Integrated material proportioning, mixing and conveying system based on weight identification

Abstract

The application belongs to the technical field of material conveying and specifically relates to an integrated material proportioning and mixing conveying system based on weight identification, which comprises a mixing line, the mixing line comprises an A material system, a B material system and a mixer, the A material system comprises a raw material cavity, a conveying pump one, a material conveying pipe, a pneumatic valve one, an A1 tank, an A2 tank, an A auxiliary material pipe, a pneumatic valve two, a pneumatic valve three, a conveying pump two, a pneumatic valve four and a circulating pipe, the pneumatic valve one is connected with the raw material cavity through the material conveying pipe, the conveying pump one is arranged in the material conveying pipe, the A1 tank and the A2 tank are both connected with the pipeline of the pneumatic valve one, the pneumatic valve two is connected with the A1 tank and the A2 tank through the A auxiliary material pipe and is connected with the external A auxiliary material pipeline, and the pneumatic valve three is connected with the bottom pipeline of the A1 tank and the A2 tank, and the device solves the problem that the remaining material in the raw material cavity cannot be quickly stirred and dispersed after solidification when the material is proportioned and mixed at present, thereby ensuring the smooth pumping of the pump body.

Description

Technical Field

[0001] This invention belongs to the technical field of material conveying, specifically relating to an integrated material proportioning and mixing conveying system based on weight recognition. Background Technology

[0002] When materials are mixed, there will be residual materials in the raw material chamber after mixing for subsequent mixing. Since some materials are easy to solidify, they will solidify after standing in the raw material chamber for a period of time, becoming a solid-liquid mixture. When the raw material is extracted again, the pump requires high energy consumption, or may even fail to extract the raw material smoothly. Compared with directly using a mixer for mixing, this solution can save energy consumption, and the overall structure is simple and low cost. Moreover, the mixer needs to stir continuously, while this solution can quickly re-stir the raw material after it solidifies and turn it back into a flowing liquid. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated material proportioning and mixing conveying system based on weight recognition, so as to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an integrated material proportioning and mixing conveying system based on weight recognition, comprising a mixing line, wherein the mixing line includes an A-material system, a B-material system, and a mixer; the A-material system includes a raw material chamber, a first conveying pump, a conveying pipe, a first pneumatic valve, an A1 tank, an A2 tank, an A auxiliary material pipe, a second pneumatic valve, a third pneumatic valve, a second conveying pump, a fourth pneumatic valve, and a circulation pipe; the first pneumatic valve is connected to the raw material chamber through the conveying pipe, and the first conveying pump is located in... Inside the conveying pipe, tanks A1 and A2 are both connected to pneumatic valve one. Pneumatic valve two is connected to tanks A1 and A2 through auxiliary material A pipe and is also connected to an external auxiliary material A pipe. Pneumatic valve three is connected to the bottom pipes of tanks A1 and A2. Conveying pump two is connected to pneumatic valve three and pneumatic valve four pipes respectively. Pneumatic valve four is connected to the top of tank A2 through a circulation pipe and is also connected to a mixer pipe. Weight sensors are installed at the bottom of tanks A1 and A2.

[0005] The present invention further explains that the B material system includes a premixing tank, an electric valve, a working tank, a third conveying pump, a fifth pneumatic valve, and a return pipe; the premixing tank is connected to the working tank via the electric valve, the working tank is equipped with a meter, the meter is electrically connected to the electric valve, the working tank is connected to the fifth pneumatic valve via the third conveying pump, the fifth pneumatic valve is connected to the top of the working tank via the return pipe, the fifth pneumatic valve is connected to the mixer via a pipe, and a stirrer is installed inside the A1 tank, A2 tank, premixing tank, and working tank.

[0006] The present invention further illustrates that the raw material chamber is provided with a raw material anti-coagulation mechanism, which includes a stirring shaft, two stirring plates, two clamping plates, a clamping shaft, a rotating shaft, and a rocker wheel; the two stirring plates are respectively fixed to the upper and lower sides of the stirring shaft, a through hole is provided on one side of the raw material chamber, and one end of the stirring shaft is slidably connected to the through hole, the rotating shaft bearing is installed on one side of the raw material chamber, and both ends are respectively connected to the rocker wheel and the clamping shaft, the two clamping plates are respectively fixed to the upper and lower sides of one end of the stirring shaft, and a round block is fixed on the inner side of each plate, and the plate is connected to the clamping shaft through the round block.

[0007] The present invention further illustrates that the outer ring of the snap-fit ​​shaft is evenly provided with two V-shaped grooves, and the snap-fit ​​plate is snapped into the V-shaped grooves by a round block.

[0008] The present invention further illustrates that one end of the rotating shaft is fixed to the snap-fit ​​shaft, and a threaded hole is provided inside the shaft. A screw is threadedly connected to the threaded hole, and one end of the screw is fixed to the rocker wheel.

[0009] The present invention further illustrates that a connecting rod is fixed to the other end of the screw, and a top block is fixed to the outer side of the connecting rod; a slot is provided in the middle of the stirring plate, and an expansion plate is inserted into the slot; a top rod is fixed to the inner side of the expansion plate; holes are provided on both the upper and lower sides of the stirring shaft, and the top rod is slidably connected to the holes; a limit block is provided at the inner end of the top rod, and a spring is provided between the limit block and the inner wall of the stirring shaft; the lower end of the top rod and the edge of the top block are both arc-shaped, and after the connecting rod moves, the top block and the top rod come into contact with each other.

[0010] The present invention further illustrates that both the surface of the stirring plate and the surface of the expansion plate are provided with circular holes. In the initial state, the circular holes of the stirring plate and the circular holes of the expansion plate are offset from each other. After the expansion plate is moved, the circular holes of the stirring plate and the circular holes of the expansion plate are aligned with each other.

[0011] The present invention further illustrates that one end of the agitator shaft is provided with a sliding hole, and the connecting rod is slidably connected in the sliding hole.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention uses a raw material anti-coagulation mechanism to agitate the raw material, thereby dispersing the slightly coagulated raw material and turning it back into a liquid with better fluidity, so as to facilitate the extraction by the pump. This can relatively reduce the energy consumption of the pump and even avoid the phenomenon of extraction failure due to severe coagulation of the raw material. Furthermore, by moving the circular block in the V-shaped groove, the agitator shaft moves laterally left and right, thereby fully agitating the raw material in the raw material chamber during the agitation process, improving the agitation efficiency, so that the pump can extract the raw material in the first time.

[0013] Furthermore, the lever arm can be freely lengthened, making stirring easier and smoother, and relatively accelerating the stirring efficiency. At the same time, the increased length of the lever arm increases the coverage area of ​​the stirred material and the amount of stirring, which can further improve the speed of material dispersion and further reduce effort. This allows the material to flow through the round hole, thereby reducing the resistance when the stirring plate stirs the material. It saves effort while speeding up the stirring speed, thus increasing the stirring efficiency. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the raw material chamber of the present invention;

[0017] Figure 3 This is a schematic diagram of the internal structure of the raw material chamber of the present invention;

[0018] Figure 4 This is a schematic diagram of the raw material anti-coagulation mechanism of the present invention;

[0019] Figure 5 This is a schematic diagram of the internal structure of the stirring shaft, the snap-fit ​​shaft, and the rotating shaft of the present invention.

[0020] Figure 6 This is an exploded view of the raw material anti-coagulation mechanism of the present invention;

[0021] Figure 7 This is a schematic diagram of the V-groove of the snap-fit ​​shaft of the present invention;

[0022] Figure 8 This is a schematic diagram showing the direction of movement of the stirring shaft after the rocker wheel rotates according to the present invention;

[0023] Figure 9 This is a schematic diagram of Embodiment 1 of the present invention;

[0024] Figure 10 These are schematic diagrams of Embodiments 2 and 3 of the present invention;

[0025] Figure 11 This is a schematic diagram of Embodiment 4 of the present invention;

[0026] In the diagram: 1. Mixer; 11. Raw material chamber; 111. Stirring shaft; 112. Stirring plate; 1121. Expansion plate; 1122. Top rod; 113. Snap-fit ​​plate; 114. Snap-fit ​​shaft; 115. Rotating shaft; 116. Rocker wheel; 117. Screw; 118. Connecting rod; 119. Top block; 12. Conveying pipe; 13. Pneumatic valve one; 14. Conveying pump one; 15. Tank A1; 16. Tank A2; 17. Auxiliary material pipe; 18. Pneumatic valve two; 191. Pneumatic valve three; 192. Conveying pump two; 193. Pneumatic valve four; 194. Circulation pipe; 21. Premixing tank; 22. Electric valve; 23. Working tank; 24. Conveying pump three; 25. Pneumatic valve five; 26. Return pipe. Detailed Implementation

[0027] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-11 The present invention provides a technical solution: an integrated material proportioning and mixing conveying system based on weight recognition, including a mixing line, the mixing line including an A material system, a B material system and a mixer 1, the A material system including a raw material chamber 11, a conveying pump 14, a conveying pipe 12, a pneumatic valve 13, an A1 tank 15, an A2 tank 16, an A auxiliary material pipe 17, a pneumatic valve 2 18, a pneumatic valve 3 191, a conveying pump 2 192, a pneumatic valve 4 193 and a circulation pipe 194;

[0029] Pneumatic valve 13 is connected to raw material chamber 11 through conveying pipe 12. Conveying pump 14 is installed inside conveying pipe 12. Tanks A1 15 and A2 16 are both connected to pneumatic valve 13. Pneumatic valve 2 18 is connected to tanks A1 15 and A2 16 through auxiliary material pipe 17 and is also connected to external auxiliary material pipe. Pneumatic valve 3 191 is connected to the bottom pipes of tanks A1 15 and A2 16. Conveying pump 2 192 is connected to pneumatic valve 3 191 and pneumatic valve 4 193 respectively. Pneumatic valve 4 193 is connected to the top of tank A2 16 through circulation pipe 194 and is connected to mixer 1. Weight sensors are installed at the bottom of tanks A1 15 and A2 16.

[0030] The conveying pump 14 starts, the pneumatic valve 13 opens tank A1 15 and closes tank A2 16, drawing raw material from the raw material chamber 11 and sending it into tank A1 15 through the conveying pipe 12. The weight sensor sets the weight, and the conveying stops when the material in tank A1 15 reaches the set weight. Then, the pneumatic valve 13 switches to feeding tank A2 16. The weight sensor senses the weights of tanks A1 15 and A2 16, thereby controlling the operating status of the pneumatic valve 13 and the conveying pump 14. Simultaneously, the materials in tanks A1 15 and A2 16 are mixed. To increase production, after the raw materials are delivered, auxiliary materials are added in proportion. The weight sensor sends a signal to pneumatic valve 18, and the auxiliary materials are added into tanks A1 15 and A2 16. The agitator starts working and disperses and mixes the materials evenly according to the set speed and time to form complete material A. Then, pneumatic valve 191 opens to discharge the material, and pneumatic valve 193 closes. Conveying pump 192 transports the material A in tanks A1 15 and A2 16 and circulates it through circulation pipe 194. After the flow rate of material A stabilizes, the quality is calibrated as required.

[0031] The B material system includes a premix tank 21, an electric valve 22, a working tank 23, a three-stage transfer pump 24, a five-stage pneumatic valve 25, and a loop pipe 26;

[0032] The premix tank 21 is connected to the working tank 23 via an electric valve 22. The working tank 23 is equipped with a meter, which is electrically connected to the electric valve 22. The working tank 23 is connected to the pneumatic valve 25 via a transfer pump 3 24. The pneumatic valve 25 is connected to the top of the working tank 23 via a return pipe 26. The pneumatic valve 25 is also connected to the mixer 1 via a pipe. Agitators are installed inside the A1 tank 15, A2 tank 16, premix tank 21, and working tank 23.

[0033] Material B is metered and placed into premix tank 21, and stirred evenly by a mixer. The metering device is turned on, and electric valve 22 operates according to the settings. When the amount of material B in working tank 23 reaches 30%, the metering device sends a signal to electric valve 22, causing it to open automatically and transfer material B from premix tank 21 into working tank 23. Pneumatic valve 5 25 is closed, and conveying pump 3 24 is started, circulating through loop pipe 26. After the flow rate of material B stabilizes, it is calibrated as required. Then, material A and material B are simultaneously fed into mixer 1, mixed, and then distributed.

[0034] The raw material chamber 11 is equipped with a raw material anti-coagulation mechanism, which includes an agitator shaft 111, two agitator plates 112, two locking plates 113, a locking shaft 114, a rotating shaft 115, and a rocker wheel 116.

[0035] Two stirring plates 112 are fixed to the upper and lower sides of the stirring shaft 111 respectively. A through hole is provided on one side of the raw material chamber 11, and one end of the stirring shaft 111 is slidably connected in the through hole. The rotating shaft 115 bearing is installed on one side of the raw material chamber 11, and both ends are connected to the rocker wheel 116 and the snap-fit ​​shaft 114 respectively. Two snap-fit ​​plates 113 are fixedly installed on the upper and lower sides of one end of the stirring shaft 111 respectively, and round blocks are fixed on the inner side of each plate, and are connected to the snap-fit ​​shaft 114 through the round blocks.

[0036] After a portion of the raw material in the raw material chamber 11 is extracted, the remaining raw material remains in a static state for a long time, resulting in slight solidification. If it is necessary to continue extracting the raw material, the rocker wheel 116 can be shaken before extraction, causing it to drive the locking shaft 114 to rotate via the rotating shaft 115. The locking shaft 114 drives the stirring shaft 111 to rotate via the locking plate 113, thereby causing the stirring plate 112 to rotate around its center and stir the raw material. This disperses the slightly solidified raw material, turning it back into a liquid with better fluidity, which facilitates extraction by the transfer pump 14. This can relatively reduce the pump's energy consumption and even prevent extraction failure due to severe solidification of the raw material.

[0037] The outer ring of the snap-fit ​​shaft 114 is evenly provided with two V-shaped grooves, and the snap-fit ​​plate 113 is snapped into the V-shaped groove by a round block;

[0038] like Figure 8 As shown, during the rotation of the snap-fit ​​shaft 114, the round block slides in its V-shaped groove, thereby driving the agitator shaft 111 to move laterally through the snap-fit ​​plate 113. The movement of the round block in the V-shaped groove causes the agitator shaft 111 to move laterally left and right, thereby fully agitating the raw material in the raw material chamber 11 during the agitation process, improving the agitation efficiency, so that the pump can extract the raw material in the first time.

[0039] One end of the rotating shaft 115 is fixed to the snap-fit ​​shaft 114, and a threaded hole is provided inside. A screw 117 is threadedly connected inside the threaded hole, and one end of the screw 117 is fixed to the rocker wheel 116.

[0040] When the rocker wheel 116 rotates, it drives the snap-fit ​​shaft 114 to rotate via the screw 117.

[0041] Example 1:

[0042] like Figure 9 As shown, there is a lot of remaining raw material in the raw material chamber 11. When solidification occurs, the raw material at the bottom of the raw material chamber 11 is affected by the pressure of the raw material above, making it difficult to stir. At this time, the operator holds the rotating shaft 115 and then rotates the screw 117, so that the rotating shaft 115 moves laterally while rotating through the internal threaded hole, thereby lengthening the distance between the rocker wheel 116 and the rotating shaft 115, thereby lengthening the lever arm, making stirring easier, smoother, and relatively faster.

[0043] The other end of the screw 117 is fixed with a connecting rod 118, and a top block 119 is fixed to the outside of the connecting rod 118;

[0044] A slot is provided in the middle of the stirring plate 112, and an expansion plate 1121 is inserted into the slot. A push rod 1122 is fixed on the inner side of the expansion plate 1121. Holes are provided on both the upper and lower sides of the stirring shaft 111, and the push rod 1122 is slidably connected in the holes. A limit block is provided at the inner end of the push rod 1122, and a spring is provided between the limit block and the inner wall of the stirring shaft 111.

[0045] The lower end of the push rod 1122 and the edge of the top block 119 are both arc-shaped, and after the connecting rod 118 moves, the top block 119 and the push rod 1122 come into contact with each other.

[0046] Example 2:

[0047] like Figure 10 As shown, when the lever arm of the screw 117 is extended, the stirring is less labor-intensive. At the same time, the screw 117 drives the top block 119 to move laterally through the connecting rod 118 until the top block 119 and the top rod 1122 come into contact with each other and lift the top rod 1122. The spring is deformed by the force, and at the same time, it drives the expansion plate 1121 to slide in the slot, thereby extending the stirring plate 112 and relatively increasing the coverage of the stirring plate 112. At this time, the coverage of the stirred raw material is increased, the stirring amount is increased, and the speed of stirring the raw material can be further improved.

[0048] Both the surface of the stirring plate 112 and the surface of the expansion plate 1121 are provided with round holes. In the initial state, the round holes of the stirring plate 112 and the round holes of the expansion plate 1121 are offset from each other. After the expansion plate 1121 moves, the round holes of the stirring plate 112 and the round holes of the expansion plate 1121 are aligned with each other.

[0049] Example 3:

[0050] like Figure 10 As shown, when there is little remaining material, the force required for stirring is small. In this case, the lever arm is not lengthened, so the expansion plate 1121 does not extend beyond the stirring plate 112. The circular holes on the expansion plate 1121 and the circular holes on the stirring plate 112 are misaligned, preventing the material from flowing through the circular holes. This ensures more comprehensive stirring and guarantees stirring efficiency. Conversely, when there is a lot of remaining material, the force required for stirring is larger. In this case, the lever arm is lengthened, and the expansion plate 1121 extends beyond the stirring plate 112. The circular holes are aligned with each other. To further save effort, the material flows through the circular holes, thereby reducing the resistance when the stirring plate 112 stirs the material. This saves effort while speeding up the stirring speed, thus increasing stirring efficiency.

[0051] One end of the stirring shaft 111 is provided with a sliding hole, and the connecting rod 118 is slidably connected in the sliding hole;

[0052] Example 4:

[0053] like Figure 11 As shown, when there is a lot of remaining raw material, the top block 119 and the top rod 1122 are in contact and pressing against each other. When the rocker wheel 116 is shaken, the connecting rod 118 remains stationary, while the stirring shaft 111 moves laterally left and right. The stirring shaft 111 moves to the left relative to the connecting rod 118 until the top rod 1122 and the top block 119 are no longer in contact. Then the stirring shaft 111 returns, and the top rod 1122 and the top block 119 re-engage, causing the expansion plate 1121 to move back and forth continuously. The round holes are first aligned and then staggered. At this time, there is a lot of raw material above and the pressure is high. This not only saves the effort of stirring the raw material, but also does not affect the full mixing of the raw material.

[0054] It has a simple structure and low manufacturing cost. The energy consumption of the entire system can be reduced by manual cranking. The stirring force can also be adjusted by itself. Alternatively, the crank 116 can be replaced with an electric one to save on the power consumption of the electric motor and fully re-stir the solidified raw materials.

[0055] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated material proportioning, mixing and conveying system based on weight recognition, comprising a mixing line, characterized in that: The mixing line comprises an A material system, a B material system and a mixer (1), the A material system comprises a raw material cavity (11), a conveying pump one (14), a conveying pipe (12), a pneumatic valve one (13), an A1 tank (15), an A2 tank (16), an A auxiliary material pipe (17), a pneumatic valve two (18), a pneumatic valve three (191), a conveying pump two (192), a pneumatic valve four (193) and a circulating pipe (194); The pneumatic valve one (13) is connected with the raw material cavity (11) through the conveying pipe (12), the conveying pump one (14) is arranged in the conveying pipe (12), the A1 tank (15) and the A2 tank (16) are both connected with the pneumatic valve one (13) pipeline, the pneumatic valve two (18) is connected with the A1 tank (15) and the A2 tank (16) through the A auxiliary material pipe (17) and connected with the external A auxiliary material pipeline, the pneumatic valve three (191) is connected with the bottom pipeline of the A1 tank (15) and the A2 tank (16), the conveying pump two (192) is connected with the pneumatic valve three (191) and the pneumatic valve four (193) pipeline respectively, the pneumatic valve four (193) is connected with the upper side of the A2 tank (16) through the circulating pipe (194), the pneumatic valve four (193) is connected with the mixer (1) pipeline, and the bottom of the A1 tank (15) and the A2 tank (16) is provided with a weight sensor; The inside of the raw material cavity (11) is provided with a raw material anti-solidification mechanism, the raw material anti-solidification mechanism comprises an agitation shaft (111), two agitation plates (112), two clamping plates (113), a clamping shaft (114), a rotating shaft (115) and a rocking wheel (116); The two agitation plates (112) are fixed on the upper and lower sides of the agitation shaft (111) respectively, one side of the raw material cavity (11) is provided with a through hole, and one end of the agitation shaft (111) is connected in the through hole in a sliding mode, the rotating shaft (115) is bearing mounted on one side of the raw material cavity (11), and the two ends are connected with the rocking wheel (116) and the clamping shaft (114) respectively, the two clamping plates (113) are fixedly installed on the upper and lower sides of one end of the agitation shaft (111), and the inner sides are fixed with circular blocks, and the circular blocks are connected with the clamping shaft (114); The outer circle of the clamping shaft (114) is uniformly provided with two V-shaped grooves, and the clamping plate (113) is clamped in the V-shaped groove through the circular block; One end of the rotating shaft (115) is fixed with the clamping shaft (114), and a threaded hole is arranged in the inside, a screw rod (117) is screwed in the threaded hole, and one end of the screw rod (117) is fixed with the rocking wheel (116); The other end of the screw rod (117) is fixed with a connecting rod (118), and the outer side of the connecting rod (118) is fixed with a top block (119). The middle of the stirring plate (112) is provided with a slot, and the slot is inserted with an expansion plate (1121), the inner side of the expansion plate (1121) is fixed with a top rod (1122), the upper and lower sides of the stirring shaft (111) are both provided with a hole, and the top rod (1122) is slidingly connected in the hole, the inner end of the top rod (1122) is provided with a limiting block, and the limiting block and the inner wall of the stirring shaft (111) are provided with a spring therebetween; The lower end of the top rod (1122) and the edge of the top block (119) are both arc-shaped, and after the connecting rod (118) moves, the top block (119) and the top rod (1122) are in contact with each other; The surface of the stirring plate (112) and the surface of the expansion plate (1121) are both provided with a round hole, and in the initial state, the round hole of the stirring plate (112) and the round hole of the expansion plate (1121) are staggered with each other, and after the expansion plate (1121) moves, the round hole of the stirring plate (112) and the round hole of the expansion plate (1121) are aligned with each other; One end of the stirring shaft (111) is provided with a sliding hole, and the connecting rod (118) is slidingly connected in the sliding hole.

2. The integrated material proportioning, mixing and conveying system based on weight recognition according to claim 1, characterized in that: The B material system comprises a premixing tank (21), an electric valve (22), a working tank (23), a conveying pump three (24), a pneumatic valve five (25) and a loop pipe (26); The premixing tank (21) is connected with the working tank (23) by the electric valve (22), the working tank (23) is provided with a meter, the meter is electrically connected with the electric valve (22), the working tank (23) is connected with the pneumatic valve five (25) by the conveying pump three (24), the pneumatic valve five (25) is connected with the upper side of the working tank (23) by the loop pipe (26), the pneumatic valve five (25) is connected with the mixer (1) by the pipeline, and the inside of the A1 tank (15), the A2 tank (16), the premixing tank (21) and the working tank (23) is provided with a stirrer.

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