Method for synthesizing aminonitroguanidine

Abstract

The invention relates to the technical field of chemical engineering, in particular to a method for synthesizing aminonitroguanidine, which comprises the following steps: S1, adding recycled hydroxylamine into an operation cylinder, adding nitroguanidine, uniformly stirring, adding hydroxylamine, and controlling the adding time of hydroxylamine to be 5-6 hours; s2, heating the stirred raw materials to 60 DEG C for reaction, keeping the temperature and refluxing for 6 hours, cooling to 20 DEG C after the reaction is completed, and then filtering and washing to obtain an amino nitroguanidine crude product; and S3, adding the crude aminonitroguanidine product into the pulping tank, adding clear water, uniformly stirring, and centrifuging in a centrifugal machine to obtain a finished aminonitroguanidine product. According to the preparation method, the nitroguanidine falls into each position of the operation cylinder, so that the subsequent stirring speed is increased, the problem that the nitroguanidine can only be stacked at one position when being put in the past is solved, meanwhile, the content of the aminonitroguanidine is increased to 99%, the yield of the aminonitroguanidine is increased to 90%, and the preparation method is safe, environmentally friendly and suitable for industrial production.

Description

TECHNICAL FIELD

[0001] The application relates to the chemical technology field, in particular to a method for synthesizing aminonitroguanidine. BACKGROUND

[0002] Aminonitroguanidine is a white crystalline powder with wide application. It is mainly used as an intermediate for organic synthesis and a basic raw material for pharmaceutical chemistry. In the field of pharmaceutical production, it can be used to prepare aminoguanidine, the drug Levocarnitin, etc. Aminoguanidine has wide application in chemistry and pharmacy, including serving as a reducing agent, an intermediate for drug synthesis, etc. Levocarnitin is also known as Trapidil, which is mainly used in the clinic for treating and preventing coronary heart disease, angina pectoris, myocardial infarction, etc. Moreover, aminonitroguanidine can also be used for preparing explosives and smokeless gunpowder.

[0003] For this purpose, the prior art patent with the publication number CN109180536A discloses a preparation method of nitroguanylhydrazine. Nitroguanylhydrazine is prepared by reacting guanidine nitrate, concentrated sulfuric acid and hydrazine hydrate. The reaction steps include: guanidine nitrate is dehydrated by concentrated sulfuric acid and then ice-dissolved to obtain nitroguanidine; the nitroguanidine is reacted with hydrazine hydrate at low temperature to obtain nitroguanylhydrazine; and the product nitroguanylhydrazine is obtained by filtering, washing with water and drying.

[0004] However, when aminonitroguanidine is synthesized, the content and yield of aminonitroguanidine are low, the preparation method does not have an environmental protection effect, and when raw materials are put into the production of aminonitroguanidine, the effect of quantitative and dispersed feeding is not good, so that the subsequent stirring process has limitations. Therefore, it is urgent to improve and perfect the above problems. SUMMARY

[0005] The application aims to provide a method for synthesizing aminonitroguanidine to solve the problems in the background art that when aminonitroguanidine is synthesized, the content and yield of aminonitroguanidine are low, the preparation method does not have an environmental protection effect, and when raw materials are put into the production of aminonitroguanidine, the effect of quantitative and dispersed feeding is not good, so that the subsequent stirring process has limitations.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: a method for synthesizing aminonitroguanidine, comprising a bottom plate, the front surface of the bottom plate is fixedly connected with a control panel, the upper surface of the bottom plate is provided with an operation cylinder, the top surface of the bottom plate is provided with a stirring motor, the lower end of the stirring motor is provided with a stirring shaft which penetrates through the top surface of the operation cylinder, the surface of the bottom plate is provided with a discharge pipe on one side, and the upper surface of the operation cylinder is provided with a drop assembly and a feeding assembly from left to right.

[0007] The preparation method is as follows:

[0008] S1, add recovered hydroxylamine to the operating cylinder, add nitro guanidine, stir evenly, then add hydroxylamine, control the adding time of hydroxylamine for 5-6h;

[0009] S2, the stirred raw materials are heated to 60℃ for reaction, and kept at 60℃ for 6h, then cooled to 20℃, followed by filtration and washing to obtain the crude aminonitro guanidine;

[0010] S3, add the crude aminonitro guanidine to the beating tank, stir evenly after adding water, then send to the centrifuge for centrifugation to obtain the finished aminonitro guanidine.

[0011] Preferably, in S1, a proper amount of hydroxylamine is first mixed with nitro guanidine, and stirred evenly, the hydroxylamine in S1 is 50% hydroxylamine, the hydroxylamine in S1 is 50% hydroxylamine, and the adding temperature of hydroxylamine in S1 is less than 50℃.

[0012] Preferably, the adding time of hydroxylamine in S1 is 5-6h, and the molar ratio of nitro guanidine to hydroxylamine in S1 is 1:1.8~2.

[0013] Preferably, the ph of nitro guanidine in S1 is 6-7, and the moisture content of nitro guanidine in S1 is 20%, and the content is 90%.

[0014] Preferably, the feeding assembly comprises a feeding frame, the feeding frame is installed on the top surface of the operating cylinder, the upper surface of the feeding frame is fixedly connected with a feeding frame, the inner bottom wall of the feeding frame is provided with a feeding groove, the inside of the feeding frame is provided with a pushing plate, the right side of the pushing plate is provided with a connecting plate, the front surface of the feeding frame is fixedly connected with a side block, the right side of the side block is provided with a motor frame, the output end of the motor frame is penetratingly installed with a screw rod body in the inside of the side block, the outer surface of the screw rod body is installed with a movable ring, the back surface of the movable ring is fixedly connected with a fixed plate, the fixed plate and the connecting plate are fixedly connected, and the left side of the pushing plate is installed with an inclined block.

[0015] Preferably, the left side of the screw rod body is installed with a connecting shaft, the outer surface of the connecting shaft is installed with a worm, the front surface of the worm is engagedly connected with a worm wheel, the lower end of the worm wheel is installed with a rotating rod, the lower end of the rotating rod is installed with a trapezoidal ring, the rotating rod penetrates through the top surface of the operating cylinder and is connected with the trapezoidal ring, and the outer surface of the trapezoidal ring is uniformly connected with a guide frame.

[0016] Preferably, the dropping assembly comprises a dropping cylinder, the dropping cylinder is installed on the top end surface of the operating cylinder, the right side of the dropping cylinder is installed with a storage cylinder, and the inside of the storage cylinder is provided with a quantitative valve.

[0017] Preferably, the inside of the dropping cylinder is installed with a supporting ring, and the upper surface of the supporting ring is installed with an adsorption sponge.

[0018] Preferably, the left side of the drop material cylinder is provided with a mounting frame, the lower surface of the mounting frame is fixedly connected with an electric push rod body, the lower end surface of the electric push rod body is provided with a squeezing ring, and the squeezing ring is matched with the drop material cylinder.

[0019] Preferably, the outer surface of the operation cylinder is provided with a mounting ring, the inside of the mounting ring is provided with a cavity, the front end of the mounting ring is provided with a water inlet pipe, and the right side of the mounting ring is provided with.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] 1. The method for synthesizing aminonitroguanidine, the feeding assembly can intermittently feed the nitroguanidine fed along with the push plate left and right, and can also disperse the nitroguanidine during feeding, so that the nitroguanidine falls into every part of the operation cylinder, thereby accelerating the subsequent stirring rate, avoiding the problem that the nitroguanidine can only be accumulated in one place during feeding in the past, and increasing the content of aminonitroguanidine to 99% and the yield of aminonitroguanidine to 90%. The preparation method is safe, environmentally friendly, and suitable for industrial production.

[0022] 2. The method for synthesizing aminonitroguanidine, the drop assembly can control the addition time of hydroxylamine to be between five and six hours, and the hydroxylamine can be automatically dropped by the gravity of the adsorption sponge, and the hydroxylamine adsorbed in the adsorption sponge can also be automatically dropped by the extrusion of the squeezing ring. DETAILED DESCRIPTION

[0023] Figure 1 The working process of the structure of the present application is shown in the figure;

[0024] Figure 2 The structure of the present application is shown in the figure;

[0025] Figure 3 The structure of the operation cylinder and the stirring motor of the present application is shown in the figure;

[0026] Figure 4 The structure of the feeding frame and the feeding frame of the present application is shown in the figure;

[0027] Figure 5 The structure of the feeding frame of the present application is shown in the figure;

[0028] Figure 6 The structure of the connecting plate and the push plate of the present application is shown in the figure;

[0029] Figure 7 The structure of the trapezoidal ring and the guide frame of the present application is shown in the figure;

[0030] Figure 8A perspective view of the structure of the drop material cylinder and storage cylinder of the present application;

[0031] Figure 9 A perspective view of the structure of the installation ring and water inlet pipe of the present application; Figure 8 A perspective view of the structure of the installation ring and water inlet pipe of the present application;

[0032] Figure 10 A perspective view of the structure of the installation ring and water inlet pipe of the present application;

[0033] Figure 11 A schematic diagram of the reaction principle of the present application.

[0034] In the figure: 1, bottom plate; 2, control panel; 3, operation cylinder; 4, stirring motor; 5, discharge pipe; 6, feeding frame; 7, feeding frame; 8, feeding slot; 9, pushing plate; 10, connecting plate; 11, side block; 12, motor frame; 13, screw body; 14, movable ring; 15, fixed plate; 16, inclined block; 17, connecting shaft; 18, worm; 19, worm gear; 20, rotating rod; 21, trapezoidal ring; 22, guide frame; 23, drop material cylinder; 24, storage cylinder; 25, supporting ring; 26, adsorption sponge; 27, mounting frame; 28, electric push rod body; 29, extrusion ring; 30, installation ring; 31, water inlet pipe; 32, water outlet pipe. DETAILED DESCRIPTION

[0035] 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.

[0036] Please refer to Figures 1-11 An embodiment provided by the present application:

[0037] A method for synthesizing amino nitro guanidine, the control panel 2, stirring motor 4, motor frame 12, adsorption sponge 26 and electric push rod body 28 used in the present application are all products that can be directly purchased on the market, and their principles and connection modes are all prior art known to those skilled in the art, so they will not be described here. It includes a bottom plate 1, the front surface of the bottom plate 1 is fixedly connected with a control panel 2, the upper surface of the bottom plate 1 is installed with an operation cylinder 3, the top surface of the bottom plate 1 is installed with a stirring motor 4, the lower end of the stirring motor 4 penetrates through the top surface of the operation cylinder 3 and is installed with a stirring shaft, the surface of the bottom plate 1 is installed with a discharge pipe 5 on one side, and the upper surface of the operation cylinder 3 is installed with a drop material assembly and a feeding assembly from left to right in sequence;

[0038] The preparation method is as follows:

[0039] S1. Add the recovered hydroxylamine and nitroguanidine to the operating cylinder 3, stir evenly, and then add hydroxylamine. Control the addition time of hydroxylamine to 5-6 hours.

[0040] S2. The stirred raw material is heated to 60°C and reacted. The mixture is kept under reflux for 6 hours. After the reaction is completed, it is cooled to 20°C. Then, it is filtered and washed to obtain crude aminonitroguanidine.

[0041] S3. Add crude aminonitroguanidine to the pulping tank, add water, stir evenly, and then send it to a centrifuge for centrifugation to obtain the finished aminonitroguanidine product.

[0042] In step S1, a suitable amount of hydroxylamine and nitroguanidine are first added and mixed thoroughly. The hydroxylamine in S1 is 50% hydroxylamine, and the addition temperature of the hydroxylamine in S1 should be below 50°C. The addition time of the hydroxylamine in S1 is 5-6 hours, and the molar ratio of nitroguanidine to hydroxylamine in S1 is 1:1.8~2. The pH of the nitroguanidine in S1 is 6-7, and the water content of the nitroguanidine in S1 is 20%, with a content of 90%. The innovations of this invention are: low raw material cost, simple reaction process, mild reaction conditions, safe and environmentally friendly preparation method, high raw material recovery rate, and the hydroxylamine in the filtrate can be reused in the next batch of reaction after concentration.

[0043] This embodiment discloses a method for synthesizing aminonitroguanidine. The preparation method involves reacting nitroguanidine with 50% hydroxylamine to prepare aminonitroguanidine. The specific steps of the preparation method are as follows:

[0044] Add 55g of 50% hydroxylamine and 145g of nitroguanidine to a 500ml four-necked flask, stir well, and then add 78g of 50% hydroxylamine dropwise over a period of 5 hours. After the addition is complete, heat to 60℃ and maintain this temperature for 6 hours. Cool to 20℃ and filter. Rinse the filter cake twice with a small amount of water and weigh 140.5g. A small amount of the filter cake was tested and found to have a moisture content of 23%, indicating a purity of 99.1%. In this example, the aminonitroguanidine content was 99%, and the yield was 90%.

[0045] The feeding assembly includes a feeding frame 6, which is installed on the top surface of the operating cylinder 3. A feeding frame 7 is fixedly connected to the upper surface of the feeding frame 6. A feeding groove 8 is opened in the inner bottom wall of the feeding frame 6. A pusher plate 9 is installed inside the feeding frame 6. A connecting plate 10 is installed on the right side of the pusher plate 9. A side block 11 is fixedly connected to the front surface of the feeding frame 6. A motor frame 12 is installed on the right side of the side block 11. A lead screw body 13 is installed through the inside of the side block 11 at the output end of the motor frame 12. A movable ring 14 is installed on the outer surface of the lead screw body 13. A fixing plate 15 is fixedly connected to the back of the movable ring 14. The fixing plate 15 is fixedly connected to the connecting plate 10. An inclined block 16 is installed on the left side of the pusher plate 9. A connecting shaft 17 is installed on the left side of the lead screw body 13. A worm 18 is installed on the outer surface of the connecting shaft 17. A worm wheel 19 is meshed with the front surface of the worm 18. A rotating rod 20 is installed at the lower end of the worm wheel 19. A trapezoidal ring 21 is installed at the lower end of the rotating rod 20. The rotating rod 20 passes through the top surface of the operating cylinder 3 and is connected to the trapezoidal ring 21. Guide frames 22 are evenly connected to the outer surface of the trapezoidal ring 21. First, recycled hydroxylamine is added to the inside of the operating cylinder 3. Then, nitroguanidine is added through the feeding frame 7, which then enters the feeding rack 6. The motor frame 12 is then activated, causing the lead screw body 13 to rotate. The movable ring 14 then reciprocates left and right on the outer surface of the lead screw body 13. The movable ring 14 then moves the fixed plate 15 and connecting plate 10 to the left. The connecting plate 10 continues to move the pusher plate 9 and inclined block 16 to the left. At this time, the inclined block 16 pushes the nitroguanidine at the bottom of the feeding rack 6 into the feed trough 8, which is connected to the operating cylinder 3. The nitroguanidine then enters the operating cylinder 3, and the pusher plate 9 moves back and forth, intermittently adding nitroguanidine to the bottom wall of the feeding rack 6. Simultaneously, the rotation of the lead screw body 13... The moving connecting shaft 17 and the worm gear 18 rotate, and then the worm gear 18 meshes with the worm wheel 19. At this time, the worm wheel 19 will drive the rotating rod 20 to rotate, and the rotating rod 20 will drive the trapezoidal ring 21 and the guide frame 22 to rotate. When the trapezoidal ring 21 rotates, the guide frame 22 will rotate below the pusher plate 9. At the same time, the top surface of the guide frame 22 is triangular, which can guide and disperse the nitroguanidine to be fed, so that the nitroguanidine is evenly dropped into the inside of the operating cylinder 3. The operation can be repeated. This setting can intermittently feed the nitroguanidine by following the left and right movement of the pusher plate 9 through the feeding component. At the same time, the nitroguanidine can also be dispersed during the feeding process, so that the nitroguanidine falls into every part of the operating cylinder 3, thereby speeding up the subsequent stirring rate and avoiding the problem that the nitroguanidine can only accumulate in one place when it is fed in the past.

[0046] The dispensing assembly includes a dispensing cylinder 23, which is mounted on the top surface of the operating cylinder 3. A storage cylinder 24 is mounted on the right side of the dispensing cylinder 23, and a metering valve is installed inside the storage cylinder 24. A support ring 25 is mounted on the inner wall of the dispensing cylinder 23, and an absorbent sponge 26 is mounted on the upper surface of the support ring 25. A mounting bracket 27 is mounted on the left side of the dispensing cylinder 23, and an electric actuator body 28 is fixedly connected to the lower surface of the mounting bracket 27. A compression ring 29 is mounted on the lower end surface of the electric actuator body 28, and the compression ring 29 is compatible with the dispensing cylinder 23. An installation ring 30 is mounted on the outer surface of the operating cylinder 3. The installation ring 30 has a cavity inside, an inlet pipe 31 is mounted on the front end of the installation ring 30, and an outlet pipe 32 is mounted on the right side of the installation ring 30. After the nitroguanidine is completely added to the operating cylinder 3 and stirred evenly, the hydroxylamine raw material is stored inside the storage cylinder 24. Then, a metering valve inside the storage cylinder 24 can quantitatively deliver the hydroxylamine to the dripping cylinder 23. When the hydroxylamine is delivered to the dripping cylinder 23, it first enters the adsorption sponge 26. When there is a large amount of hydroxylamine inside the adsorption sponge 26, it will slowly drip downwards, thus falling through the dripping cylinder 23 into the operating cylinder 3, completing the addition of hydroxylamine. When the hydroxylamine in the storage cylinder 24 is added... Once completed, the electric actuator body 28 is activated, which drives the compression ring 29 to move downwards. At this time, the compression ring 29 can slowly apply pressure to the adsorption sponge 26, thereby squeezing out the hydroxylamine inside the adsorption sponge 26. Thus, the hydroxylamine can also be placed into the operating cylinder 3. Therefore, this setting can control the addition time of hydroxylamine to between five and six hours through the dripping component. The hydroxylamine is automatically dripped under the gravity of the adsorption sponge 26, and the compression of the compression ring 29 can also make the adsorbed hydroxylamine inside the adsorption sponge 26 automatically drip.

[0047] Working Principle: When using this device, the operator first connects it to an external power source to provide power. First, the recovered hydroxylamine is added to the inside of the operating cylinder 3. Then, nitroguanidine is added through the feeding frame 7, which then enters the feeding rack 6. The motor frame 12 is then activated, causing the lead screw body 13 to rotate. The movable ring 14 then reciprocates left and right on the outer surface of the lead screw body 13. The movable ring 14 then drives the fixed plate 15 and connecting plate 10 to move to the left. The connecting plate 10 continues to drive the pusher plate 9 and inclined block 16 to move to the left. At this time, the inclined block 16 pushes the nitroguanidine at the bottom of the feeding rack 6 into the feed trough 8. The feeding rack 6 is connected to the operating cylinder 3. Nitroguanidine enters the interior of the operating cylinder 3 and moves back and forth on the pusher plate 9. This allows for the intermittent feeding of nitroguanidine from the bottom wall of the feeding rack 6. At the same time, the rotation of the screw body 13 drives the connecting shaft 17 and the worm gear 18 to rotate. The worm gear 18 meshes with the worm wheel 19. The worm wheel 19 drives the rotating rod 20 to rotate. The rotating rod 20 drives the trapezoidal ring 21 and the guide frame 22 to rotate. When the trapezoidal ring 21 rotates, the guide frame 22 rotates below the pusher plate 9. The top surface of the guide frame 22 is triangular, which guides and disperses the fed nitroguanidine, allowing it to fall evenly into the interior of the operating cylinder 3. The operation can be repeated cyclically.

[0048] After the nitroguanidine is completely added to the operating cylinder 3 and stirred evenly, the hydroxylamine raw material is stored inside the storage cylinder 24. Then, a metering valve inside the storage cylinder 24 can quantitatively deliver the hydroxylamine to the dripping cylinder 23. When the hydroxylamine is delivered to the dripping cylinder 23, it first enters the adsorption sponge 26. When there is a large amount of hydroxylamine inside the adsorption sponge 26, it will slowly drip downwards, thus falling through the dripping cylinder 23 into the operating cylinder 3, completing the addition of hydroxylamine. After the hydroxylamine is added to the storage cylinder 24, the electric actuator body 28 is activated. The electric actuator body 28 drives the extrusion ring 29 to move downward. At this time, the extrusion ring 29 can slowly apply pressure to the adsorption sponge 26, so that the hydroxylamine inside the adsorption sponge 26 will be squeezed out. Then, the temperature is raised to 60°C for reaction, and the temperature is kept under reflux for 6 hours. After the reaction is completed, the temperature is cooled to 20°C, filtered, washed, and the crude aminonitroguanidine product is obtained. The crude product is rinsed with water, pulped and centrifuged to obtain the finished aminonitroguanidine product. The above is the working principle of the present invention.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A kind of synthetic amino nitro guanidine method, including bottom plate (1), the front surface of the bottom plate (1) is fixedly connected with control panel (2), the upper surface of the bottom plate (1) is installed with operating cylinder (3), the top surface of the bottom plate (1) is installed with stirring motor (4), the lower end of the stirring motor (4) is installed with stirring shaft, which penetrates the top surface of operating cylinder (3), the surface side of the bottom plate (1) is installed with discharge pipe (5), it is characterized by: The upper surface of the operating cylinder (3) is sequentially provided with a dropping assembly and a feeding assembly from left to right; The preparation method is as follows: S1, adding recovered hydroxylamine into the operating cylinder (3), adding nitro guanidine, stirring uniformly, then adding hydroxylamine, and controlling the adding time of hydroxylamine to be 5-6 hours; S2, after the stirred raw materials are heated to 60 DEG C and reacted for 6 hours, the reaction is completed, and then the temperature is cooled to 20 DEG C, followed by filtering and washing to obtain the crude aminonitro guanidine; S3, adding the crude aminonitro guanidine into the beating tank, stirring uniformly after adding water, and then feeding into the centrifuge to obtain the finished aminonitro guanidine.

2. The process for the synthesis of aminonitroguanidine according to claim 1, characterized by the fact that: In S1, a proper amount of hydroxylamine is mixed with nitro guanidine, and stirred uniformly, the hydroxylamine in S1 is 50% hydroxylamine, the hydroxylamine in S1 is 50% hydroxylamine, and the adding temperature of hydroxylamine in S1 is less than 50 DEG C.

3. The method of claim 1, wherein: The adding time of hydroxylamine in S1 is 5-6 hours, and the molar ratio of nitro guanidine to hydroxylamine in S1 is 1:1.8-2.

4. The method of claim 1, wherein: The ph of nitro guanidine in S1 is 6-7, and the moisture content of nitro guanidine in S1 is 20%, and the content is 90%.

5. The method of claim 1, wherein: The feeding assembly comprises a feeding frame (6), the feeding frame (6) is installed on the top surface of the operating cylinder (3), the upper surface of the feeding frame (6) is fixedly connected with a feeding frame (7), the inner bottom wall of the feeding frame (6) is provided with a feeding groove (8), the inside of the feeding frame (6) is provided with a pushing plate (9), the right side of the pushing plate (9) is provided with a connecting plate (10), the front surface of the feeding frame (6) is fixedly connected with a side block (11), the right side of the side block (11) is provided with a motor frame (12), the output end of the motor frame (12) penetrates the inside of the side block (11) and is provided with a screw rod body (13), the outer surface of the screw rod body (13) is provided with a movable ring (14), the back surface of the movable ring (14) is fixedly connected with a fixed plate (15), the fixed plate (15) and the connecting plate (10) are fixedly connected, and the left side of the pushing plate (9) is provided with an inclined block (16).

6. The method of claim 5, wherein: The left side of the screw rod body (13) is provided with a connecting shaft (17), the outer surface of the connecting shaft (17) is provided with a worm (18), the front surface of the worm (18) is engagedly connected with a worm wheel (19), the lower end of the worm wheel (19) is provided with a rotating rod (20), the lower end of the rotating rod (20) is provided with a trapezoidal ring (21), the rotating rod (20) penetrates the top surface of the operating cylinder (3) and is connected with the trapezoidal ring (21), and the outer surface of the trapezoidal ring (21) is uniformly connected with a guide frame (22).

7. The method of claim 1, wherein: The dropping assembly comprises a dropping cylinder (23), the dropping cylinder (23) is installed on the top surface of the operating cylinder (3), the right side of the dropping cylinder (23) is provided with a storage cylinder (24), and the inside of the storage cylinder (24) is provided with a quantitative valve.

8. The method of claim 7, wherein: The inside of the dropping cylinder (23) is provided with a supporting ring (25), and the upper surface of the supporting ring (25) is provided with an adsorption sponge (26).

9. The method of claim 7, wherein: The left side of the drop material cylinder (23) is provided with a mounting frame (27), the lower surface of the mounting frame (27) is fixedly connected with an electric push rod body (28), the lower end surface of the electric push rod body (28) is provided with an extrusion ring (29), and the extrusion ring (29) is matched with the drop material cylinder (23).

10. The method of claim 1, wherein: The outer surface of the operating cylinder (3) is provided with a mounting ring (30), the inside of the mounting ring (30) is provided with a cavity, the front end of the mounting ring (30) is provided with a water inlet pipe (31), and the right side of the mounting ring (30) is provided with a water outlet pipe (32).

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