Liquid adding device for fly ash detection

Abstract

The utility model discloses a liquid adding device for fly ash detection, which relates to the technical field of coal power generation and comprises a bearing unit, a liquid adding unit and a liquid adding unit. And the dripping condensation unit is used for dropwise adding a certain amount of warm water to the fly ash in the extrusion groove at a short distance, so that the fly ash is condensed, and a plurality of dropwise adding points are arranged according to the shape of the extrusion groove for simultaneous dropwise adding. And the dripping condensation unit is arranged, and the fly ash is wetted by adopting a multi-point close-distance warm water dripping manner, so that the bonding strength among fly ash particles is improved, the fly ash extruded into blocks is more stable, cracks and dripping pits are not easy to generate, and the detection precision of a subsequent Libs detection probe is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal power generation technical field, especially a liquid adding device for fly ash detection. BACKGROUND

[0002] With the further promotion of energy saving and emission reduction development strategy, in September 2014, the State Development and Reform Commission, environmental protection department and the State Energy Bureau jointly issued the coal energy saving and emission reduction upgrading and reconstruction action plan (2014-2020) clearly proposed that in view of the severe situation faced by the energy saving and consumption reduction of the current thermal power unit, the average power supply coal consumption of the transformed coal-fired generating unit in our country should be less than 310g / kwh by 2020. How to detect the composition of coal according to the composition data, do the combustion optimization control adjustment, ensure the best wind coal ratio, coal water ratio and work coal ratio, so as to improve the combustion efficiency of the boiler, energy saving and emission reduction is the current urgent problem to be solved.

[0003] The present company generally detects the content of fly ash composition (for example, unburned carbon, sulfur, nitrogen and other elements) after coal combustion, and adjusts and optimizes the operation parameters of the boiler according to the obtained composition data, which is of great significance to improve the utilization efficiency of coal and realize the overall optimization operation of the thermal power unit. When the company detects the content of fly ash composition, the fly ash automatic collector (mainly including negative pressure collector, collecting with discharge pipe) generates suction through negative pressure to collect the fly ash of the boiler into the collecting box. After sampling, the fly ash in the collecting box needs to be discharged to the bearing plate with extrusion groove manually. After the fly ash on the bearing plate is scraped off manually, the bearing plate is placed on the extrusion equipment for extrusion, so that the fly ash is compacted into sheet-shaped block. Finally, the bearing plate is placed on the rotating platform below the Libs detection probe, and the composition of the fly ash on the low-speed rotating bearing plate is detected by the Libs detection probe. After detection, the data is recorded, and the fly ash on the bearing plate is poured out. Since the fly ash is directly extruded, the bonding strength between the fly ash is relatively low, and the compacted fly ash is easy to crack due to slight vibration, which will affect the detection accuracy of the Libs detection probe. Therefore, the application provides a liquid adding device for fly ash detection to meet the needs. UTILITY MODEL CONTENT

[0004] The purpose of the application is to provide a liquid adding device for fly ash detection to solve the technical problem that the compacted fly ash is easy to crack due to slight vibration in the adsorption technology.

[0005] To achieve the above purpose, the application provides the following technical scheme: a liquid adding device for fly ash detection,

[0006] The bearing unit is used for bearing fly ash, and the fly ash is filled in the extrusion groove arranged on the bearing unit;

[0007] The water drop condensation unit is used for closely dropping a certain amount of warm water on the fly ash in the extrusion groove, so that the fly ash is condensed, and multiple drop points are arranged according to the shape of the extrusion groove to simultaneously drop.

[0008] As a preferred embodiment in the embodiment, the bearing unit comprises a sliding rail mounted on a bottom plate, a sliding block arranged on the sliding rail, and a mounting plate fixed to the upper end of the sliding block, wherein a bearing plate is arranged on the mounting plate, and the extrusion groove is arranged at the shaft center of the bearing plate.

[0009] The drip water condensation unit comprises a drip adding cylinder which is installed on a U-shaped frame and is closed at both upper and lower ends, the drip adding cylinder is made of heat insulation material, the bottom of the drip adding cylinder is densely provided with needle tubes which are communicated with the inner cavity of the drip adding cylinder, the outer wall of the drip adding cylinder is provided with a liquid inlet pipe with a liquid inlet one-way valve, the liquid inlet pipe is connected with a water storage tank through a connecting pipeline, the inner cavity of the drip adding cylinder is fixedly provided with a lower heat conducting plate, the lower heat conducting plate is provided with a liquid outlet pipe with a liquid outlet one-way valve, an upper heat insulation plate is sealingly and slidably arranged above the lower heat conducting plate, an electric heater is arranged between the upper heat insulation plate and the lower heat conducting plate, a heat insulation stand is fixedly arranged at the upper end of the upper heat insulation plate and sealingly and slidably arranged in the inner cavity of a heat insulation cylinder, the upper end of the heat insulation cylinder is sealed by a first heat conducting plate, the upper end of the heat insulation cylinder is rotatably provided with a heat insulation baffle through a pin shaft, the upper end of the pin shaft is fixedly provided with a first gear, the upper end of the upper heat insulation plate is fixedly provided with a heat insulation cover, the inner cavity of the heat insulation cover is sealed by a second heat conducting plate at the bottom, the inner cavity of the heat insulation cover is provided with a low-boiling-point liquid, the upper end of the heat insulation cover is sealingly and movably provided with a heat insulation pipe, the upper end of the heat insulation pipe is communicated with the inner cavity of the heat insulation cylinder, the upper end of the upper heat insulation plate is provided with a recess, a heat insulation turntable is rotatably arranged in the recess, a third heat conducting plate which is matched with the second heat conducting plate is arranged in the through hole inner cavity of the heat insulation turntable, a fourth heat conducting plate is arranged in the through hole bottom of the recess, the fourth heat conducting plate is located directly below the second heat conducting plate and has the same size, an extension rod is fixedly arranged at the upper end shaft of the heat insulation turntable, the upper end of the extension rod is rotatably connected with the drip adding cylinder, the upper end of the extension rod is fixedly provided with a second gear, a driving unit is installed on the U-shaped frame, the driving unit comprises an upper cylinder and a lower cylinder which are arranged in a vertical mode on the U-shaped frame, the inner cavities of the upper cylinder and the lower cylinder are connected through a connecting pipe, a first movable rod is sealingly and movably arranged in the inner cavity of the lower cylinder, a scalene triangle extrusion block is fixedly arranged at the outer end of the U-shaped frame through the first movable rod, a scalene trapezoidal structure contact block which is matched with the scalene triangle extrusion block is fixedly arranged at the side end of the mounting plate, a second movable rod is sealingly and movably arranged in the inner cavity of the upper cylinder, a back-shaped frame is fixedly arranged at the outer end of the U-shaped frame through the second movable rod, driving teeth are arranged on both inner walls of the back-shaped frame, the driving teeth on both sides are respectively in gear connection with the first gear and the second gear, a limiting rod is arranged at the side end of the back-shaped frame and is slidingly connected with the U-shaped frame, an installation ring is fixedly arranged on the second movable rod, a return spring is fixedly arranged between the installation ring and the U-shaped frame and around the second movable rod, in the initial state, the heat insulation baffle does not form a sealing block to the upper end of the first heat conducting plate, and the third heat conducting plate is not located directly below the second heat conducting plate.

[0010] As a preferred embodiment in the embodiment, the lower end of the needle tube is spaced apart from the fly ash, and the spacing is not higher than the length of a drop of liquid just about to separate from the needle tube.

[0011] As a preferred embodiment in the embodiment, the two ends of the slide rail are fixed with baffle plates.

[0012] As a preferred embodiment in the embodiment, the bottom of the bearing plate is fixed with a support column, and the upper end of the mounting plate is provided with a socket matched with the support column.

[0013] In summary, the technical effects and advantages of the utility model are as follows:

[0014] The utility model discloses a reasonable structure, set up drop condensation unit, and adopt the way of multi-point close-range drop of warm water to carry out the wetting of fly ash, improve the combination strength between fly ash particles, make the fly ash after extruding into block more stable, and it is not easy to produce crack and drop pit, improve the detection precision of subsequent Libs detection probe. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the present application or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, and obviously, the drawing in the following description is only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is Figure 1 It is a structure schematic diagram of drop condensation unit in the middle;

[0018] Figure 3 It is Figure 2 It is an enlarged structure schematic diagram of A and B in the middle;

[0019] Figure 4 It is a sectional structure schematic diagram of through drop adding cylinder in 2;

[0020] Figure 5 It is Figure 4 It is a top view structure schematic diagram of heat insulation rotary table in the middle.

[0021] In the figure: 1, bottom plate; 2, slide rail; 3, sliding block; 4, water drop condensation unit; 41, third heat conduction plate; 42, electric heater; 43, liquid outlet pipe; 44, needle tube; 45, contact block; 46, lower cylinder; 47, upper cylinder; 48, first movable rod; 49, isosceles triangle extrusion block; 410, through column; 411, second movable rod; 412, reset spring; 413, mounting ring; 414, liquid inlet pipe; 415, first heat conduction plate; 416, drop adding cylinder; 417, back-shaped frame; 418, heat insulation shutter; 419, limiting rod; 420, first gear; 421, telescopic rod; 422, second gear; 423, heat insulation cover; 424, heat insulation turntable; 425, upper heat insulation plate; 426, lower heat conduction plate; 427, heat insulation stand; 428, heat insulation cylinder; 429, second heat conduction plate; 430, heat insulation pipe; 431, fourth heat conduction plate; 5, mounting plate; 6, bearing plate; 7, extrusion groove; 8, support column; 9, baffle. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Embodiment: Reference Figure 1 The bearing unit and the water drop condensation unit 4 shown in the figure,

[0024] The bearing unit: for bearing fly ash, the fly ash body is filled in the extrusion groove 7 provided thereon;

[0025] The water drop condensation unit 4: a certain amount of warm water is added to the fly ash in the extrusion groove 7 at a close distance, so that the fly ash is condensed, and multiple drop points are arranged according to the shape of the extrusion groove 7 to drop at the same time.

[0026] As a preferred embodiment in the present embodiment, as shown in the figure, Figures 1-5 The bearing unit includes a slide rail 2 mounted on the bottom plate 1, the slide rail 2 is provided with a sliding block 3, and the upper end of the sliding block 3 is fixed with a mounting plate 5, the mounting plate 5 is provided with a bearing plate 6, and the extrusion groove 7 is arranged at the axis of the bearing plate 6;

[0027] The dripping condensation unit 4 comprises a dripping cylinder 416 installed on the U-shaped frame and closed at both upper and lower ends, the dripping cylinder 416 is made of heat insulation material, the bottom of the dripping cylinder 416 is densely provided with needle tubes 44 communicating with the inner cavity of the dripping cylinder 416, the outer wall of the dripping cylinder 416 is provided with a liquid inlet pipe 414 with a liquid inlet one-way valve, the liquid inlet pipe 414 is connected with the water storage tank through a connecting pipe, the inner cavity of the dripping cylinder 416 is fixedly provided with a lower heat conducting plate 426, the lower heat conducting plate 426 is provided with a liquid outlet pipe 43 with a liquid outlet one-way valve, the upper side of the lower heat conducting plate 426 is sealingly and slidably provided with an upper heat insulation plate 425, the upper heat insulation plate 425 and the lower heat conducting plate 426 are provided with an electric heater 42, the upper end of the upper heat insulation plate 425 is fixedly provided with a heat insulation column 427, the upper end of the heat insulation column 427 is sealingly and slidably arranged in the inner cavity of a heat insulation cylinder 428, the upper end of the heat insulation cylinder 428 is sealingly provided with a first heat conducting plate 415, the upper end of the heat insulation cylinder 428 is rotatably provided with a heat insulation cover plate 418 through a pin shaft, the upper end of the pin shaft is fixedly provided with a first gear 420, the upper end of the upper heat insulation plate 425 is fixedly provided with a heat insulation cover 423, the inner cavity of the heat insulation cover 423 is sealingly provided with a second heat conducting plate 429 at the bottom, the inner cavity of the heat insulation cover 423 is provided with a low-boiling-point liquid, the upper end of the heat insulation cover 423 is sealingly and movably provided with a heat insulation pipe 430, the upper end of the heat insulation pipe 430 communicates with the inner cavity of the heat insulation cylinder 428, the upper end of the upper heat insulation plate 425 is provided with a groove, the groove is rotatably provided with a heat insulation turntable 424, the through hole inner cavity of the heat insulation turntable 424 is provided with a third heat conducting plate 41 matched with the second heat conducting plate 429, the fourth heat conducting plate 431 is arranged in the through hole at the bottom of the groove and is consistent in size with the second heat conducting plate 429, the upper end of the heat insulation turntable 424 is fixedly provided with an extension rod 421, the upper end of the extension rod 421 is rotatably connected with the dripping cylinder 416, the upper end of the extension rod 421 is fixedly provided with a second gear 422, the driving unit is installed on the U-shaped frame, the driving unit comprises an upper cylinder 47 and a lower cylinder 46 arranged in a vertical manner on the U-shaped frame, the inner cavities of the upper cylinder 47 and the lower cylinder 46 are connected through a connecting pipe, the inner cavity of the lower cylinder 46 is sealingly and movably provided with a first movable rod 48, the outer end of the first movable rod 48 penetrating through the U-shaped frame is fixedly provided with an isosceles triangular extrusion block 49, the side end of the mounting plate 5 is fixedly provided with a contact block 45 in the shape of an isosceles trapezoid matched with the isosceles triangular extrusion block 49, the inner cavity of the upper cylinder 47 is sealingly and movably provided with a second movable rod 411, the outer end of the second movable rod 411 penetrating through the U-shaped frame is fixedly provided with a U-shaped frame 417, the two inner walls of the U-shaped frame 417 are provided with driving teeth, the driving teeth on the two sides are respectively in gear connection with the first gear 420 and the second gear 422, the side end of the U-shaped frame 417 is provided with a limiting rod 419, the limiting rod 419 is slidably connected with the U-shaped frame, the second movable rod 411 is fixedly provided with a mounting ring 413, a return spring 412 is fixedly arranged between the mounting ring 413 and the U-shaped frame and surrounds the second movable rod 411, in the initial state,The heat-insulating shield 418 does not form a sealed shield to the upper end of the first heat-conducting plate 415, and the third heat-conducting plate 41 is not directly below the second heat-conducting plate 429.

[0028] By moving the installation plate 5 to make the fly ash move to the drop cylinder 416 directly below, in the process, the slope of the contact block 45 will be extruded with the slope of the isosceles triangular extrusion block 49, the extruded isosceles triangular extrusion block 49 will drive the first movable rod 48 to move towards the inner cavity of the lower cylinder 46, and finally make the narrow end of the isosceles triangular extrusion block 49 resist the flat end of the contact block 45, and in the process, since the inner cavities of the lower cylinder 46 and the upper cylinder 47 are communicated, the extruded gas in the lower cylinder 46 will make the second movable rod 411 drive the meandering frame 417 to move outward, the first gear 420 and the second gear 422 are driven by the driving gear belt to rotate, and the heat-shielding shutter 418 completely covers the upper end of the heat-shielding cylinder 428 to form a shielding seal, and at this time the third heat-conducting plate 41 on the heat-shielding turntable 424 is in contact with the second heat-conducting plate 429 and the fourth heat-conducting plate 431 respectively, the electric heater 42 in the drop cylinder 416 heats the internal drop liquid to a certain stable state in advance and stops heating (that is, the water body is heated in advance before the drop liquid), at this time the heat can be transmitted through the fourth heat-conducting plate 431, the third heat-conducting plate 41 and the second heat-conducting plate 429 to the low-boiling-point liquid, at this time the low-boiling-point liquid absorbs heat and vaporizes, the air pressure in the heat-shielding cylinder 428 increases, and then the heat-shielding column 427 drives the upper heat-shielding plate 425 to slide downward, so that the drop water between the upper heat-shielding plate 425 and the lower heat-conducting plate 426 is extruded and sent to the needle tube 44 below through the liquid outlet check valve, the slow downward movement of the upper heat-shielding plate 425 driven by the air pressure generated by the vaporization of the low-boiling-point liquid can make the drop water drop from the liquid outlet end of the needle tube 44 drop by drop, the amount of low-boiling-point liquid in the heat-shielding cover 423 is controlled, and then the descending distance of the upper heat-shielding plate 425 is controlled, finally the liquid drop amount of the fly ash is controlled, and after the liquid drop is completed, the bearing plate 6 is moved out of this area, in the moving process, the contact block 45 is separated from the isosceles triangular extrusion block 46, at this time the first movable rod 48, the second movable rod 411, the meandering frame 417, the heat-shielding shutter 418 and the heat-shielding turntable 424 can be restored to the original position by the reset spring 412, that is, the heat-shielding shutter 418 does not form a shielding to the upper end of the heat-shielding cylinder 428, at this time the first heat-conducting plate 415 is used to heat the gas in the heat-shielding cylinder 428, so that the gas in the heat-shielding cylinder 428 is liquefied, the air pressure in the heat-shielding cylinder 428 decreases and returns to the original air pressure, which makes the upper heat-shielding plate 425 move upward and return to the original position, and at the same time, in the process of the upward movement of the upper heat-shielding plate 425, water is supplied to the drop cylinder 416 through the liquid inlet check valve to maintain the water level in the drop cylinder 416, the thickness of the extrusion groove 82 is generally set to 3-5mm (which is also the thickness of the fly ash), which can directly extrude the fly ash, and the bonding strength between the fly ash is relatively low, the compacted fly ash is easy to crack due to slight vibration, which will affect the detection accuracy of the Libs detection probe, therefore, the water condensation unit 4 is provided to wet the fly ash by adding water to the fly ash,The water can play a role of adhesion, improve the bonding strength between fly ash particles, make the fly ash after extrusion more stable, not easy to produce cracks, and adopt the dropping method (since the thickness of the fly ash is thin, the fly ash at the bottom can be infiltrated through water penetration), which is beneficial to control the amount of water added, and the water droplets can be dropped from a short distance to avoid the fly ash splashing and producing large drop pits (large drop pits are easy to cause the surface of the block after subsequent extrusion to be in a pit-perfect pit-wavy shape, which affects the detection accuracy of the Libs detection probe), and multiple dropping points can speed up the speed of the fly ash being fully infiltrated, and the water with a certain temperature (the temperature is controlled at 45 to 50°, to avoid high-temperature water damaging the structure of fly ash molecules, reducing the activity and function of fly ash, and high-temperature water wetting fly ash is easy to produce clumping, which affects the stability and operability of the fly ash after extrusion), and the water is dropped, since water has heat, and water molecules move faster, which can speed up the water penetration and infiltration of the fly ash.

[0029] It should be noted that, first, the through column 410 penetrates the U-shaped frame, which is to ensure the stable linear motion of the first movable rod 48; second, the gas pressure generated by the vaporization of the low-boiling-point liquid is used as power to drop the liquid into the fly ash, the size of the heat conduction area can be controlled to make the low-boiling-point liquid vaporize slowly, and then the needle tube drops water slowly (the low-boiling-point liquid has good slow control effect), so as to avoid giving the water droplets a large initial speed, and then slow down the impact of the water droplets on the fly ash, to avoid producing large drop pits; third, the upper end of the water storage tank is provided with an opening communicating with the outside, which is beneficial to the smooth absorption of water into the dropping cylinder 416 for water replenishment; fourth, multiple dropping points are provided, each liquid droplet has a certain area of penetration area, and multiple dropping points are provided to cover all the fly ash; fifth, when the electric heater 42 is used to heat the water in the dropping cylinder 416, the gas pressure between the upper heat insulation plate 425 and the lower heat conduction plate 426 will be slightly larger, but it cannot make the blocking head in the outlet check valve be opened, and the needle tube 44 has no obvious liquid overflow; sixth, since the lower end of the heat insulation pipe 430 is sealingly and slidably connected with the heat insulation cover 423, and the telescopic rod 421 can move up and down, the upper heat insulation plate 425 can drive the heat insulation cover 423 to move up or down.

[0030] As a preferred embodiment in the present embodiment, a spacing is provided between the lower end of the needle tube 44 and the fly ash, and the spacing is not higher than the length of a liquid droplet just about to separate from the needle tube 44.

[0031] The water can play a role of adhesion, improve the bonding strength between fly ash particles, make the fly ash after extrusion more stable, not easy to produce cracks, and adopt the dropping method (since the thickness of the fly ash is thin, the fly ash at the bottom can be infiltrated through water penetration), which is beneficial to control the amount of water added, and the water droplets can be dropped from a short distance to avoid the fly ash splashing and producing large drop pits (large drop pits are easy to cause the surface of the block after subsequent extrusion to be in a pit-perfect pit-wavy shape, which affects the detection accuracy of the Libs detection probe), and multiple dropping points can speed up the speed of the fly ash being fully infiltrated, and the water with a certain temperature (the temperature is controlled at 45 to 50°, to avoid high-temperature water damaging the structure of fly ash molecules, reducing the activity and function of fly ash, and high-temperature water wetting fly ash is easy to produce clumping, which affects the stability and operability of the fly ash after extrusion), and the water is dropped, since water has heat, and water molecules move faster, which can speed up the water penetration and infiltration of the fly ash.

[0032] As a preferred embodiment in the present embodiment,Figure 1 As shown, the both ends of the slide rail 2 are fixed with the baffle 9, when the end of the sliding block 3 contacts with the baffle 9, at this time the narrow end of the isosceles triangle extrusion block 49 just touches the plane end of the contact block 45, preventing the bearing plate 6 from moving too much, causing the extrusion groove 7 and the dropping cylinder 416 to be misaligned, which is easy to cause leakage.

[0033] As a preferred embodiment in the present embodiment, as shown in the drawings, Figure 1 As shown, the bottom of the bearing plate 6 is fixed with the support column 8, the upper end of the mounting plate 5 is provided with the insertion hole matched with the support column 8, facilitating the disassembly and assembly of the bearing plate 6 and the mounting plate 5, after the fly ash droplet is finished, the bearing plate 6 can be directly lifted and moved to the extrusion area for next operation.

[0034] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A liquid dosing device for fly ash detection, characterized in that: It includes a bearing unit and a drip condensation unit (4). Bearing unit: used to receive fly ash, the fly ash body is filled in the extrusion groove (7) provided on it; Water condensation unit (4): A certain amount of warm water is dripped onto the fly ash in the extrusion groove (7) at close range, so that the fly ash condenses. Multiple dripping points are set according to the shape of the extrusion groove (7) to drip simultaneously.

2. The liquid dosing device for fly ash detection according to claim 1, characterized in that: The bearing unit includes a slide rail (2) mounted on a base plate (1), a slider (3) is provided on the slide rail (2), and a mounting plate (5) is fixed to the upper end of the slider (3). A bearing plate (6) is provided on the mounting plate (5), and the extrusion groove (7) is provided at the axis of the bearing plate (6). The drip condensation unit (4) includes a dripping cylinder (416) mounted on a U-shaped frame and closed at both ends. The dripping cylinder (416) is made of heat-insulating material. The bottom of the dripping cylinder (416) is densely covered with needle tubes (44) communicating with the inner cavity of the dripping cylinder (416). The outer wall of the dripping cylinder (416) is provided with an inlet pipe (414) with a liquid inlet check valve. The inlet pipe (414) is connected to a water storage tank through a connecting pipe. The inner cavity of the dripping cylinder (416) is fixed with a lower heat-conducting plate (426), and the lower heat-conducting plate (426) is provided with an outlet pipe (43) with an outlet check valve. An upper heat-insulating plate (425) is slidably and sealed above the lower heat-conducting plate (426). An electric heater (42) is provided between the upper heat insulation plate (425) and the lower heat-conducting plate (426). A heat insulation column (427) is fixed to the upper end of the upper heat insulation plate (425), and the upper end of the heat insulation column (427) is slidably and sealed in the inner cavity of the heat insulation cylinder (428). The upper end of the heat insulation cylinder (428) is sealed by the first heat-conducting plate (415). A heat insulation shield (418) is rotatably provided at the upper end of the heat insulation cylinder (428) through a pin shaft, and a first gear (420) is fixed to the upper end of the pin shaft. A heat insulation cover (423) is fixed to the upper end of the upper heat insulation plate (425), and the bottom of the inner cavity of the heat insulation cover (423) is sealed by the second heat-conducting plate (429). The inner cavity of the heat insulation cover (423) is provided with a low-temperature duct. For a boiling point liquid, a heat insulation tube (430) is movably and sealed at the upper end of the heat insulation cover (423), and the upper end of the heat insulation tube (430) communicates with the inner cavity of the heat insulation cylinder (428). A groove is provided at the upper end of the upper heat insulation plate (425), and a heat insulation turntable (424) is rotatably provided in the groove. A third heat-conducting plate (41) adapted to the second heat-conducting plate (429) is provided in the through hole of the heat insulation turntable (424). A fourth heat-conducting plate (431) is provided in the through hole at the bottom of the groove, and the fourth heat-conducting plate (431) is located directly below the second heat-conducting plate (429) and is the same size. A telescopic rod (421) is fixed at the upper axis of the heat insulation turntable (424), and the telescopic rod... The upper end of (421) is rotatably connected to the dripping cylinder (416). The upper end of the telescopic rod (421) is fixed with a second gear (422). It also includes a drive unit installed on the U-shaped frame. The drive unit includes an upper cylinder (47) and a lower cylinder (46) arranged vertically on the U-shaped frame. The inner cavities of the upper cylinder (47) and the lower cylinder (46) are connected by a connecting pipe. The inner cavity of the lower cylinder (46) is sealed and movably installed with a first movable rod (48). The first movable rod (48) passes through the outer end of the U-shaped frame and is fixed with an isosceles triangular extrusion block (49). The side end of the mounting plate (5) is fixed with an isosceles trapezoidal contact block (45) that is adapted to the isosceles triangular extrusion block (49).The inner cavity of the upper cylinder (47) is movably and sealed with a second movable rod (411), and the second movable rod (411) passes through the outer end of the U-shaped frame and is fixed with a spiral frame (417). The spiral frame (417) has driving teeth on both inner walls, and the driving teeth on both sides respectively mesh with the first gear (420) and the second gear (422). The side end of the spiral frame (417) is provided with a limiting rod (419), and the limiting rod (419) is connected to the... The U-shaped frame is slidably connected, and a mounting ring (413) is fixed on the second movable rod (411). A return spring (412) is fixed between the mounting ring (413) and the U-shaped frame, and the return spring (412) is located on the periphery of the second movable rod (411). In the initial state, the heat insulation shield (418) does not form a sealing shield on the upper end of the first heat-conducting plate (415), and the third heat-conducting plate (41) is not directly below the second heat-conducting plate (429).

3. The liquid dosing device for fly ash detection according to claim 2, characterized in that: A gap is provided between the lower end of the syringe (44) and the fly ash, and the gap is no higher than the length of a droplet that is just about to leave the syringe (44).

4. The liquid dosing device for fly ash detection according to claim 2, characterized in that: Both ends of the slide rail (2) are fixed with baffles (9).

5. The liquid dosing device for fly ash detection according to claim 2, characterized in that: The bottom of the bearing plate (6) is fixed with a support column (8), and the upper end of the mounting plate (5) is provided with an insertion hole that is compatible with the support column (8).

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