gas injection port; 1102. Gas outlet port; 111. First pipe fitting; 112. Second pipe fitting; 12. Outer shell; 1201. Coolant inlet; 1202. Coolant outlet; 1203. Gas inlet; 121. First body pipe fitting; 122. Second body pipe fitting; 13. Connecting part; 20. Gas providing component; 21. Driving component; 22. Measurement protection component; 30. Pressure measuring component.

[0015] 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

[0016] 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.

[0017] 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.

[0018] During the measurement process, the melt will enter the gas flow path and solidify to form a thin shell at the gas outlet. In the related art, the gas outlet of the measuring device used to measure the liquid level of the melt in the cold crucible is small, and the thin shell formed by the solidification of the melt is easy to block the gas outlet, resulting in the gas outlet being unable to discharge gas normally, thereby causing inaccurate measurement results.

[0019] In view of the above problems, 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, 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 1The structure schematic diagram of the gas injection component of the liquid level measuring device shown in the figure may include a gas injection component 10 , a gas providing component 20 and a pressure measuring component 30 . The gas injection member 10 is configured to be able to enter below the liquid surface of the molten body and inject gas into the molten body; the gas providing member 20 is connected to the gas injection member 10 and the external air fluid, and is used to provide external air to the gas injection member 10; the pressure measuring member 30 is arranged between the gas injection member 10 and the gas providing member 20, and is used to measure the air pressure in the gas injection member 10 when the gas is injected into the molten body, so as to determine the liquid level of the molten body according to the measured air pressure in the gas injection member 10; wherein, the gas injection member 10 forms a gas flow path, the gas flow path can inject external air into the molten body, the gas providing member 20 is connected to the gas flow path fluid, and the pressure measuring member 30 is used to measure the air pressure in the gas flow path; the gas flow path is formed with a gas injection port 1101 and a gas outlet port 1102, external air can enter the gas flow path from the gas injection port 1101, and the gas in the gas flow path can enter the molten body from the gas outlet port 1102, and the diameter of the gas injection port 1101 is smaller than the diameter of the gas outlet port 1102.

[0020] The liquid level measuring device 100 provided in the embodiment of the present application can avoid blockage of the gas outlet port 1102 due to solidification of the melt by setting the diameter of the gas injection port 1101 to be smaller than the diameter of the gas outlet port 1102 and setting the cross-section of the gas outlet port 1102 to be bell-shaped, so as to ensure that the gas injection part 10 can discharge gas normally, which is beneficial to ensure the accuracy of the liquid level measurement result.

[0021] See also Figure 2 In some embodiments, the gas injection member 10 may include 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 inner shell 11 forms a gas flow path, and the gas providing member 20 is in fluid communication with 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 together form a cooling flow path 101, and the coolant entering the cooling flow path 101 can cool the outer shell 12, the inner shell 11, and the two connecting parts 13; wherein, 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.

[0022] See also Figure 2and Figure 3 , Figure 3 yes Figure 2 A partial enlarged view of the A region of the gas injection member 10 is shown. In some embodiments, the inner shell 11 may include a first pipe 111 and a second pipe 112. The first pipe 111 and the second pipe 112 are fluidically connected and together form a gas flow path; the first pipe 111 forms a gas injection port 1101, and the second pipe 112 forms a gas outlet port 1102. External air can enter the first pipe 111 from the gas injection port 1101 and flow to the second pipe 112, and the gas in the second pipe 112 can enter the melt from the gas outlet port 1102; wherein the inner diameter of the first pipe 111 is smaller than the inner diameter of the second pipe 112, and the cross section of the second pipe 112 is bell-shaped. In such an embodiment, the inner diameter of the first tube 111 is smaller than the inner diameter of the second tube 112 and the cross-section of the second tube 112 is set to be bell-shaped, so that the diameter of the gas injection port 1101 is smaller than the diameter of the gas outlet port 1102, which is beneficial to avoid blockage of the gas outlet port 1102 due to solidification of the melt.

[0023] In some embodiments, the cooling flow path 101 includes a cooling descending channel located on one side of the outside of the inner shell 11 and a cooling ascending channel located on the other side of the outside of the inner shell 11; the cooling descending channel and the cooling ascending channel are connected at the bottom, and the coolant from the outside of the liquid level measuring device 100 can enter the cooling descending channel, flow to the cooling ascending channel, and return to the outside of the liquid level measuring device 100 from the cooling ascending channel.

[0024] 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 from the coolant inlet 1201, and the coolant in the cooling ascending channel 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, and the cooling ascending channel to ensure the overall cooling effect on the inner shell 11 and the outer shell 12.

[0025] In some embodiments, the gas injection member 10 further includes two partitions for dividing the cooling flow path 101 into a cooling descending channel and a cooling ascending channel; wherein each partition 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 a cooling descending channel and a cooling ascending channel by the partitions, so that the coolant can flow in the cooling flow path 101.

[0026] See also Figure 1In some embodiments, the gas providing member 20 includes 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 gas flow path; 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.

[0027] In some embodiments, the measurement protection member 22 may be a buffer tank.

[0028] In some embodiments, the outer shell 12 may include a main body and a connecting portion. The inner shell 11 is disposed inside the main body, and the main body, the inner shell 11 and the two connecting portions together form a cooling flow path 101, and the main body can enter below the liquid surface of the molten body; the connecting portion is fixedly connected to the main body and is used to be installed on the crucible cover of the cold crucible. In such an embodiment, the entire gas injection member 10 can be installed on the crucible cover of the cold crucible through the connecting portion, so as to inject gas into the molten body in the cold crucible.

[0029] In some embodiments, the distance between the connection portion of the housing 12 and the gas outlet port 1102 is a constant, and the distance between the connection portion of the housing 12 and the bottom of the melt is also a constant.

[0030] 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.

[0031] 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:

[0032] H=P / ρg+h.

[0033] Wherein, h represents the height from the gas outlet of the inner shell 11 to the bottom of the melt.

[0034] The height h of the gas outlet of the inner shell 11 from the bottom of the melt satisfies the following expression:

[0035] h=h1-h2.

[0036] In the formula, h1 represents the distance from the connection part of the outer shell 12 to the bottom of the melt, and h2 represents the distance from the connection part of the outer shell 12 to the gas outlet of the inner shell 11.

[0037] In some embodiments, the density ρ of a particular melt is related to the temperature of the melt, and the density of the melt can be determined based on the temperature of the melt and laboratory measurement data.

[0038] See also Figure 2and Figure 3 In some embodiments, the body of the housing 12 may include a first body pipe 121 and a second body pipe 122. The first body pipe 121 and the second body pipe 122 are in fluid communication; the first body pipe 121 and the second body pipe 122 are respectively located radially outside the second pipe 112 of the first pipe 111; the first body pipe 121 is shaped to match the first pipe 111, and the second body pipe 122 is shaped to match the second pipe 112, and the cross section of the second body pipe 122 is also bell-shaped. In such an embodiment, the above arrangement makes the gap between the first pipe 111 and the second body pipe 122 equal to the gap between the second pipe 112 and the second body pipe 122, thereby maintaining a uniform cooling effect of the coolant, which is conducive to reducing the temperature difference between the various parts.

[0039] 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.

[0040] 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.

[0041] 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 forms a gas flow path, and the gas flow path can inject external air into the molten body. The gas providing member is in fluid communication with the gas flow path, and the pressure measuring member is used to measure the gas pressure in the gas flow path. The gas flow path is formed with a gas injection port and a gas outlet port, external air can enter the gas flow path from the gas injection port, and the gas in the gas flow path can enter the molten body from the gas outlet port. The diameter of the gas injection port is smaller than the diameter of the gas outlet port, and the cross-section of the gas outlet port is bell-shaped.

2. The liquid level measuring device according to claim 1, characterized in that: The gas injection member comprises: An outer shell and an inner shell are arranged to be able to enter below the liquid surface of the molten body, the inner shell is arranged on the inner side of the outer shell, the inner shell forms the gas flow path, and the gas providing member is in fluid communication with 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, wherein the outer shell, the inner shell and the two connecting parts together form a cooling flow path, and 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 inner shell comprises: A first pipe and a second pipe, wherein the first pipe and the second pipe are in fluid communication and together form the gas flow path; The first pipe member forms the gas injection port, and the second pipe member forms the gas outlet port. External air can enter the first pipe member from the gas injection port and flow to the second pipe member, and the gas in the second pipe member can enter the molten body from the gas outlet port. The inner diameter of the first pipe is smaller than the inner diameter of the second pipe, and the cross section of the second pipe is bell-shaped.

4. 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.

5. The liquid level measuring device according to claim 4, 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.

6. The liquid level measuring device according to claim 4, 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.

7. The liquid level measuring device according to claim 1, 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 to deliver the external air to the gas flow path; 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.

8. The liquid level measuring device according to claim 3, 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.

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

10. The liquid level measuring device according to claim 8, characterized in that: The main body of the housing comprises: a first body tube and a second body tube, wherein the first body tube and the second body tube are in fluid communication; The first body pipe member and the second body pipe member are respectively located radially outside the second pipe member of the first pipe member; The first body pipe is matched with the first pipe in a conformal manner, the second body pipe is matched with the second pipe in a conformal manner, and the cross section of the second body pipe is also bell-shaped.

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