A quick liquid filling device and method for a hydrostatic level system

Abstract

The application discloses a kind of quick liquid filling device and liquid filling method for static level system, and relates to a kind of static level liquid filling device.It can be filled with freeze-proof liquid to entire static level observation system efficiently and quickly without generating air bubble.The static level system includes liquid storage liquid tank with liquid tank upper sealing cover on top, PU liquid inlet pipe connected with the outlet of the bottom of liquid storage liquid tank and several static level sensors in series in PU liquid inlet pipe;freeze-proof liquid tank provides freeze-proof liquid for static level system;The quick liquid filling device includes vacuum pump, speed regulation circuit board and lithium battery connected with each other, the speed regulation circuit board is powered by lithium battery for vacuum pump, and the speed of the vacuum pump is controlled by the speed regulation circuit board.The application has the advantages of self-power supply, high liquid filling efficiency, low labor intensity, controllable and adjustable pressure during liquid filling process, and can perform system air tightness pre-checking.

Description

Technical Field

[0001] The invention relates to a static level liquid filling device, in particular to a novel device suitable for leak detection and rapid liquid filling of the entire system pipeline of the static level and an implementation method thereof. Background Art

[0002] A static level is a precision instrument for measuring elevation differences and their changes. In actual use, multiple static levels are connected by liquid tubes. Based on the working principle of "communicating vessels", the liquid in the liquid tubes will eventually remain at the same horizontal plane under the action of atmospheric pressure and gravity. By measuring the liquid level change or relative pressure difference at each point, the relative change in elevation between the measuring points can be obtained, that is, the relative settlement change of the structure to be measured can be obtained.

[0003] The liquid connecting the various measuring points in a static level system has a significant impact on its test results. To prevent low-temperature frost heave from damaging test components, current static level settlement monitoring systems typically use colored antifreeze as the filling medium. Common filling methods include manually pouring the liquid from the head end or pressurized pumping. However, if the test line is too long and the measuring points are not completely straight or distributed at the same elevation, the manual pouring method faces shortcomings such as low efficiency and high labor intensity. Similarly, although pressurized pumping can significantly improve filling efficiency, there is a risk of damaging test components due to the uncontrollable pumping pressure. In addition, gases easily dissolve in liquids at high pressures and gradually precipitate when the pressure decreases, leading to the formation of bubbles. However, when the temperature changes, the volume of bubbles relative to the liquid changes greatly, resulting in liquid level errors and ultimately distorted measurements. On the other hand, all current filling methods are based on the premise that the entire system is leak-free. However, in reality, the static level test system is composed of several test components, PU connecting pipes, and various quick-connect plugs. Due to the influence of assembly quality, it is difficult to ensure that the entire pipeline is leak-free. If a leak occurs after filling, remediation will not only affect the integrity of the data, but also cause great losses in manpower, material and financial resources.

[0004] Therefore, how to efficiently and quickly fill the entire static level observation system with antifreeze without generating bubbles, and be able to test the air tightness of the system before filling, and make the pressure controllable and adjustable during the entire filling process, are difficult problems that urgently need to be solved in the current static level filling equipment and technology. Summary of the Invention

[0005] In response to the above problems, the present invention proposes a rapid liquid filling device and liquid filling method for a static level system, which can efficiently and quickly fill the entire static level observation system with antifreeze liquid without generating bubbles, and can also test the air tightness of the system before filling, so that the pressure can be controlled and adjusted during the entire filling process.

[0006] The technical solution of the present invention is as follows: the static level system comprises a liquid storage tank 8 with a liquid tank upper sealing cover 9 on the top, a PU liquid inlet pipe 2 connected to the bottom outlet of the liquid storage tank 8, and a plurality of static level sensors 1 connected in series in the PU liquid inlet pipe 2;

[0007] Antifreeze is provided to the static level system through the antifreeze barrel 10;

[0008] The rapid liquid filling device 3 includes a vacuum pump 4, a speed control circuit board 5 and a lithium battery 6 that are interconnected. The vacuum pump 4 and the speed control circuit board 5 are powered by the lithium battery 6, and the speed of the vacuum pump 4 is controlled by the speed control circuit board 5. The speed control circuit board belongs to the existing technology, and its principle is consistent with that of a traditional electric fan controller. By changing the resistance value of the series resistor in the circuit, the power supply current of the vacuum pump is changed to achieve the adjustment of the speed of the vacuum pump.

[0009] When filling the liquid, the end of the PU liquid inlet pipe 2 is connected to the inlet of the vacuum pump 4, and the outlet of the vacuum pump 4 is connected to the antifreeze liquid barrel 10 through the PU liquid return pipe 7. A liquid extraction pipe, a negative pressure gauge 12 and a total liquid inlet pipe are connected in sequence between the antifreeze liquid barrel 10 and the liquid storage tank 8, and the total liquid inlet pipe is made to pass through the sealing cover 9 on the liquid tank.

[0010] Furthermore, the end of the PU liquid inlet pipe 2 is connected to the inlet of the vacuum pump 4 through a quick-insert straight-through angle valve 14.

[0011] One side of the negative pressure gauge 12 is connected to the liquid extraction pipe through a straight-through angle valve 11 , and the other side is connected to the main liquid inlet pipe through a straight-through quick-connect connector 13 .

[0012] One end of the liquid extraction pipe extends into the bottom of the antifreeze liquid barrel 10 .

[0013] Follow these steps to fill the tank:

[0014] S1, complete the connection of the antifreeze liquid barrel 10, the negative pressure gauge 12, the static level system and the rapid liquid filling device 3 and the arrangement of the pipelines between them;

[0015] S2. Close the straight-through angle valve 11 and open the quick-insert straight-through angle valve 14. Turn the switch of the speed control circuit board 5 to start the vacuum pump 4. Observe the value of the negative pressure gauge 12 and gradually increase the switch of the speed control circuit board 5 to ensure that the suction negative pressure value does not exceed 2 / 3 of the full scale of the static level sensor 1. Then, close the quick-insert straight-through angle valve 14 and turn off the vacuum pump 4.

[0016] S3. Record the initial value of the negative pressure gauge 12 reading during step S2, and then read and record the negative pressure gauge 12 readings after 5 minutes, 10 minutes, 30 minutes, and 60 minutes. If the negative pressure gauge 12 can always ensure stability, it means that the airtight assembly of the entire static level test system is qualified, and the next step of filling can be carried out;

[0017] On the contrary, during the entire process of the air tightness test of the static level test system, if the reading of the negative pressure gauge 12 cannot remain stable, it means that there is a problem with the air tightness of the system. At this time, the system leakage point can be found in turn by disassembling the system and remedying it before filling the system with liquid.

[0018] S4. After the air tightness of the entire static level test system is confirmed to be qualified, open the quick-insert straight-through angle valve 14 and the straight-through angle valve 11 in sequence, and ensure that the PU return pipe 7 and the liquid extraction pipe in the antifreeze barrel 10 are submerged below the liquid level. Then, turn the switch of the speed control circuit board 5 to start the vacuum pump 4 for negative pressure liquid suction. At the same time, pay attention to the value of the negative pressure gauge 12 and gradually increase the switch of the speed control circuit board 5 to ensure that the suction negative pressure value does not exceed 2 / 3 of the full scale of the static level sensor 1; in this way, about 2 / 3 of the full scale can reflect the best test performance of a sensor and is also a protective measure for the equipment;

[0019] S5. Under the negative pressure of the vacuum pump 4, the antifreeze in the antifreeze barrel 10 will fill the liquid storage tank 8, each static level sensor 1 and all connected PU liquid inlet pipes 2 in sequence. The air in the pipeline and the antifreeze mixed with air at the beginning of the filling will continuously return to the antifreeze barrel 10 through the PU return pipe 7.

[0020] S6. During the continuous pumping and circulation process of the vacuum pump, carefully observe that there are no bubbles in the entire static level test system pipeline, then close the quick-connect angle valve 14 and the vacuum pump 4 in sequence to separate the filling device 3 from the static level test system; at the same time, unplug the straight-through quick-connect connector 13 and the main liquid inlet pipe, and separate the negative pressure gauge 12 and the antifreeze liquid barrel 10 from the static level test system.

[0021] S7, unscrew the sealing cap 9 on the liquid tank and pour an appropriate amount of silicone oil to the liquid level in the liquid storage tank 8, then cover the sealing cap 9 on the liquid tank tightly, while ensuring that the silicone oil level is connected to the atmosphere;

[0022] S8. After completing the filling and leak detection work of the static level test system and protecting the system pipelines, start the automatic monitoring of relative settlement.

[0023] The beneficial effects of the present invention are:

[0024] 1. Compared with existing technologies and devices, the present invention has the advantages of self-power supply, high filling efficiency, low labor intensity, controllable and adjustable pressure during filling, and the ability to perform system air tightness pre-check.

[0025] 2. Unlike pump pressure technology which easily presses a large number of bubbles into the pipeline, the present invention adopts the idea of ​​negative pressure suction to fill the liquid, which can evacuate the air in the pipeline, thereby achieving bubble-free pipeline and improving the quality of sedimentation observation results.

[0026] 3. The liquid filling device is easy to manufacture and connects to the static level system via a quick-connect connector, making it quick, simple, and convenient. Furthermore, the device itself is highly integrated and can be reused multiple times, saving costs.

[0027] Fourth, the use of the speed regulating circuit board enables the liquid filling device to be applicable to static level sensors of different ranges, and has the stable performance of fast and efficient liquid filling and real-time pressure measurement and controllable pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of this case;

[0029] In the figure, 1-static level sensor; 2-PU liquid inlet pipe; 3-fast liquid filling device; 4-vacuum pump; 5-speed control circuit board; 6-lithium battery; 7-PU liquid return pipe; 8-liquid storage tank; 9-liquid tank upper sealing cover; 10-antifreeze liquid barrel; 11-straight-through angle valve; 12-negative pressure gauge; 13-straight-through quick-connect connector; 14-quick-connect straight-through angle valve. DETAILED DESCRIPTION

[0030] In order to clearly illustrate the technical features of this patent, this patent is described in detail below through specific implementation methods and in combination with its accompanying drawings.

[0031] The present invention Figure 1 As shown, the rapid liquid filling device 3 includes a three-part combination of a vacuum pump 4, a speed control circuit board 5 and a lithium battery 6, as well as a negative pressure gauge 12, various quick-connect connectors and PU tubes, etc., wherein the three-part combination of the vacuum pump 4, the speed control circuit board 5 and the lithium battery 6 is enclosed in a box.

[0032] The static level system includes a liquid storage tank 8 with a liquid tank upper sealing cover 9 on the top, a PU liquid inlet pipe 2 connected to the bottom outlet of the liquid storage tank 8, and several static level sensors 1 connected in series in the PU liquid inlet pipe 2. The other end of the PU liquid inlet pipe 2 is connected to the inlet of the vacuum pump 4 through a quick-insert straight-through angle valve 14.

[0033] The outlet of the vacuum pump 4 is connected to the antifreeze barrel 10 through the PU return pipe 7. The antifreeze barrel 10 is provided with a liquid extraction pipe. One end of the liquid extraction pipe extends into the bottom of the antifreeze barrel 10, and the other end is connected to the negative pressure gauge 12 through the straight-through angle valve 11. The negative pressure gauge 12 is also connected to the main liquid inlet pipe through the straight-through quick-plug connector 13. The main liquid inlet pipe passes through the sealing cover 9 on the liquid tank, that is, the negative pressure gauge 12 is installed between the liquid storage tank 8 and the antifreeze barrel 10.

[0034] After the static level quick filling device is connected with the static level sensor, the system is as follows Figure 1 As shown, after the negative pressure gauge 12 and the rapid liquid filling device are connected to the head and the end of the static level observation system in sequence, the system pipeline is first tested for air tightness. After there are no leaks, vacuum is drawn to perform negative pressure liquid absorption. During the filling process, the speed control circuit board is used to control the pressure value of the negative pressure gauge in real time to ensure that the filling pressure is within the range of the static level sensor.

[0035] When used specifically:

[0036] S1, complete the connection of the antifreeze liquid barrel 10, the negative pressure gauge 12, the static level system and the rapid liquid filling device 3 and the arrangement of the pipelines between them;

[0037] According to the settlement monitoring needs of the structure to be measured, the PU liquid inlet pipe 2 can be used to connect each static level sensor 1 and the liquid storage tank 8 in sequence, and strive to ensure that each joint is firmly connected without leakage.

[0038] Tighten the sealing cover 9 on the liquid tank to the liquid storage tank 8, and connect it to the negative pressure gauge 12 through the straight-through quick-plug connector 13. The other end of the negative pressure gauge 12 is connected to a short section of PU pipe through the straight-through angle valve 11 and then penetrates below the liquid level in the antifreeze barrel.

[0039] The inlet of the quick filling device 3 is connected to the PU liquid inlet pipe of the end sensor of the static level test system through the quick-connect straight-through angle valve 14. Similarly, its outlet is connected to the PU liquid return pipe 7, and the end of the PU liquid return pipe 7 is also extended below the liquid level in the antifreeze barrel.

[0040] S2. Close the straight-through angle valve 11 and open the quick-insert straight-through angle valve 14. Turn the switch of the speed control circuit board 5 to start the vacuum pump 4. Observe the value of the negative pressure gauge 12 and gradually increase the switch of the speed control circuit board 5 to ensure that the suction negative pressure value does not exceed 2 / 3 of the full scale of the static level sensor 1. Then, close the quick-insert straight-through angle valve 14 and turn off the vacuum pump 4.

[0041] S3. Record the initial value of the negative pressure gauge 12 reading during step S2, and then read and record the negative pressure gauge 12 readings after 5 minutes, 10 minutes, 30 minutes, and 60 minutes. If the negative pressure gauge 12 can always ensure stability, it means that the airtight assembly of the entire static level test system is qualified, and the next step of filling can be carried out;

[0042] Conversely, in the whole static level test system air tightness inspection process, if the negative pressure gauge 12 value can not be kept stable, it shows that the system air tightness has problems, at this time, the half can be used to find out the system leak point and remedy before filling.

[0043] S4, when the whole static level test system air tightness is confirmed to be qualified, the quick plug straight through angle valve 14 and the straight through angle valve 11 are opened in turn, and the PU return liquid pipe 7 in the anti-freezing liquid barrel 10 and the liquid suction pipe are ensured to be not immersed below the liquid level, the speed regulation circuit board 5 switch is twisted to open the vacuum pump 4 to carry out negative pressure liquid suction, the negative pressure gauge 12 value is observed, and the speed regulation circuit board 5 switch is gradually increased to ensure that the suction negative pressure value does not exceed 2 / 3 of the full scale of the static level sensor 1.

[0044] S5, under the action of the vacuum pump 4 negative pressure suction, the anti-freezing liquid in the anti-freezing liquid barrel 10 will fill the liquid storage tank 8 and each static level sensor 1 and all connection PU liquid inlet pipes 2 in turn, and the air in the pipeline and the anti-freezing liquid mixed with air at the beginning of liquid filling will return to the anti-freezing liquid barrel 10 through the PU return liquid pipe 7.

[0045] S6, in the process of continuous vacuum pump liquid suction circulation, after carefully observing that the whole static level test system pipeline has no air bubbles, the quick plug straight through angle valve 14 and the vacuum pump 4 are closed in turn, the liquid filling device 3 is separated from the static level test system. At the same time, the straight through quick plug connector 13 and the total liquid inlet pipe are removed, and the negative pressure gauge 12 and the anti-freezing liquid barrel 10 are separated from the static level test system.

[0046] S7, the liquid tank upper sealing cover 9 is twisted open and an appropriate amount of silicon oil is poured into the liquid surface in the liquid storage tank 8 to realize the anti-evaporation oil seal, and the liquid tank upper sealing cover 9 is tightly covered again, and the silicon oil liquid surface is ensured to be connected with the atmosphere.

[0047] S8, after completing the liquid filling and leak detection of the static level test system and protecting the system pipeline, the relative settlement automatic monitoring is started.

[0048] The specific implementation approach of the present application is many, the above description is only the preferred embodiment of the present application, it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements can be made, these improvements should also be considered as the protection scope of the present application.

Claims

1. A method for filling a static level system based on a fast filling device, the static level system comprising a liquid storage tank (8) with a liquid tank upper sealing cover (9) on the top, a PU liquid inlet pipe (2) connected to the bottom outlet of the liquid storage tank (8), and a plurality of static level sensors (1) connected in series in the PU liquid inlet pipe (2); characterized in that: Supplying antifreeze to the static level system via an antifreeze barrel (10); The rapid liquid filling device (3) comprises a vacuum pump (4), a speed regulating circuit board (5), and a lithium battery (6) which are connected to each other. The lithium battery (6) supplies power to the vacuum pump (4) and the speed regulating circuit board (5), and the speed regulating circuit board (5) controls the rotation speed of the vacuum pump (4). When filling the liquid, the end of the PU liquid inlet pipe (2) is connected to the inlet of the vacuum pump (4), and the outlet of the vacuum pump (4) is connected to the antifreeze liquid barrel (10) through the PU liquid return pipe (7). A liquid extraction pipe, a negative pressure gauge (12) and a total liquid inlet pipe are sequentially connected between the antifreeze liquid barrel (10) and the liquid storage tank (8), and the total liquid inlet pipe is made to pass through the sealing cover (9) on the liquid tank. The end of the PU liquid inlet pipe (2) is connected to the inlet of the vacuum pump (4) via a quick-insert straight-through angle valve (14); One side of the negative pressure gauge (12) is connected to the liquid extraction pipe via a straight-through angle valve (11), and the other side is connected to the main liquid inlet pipe via a straight-through quick-connect connector (13); Follow these steps to fill the tank: S1, completing the connection of the antifreeze liquid barrel (10), the negative pressure gauge (12), the static level system and the rapid liquid filling device (3) and the arrangement of the pipes therebetween; S2. Close the straight-through angle valve (11), open the quick-insert straight-through angle valve (14), turn the speed control circuit board (5) switch to start the vacuum pump (4), observe the value of the negative pressure gauge (12), and gradually increase the speed control circuit board (5) switch to ensure that the suction negative pressure value does not exceed 2 / 3 of the full range of the static level sensor (1), then close the quick-insert straight-through angle valve (14) and turn off the vacuum pump (4); S3, record the initial value of the negative pressure gauge (12) reading during step S2, and then read and record the negative pressure gauge (12) readings in sequence after 5 minutes, 10 minutes, 30 minutes and 60 minutes. If the negative pressure gauge (12) can always ensure stability, it means that the airtight assembly of the entire static level test system is qualified, and the next step of liquid filling is carried out; On the contrary, if the negative pressure gauge (12) reading cannot remain stable during the entire process of the static level test system air tightness test, it means that there is a problem with the air tightness of the system. At this time, the system leaks can be found in sequence by disassembling the system in half and remedying them before filling the system with liquid. S4. After the air tightness of the entire static level test system is confirmed to be qualified, open the quick-insert straight-through angle valve (14) and the straight-through angle valve (11) in turn, and ensure that the PU return pipe (7) and the liquid extraction pipe in the antifreeze barrel (10) are immersed below the liquid surface, turn the speed control circuit board (5) switch to start the vacuum pump (4) for negative pressure liquid suction, and pay attention to observe the value of the negative pressure gauge (12) at the same time, and gradually increase the speed control circuit board (5) switch to ensure that the suction negative pressure value does not exceed 2 / 3 of the full range of the static level sensor (1); S5. Under the action of the negative pressure suction of the vacuum pump (4), the antifreeze in the antifreeze barrel (10) will fill the liquid storage tank (8), each static level sensor (1) and all connected PU liquid inlet pipes (2) in turn, and the air in the pipeline and the antifreeze mixed with air when the filling begins will continuously return to the antifreeze barrel (10) through the PU return pipe (7); S6. During the continuous pumping and circulation of the vacuum pump, carefully observe that there are no bubbles in the entire static level test system pipeline, then close the quick-connect angle valve (14) and the vacuum pump (4) in turn, and separate the filling device (3) from the static level test system; at the same time, unplug the straight-through quick-connect connector (13) and the main liquid inlet pipe, and separate the negative pressure gauge (12) and the antifreeze barrel (10) from the static level test system.

2. The method for filling a static level system based on a rapid liquid filling device according to claim 1, characterized in that: One end of the liquid extraction pipe extends into the bottom of the antifreeze liquid barrel (10).

3. According to the method for filling a static level system based on a rapid liquid filling device according to claim 1, after separating the negative pressure gauge (12) and the antifreeze liquid barrel (10) from the static level test system, the method further comprises the following steps: S7, unscrew the sealing cap (9) on the liquid tank and pour an appropriate amount of silicone oil to the liquid level in the liquid storage tank (8), then cover the sealing cap (9) on the liquid tank tightly, and ensure that the silicone oil level is connected to the atmosphere; S8. After completing the filling and leak detection work of the static level test system and protecting the system pipelines, start the automatic monitoring of relative settlement.

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