Liquid level meter flushing device and liquid level detection system

Abstract

The utility model provides a liquid level meter flushing device and a liquid level detection system. The liquidometer flushing device is used for flushing a liquidometer, the liquidometer comprises a first liquidometer flange, a second liquidometer flange and a liquidometer body, and the liquidometer body is installed on a liquidometer installation hole in the side face of a liquid level container through the first liquidometer flange and the second liquidometer flange; the second liquidometer flange is fixed at the top of the first liquidometer flange, and the liquidometer flushing device comprises a flushing ring arranged between the first liquidometer flange and the second liquidometer flange; the flushing fluid straight pipe is used for introducing a flushing medium; the first flushing pipe comprises a first sub-pipe and a second sub-pipe, the first sub-pipe is communicated between the flushing fluid straight pipe and the first end of the flushing ring, and the second sub-pipe is communicated between the flushing fluid straight pipe and the second end of the flushing ring; and the second flushing pipe is communicated between the flushing liquid straight pipe and the side surface of the liquidometer mounting hole. Therefore, comprehensive and efficient flushing of key parts of the liquid level meter can be achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of polycrystalline silicon, and more particularly relates to a liquid level meter flushing device and a liquid level detection system. BACKGROUND

[0002] In a high-purity polycrystalline silicon project, a double-flange liquid level meter is used to measure the liquid level meter of a quenching tower, and a three-out-of-two interlocking form is used for the liquid level meter to monitor the change of the liquid level meter of the quenching tower in real time. During production, the material in the tower kettle of the quenching tower is relatively dirty, and chlorides continuously deposit and adhere to the pressure-taking pipe and the diaphragm capsule of the double-flange liquid level meter during long-period operation, which causes the liquid level meter to be distorted and inaccurate in display, and affects the stable operation of the quenching tower. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiment of the application is to provide a liquid level meter flushing device and a liquid level detection system, and the flushing device can effectively clean the liquid level meter, thereby solving the technical problem that the liquid level meter is prone to distortion in the prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows:

[0005] A liquid level meter flushing device is provided for flushing a liquid level meter, characterized in that the liquid level meter comprises a first liquid level meter flange, a second liquid level meter flange and a liquid level meter main body, the liquid level meter main body is installed on a liquid level meter mounting hole on the side of a liquid level container through the first liquid level meter flange and the second liquid level meter flange, and the first liquid level meter flange is arranged at the top of the liquid level meter mounting hole; the second liquid level meter flange is fixed to the top of the first liquid level meter flange, and the device comprises:

[0006] A flushing ring is arranged between the first liquid level meter flange and the second liquid level meter flange.

[0007] A flushing liquid straight pipe is used to introduce a flushing medium.

[0008] A first flushing pipe comprises a first sub-pipe and a second sub-pipe, the first sub-pipe is connected between the flushing liquid straight pipe and the first end of the flushing ring, the second sub-pipe is connected between the flushing liquid straight pipe and the second end of the flushing ring, and the first end is opposite to the second end.

[0009] A second flushing pipe is connected between the flushing liquid straight pipe and the side of the liquid level meter mounting hole.

[0010] When the flushing liquid straight pipe introduces the flushing medium, the flushing medium is introduced from the flushing liquid straight pipe to the first sub-pipe and the second sub-pipe, and an annular flushing vortex is formed when the flushing medium flows through the flushing ring to flush the part between the first liquid level meter flange and the second liquid level meter mounting flange.

[0011] and the flushing medium is introduced into the second flushing pipe from the flushing liquid straight pipe to flush the interface of the liquid level gauge installation hole.

[0012] Optionally, the first end and the second end of the flushing ring are respectively provided with flushing ring holes, the first sub-pipe communicates with the flushing ring hole of the first end of the flushing ring, and the second sub-pipe communicates with the flushing ring hole of the second end of the flushing ring.

[0013] Optionally, a standard threaded hole is arranged on the flushing ring hole, and a male female joint is arranged in the standard threaded hole.

[0014] The first sub-pipe communicates with the flushing ring hole of the first end of the flushing ring through the male female joint.

[0015] The second sub-pipe communicates with the flushing ring hole of the second end of the flushing ring through the male female joint.

[0016] Optionally, the flushing ring is a circular ring, the third end and the fourth end of the flushing ring are respectively provided with flange corrugations, the third end is opposite to the fourth end, the third end of the flushing ring (2) is connected with the first liquid level gauge flange (3), and the fourth end is connected with the second liquid level gauge flange (1).

[0017] Optionally, the outer diameter of the flushing ring is smaller than the distance between two pairs of fastening bolts between the first liquid level gauge flange and the second liquid level gauge flange.

[0018] Optionally, the flushing ring is fastened to the first liquid level gauge flange and the second liquid level gauge flange through the fastening bolts.

[0019] Optionally, the liquid level gauge body includes a liquid level gauge diaphragm box, the liquid level gauge diaphragm box is connected with the second liquid level gauge flange, and the flushing medium is introduced into the first sub-pipe and the second sub-pipe from the flushing liquid straight pipe to flush the liquid level gauge diaphragm box by forming an annular flushing vortex when flowing through the flushing ring.

[0020] Optionally, flange spacers are respectively arranged between the flushing ring and the first liquid level gauge flange and between the flushing ring and the liquid level gauge diaphragm box.

[0021] Optionally, an adjusting valve is arranged on the flushing liquid straight pipe, and the adjusting valve is used to control the flow and pressure of the flushing medium.

[0022] A liquid level detection system is provided, which is characterized by being used for detecting the liquid level of a quench tower, and the liquid level detection system comprises:

[0023] a liquid level gauge body (16);

[0024] a first liquid level gauge flange (3);

[0025] The second liquid level meter flange (1), the liquid level meter body (16) is installed on the liquid level meter installation hole (9) of the quenching tower side through the first liquid level meter flange (3) and the second liquid level meter flange (1), and the liquid level meter body (16) is inside the flushing ring (2), used for measuring the liquid level of the quenching tower;

[0026] The application also provides a liquid level meter flushing device for flushing the liquid level meter body (16).

[0027] The application provides the beneficial effects that:

[0028] When the flushing liquid straight pipe is connected to the flushing medium, the medium enters the flushing ring through the first sub-pipe and the second sub-pipe, the flushing medium enters the flushing ring from two liquid inlet directions and converges in the annular structure, the flushing ring and the two liquid level meter flanges form a closed flow channel together, the flushing path is constrained in the annular area of the flushing ring, and the circulating flow is generated during the flowing process along the annular motion of the structure track of the flushing ring, so that the annular vortex is formed in the flushing ring, and the key parts between the first liquid level meter flange and the second liquid level meter flange are efficiently flushed. At the same time, part of the flushing medium flushes the interface of the liquid level meter installation hole through the second flushing pipe, so that the cleanliness and sealing of the interface are ensured. Therefore, the key parts of the liquid level meter can be comprehensively and efficiently flushed. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 The structure diagram of the liquid level meter flushing device provided by the embodiments of the application is shown.

[0031] Figure 2 The flushing ring sectional view of the liquid level meter flushing device provided by the embodiments of the application is shown.

[0032] Figure 3 The liquid level meter flushing device provided by the embodiments of the application is shown.

[0033] Figure 4 The structure diagram of the flushing ring provided by the embodiments of the application is shown.

[0034] The meanings of the marks in the figure are as follows:

[0035] 1, second level meter flange; 2, flush ring; 3, first level meter flange; 4, level meter diaphragm capsule; 5, diaphragm capsule fixing bolt; 6, first flush pipe; 6a, first sub-pipe; 6b, second sub-pipe; 7, second flush pipe; 8, flush ring hole; 9, level meter mounting hole; 10, flange gasket; 11, liquid level container; 12, revolve female joint; 13, fastening bolt; 14, flush liquid straight pipe; 15, regulating valve; 16, level meter body; 17, flange corrugation. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0037] It should be noted that the terms "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present patent. The terms "first", "second" are only for the purpose of convenience, and cannot be understood as indicating or implying relative importance or implying the number of technical features. The meaning of "a plurality of" is two or more, unless otherwise specifically limited. In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] It should also be noted that unless otherwise specified and limited, the terms "set", "mount", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the high-purity polysilicon project, the quench tower liquid level meter detection adopts a double-flange liquid level meter measurement, and the liquid level meter adopts a two-out-of-three interlocking form to monitor the changes of the quench tower liquid level meter in real time. During production, the material in the quench tower kettle is relatively dirty, and chlorides continuously deposit and adhere to the pressure-tapping pipe and the diaphragm capsule of the double-flange liquid level meter during long-period operation, resulting in distortion of the liquid level meter and inaccurate display. The quench tower liquid level meter is provided with high and low liquid level interlocking (two-out-of-three), and if the liquid level meter measurement is too low, it will cause the quench tower kettle pump interlocking to trip and stop, interrupt the reflux in the middle of the quench tower, and cause the temperature of the quench tower to rise. At the same time, if the kettle pump cannot operate, it will cause high-boiling substances to accumulate at the bottom of the quench tower, block the quench tower slag discharge pipeline, and affect the stable operation of the quench tower. If the liquid level measurement is too high, it will automatically close the tower top reflux regulating valve, causing high-boiling substances in the kettle to be carried to the top of the tower to block the quench tower packing, causing the pressure difference in the upper part of the quench tower to increase, and affecting the stable operation of the quench tower.

[0040] In actual application, the use of the quench tower liquid level meter of the polysilicon cold hydrogenation device was counted. In October and November 2023, the three liquid level meters of the single-line quench tower of the cold hydrogenation device were blocked and displayed abnormally more than 17 times, with an average failure rate of 2.8 times per month. Since the liquid level meter is involved in interlocking control, each disassembly and maintenance needs to cut off the interlocking, and the high temperature, high pressure, climbing and material-related operations of the equipment increase the difficulty of the work. Each time the double-flange liquid level meter is disassembled and inspected, four personnel need to work together to disassemble the upper and lower flanges of the double-flange liquid level meter, clean the deposits on the diaphragm capsule, calibrate the zero point, and then reinstall and debug the material in the pressure-tapping pipe. Four personnel need to work together to complete the disassembly and inspection of three liquid level meters in one day. The high-frequency blockage of the pressure-tapping pipe and the diaphragm capsule, the abnormal display of the liquid level meter, the operation of the process main control personnel, the increase of the probability of interlocking pump stoppage and quench tower blockage, the frequent inspection and maintenance, the increase of the work intensity of the employees, and the difficulty in controlling the safety risk make it difficult to control.

[0041] Therefore, the quench tower liquid level meter of the polysilicon cold hydrogenation device has the following technical problems: (1) the double-flange liquid level meter pressure tapping port is seriously blocked, the measurement is not accurate, and the stability is poor; (2) the double-flange liquid level meter is frequently involved in maintenance, the work intensity of the employees is high, and the danger coefficient is high; (3) the elasticity of the diaphragm capsule decreases, the diaphragm capsule hardens, and the cost of spare parts increases.

[0042] In order to illustrate the technical solutions of the present application, the following will be described in detail in combination with specific drawings and examples.

[0043] Please refer to Figure 1The embodiment of the present application provides a liquid level meter flushing device 100 for flushing a liquid level meter, the liquid level meter comprising a first liquid level meter flange 3, a second liquid level meter flange 1 and a liquid level meter body 16, the liquid level meter body 16 being installed on a liquid level meter mounting hole 9 on the side of a liquid level container 11 through the first liquid level meter flange 3 and the second liquid level meter flange 1, the first liquid level meter flange 3 being arranged at the top of the liquid level meter mounting hole 9, and the second liquid level meter flange 1 being fixed at the top of the first liquid level meter flange 1,

[0044] The liquid level meter flushing device 100 specifically comprises:

[0045] A flushing ring 2 is arranged between the first liquid level meter flange 3 and the second liquid level meter flange 1.

[0046] A flushing liquid straight pipe 14 is used for introducing a flushing medium.

[0047] A first flushing pipe 6 comprises a first sub-pipe 6a and a second sub-pipe 6b, the first sub-pipe 6a being communicated between the flushing liquid straight pipe 14 and a first end of the flushing ring 2, and the second sub-pipe 6b being communicated between the flushing liquid straight pipe 14 and a second end of the flushing ring 2, the first end and the second end being opposite.

[0048] A second flushing pipe 7 is communicated between the flushing liquid straight pipe 14 and the side of the liquid level meter mounting hole 9.

[0049] In the case that the flushing liquid straight pipe 14 introduces the flushing medium, the flushing medium is introduced from the flushing liquid straight pipe 14 into the first sub-pipe 6a and the second sub-pipe 6b, and forms a ring-shaped flushing vortex when flowing through the flushing ring 2, so as to flush the part between the first liquid level meter flange 3 and the second liquid level meter mounting flange 1.

[0050] In addition, the flushing medium is introduced from the flushing liquid straight pipe 14 into the second flushing pipe 7 to flush the interface of the liquid level meter mounting hole (9).

[0051] In the embodiment, the liquid level container 11 is a container which needs to measure the liquid level, and is provided with the liquid level meter mounting hole 9 on the side for mounting and fixing the liquid level meter. Here, the liquid level container 11 can be a quench tower.

[0052] The liquid level meter is composed of the first liquid level meter flange 3, the second liquid level meter flange 1 and the liquid level meter body 16. The liquid level meter body 16 is a core component for measuring the liquid level and is used for collecting the liquid level data.

[0053] The first liquid level meter flange 3 is arranged at the top of the liquid level meter mounting hole 9 and is used for connecting and fixing the liquid level meter body 16. The design of the first liquid level meter flange 3 and the cooperation with the container ensure the stability of the liquid level meter body 16 during operation. The liquid level meter is fixed on the side of the liquid level container 11 through the liquid level meter mounting hole 9.

[0054] Second level meter flange 1: fixed on the top of the first level meter flange 3 by fastening bolt 13, encapsulating the level meter body and serving as another fixed point. As shown in Figure 1 , a tight connection interface is formed between the second level meter flange 1 and the first level meter flange 3, ensuring the stability of the overall structure.

[0055] Flushing ring 2: installed between the first level meter flange 3 and the second level meter flange 1, forming a closed annular channel for surrounding cleaning of the gap between the level meter flanges and the level meter body 16. The flushing medium flows through the channel inside the flushing ring, forming a covering vortex cleaning for the area between the flanges.

[0056] Flushing liquid straight pipe 14: as the main liquid supply pipeline, connecting the external flushing medium source and the internal part of the device, ensuring that the flushing medium can be stably and continuously input into the system.

[0057] First flushing pipe 6: including first sub-pipe 6a and second sub-pipe 6b, respectively connecting the two side ends of the flushing liquid straight pipe 14 and the flushing ring 2, two streams of flushing medium such as water flow into the flushing ring from both ends, forming an annular vortex. The details are explained below, which cleans the area between the first level meter flange 3 and the second level meter flange 1, removing possible accumulated dirt or deposits.

[0058] Second flushing pipe 7: connecting the flushing liquid straight pipe 14 and the side of the level meter mounting hole 9, ensuring that the flushing medium can directly act on the interface of the mounting hole, preventing the accumulation and blockage of materials.

[0059] The connection relationship among the flushing ring 2, the flushing liquid straight pipe 14, and the first flushing pipe 6 is shown in Figure 3 .

[0060] The working process of the device is as follows: when the flushing liquid straight pipe 14 is connected to the flushing medium, the medium enters the flushing ring 2 from two opposite ports through the first sub-pipe 6a and the second sub-pipe 6b. Inside the flushing ring, the two streams of fluid quickly converge and flow along the annular structure, constrained by the annular pipe shape, forming an annular vortex. Specifically, the annular structure of the flushing ring restricts the flow path of the flushing medium, making it continuously move along the annular channel. The two streams of fluid introduced by the first sub-pipe 6a and the second sub-pipe 6b produce a collision inside the flushing ring. The differences in flow rate, pressure, and direction cause the fluids to cut and disturb each other, ultimately forming a vortex. The vortex realizes a wide range of turbulent effects in the flushing ring, which can comprehensively cover the area between the first level meter flange 3 and the second level meter flange 1, removing the attached dirt or deposits without dead angles. At the same time, part of the flushing medium flushes the interface of the level meter mounting hole 9 through the second flushing pipe 7, ensuring the cleanliness and sealing of the interface, preventing dirt from accumulating in the interface area and affecting the tightness of the flange, and avoiding system leakage or damage to the level meter function due to the blockage of the orifice.

[0061] In this embodiment, through the double-channel design, the device can realize comprehensive and efficient flushing of the key parts of the liquid level meter. The formation of the annular vortex enhances the flushing effect, which can effectively prevent the deposition and scaling of materials between the liquid level meter flanges. Not only does it improve the measurement accuracy and reliability of the liquid level meter, but also prolongs the service life of the equipment and reduces the maintenance frequency and cost caused by scaling.

[0062] Optionally, the first end and the second end of the flushing ring 2 are respectively provided with flushing ring holes 8, and the first sub-pipe 6a and the second sub-pipe 6b are in communication with the flushing ring holes 8 of the first end and the second end of the flushing ring 2 respectively.

[0063] Specifically, as shown in Figure 1 and Figure 2 , the first end and the second end of the flushing ring 2 are respectively provided with flushing ring holes 8. The first sub-pipe 6a and the second sub-pipe 6b are in communication with the flushing ring holes 8 of the first end and the second end of the flushing ring 2 respectively. In this way, the flushing medium can enter the flushing ring from two directions at the same time, ensuring uniform distribution and sufficient flushing of the flushing medium.

[0064] In this embodiment, by providing flushing ring holes 8 on both sides of the flushing ring 2, bidirectional input of the flushing medium is realized. The bidirectional input design effectively reduces the dead angle of the flushing medium during flow, improving the overall flushing efficiency.

[0065] Optionally, as shown in Figure 2 and Figure 4 , a standard threaded hole is provided in the flushing ring hole 8, and a male joint 12 is provided on the standard threaded hole,

[0066] The first sub-pipe 6a is in communication with the flushing ring hole 8 of the first end of the flushing ring 2 through the male joint 12;

[0067] The second sub-pipe 6b is in communication with the flushing ring hole 8 of the second end of the flushing ring 2 through the male joint 12.

[0068] Specifically, the combination of the standard threaded hole and the male joint 12 makes the connection of the flushing pipeline more firm and sealed. The standardized interface design not only facilitates production and installation, reduces manufacturing cost and time, but also improves the universality and compatibility of the device. Through the application of the standard threaded hole, the reliability of the connection is ensured, preventing leakage problems caused by non-standard connection, further improving the overall reliability and service life of the device.

[0069] Optionally, the flushing ring 2 is a circular ring, the third end and the fourth end of the flushing ring 2 are respectively provided with flange corrugations 17, the third end and the fourth end are opposite, the third end of the flushing ring 2 is connected with the first liquid level meter flange 3, and the fourth end is connected with the second liquid level meter flange 1.

[0070] Specifically, the flushing medium flows within the annular channel of the flushing ring 2, creating a surrounding flushing effect around the entire level gauge body and its surrounding area. Flushing ring holes 8 are provided at two opposite positions at the first and second ends of the flushing ring, respectively, for connecting the first sub-pipe 6a and the second sub-pipe 6b of the flushing medium delivery pipeline. The third and fourth ends of the flushing ring 2 are connected to the first level gauge flange 3 and the second level gauge flange 1, respectively. The flange corrugations 17 optimize the connection between the flushing ring and the level gauge flange, improving connection stability, sealing performance, and durability.

[0071] like Figure 4 The flange corrugations 17 shown enhance the mechanical strength of the flushing ring and improve its sealing performance with the level gauge flange. Through multiple contact surfaces, the flange corrugations 17 ensure the stability and sealing of the flushing ring under high-pressure flushing media.

[0072] In this embodiment, the flange corrugation significantly improves the sealing performance between the flushing ring and the level gauge flange, effectively preventing leakage of the flushing medium. This not only enhances the system's sealing performance but also improves the overall structure's pressure resistance, ensuring safe operation of the system under high-pressure conditions. By strengthening the sealing performance, the efficiency and stability of the flushing process are guaranteed.

[0073] Optionally, the outer diameter of the flushing ring 2 is smaller than the distance between the two diagonal fastening bolts 13 between the first level gauge flange 3 and the second level gauge mounting flange 1.

[0074] Specifically, the design of the outer diameter of the flushing ring 2 ensures that the flushing ring can be easily installed between flanges without being restricted by the position of the fastening bolts, thus avoiding interference and conflict during the installation process.

[0075] In this embodiment, by controlling the outer diameter of the flushing ring 2 to be smaller than the spacing between the fastening bolts 13, the convenience and flexibility of the flushing ring 2 during installation are ensured.

[0076] In addition, a reasonable outer diameter design can ensure the uniform distribution of the flushing medium within the flushing ring, thereby improving the flushing effect.

[0077] Optionally, the flushing ring 2 is fastened between the first level gauge flange 3 and the second level gauge flange 1 by fastening bolts 13.

[0078] Specifically, the flushing ring 2 is fixed using the existing fastening bolts 13, which simplifies the installation process, avoids the use of additional fixing parts, and reduces manufacturing and maintenance costs.

[0079] Optionally, the level gauge body 16 includes a level gauge diaphragm 4, which is connected to the second level gauge flange 1. The flushing medium is introduced from the flushing liquid straight pipe 14 into the first sub-pipe 6a and the second sub-pipe 6b, and forms an annular flushing vortex to flush the level gauge diaphragm 4 when flowing through the flushing ring 2.

[0080] like Figure 2 As shown, the level gauge diaphragm 4 is fastened to the second level gauge flange 1 by diaphragm fixing bolts 5. The diaphragm fixing bolts 5 reliably fix the level gauge diaphragm 4, ensuring the stability and accuracy of the level gauge during operation. The accurate positioning of the level gauge diaphragm 4 prevents displacement of the level gauge under vibration or media impact, avoiding measurement errors.

[0081] The liquid level gauge body 16 is the core component of the liquid level gauge. Its structure is used to sense the liquid level in the container, and the core includes the liquid level gauge diaphragm box 4.

[0082] The level gauge diaphragm 4 is used to sense the pressure difference from the liquid. The diaphragm senses the pressure changes of the measured liquid level in the container and transmits these pressure signals to external devices such as differential pressure transmitters. The second level gauge flange 1 fixes the level gauge diaphragm 4 to the level gauge mounting position, while also providing support and mechanical protection for the diaphragm. The level gauge diaphragm 4 is exposed to the fluid environment in direct contact with the medium, and its surface may accumulate impurities or scale, especially in corrosive or high-temperature and high-pressure environments, where the attached dirt directly affects the accuracy and reliability of the measurement. The flushing medium inside the flushing ring 2 generates a vortex effect through the meeting of two opposing liquid flows and the structural constraint of the annular shape. This vortex effect not only cleans the dirt on the front of the level gauge diaphragm 4 but also cleans the back, sides, and other hard-to-clean areas, achieving efficient flushing from all directions and angles.

[0083] Optionally, flange gaskets 10 are respectively provided between the flushing ring 2 and the first level gauge flange 3 and between the flushing ring 2 and the level gauge diaphragm box 4.

[0084] Specifically, the flange gasket 10 is made of a high-sealing material, which can effectively fill the tiny gaps at the interface and ensure the seal during the flushing process.

[0085] The application of flange gasket 10 greatly enhances the sealing effect between flushing ring 2 and the level gauge flange and diaphragm. The gasket's sealing action prevents leakage of both the flushing medium and the measured medium at the interface, ensuring system safety and environmental friendliness. The high-efficiency sealing performance not only improves the stability of the flushing process but also reduces energy waste and environmental pollution risks caused by media leakage, ensuring reliable operation of the device under various working conditions.

[0086] Optionally, a regulating valve 15 is provided on the flushing fluid straight pipe 14, which is used to control the flow rate and pressure of the flushing medium.

[0087] Specifically, the regulating valve 15 is used to accurately control the flow and pressure of the flushing medium, and the position of the valve can be adjusted according to actual needs to achieve the best flushing effect.

[0088] In this embodiment, the regulating valve 15 is set to accurately control the flow and pressure of the flushing medium, and the flushing parameters can be adjusted according to different working conditions and needs to optimize the flushing effect. The adjustable flow and pressure not only improve the flexibility and adaptability of flushing, but also save resources and avoid the problems of waste or incomplete flushing caused by excessive or insufficient medium use. In addition, the reliable control of the regulating valve ensures the stability and efficiency of the system under various operating conditions, prolonging the service life of the equipment.

[0089] The specific selection, temperature and pressure range of the flushing medium need to be determined according to the actual working conditions, such as the working environment of the liquid level meter in the quench tower or other industrial scenes.

[0090] The flushing medium generally needs to meet the following main requirements: 1. It can effectively remove dirt, scale and impurities from the liquid level meter diaphragm chamber and flange connection parts; 2. It needs to have good chemical compatibility between the flushing liquid and the liquid level meter material to avoid corrosion of the liquid level meter diaphragm, flange and flushing pipeline, etc. 3. The physical properties are suitable, the viscosity of the liquid or gas should be moderate, so as to have good flowability, can form vortex and effectively flush the target surface; 4. The properties of the flushing medium need to match the actual working conditions, such as whether it needs to be explosion-proof, corrosion-resistant, high-temperature or low-temperature, to avoid additional risks.

[0091] In some embodiments, the flushing medium can be water, chemical cleaning liquid, compressed air / inert gas or special cooling or cleaning liquid, etc.

[0092] The temperature of the flushing medium depends on the allowable temperature range of the equipment and the actual working conditions of the flushing target.

[0093] For example: normal working conditions: normal temperature 10℃-50℃ is the most common flushing liquid temperature, suitable for most water-based flushing liquid operations. High temperature environment such as quench tower flushing: if the flushing device is used in a high temperature quench tower environment, a flushing liquid that can withstand higher environmental temperature can be selected, such as a temperature range of 40℃-120℃. Low temperature environment: in extremely low temperature working environment such as cold regions or freezing process, the flushing liquid temperature can be -20°C to room temperature, using anti-freezing liquid type cleaning liquid such as ethylene glycol.

[0094] The pressure range of the flushing liquid should be designed according to the requirements of the flushing purpose to remove dirt and the pressure tolerance of the equipment. The pressure resistance performance of the liquid level meter related flange and flushing pipeline determines the upper limit of the flushing pressure. For example, the design pressure value of the flange and flushing device in a general industrial liquid level meter system is 0.3MPa-2MPa, which ensures safe use.

[0095] Specifically, the medium pressure in the flushing pipeline 14 is not less than 0.3 MPa, which ensures that the kinetic energy of the flushing medium during the flushing process is sufficient to achieve effective flushing effect and prevent the deposition and blockage of the material. The higher medium pressure not only improves the thoroughness of flushing, but also speeds up the flushing speed, reduces the flushing time, and improves the work efficiency.

[0096] Optionally, the liquid level meter flushing device can further comprise:

[0097] A distributed control system (DCS) for monitoring the operation trend, process requirements and field conditions of the liquid level meter, and communicating with the flushing system to realize automatic control.

[0098] The distributed control system (DCS) is in communication with the PID controller. When the parameters monitored by the DCS system meet the preset flushing conditions, such as abnormal fluctuations of the liquid level meter or reaching the high and low alarm limits, the PID controller automatically starts the flushing program and outputs a control signal based on the deviation value to adjust the opening of the regulating valve 15, so as to realize precise control of the flushing process.

[0099] After the completion of the flushing process, the PID controller automatically resets the regulating valve 15 according to the preset logic, preparing for the next flushing operation, so as to realize continuous automatic operation of the flushing system.

[0100] In one example, the liquid level meter flushing device provided by the present application can be realized by both hardware and software.

[0101] 1. Hardware aspect: A flushing ring is installed under the flange membrane box of the double-flange liquid level meter in the quenching tower. 1 / 2 NPT threaded sealing terminal connectors are installed on the upper and lower sides of the flushing ring for easy disassembly for later inspection and maintenance. A copper gasket is installed in the middle of the terminal connector, and sealing structural glue is applied to the threaded part to reduce the risk of leakage. At the same time, a tee joint is welded at the opening of the flushing liquid pipeline, and two routes of flushing liquid are led to the lower flange membrane box of the double-flange liquid level meter using DN15 stainless steel pipes. The pressure lead pipe and the sealing terminal connector are connected by welding, and the short pipe flushing pipeline is flushed synchronously to flush the attached material, realizing double-channel flushing.

[0102] The two routes of flushing material enter the double-flange liquid level meter flushing ring, and a vortex flow is formed on the surface of the liquid level meter membrane box to clean the membrane box. The flushing ring mainly cleans the material on the liquid level meter membrane box and the position that cannot be flushed by the short pipe flushing pipeline. The short pipe flushing hole mainly flushes the material attached to the pressure tapping pipe port and the root ball valve of the quenching tower, forming double-channel flushing and segmented flushing.

[0103] 2. Software: According to the running trend of the liquid level meter in the DCS system, process requirements and site conditions, an automatic flushing system including a PID controller, a flushing valve, a double-flange liquid level meter, etc. is designed. When the parameters monitored by the DCS system meet the preset flushing conditions, such as abnormal fluctuation of the liquid level meter or reaching the high and low alarm limits, the PID controller automatically starts the flushing program. According to the deviation value, the PID controller outputs a control signal to adjust the opening of the flushing valve, so as to realize accurate control of the flushing process. After flushing is completed, the PID controller automatically resets the valve according to the preset logic, preparing for the next flushing.

[0104] In specific use, according to the running trend of the liquid level meter in the DCS system, when the liquid level meter appears abnormal fluctuation, the PID automatically controls the regulating valve 15, the medium passes through the flushing pipeline 14 to the second flushing pipe 6, and the liquid level meter diaphragm chamber 4 is flushed, until the liquid level meter display returns to normal. The flushing time of each time is recorded, the stable operation period is recorded, the flushing frequency of the pressure taking pipeline and the diaphragm chamber is determined, the valve adjustment time and opening are determined, the corresponding process operation card is formulated, the flushing standard is standardized, the operation level of the on-site main operator is improved through theoretical training and on-site operation, so as to improve the measurement accuracy and stability of the instrument and protect the safety of the maintenance personnel.

[0105] In the embodiment of the present application, when the DCS system monitors that the parameters of the on-site double-flange liquid level meter meet the preset flushing conditions, such as abnormal fluctuation of the liquid level meter or reaching the high and low alarm limits, the PID controller automatically starts the flushing program. The control regulating valve adjusts the opening of the flushing valve, so that the flushing material enters from the upper and lower two paths of the flushing ring of the double-flange liquid level meter, and a vortex flow is formed on the surface of the diaphragm chamber, so as to clean the diaphragm chamber. The flushing ring mainly cleans the material on the diaphragm chamber of the liquid level meter and the position that cannot be flushed by the short pipe flushing pipeline. The short pipe flushing hole mainly flushes the material attachments in the pressure taking pipe port and the root ball valve of the quenching tower, forming double-channel flushing and segmented flushing. The cleaning and maintenance can be realized without disassembling the flange diaphragm chamber, and the effect is better.

[0106] Referring to Figure 1 and Figure 2 , the embodiment of the present application also provides a liquid level detection system for detecting the liquid level of the quenching tower.

[0107] The liquid level detection system specifically comprises:

[0108] a liquid level meter body 16;

[0109] a first liquid level meter flange 3;

[0110] a second liquid level meter flange 1, the liquid level meter body 16 is installed on the liquid level meter installation hole 9 of the side surface of the quenching tower through the first liquid level meter flange 3 and the second liquid level meter flange 1, and the liquid level meter body 16 is located inside the flushing ring 2 and is used for measuring the liquid level of the quenching tower.

[0111] The liquid level gauge flushing device according to any one of the above embodiments is used to flush the liquid level gauge body 16.

[0112] In this embodiment, the liquid level gauge body 16 is located inside the flushing ring 2, used to measure the liquid level and provide relevant signal output.

[0113] The first liquid level gauge flange 3 is installed at the top of the liquid level gauge mounting hole, serving as a connection between the liquid level gauge body 16 and the quench tower, and fixing the liquid level gauge body 16 and the flushing ring 2.

[0114] The second liquid level gauge flange 1 is used to enhance the sealing and stability of the flange, and fix the flushing ring 2.

[0115] The first and second liquid level gauge flanges are fixed by the fastening bolt 13, ensuring a tight connection between them and preventing leakage.

[0116] The flushing liquid straight pipe 14 is used to introduce the flushing medium, and its design ensures that the flushing medium can effectively flow into the flushing ring and other related parts.

[0117] The first flushing pipe 6 includes a first sub-pipe 6a and a second sub-pipe 6b, and the design of the two sub-pipes ensures that the flushing medium can be diverted from the flushing liquid straight pipe to both sides of the flushing ring, forming a uniform flushing effect.

[0118] The second flushing pipe 7 connects the flushing liquid straight pipe and the side of the liquid level gauge mounting hole, and its main function is to clean the installation interface during the flushing process to prevent impurities from accumulating.

[0119] Specifically, when the flushing liquid enters through the flushing liquid straight pipe 14, the medium flows into the first sub-pipe 6a and the second sub-pipe 6b at the same time, forming a ring-shaped vortex that flows along the flushing ring 2. The formation of the vortex allows the flushing liquid to fully cover the liquid level gauge body 16 between the first flange 3 and the second flange 1, effectively cleaning it. At the same time, the flushing medium also flows from the flushing liquid straight pipe into the second flushing pipe 7, flushing the liquid level gauge mounting hole 9 interface to maintain the cleanliness of the interface and prevent dirt from affecting the accuracy of the liquid level measurement.

[0120] Optionally, the liquid level gauge body 16 includes a liquid level gauge diaphragm 4, as shown in Figure 2 The liquid level gauge diaphragm 4 is fastened to the second liquid level gauge flange 1 by the diaphragm fixing bolt 5. The reliable fixation of the liquid level gauge diaphragm 4 by the diaphragm fixing bolt 5 ensures the stability and accuracy of the liquid level gauge during operation. When the flushing liquid enters through the flushing liquid straight pipe 14, the medium flows into the first sub-pipe 6a and the second sub-pipe 6b at the same time, forming a ring-shaped vortex that strongly flushes the liquid level gauge diaphragm 4.

[0121] It should be noted that, in this document, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0122] The principles and implementations of the present application are described herein with specific examples. The above examples are only used to help understand the method of the present application and its core idea. The above is only the preferred embodiment of the present application. It should be noted that, due to the limitation of language expression, there are infinite specific structures objectively. For ordinary skilled persons in the art, without departing from the principles of the present application, some improvements, refinements or changes can be made, or the above technical features can be combined in a proper way. These improvements, refinements, changes or combinations, or without improvement, directly applying the concept and technical solution of the utility model to other occasions, should be regarded as the protection scope of the present application.

Claims

1. A liquid level gauge flushing device for flushing a liquid level gauge, characterized in that, The liquid level gauge comprises a first liquid level gauge flange (3), a second liquid level gauge flange (1) and a liquid level gauge body (16), the liquid level gauge body (16) is installed on the liquid level gauge mounting hole (9) of the side of the liquid level container (11) through the first liquid level gauge flange (3) and the second liquid level gauge flange (1), the first liquid level gauge flange (3) is arranged at the top of the liquid level gauge mounting hole (9); the second liquid level gauge flange (1) is fixed at the top of the first liquid level gauge flange (3), and the device comprises: a flushing ring (2) arranged between the first liquid level gauge flange (3) and the second liquid level gauge flange (1); a flushing liquid straight pipe (14) for introducing flushing medium; a first flushing pipe (6), the first flushing pipe (6) comprises a first sub-pipe (6a) and a second sub-pipe (6b), the first sub-pipe (6a) is communicated between the flushing liquid straight pipe (14) and the first end of the flushing ring (2), the second sub-pipe (6b) is communicated between the flushing liquid straight pipe (14) and the second end of the flushing ring (2), and the first end is opposite to the second end; a second flushing pipe (7) communicated between the flushing liquid straight pipe (14) and the side of the liquid level gauge mounting hole (9); wherein, in the case that the flushing liquid straight pipe (14) introduces flushing medium, the flushing medium is introduced from the flushing liquid straight pipe (14) to the first sub-pipe (6a) and the second sub-pipe (6b), and forms a ring-shaped flushing vortex when flowing through the flushing ring (2) to flush the part between the first liquid level gauge flange (3) and the second liquid level gauge mounting flange (1), and the flushing medium is introduced from the flushing liquid straight pipe (14) to the second flushing pipe (7) to flush the interface of the liquid level gauge mounting hole (9).

2. The liquid level gauge flushing device according to claim 1, wherein: the first end and the second end of the flushing ring (2) are respectively provided with flushing ring holes (8), the first sub-pipe (6a) is communicated with the flushing ring hole (8) of the first end of the flushing ring (2), and the second sub-pipe (6b) is communicated with the flushing ring hole (8) of the second end of the flushing ring (2).

3. The liquid level gauge flushing device according to claim 2, characterized in that a standard threaded hole is arranged on the flushing ring hole (8), and a revolute female joint (12) is arranged in the standard threaded hole, the first sub-pipe (6a) is communicated with the flushing ring hole (8) of the first end of the flushing ring (2) through the revolute female joint (12); the second sub-pipe (6b) is communicated with the flushing ring hole (8) of the second end of the flushing ring (2) through the revolute female joint (12).

4. The liquid level gauge flushing device of claim 1, wherein, the flushing ring (2) is a circular ring, the third end and the fourth end of the flushing ring (2) are respectively provided with flange corrugations (17), the third end is opposite to the fourth end, the third end of the flushing ring (2) is connected with the first liquid level gauge flange (3), and the fourth end is connected with the second liquid level gauge flange (1).

5. The liquid level gauge flushing device of claim 2, wherein, the outer diameter of the flushing ring (2) is smaller than the distance between the two opposite fastening bolts (13) between the first liquid level gauge flange (3) and the second liquid level gauge mounting flange (1).

6. The liquid level gauge flushing device of claim 5, wherein, The flushing ring (2) is fastened between the first liquid level meter flange (3) and the second liquid level meter flange (1) by the fastening bolt (13).

7. The liquid level gauge flushing device of claim 5, wherein, The liquid level meter body (16) comprises a liquid level meter diaphragm box (4) connected with the second liquid level meter flange (1), and the flushing medium from the flushing liquid straight pipe (14) enters the first sub-pipe (6a) and the second sub-pipe (6b), and forms an annular flushing vortex when flowing through the flushing ring (2) to flush the liquid level meter diaphragm box (4).

8. The liquid level gauge flushing device according to claim 7, characterized in that Flange gaskets (10) are arranged between the flushing ring (2) and the first liquid level meter flange (3) and between the flushing ring (2) and the liquid level meter diaphragm box (4) respectively.

9. The liquid level gauge flushing device of claim 1, wherein, An adjusting valve (15) is arranged on the flushing liquid straight pipe (14), and the adjusting valve (15) is used for controlling the flow and pressure of the flushing medium.

10. A liquid level detection system, characterized by The liquid level detection system is used for detecting the liquid level of a quench tower, and comprises: a liquid level meter body (16); a first liquid level meter flange (3); a second liquid level meter flange (1), the liquid level meter body (16) is installed on a liquid level meter installation hole (9) on the side surface of the quench tower through the first liquid level meter flange (3) and the second liquid level meter flange (1), and the liquid level meter body (16) is inside a flushing ring (2) and is used for measuring the liquid level of the quench tower; the liquid level meter flushing device according to any one of claims 1 to 9 is used for flushing the liquid level meter body (16).

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