Chemical dosing device for drilling waste flushing fluid

Abstract

This utility model discloses a chemical dosing device for drilling waste flushing fluid, including a support frame, a premixing component, a dispensing valve, a secondary mixing component, and a water supply component. The premixing component consists of a storage tank, a dispensing cylinder, and a rotating drum. A spiral drive plate on the outer wall of the rotating drum forms a spiral flow channel with the inner wall of the dispensing cylinder, and a stirring rod is installed on the inner wall of the rotating drum. The dispensing valve has three output ends, connecting the bottom port of the dispensing cylinder to three dispensing tanks. The secondary mixing component includes three independent dispensing tanks, each equipped with a stirring mechanism. The water supply component supplies water to the spiral flow channel through an inlet, driving the rotating drum to rotate. This utility model achieves premixing of the chemical powder by driving the rotating drum to rotate using water flow dynamics. Combined with the dispensing valve, the chemical solution is selectively distributed to multiple tanks, and then deeply mixed by the secondary stirring mechanism. This solves the problems of powder agglomeration, uneven mixing, high energy consumption, and inability to adapt to multiple working conditions in existing devices. Ultimately, it achieves efficient homogenization of the chemical solution, reduces energy consumption, and improves the flexibility of waste flushing fluid treatment.

Description

Technical Field

[0001] This utility model relates to the field of drilling waste flushing fluid treatment technology, and more specifically to a chemical dosing device for drilling waste flushing fluid. Background Technology

[0002] In engineering fields such as geological drilling and mineral exploration, drilling waste flushing fluid contains pollutants such as clay particles, chemical additives, and heavy metals. Direct discharge would cause serious environmental hazards and requires treatment through chemical dosing. This involves adding specific agents (such as flocculants and oxidants) to the waste flushing fluid to achieve the precipitation, decomposition, or solidification of pollutants. In this process, the chemical dosing unit is the core equipment; its mixing effect, operational flexibility, and energy consumption control capabilities directly affect the treatment efficiency and compliance rate of the waste flushing fluid. Currently, various technical solutions for chemical dosing units have been developed in the industry, but many problems still need to be solved in practical applications.

[0003] Most existing chemical dosing devices employ a "single-stage mixing" mode, where the chemical powder and water are directly mixed in a single container, relying on a single stirring mechanism for dissolution and homogenization. This structure is prone to powder agglomeration due to insufficient mixing, resulting in waste of the chemical and the inability of undissolved powder to react effectively with pollutants in the waste flushing solution, thus affecting the treatment effect. Furthermore, single-stage mixing requires a high-power stirring motor to maintain the mixing effect, leading to high energy consumption over long-term operation. The presence of the motor and transmission components also increases the probability of equipment failure and raises maintenance costs.

[0004] In terms of operational flexibility, traditional equipment is mostly designed with a "single tank with fixed capacity," which can only adapt to single-volume processing needs. When the volume of waste flushing fluid to be processed is small, the equipment is prone to being idle or underloaded, resulting in wasted energy and space. When the processing volume increases sharply or the reagent concentration needs to be adjusted to accommodate fluctuations in pollutant concentration, the single-tank structure cannot simultaneously meet the needs of "preparation of multiple concentration reagents" or "large-scale rapid processing," requiring shutdown for adjustments and interrupting the processing flow. In addition, if a mixing tank of the equipment needs cleaning or maintenance, the entire unit often needs to be shut down, further reducing processing efficiency and making it difficult to adapt to the complex and ever-changing working conditions at drilling sites.

[0005] Therefore, how to provide a new chemical dosing device for drilling waste flushing fluid that can achieve efficient and uniform mixing of the chemical solution to ensure the treatment effect of waste flushing fluid, while also reducing equipment energy consumption and structural complexity, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the present invention provides a chemical dosing device for drilling waste flushing fluid, which aims to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A chemical dosing device for drilling waste flushing fluid, comprising:

[0009] Support frame;

[0010] The premixing component includes a medicine storage tank, a dispensing cylinder, and a rotating drum. The medicine storage tank is fixedly connected to the top of a support frame and contains medicine powder. The dispensing cylinder is arranged along the height direction of the support frame and is fixedly connected to the top of the support frame. The rotating drum is located inside the dispensing cylinder, is coaxially arranged with the dispensing cylinder, and is rotatably connected. The outlet end of the medicine storage tank is arranged corresponding to the top end of the rotating drum. A drive plate arranged spirally along the height direction of the support frame is fixedly connected to the outer cylinder surface of the rotating drum. The drive plate and the inner cylinder surface of the dispensing cylinder form a spiral flow channel. A stirring rod is fixedly connected to the inner cylinder surface of the rotating drum near its bottom end. The dispensing cylinder has an inlet above the spiral flow channel, and the outlet of the spiral flow channel is connected to the inner cavity of the rotating drum.

[0011] The liquid separator valve has three output ends. The bottom port of the dispensing cylinder is connected to the inlet port of the liquid separator valve, and the bottom port of the dispensing cylinder can be switched to connect to the three output ends of the liquid separator valve.

[0012] The secondary mixing assembly includes a dosing tank and a stirring mechanism. The three dosing tanks are fixedly connected to the support frame and are respectively connected to the three output ends of the dispensing valve through pipelines. The stirring end of the stirring mechanism is located inside the dosing tank.

[0013] The water supply component has its outlet and inlet connected by a pipeline. Water flows through the inlet and enters the mixing cylinder through a spiral channel, which drives the rotating cylinder to rotate and stir the liquid medicine inside.

[0014] Therefore, this utility model achieves preliminary and efficient mixing through a premixing component. The medicine storage tank supplies medicine powder, and the water supply component flows into the spiral flow channel of the rotating drum inside the mixing cylinder, driving the drum to rotate. The spiral drive plate on the outer cylinder surface facilitates the initial contact between the water flow and the medicine powder, while the stirring rod on the inner cylinder surface stirs to prevent clumping, and reduces energy consumption without the need for additional power. With the help of a liquid distribution valve with three output ends, the preliminary medicine solution can be selectively diverted to the corresponding mixing tank, realizing flexible operation of single tank small batch, multiple tanks in parallel, or without stopping the machine during maintenance. Then, the stirring mechanism in the mixing tank of the secondary mixing component performs deep homogenization, avoiding stirring dead zones. Finally, through the synergy of various structures, the technical effect of uniform medicine solution mixing, low energy consumption, flexible operation, adaptability to different drilling waste flushing fluid treatment needs, and stable operation is achieved.

[0015] Preferably, the premixing component further includes a sieve plate, which has sieve holes evenly distributed on it and is fixedly connected to the bottom end of the rotating drum.

[0016] Preferably, the premixing component further includes a positioning column, the bottom end of which is fixedly connected to the inner cylinder surface of the mixing cylinder via a connecting column, and the screen plate has a rotating hole that is arranged corresponding to and rotatably connected to the positioning column.

[0017] Preferably, there are multiple connecting columns, which are evenly arranged in an array along the circumference of the positioning columns.

[0018] Preferably, the premixing component further includes baffles, the surface of which is arranged perpendicularly to and fixedly connected to the surface of the drive plate, and there are multiple baffles that are evenly spaced along the spiral direction of the drive plate.

[0019] Preferably, the stirring mechanism includes a servo motor and stirring blades. The servo motor is fixedly connected to the top of the medicine tank, and the stirring blades are located inside the medicine tank and are connected to the power output end of the servo motor.

[0020] Preferably, there are three stirring mechanisms, which are arranged corresponding to three medicine dispensing tanks.

[0021] Preferably, it also includes a dosing pump, the inlet of which is connected to three dosing tanks via pipeline, and the outlet of which is connected to a container holding waste flushing fluid via pipeline.

[0022] Preferably, the water supply assembly includes a water supply pump and a water supply pipeline, wherein the inlet end of the water supply pump is connected to a water source, and the water supply pipeline is connected between the outlet end of the water supply pump and the inlet end. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 The attached figure is a schematic diagram of a chemical dosing device for drilling waste flushing fluid provided by this utility model;

[0025] Figure 2 The attached figure is a schematic diagram of the structure of a chemical dosing device for drilling waste flushing fluid provided by this utility model (from another perspective);

[0026] Figure 3 for Figure 1 A magnified view of a section at point A;

[0027] Figure 4 The attached figure is a partial cross-sectional view of a chemical dosing device for drilling waste flushing fluid provided by this utility model;

[0028] Figure 5 The attached figure is a half-sectional view of the premixing component and the dispensing valve provided by this utility model in the assembled state;

[0029] Figure 6 for Figure 5 A magnified view of section B;

[0030] Figure 7 The attached figure is a partial cross-sectional view of the premixing component and the dispensing valve provided by this utility model in the assembled state;

[0031] Figure 8 The attached figure is a partial cross-sectional view of the premixing component and dispensing valve provided by this utility model in assembly from another perspective.

[0032] Figure 9 The attached figure is a three-dimensional schematic diagram of the rotating drum provided by this utility model;

[0033] Figure 10 The attached figure is a partial cross-sectional view of the rotating drum provided by this utility model;

[0034] Figure 11 The attached figure is a half-sectional view of the valve core provided by this utility model.

[0035] in:

[0036] 1-Support frame; 2-Premixing component; 3-Dispensing valve; 4-Secondary mixing component; 5-Water supply component; 6-Dosing pump; 7-Overflow cleaning pipeline; 8-Drainage pipeline; 21-Storage tank; 22-Dispensing cylinder; 23-Rotating drum; 24-Sieve plate; 25-Positioning column; 26-Connecting column; 27-Baffle; 31-Valve body; 32-Valve core; 33-Servo motor three; 34-Pipeline one; 35-Pipeline two; 36-Pipeline three; 41-Dosing tank; 42-Stirring mechanism; 51-Water supply pipeline; 52-Filter Components: 53-Flow meter; 71-Main discharge pipe; 72-Cleaning discharge pipe; 73-Overflow pipe; 220-Inlet; 221-Rotating ring plate; 230-Spiral channel; 231-Drive plate; 232-Agitator; 233-Positioning ring; 241-Rotating hole; 281-Servo motor II; 282-Commutator; 283-Spiral conveyor rod; 321-Channel I; 322-Channel II; 323-Channel III; 324-Channel IV; 421-Servo motor I; 422-Agitator blade. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] See appendix Figure 1 To be continued Figure 8 This utility model discloses a chemical dosing device for drilling waste flushing fluid, including: a support frame 1, a premixing component 2, a liquid separator 3, a secondary mixing component 4, and a water supply component 5;

[0039] The premixing component 2 includes a medicine storage tank 21, a dispensing cylinder 22, and a rotating cylinder 23. The medicine storage tank 21 is fixedly connected to the top of the support frame 1 and contains medicine powder inside. The dispensing cylinder 22 is arranged along the height direction of the support frame 1 and is fixedly connected to the top of the support frame 1. The rotating cylinder 23 is located inside the dispensing cylinder 22, is coaxially arranged with the dispensing cylinder 22, and is rotatably connected. The outlet end of the medicine storage tank 21 is arranged corresponding to the top end of the rotating cylinder 23. A drive plate 231 is fixedly connected to the outer cylinder surface of the rotating cylinder 23 and is spirally arranged along the height direction of the support frame 1. The drive plate 231 and the inner cylinder surface of the dispensing cylinder 22 form a spiral flow channel 230. A stirring rod 232 is fixedly connected to the inner cylinder surface of the rotating cylinder 23 near its bottom end. The dispensing cylinder 22 is provided with an inlet 220 above the spiral flow channel 230. The outlet of the spiral flow channel 230 is connected to the inner cavity of the rotating cylinder 23.

[0040] The liquid separator 3 has three output ends. The bottom port of the dispensing cylinder 22 is connected to the inlet port of the liquid separator 3. The bottom port of the dispensing cylinder 22 can be switched to connect to the three output ends of the liquid separator 3.

[0041] The secondary mixing component 4 includes a drug preparation tank 41 and a stirring mechanism 42. The three drug preparation tanks 41 are all fixedly connected to the support frame 1 and are respectively connected to the three output ends of the liquid separator 3 through pipelines. The stirring end of the stirring mechanism 42 is located inside the drug preparation tank 41.

[0042] The outlet and inlet 220 of the water supply component 5 are connected by a pipeline. The water flows through the inlet 220 and enters the mixing cylinder 22 through the spiral flow channel 230, which drives the rotating cylinder 23 to rotate and stir the medicine liquid inside.

[0043] Specifically, a conveying pipe is fixedly connected to the side wall of the medicine storage tank 21 facing the premixing component 2, and communicates with the inside of the medicine storage tank 21. The port of the conveying pipe away from the medicine storage tank 21 passes through the wall of the mixing cylinder 22, is located inside the mixing cylinder 22, and is located above the top port of the rotating cylinder 23.

[0044] Specifically, it also includes a powder conveying assembly, which includes a servo motor 281, a commutator 282, and a screw conveyor 283. The fixed end of the servo motor 281 is fixedly connected to the outer wall of the medicine storage tank 21. The housing of the commutator 282 is fixedly connected to the outer wall of the medicine storage tank 21. The power input end of the commutator 282 is drivenly connected to the power output end of the servo motor 281. The screw conveyor 283 is located at a low position inside the medicine storage tank 21. One end of the screw conveyor 283 is drivenly connected to the power output end of the commutator 282. The other end of the screw conveyor 283 is located inside the conveying pipe. The rotation of the servo motor 281 drives the screw conveyor 283 to rotate, discharging the powder inside the medicine storage tank 21 from the conveying pipe.

[0045] Specifically, the liquid separator 3 includes a valve body 31 and a valve core 32. The valve body 31 has a rotating cavity inside, and the valve core 32 is rotatably connected to the rotating cavity. The top end of the valve body 31 is fixedly connected to the bottom end port of the dispensing cylinder 22, and a connecting hole is provided to connect the rotating cavity and the internal space of the dispensing cylinder 22.

[0046] Specifically, the valve body 31 has three liquid outlet holes on its two sides and bottom. The liquid outlet hole at the bottom of the valve body 31 is coaxial with and opposite to the connecting hole. The liquid outlet holes on both sides of the valve body 31 are coaxial and symmetrically arranged on both sides of the axis of the dispensing cylinder 22. The outer wall of the valve body 31 is fixedly connected to the three liquid outlet holes, and the pipes 34, 35 and 36 are respectively arranged corresponding to the three dispensing tanks 41. The valve core 32 has interconnected channels 321, 322, 323 and 324.

[0047] According to the appendix Figure 6 As shown in the orientation, the valve core 32 has four working positions: connection one, connection two, connection three, and valve closed. When the valve core 32 is in the connection one working position, the two channels 322 and the four channels 324 are connected to the connecting hole and the liquid outlet located on the left side of the valve body 31, respectively. The one channel 321 and the four channels 324 are closed by the inner wall of the rotating cavity.

[0048] When the valve core 32 is in the second working position, the third channel 323 and the first channel 321 are connected to the connecting hole and the liquid outlet hole located at the bottom of the valve body 31, respectively, while the second channel 322 and the fourth channel 324 are closed by the inner wall of the rotating cavity.

[0049] When the valve core 32 is in the three working positions, channel four 324 and channel two 322 are connected to the connecting hole and the liquid outlet hole located on the right side of the valve body 31, respectively, and channel one 321 and channel three 323 are closed by the inner wall of the rotating cavity.

[0050] When the valve core 32 is in the valve closed working position, channels 1 321, 2 322, 3 323 and 4 324 are all closed by the inner wall of the rotating cavity.

[0051] See appendix Figure 10 The premixing component 2 also includes a sieve plate 24, which has sieve holes evenly distributed on it and is fixedly connected to the bottom end of the rotating drum 23.

[0052] Specifically, the premixed component 2 also includes a positioning post 25. The bottom end of the positioning post 25 is fixedly connected to the inner cylinder surface of the mixing cylinder 22 through a connecting post 26. The sieve plate 24 has a rotating hole 241 that is arranged and rotatably connected to the positioning post 25.

[0053] Specifically, a rotating ring plate 221 is fixedly connected to the inner wall of the dispensing cylinder 22 below the conveying pipe. The rotating ring plate 221 is coaxially arranged with the dispensing cylinder 22. A positioning ring 233 is fixedly connected to the outer cylinder surface of the rotating cylinder 23 and is rotatably connected to the rotating ring plate 221.

[0054] More specifically, the outer ring surface of the positioning ring 233 is provided with an annular groove that is rotatably connected to the rotating ring plate 221.

[0055] More specifically, the positioning ring 233 and the rotating ring plate 221 seal the top opening of the spiral flow channel 230 located between the inner cylinder surface of the mixing cylinder 22 and the outer cylinder surface of the rotating cylinder 23. The water entering the spiral flow channel 230 through the water inlet 220 can only move downward in the spiral flow channel 230. It enters the mixing cylinder 22 from the lower gap between the inner cylinder surface of the mixing cylinder 22 and the outer cylinder surface of the rotating cylinder 23, and fills the rotating cylinder 23 from the bottom end upward. During the water flow, the rotating cylinder 23 is driven to rotate, and then the mixing rod 232 fixedly connected to the inner wall of the rotating cylinder 23 stirs the mixed solution of medicine powder and water in the rotating cylinder 23.

[0056] More specifically, since the bottom end of the rotating drum 23 is fixedly connected to the sieve plate 24, the powder entering the rotating drum 23 will accumulate on the upper surface of the sieve plate 24 and will not directly pass through the rotating drum 23 and fall into the bottom position of the inner cylinder surface of the positioning ring 233.

[0057] In this embodiment, there are multiple connecting posts 26, which are arranged in a uniform array around the circumference of the positioning posts 25.

[0058] See appendix Figure 9 The premixed component 2 also includes baffles 27, the surface of which is arranged perpendicularly to and fixedly connected to the surface of the drive plate 231. There are multiple baffles 27, which are evenly spaced along the spiral direction of the drive plate 231.

[0059] See appendix Figure 4 The stirring mechanism 42 includes a servo motor 421 and a stirring blade 422. The servo motor 421 is fixedly connected to the top of the medicine tank 41, and the stirring blade 422 is located inside the medicine tank 41 and is connected to the power output end of the servo motor 421.

[0060] In this embodiment, there are three stirring mechanisms 42, which are arranged corresponding to the three medicine dispensing tanks 41.

[0061] In some embodiments, a dosing pump 6 is also included. The inlet end of the dosing pump 6 is connected to three dosing tanks 41 via pipelines, and the outlet end of the dosing pump 6 is connected to a container containing waste flushing fluid via pipelines.

[0062] In some specific embodiments, the water supply component 5 includes a water supply pump and a water supply pipeline 51. The inlet end of the water supply pump is connected to a water source, and the water supply pipeline 51 is connected between the outlet end of the water supply pump and the inlet 220.

[0063] Specifically, the water supply assembly 5 also includes a filter 52 and a flow meter 53. Both the filter 52 and the flow meter 53 are installed on the water supply pipeline 51, with the filter 52 located behind the flow meter 53 along the water flow direction.

[0064] More specifically, it also includes a main discharge pipe 71, a cleaning discharge pipe 72, and an overflow pipe 73. Each medicine tank 41 has an overflow pipe 73 fixedly connected to its interior near its top side wall, and a cleaning discharge pipe 72 fixedly connected to its interior near its bottom side wall. Both the overflow pipe 73 and the cleaning discharge pipe 72 are connected to the main discharge pipe 71.

[0065] More specifically, both the cleaning discharge pipe 72 and the overflow pipe 73 are equipped with valves.

[0066] The specific principle and usage method of the chemical dosing device for drilling waste flushing fluid provided in this embodiment are as follows:

[0067] The medicine storage tank 21 stores the powder needed to treat waste flushing fluid, and the powder conveying assembly is responsible for accurately conveying the powder to the premixing area. When the servo motor 281 starts, power is transmitted to the screw conveyor 283 via the commutator 282. As the screw conveyor 283 rotates, it pushes the powder at a lower position in the medicine storage tank 21 to the conveying pipe. Finally, the powder falls from the port of the conveying pipe into the rotating drum 23, achieving quantitative and stable powder delivery and preventing powder accumulation or delivery interruption.

[0068] Water supply component 5 provides a stable water flow for premixing: The water supply pump starts, and water from the source is transported through water supply pipeline 51. It first passes through filter 52 to filter impurities, preventing blockage of the pipeline or affecting the purity of the solution. Then, flow meter 53 monitors the water flow rate in real time to ensure it meets the premixing requirements. The water finally enters the spiral flow channel 230 through the inlet 220 on the mixing cylinder 22.

[0069] After the water flows into the spiral channel 230, the driving plate 231 is arranged in a spiral shape. As the water flows downward along the spiral channel 230, it generates a driving force, causing the rotating drum 23 to rotate around its own axis. During the rotation of the rotating drum 23, the stirring rods 232 on its inner wall rotate synchronously, stirring the powder and water falling into the rotating drum 23 to achieve preliminary mixing. At the same time, the baffle 27 on the driving plate 231 can slow down the water flow speed, prolong the contact time between the powder and the water, improve the uniformity of the preliminary mixing, and reduce energy consumption by eliminating the need for additional power to drive the rotating drum 23.

[0070] After initial mixing, the liquid medicine flows into the valve body 31 of the dispensing valve 3 through the bottom port of the dispensing cylinder 22. The dispensing valve 3 switches between different outputs by rotating the valve core 32: the servo motor 33 drives the valve core 32 to rotate. When the valve core 32 is in the "connection one" working position, channel two 322 and channel four 324 are connected to the connecting hole and the left outlet hole of the valve body 31, respectively, and the liquid medicine flows into the corresponding dispensing tank 41 through pipeline one 34; when it is in the "connection two" working position, channel three 323 and channel one 321 are connected to the connecting hole and the bottom outlet hole, respectively, and the liquid medicine flows into the corresponding dispensing tank 41 through pipeline two 35; when it is in the "connection three" working position, channel four 324 and channel two 322 are connected to the connecting hole and the right outlet hole, respectively, and the liquid medicine flows into the corresponding dispensing tank 41 through pipeline three 36; when it is in the "valve closed" working position, all channels are closed by the inner wall of the valve body 31, and the liquid medicine is temporarily stored in the valve body 31. By adjusting the different working positions of the valve core 32, the liquid can be selectively diverted to one or more dispensing tanks 41 to meet different processing volume requirements.

[0071] The initial chemical solution entering the mixing tank 41 undergoes secondary deep mixing via the stirring mechanism 42: servo motor 421 starts, driving the stirring blades 422 inside the mixing tank 41 to rotate. The stirring blades 422 thoroughly stir the chemical solution, eliminating any uneven mixing that may occur during premixing, avoiding dead zones, and ensuring the chemical solution reaches a homogeneous state. This guarantees uniform chemical concentration and provides a high-quality solution for subsequent treatment of waste rinsing fluid. Three stirring mechanisms 42 correspond to three mixing tanks 41, and their stirring parameters can be independently controlled.

[0072] The finished drug solution is delivered to the waste flushing solution container via the dosing pump 6.

[0073] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A chemical dosing device for drilling waste fluid, characterized in that, include: Support frame (1); A premixing component (2) includes a medicine storage tank (21), a dispensing cylinder (22), and a rotating drum (23). The medicine storage tank (21) is fixedly connected to the top of the support frame (1) and contains medicine powder. The dispensing cylinder (22) is arranged along the height direction of the support frame (1) and is fixedly connected to the top of the support frame (1). The rotating drum (23) is located inside the dispensing cylinder (22), coaxially arranged with the dispensing cylinder (22), and rotatably connected. The outlet end of the medicine storage tank (21) is connected to the rotating drum (23). The top of the rotating drum (23) is arranged accordingly. The outer cylinder surface of the rotating drum (23) is fixedly connected to a drive plate (231) that is spirally arranged along the height direction of the support frame (1). The drive plate (231) and the inner cylinder surface of the dispensing cylinder (22) form a spiral flow channel (230). The inner cylinder surface of the rotating drum (23) near its bottom end is fixedly connected to a stirring rod (232). The dispensing cylinder (22) is provided with a water inlet (220) above the spiral flow channel (230). The water outlet of the spiral flow channel (230) is connected to the inner cavity of the rotating drum (23). The liquid separator (3) has three output ends. The bottom port of the mixing cylinder (22) is connected to the inlet port of the liquid separator (3). The bottom port of the mixing cylinder (22) can be switched to connect with the three output ends of the liquid separator (3). The secondary mixing component (4) includes a drug preparation tank (41) and a stirring mechanism (42). The three drug preparation tanks (41) are fixedly connected to the support frame (1) and respectively connected to the three output ends of the liquid separator (3) through pipelines. The stirring end of the stirring mechanism (42) is located inside the drug preparation tank (41). Water supply component (5), the outlet of the water supply component (5) is connected to the inlet (220) through a pipeline, the water flows through the inlet (220) and enters the mixing cylinder (22) through the spiral flow channel (230), driving the rotating drum (23) to rotate and stir the medicine liquid inside.

2. A chemical dosing device for drilling waste flushing fluid according to claim 1, characterized in that, The premixed component (2) also includes a sieve plate (24), on which sieve holes are evenly opened and fixedly connected to the bottom end of the rotating drum (23).

3. A chemical dosing device for drilling waste flushing fluid according to claim 2, characterized in that, The premixed component (2) also includes a positioning post (25), the bottom end of which is fixedly connected to the inner cylinder surface of the mixing cylinder (22) via a connecting post (26), and the sieve plate (24) has a rotating hole (241) that is arranged and rotatably connected to the positioning post (25).

4. A chemical dosing device for drilling waste flushing fluid according to claim 3, characterized in that, The number of connecting posts (26) is multiple, and they are arranged in a uniform array along the circumference of the positioning posts (25).

5. A chemical dosing device for drilling waste flushing fluid according to claim 1, characterized in that, The premixed component (2) further includes a baffle (27), the surface of the baffle (27) being arranged perpendicularly to and fixedly connected to the surface of the drive plate (231), and there are multiple baffles (27) arranged at uniform intervals along the spiral direction of the drive plate (231).

6. A chemical dosing device for drilling waste flushing fluid according to claim 1, characterized in that, The stirring mechanism (42) includes a servo motor (421) and a stirring blade (422). The servo motor (421) is fixedly connected to the top of the medicine tank (41). The stirring blade (422) is located inside the medicine tank (41) and is connected to the power output end of the servo motor (421).

7. A chemical dosing device for drilling waste flushing fluid according to claim 6, characterized in that, The number of stirring mechanisms (42) is three, which are arranged corresponding to the three medicine dispensing tanks (41).

8. A chemical dosing device for drilling waste flushing fluid according to claim 1, characterized in that, It also includes a dosing pump (6), the inlet of which is connected to the three dosing tanks (41) via a pipeline, and the outlet of which is connected to a container containing waste flushing liquid via a pipeline.

9. A chemical dosing device for drilling waste flushing fluid according to claim 1, characterized in that, The water supply component (5) includes a water supply pump and a water supply pipeline (51). The inlet end of the water supply pump is connected to a water source, and the water supply pipeline (51) is connected between the outlet end of the water supply pump and the inlet (220).

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