Wireless boiler liquid level meter

Abstract

The invention belongs to the technical field of boiler liquid level meters, and discloses a wireless boiler liquid level meter. A double-color lamp box and an electrode patch assembly are arranged on the front surface of the liquid level meter barrel; the air pipe is arranged at the top of the liquid level meter barrel and is communicated with the liquid level meter barrel; the liquid pipe is arranged at the bottom of the liquid level meter barrel and is communicated with the liquid level meter barrel; a buffering mechanism is arranged on one side of the liquid level meter barrel, a buffering channel for medium flowing is formed, an annular flow channel is formed through a buffering bin and a buffering cavity, linear motion of a medium is converted into rotary flowing through cooperation with a spiral flow deflector, and therefore the flow speed is obviously reduced. The distance between the flow deflectors is 1 / 2 of the pipe diameter, and due to the design, when the liquid level in the boiler fluctuates to cause a medium to flow into the surge bin at a high speed, the spiral flow deflectors can force the fluid to be converted from axial flow to rotational flow, part of kinetic energy is converted into rotational energy of the fluid, and the flow speed is further reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of boiler liquid level gauges, and specifically relates to a wireless boiler liquid level gauge. Background Art

[0002] The invention of the liquid level gauge can be traced back to the early days of the Industrial Revolution. At that time, the demand for liquid storage and transportation in industrial production was increasing day by day, and there was an urgent need for a tool to accurately measure the liquid height. The earliest liquid level gauges had simple designs and usually used floats or pressure sensors to detect the liquid level. With the progress of technology, the designs of liquid level gauges have been continuously optimized. Modern liquid level gauges such as radar liquid level gauges and ultrasonic liquid level gauges have the advantages of non-contact measurement, while wireless liquid level gauges have been developed in recent years. They combine wireless communication technology to achieve remote monitoring of the liquid level, bringing changes and conveniences to the field of liquid level monitoring.

[0003] There is now disclosed a boiler drum liquid level gauge with the publication number CN212565729U, which relates to the technical field of boilers. To solve the problem that various heavy metals and impurities contained in water are likely to damage the liquid level gauge during measurement, affecting the service life and measurement accuracy, a liquid level gauge is installed on one side of the boiler drum main body. A magnetic filtering mechanism is installed between the liquid level gauge and the boiler drum main body. The liquid level gauge includes a measuring cylinder and an electrode rod, and the electrode rod is located inside the measuring cylinder. An electronic compartment is provided at the lower end of the measuring cylinder. A sealing ring is provided between the electrode rod and the measuring cylinder. A metal filter screen is installed inside the magnetic filtering mechanism, and a first magnetic rod is installed on one side of the metal filter screen, and a second magnetic rod is installed on one side of the first magnetic rod.

[0004] The above device has a design that directly connects the boiler to the measurement cavity during use. However, during the operation of the boiler, the stability of the liquid level of the internal medium (including water and steam) is crucial. However, affected by various factors, the liquid surface often exhibits violent fluctuations or instantaneous impacts. Specifically, when the combustion load suddenly increases, the heat inside the boiler rapidly accumulates, the medium temperature rises sharply, and the volume expands, resulting in a rapid rise in the liquid level; conversely, when the combustion load decreases, the liquid level may rapidly drop. This change often has suddenness and unpredictability. The opening and closing of valves will directly affect the flow state of the medium. When a valve is suddenly opened, the medium flow rate increases, and the liquid level may rapidly rise; when the valve is closed, the medium flow rate decreases, and the liquid level may drop. This sudden change in flow rate will cause violent fluctuations in the liquid level. The start and stop of the pump group will also cause changes in the medium flow rate. When the pump group starts, the medium is rapidly pumped into the boiler, and the liquid level rises; when the pump group stops, the medium flow slows down or stops, and the liquid level may drop. This change will also cause violent fluctuations in the liquid level. When the liquid level shakes violently, it will affect the measurement accuracy. Therefore, it needs to be improved and optimized. Summary of the Invention

[0005] To solve the problems in the measurement of the liquid level of the boiler steam drum in the above-mentioned background technology, such as the change of the steam drum pressure, the limitation of the compensation design of the equilibrium vessel, and the sudden drop of the steam pressure, which will lead to the change of the density of saturated water and steam, the error of differential pressure output, the failure of compensation, and the malfunction of the instrument, the present invention provides a wireless boiler liquid level gauge.

[0006] To achieve the above object, the present invention provides the following technical solutions: A wireless boiler liquid level gauge, including;

[0007] A liquid level gauge cylinder body, on the front of which there is a combination of a two-color light box and an electrode patch;

[0008] An air pipe, arranged at the top of the liquid level gauge cylinder body and communicating with the liquid level gauge cylinder body;

[0009] A liquid pipe, arranged at the bottom of the liquid level gauge cylinder body and communicating with the liquid level gauge cylinder body;

[0010] A buffer mechanism is arranged on one side of the liquid level gauge cylinder body to form a buffer channel for the flow of the medium.

[0011] Preferably, the buffer mechanism includes a buffer bin, the buffer bin is vertically installed between the liquid level gauge cylinder body and the boiler body, and the top and bottom of the buffer bin are respectively fixedly connected to the air pipe and the liquid pipe.

[0012] Preferably, a buffer cavity is arranged inside the buffer bin, the buffer bin and the buffer cavity adopt a concentric circle structure, the inner wall diameter value of the buffer bin is greater than the inner wall diameter value of the buffer cavity, and an annular flow channel is formed by the buffer bin and the buffer cavity.

[0013] Preferably, a spiral guide vane is fixedly installed on the inner wall of the buffer bin, the spiral guide vane is located between the buffer bin and the buffer cavity, and the flow direction of the medium is changed by the spiral guide vane to reduce the flow rate.

[0014] Preferably, a conical diffuser is arranged at the top of the buffer cavity, and a tapered converging port is arranged at the bottom, which is used to reduce the turbulent impact.

[0015] Preferably, a magnetic drain valve II is arranged at the lowest point of the bottom of the buffer cavity, and sediment impurities are discharged by opening it regularly.

[0016] Preferably, a ceramic fiber thermal insulation layer is fixedly sleeved on the outer wall of the buffer bin, and a temperature sensor is embedded inside to monitor the change of the medium temperature in real time.

[0017] Preferably, a guide flange is arranged at the bottom of the liquid level gauge cylinder body, a flange cover plate is arranged at the bottom of the guide flange, and both the guide flange and the flange cover plate are communicated with the liquid level gauge cylinder body.

[0018] Preferably, a magnetic drain valve I is provided at the bottom of the flange cover plate, and the magnetic drain valve I is communicated with the liquid level gauge cylinder body.

[0019] Preferably, the spiral guide vane is integrally formed by 316L stainless steel, the spiral angle is 35 degrees, and the distance between the guide vanes is 1 / 2 of the pipe diameter. When the liquid level in the boiler fluctuates and causes the medium to flow into the buffer bin at a high speed, the spiral guide vane forces the fluid to change from axial flow to rotational flow through its spiral flow channel, converting part of the kinetic energy into the rotational energy of the fluid and significantly reducing the flow velocity.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] In the present invention, an annular flow channel is formed by the buffer bin and the buffer chamber, and in cooperation with the spiral guide vane, the linear motion of the medium is converted into rotational flow, thereby significantly reducing the flow velocity. The spiral guide vane is integrally formed by 316L stainless steel, its spiral angle is 35 degrees, and the distance between the guide vanes is 1 / 2 of the pipe diameter. This design enables the spiral guide vane to force the fluid to change from axial flow to rotational flow when the liquid level in the boiler fluctuates and causes the medium to flow into the buffer bin at a high speed, converting part of the kinetic energy into the rotational energy of the fluid and further reducing the flow velocity. In addition, a conical diffuser is provided at the top of the buffer chamber, and a tapered convergent opening is provided at the bottom. This design helps to reduce the turbulent impact and lower the hydrodynamic noise of the system. At the same time, a magnetic drain valve is provided at the lowest point of the bottom of the buffer chamber, and the deposited impurities are discharged by regularly opening it to keep the equipment clean. These measures work together to significantly improve the stability and service life of the equipment and reduce the risk of equipment damage caused by medium impact and vibration.

[0022] In the present invention, a ceramic fiber insulation layer is fixedly sleeved on the outer wall of the buffer bin. This insulation layer is made of aluminosilicate fiber and has excellent high-temperature resistance, low thermal conductivity, and good chemical stability. It can withstand extremely high temperatures, effectively insulate and keep warm, reduce heat loss, and improve energy efficiency. At the same time, the temperature sensor embedded inside the buffer bin is used to monitor the temperature change of the medium in real time to ensure that the equipment operates within a safe and efficient temperature range and prevent equipment damage or performance degradation caused by temperature changes. This design not only improves the energy efficiency of the equipment but also enhances the safety of the equipment and reduces the risk of failures caused by abnormal temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the inclined cross-section of the buffer mechanism of the structure of the present invention;

[0025] Figure 3 is a schematic diagram of the back structure of the present invention;

[0026] Figure 4 Schematic diagram of the front sectional structure of the buffer mechanism of the present invention;

[0027] Figure 5 For the present invention Figure 4 Enlarged structure diagram of A in it;

[0028] Figure 6 Exploded structure diagram of the buffer mechanism of the present invention;

[0029] Figure 7 Combined structure diagram of the buffer cavity and the spiral guide vane of the present invention.

[0030] In the figure: 1, liquid level gauge cylinder body; 11, gas pipe; 111, magnetic sewage drain valve 1; 12, liquid pipe; 13, combined component of two-color light box and electrode patch; 14, guide flange; 15, flange cover plate; 2, buffer bin; 201, buffer cavity; 202, spiral guide vane; 211, magnetic sewage drain valve 2; 3, ceramic fiber insulation layer. Specific implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figures 1 to 7 shown, the present invention provides a wireless boiler liquid level gauge including;

[0033] A liquid level gauge cylinder body 1, on the front of which there is a combined component of a two-color light box and an electrode patch 13;

[0034] A gas pipe 11, arranged at the top of the liquid level gauge cylinder body 1 and communicated with the liquid level gauge cylinder body 1;

[0035] A liquid pipe 12, arranged at the bottom of the liquid level gauge cylinder body 1 and communicated with the liquid level gauge cylinder body 1;

[0036] A buffer mechanism is arranged on one side of the liquid level gauge cylinder body 1 to form a buffer channel for the flow of the medium. The buffer mechanism includes a buffer bin 2, which is vertically installed between the liquid level gauge cylinder body 1 and the boiler body. The top and bottom of the buffer bin 2 are respectively fixedly connected to the gas pipe 11 and the liquid pipe 12. A buffer cavity 201 is arranged inside the buffer bin 2. The buffer bin 2 and the buffer cavity 201 adopt a concentric circle structure. The inner wall diameter value of the buffer bin 2 is greater than the inner wall diameter value of the buffer cavity 201, and an annular flow channel is formed through the buffer bin 2 and the buffer cavity 201.

[0037] Adopt the above solution: By arranging a two-color light box and an electrode patch assembly 13 on the front of the liquid level gauge cylinder body 1, it is used to visually display the liquid level height and transmit the liquid level value to the control room remotely. The air pipe 11 is arranged at the top of the liquid level gauge cylinder body 1 and is connected to the liquid level gauge cylinder body 1 for guiding the flow of air. The liquid pipe 12 is arranged at the bottom of the liquid level gauge cylinder body 1 and is connected to the liquid level gauge cylinder body 1 for guiding the flow of liquid. A buffer mechanism is arranged on one side of the liquid level gauge cylinder body 1 to form a buffer channel for the flow of the medium. The buffer mechanism includes a buffer bin 2, and the buffer bin 2 is vertically installed between the liquid level gauge cylinder body 1 and the boiler body. Its top and bottom are respectively fixedly connected to the air pipe 11 and the liquid pipe 12. A buffer cavity 201 is arranged inside the buffer bin 2. The buffer bin 2 and the buffer cavity 201 adopt a concentric circle structure. An annular flow channel is formed by the buffer bin 2 and the buffer cavity 201 to buffer the flow of the medium. In the two-color light box and the electrode patch assembly 13, the light of the two-color light box shows green in the liquid phase and red in the gas phase, realizing the effect of observing the liquid level on-site. A pair of capacitor plates are formed between the electrode patch and the conductive liquid in the liquid level gauge cylinder body 1. There is a corresponding capacitance value between the electrode patch and the conductive liquid. Since the wall thickness of the liquid level gauge cylinder body 1 is certain and the geometric size of the electrode patch is fixed, the capacitance value inside the electrode patch only increases and decreases with the rise and fall of the liquid column. The capacitance value of the capacitor is captured by a transducer and converted into a liquid level value and transmitted to the control room, realizing the effect of remote transmission of the liquid level value. Components such as the liquid level gauge cylinder body 1, the air pipe 11, the liquid pipe 12, and the buffer mechanism work together, which helps to improve the overall performance and stability of the equipment. The liquid level gauge cylinder body 1 provides high-precision liquid level measurement; the air pipe 11 and the liquid pipe 12 ensure the smooth flow of air and liquid; the buffer mechanism reduces the impact and vibration of the medium flow; the two-color light box and the electrode patch assembly 13 visually display the liquid level height and transmit the liquid level value to the control room remotely.

[0038] An annular flow channel is formed by the buffer bin and the buffer cavity, and in cooperation with the spiral guide vanes, the linear motion of the medium is converted into rotational flow, thereby significantly reducing the flow rate. The spiral guide vanes are integrally formed of 316L stainless steel, with a spiral angle of 35 degrees and a guide vane spacing of 1 / 2 of the pipe diameter. This design enables when the liquid level in the boiler fluctuates and causes the medium to flow into the buffer bin at a high speed, the spiral guide vanes can force the fluid to change from axial flow to rotational flow, converting part of the kinetic energy into the rotational energy of the fluid and further reducing the flow rate. In addition, a conical diffuser is arranged at the top of the buffer cavity, and a tapered convergent opening is arranged at the bottom. This design helps to reduce the turbulent impact and lower the hydrodynamic noise of the system. At the same time, a magnetic drain valve is arranged at the lowest point at the bottom of the buffer cavity, and by regularly opening it, the deposited impurities are discharged to keep the equipment clean. These measures work together to significantly improve the stability and service life of the equipment and reduce the risk of equipment damage caused by the impact and vibration of the medium.

[0039] A ceramic fiber insulation layer is fixedly sleeved on the outer wall of the buffer bin. This insulation layer is made of aluminosilicate fiber and has excellent high-temperature resistance, low thermal conductivity, and good chemical stability. It can withstand extremely high temperatures, effectively insulate and keep warm, reduce heat loss, and improve energy efficiency. At the same time, a temperature sensor embedded inside the buffer bin is used to monitor the temperature change of the medium in real time, ensuring that the equipment operates within a safe and efficient temperature range and preventing equipment damage or performance degradation caused by temperature changes. This design not only improves the energy efficiency of the equipment but also enhances its safety and reduces the risk of failures caused by abnormal temperatures.

[0040] As Figures 3 to 4 shown, a spiral guide vane 202 is fixedly installed on the inner wall of the buffer bin 2. The spiral guide vane 202 is located in the middle between the buffer bin 2 and the buffer chamber 201. By changing the flow direction of the medium through the spiral guide vane 202, the flow rate is reduced. A conical diffuser is provided at the top of the buffer chamber 201, and a tapered converging port is provided at the bottom to reduce turbulent impact. A magnetic drain valve II 211 is provided at the lowest point of the bottom of the buffer chamber 201, and sediment impurities are discharged regularly by opening it.

[0041] Adopting the above solution: A spiral guide vane 202 is fixedly installed on the inner wall of the buffer bin 2. The spiral guide vane 202 is located in the middle between the buffer bin 2 and the buffer chamber 201. The spiral guide vane 202 changes the flow direction of the medium, converting the linear motion of the medium into a uniform swirling motion, thereby alleviating the impact force during the falling process of the medium and reducing the flow rate. A conical diffuser is provided at the top of the buffer chamber 201, and a tapered converging port is provided at the bottom. The conical diffuser is used to expand the cross-sectional area of the pipeline, reduce the fluid flow rate and pressure; the tapered converging port is used to reduce the cross-sectional area of the pipeline, increase the fluid flow rate and pressure. This design helps to reduce turbulent impact. A magnetic drain valve II 211 is provided at the lowest point of the bottom of the buffer chamber 201. The magnetic drain valve II 211 controls the opening and closing of the gate plate through an electromagnet to achieve the function of regular sewage discharge. When the electromagnet is energized, the gate plate is attracted and the flow port opens, and the sewage is quickly discharged; when the electromagnet is de-energized, the gate plate closes under the action of the spring to achieve sealing.

[0042] As Figures 1 to 4 shown, a ceramic fiber insulation layer 3 is fixedly sleeved on the outer wall of the buffer bin 2, and a temperature sensor is embedded inside to monitor the temperature change of the medium in real time. A diversion flange 14 is provided at the bottom of the liquid level gauge cylinder 1, and a flange cover plate 15 is provided at the bottom of the diversion flange 14. Both the diversion flange 14 and the flange cover plate 15 are connected to the liquid level gauge cylinder 1. A magnetic drain valve I 111 is provided at the bottom of the flange cover plate 15, and the magnetic drain valve I 111 is connected to the liquid level gauge cylinder 1.

[0043] Adopting the above solution: By fixedly sleeving a ceramic fiber thermal insulation layer 3 on the outer wall of the buffer bin 2 and embedding a temperature sensor inside to monitor the change of the medium temperature in real time. The ceramic fiber thermal insulation layer 3 is made of aluminosilicate fiber, which has excellent high-temperature resistance, low thermal conductivity and good chemical stability. It can withstand extremely high temperatures, effectively insulate heat and keep warm, reduce heat loss, and improve energy efficiency. The temperature sensor is used to monitor the change of the medium temperature in real time to ensure that the equipment operates within a safe and efficient temperature range, preventing equipment damage or performance degradation caused by temperature changes. A diversion flange 14 is provided at the bottom of the liquid level gauge cylinder body 1, and a flange cover plate 15 is provided at the bottom of the diversion flange 14. Both the diversion flange 14 and the flange cover plate 15 are communicated with the liquid level gauge cylinder body 1. They are used to guide the flow of the medium to ensure that the medium in the liquid level gauge cylinder body 1 can stably and accurately reflect the liquid level in the boiler. A magnetic drain valve I 111 is provided at the bottom of the flange cover plate 15, and the magnetic drain valve I 111 is communicated with the liquid level gauge cylinder body 1. It is used to regularly discharge the deposited impurities in the liquid level gauge cylinder body 1 to keep the liquid level gauge cylinder body 1 clean and the measurement accuracy.

[0044] As Figures 6 to 7 shown, the spiral guide vane 202 is integrally formed of 316L stainless steel, with a spiral angle of 35 degrees and a guide vane spacing of 1 / 2 of the pipe diameter. When the liquid level in the boiler fluctuates and causes the medium to flow into the buffer bin 2 at a high speed, the spiral guide vane 202 forces the fluid to change from axial flow to rotational flow through its spiral flow channel, converting part of the kinetic energy into the rotational energy of the fluid and significantly reducing the flow rate.

[0045] Adopting the above solution: Since the spiral guide vane 202 is integrally formed of 316L stainless steel, with a spiral angle of 35 degrees and a guide vane spacing of 1 / 2 of the pipe diameter, when the liquid level in the boiler fluctuates and causes the medium to flow into the buffer bin 2 at a high speed, the spiral guide vane 202 can force the fluid to change from axial flow to rotational flow through its spiral flow channel. The change in the flow pattern generates a centrifugal force, thereby realizing gas-liquid separation. Specifically, the fluid forms a spiral flow under the action of the spiral guide vane 202. During the upward movement, due to the action of the centrifugal force, the liquid phase moves along the wall surface of the buffer bin, and the gas phase moves along the center of the buffer bin. This gas-liquid separation method helps to reduce the impact and wear of the fluid on the equipment and improve the stability and service life of the equipment.

[0046] The working principle and usage process of the present invention:

[0047] When the liquid level in the boiler fluctuates rapidly, the medium enters through the annular flow channel between the buffer bin 2 and the buffer chamber 201, and the straight-line flow is converted into rotational flow through the spiral guide vane 202, so that the kinetic energy of the medium is consumed, thus making the flow velocity of the medium entering the liquid level gauge cylinder body 1 tend to be stable. After the flow velocity in the buffer bin 2 decreases, the impurities in the medium settle to the bottom due to gravity and are discharged through the magnetic drain valve two 211; the ceramic fiber thermal insulation layer 3 is adopted to reduce the heat exchange between the medium and the environment and avoid the measurement error caused by the density difference due to the sudden temperature change.

[0048] It should be noted that in this text, relational terms such as first and second are only used 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wireless boiler liquid level gauge, characterized in that, Comprising; A liquid level gauge cylinder body (1), on the front of which there is a combination of a two-color light box and an electrode patch (13); An air pipe (11), arranged at the top of the liquid level gauge cylinder body (1) and communicating with the liquid level gauge cylinder body (1); A liquid pipe (12), arranged at the bottom of the liquid level gauge cylinder body (1) and communicating with the liquid level gauge cylinder body (1); A buffer mechanism is arranged on one side of the liquid level gauge cylinder body (1) to form a buffer channel for the flow of the medium.

2. The wireless boiler liquid level gauge according to claim 1, characterized in that: The buffer mechanism includes a buffer bin (2), which is vertically installed between the liquid level gauge cylinder body (1) and the boiler body. The top and bottom of the buffer bin (2) are respectively fixedly connected to the air pipe (11) and the liquid pipe (12).

3. The wireless boiler liquid level gauge according to claim 2, wherein: A buffer cavity (201) is arranged inside the buffer bin (2). The buffer bin (2) and the buffer cavity (201) adopt a concentric circle structure. The inner wall diameter value of the buffer bin (2) is larger than the inner wall diameter value of the buffer cavity (201), and an annular flow channel is formed by the buffer bin (2) and the buffer cavity (201).

4. The wireless boiler liquid level gauge according to claim 3, characterized in that: A spiral guide vane (202) is fixedly installed on the inner wall of the buffer bin (2). The spiral guide vane (202) is located between the buffer bin (2) and the buffer cavity (201), and the flow direction of the medium is changed by the spiral guide vane (202) to reduce the flow rate.

5. The wireless boiler liquid level gauge according to claim 3, characterized in that: A conical diffuser is arranged at the top of the buffer cavity (201), and a tapered converging opening is arranged at the bottom to reduce the turbulent impact.

6. The wireless boiler liquid level gauge according to claim 3, characterized in that: A magnetic drain valve II (211) is arranged at the lowest point of the bottom of the buffer cavity (201), and sediment impurities are discharged by opening it regularly.

7. The wireless boiler liquid level gauge according to claim 2, characterized in that: A ceramic fiber thermal insulation layer (3) is fixedly sleeved on the outer wall of the buffer bin (2), and a temperature sensor is embedded inside to monitor the change of the medium temperature in real time.

8. The wireless boiler liquid level gauge according to claim 1, wherein: A guiding flange (14) is arranged at the bottom of the liquid level gauge cylinder body (1), and a flange cover plate (15) is arranged at the bottom of the guiding flange (14). Both the guiding flange (14) and the flange cover plate (15) communicate with the liquid level gauge cylinder body (1).

9. The wireless boiler liquid level gauge according to claim 8, characterized in that: A magnetic drain valve I (111) is arranged at the bottom of the flange cover plate (15), and the magnetic drain valve I (111) communicates with the liquid level gauge cylinder body (1).

10. The wireless boiler liquid level gauge according to claim 4, characterized in that: The spiral guide vane (202) is integrally formed by 316L stainless steel, the spiral angle is 35 degrees, and the distance between the guide vanes is 1 / 2 of the pipe diameter. When the liquid level in the boiler fluctuates and causes the medium to flow into the buffer bin (2) at a high speed, the spiral guide vane (202) forces the fluid to change from axial flow to rotational flow through its spiral flow channel, converting part of the kinetic energy into the rotational energy of the fluid and significantly reducing the flow rate.

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