Low-temperature gas-liquid two-phase flow liquid level metering device

Abstract

The application discloses a low-temperature gas-liquid two-phase flow liquid level metering device and relates to the field of liquid level meter bodies, which solves the problem that the existing liquid level meter bodies are difficult to obtain the liquid level data changes in the tank in time, and comprises a storage tank and a liquid level meter body, two installation sockets are installed on the outer side of the storage tank, installation pipes are installed on the inner sides of the two installation sockets, a pressure leading pipe is arranged at the end of the installation pipe, measuring tables are fixedly installed at one end of the pressure leading pipe, and the two measuring tables are installed at the two ends of the liquid level meter body; further comprising a pressure measuring mechanism for timely measuring the gas phase and oil phase pressure in the storage tank, which is installed on the inner side of the pressure leading pipe and comprises a sliding plate slidingly installed on the inner side of the pressure leading pipe; the pressure measuring mechanism makes the sliding plate rotate during movement, the rotating force of the sliding plate in the pressure leading pipe is utilized to quickly separate the condensed gas phase in the pressure leading pipe from the sliding plate, and thus the effect of accurate measurement is achieved.

Description

Technical Field

[0001] The invention relates to the field of liquid level gauge bodies, and in particular to a low-temperature gas-liquid two-phase flow liquid level measuring device. Background Art

[0002] Liquid level measurement refers to the technology used to measure the height of liquid, solid, or gas-liquid mixtures stored in containers or equipment. It is widely used in industrial process control, energy storage and transportation, chemical production, cryogenic engineering, and other fields. Its core goal is to accurately determine the position of the medium interface in real time.

[0003] When measuring the liquid level of low-temperature and high-pressure industrial storage tanks, a differential pressure level gauge is usually used to calculate the liquid level by measuring the pressure difference between the bottom and top of the tank. However, in a low-temperature environment, the sensor material of the differential pressure level gauge will become brittle, and there is a risk of rubber sealing failure. The existing differential pressure level gauge uses stainless steel as the sensor diaphragm, but the gas phase will block the pressure pipe when condensing. When the pressure in the tank changes suddenly, the diaphragm cannot promptly feedback the pressure in the tank, and the level gauge cannot promptly display the change in liquid level, affecting the data collection of the liquid level in the tank. Summary of the Invention

[0004] The object of the present invention is to provide a low-temperature gas-liquid two-phase flow level metering device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A low-temperature gas-liquid two-phase flow level metering device comprises: a storage tank and a level gauge body arranged on the outside of the storage tank, two vertically distributed mounting sockets are fixedly installed on the outside of the storage tank, mounting pipes are fixedly installed on the inner sides of the two mounting sockets, pressure pipes are provided at the ends of the mounting pipes, and a measuring meter is fixedly installed on the end of the pressure pipe away from the mounting pipe, and the two measuring meters are respectively installed at the two ends of the level gauge body; it also comprises: a pressure measuring mechanism for timely measuring the gas phase and oil phase pressure in the storage tank, the pressure measuring mechanism is installed on the inner side of the pressure pipe, and the pressure measuring mechanism includes a sliding mechanism installed on The slide on the inner side of the pressure-inducing tube can safely measure the pressure in the pressure-inducing tube; the sealing mechanism is used to seal the mounting tube during the disassembly of the pressure-inducing tube, and the sealing mechanism is installed on the inner side of the mounting tube. The sealing mechanism includes a sealing disk arranged on the inner side of the mounting tube, and the sealing disk can seal and protect the mounting tube; the degassing mechanism is used to liquefy and discharge the residual gas phase in the mounting tube, and the degassing mechanism is installed on the inner side of the pressure-inducing tube. The degassing mechanism includes a heating coil arranged on the inner side of the pressure-inducing tube, and the heating coil can heat the condensed gas phase in the mounting tube.

[0007] Preferably, the pressure measuring mechanism also includes a sliding rod fixedly mounted on the side of the slide away from the mounting tube, a positioning sleeve is provided on the outer side of the slide rod, the positioning sleeve is mounted on the inner side of the pressure-leading tube, and two spiral strips symmetrically distributed in the center are fixedly mounted on the inner side of the positioning sleeve, and a spiral groove matching the spiral strips is provided on the outer side of the slide rod, and a positioning shaft is fixedly mounted on the side of the slide close to the slide rod, and a push rack is rotatably mounted on the outer side of the positioning shaft, the push rack is slidably mounted on the outer side of the positioning sleeve, and a piston is fixedly mounted on the side of the push rack away from the positioning shaft, the piston is slidably mounted on the inner side of the pressure-leading tube, and a first spring is fixedly mounted between the inner side of the push rack and the positioning sleeve.

[0008] The cam is fixedly provided with two toothed plates at the top and bottom ends of the cam, and the cam is fixedly provided with a toothed plate on the top of the cam, and the toothed plate is fixedly provided with a toothed plate on the bottom ends of the cam.

[0009] Preferably, the degassing mechanism also includes a heat-conducting tube fixedly mounted on the heating coil near one end of the mounting tube, a groove for limiting the insertion of the heat-conducting tube is provided on the outer side of the mounting tube, the heating coil is docked with the measuring meter through a cable, a drainage groove is provided in the sealing groove of the mounting tube, a water storage box is fixedly mounted on the outer side of the sleeve, two symmetrically distributed elastic blocks are slidably mounted on the outer side of the mounting tube, and a first card slot and a second card slot are provided on the inner side of the sleeve for limiting the insertion of the elastic block.

[0010] Preferably, a plurality of scraping strips symmetrically distributed in the center are fixedly mounted on a side of the slide away from the slide rod, and the scraping strips are in contact with the inner side of the pressure-inducing tube.

[0011] Preferably, a plurality of sliding balls distributed symmetrically with respect to the center are fixedly mounted on the outer side of the push frame, and the sliding balls are in contact with the inner side of the pressure-inducing tube.

[0012] Preferably, an air injection valve is fixedly installed on the outer side of the pressure-inducing tube, and the air injection valve is located between the piston and the measuring meter.

[0013] Preferably, a round box is fixedly installed at the bottom of the mounting tube, two symmetrically distributed sleeve blocks are fixedly installed on the outer side of the rotating rod located at the bottom of the sealing disk, two symmetrically distributed fixed blocks are fixedly installed on the inner side of the round box, a slip ring is fixedly installed between the two fixed blocks, the sleeve block is slidably installed on the outer side of the slip ring, and two symmetrically distributed arc springs are provided on the outer side of the slip ring, and the arc springs are fixedly installed between the sleeve block and the fixed block.

[0014] Preferably, the sleeve is connected to the mounting socket via bolts.

[0015] Preferably, a water-absorbing cotton block is provided on the inner side of the water storage box.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention uses a pressure measuring mechanism to make the slide plate rotate during movement, and utilizes the rotational force of the slide plate in the pressure-inducing tube to quickly separate the slide plate from the condensed gas phase in the pressure-inducing tube, thereby solving the problem of blockage of the pressure-inducing tube after the gas phase condenses, thereby achieving the effect of accurate measurement.

[0018] The present invention uses a sealing mechanism, which can rotate the sealing disk inside the mounting tube to seal the mounting tube when the mounting tube is separated from the pressure-inducing tube, and the pressure-inducing tube can pull the insertion tube to move along the inside of the mounting tube to prevent leakage. That is, when the pressure-inducing tube is disassembled, the mounting tube is automatically sealed to prevent liquid and air leakage, thereby achieving the effect of safe disassembly and assembly.

[0019] The present invention uses a degassing mechanism to start the heating coil to heat the inner side of the installation pipe when the sealing disk seals the installation pipe, so that the condensed gas phase is liquefied into the water storage box for storage, which is convenient for cleaning the inner side of the installation pipe, thereby improving the convenience of cleaning the installation pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the measuring meter and the liquid level gauge body in the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the installation pipe and the pressure-inducing pipe in the present invention;

[0023] Figure 4 This is a schematic diagram of the sealing disk and piston structure of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the slide rod and the positioning sleeve in the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the insert rod and the push block in the present invention;

[0026] Figure 7 Schematic diagram of the elastic block and sleeve structure in the present invention;

[0027] Figure 8 It is a schematic diagram of the sleeve block and slip ring structure in the present invention.

[0028] In the figure: 1. Storage tank; 2. Liquid level gauge body; 3. Mounting socket; 4. Mounting pipe; 5. Pressure pipe; 6. Measuring meter; 7. Slide plate; 8. Sealing disk; 9. Heating coil; 10. Slide rod; 11. Positioning sleeve; 12. Spiral strip; 13. Push rack; 14. Piston; 15. First spring; 16. Rotating rod; 17. Gear; 18. Rack plate; 19. Push rod; 20. Push block; 21. Second spring; 22. Insert rod; 23. Sleeve; 24. Insert pipe; 25. Heat transfer tube; 26. Water storage box; 27. Elastic block; 28. Scraper; 29. ​​Sliding ball; 30. Air injection valve; 31. Round box; 32. Sleeve block; 33. Fixed block; 34. Slip ring; 35. Arc spring; 36. Water-absorbing cotton block; 37. Positioning shaft. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figures 1-8 The figure shows a low-temperature gas-liquid two-phase flow level metering device, which includes a storage tank 1 and a liquid level gauge body 2 arranged on the outside of the storage tank 1. Two vertically distributed mounting sockets 3 are fixedly installed on the outside of the storage tank 1, and a mounting pipe 4 is fixedly installed on the inner side of the two mounting sockets 3. A pressure-guiding pipe 5 is provided at the end of the mounting pipe 4. A measuring meter 6 is fixedly installed on the end of the pressure-guiding pipe 5 away from the mounting pipe 4. The two measuring meters 6 are respectively installed at both ends of the liquid level gauge body 2. The measuring meter 6 located at the upper end of the liquid level gauge body 2 is used to measure the gas phase in the storage tank 1, and the other measuring meter 6 is used to measure the liquid phase in the storage tank 1; it also includes: a pressure measuring mechanism for timely measuring the gas phase and oil phase pressures in the storage tank 1, and the pressure measuring mechanism is installed on the inner side of the pressure-guiding pipe 5.

[0031] The pressure measuring mechanism includes a slide plate 7 slidably mounted on the inner side of the pressure-guiding tube 5. The slide plate 7 can safely measure the pressure in the pressure-guiding tube 5. The pressure measuring mechanism also includes a slide bar 10 fixedly mounted on the side of the slide plate 7 away from the mounting tube 4. A positioning sleeve 11 is provided on the outer side of the slide bar 10. The positioning sleeve 11 is mounted on the inner side of the pressure-guiding tube 5. Two spiral strips 12 with a central symmetrical distribution are fixedly mounted on the inner side of the positioning sleeve 11. A spiral groove is provided on the outer side of the slide bar 10 to match the spiral strip 12. When the gas phase and liquid phase in the storage tank 1 enter the two pressure-guiding tubes 5 from the two mounting tubes 4 respectively, the pressure generated by the gas phase and the liquid phase can push the slide plate 7 to move, and the slide plate 7 pushes the slide bar 10 moves along the inner side of the positioning sleeve 11, so that the spiral groove on the outer side of the slide rod 10 moves along the outer side of the spiral strip 12, so that the slide plate 7 is in a rotating state during the movement, and the rotation force of the slide plate 7 in the pressure tube 5 is used to quickly separate the slide plate 7 from the condensed gas phase in the pressure tube 5, solving the problem of blocking the pressure tube 5 after the gas phase condenses. The side of the slide plate 7 close to the slide rod 10 is fixedly installed with a positioning shaft 37, and the outer side of the positioning shaft 37 is rotatably installed with a push frame 13. The push frame 13 is slidably installed on the outer side of the positioning sleeve 11, and the side of the push frame 13 away from the positioning shaft 37 is fixedly installed with a piston 14. The piston 14 is slidably installed on the inner side of the pressure tube 5, so that the slide plate When 7 moves, the pushing frame 13 can be pushed to move along the inner side of the positioning sleeve 11 through the positioning shaft 37, and the pushing frame 13 pushes the piston 14 to move along the inner side of the pressure-inducing pipe 5, compressing the air between the piston 14 and the measuring gauge 6, so that the measuring gauge 6 measures the air pressure. The two measuring gauges 6 transmit the data to the liquid level meter body 2, and the liquid level in the storage tank 1 is obtained. A first spring 15 is fixedly installed between the inner side of the pushing frame 13 and the positioning sleeve 11, so that the pushing frame 13 can compress the first spring 15 when it moves. When the pressure in the pressure-inducing pipe 5 is reduced, the first spring 15 can push the pushing frame 13 to reset the slide plate 7, and the slide plate 7 is fixed away from the side of the slide rod 10. A plurality of scrapers 28 are installed that are symmetrically distributed in the center. The scrapers 28 are in contact with the inner side of the pressure-inducing tube 5, so that when the slide 7 rotates, the scrapers 28 can scrape off the condensed gas phase on the inner side of the pressure-inducing tube 5. A plurality of sliding balls 29 are fixedly installed on the outer side of the push rack 13 that are symmetrically distributed in the center. The sliding balls 29 are in contact with the inner side of the pressure-inducing tube 5, so that when the push rack 13 moves, it can drive the sliding balls 29 to move along the inner side of the pressure-inducing tube 5. The sliding balls 29 can provide auxiliary support for the movement of the push rack 13. A gas injection valve 30 is fixedly installed on the outer side of the pressure-inducing tube 5. The gas injection valve 30 is located between the piston 14 and the measuring meter 6, which is convenient for the staff to inject gas between the piston 14 and the measuring meter 6.

[0032] Example 2: Please refer to Figure 3-Figure 8, this embodiment further explains Example 1. The sealing mechanism in the figure includes a sealing disk 8 arranged on the inner side of the mounting tube 4. The sealing disk 8 can seal and protect the mounting tube 4. The sealing mechanism also includes two rotating rods 16 symmetrically fixedly installed on the top and bottom of the sealing disk 8. The rotating rod 16 is rotatably installed on the inner side of the mounting tube 4, and a sealing groove for the limited sliding of the sealing disk 8 is opened on the inner side of the mounting tube 4, so that when the rotating rod 16 rotates, the sealing disk 8 can be driven to rotate along the sealing groove of the mounting tube 4 to realize the opening and closing of the mounting tube 4. A gear 17 is fixedly installed on the outer side of the rotating rod 16 at the top of the sealing disk 8, and a rack plate 18 cooperating with the gear 17 is slidably installed on the inside of the mounting tube 4. One end of the rack plate 18 is fixed A push rod 19 is fixedly installed, and a push block 20 is fixedly installed on one end of the push rod 19 away from the rack plate 18. A sliding cavity is opened inside the mounting tube 4 for limiting the sliding of the push block 20. A second spring 21 is fixedly installed between the push block 20 and the inner side of the sliding cavity. An insertion rod 22 is fixedly installed on one end of the pressure-inducing tube 5 close to the mounting tube 4. The insertion rod 22 is limited and inserted into the inner side of the sliding cavity. When the pressure-inducing tube 5 is docked with the mounting tube 4, the insertion rod 22 on the mounting tube 4 can push the push block 20 to move along the sliding cavity of the mounting tube 4, so that the push block 20 pushes the rack plate 18 to move through the push rod 19 and compresses the second spring 21. The rack plate 18 can drive the rotating rod 16 to rotate through the gear 17, and the rotating rod 16 can drive the sealing disk 8 to rotate, so that the sealing The disc 8 opens the mounting tube 4. Thus, when the mounting tube 4 is separated from the pressure-inducing tube 5, the resilience of the second spring 21 can be used to seal the sealing disc 8 against the mounting tube 4 to prevent leakage from the storage tank 1. One end of the pressure-inducing tube 5 close to the mounting tube 4 is fixedly installed with a sleeve 23 and a plug 24. The sleeve 23 is slidably installed on the outside of the mounting tube 4, and the plug 24 is slidably installed on the inside of the mounting tube 4. When the pressure-inducing tube 5 is away from the mounting tube 4, the plug 24 can move along the inside of the mounting tube 4 to prevent leakage from occurring during the process of the sealing disc 8 closing the mounting tube 4. A round box 31 is fixedly installed at the bottom of the mounting tube 4. Two symmetrically distributed sleeve blocks 32 are fixedly installed on the outside of the rotating rod 16 at the bottom of the sealing disc 8. Two symmetrically distributed fixed blocks 33 are fixedly installed on the inner side of the box 31, and a slip ring 34 is fixedly installed between the two fixed blocks 33. The sleeve block 32 is slidably installed on the outside of the slip ring 34, and two symmetrically distributed arc springs 35 are provided on the outside of the slip ring 34. The arc spring 35 is fixedly installed between the sleeve block 32 and the fixed block 33, so that when the rotating rod 16 rotates, it can drive the sleeve block 32 to move along the outside of the slip ring 34 and compress the arc spring 35. Therefore, the rebound force of the arc spring 35 can be used to facilitate the rotation and reset of the rotating rod 16. The two rotating rods 16 can smoothly drive the sealing disk 8 to seal the mounting tube 4. The sleeve 23 is docked with the mounting socket 3 by bolts, which is convenient for the installation of the mounting tube 4 and the pressure-guiding tube 5.

[0033] Example 3: Please refer to Figure 3-Figure 7 , this embodiment further illustrates other embodiments. The degassing mechanism in the figure includes a heating coil 9 arranged on the inner side of the pressure-inducing pipe 5. The heating coil 9 can heat the condensed gas phase in the mounting pipe 4. The degassing mechanism also includes a heat-conducting tube 25 fixedly installed on the heating coil 9 near one end of the mounting pipe 4. The outer side of the mounting pipe 4 is provided with a groove for limiting the insertion of the heat-conducting tube 25. The heating coil 9 is connected to the measuring meter 6 through a cable, so that the measuring meter 6 can start the heating coil 9 through the cable. The heating coil 9 can heat the inner side of the mounting pipe 4 through the heat-conducting tube 25 to liquefy the condensed gas phase. A drainage groove is provided in the sealing groove of the mounting pipe 4. The liquefied gas phase can enter the drainage groove through the sealing groove. A water storage box 26 is fixedly installed on the outer side of the sleeve 23, so that when the pressure-inducing pipe 5 moves, the sleeve 23 can drive the water storage box 2 6 is aligned with the drainage groove of the mounting tube 4, and the liquefied gas phase can enter the water storage box 26 through the drainage groove to realize the collection of the liquefied gas phase. Two symmetrically distributed elastic blocks 27 are slidably installed on the outer side of the mounting tube 4. The inner side of the sleeve 23 is provided with a first card slot and a second card slot for the elastic block 27 to limit the insertion. When the pressure-guiding tube 5 pulls the sleeve 23 to move along the outer side of the mounting tube 4, the inner side of the sleeve 23 can compress the elastic block 27, and when the elastic block 27 is aligned with the second card slot, the elastic block 27 can be inserted into the second card slot to provide auxiliary positioning between the sleeve 23 and the mounting tube 4. The drainage groove on the mounting tube 4 can be aligned with the water storage box 26, which is convenient for the discharge of the liquefied gas phase. A water-absorbing cotton block 36 is provided on the inner side of the water storage box 26, which can adsorb the liquefied gas phase in the water storage box 26.

[0034] Working principle: First, the staff aligns the two pressure-inducing pipes 5 with the two mounting pipes 4 respectively, so that the pressure-inducing pipe 5 drives the sleeve 23 to be sleeved on the outside of the mounting pipe 4, and inserts the inserting pipe 24 into the inner side of the mounting pipe 4, and the mounting pipe 4 drives the inserting rod 22 to be inserted into the inserting cavity of the mounting pipe 4, so that the inserting rod 22 contacts the pushing block 20 and pushes the pushing block 20 to move. The pushing block 20 compresses the second spring 21 and pushes the rack plate 18 to move through the pushing rod 19. The rack plate 18 drives the gear 17 to rotate, so that the gear 17 drives the sealing disk 8 to rotate through the corresponding rotating rod 16, so that the sealing disk 8 opens the mounting pipe 4. Subsequently, the first slot on the sleeve 23 is aligned with the elastic block 27, and the elasticity of the elastic block 27 is used to press against the first slot to achieve pre-positioning of the sleeve 23. The staff fixes the sleeve 23 to the mounting socket 3 by bolts, and the liquid phase and gas phase in the storage tank 1 respectively enter the two mounting pipes 4 and press against the outer side of the slide plate 7. When the inside of the storage tank 1 When the pressure of the liquid phase and the gas phase increases, the liquid phase and the gas phase push the slide plate 7 to move, and the slide plate 7 pushes the slide bar 10 to move along the inner side of the positioning sleeve 11, so that the spiral groove on the outer side of the slide bar 10 moves along the outer side of the spiral strip 12. The slide plate 7 can be in a rotating state during the movement, and the rotating force of the slide plate 7 in the pressure-guiding tube 5 is used to quickly separate the slide plate 7 from the condensed gas phase in the pressure-guiding tube 5, solving the problem of blockage of the pressure-guiding tube 5 after the gas phase condenses. At the same time, the slide plate 7 pushes the push frame 13 to move through the positioning shaft 37, and the push frame 13 moves along the inner side of the positioning sleeve 11, so that the push frame 13 pushes the piston 14 to move along the inner side of the pressure-guiding tube 5, compressing the air between the piston 14 and the measuring gauge 6, so that the measuring gauge 6 measures the air pressure, and the two measuring gauges 6 transmit the pressure data of the liquid phase and the pressure data of the gas phase to the liquid level gauge body 2 respectively, and obtain the liquid level in the storage tank 1, thereby achieving the effect of accurate measurement and timely obtaining the liquid level data of the storage tank 1;

[0035] When disassembling and maintaining the pressure-inducing pipe 5, the staff removes the sleeve 23 from the mounting socket 3 and pulls the pressure-inducing pipe 5 to move. The pressure-inducing pipe 5 pulls the sleeve 23 to move along the outside of the mounting pipe 4. The inner side of the sleeve 23 compresses the elastic block 27, and the insertion rod 22 moves along the sliding cavity of the mounting pipe 4. The rebound force of the second spring 21 is used to make the push block 20 pull the rack plate 18 to move through the push rod 19. The rack plate 18 drives the gear 17 to rotate and reset. The rotating rod 16 can drive the sealing disk 8 to rotate and reset, thereby sealing the mounting pipe 4. When the slots are aligned, the elastic block 27 is inserted into the second slot to pre-position the sleeve 23. At this time, the drainage groove on the mounting pipe 4 is aligned with the water storage box 26. The staff starts the heating coil 9 through the measuring meter 6, so that the heating coil 9 heats the condensed gas phase in the mounting pipe 4 through the heat conducting tube 25. The condensed gas phase is liquefied by the heat and falls into the sealing groove of the mounting pipe 4, and enters the water storage box 26 along the drainage groove. The liquid phase will also enter the corresponding water storage box 26 along the drainage groove to prevent leakage of the gas and liquid phases during disassembly, thereby improving the safety during disassembly and maintenance.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature gas-liquid two-phase flow level metering device, characterized in that: include: A material storage tank (1) and a liquid level gauge body (2), wherein two mounting sockets (3) are installed on the outside of the material storage tank (1), mounting tubes (4) are installed on the inside of the two mounting sockets (3), and pressure guide tubes (5) are provided at the ends of the mounting tubes (4), and a measuring meter (6) is fixedly installed at one end of the pressure guide tube (5), and the two measuring meters (6) are respectively installed at the two ends of the liquid level gauge body (2); Also includes: A pressure measuring mechanism is used to timely measure the gas phase and oil phase pressures in the storage tank (1). The pressure measuring mechanism is installed on the inner side of the pressure-inducing pipe (5). The pressure measuring mechanism includes a slide plate (7) slidably installed on the inner side of the pressure-inducing pipe (5). The slide plate (7) can safely measure the pressure in the pressure-inducing pipe (5). A slide bar (10) is installed on one side of the slide bar (7). A positioning sleeve (11) is provided on the outer side of the slide bar (10). The positioning sleeve (11) is installed on the inner side of the pressure-inducing pipe (5). Two spiral strips (12) are fixedly installed on the inner side of the sleeve (11), and a spiral groove that cooperates with the spiral strip (12) is opened on the outer side of the slide rod (10). The cooperation between the spiral groove on the outer side of the slide rod (10) and the spiral strip (12) makes the slide plate (7) rotate during the movement, and then the rotation force of the slide plate (7) in the pressure-inducing pipe (5) is used to quickly separate the slide plate (7) from the condensed gas phase in the pressure-inducing pipe (5), thereby solving the problem of the pressure-inducing pipe (5) being blocked by the condensation of the gas phase; A sealing mechanism for sealing the mounting tube (4) during the process of disassembling the pressure-inducing tube (5), wherein the sealing mechanism is installed on the inner side of the mounting tube (4), and the sealing mechanism includes a sealing disk (8) arranged on the inner side of the mounting tube (4), and the sealing disk (8) is capable of sealing and protecting the mounting tube (4); A degassing mechanism is used to liquefy and discharge the gas phase remaining in the installation pipe (4). The degassing mechanism is installed on the inner side of the pressure-inducing pipe (5). The degassing mechanism includes a heating coil (9) arranged on the inner side of the pressure-inducing pipe (5). The heating coil (9) can heat the gas phase condensed in the installation pipe (4).

2. A low-temperature gas-liquid two-phase flow level metering device according to claim 1, characterized in that: The pressure measuring mechanism further comprises a positioning shaft (37) mounted on one side of the slide (7), a push frame (13) being rotatably mounted on the outer side of the positioning shaft (37), the push frame (13) being slidably mounted on the outer side of the positioning sleeve (11), and a piston (14) being fixedly mounted on one side of the push frame (13), the piston (14) being slidably mounted on the inner side of the pressure-guiding tube (5), and a first spring (15) being fixedly mounted between the inner side of the push frame (13) and the positioning sleeve (11).

3. A low-temperature gas-liquid two-phase flow level metering device according to claim 2, characterized in that: The sealing mechanism further comprises two rotating rods (16) respectively mounted on the top and bottom of the sealing disk (8), the rotating rod (16) being rotatably mounted on the inner side of the mounting tube (4), and a sealing groove being provided on the inner side of the mounting tube (4), a gear (17) being fixedly mounted on the outer side of the rotating rod (16) located on the top of the sealing disk (8), a rack plate (18) being slidably mounted inside the mounting tube (4), a push rod (19) being mounted on one end of the rack plate (18), and the push rod ( 19), a push block (20) is fixedly installed at one end of the mounting tube (4), a sliding cavity is opened inside the mounting tube (4), a second spring (21) is installed between the push block (20) and the inner side of the sliding cavity, an insertion rod (22) is fixedly installed at one end of the pressure-guiding tube (5), a sleeve (23) and an insertion tube (24) are fixedly installed at one end of the pressure-guiding tube (5), the sleeve (23) is slidably installed on the outside of the mounting tube (4), and the insertion tube (24) is slidably installed on the inside of the mounting tube (4).

4. A low-temperature gas-liquid two-phase flow level metering device according to claim 3, characterized in that: The degassing mechanism further comprises a heat-conducting tube (25) mounted on one end of the heating coil (9); a groove for limiting insertion of the heat-conducting tube (25) is provided on the outer side of the mounting tube (4); the heating coil (9) is docked with the measuring meter (6) via a cable; a drainage groove is provided in the sealing groove of the mounting tube (4); a water storage box (26) is installed on the outer side of the sleeve (23); two elastic blocks (27) are slidably mounted on the outer side of the mounting tube (4); a first card slot and a second card slot are provided on the inner side of the sleeve (23) for limiting insertion of the elastic block (27).

5. The low-temperature gas-liquid two-phase flow level metering device according to claim 2, characterized in that: A plurality of scrapers (28) are fixedly mounted on one side of the slide plate (7), and the scrapers (28) are in contact with the inner side of the pressure-guiding tube (5).

6. A low-temperature gas-liquid two-phase flow level metering device according to claim 2, characterized in that: A plurality of sliding balls (29) are installed on the outer side of the push frame (13), and the sliding balls (29) are in contact with the inner side of the pressure-inducing tube (5).

7. The low-temperature gas-liquid two-phase flow level metering device according to claim 2, characterized in that: An air injection valve (30) is installed on the outside of the pressure-inducing tube (5), and the air injection valve (30) is located between the piston (14) and the measuring meter (6).

8. The low-temperature gas-liquid two-phase flow level metering device according to claim 3, characterized in that: A round box (31) is fixedly installed at the bottom of the mounting tube (4), two sleeve blocks (32) are fixedly installed on the outer side of the rotating rod (16) located at the bottom of the sealing disk (8), two fixed blocks (33) are fixedly installed on the inner side of the round box (31), a slip ring (34) is fixedly installed between the two fixed blocks (33), the sleeve block (32) is slidably installed on the outer side of the slip ring (34), and two arc springs (35) are provided on the outer side of the slip ring (34), and the arc springs (35) are fixedly installed between the sleeve block (32) and the fixed block (33).

9. The low-temperature gas-liquid two-phase flow level metering device according to claim 3, characterized in that: The sleeve (23) is butted against the mounting socket (3) via bolts.

10. The low-temperature gas-liquid two-phase flow level metering device according to claim 4, characterized in that: A water-absorbing cotton block (36) is provided on the inner side of the water storage box (26).

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