Plate type liquid level meter for measuring liquid level of hot well of steam turbine

Abstract

The utility model discloses a plate-type liquidometer for measuring the liquid level of a hot well of a steam turbine, which comprises a liquidometer body and a cleaning device, and the cleaning device is in telecommunication connection with a control cabinet of the steam turbine; the cleaning device further comprises an inner pipe cleaning mechanism and a glass plate cleaning mechanism, the inner pipe cleaning mechanism is arranged below a water body pipe of the liquid level meter body, and the glass plate cleaning mechanism is arranged on the front side of a glass plate of the liquid level meter body. The glass plate observation window has the function that dirt can be cleaned when the dirt appears on the glass plate observation window, and cleaning can be completed without preparing extra cleaning tools; the filter screen is arranged, so that impurities in a hot well are prevented from entering the liquidometer to cause blockage and reduce the accuracy of the liquidometer when the liquidometer works normally; dirt on the left sides of the water body pipe and the filter screen can be removed simultaneously, and clearness of imaging in the water body pipe is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to liquid level measurement technical field especially relates to a plate type liquid level meter for steam turbine hot well liquid level measurement. BACKGROUND

[0002] Steam turbine is an important power equipment, and is widely used in electric power, chemical industry, metallurgy and other industries. The hot well is a key component of the steam turbine condensing system, and the accurate measurement and stable control of the liquid level are crucial for the safe and efficient operation of the steam turbine. If the liquid level is too high, the steam turbine may be flooded, damaging the key components such as blades; if the liquid level is too low, it will affect the normal operation of the condensate pump, reduce the vacuum degree of the condenser, and thus affect the thermal efficiency of the steam turbine. Therefore, selecting the appropriate liquid level measuring instrument is of great significance to ensure the stable operation of the steam turbine.

[0003] In the prior art, many steam turbine manufacturers choose magnetic flap liquid level meter for on-site measurement of hot well liquid level. The magnetic flap liquid level meter is developed based on the principle of buoyancy and magnetic coupling. When the liquid level in the measured container rises or falls, the magnetic float in the liquid level meter body tube also rises or falls. The permanent magnet in the float transmits the magnetic coupling to the magnetic flip column indicator, driving the red and white flip column to flip 180°. When the liquid level rises, the flip column changes from white to red; when the liquid level falls, the flip column changes from red to white. The red and white junction of the indicator indicates the actual height of the liquid level in the container, thus realizing clear indication of the liquid level.

[0004] However, in actual use, the float of the magnetic flap liquid level meter is affected by density and vacuum degree, and the liquid level fluctuates greatly, making the measurement false. It is difficult for the operator to determine the real liquid level of the hot well. Therefore, after repeated selection and use, the plate type liquid level meter has unique advantages, is completely connected with the hot well, and can truly observe the fluctuation process of the liquid level of the hot well. The liquid level measurement is intuitive and clear, and can be widely applied in the measurement of the liquid level of the steam turbine hot well.

[0005] However, the following defects still exist in the prior art: 1. After a long time of operation, dirt and impurities may adhere to the surface of the glass plate, or the glass plate may be eroded by condensed water, resulting in blurred display; 2. Impurities and sediments in the steam turbine may cause blockage of the connecting pipeline, thereby causing abnormal liquid level display; 3. The water pipe inside the glass plate liquid level meter may be eroded and damaged by the water vapor condensation and scaling in the hot well, and the display may be blurred.

[0006] Therefore, the present application provides a plate type liquid level meter for steam turbine hot well liquid level measurement. CONTENT OF THE UTILITY MODEL

[0007] To solve the above technical problems, the utility model discloses a kind of plate type liquid level meter for steam turbine hot well liquid level measurement, can clean dirt when dirt appears in glass plate observation port, without preparing additional cleaning tool to be cleaned;Filter screen is set to prevent the impurities in hot well from entering liquid level meter to cause blockage to reduce the accuracy of liquid level meter when liquid level meter is normally operated;Water body pipe and the dirt of filter screen left side can be cleaned out simultaneously, ensure the clarity of water body pipe internal display.

[0008] To achieve the above technical effects, the utility model provides a kind of plate type liquid level meter for steam turbine hot well liquid level measurement, including liquid level meter body, cleaning device, and cleaning device with steam turbine control cabinet electric connection;The cleaning device further includes inner tube cleaning mechanism, glass plate cleaning mechanism, inner tube cleaning mechanism is set below the water body pipe of liquid level meter body, and glass plate cleaning mechanism is set in the front side of the glass plate of liquid level meter body.

[0009] As preferred, the inner tube cleaning mechanism further includes cleaning water valve, electric turbofan, cleaning block, blowdown pipeline, exhaust pipeline, exhaust valve, cleaning water valve is set below water body pipe, electric turbofan is set above cleaning water valve, cleaning block is set above electric turbofan, blowdown pipeline is set in the left side of the pipeline between electric turbofan and cleaning water valve, exhaust pipeline is set above liquid level meter body and is communicated with water body pipe, and exhaust valve is set in exhaust pipeline.

[0010] As preferred, the top of electric turbofan is provided with electromagnet.

[0011] As preferred, the cleaning block further includes magnet, turbofan blade and cleaning ring, magnet is arranged inside turbofan blade, and cleaning ring is arranged above turbofan blade.

[0012] As preferred, the side of turbofan blade is provided with cleaning strip of flexible material.

[0013] As preferred, the blowdown pipeline further includes filter screen, settling tube and blowdown valve, filter screen is arranged in the right side pipeline inside bottom valve below liquid level meter body, settling tube is arranged below left side of filter screen, and blowdown valve is arranged below settling tube.

[0014] As preferred, the glass plate cleaning mechanism further includes shell, cleaning head, limiting rod, button and spring, shell is arranged at the front side of water level meter and is slidably connected between the front side of water level meter and the sliding groove, cleaning head is fixedly connected to the rear side of shell, the front end of cleaning head is attached to the observation window outside glass plate, limiting rod is arranged at both sides inside shell respectively, and the rear end of limiting rod is matched with the limiting hole arranged below the front side of liquid level meter body, the rear side of limiting rod passes through shell, spring is arranged at the rear side of limiting rod, and button is arranged at the side of limiting rod respectively and is slidably connected with limiting rod through inclined surface.

[0015] Compared with the prior art, the utility model have the advantages that:

[0016] The device is provided with a glass plate cleaning mechanism, which can clean dirt when the dirt appears on the glass plate observation port, and the cleaning can be completed without preparing additional cleaning tools; the filter screen and the inner tube cleaning mechanism are provided, the filter screen prevents impurities in the hot well from entering the liquid level meter to cause blockage and reduce the accuracy of the liquid level meter body when the liquid level meter normally works, and the inner tube cleaning mechanism can simultaneously clean the dirt on the left side of the filter screen and the water body pipe, ensuring the clarity of the internal display of the water body pipe. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is an isometric view of the utility model;

[0018] Figure 2 is a front view of the utility model;

[0019] Figure 3 is a left view of the utility model;

[0020] Figure 4 is a sectional view of a in a; Figure 3

[0021] Figure 5 is a partial schematic view of b; Figure 4

[0022] Figure 6 is a partial schematic view of c in a; Figure 3

[0023] In the drawings, the component list represented by each sign is as follows:

[0024] 1, liquid level meter body; 2, inner tube cleaning mechanism; 3, glass plate cleaning mechanism; 4, clean water valve; 5, electric turbofan; 6, cleaning block; 7, blowdown pipeline; 8, exhaust pipeline; 9, exhaust valve; 10, electromagnet; 11, magnet; 12, turbofan blade; 13, cleaning ring; 14, filter screen; 15, settling tube; 16, blowdown valve; 17, shell; 18, cleaning head; 19, limit rod; 20, button; 21, spring; 22, water body pipe; 23, bottom valve. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model. Embodiment 1

[0026] As Figures 1 to 6 ​​​As shown in the drawings:

[0027] In the prior art, the inventor found the following defects: 1. After a long time of operation, dirt and impurities may adhere to the surface of the glass plate, or the glass plate may be eroded by condensed water, resulting in display blurring; 2. Impurities and deposits in the turbine may cause the connecting pipe to be blocked, thereby causing abnormal liquid level display; 3. The water body pipe of the glass plate liquid level meter is affected by water vapor condensation and scaling in the hot well, which may cause the inner wall of the water body pipe to be eroded and damaged over a long period of time, and the display may become blurred;

[0028] Therefore, the inventor provides a plate type liquid level meter for measuring the liquid level of a turbine hot well, which comprises a liquid level meter body 1 and a cleaning device, wherein the cleaning device is in electrical connection with a turbine control cabinet; the cleaning device further comprises an inner pipe cleaning mechanism 2 and a glass plate cleaning mechanism 3, the inner pipe cleaning mechanism 2 is arranged below a water body pipe 22 of the liquid level meter body 1, and the glass plate cleaning mechanism 3 is arranged on the front side of the glass plate of the liquid level meter body 1.

[0029] By using the above scheme, the glass plate cleaning mechanism 3 can clean the dirt on the surface of the glass plate inside the scale table during the operation of the liquid level meter. When the internal water level pipe is polluted and the color development is unclear, the left end valve of the liquid level meter is closed to cut off the liquid level signal of the liquid level meter, and the inner pipe cleaning mechanism 2 is opened. The cleaning water pipe is connected from below the glass inner pipe cleaning mechanism 2 to flush out the dirt inside the water body pipe 22 to complete the cleaning. Embodiment 2

[0030] As shown in the drawings: Figures 1 to 6

[0031] Further, the inner pipe cleaning mechanism 2 further comprises a cleaning water valve 4, an electrically driven turbofan 5, a cleaning block 6, a blowdown pipe 7, an exhaust pipe 8, and an exhaust valve 9. The cleaning water valve 4 is arranged below the water body pipe 22, the electrically driven turbofan 5 is arranged above the cleaning water valve 4, the cleaning block 6 is arranged above the electrically driven turbofan 5, the blowdown pipe 7 is arranged on the left side of the pipe between the electrically driven turbofan 5 and the cleaning water valve 4, the exhaust pipe 8 is arranged above the liquid level meter body 1 and communicates with the water body pipe 22, and the exhaust valve 9 is arranged on the exhaust pipe 8.

[0032] Further, an electromagnet 10 is arranged above the electrically driven turbofan 5.

[0033] Further, the cleaning block 6 further comprises a magnet 11, a turbofan blade 12, and a cleaning ring 13. The magnet 11 is arranged inside the turbofan blade 12, and the cleaning ring 13 is arranged above the turbofan blade 12.

[0034] Further, a cleaning strip made of flexible material is arranged on the side surface of the turbofan blade 12 (not shown in the figure).

[0035] ​Further, the blowdown pipe 7 further comprises a filter screen 14, a settling pipe 15, and a blowdown valve 16. The filter screen 14 is arranged inside the pipe right to the lower valve 23 of the liquid level meter body 1. The settling pipe 15 is arranged below the left side of the filter screen 14. The blowdown valve 16 is arranged below the settling pipe 15.

[0036] When the water body pipe 22 needs to be cleaned, the operator closes the upper and lower valves 23 of the liquid level meter body 1, connects the cleaning water below the cleaning water valve 4, opens the blowdown valve 16, and starts the electrically driven turbofan 5 to suck the cleaning water. The gas in the water body pipe 22 is discharged from the upper blowdown pipe 8. The residual water in the water body pipe 22 is discharged through the blowdown valve 16. Then, the blowdown pipe 7 is closed. The electrically driven turbofan 5 sucks the cleaning water and drives the cleaning water to rotate upward to wash the inner wall of the water body pipe 22. At the same time, the electromagnet 10 is powered off to release the magnet 11 on the cleaning block 6. The rotating water flow drives the turbofan blades 12 of the cleaning block 6. The cleaning block 6 rotates upward. The cleaning strips around the cleaning ring 13 wash the water body pipe 22. When the cleaning block 6 reaches the highest position, the electrically driven turbofan 5 is reversed. The blowdown valve 16 is opened. The electrically driven turbofan 5 drives the sewage to flow out of the blowdown pipe 7. In the process, the sewage is washed in the opposite direction of the filter screen 14. The filter screen 14 can resist the dirt and impurities in the hot well. The dirt attached to the right side of the filter screen 14 can be washed away during the cleaning process. The cleaning of the water body pipe 22 and the filter screen 14 is completed. The cleaning of the filter screen 14 can be ensured while the water body pipe 22 is clearly cleaned. Embodiment 3

[0037] As shown in Figures 1 to 6

[0038] Further, the glass plate cleaning mechanism 3 further comprises a shell 17, a cleaning head 18, a limiting rod 19, a button 20, and a spring 21. The shell 17 is arranged on the front side of the water level meter and is connected to the sliding groove on the side of the water level meter. The cleaning head 18 is fixedly connected to the rear side of the shell 17. The front end of the cleaning head 18 is attached to the outside of the observation window of the glass plate. The limiting rods 19 are arranged on both sides of the shell 17. The rear ends of the limiting rods 19 are matched with the limiting holes (not shown in the figure) arranged below the front side of the liquid level meter body 1. The rear sides of the limiting rods 19 pass through the shell 17. The spring 21 is arranged on the rear side of the limiting rod 19. The buttons 20 are arranged on the side surfaces of the limiting rods 19 and are connected to the limiting rods 19 through inclined surfaces.

[0039] ​In the non-use state, the spring 21 pushes the limiting rod 19 to be clamped in the limiting hole of the liquid level meter body 1, when using, the button 20 is pressed inward from both sides of the shell 17, the limiting rod 19 is pushed outward to slide out of the limiting hole on the sliding groove, after the limiting rod 19 is separated from the limiting hole, the operator can slide outside the liquid level meter body 1, so that the cleaning head 18 can slide up and down in the observation port of the liquid level meter body 1 to clean the glass plate, after cleaning, the button 20 is released, the spring 21 pushes the limiting rod 19 back to the limiting hole, and the cleaning is completed.

[0040] In summary, the device is provided with the glass plate cleaning mechanism 3, dirt can be cleaned when the dirt appears on the glass plate observation port, and the cleaning can be completed without preparing additional cleaning tools; the filter screen 14 and the inner tube cleaning mechanism 2 are provided, the filter screen 14 prevents impurities in the hot well from entering the liquid level meter body 1 to cause blockage and reduce the accuracy of the liquid level meter body 1 when the liquid level meter body 1 works normally, and the inner tube cleaning mechanism 2 can clean the dirt on the left side of the filter screen 14 and the water body pipe 22 at the same time, so that the clarity of the inside of the water body pipe 22 is ensured.

[0041] The working principle of the utility model is as follows:

[0042] In the non-use state, the spring 21 pushes the limiting rod 19 to be clamped in the limiting hole of the liquid level meter body 1, when using, the button 20 is pressed inward from both sides of the shell 17, the limiting rod 19 is pushed outward to slide out of the limiting hole on the sliding groove, after the limiting rod 19 is separated from the limiting hole, the operator can slide outside the liquid level meter body 1, so that the cleaning head 18 can slide up and down in the observation port of the liquid level meter body 1 to clean the glass plate, after cleaning, the button 20 is released, the spring 21 pushes the limiting rod 19 back to the limiting hole, and the cleaning is completed without preparing additional cleaning tools.

[0043] When the inside of the water body pipe 22 needs to be cleaned, the operator closes the upper and lower valves 23 of the liquid level meter body 1, connects the cleaning water below the cleaning water valve 4, opens the exhaust valve 9 above the liquid level meter body 1, starts the electrically driven vortex fan 5 to suck the cleaning water below, the gas in the water body pipe 22 is discharged from the upper exhaust pipe 8, the blowdown valve 16 is opened to discharge the residual water in the water body pipe 22, then the blowdown pipe 7 is closed, the electrically driven vortex fan 5 sucks the cleaning water and drives the cleaning water to rotate upward to wash the inner wall of the water body pipe 22, at the same time, the electromagnet 10 is powered off to release the magnet 11 on the cleaning block 6, the rotating water flow drives the vortex fan blades 12 of the cleaning block 6, the cleaning block 6 rotates upward, the cleaning strip around the cleaning ring 13 washes the water body pipe 22, when the cleaning block 6 rises to the highest position and the washing is completed, the electrically driven vortex fan 5 is reversed, the blowdown valve 16 is opened, and the electrically driven vortex fan 5 flushes the sewage out of the blowdown pipe 7, in the process, the sewage is flushed in the reverse direction through the filter screen 14, the filter screen can resist the dirt and impurities coming from the thermal well in the process of use, the filter screen 14 prevents the impurities in the thermal well from entering the liquid level meter body 1 to cause blockage and reduce the accuracy of the liquid level meter body 1 when the liquid level meter body 1 is normally working, the dirt attached to the right side of the filter screen 14 can be washed down during the washing process, and the cleaning of the water body pipe 22 and the filter screen 14 is completed as the sewage is discharged from the blowdown pipe 7, which can ensure that the inside of the water body pipe 22 is clearly cleaned and the filter screen 14 is cleaned at the same time, and the clarity of the inside of the water body pipe 22 is ensured.

[0044] Up to now, the working principle of the device is described.

[0045] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily implying any actual relationship or order between such entities or actions. Also, 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.

[0046] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A plate level gauge for steam turbine hotwell level measurement comprising a level gauge body (1), a cleaning device, the cleaning device is in electrical communication with the steam turbine control cabinet, characterized in that: The cleaning device further comprises an inner tube cleaning mechanism (2) and a glass plate cleaning mechanism (3), the inner tube cleaning mechanism (2) is arranged below the water body pipe (22) of the liquid level meter body (1), and the glass plate cleaning mechanism (3) is arranged on the front side of the glass plate of the liquid level meter body (1).

2. A plate level gauge for steam turbine hotwell level measurement as claimed in claim 1 wherein: The inner tube cleaning mechanism (2) further comprises a cleaning water valve (4), an electric turbofan (5), a cleaning block (6), a sewage pipeline (7), an exhaust pipeline (8) and an exhaust valve (9), the cleaning water valve (4) is arranged below the water body pipe (22), the electric turbofan (5) is arranged above the cleaning water valve (4), the cleaning block (6) is arranged above the electric turbofan (5), the sewage pipeline (7) is arranged on the left side of the pipeline between the electric turbofan (5) and the cleaning water valve (4), the exhaust pipeline (8) is arranged above the liquid level meter body (1) and communicates with the water body pipe (22), and the exhaust valve (9) is arranged on the exhaust pipeline (8).

3. A plate level gauge for measuring the liquid level in a steam turbine hotwell according to claim 2, wherein: An electromagnet (10) is arranged above the electric turbofan (5).

4. A plate level gauge for measuring the liquid level in a steam turbine hot well according to claim 2, characterised in that: The cleaning block (6) further comprises a magnet (11), a turbofan blade (12) and a cleaning ring (13), the magnet (11) is arranged inside the turbofan blade (12), and the cleaning ring (13) is arranged above the turbofan blade (12).

5. A plate level gauge for measuring the liquid level in a steam turbine hotwell according to claim 4, wherein: The side surface of the turbofan blade (12) is provided with a cleaning strip made of flexible material.

6. A plate level gauge for measuring the liquid level in a hotwell of a steam turbine according to claim 2, characterized in that: The sewage pipeline (7) further comprises a filter screen (14), a sedimentation pipe (15) and a sewage valve (16), the filter screen (14) is arranged inside the pipeline on the right side of the bottom valve (23) below the liquid level meter body (1), the sedimentation pipe (15) is arranged below and on the left side of the filter screen (14), and the sewage valve (16) is arranged below the sedimentation pipe (15).

7. A plate level gauge for measuring the liquid level in a hotwell of a steam turbine according to claim 1, characterized in that: The glass plate cleaning mechanism (3) further comprises a shell (17), a cleaning head (18), a limiting rod (19), a button (20) and a spring (21), the shell (17) is arranged on the front side of the water level meter and is in sliding connection with the sliding groove on the side surface of the water level meter, the cleaning head (18) is fixedly connected to the rear side of the shell (17), the front end of the cleaning head (18) is attached to the outside of the observation window of the glass plate, the limiting rods (19) are respectively arranged on the two sides of the shell (17), the rear ends of the limiting rods (19) are matched with the limiting holes arranged below the front side of the liquid level meter body (1), the rear sides of the limiting rods (19) pass through the shell (17), the spring (21) is arranged on the rear side of the limiting rod (19), and the buttons (20) are respectively arranged on the side surfaces of the limiting rods (19) and are in sliding connection with the limiting rods (19) through inclined surfaces.

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