A kind of reagent dosing equipment for fly ash stabilization treatment

Abstract

The present invention discloses a reagent dosing device for fly ash stabilization treatment, which relates to the field of environmental engineering technology, and includes a weighing mechanism for weighing the weight of the reagent and a hopper located above the weighing mechanism, wherein the hopper is provided with a feeding pipe and a driving mechanism, and the feeding pipe is slidably connected to the bottom of the hopper; the driving mechanism is used to drive the feeding pipe to slide along the hopper, and when weighing, the driving mechanism drives the feeding pipe to be gradually retracted into the hopper. The reagent dosing device for fly ash stabilization treatment provided by the present invention, when weighing, drives the feeding pipe to move into the weighing container of the weighing mechanism through the driving mechanism, at this time, the distance between the outlet of the feeding pipe and the weighing container is small, the impact force generated when conveying the reagent is small, and the amount of dust dispersed when conveying the reagent is small, and during the process of conveying the reagent, the feeding pipe is driven by the driving mechanism to be gradually retracted into the hopper, so as to adapt to the height of the reagent in the weighing container.

Description

Technical Field

[0001] The invention relates to the technical field of environmental engineering, and in particular to a drug dosing device for fly ash stabilization treatment. Background Art

[0002] Fly ash from the flue gas purification system of domestic waste incineration plants (hereinafter referred to as fly ash) is a hazardous waste, which contains a large amount of heavy metals, such as Pb, Cr, Zn, Cu, As, Cd, Hg, etc. It must be stabilized and each batch of fly ash must be inspected and qualified before it can be landfilled. One of the fly ash stabilization treatment technologies is a combination of pH value adjustment and chemical agent chelation, that is, after adjusting the pH value of the fly ash, the chelating agent is stirred with the fly ash, and the heavy metal ions react with the chelating agent to be fixed, reducing the concentration of heavy metal leaching.

[0003] For example, the patent document with the authorization announcement number CN108246770B, the authorization announcement date September 11, 2020, and the name "A method for fine-tuning the dosage of reagents for fly ash stabilization treatment based on XRF detection" can perform real-time detection of the total amount of heavy metals in each batch of fly ash during the fly ash stabilization process. It can not only effectively avoid the stabilization of fly ash failing to meet the standards due to insufficient dosage, but also avoid the waste of reagents due to excessive dosage.

[0004] In the prior art, when adding medicines, the medicines are generally transported to a weighing mechanism for weighing to determine the amount of medicine added. However, when powdered medicines fall into the weighing mechanism, a certain impact force will be generated, which will cause part of the powder to escape into the air. Both the impact force of the powder on the weighing mechanism and the escape of the powder will affect the weighing result. Summary of the invention

[0005] The purpose of the present invention is to provide a fly ash stabilization treatment agent dosing device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A reagent dosing device for fly ash stabilization treatment comprises a weighing mechanism for weighing the reagent and a hopper located above the weighing mechanism, wherein the hopper is provided with:

[0008] A material delivery pipe, which is slidably connected to the bottom of the hopper;

[0009] The driving mechanism is used to drive the feeding pipe to slide along the hopper. When weighing, the driving mechanism drives the feeding pipe to be gradually retracted into the hopper.

[0010] The above-mentioned fly ash stabilization treatment agent dosing equipment has a slide plate on the outer wall of the hopper and a slide groove matched with the slide plate on the bottom end of the hopper.

[0011] The above-mentioned fly ash stabilization treatment agent dosing equipment, the driving mechanism includes a first connecting plate arranged at the bottom end of the conveying pipe, the first connecting plate is rotatably connected to a screw rod, the hopper is fixed with a sleeve rod threadedly connected to the screw rod, and also includes a power component for driving the screw rod to rotate.

[0012] The above-mentioned fly ash stabilization treatment agent dosing equipment, the power component includes a power motor fixed on the first connecting plate, a driving wheel is fixed on the output end of the power motor, and a connecting wheel connected to the driving wheel is fixed on the screw rod.

[0013] In the above-mentioned fly ash stabilization treatment agent dosing equipment, a flexible tube is fixed to the bottom end of the feed pipe, a second connecting plate is fixed to the bottom end of the flexible tube, a connecting frame is fixed to the outer wall of the feed pipe, and the second connecting plate is slidably connected to the connecting frame.

[0014] In the above-mentioned fly ash stabilization treatment agent dosing equipment, the first connecting plate is rotatably connected to the feed pipe.

[0015] In the above-mentioned fly ash stabilization treatment agent dosing equipment, the connecting frame is configured with a connecting groove, and the second connecting plate is slidably connected in the connecting groove.

[0016] In the above-mentioned fly ash stabilization treatment agent dosing equipment, a first transmission wheel is fixed on the screw rod, and a second transmission wheel connected to the first transmission wheel is fixed on the outer wall of the feed pipe.

[0017] In the above-mentioned fly ash stabilization treatment agent dosing equipment, a disc is rotatably connected to the connecting frame, a transmission rod is hinged on the disc, and one end of the transmission rod is hinged to the second connecting plate.

[0018] In the above-mentioned fly ash stabilization treatment agent dosing equipment, a third transmission wheel is fixed on the first connecting plate, and a fourth transmission wheel connected to the third transmission wheel is fixed on the disc.

[0019] In the above technical scheme, the present invention provides a kind of reagent dosing equipment for fly ash stabilization treatment. When weighing, the driving mechanism drives the feed pipe to move to the weighing container of the weighing mechanism. At this time, the distance between the outlet of the feed pipe and the weighing container is small, the impact force generated when conveying the reagent is small, and the amount of dust released during the reagent conveying is small. In the process of reagent conveying, the driving mechanism drives the feed pipe to be gradually retracted into the hopper to adapt to the height of the reagent in the weighing container; when the feed pipe is retracted into the hopper, the reagent in the hopper moves relatively toward the feed pipe, so that sufficient reagent can be maintained in the feed pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0022] Figure 2 A schematic cross-sectional view of a hopper and a first connecting plate provided in yet another embodiment of the present invention;

[0023] Figure 3 A schematic diagram of a connecting frame structure provided in yet another embodiment of the present invention;

[0024] Figure 4 A schematic cross-sectional structural diagram of a connecting frame provided in yet another embodiment of the present invention;

[0025] Figure 5 A schematic structural diagram of a first transmission wheel provided in yet another embodiment of the present invention;

[0026] Figure 6 A schematic cross-sectional structural diagram of a first connecting plate provided in yet another embodiment of the present invention;

[0027] Figure 7 A schematic diagram of a blade structure provided in another embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1. Hopper; 2. Feed pipe; 3. Weighing container; 4. Slide plate; 5. First connecting plate; 6. Screw rod; 7. Sleeve rod; 8. Power motor; 9. Driving wheel; 10. Connecting wheel; 11. Flexible tube; 12. Second connecting plate; 13. Connecting frame; 131. Bracket; 132. Connecting part; 14. Through hole; 15. First transmission wheel; 16. Second transmission wheel; 17. Disc; 18. Transmission rod; 19. Third transmission wheel; 20. Fourth transmission wheel; 21. Blade. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Reference Figure 1-7 An embodiment of the present invention provides a device for adding reagents for fly ash stabilization treatment, including a weighing mechanism for weighing the weight of the reagent and a hopper 1 located above the weighing mechanism, wherein the hopper 1 is provided with a feed pipe 2 and a driving mechanism, and the feed pipe 2 is slidably connected to the bottom of the hopper 1; the driving mechanism is used to drive the feed pipe 2 to slide along the hopper 1, and when weighing, the driving mechanism drives the feed pipe 2 to be gradually retracted into the hopper 1.

[0032] Specifically, the fluctuation range of the total amount of heavy metals in fly ash is large, so the reagent needs to be weighed according to the situation when adding. If the amount of reagent added is insufficient, the risk of fly ash leaching toxicity not meeting the standard will increase. If the amount of reagent added is too much, it will cause waste of reagent. The reagent added to fly ash is generally silicate, lime or various chelating agents and other materials to achieve the effect of adjusting the HP value of fly ash and chemical agent chelation; the reagent added to fly ash is liquid and powder. For powder reagents, the weighing accuracy is affected by various factors; the weighing mechanism can use the weighing structure such as the electronic scale in the prior art. The weighing mechanism is generally provided with a weighing container 3 to accommodate the reagent to be weighed. The weighed reagent can be mixed with fly ash or mixed. The above are all prior art and will not be repeated. The innovation of the embodiment of the present invention is that a hopper 1, a delivery pipe 2 and a driving mechanism are provided. The hopper 1 is used to store medicines and is arranged in an inverted cone shape. A feed port and a discharge port are respectively constructed at the upper and lower ends thereof. The delivery pipe 2 is slidably connected in the discharge port of the hopper 1. The top end of the delivery pipe 2 is communicated with the space in the material port, and the bottom end extends into the weighing container 3 and an electric valve structure is arranged at the bottom end (the electric valve structure is a prior art, not shown in the figure). When it is necessary to transport the medicine in the hopper 1 to the weighing container 3 for weighing through the delivery pipe 2, the electric valve structure is opened to discharge the medicine in the hopper 1 and the medicine in the delivery pipe 2 into the weighing container 3 under the action of gravity. The driving mechanism can select a linear driving structure such as an electric push rod in the prior art to drive the delivery pipe 2 to move. The feed pipe 2 slides along the hopper 1; before weighing, the feed pipe 2 is first driven down by the driving mechanism to move the bottom end of the feed pipe 2 to a position where it is about to fit the inner wall of the weighing container 3. At this time, the height difference between the bottom end of the feed pipe 2 and the weighing container 3 is small, and the impact force generated when the medicine is input into the weighing container 3 through the feed pipe 2 is small, and the amount of dust emitted during the medicine transportation is also small. In the process of transporting the medicine and weighing it, the driving mechanism drives the feed pipe 2 to be gradually retracted into the hopper 1, so that the bottom end of the feed pipe 2 is gradually raised, which can adapt to the gradually increasing amount of medicine accumulation in the weighing container 3, so that the top end of the medicine in the weighing container 3 and the bottom end of the feed pipe 2 maintain a suitable distance, try to avoid affecting the weighing accuracy of the weighing mechanism, and reduce the amount of dust emitted into the air.

[0033] An embodiment of the present invention provides a reagent dosing equipment for fly ash stabilization treatment. When weighing, the feed pipe 2 is driven by a driving mechanism to move to the weighing container 3 of the weighing mechanism. At this time, the distance between the outlet of the feed pipe 2 and the weighing container 3 is small, the impact force generated when conveying the reagent is small, and the amount of dust emitted when conveying the reagent is small. During the process of conveying the reagent, the feed pipe 2 is driven by the driving mechanism to be gradually retracted into the hopper 1 to adapt to the height of the reagent in the weighing container 3; when the feed pipe 2 is retracted into the hopper 1, the reagent in the hopper 1 moves relatively toward the feed pipe 2, so that sufficient reagent can be maintained in the feed pipe 2.

[0034] The feed pipe 2 can be directly sleeved in the discharge port of the hopper 1, so that the feed pipe 2 can be slidably connected to the hopper 1; in another embodiment provided by the present invention, preferably, the outer wall of the hopper 1 is configured with a slide plate 4, and the bottom end of the hopper 1 is configured with a slide groove adapted to the slide plate 4. Specifically, the slide groove is configured at the discharge port of the hopper 1, and a dynamic sealing structure is provided between the slide plate 4 and the slide groove to minimize leakage of the medicine from the discharge port of the hopper 1. The feed pipe 2, the slide plate 4 and the slide groove structure are all vertically configured, so that the feed pipe 2 can slide vertically along the hopper 1 through the slide plate 4 and the slide groove structure.

[0035] As an alternative solution for the above-mentioned electric push rod to drive the feed pipe 2 to slide along the hopper 1, preferably, the driving mechanism includes a first connecting plate 5 arranged at the bottom end of the feed pipe 2, and a screw rod 6 is rotatably connected to the first connecting plate 5. A sleeve rod 7 threadedly connected to the screw rod 6 is fixed on the hopper 1, and also includes a power component for driving the screw rod 6 to rotate. Specifically, the connection between the first connecting plate 5 and the conveying pipe 2 can be a fixed connection or a movable connection. The sleeve rod 7 and the screw rod 6 are both vertically arranged. The screw rod 6 and the sleeve rod 7 are threadedly connected by a ball screw 6. The power component can be a motor structure fixed on the first connecting plate 5 and the output end is fixed to the screw rod 6. When the power component is running, it can drive the screw rod 6 to rotate on the first connecting plate 5, so that the screw rod 6, the first connecting plate 5 and the conveying pipe 2 move axially along the sleeve rod 7; the screw rod 6, the sleeve rod 7 and the power component and other structures are arranged in two groups, and the two groups of structures are respectively located on the opposite sides of the first connecting plate 5, so as to improve the stability of the vertical movement of the first connecting plate 5 and the conveying pipe 2, and at the same time avoid the first connecting plate 5 from rotating during the lifting process.

[0036] Preferably, the power assembly includes a power motor 8 fixed on the first connecting plate 5, a driving wheel 9 is fixed to the output end of the power motor 8, and a connecting wheel 10 connected to the driving wheel 9 is fixed to the screw rod 6. Specifically, the transmission connection between the driving wheel 9 and the connecting wheel 10 can be selected from meshing transmission or friction transmission; when the power motor 8 is running, the driving wheel 9 and the connecting wheel 10 can drive the screw rod 6 to rotate, thereby driving the first connecting plate 5 and the conveying pipe 2 structure to move vertically; the diameters of the driving wheel 9 and the connecting wheel 10 can be adjusted according to the situation to determine the transmission ratio between the driving wheel 9 and the connecting wheel 10, such as Figure 2 As shown, the diameter of the driving wheel 9 is smaller than the diameter of the connecting wheel 10. At this time, the torque of the device is larger and the rotation speed of the conveying pipe is slower, thereby improving the stability of the device.

[0037] In each embodiment of the present invention, the weighing container 3 can be a container with a circular cross-section, and the feeding pipe 2 is located at the center of the weighing container 3 and has an outer diameter smaller than the inner diameter of the weighing container 3, so that when the feeding pipe 2 transports the medicine, the medicine can only fall into the weighing container 3 from a single position (the bottom end of the feeding pipe 2 is always relatively located at the center of the weighing container 3, so that the position for adding the medicine is relatively single). Obviously, this will cause the medicine at the center of the weighing container 3 to accumulate to a certain height and slide to the surroundings, which will aggravate the dispersion of the powder medicine. In another embodiment provided by the present invention, a flexible tube 11 is fixed to the bottom end of the feeding pipe 2, a second connecting plate 12 is fixed to the bottom end of the flexible tube 11, a connecting frame 13 is fixed to the outer wall of the feeding pipe 2, and the second connecting plate 12 is slidably connected to the connecting frame 13. The first connecting plate 5 is rotatably connected to the feeding pipe 2.Specifically, the first connecting plate 5 and the feed pipe 2 can rotate relative to each other but cannot move axially relative to each other, that is, when the first connecting plate 5 is lifted or lowered, the feed pipe 2 can be driven to rise or fall synchronously, and the feed pipe 2 can rotate on the first connecting plate 5; the bottom end of the feed pipe 2 protrudes from the bottom end of the first connecting plate 5, that is, the flexible tube 11 is entirely located at the bottom end of the first connecting plate 5; a connecting groove is configured on the connecting frame 13, and the second connecting plate 12 is slidably connected in the connecting groove; the connecting frame 13 includes a bracket 131 and a connecting portion 132 fixed to each other, the bracket 131 is located at the bottom of the first connecting plate 5 and fixed on the outer wall of the feed pipe 2, the connecting portion 132 is horizontally arranged, and the connecting groove is configured at the connecting portion 132 close to the flexible tube 11 On one side, a through hole 14 is configured on the second connecting plate 12. In this embodiment, an electric valve structure is arranged in the through hole 14 to control the opening or closing of the through hole 14 through the electric valve; a groove is configured at the bottom of the connecting groove. When the second connecting plate 12 is received in the connecting groove, the through hole 14 corresponds to the groove. At this time, the feeding pipe 2, the flexible tube 11 and the through hole 14 are on the same axis, so that the medicine in the feeding pipe 2 can be discharged into the weighing container 3 through the flexible tube 11, the through hole 14 and the groove, and the second connecting plate 12 and the connecting frame 13 are avoided as much as possible to affect the transportation of the medicine; the flexible tube 11 can use the corrugated tube structure in the prior art, and its two ends can be relatively deviated from the axis to achieve the bending effect; in this embodiment, the first The connecting plate 5 is connected to the hopper 1 through the structure of the screw rod 6 and the sleeve rod 7. The feed pipe 2, the connecting frame 13, and the second connecting plate 12 are relatively fixed together. The flexible tube 11 is between the feed pipe 2 and the second connecting plate 12. When the feed pipe 2 rotates, the flexible tube 11 will rotate synchronously with the feed pipe 2 and the second connecting plate 12. In this embodiment, the medicine is added to the weighing container 3 through the flexible tube 11 and the second connecting plate 12. For this purpose, the second connecting plate 12 needs to be lowered to a position where it is about to fit the inner wall of the weighing container 3. With the operation of the driving mechanism, the position of the second connecting plate 12 can be gradually raised, so that the top end of the medicine in the weighing container 3 and the bottom end of the second connecting plate 12 maintain a suitable distance to reduce the distance the medicine falls. , thereby reducing the impact force on the weighing mechanism and reducing the amount of dust released; in this embodiment, two additional power sources can be provided, one for driving the feeding pipe 2 to rotate on the first connecting plate 5, such as a motor structure, and the other for driving the second connecting plate 12 to slide back and forth along the connecting groove, such as an electric push rod structure; with such a configuration, when the powdered medicine is added to the weighing container 3, the first connecting plate 5 and the feeding pipe 2 are driven to rise by the driving mechanism. During this process, the feeding pipe 2 is driven to rotate on the first connecting plate 5 by the motor structure, and the second connecting plate 12 is driven to slide back and forth along the connecting groove by the electric push rod, so that the second connecting plate 12 rotates and approaches (or moves away from) the central axis of the feeding pipe 2 during the rising process.

[0038] The advantages are that, firstly, during the process of adding the medicine, the second connecting plate 12 gradually rises to adapt to the gradually increasing height of the medicine in the weighing container 3, so as to minimize the distance the medicine falls, thereby reducing the impact force of the medicine on the inner wall of the weighing container 3 and improving the weighing accuracy as much as possible; secondly, the second connecting plate 12 will rotate and approach (or move away from) the central axis of the feeding pipe 2 during the rising process, which will make the path of the second connecting plate 12 (through hole 14) in the weighing container 3 present a three-dimensional spiral shape, so that the medicine is discharged into various positions of the weighing container 3 through the through hole 14, thereby improving the dispersion degree of the medicine when it is added and avoiding the accumulation of the medicine at a single position in the weighing container 3 as much as possible; thirdly, the second connecting plate 12 The reciprocating movement of the connecting plate 12 along the connecting groove can make the through hole 14 reciprocate close to or away from the central axis of the feeding pipe 2, which can improve the dispersion effect of the medicine in the weighing container 3; fourthly, in the above embodiment, the medicine is directly discharged into the weighing container 3 through the vertical feeding pipe 2, so that the medicine accumulates a certain gravitational potential energy in the feeding pipe 2, which will increase the impact force of the medicine on the weighing container 3. In this embodiment, the flexible tube 11 bends with the movement of the second connecting plate 12, so that the medicine will hit the inner wall of the flexible tube 11 when it is discharged from the feeding pipe 2, which will consume the gravitational potential energy accumulated by the medicine in the feeding pipe 2, and minimize the impact force of the medicine on the weighing container 3 (while reducing the escape of dust).

[0039] It should be noted that, in this embodiment, the feed pipe 2 needs to rotate relative to the first connecting plate 5 during the lifting process, that is, the feed pipe 2 will rotate relative to the hopper 1 when it is retracted into or extended from the hopper 1. For this reason, the feed pipe 2 and the discharge port of the hopper 1 need to be smoothly connected (that is, the slide plate 4 and the chute structure cannot be used in this embodiment). Figure 3 As shown, the outer wall above the feed pipe 2 needs to be constructed as a smooth outer wall (that is, there is no slide plate 4 structure), so that the feed pipe 2 is directly sleeved on the discharge port of the hopper 1, so that the feed pipe 2 can slide and rotate in the discharge port of the hopper 1 (similar to the telescopic rod structure), thereby adapting to the operation of the device; accordingly, a dynamic sealing structure is also required between the feed pipe 2 and the discharge port of the hopper 1 to minimize leakage of the agent.

[0040] As an alternative to the above-mentioned motor structure driving the feed pipe 2 to rotate, preferably, a first transmission wheel 15 is fixed on the screw rod 6, and a second transmission wheel 16 is fixed on the outer wall of the feed pipe 2 to be transmission-connected with the first transmission wheel 15. Specifically, the transmission connection between the first transmission wheel 15 and the second transmission wheel 16 can be selected from meshing transmission or friction transmission; in this embodiment, the above-mentioned motor structure driving the feed pipe 2 to rotate is omitted, and when the power assembly drives the screw rod 6 to rotate, the first transmission wheel 15 rotates synchronously with the screw rod 6, so that the first transmission wheel 15 drives the second transmission wheel 16 and the feed pipe 2 to rotate relative to the first connecting plate 5, thereby eliminating the power source that should be additionally provided.

[0041] As an alternative solution for the above-mentioned electric push rod structure to drive the second connecting plate 12 to reciprocate along the connecting groove, preferably, a disc 17 is rotatably connected to the connecting frame 13, a transmission rod 18 is hinged on the disc 17, and one end of the transmission rod 18 is hinged to the second connecting plate 12. A third transmission wheel 19 is fixed to the first connecting plate 5, and a fourth transmission wheel 20 that is transmission-connected to the third transmission wheel 19 is fixed on the disc 17. Specifically, the disc 17 is rotatably connected to the connecting portion 132 of the connecting frame 13, the fourth transmission wheel 20 is fixed to a side of the disc 17 close to the feed pipe 2, and the third transmission wheel 19 is fixed to the bottom end of the first connecting plate 5. The transmission connection between the third transmission wheel 19 and the fourth transmission wheel 20 can be a meshing transmission (such as a bevel gear) or a friction transmission (such as a conical friction wheel); in the process of the feed pipe 2 rotating relative to the first connecting plate 5, the connecting frame 13 also rotates relative to the third transmission wheel 19. When the connecting frame 13 and the third transmission wheel 19 rotate relative to each other, the third transmission wheel 19 rotates relative to the third transmission wheel 19. The third transmission wheel 19 and the fourth transmission wheel 20 are relatively transmitted, that is, the fourth transmission wheel 20 and the disc 17 can roll relatively on the third transmission wheel 19; the hinge point of the transmission rod 18 and the disc 17 deviates from the center of the disc 17, and a through groove is constructed on the connecting portion 132. The hinge point of the connecting rod and the second connecting plate 12 is located in the through groove, so that the second connecting plate 12 can be driven to slide back and forth along the connecting groove by the transmission rod 18 during the rotation of the disc 17 (it should be noted that during the rotation of the disc 17, the angle of the transmission rod 18 always remains inclined (such as Figure 5 As shown, the through hole 14, the flexible tube 11 and the feed pipe 2 are on the same axis. At this time, the disc 17 rotates clockwise relative to the third transmission wheel 19 to drive the second connecting plate 12 to extend out of the connecting groove through the transmission rod 18, that is, away from the axis of the feed pipe 2, and try to avoid the transmission rod 18 and the second connecting plate 12 from getting stuck after being perpendicular). The advantage of such a setting is that by setting the third transmission wheel 19 and the disc 17 and other structures, the feed pipe 2 can drive the disc 17 to rotate passively during the self-rotation process, and the rotation of the disc 17 can drive the second connecting plate 12 to move back and forth in the connecting groove, so that the second connecting plate 12 is driven to move in a three-dimensional spiral shape during the lifting and lowering process of the feed pipe 2, thereby changing the discharge position of the medicine, and making the medicine dispersed and fall into the weighing container 3 as much as possible.

[0042] In another embodiment provided by the present invention, further, a blade 21 is fixed to the top of the feed pipe 2. Specifically, the blade 21 is provided in plurality and the plurality of blades 21 form a certain angle with the feed pipe 2 (such as Figure 7As shown); in the process of receiving and extending the feeding pipe 2 into the hopper 1, the feeding pipe 2 will rotate, and the multiple blades 21 at the top of the feeding pipe 2 will rotate synchronously with the feeding pipe 2, so as to stir the medicine in the hopper 1, and try to avoid the medicine in the hopper 1 from agglomerating or hardening. If the power component drives the feeding pipe 2 to be received into the hopper 1, the medicine in the feeding pipe 2 will continue to be transported to the weighing container 3. At this time, the medicine in the hopper 1 is stirred by the blades 21 and falls relatively into the feeding pipe 2, so as to ensure that there is sufficient medicine in the feeding pipe 2 as much as possible; if the power component drives the feeding pipe 2 to extend the material, the space in the hopper 1 will increase (because the feeding pipe 2 is moved out of the hopper 1). At this time, the medicine can continue to be stirred by the reverse rotation of the blades 21, and the medicine is prevented from being hardened and not settled as much as possible, and the agglomeration or hardening of the medicine above the feeding pipe 2 due to the hardening of the medicine is avoided as much as possible, which will affect the subsequent transportation and addition of the medicine.

[0043] It should be noted that the conveying pipe 2 rotates during the lifting process and drives the blades 21 to rotate, which can stir the medicine in the hopper 1. During this process, the blades 21 do not interfere with the sleeve rods 7, that is, the rotation range of the blades 21 is between the two sleeve rods 7. The lifting and lowering, self-rotation of the conveying pipe 2 and the stirring of the blades 21 can effectively prevent the powder medicine in the hopper 1 from agglomerating or compacting.

[0044] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A reagent dosing device for fly ash stabilization treatment, comprising a weighing mechanism for weighing the reagent and a hopper located above the weighing mechanism, characterized in that: The hopper is provided with: A material delivery pipe, which is slidably connected to the bottom of the hopper; A driving mechanism, which is used to drive the conveying pipe to slide along the hopper. When weighing, the driving mechanism drives the conveying pipe to be gradually retracted into the hopper; The driving mechanism comprises a first connecting plate arranged at the bottom end of the material conveying pipe, a screw rod is rotatably connected to the first connecting plate, a sleeve rod threadably connected to the screw rod is fixed on the hopper, and also comprises a power assembly for driving the screw rod to rotate; The power assembly comprises a power motor fixed on the first connecting plate, a driving wheel is fixed on the output end of the power motor, and a connecting wheel drivingly connected to the driving wheel is fixed on the screw rod; A flexible tube is fixed at the bottom end of the feed pipe, a second connecting plate is fixed at the bottom end of the flexible tube, a connecting frame is fixed on the outer wall of the feed pipe, and the second connecting plate is slidably connected to the connecting frame; The first connecting plate is rotatably connected to the material conveying pipe; The connecting frame is provided with a connecting groove, and the second connecting plate is slidably connected in the connecting groove; A first transmission wheel is fixed on the screw rod, and a second transmission wheel connected to the first transmission wheel is fixed on the outer wall of the conveying pipe; A disc is rotatably connected to the connecting frame, a transmission rod is hinged to the disc, and one end of the transmission rod is hinged to the second connecting plate; A third transmission wheel is fixed on the first connecting plate, and a fourth transmission wheel drivingly connected to the third transmission wheel is fixed on the disc; The conveying pipe can drive the disc to rotate passively during its rotation, and the rotation of the disc can drive the second connecting plate to move back and forth in the connecting groove, thereby driving the second connecting plate to move in a three-dimensional spiral shape during the lifting and lowering of the conveying pipe; Blades are fixed on the top of the feed conveying pipe.

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