Rectangular narrow slit channel experimental liquid level measuring tube and liquid level measuring system

Abstract

The present invention provides a rectangular narrow slit channel experimental liquid level measuring tube and a liquid level measuring system, which relate to the technical field of mechanical devices. The rectangular narrow slit channel experimental liquid level measuring tube includes a tube body and a flow guiding member. The first end of the tube body is a liquid inlet end, and a liquid discharge assembly is fixedly arranged at the second end of the tube body. The flow guiding member includes a flow guiding portion and a connecting portion. The size of the flow guiding portion gradually increases from the first end to the second end, and the connecting portion is fixedly arranged at the second end of the flow guiding portion. The flow guiding member is fixedly arranged at the first end of the tube body, and the first end of the flow guiding portion is close to the first end of the tube body, and the second end faces away from the first end of the tube body. A fluid channel is formed between the second end of the flow guiding portion and the inner wall of the tube body. There are a first communication port and a second communication port on the side wall of the tube body. The second communication port is located at the second end of the tube body, and the first communication port is located between the flow guiding member and the second communication port. The rectangular narrow slit channel experimental liquid level measuring tube and the liquid level measuring system alleviate the problem that the structure of the liquid measuring device is relatively complex.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical devices, and in particular to a rectangular narrow slit channel experimental liquid level measuring tube and a liquid level measuring system. Background Art

[0002] During the production or scientific research process, when it comes to a reaction system involving gas-liquid two-phase heating (especially the heat transfer experiment of fluid in a rectangular narrow slit channel), it is often necessary to collect the liquid in the gas-liquid mixture in order to measure the amount of liquid in the gas-liquid mixture in real time.

[0003] In the prior art, the liquid in the gas-liquid mixture is separated by a steam-water separator connected to the reaction system and the separated liquid is discharged to a corresponding measuring device to achieve the measurement of the amount of liquid in the gas-liquid mixture. However, in the prior art, the structure of the liquid measuring device is usually relatively complex, which is not conducive to the smooth progress of production and scientific research. Summary of the Invention

[0004] The first object of the present invention is to provide a rectangular narrow slit channel experimental liquid level measuring tube to alleviate the technical problem that the structure of the liquid measuring device in the fluid rectangular narrow slit channel experiment in the prior art is relatively complex.

[0005] The rectangular narrow slit channel experimental liquid level measuring tube provided by the present invention includes a tube body and a guiding member. The first end of the tube body is a liquid inlet end, and the second end of the tube body is closed and provided with a liquid discharge assembly; the guiding member includes a guiding portion and a connecting portion. The outer dimension of the guiding portion gradually increases from its first end to its second end, and the connecting portion is fixedly arranged at the second end of the guiding portion for fixedly connecting with the inner wall of the tube body;

[0006] The guiding member is fixedly arranged in the tube body and is located at the first end of the tube body. The first end of the guiding portion is close to the first end of the tube body, the second end of the guiding portion faces away from the first end of the tube body, and a fluid channel is formed between the second end of the guiding portion and the inner wall of the tube body;

[0007] The side wall of the tube body is provided with a first communication port and a second communication port at intervals. The second communication port is located at the second end of the tube body, and the first communication port is located between the guiding member and the second communication port; the first communication port and the second communication port are used for connecting with a differential pressure transmitter.

[0008] Further, the guiding portion includes a conical guiding cover, and the connecting portion is fixedly arranged on the guiding cover.

[0009] Further, the connecting portion includes a plurality of connecting feet arranged at intervals at the second end of the guiding portion.

[0010] Furthermore, the length of the connecting foot can be adjusted.

[0011] Furthermore, a plurality of threaded holes are spaced apart from the second end of the guiding portion. The connecting foot includes a screw rod that matches the threaded hole. One end of the screw rod is connected to the corresponding threaded hole, and the other end is used to connect to the inner wall of the pipe body.

[0012] Furthermore, the connecting foot includes an outer sleeve tube fixedly connected to the guiding portion and an inner rod body used to connect to the inner wall of the pipe body. The inner rod body is inserted into the outer sleeve tube. A connecting component is provided on the inner rod body. A plurality of connecting holes are spaced apart along the length direction of the outer sleeve tube. When the connecting component is connected to different connecting holes, the length of the connecting foot is different.

[0013] Furthermore, an installation hole is provided on the inner rod body, and the aperture of one end of the installation hole facing the connecting hole is smaller than the aperture of the end of the installation hole facing away from the connecting hole.

[0014] The connecting component includes an elastic member, a limiting head, and a blocking member. Among them, the blocking member is fixedly provided at the end of the installation hole facing away from the connecting hole. The elastic member is disposed in the installation hole, and one end of the elastic member is connected to the blocking member, and the other end is connected to the limiting head. At least a part of the limiting head is always located in the installation hole. When the elastic member is in a natural state, the limiting head can protrude from the installation hole and be caught in the corresponding connecting hole.

[0015] Furthermore, a heat insulation layer is coated on the outside of the pipe body.

[0016] Furthermore, the liquid discharge assembly includes a drain valve, and / or a flange is fixedly provided at the first end of the pipe body.

[0017] The beneficial effects of the rectangular narrow slit channel experimental liquid level measuring pipe provided by the present invention compared with the prior art are as follows:

[0018] The rectangular narrow slit channel experimental liquid level measuring pipe provided by the present invention includes a pipe body and a guiding member. The first end of the pipe body is a liquid inlet end, and the second end of the pipe body is closed and provided with a liquid discharge assembly. The guiding member includes a guiding portion and a connecting portion. The outer dimension of the guiding portion gradually increases from its own first end to its own second end. The connecting portion is fixedly provided at the second end of the guiding portion and is used to be fixedly connected to the inner wall of the pipe body. The guiding member is fixedly provided at the first end of the pipe body, and the first end of the guiding portion is close to the first end of the pipe body. The second end of the guiding portion faces away from the first end of the pipe body. A fluid channel is formed between the second end of the guiding portion and the inner wall of the pipe body. A first communication port and a second communication port are spaced apart on the side wall of the pipe body. The second communication port is located at the second end of the pipe body, and the first communication port is located between the guiding member and the second communication port. The first communication port and the second communication port are used to connect to a differential pressure transmitter.

[0019] When measuring the liquid level using the rectangular narrow-slit channel experimental liquid level measuring tube provided by the present invention, the rectangular narrow-slit channel experimental liquid level measuring tube is connected to the reaction system and placed vertically, with the first end of the tube body facing upward and the second end facing downward, so that the liquid can flow into the tube body from the first end of the tube body. The first communication port and the second communication port are arranged at intervals on the side wall of the tube body. The second communication port is located at the second end of the tube body, and the first communication port is located between the guiding member and the second communication port. It is connected to the differential pressure transmitter through the first communication port and the second communication port, so that the differential pressure between the first communication port and the second communication port can be obtained. The user can inversely deduce the liquid level height in the tube body based on the obtained differential pressure, and then calculate the mass of the liquid in the tube body in combination with the density of the liquid and the inner diameter of the tube body. This not only simplifies the structure of the liquid measuring device but also makes the operation of liquid level measurement more feasible.

[0020] In addition, after the liquid flows into the tube body from the first end of the tube body, due to the guiding effect of the guiding member, it flows into the tube body through the fluid channel between the second end of the guiding portion and the inner wall of the tube body. The fluid passing through the guiding member will gradually flow towards the inner wall of the tube body, which can make the fluid flow along the inner wall of the tube body, so that the liquid level can increase slowly, avoiding the situation where the liquid drops directly into the tube body causing liquid droplet splashing and resulting in huge fluctuations in liquid level measurement.

[0021] The second object of the present invention is to provide a liquid level measurement system to alleviate the technical problem that the structure of the liquid measuring device in the prior art is relatively complex.

[0022] The liquid level measurement system provided by the present invention includes a steam-water separator, a differential pressure transmitter, a thermocouple, a pressure measurement component, and the rectangular narrow-slit channel experimental liquid level measuring tube described above. The steam-water separator can be connected to the reaction system. The rectangular narrow-slit channel experimental liquid level measuring tube is arranged vertically, and the first end of the tube body is located above the second end of the tube body. The first end of the tube body is communicated with the drain port of the steam-water separator;

[0023] The pressure measurement component is used to measure the pressure of the reaction system, and the thermocouple is used to measure the temperature of the liquid in the tube body.

[0024] The beneficial effects of the liquid level measurement system provided by the present invention compared with the prior art are as follows:

[0025] The liquid level measurement system provided by the present invention includes the rectangular narrow slit channel experimental liquid level measurement tube described above, and can achieve the beneficial effects that the rectangular narrow slit channel experimental liquid level measurement tube can achieve. Moreover, by providing a pressure measurement component for measuring the pressure of the reaction system and a thermocouple for measuring the temperature of the liquid in the tube body, the temperature of the liquid and the pressure of the environment where the liquid is located can be obtained, which is conducive to obtaining an accurate density value of the liquid and making the solved liquid mass more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of the rectangular narrow slit channel experimental liquid level measurement tube provided in Embodiment 1 of the present invention;

[0028] Figure 2 It is a front view of the flow guiding member in the rectangular narrow slit channel experimental liquid level measurement tube provided in Embodiment 1 of the present invention;

[0029] Figure 3 It is a top view of the flow guiding member and the tube body in the rectangular narrow slit channel experimental liquid level measurement tube provided in Embodiment 1 of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the connection component in the rectangular narrow slit channel experimental liquid level measurement tube provided in Embodiment 1 of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure when an adjustment plate is provided outside the flow guiding part in the rectangular narrow slit channel experimental liquid level measurement tube provided in Embodiment 1 of the present invention.

[0032] Reference numerals: 1 - tube body; 2 - flow guiding member; 3 - liquid discharge component; 4 - flange; 11 - first communication port; 12 - second communication port; 21 - flow guiding part; 22 - connecting foot; 23 - adjustment plate; 24 - limiting component; 100 - fluid channel; 221 - outer sleeve; 222 - inner rod body; 223 - connection component; 224 - elastic member; 225 - limiting head; 226 - plugging member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0034] 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", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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 should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that unless otherwise clearly defined 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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 circumstances.

[0036] Embodiment 1

[0037] As Figure 1 shown, the experimental liquid level measuring tube with a rectangular narrow slit channel provided in this embodiment includes a tube body 1 and a flow guiding member 2. The first end of the tube body 1 is the liquid inlet end, and the second end of the tube body 1 is closed and provided with a liquid discharge assembly 3. The flow guiding member 2 includes a flow guiding portion 21 and a connecting portion. The outer dimension of the flow guiding portion 21 gradually increases from its own first end to its own second end. The connecting portion is fixedly arranged at the second end of the flow guiding portion 21 and is used for fixedly connecting with the inner wall of the tube body 1. The flow guiding member 2 is fixedly arranged in the tube body 1 and is located at the first end of the tube body 1. The first end of the flow guiding portion 21 is close to the first end of the tube body 1, the second end of the flow guiding portion 21 faces away from the first end of the tube body 1, and a fluid channel 100 is formed between the second end of the flow guiding portion 21 and the inner wall of the tube body 1. First communication ports 11 and second communication ports 12 are arranged at intervals on the side wall of the tube body 1. The second communication ports 12 are located at the second end of the tube body 1, and the first communication ports 11 are located between the flow guiding member 2 and the second communication ports 12. The first communication ports 11 and the second communication ports 12 are used for connecting with a differential pressure transmitter.

[0038] When measuring the liquid level using the rectangular narrow slit channel experimental liquid level measuring tube provided in this embodiment, connect the rectangular narrow slit channel experimental liquid level measuring tube to the reaction system and place it vertically, with the first end of the tube body 1 facing upward and the second end facing downward, so that the liquid can flow into the first end of the tube body 1. The first communication port 11 and the second communication port 12 are arranged at intervals on the side wall of the tube body 1. The second communication port 12 is located at the second end of the tube body 1, and the first communication port 11 is located between the flow guide member 2 and the second communication port 12. Connect to the differential pressure transmitter through the first communication port 11 and the second communication port 12, so as to obtain the pressure difference between the first communication port 11 and the second communication port 12. The user can inversely deduce the liquid level height in the tube body 1 based on the obtained pressure difference, and then calculate the mass of the liquid in the tube body 1 in combination with the density of the liquid and the inner diameter of the tube body 1. This not only simplifies the structure of the liquid measuring device but also makes the operation of liquid level measurement more feasible.

[0039] In addition, after the liquid flows into the first end of the tube body 1, due to the guiding effect of the flow guide member 2, it flows into the tube body 1 through the fluid channel 100 between the second end of the guiding portion 21 and the inner wall of the tube body 1. The fluid passing through the flow guide member 2 will gradually flow towards the inner wall of the tube body 1, which can make the fluid flow along the inner wall of the tube body 1, so that the liquid level can increase slowly, avoiding the situation where the liquid directly falls into the tube body 1 and causing liquid droplets to splash, resulting in huge fluctuations in liquid level measurement.

[0040] Specifically, the tube body 1 can be a stainless steel tube body 1. The outer diameter and wall thickness of the tube body 1 depend on the system pressure and the estimated liquid inventory, and the material of the tube body 1 can be stainless steel.

[0041] The first communication port 11 and the second communication port 12 are used to connect to the differential pressure transmitter. Specifically, a first transition tube can be connected and set at the first communication port 11, and a second transition tube can be connected and set at the second communication port 12. The first transition tube is connected to one pressure guiding tube of the differential pressure transmitter through a first ferrule joint, and the second transition tube is connected to the other pressure guiding tube of the differential pressure transmitter through a second ferrule joint.

[0042] The second communication port 12 is located at the second end of the tube body 1 for connecting to the differential pressure transmitter. Obviously, the second communication port 12 is set at the bottommost end of the inner cavity of the tube body 1.

[0043] Such as Figure 2 and Figure 3 As shown, in the alternative technical solution of this embodiment, the guiding portion 21 can include a conical guiding cover, and the connecting portion is fixedly arranged on the guiding cover.

[0044] The guiding portion 21 includes a conical guiding cover. On the one hand, compared with a solid structure, it is lighter in weight and more material-saving; on the other hand, it also makes the processing and manufacturing of the flow guide member 2 more convenient.

[0045] Specifically, the air deflector can be made of a stainless steel thin plate.

[0046] As an alternative, the air guide portion 21 may also be a pyramid-shaped air guide cover.

[0047] In an optional technical solution of this embodiment, the connecting portion may include a plurality of connecting pins 22 arranged at intervals at the second end of the guide portion 21 .

[0048] The connecting portion includes a plurality of connecting pins 22 spaced apart at the second end of the flow guide portion 21 , and is connected to the inner wall of the tube body 1 via the connecting pins 22 , which has little influence on the fluid channel 100 .

[0049] Specifically, the connecting pins 22 may be 3, 4 or 5, etc., evenly distributed at the second end of the guide part 21; the connecting pins 22 and the guide part 21 and the inner wall of the tube body 1 may be welded or bonded, etc.

[0050] Furthermore, a guiding slope may be provided on the connecting pin 22 , and the guiding slope can reduce the blocking effect of the connecting pin 22 on the liquid.

[0051] In an optional technical solution of this embodiment, the length of the connecting pin 22 may be adjustable.

[0052] The length of the connecting foot 22 can be adjusted so that the flow guide 2 can match the pipe body 1 with different inner diameters.

[0053] Specifically, before the guide member 2 is installed into the tube body 1 , the length of each connecting pin 22 can be adjusted according to the inner diameter of the tube body 1 so that the length of each connecting pin 22 is adapted to the size of the tube body 1 , thereby enabling the guide member 2 to be connected to the inner wall of the tube body 1 .

[0054] In an optional technical solution of this embodiment, a plurality of threaded holes may be arranged at intervals on the second end of the flow guide 21, and the connecting foot 22 includes a screw matched with the threaded hole, one end of the screw is connected to the corresponding threaded hole, and the other end is used to connect with the inner wall of the tube body 1. Before the flow guide 2 is installed into the tube body 1, if the length of the connecting foot 22 needs to be adjusted, the depth of the screw screwed into the threaded hole can be changed.

[0055] Specifically, the threaded holes may correspond to the screw rods one by one, and the number of the threaded holes may be greater than the number of the screw rods.

[0056] Furthermore, the connecting foot 22 may also include a connecting rod, one end of which is fixedly connected to an end of the screw rod away from the threaded hole, and the other end of the connecting rod is fixedly connected to the inner wall of the tube body 1 .

[0057] like Figure 4As shown in the figure, as an alternative solution, in the optional technical solution of this embodiment, the connecting pin 22 may include an outer sleeve 221 fixedly connected to the diversion part 21 and an inner rod 222 for connecting to the inner wall of the pipe body 1, and the inner rod 222 is inserted into the outer sleeve 221. A connecting assembly 223 is provided on the inner rod 222, and a plurality of connecting holes are arranged at intervals along the length direction of the outer sleeve 221. When the connecting assembly 223 is connected to different connecting holes, the length of the connecting pin 22 is different.

[0058] Specifically, both the outer sleeve 221 and the inner rod 222 may be square; the outer sleeve 221 may be completely within the projection range of the diversion part 21 in the vertical direction, or a part of it may be within the projection range of the diversion part 21 in the vertical direction; among them, when both the outer sleeve 221 and the inner rod 222 are square, the connecting holes may be provided on the side wall of the first end of the outer sleeve 221 facing away from the diversion part 21.

[0059] In the optional technical solution of this embodiment, an installation hole may be provided on the inner rod 222, and the aperture of the end of the installation hole facing the connecting hole is smaller than the aperture of the end of the installation hole facing away from the connecting hole. The connecting assembly 223 may include an elastic member 224, a limiting head 225, and a plugging member 226. Among them, the plugging member 226 is fixedly arranged at the end of the installation hole facing away from the connecting hole, the elastic member 224 is arranged in the installation hole, one end of the elastic member 224 is connected to the plugging member 226, and the other end is connected to the limiting head 225, and at least a part of the limiting head 225 is always located in the installation hole. When the elastic member 224 is in a natural state, the limiting head 225 can protrude from the installation hole and be stuck into the corresponding connecting hole.

[0060] When it is necessary to adjust the length of the connecting pin 22, pull the inner rod 222 and change the connection with the connecting hole on the outer sleeve 221 connected to the limiting head 225 on the inner rod 222, which makes the length adjustment of the connecting pin 22 more convenient.

[0061] Specifically, the elastic member 224 may be a spring, and the plugging member 226 may be a set screw.

[0062] The limiting head 225 may include a first part in the shape of a circular plate and a second part in the shape of a hemisphere. The second part is fixedly connected to the first part, and the diameter of the second part is smaller than the diameter of the first part. The first part is always located in the installation hole and can move along the axis of the installation hole under the action of an external force.

[0063] In the optional technical solution of this embodiment, a heat insulation layer may be coated on the outside of the pipe body 1.

[0064] The rectangular narrow slit channel experimental liquid level measuring tube is mostly used in two-phase heating systems, that is, most of the separated liquids are in a high-temperature state. Coating a heat insulation layer on the outside of the pipe body 1 can make the liquid falling into the pipe body 1 almost keep the temperature unchanged.

[0065] Specifically, the thermal insulation layer may be thermal insulation cotton.

[0066] In an optional technical solution of this embodiment, the liquid discharge component 3 may include a drain valve, and / or a flange 4 is fixedly provided at the first end of the tube body 1, and the flange 4 is used to be connected to the reaction system.

[0067] Specifically, the flange 4 can be made of stainless steel, and the specific size of the flange 4 can be determined according to the outer diameter of the pipe body 1; the flange 4 can be used to connect to the drain port of the gas-liquid separator.

[0068] After the reaction condition is finished, open the drain valve to drain the water in the rectangular narrow slit channel experimental liquid level measuring tube, and then the next reaction condition can be carried out.

[0069] like Figure 5 As shown, in the optional technical solution of this embodiment, an adjustment plate 23 located between two adjacent connecting legs 22 may be further provided on the outside of the guide portion 21, the adjustment plate 23 can be fitted with the outer surface of the guide portion 21, and a plurality of position-limiting blind holes are arranged at intervals on the adjustment plate 23 along the direction from the first end of the guide portion 21 to the second end of the guide portion 21. A position-limiting assembly 24 for connecting with the position-limiting blind hole is provided on the guide portion 21, and when the position-limiting assembly 24 is connected with different position-limiting blind holes, the length of the adjustment plate 23 extending out of the guide portion 21 is different.

[0070] An adjustment plate 23 is provided outside the guide portion 21. By changing the length of the adjustment plate 23 extending out of the guide portion 21, the size of the fluid channel 100 can be adjusted, so that the user can adjust the size of the fluid channel 100 as needed, making the rectangular narrow slit channel experimental liquid level measuring tube more applicable.

[0071] Specifically, a limiting mounting hole may be provided on the side wall of the guide portion 21, and the aperture of the limiting mounting hole at one end facing the limiting blind hole is smaller than the aperture of the limiting mounting hole at one end facing away from the limiting blind hole. The structure of the limiting assembly 24 may be the same as that of the connecting assembly 223, that is, the limiting assembly 24 may include an elastic member 224, a limiting head 225 and a blocking member 226, wherein the blocking member 226 is fixedly arranged at one end of the limiting mounting hole facing away from the limiting blind hole, the elastic member 224 is arranged in the limiting mounting hole, and one end of the elastic member 224 is connected to the blocking member 226, and the other end is connected to the limiting head 225, and at least a part of the limiting head 225 is always located in the limiting mounting hole. When the elastic member 224 is in a natural state, the limiting head 225 can pop out of the limiting mounting hole and snap into the corresponding limiting blind hole.

[0072] The limiting head 225 may include a first part in the shape of a circular plate and a second part in the shape of a hemisphere. The second part is fixedly connected to the first part, and the diameter of the second part is smaller than that of the first part. The first part is always located in the limiting mounting hole and can move along the axis of the limiting mounting hole under the action of an external force.

[0073] Embodiment 2

[0074] The liquid level measurement system provided in this embodiment includes a steam-water separator, a differential pressure transmitter, a thermocouple, a pressure measurement component, and the rectangular narrow-slit channel experimental liquid level measurement tube provided in Embodiment 1. The steam-water separator can be connected to the reaction system. The rectangular narrow-slit channel experimental liquid level measurement tube is arranged vertically, and the first end of the tube body 1 is located above the second end of the tube body 1. The first end of the tube body 1 is communicated with the drain outlet of the steam-water separator. The pressure measurement component is used to measure the pressure of the reaction system, and the thermocouple is used to measure the temperature of the liquid in the tube body 1.

[0075] The liquid level measurement system provided in this embodiment includes the rectangular narrow-slit channel experimental liquid level measurement tube provided in Embodiment 1, and can achieve the beneficial effects that the rectangular narrow-slit channel experimental liquid level measurement tube can achieve. Moreover, by providing a pressure measurement component for measuring the pressure of the reaction system and a thermocouple for measuring the temperature of the liquid in the tube body 1, the temperature of the liquid and the pressure of the environment where the liquid is located can be obtained, which is beneficial to obtaining the accurate density value of the liquid and making the solved liquid mass more accurate.

[0076] Specifically, a thermocouple installation hole may be provided at the second end of the tube body 1, and the thermocouple is installed in the thermocouple installation hole and extends into the tube body 1.

[0077] The pressure measurement component may be a pressure gauge or a pressure transmitter.

[0078] The method for measuring the liquid level using the liquid level measurement system provided in this embodiment may be as follows:

[0079] The pressure guiding tube of the differential pressure transmitter is pre-filled with water (this can ensure more accurate measurement results);

[0080] Open the liquid discharge component 3, drain the liquid in the tube body 1, and then close the liquid discharge component 3;

[0081] After the reaction starts, collect the data of the differential pressure transmitter, the thermocouple, and the pressure measurement component;

[0082] Calculate the height of the liquid level according to the reading of the differential pressure transmitter, and calculate the liquid volume according to the diameter of the tube body 1; then look up the density of the liquid through the measured pressure and temperature data (or assume the temperature is the saturation temperature corresponding to the system pressure), and further the liquid mass value can be obtained.

[0083] During the whole experiment process, the measuring pipe is insulated by the thermal insulation layer.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention 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 or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rectangular narrow slit channel experimental liquid level measuring tube, characterized in that, it comprises a tube body (1) and a flow guiding member (2). The first end of the tube body (1) is a liquid inlet end, and the second end of the tube body (1) is closed and provided with a liquid discharge assembly (3); the flow guiding member (2) comprises a flow guiding portion (21) and a connecting portion. The outer dimension of the flow guiding portion (21) gradually increases from its first end to its second end. The connecting portion is fixedly arranged at the second end of the flow guiding portion (21) and is used for fixedly connecting with the inner wall of the tube body (1); the flow guiding member (2) is fixedly arranged in the tube body (1) and is located at the first end of the tube body (1), and the first end of the flow guiding portion (21) is close to the first end of the tube body (1), the second end of the flow guiding portion (21) faces away from the first end of the tube body (1), and a fluid channel (100) is formed between the second end of the flow guiding portion (21) and the inner wall of the tube body (1); first communication ports (11) and second communication ports (12) are arranged at intervals on the side wall of the tube body (1). The second communication ports (12) are located at the second end of the tube body (1), and the first communication ports (11) are located between the flow guiding member (2) and the second communication ports (12); the first communication ports (11) and the second communication ports (12) are used for connecting with a differential pressure transmitter; the flow guiding portion (21) comprises a conical flow guiding cover, and the connecting portion is fixedly arranged on the flow guiding cover; the connecting portion comprises a plurality of connecting feet (22) arranged at intervals at the second end of the flow guiding portion (21); each connecting foot (22) comprises an outer sleeve tube (221) fixedly connected with the flow guiding portion (21) and an inner rod body (222) for connecting with the inner wall of the tube body (1). The inner rod body (222) is inserted into the outer sleeve tube (221); a connecting assembly (223) is arranged on the inner rod body (222), and a plurality of connecting holes are arranged at intervals along the length direction of the outer sleeve tube (221). When the connecting assembly (223) is connected with different connecting holes, the length of the connecting foot (22) is different; an installation hole is arranged on the inner rod body (222), and the aperture of one end of the installation hole facing the connecting hole is smaller than the aperture of the end of the installation hole facing away from the connecting hole; the connecting assembly (223) comprises an elastic member (224), a limiting head (225) and a plugging member (226). Among them, the plugging member (226) is fixedly arranged at the end of the installation hole facing away from the connecting hole. The elastic member (224) is arranged in the installation hole, one end of the elastic member (224) is connected with the plugging member (226), and the other end is connected with the limiting head (225). At least a part of the limiting head (225) is always located in the installation hole; when the elastic member (224) is in a natural state, the limiting head (225) can protrude out of the installation hole and be stuck into the corresponding connecting hole.

2. The rectangular narrow slit channel experimental liquid level measuring tube according to claim 1, characterized in that, the length of the connecting foot (22) can be adjusted.

3. The rectangular narrow slit channel experimental liquid level measuring tube according to claim 2, characterized in that, a plurality of threaded holes are spaced apart at the second end of the guiding portion (21), the connecting foot (22) includes a screw rod matching the threaded holes, one end of the screw rod is connected to the corresponding threaded hole, and the other end is used for connecting to the inner wall of the tube body (1).

4. The rectangular narrow slit channel experimental liquid level measuring tube according to any one of claims 1-3, characterized in that, a heat preservation layer is coated on the outside of the tube body (1).

5. The rectangular narrow slit channel experimental liquid level measuring tube according to any one of claims 1-3, characterized in that, the liquid discharge assembly (3) includes a drain valve, and / or a flange (4) is fixedly provided at the first end of the tube body (1).

6. A liquid level measuring system, characterized in that, it includes a steam-water separator, a differential pressure transmitter, a thermocouple, a pressure measuring assembly and the rectangular narrow slit channel experimental liquid level measuring tube according to any one of claims 1-5. The steam-water separator can be connected to a reaction system. The rectangular narrow slit channel experimental liquid level measuring tube is arranged vertically, and the first end of the tube body (1) is located above the second end of the tube body (1). The first end of the tube body (1) is communicated with the drain outlet of the steam-water separator; the pressure measuring assembly is used for measuring the pressure of the reaction system, and the thermocouple is used for measuring the temperature of the liquid in the tube body (1).

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