A mechanical water-coal slurry storage tank liquid level measuring device

Abstract

The present invention relates to the field of liquid level measurement technology, and specifically discloses a mechanical water-coal slurry storage tank liquid level measuring device, comprising: a tank body, a mounting opening is provided on the top thereof, and a measuring frame is fixedly installed on the inner wall of the mounting opening, the bottom of the measuring frame extends to the inner bottom of the tank body; an instrument barrel, an observation port for fixing the instrument barrel is provided on one side of the measuring frame, and an annular scale line is provided on the inner wall of one side of the measuring frame, and an indicator needle is rotatably connected to the middle of the inner wall of one side of the measuring frame via a pin. The present invention can effectively push away precipitated coal particles to prevent them from getting stuck on an annular floating platform, and can also overcome the high viscosity resistance of the water-coal slurry, allowing the annular floating platform to move quickly and stably with changes in the liquid level, avoiding measurement failure problems caused by stagnation or slow rise, and can also amplify the tiny displacement of the annular floating platform and accurately convert it into a noticeable rotation of the indicator needle, thereby realizing rapid measurement of the liquid level.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid level measurement, in particular to a mechanical liquid level measuring device for a water-coal slurry storage tank. Background Art

[0002] Coal-water slurry (CWS) is a low-pollution, high-efficiency, pipeline-transportable coal-based fluid fuel substitute for oil, manufactured through physical processing of coal, water, and a small amount of additives with a defined particle size distribution. It exhibits high concentration, high viscosity, and easy particle settling. In CWS applications, storage tanks serve as an intermediate storage link, temporarily storing centrally produced CWS to ensure continuity during subsequent use. To ensure stable production processes and safe storage and use, CWS tanks require level measurement devices to monitor the CWS level in real time.

[0003] At present, commonly used methods for measuring the liquid level of water-coal slurry storage tanks include float-type liquid level measurement, such as a mechanical liquid level measurement structure with authorization announcement number CN218822643U, which includes a measuring tube, a circular hole is opened at the bottom of one side of the circumferential outer wall of the rising measuring tube, and a connecting tube is welded and fixed to the inner wall of the circular hole, base blocks are provided on both sides of the inner wall of the measuring tube, a slide rail is fixedly installed on the middle part of one side between the two base blocks by screws, the same rising tube is slidably installed between the two slide rails, and a buoyancy block is fixedly installed on the bottom of the rising tube by screws, a slot rod is fixedly installed on the side of the measuring tube away from the circular hole by bolts, and an embedded groove is opened on the side of the slot rod away from the measuring tube.

[0004] In combination with the above patents, it is found that the existing technology has the following shortcomings: in the water-coal slurry environment, the float of the traditional float-type liquid level measuring device is not only easily stuck by the settled coal particles, but also rises slowly due to the high viscosity of the water-coal slurry, making it impossible to achieve rapid measurement of the liquid level, resulting in measurement failure, and maintenance is difficult and costly. Therefore, a mechanical water-coal slurry storage tank liquid level measuring device is urgently needed to solve the above problems. Summary of the Invention

[0005] In response to the problems in the related art, the present invention proposes a mechanical water-coal slurry storage tank liquid level measuring device to overcome the above-mentioned technical problems existing in the existing related art.

[0006] The technical solution of the present invention is achieved as follows:

[0007] A mechanical water-coal slurry storage tank liquid level measuring device, comprising:

[0008] The tank body has a mounting opening on its top, and a measuring frame is fixedly mounted on the inner wall of the mounting opening, and the bottom of the measuring frame extends to the inner bottom of the tank body;

[0009] An instrument barrel, wherein one side of the measuring frame is provided with an observation port for fixing the instrument barrel, and an inner wall of one side of the measuring frame is provided with an annular scale line, and an indicator needle is rotatably connected to the middle of the inner wall of one side of the measuring frame via a pin, and the position of the indicator needle corresponds to the position of the scale line;

[0010] A guide rod is fixedly mounted on the middle of the top inner wall of the measuring frame, and an annular counterweight frame is sleeved on the outer wall of the guide rod. The counterweight frame is a hollow frame structure, and an annular floating platform is fixedly mounted on the outer wall of the counterweight frame;

[0011] a transmission assembly, which is disposed between the outer wall of the counterweight frame and the inner wall of the measuring frame and is used to drive the indicator needle to rotate;

[0012] The inner wall of the annular floating platform is fixed with spiral fins, and the bottom of the spiral fins is fixed with connecting rods distributed in a spiral at equal distances, and a sliding ball is rotatably set at one end of the connecting rod. The outer wall of the guide rod is provided with a spiral guide groove, and the sliding ball is rolled on the inner wall of the spiral guide groove. The spiral direction of the spiral guide groove is the same as the spiral direction of the spiral fins.

[0013] The present invention is further configured such that a liquid outlet is provided at the bottom of the middle of the outer wall around the measuring frame, and a filter is installed at the liquid outlet. The filter is made of a stainless steel sintered mesh, and the pore size of the filter is 0.5-1 mm.

[0014] The present invention is further configured as follows: the transmission assembly includes two fixed plates fixed to the inner wall of one side of the measuring frame, and one end of the two fixed plates is rotatably connected to a rotating plate through a pin shaft, and a movable groove is provided on the rotating plate. The inner wall of the counterweight frame is rotatably connected to a mounting ring through a sealed bearing, and both ends of the mounting ring are rotatably connected to a T-shaped rod through a pin shaft, and the T-shaped rod passes through the inside of the movable groove, and a push-pull rod is rotatably connected between the two rotating plates through a pin shaft, and the top of the push-pull rod is rotatably connected to a rack plate through a pin shaft, the inner wall of the other side of the measuring frame is rotatably connected to the mounting shaft through a bearing, and a gear is fixedly installed on the outer wall of the mounting shaft, the gear is meshed with the rack plate, and a magnetic attraction assembly is provided between the gear and the indicator needle.

[0015] The present invention is further configured such that the magnetic attraction assembly includes an active magnetic block fixedly mounted on one side of the gear, and a driven magnetic block fixedly mounted on one side of the indicator needle, the position of the driven magnetic block corresponds to the position of the active magnetic block, the active magnetic block and the driven magnetic block are both neodymium iron boron permanent magnets, and are symmetrically distributed on both sides of the end of the non-magnetic instrument barrel, and the spacing between the active magnetic block and the driven magnetic block is 5-10 mm.

[0016] The present invention is further configured such that a slider is fixedly mounted on the top of the inner wall of one end of the measuring frame, and a sliding groove for inserting the slider is provided on one side of the rack plate, and the cross-section of the sliding groove and the cross-section of the slider are designed to be T-shaped.

[0017] The present invention is further configured such that guide frames are fixedly mounted in the middle of both inner walls of the measuring frame, and guide seats inserted in the guide frames are rotatably connected in the middle of one end of the two T-shaped rods.

[0018] The present invention is further configured such that the top and bottom surfaces of the annular floating platform are both configured to be pointed, and the surface of the annular floating platform, the surface of the counterweight frame and the surface of the transmission component are all coated with a super-hydrophobic and super-oleophilic coating.

[0019] The present invention is further configured such that the scale lines are printed with a fluorescent coating, a reflective patch is provided at the end of the indicator needle, a visual panel is fixedly mounted on one end of the inner wall of the instrument barrel, and the visual panel is made of tempered glass with a thickness of 5-8 mm.

[0020] The present invention is further configured such that a sealing member is provided between the mounting opening on the top of the tank body and the measuring frame, and the sealing member adopts a multi-layer rubber sealing ring structure.

[0021] The present invention is further configured such that the diameter of the sliding ball is 0.5-1 mm smaller than the groove width of the spiral guide groove, and the surfaces of the sliding ball and the spiral guide groove are plated with a polytetrafluoroethylene coating with a thickness of 0.1-0.3 mm.

[0022] Beneficial effects of the present invention:

[0023] 1. The present invention provides a mechanical water-coal slurry storage tank liquid level measuring device. When the liquid level in the water-coal slurry storage tank changes, the annular floating platform will rise or fall accordingly. The spiral fins on the inner wall of the annular floating platform cooperate with the spiral guide grooves on the outer wall of the guide rod. The connecting rod at the bottom of the spiral fin drives the sliding ball to roll along the spiral guide grooves. Since the spiral direction of the spiral guide grooves is the same as the spiral direction of the spiral fins, this spiral structure enables the annular floating platform to rise or fall. On the one hand, the spiral fins can effectively push away the settled coal particles to prevent them from getting stuck on the floating platform; on the other hand, the spiral motion can overcome the high viscosity resistance of the water-coal slurry, allowing the annular floating platform to move quickly and stably with the liquid level changes, avoiding measurement failure problems caused by sticking or slow rising, thereby realizing rapid measurement of the liquid level.

[0024] 2. The present invention provides a mechanical water-coal slurry storage tank level measuring device. The annular floating platform drives the counterweight frame to move. The mounting ring on the inner wall of the counterweight frame is connected to the rotating plate through a T-bar. When the counterweight frame moves, the T-bar slides in the movable groove of the rotating plate, driving the rotating plate to rotate around the fixed plate. The push-pull rod between the two rotating plates will move with the rotation of the rotating plate, thereby pushing the rack plate to perform linear motion along the slider and slide groove structure. Since the rack plate is meshed with the gear, the linear motion of the rack plate is converted into the rotational motion of the gear. The active magnetic block on one side of the gear is driven by the magnetic belt. The driven magnet on one side of the moving indicator needle rotates, causing the indicator needle to rotate. This transmission assembly, through the cooperation of components such as the T-bar, rotating plate, push-pull rod, rack plate and gear, can amplify the tiny displacement of the floating platform and accurately convert it into obvious rotation of the indicator needle. At the same time, the magnetic attraction component adopts non-contact magnetic transmission to avoid wear and error that may be caused by mechanical connection. The scale lines are printed with a fluorescent coating, and the end of the indicator needle is equipped with a reflective patch. Whether in bright or dim light conditions, the operator can clearly and accurately read the liquid level data.

[0025] 3. The present invention provides a mechanical water-coal slurry storage tank liquid level measuring device. Since a liquid through hole is provided at the bottom of the outer wall around the measuring frame, the water-coal slurry can flow smoothly into the measuring frame, and a filter screen made of stainless steel sintered mesh is installed at the liquid through hole. The pore size is 0.5-1mm, which can effectively filter out larger particles of precipitated coal particles. This can ensure that the liquid level in the measuring frame is consistent with the liquid level in the tank body, ensuring the accuracy of the measurement, and prevent precipitated coal particles from entering the measuring frame, avoiding the precipitated coal particles from affecting the normal operation of the transmission assembly and the floating platform, reducing failures caused by precipitated coal particles from the source, and ensuring that the device can work stably for a long time.

[0026] 4. The present invention provides a mechanical water-coal slurry storage tank liquid level measuring device. Since the surfaces of the annular floating platform, counterweight frame and transmission assembly are coated with a super-hydrophobic and super-oleophilic coating, the device can effectively prevent the high-viscosity water-coal slurry from adhering to the surfaces of various components, thereby reducing component failures caused by adhesion and reducing the frequency of cleaning and maintenance. In addition, the sliding ball and spiral guide groove are coated with a polytetrafluoroethylene coating with a thickness of 0.1-0.3mm, and other components use suitable materials and surface treatment processes, which enhance the corrosion resistance of the components, extend the service life of the device, and reduce the number of times that components need to be replaced due to damage, thereby effectively reducing maintenance costs.

[0027] 5. The present invention provides a mechanical water-coal slurry storage tank liquid level measuring device. Since the guide rod is fixedly installed in the middle of the top inner wall of the measuring frame, it can provide vertical guidance for the counterweight frame and the annular floating platform, ensuring that they can move smoothly in the vertical direction when the liquid level changes. The guide frames arranged on the inner walls on both sides of the measuring frame cooperate with the guide seat rotatably connected to one end of the T-bar, which can guide and limit the movement of the T-bar to prevent the T-bar from deviating during the movement. At the same time, the slider at the top of the inner wall at one end of the measuring frame and the slide groove on one side of the rack plate form a T-shaped structure, which guides and limits the linear motion of the rack plate to prevent the rack plate from shaking during movement. These guiding and limiting structures cooperate with each other to ensure that each component remains stable during movement, avoids deviation or shaking, and greatly improves the overall structural stability and reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a mechanical water-coal slurry storage tank liquid level measuring device.

[0030] Figure 2 It is a three-dimensional cross-sectional view of a mechanical water-coal slurry storage tank liquid level measuring device.

[0031] Figure 3 This is a schematic diagram of the installation port and sealing structure of a mechanical water-coal slurry storage tank liquid level measurement device.

[0032] Figure 4 The diagram is a schematic diagram of the measuring frame and scale line structure of a mechanical water-coal slurry storage tank level measuring device.

[0033] Figure 5 This is a cross-sectional view of the measurement frame of a mechanical water-coal slurry storage tank level measurement device.

[0034] Figure 6 This is a schematic diagram of the spiral guide groove and observation port structure of a mechanical water-coal slurry storage tank liquid level measurement device.

[0035] Figure 7 The figure is a schematic diagram of the transmission component structure of a mechanical water-coal slurry storage tank liquid level measuring device.

[0036] Figure 8 This is a schematic diagram of the counterweight frame and sliding ball structure of a mechanical water-coal slurry tank level measurement device.

[0037] Figure 9 A cross-sectional view of an annular floating platform of a mechanical water-coal slurry tank level measurement device.

[0038] Figure 10 The figure is a schematic diagram of the structure of the active magnetic block and the driven magnetic block of a mechanical water-coal slurry storage tank level measurement device.

[0039] In the picture:

[0040] 1. Tank body; 2. Measuring frame; 3. Instrument tube; 4. Guide rod; 5. Transmission assembly; 501. Mounting ring; 502. T-bar; 503. Movable groove; 504. Turn plate; 505. Fixed plate; 506. Push-pull rod; 507. Rack plate; 508. Gear; 509. Mounting shaft; 510. Active magnet; 511. Driven magnet; 6. Annular floating platform; 7. Filter; 8. Mounting port; 9. Seal; 10. Scale line; 11. Indicator needle; 12. Liquid port; 13. Guide frame; 14. Slider; 15. Spiral guide groove; 16. Observation port; 17. Guide seat; 18. Spiral fin; 19. Slide groove; 20. Slide ball; 21. Counterweight frame; 22. Connecting rod; 23. Visual panel. DETAILED DESCRIPTION

[0041] The technical solution of the present application will be further described in detail below in conjunction with specific implementation methods.

[0042] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0043] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] Example 1:

[0046] According to an embodiment of the present invention,

[0047] See also Figures 1 to 10 , a mechanical water-coal slurry storage tank liquid level measuring device, comprising:

[0048] The tank body 1 has a mounting opening 8 at its top, and a measuring frame 2 is fixedly mounted on the inner wall of the mounting opening 8. The bottom of the measuring frame 2 extends to the inner bottom of the tank body 1. A sealing member 9 is provided between the mounting opening 8 at the top of the tank body 1 and the measuring frame 2, and the sealing member 9 adopts a multi-layer rubber sealing ring structure;

[0049] Instrument barrel 3, one side of the measuring frame 2 is provided with an observation port 16 for fixing the instrument barrel 3, and an inner wall of one side of the measuring frame 2 is provided with a ring-shaped scale line 10, and the middle of the inner wall of one side of the measuring frame 2 is connected to an indicator needle 11 by a pin, and the position of the indicator needle 11 corresponds to the position of the scale line 10, the bottom of the middle of the outer wall of the measuring frame 2 is provided with a liquid port 12, and the liquid port 12 is installed with a filter 7, the filter 7 is made of stainless steel sintered mesh, and the pore size of the filter 7 is 0.5-1mm, the scale line 10 is printed with a fluorescent coating, and the end of the indicator needle 11 is provided with a reflective patch, and one end of the inner wall of the instrument barrel 3 is fixedly installed There is a visual panel 23, and the visual panel 23 is made of tempered glass with a thickness of 5-8mm. Since the bottom of the outer wall of the measuring frame 2 is provided with a liquid through-hole 12, the water-coal slurry can flow smoothly into the measuring frame 2. A filter screen 7 made of a stainless steel sintered mesh is installed at the liquid through-hole 12, which can effectively filter out larger particles of precipitated coal particles. This can not only ensure that the liquid level in the measuring frame 2 is consistent with the liquid level in the tank body 1, ensuring the accuracy of the measurement, but also prevent precipitated coal particles from entering the measuring frame 2, avoiding the precipitated coal particles from affecting the normal operation of the transmission component 5 and the annular floating platform 6, reducing failures caused by precipitated coal particles, and ensuring the long-term stable operation of the device.

[0050] The guide rod 4 is fixedly mounted on the middle of the top inner wall of the measuring frame 2, and the outer wall of the guide rod 4 is provided with an annular counterweight frame 21. The counterweight frame 21 is a hollow frame structure, and the outer wall of the counterweight frame 21 is fixedly mounted with an annular floating platform 6;

[0051] The transmission assembly 5 is arranged between the outer wall of the counterweight frame 21 and the inner wall of the measuring frame 2, and is used to drive the indicator needle 11 to rotate. The transmission assembly 5 includes two fixed plates 505 fixed to the inner wall of one side of the measuring frame 2, and one end of the two fixed plates 505 is rotatably connected to a rotating plate 504 through a pin shaft. A movable groove 503 is provided on the rotating plate 504. The inner wall of the counterweight frame 21 is rotatably connected to a mounting ring 501 through a sealed bearing, and both ends of the mounting ring 501 are rotatably connected to a T-bar 502 through a pin shaft. The T-bar 502 passes through the interior of the movable groove 503. The two rotating plates 504 are rotatably connected through a pin shaft. A push-pull rod 506 is connected, and the top of the push-pull rod 506 is rotatably connected to a rack plate 507 through a pin shaft. The inner wall of the other side of the measuring frame 2 is rotatably connected to a mounting shaft 509 through a bearing, and a gear 508 is fixedly installed on the outer wall of the mounting shaft 509. The gear 508 is meshed with the rack plate 507. A magnetic attraction component is provided between the gear 508 and the indicator needle 11. The magnetic attraction component includes an active magnetic block 510 fixedly mounted on one side of the gear 508, and a driven magnetic block 511 is fixedly mounted on one side of the indicator needle 11. The position of the driven magnetic block 511 corresponds to the position of the active magnetic block 510. The active magnetic block 510 and the driven magnetic block 511 are fixedly mounted on the side of the indicator needle 11. The magnetic blocks 511 are all neodymium iron boron permanent magnets and are symmetrically distributed on both sides of the end of the non-magnetic instrument tube 3. The spacing between the active magnetic block 510 and the driven magnetic block 511 is 5-10mm. When the annular floating platform 6 rises and falls, it will drive the counterweight frame 21 to move, and the T-bar 502 will slide in the movable groove 503 of the rotating plate 504, driving the rotating plate 504 to rotate around the fixed plate 505. The push-pull rod 506 between the two rotating plates 504 will move with the rotation of the rotating plate 504, thereby pushing the rack plate 507 to make a linear motion along the slider 14 and the slide groove 19 structure. Since the rack plate 507 is engaged with the gear 508, The linear motion of the rack plate 507 is converted into the rotational motion of the gear 508, so that the active magnet 510 drives the driven magnet 511 on one side of the indicator needle 11 to rotate through magnetic force, thereby rotating the indicator needle 11. The tiny displacement of the annular floating platform 6 can be amplified and accurately converted into obvious rotation of the indicator needle 11. At the same time, the magnetic attraction component adopts non-contact magnetic transmission to avoid wear and error that may be caused by mechanical connection. The scale line 10 is printed with a fluorescent coating, and the end of the indicator needle 11 is provided with a reflective patch. Whether in bright or dim light conditions, the operator can clearly and accurately read the liquid level data.

[0052] The inner wall of the annular floating platform 6 is fixed with a spiral fin 18, and the bottom of the spiral fin 18 is fixed with a connecting rod 22 with an equal distance and a spiral distribution. One end of the connecting rod 22 is rotatably provided with a sliding ball 20. The outer wall of the guide rod 4 is provided with a spiral guide groove 15, and the sliding ball 20 is rolled on the inner wall of the spiral guide groove 15. The spiral direction of the spiral guide groove 15 is the same as the spiral direction of the spiral fin 18. The diameter of the sliding ball 20 is 0.5-1mm smaller than the groove width of the spiral guide groove 15, and the surface of the sliding ball 20 and the surface of the spiral guide groove 15 are coated with a polytetrafluoroethylene coating with a thickness of 0.1-0.3mm. When the liquid level in the water-coal slurry storage tank changes When the annular floating platform 6 rises or falls accordingly, the spiral fins 18 and the spiral guide grooves 15 cooperate with each other, so that the annular floating platform 6 can effectively push away the settled coal particles during the rising or falling process to prevent them from getting stuck on the floating platform. This spiral motion can overcome the high viscosity resistance of the water-coal slurry, allowing the annular floating platform 6 to move quickly and stably with the change of liquid level, avoiding measurement failure problems caused by sticking or slow rising, thereby realizing rapid measurement of the liquid level. The polytetrafluoroethylene coating enhances the corrosion resistance of the components, prolongs the service life of the device, reduces the number of times that components need to be replaced due to damage, and effectively reduces maintenance costs.

[0053] In the present invention, a slider 14 is fixedly installed on the top of the inner wall of one end of the measuring frame 2, and a slide groove 19 for inserting the slider 14 is opened on one side of the rack plate 507. The cross-section of the slide groove 19 and the cross-section of the slider 14 are designed to be T-shaped. Through the cooperation of the slider 14 and the slide groove 19, the linear motion of the rack plate 507 can be guided and limited, thereby preventing the rack plate 507 from shaking during movement, thereby improving the structural stability and reliability of the transmission assembly 5.

[0054] In the present invention, a guide frame 13 is fixedly installed in the middle of the inner walls on both sides of the measuring frame 2, and the middle of one end of the two T-bars 502 are rotatably connected to a guide seat 17 inserted in the guide frame 13. The guiding action of the guide seat 17 and the guide frame 13 can guide and limit the movement of the T-bar 502, preventing the T-bar 502 and the counterweight frame 21 from deviating during the movement.

[0055] Example 2:

[0056] See also Figure 8 and Figure 9 Compared with the first embodiment, the top and bottom surfaces of the annular floating platform 6 of this embodiment are both configured to be pointed, and the surface of the annular floating platform 6, the surface of the counterweight frame 21 and the surface of the transmission component 5 are coated with a super-hydrophobic and super-oleophilic coating. The super-hydrophobic and super-oleophilic coating can effectively prevent the high-viscosity water-coal slurry from adhering to the surfaces of various components, thereby reducing component failures caused by adhesion and reducing the frequency of cleaning and maintenance.

[0057] To sum up, the working principle of the present invention is as follows: the water-coal slurry in the storage tank flows into the interior of the measuring frame 2 through the liquid openings 12 around the bottom of the measuring frame 2 under the filtering action of the filter screen 7, so that the liquid level in the measuring frame 2 is always consistent with the liquid level in the storage tank. Since the annular floating platform 6 is mounted on the guide rod 4 through the counterweight frame 21 fixed on its inner wall, when the liquid level in the storage tank changes, the annular floating platform 6 rises or falls accordingly under the action of buoyancy. At this time, the spiral fins 18 on the inner wall of the annular floating platform 6 drive the connecting rods 22 with equal distances spirally distributed on the bottom, thereby causing the sliding ball 20 rotatably arranged at one end of the connecting rod 22 to roll along the spiral guide groove 15 on the outer wall of the guide rod 4. Since the spiral guide groove 15 has the same spiral direction as the spiral fins 18, this spiral motion can not only use the spiral fins 18 to push away the settled coal particles to prevent jamming, but also effectively overcome the high viscosity resistance of the water-coal slurry to achieve fast and stable displacement.

[0058] During the movement of the counterweight frame 21, it can drive the transmission assembly 5 to work synchronously, that is, it drives the mounting ring 501 connected to its inner wall through a sealed bearing to move, and the T-bars 502 at both ends of the mounting ring 501 slide in the movable groove 503 of the rotating plate 504, thereby pushing the rotating plate 504 to rotate around the fixed plate 505. The rotating plates 504 on both sides are linked by the push-pull rods 506 to convert the movement of the T-bar 502 into the linear motion of the push-pull rods 506, and then drive the rack plate 507 connected to the top of the push-pull rod 506 to make a linear motion along the T-shaped guide structure composed of the slider 14 on the inner wall of one end of the measuring frame 2 and the rack plate 507 groove 19. The rack plate 507 is connected to the other side of the measuring frame 2 through a bearing. The gear 508 on the mounting shaft 509 on the inner wall meshes, converting the linear displacement of the rack plate 507 into rotational motion of the gear 508. At this time, the active magnet 510 on one side of the gear 508 drives the driven magnet 511 on the side of the indicator needle 11 to rotate in a non-contact manner through magnetic force, thereby causing the indicator needle 11 to rotate around its pin connected to the inner wall of the measuring frame 2. The indicator needle 11 corresponds to the annular scale line 10 provided on the inner wall of one side of the measuring frame 2. The operator can clearly read the liquid level value through the visual plate 23 in the instrument barrel 3. In addition, the guide frames 13 on the inner walls of both sides of the measuring frame 2 cooperate with the guide seat 17 rotatably connected to one end of the T-bar 502, and the structure of the slider 14 and the slide groove 19 ensure the stability of the movement of each component.

[0059] Since the surfaces of the annular floating platform 6, the counterweight frame 21 and the transmission assembly 5 are provided with super-hydrophobic and super-oleophilic coatings, the sliding ball 20 and the spiral guide groove 15 are coated with polytetrafluoroethylene, and the multi-layer rubber sealing ring between the mounting port 8 and the measuring frame 2 is designed, the long-term reliable operation of the device is ensured from the aspects of anti-adhesion, anti-corrosion and sealing.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mechanical water-coal slurry tank level measuring device, characterized in that: include: The tank body (1) has a mounting opening (8) on its top, and a measuring frame (2) is fixedly mounted on the inner wall of the mounting opening (8), wherein the bottom of the measuring frame (2) extends to the inner bottom of the tank body (1); An instrument barrel (3), an observation port (16) for fixing the instrument barrel (3) is provided on one side of the measuring frame (2), and an annular scale line (10) is provided on the inner wall of one side of the measuring frame (2), an indicator needle (11) is rotatably connected to the middle of the inner wall of one side of the measuring frame (2) via a pin, and the position of the indicator needle (11) corresponds to the position of the scale line (10); A guide rod (4) is fixedly mounted at the middle of the top inner wall of the measuring frame (2), and an annular counterweight frame (21) is sleeved on the outer wall of the guide rod (4). The counterweight frame (21) is a hollow frame structure, and an annular floating platform (6) is fixedly mounted on the outer wall of the counterweight frame (21); A transmission assembly (5) is provided between the outer wall of the counterweight frame (21) and the inner wall of the measuring frame (2), and is used to drive the indicator needle (11) to rotate. The transmission assembly (5) includes two fixed plates (505) fixed to the inner wall of one side of the measuring frame (2), and one end of each of the two fixed plates (505) is rotatably connected to a rotating plate (504) via a pin shaft, and each rotating plate (504) is provided with a movable groove (503). The inner wall of the counterweight frame (21) is rotatably connected to a mounting ring (501) via a sealed bearing, and both ends of the mounting ring (501) are rotatably connected via a pin shaft. A T-shaped rod (502) is connected, and the T-shaped rod (502) passes through the inside of the movable groove (503). A push-pull rod (506) is rotatably connected between the two rotating plates (504) through a pin shaft, and the top of the push-pull rod (506) is rotatably connected to a rack plate (507) through a pin shaft. The inner wall of the other side of the measuring frame (2) is rotatably connected to a mounting shaft (509) through a bearing, and a gear (508) is fixedly installed on the outer wall of the mounting shaft (509), and the gear (508) is meshed with the rack plate (507). A magnetic attraction component is provided between the gear (508) and the indicator needle (11); The inner wall of the annular floating platform (6) is fixedly mounted with a spiral fin (18), and the bottom of the spiral fin (18) is fixed with a connecting rod (22) that is equidistantly distributed in a spiral manner, and a sliding ball (20) is rotatably arranged at one end of the connecting rod (22). The outer wall of the guide rod (4) is provided with a spiral guide groove (15), and the sliding ball (20) is rollingly arranged on the inner wall of the spiral guide groove (15), and the spiral direction of the spiral guide groove (15) is the same as the spiral direction of the spiral fin (18).

2. A mechanical water-coal slurry tank liquid level measuring device according to claim 1, characterized in that: The bottom of the middle of the outer wall of each of the four sides of the measuring frame (2) is provided with a liquid opening (12), and a filter (7) is installed at each of the liquid openings (12). The filter (7) is made of a stainless steel sintered mesh, and the pore size of the filter (7) is 0.5-1 mm.

3. A mechanical water-coal slurry tank liquid level measuring device according to claim 2, characterized in that: The magnetic attraction assembly includes an active magnetic block (510) fixedly mounted on one side of the gear (508), and a driven magnetic block (511) fixedly mounted on one side of the indicator needle (11), the position of the driven magnetic block (511) corresponding to the position of the active magnetic block (510), the active magnetic block (510) and the driven magnetic block (511) are both neodymium iron boron permanent magnets, and are symmetrically distributed on both sides of the end of the non-magnetic instrument barrel (3), and the spacing between the active magnetic block (510) and the driven magnetic block (511) is 5-10 mm.

4. A mechanical water-coal slurry tank liquid level measuring device according to claim 3, characterized in that: A slider (14) is fixedly mounted on the top of the inner wall of one end of the measuring frame (2), and a chute (19) for inserting the slider (14) is provided on one side of the rack plate (507), and the cross section of the chute (19) and the cross section of the slider (14) are designed to be T-shaped.

5. A mechanical water-coal slurry tank liquid level measuring device according to claim 4, characterized in that: A guide frame (13) is fixedly mounted in the middle of the inner walls on both sides of the measuring frame (2), and a guide seat (17) inserted into the guide frame (13) is rotatably connected in the middle of one end of each of the two T-shaped rods (502).

6. The mechanical water-coal slurry tank level measuring device according to claim 5, characterized in that: The top and bottom surfaces of the annular floating platform (6) are both configured to be pointed, and the surface of the annular floating platform (6), the surface of the counterweight frame (21), and the surface of the transmission component (5) are all coated with a super-hydrophobic and super-oleophilic coating.

7. The mechanical water-coal slurry tank level measuring device according to claim 6, characterized in that: The scale lines (10) are printed with a fluorescent coating, a reflective patch is provided at the end of the indicator needle (11), and a visual panel (23) is fixedly mounted on one end of the inner wall of the instrument barrel (3), and the visual panel (23) is made of tempered glass with a thickness of 5-8 mm.

8. The mechanical water-coal slurry tank level measuring device according to claim 7, characterized in that: A sealing member (9) is provided between the mounting opening (8) at the top of the tank body (1) and the measuring frame (2), and the sealing member (9) adopts a multi-layer rubber sealing ring structure.

9. The mechanical water-coal slurry tank liquid level measuring device according to claim 8, characterized in that: The diameter of the sliding ball (20) is 0.5-1 mm smaller than the groove width of the spiral guide groove (15), and the surface of the sliding ball (20) and the surface of the spiral guide groove (15) are plated with a polytetrafluoroethylene coating with a thickness of 0.1-0.3 mm.

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