A polycarboxylic acid water reducer pre-reactor

Abstract

The utility model belongs to polycarboxylate water reducing agent pre -reactor technical field, especially relates to a polycarboxylate water reducing agent pre -reactor, including pre -reactor, still include: material box, material box fixedly connected in the top surface, and the inner chamber of material box is linked together with the feed inlet of pre -reactor, the top surface fixedly connected with the feed pipe of material box, and the inner chamber of feed pipe is linked together with the inner chamber of material box, the through slot is set up on the inner wall of material box and is linked together with outside, and the frame is inserted in the through slot, and the inner wall of frame is fixedly connected with the screen cloth, fixed component, fixed component is located in the frame, and is used for fixing the frame, motor, motor fixedly connected in the top surface of material box, and the output shaft of motor penetrates the top surface of material box and extends to material box, and the output shaft of motor is fixedly connected with the broken roll, the utility model solves the problem of the reaction rate reduction, makes the time extension of whole pre -reaction stage, and the production cycle becomes long, reduces the production efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of polycarboxylate superplasticizer prereactor, and particularly relates to a polycarboxylate superplasticizer prereactor. Background Technology

[0002] The working principle of the polycarboxylate superplasticizer pre-reactor is based on chemical reaction kinetics and fluid mixing theory. In the pre-reaction stage, raw materials required for the synthesis of polycarboxylate superplasticizer, such as monomers (e.g., acrylic acid, methacrylic acid), initiators (e.g., ammonium persulfate, potassium persulfate), and chain transfer agents (e.g., mercaptoethanol, mercaptopropionic acid), are added to the pre-reactor in a specific ratio. A stirring device within the pre-reactor ensures thorough mixing of the raw materials, forming a homogeneous mixture. Simultaneously, the pre-reactor is typically equipped with heating or cooling devices to control the reaction temperature, ensuring that the raw materials undergo partial polymerization or reach a certain degree of reaction at a suitable temperature, providing appropriate reactivity and molecular weight distribution for subsequent polymerization reactions.

[0003] For example, Chinese patent CN220780356U discloses a novel pre-reactor for polycarboxylate superplasticizer testing, comprising a reaction chamber, a constant-temperature heating structure, a heat dissipation structure, and a stirring structure. The constant-temperature heating structure, heat dissipation structure, and stirring structure are all located inside the reaction chamber. The constant-temperature heating structure includes a central trough fixedly connected to the bottom of the reaction chamber, with an immersion-type constant-temperature heater fixedly connected inside the central trough. A heating ring is fixedly connected to the bottom of the inner wall of the reaction chamber, and a storage cavity is formed inside the heating ring. This invention uses a temperature controller and a temperature sensor to control the immersion-type constant-temperature heater to maintain a constant temperature for the polycarboxylate superplasticizer inside the reaction chamber. Compared to existing reactors without constant-temperature heating, this device has the advantage of being able to maintain a constant temperature for the polycarboxylate superplasticizer, effectively mitigating the effects of high temperatures on the polycarboxylate superplasticizer and ensuring the reaction effect.

[0004] The aforementioned patent has the following problems:

[0005] This patent has some drawbacks in its use, such as the possibility of clumping in polycarboxylate superplasticizer raw materials during prolonged storage. When users pour clumped polycarboxylate superplasticizer raw materials into the aforementioned pre-reactor for pre-reaction testing, the clumped raw materials reduce the effective contact area with other components in the reaction system, leading to a decrease in the reaction rate, a prolonged pre-reaction stage, a longer production cycle, and reduced production efficiency. Therefore, we propose a polycarboxylate superplasticizer pre-reactor. Utility Model Content

[0006] The purpose of this invention is to provide a pre-reactor for polycarboxylate superplasticizer to solve the problems mentioned in the background art.

[0007] In view of this, the present invention provides a pre-reactor for polycarboxylate superplasticizer, comprising a pre-reactor and further comprising:

[0008] A material box is fixedly connected to the top surface of the reactor, and the inner cavity of the material box is connected to the feed inlet of the pre-reactor. A feed pipe is fixedly connected to the top surface of the material box, and the inner cavity of the feed pipe is connected to the inner cavity of the material box.

[0009] A through channel is formed on the inner wall of the material box and is connected to the outside. A frame is inserted into the through channel, and a screen is fixedly connected to the inner wall of the frame.

[0010] A fixing component, located within the frame and used to fix the frame in place;

[0011] The motor is fixedly connected to the top surface of the material box, and the output shaft of the motor passes through the top surface of the material box and extends into the material box. A crushing roller is fixedly connected to the output shaft of the motor, and one end of the crushing roller extends into the inner cavity of the material box. A rotating sleeve is rotatably connected to the upper half of the crushing roller, and multiple push plates are fixedly connected to the circumference of the rotating sleeve.

[0012] A reciprocating assembly, located inside the material bin, is used to drive the rotating sleeve to reciprocate.

[0013] In the above technical solution, the fixing component further includes:

[0014] A sliding groove is formed within the frame and communicates with a through groove. A rod is slidably connected within the sliding groove, with one end of the rod extending to the inner wall of the through groove and engaging with it. A spring is fixedly connected to the rod and fixed to the inner wall of the sliding groove.

[0015] Based on the above structure, the material bin and feed pipe ensure that users can pour raw materials into the material bin through the feed pipe. Unagglomerated raw materials pass through the screen and the feed inlet on the pre-reactor into the pre-reactor. The motor and crushing rollers ensure that when the user starts the motor, the motor output shaft drives the crushing rollers to rotate within the material bin, crushing agglomerated raw materials. The reciprocating assembly, rotating sleeve, and push plates ensure that when the motor starts, it drives the rotating sleeve to rotate around the upper part of the crushing roller, causing the rotating sleeve to rotate and multiple push plates to reciprocate within the material bin, rapidly moving the raw materials and crushing agglomerated materials more quickly. The through-slot and frame ensure that the frame can be inserted into the through-slot, allowing users to pull it out for screen cleaning. The fixing assembly ensures that users can fix the frame in place within the through-slot, preventing it from detaching.

[0016] In this technical solution, it is ensured that the frame can be fixed in the through groove and cannot move.

[0017] In the above technical solution, the insertion rod is further shaped like an "L".

[0018] In this technical solution, it is ensured that the user can move one end of the plug rod by driving the other end of the plug rod.

[0019] In the above technical solution, the reciprocating component further includes:

[0020] The first gear slot is located inside the material box. Two incomplete gears are rotatably connected inside the first gear slot. A first gear is provided between the two incomplete gears and meshes with one of the incomplete gears. The first gear is located inside the first gear slot and is rotatably connected to the output shaft of the motor. One end of the first gear penetrates the inner wall of the first gear slot and extends into the material box and is fixed to the top of the rotating sleeve.

[0021] The second gear slot is located inside the material box and is connected to the first gear slot. A second gear and a third gear are rotatably connected in the second gear slot and mesh with each other. One end of the second gear extends into the first gear slot and is fixed to one of the incomplete gears. The third gear is fixedly connected to the output shaft of the motor.

[0022] The movable slot is located inside the material box and is connected to the first gear slot and the second gear slot. The movable slot is rotatably connected to the first sprocket and the second sprocket, and the second sprocket is fixedly connected to the output shaft of the motor. One end of the first sprocket extends into the first gear slot and is fixed to another incomplete gear. A chain meshes between the first sprocket and the second sprocket.

[0023] In this technical solution, it is ensured that when the first gear reciprocates, the first gear will drive the rotating sleeve to reciprocate around the upper half of the crushing roller.

[0024] In the above technical solution, one end of the first gear is rotatably connected to the material box.

[0025] In this technical solution, it is ensured that when the first gear rotates, one end of the first gear can rotate normally inside the material box.

[0026] In the above technical solution, one end of the second gear is rotatably connected to the first gear groove.

[0027] In this technical solution, it is ensured that when the second gear rotates, one end of the second gear can rotate normally within the first gear slot.

[0028] In the above technical solution, one end of the first sprocket is rotatably connected to the first gear groove.

[0029] In this technical solution, it is ensured that when the first sprocket rotates, one end of the first sprocket can rotate normally within the first gear groove.

[0030] In the above technical solution, the first gear further meshes with another incomplete gear.

[0031] In this technical solution, it is ensured that when another incomplete gear rotates to the appropriate position, it will mesh with the first gear.

[0032] The beneficial effects of this utility model are:

[0033] 1. This polycarboxylate superplasticizer pre-reactor, with its material bin and feed pipe, allows users to pour raw materials into the material bin. Unagglomerated raw materials pass through a screen and the feed inlet on the pre-reactor. A motor and crushing rollers ensure that when the motor is started, the output shaft drives the crushing rollers to rotate within the material bin, crushing agglomerated raw materials. A reciprocating assembly, rotating sleeve, and pushers ensure that when the motor starts, it drives the rotating sleeve to rotate around the upper part of the crushing rollers, causing the rotating sleeve to rotate and multiple pushers to reciprocate within the material bin. This rapid movement of the raw materials into the bin allows for faster crushing of agglomerated materials, solving the problems of reduced reaction rate, prolonged pre-reaction time, longer production cycles, and reduced production efficiency.

[0034] 2. This polycarboxylate superplasticizer prereactor, through the setting of a through groove and a frame, ensures that the frame can be inserted into the through groove, allowing the user to pull the frame out of the through groove for cleaning the screen. Through the setting of fixing components, it ensures that the user can fix the frame in the through groove and prevent it from moving, thus preventing the frame from detaching from the through groove. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0036] Figure 2 This is a cross-sectional structural schematic diagram of the material box of this utility model;

[0037] Figure 3 This is a schematic diagram of the internal structure of the material box of this utility model;

[0038] Figure 4 This is a utility model Figure 2 Enlarged structural diagram at point A;

[0039] Figure 5 This is a utility model Figure 3 Enlarged structural diagram at point B;

[0040] Figure 6 This is a schematic diagram of the internal structure of the frame of this utility model.

[0041] The markings in the diagram are as follows:

[0042] 1. Pre-reactor; 2. Material bin; 3. Feed pipe; 4. Through channel; 5. Frame; 6. Screen; 7. Motor; 8. Crushing roller; 9. Rotating sleeve; 10. Push plate; 11. Slide chute; 12. Insert rod; 13. Spring; 14. First gear slot; 15. Incomplete gear; 16. First gear; 17. Second gear slot; 18. Second gear; 19. Third gear; 20. Movable slot; 21. First sprocket; 22. Second sprocket; 23. Chain. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0044] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0045] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0046] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0047] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0048] Example 1:

[0049] Please see Figure 1 - Figure 6 As shown, this embodiment provides a polycarboxylate superplasticizer prereactor, including a prereactor 1, and further comprising:

[0050] Material box 2 is fixedly connected to the top surface of the pre-reactor 1, and the inner cavity of material box 2 is connected to the feed inlet of the pre-reactor 1. The top surface of material box 2 is fixedly connected to feed pipe 3, and the inner cavity of feed pipe 3 is connected to the inner cavity of material box 2.

[0051] The channel 4 is located on the inner wall of the material box 2 and is connected to the outside. A frame 5 is inserted into the channel 4, and a screen 6 is fixedly connected to the inner wall of the frame 5.

[0052] A fixing component is located within frame 5 and is used to fix frame 5 in place;

[0053] Motor 7 is fixedly connected to the top surface of material box 2, and the output shaft of motor 7 passes through the top surface of material box 2 and extends into the material box 2. Crushing roller 8 is fixedly connected to the output shaft of motor 7, and one end of crushing roller 8 extends into the inner cavity of material box 2. Rotating sleeve 9 is rotatably connected to the upper half of crushing roller 8, and multiple push plates 10 are fixedly connected to the circumference of rotating sleeve 9.

[0054] The reciprocating assembly is located inside the material box 2 and is used to drive the rotating sleeve 9 to reciprocate.

[0055] Example 2:

[0056] This embodiment provides a polycarboxylate superplasticizer prereactor, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including a fixed component:

[0057] The slide 11 is formed inside the frame 5 and is connected to the through groove 4. A rod 12 is slidably connected inside the slide 11, and one end of the rod 12 extends to the inner wall of the through groove 4 and is inserted into the through groove 4. A spring 13 is fixedly connected to the rod 12 and fixed to the inner wall of the slide 11.

[0058] When the user needs to clean the screen 6, the user pulls the insert rod 12 by hand, so that one end of the insert rod 12 enters the slide groove 11 from the inner wall of the through groove 4 and compresses the spring 13. At this time, the frame 5 is released. Then the user pulls the frame 5 out of the through groove 4 by hand to clean the screen 6. After cleaning, the user inserts the frame 5 into the through groove 4 by hand and releases the hand that pulls the insert rod 12, so that one end of the insert rod 12 is subjected to the rebound force of the spring 13 and inserts into the inner wall of the through groove 4, ensuring that the frame 5 can be fixed in the through groove 4 and cannot move.

[0059] Example 3:

[0060] This embodiment provides a polycarboxylate superplasticizer prereactor, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the insertion rod 12 is L-shaped.

[0061] This ensures that the user can move one end of the plug rod 12 by driving it through the other end of the plug rod 12.

[0062] Example 4:

[0063] This embodiment provides a polycarboxylate superplasticizer prereactor, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including a reciprocating component:

[0064] The first gear groove 14 is opened inside the material box 2. Two incomplete gears 15 are rotatably connected inside the first gear groove 14. A first gear 16 is arranged between the two incomplete gears 15 and meshes with one of the incomplete gears 15. The first gear 16 is located inside the first gear groove 14 and is rotatably connected to the output shaft of the motor 7. One end of the first gear 16 penetrates the inner wall of the first gear groove 14 and extends into the material box 2 and is fixed to the top of the rotating sleeve 9.

[0065] The second gear slot 17 is opened in the material box 2 and is connected to the first gear slot 14. The second gear 18 and the third gear 19 are rotatably connected in the second gear slot 17 and mesh with each other. One end of the second gear 18 extends into the first gear slot 14 and is fixed to one of the incomplete gears 15. The third gear 19 is fixedly connected to the output shaft of the motor 7.

[0066] The movable slot 20 is opened inside the material box 2 and is connected to the first gear slot 14 and the second gear slot 17. The first sprocket 21 and the second sprocket 22 are rotatably connected inside the movable slot 20, and the second sprocket 22 is fixedly connected to the output shaft of the motor 7. One end of the first sprocket 21 extends into the first gear slot 14 and is fixed to another incomplete gear 15. A chain 23 meshes between the first sprocket 21 and the second sprocket 22.

[0067] When motor 7 starts, its output shaft drives the second sprocket 22 to rotate within the movable groove 20. This causes the second sprocket 22 to drive the first sprocket 21 to rotate within the movable groove 20 via chain 23. Simultaneously, the output shaft of motor 7 drives the third gear 19 to rotate within the second gear groove 17, causing the third gear 19 to drive the second gear 18 to rotate in the opposite direction within the second gear groove 17. When the first sprocket 21 and the second gear 18 rotate in opposite directions, they respectively drive the two incomplete gears 15 to rotate in opposite directions within the first gear groove 14. When one of the incomplete gears 15 rotates, it drives the first gear 16 to rotate within the first gear groove 14. When one of the incomplete gears 15 rotates to the appropriate position, it disengages from the first gear 16. At the same time, the other incomplete gear 15 engages with the first gear 16 and drives the first gear 16 to rotate in the opposite direction, allowing the first gear 16 to reciprocate within the first gear groove 14. This ensures that when the first gear 16 reciprocates, it drives the rotating sleeve 9 to reciprocate around the upper half of the crushing roller 8.

[0068] Example 5:

[0069] This embodiment provides a polycarboxylate superplasticizer prereactor, which, in addition to the technical solutions of the above embodiments, also has the following technical features: one end of the first gear 16 is rotatably connected to the material box 2.

[0070] Specifically, it is ensured that when the first gear 16 rotates, one end of the first gear 16 can rotate normally inside the material box 2.

[0071] Example 6:

[0072] This embodiment provides a polycarboxylate superplasticizer prereactor, which, in addition to the technical solutions of the above embodiments, also has the following technical features: one end of the second gear 18 is rotatably connected to the first gear groove 14.

[0073] Specifically, it is ensured that when the second gear 18 rotates, one end of the second gear 18 can rotate normally within the first gear groove 14.

[0074] Example 7:

[0075] This embodiment provides a polycarboxylate superplasticizer prereactor, which, in addition to the technical solutions of the above embodiments, also has the following technical features: one end of the first sprocket 21 is rotatably connected to the first gear groove 14.

[0076] Specifically, it is ensured that when the first sprocket 21 rotates, one end of the first sprocket 21 can rotate normally within the first gear groove 14.

[0077] Example 8:

[0078] This embodiment provides a polycarboxylate superplasticizer prereactor, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the first gear 16 meshes with another incomplete gear 15.

[0079] Specifically, it is ensured that when the other incomplete gear 15 rotates to the appropriate position, it will mesh with the first gear 16.

[0080] In operation, the user pours the raw materials into the inner cavity of the material box 2 through the feed pipe 3. Unagglomerated raw materials pass through the screen 6 into the inner cavity of the pre-reactor 1. The user then starts the motor 7, causing its output shaft to drive the crushing roller 8 to rotate within the material box 2, thus crushing the agglomerated raw materials. When the motor 7 starts, its output shaft also drives the second sprocket 22 to rotate within the movable groove 20, causing the second sprocket 22 to drive the first sprocket 21 to rotate within the movable groove 20 via the chain 23. Simultaneously, the output shaft of the motor 7 also drives the third gear 19 to rotate within the second gear groove 17, causing the third gear 19 to drive the second gear 18 to rotate in the opposite direction within the second gear groove 17. When the first sprocket 21 and the second gear 18 rotate in opposite directions, they respectively drive the two incomplete gears 15 in the... The gears rotate in opposite directions within the gear slot 14. When one of the incomplete gears 15 rotates, it drives the first gear 16 to rotate within the gear slot 14. When one of the incomplete gears 15 rotates to the appropriate position, it disengages from the first gear 16. At the same time, the other incomplete gear 15 engages with the first gear 16 and drives it to rotate in the opposite direction, ensuring that the first gear 16 can reciprocate within the gear slot 14. When the first gear 16 reciprocates, it drives the rotating sleeve 9 to reciprocate around the upper half of the crushing roller 8. This causes the rotating sleeve 9 to drive multiple push plates 10 to reciprocate within the inner cavity of the material box 2, allowing the multiple push plates 10 to push the agglomerated raw material to move quickly within the inner cavity of the material box 2, facilitating the crushing roller 8 to quickly crush the agglomerated raw material.

[0081] When the user needs to clean the screen 6, the user pulls the insert rod 12 by hand, so that one end of the insert rod 12 enters the slide groove 11 from the inner wall of the through groove 4 and compresses the spring 13. At this time, the frame 5 is released. Then the user pulls the frame 5 out of the through groove 4 by hand to clean the screen 6. After cleaning, the user inserts the frame 5 into the through groove 4 by hand and releases the hand that pulls the insert rod 12, so that one end of the insert rod 12 is subjected to the rebound force of the spring 13 and inserts into the inner wall of the through groove 4, ensuring that the frame 5 can be fixed in the through groove 4 and cannot move.

[0082] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A prereactor for polycarboxylate superplasticizer, comprising a prereactor (1), characterized in that, Also includes: Material box (2), the material box (2) is fixedly connected to the top surface of the pre-reactor (1), and the inner cavity of the material box (2) is connected to the feed inlet of the pre-reactor (1). The top surface of the material box (2) is fixedly connected to the feed pipe (3), and the inner cavity of the feed pipe (3) is connected to the inner cavity of the material box (2). A through groove (4) is formed on the inner wall of the material box (2) and connected to the outside. A frame (5) is inserted into the through groove (4), and a screen (6) is fixedly connected to the inner wall of the frame (5). A fixing component, which is located within the frame (5) and is used to fix the frame (5); The motor (7) is fixedly connected to the top surface of the material box (2), and the output shaft of the motor (7) passes through the top surface of the material box (2) and extends into the material box (2). A crushing roller (8) is fixedly connected to the output shaft of the motor (7), and one end of the crushing roller (8) extends into the inner cavity of the material box (2). A rotating sleeve (9) is rotatably connected to the upper half of the crushing roller (8), and multiple push plates (10) are fixedly connected to the circumference of the rotating sleeve (9). A reciprocating assembly is located inside the material box (2) and is used to drive the rotating sleeve (9) to reciprocate.

2. The polycarboxylate superplasticizer prereactor according to claim 1, characterized in that, The fixing component includes: A sliding groove (11) is formed inside the frame (5) and connected to the through groove (4). A rod (12) is slidably connected inside the sliding groove (11), and one end of the rod (12) extends to the inner wall of the through groove (4) and is inserted into the through groove (4). A spring (13) is fixedly connected to the rod (12) and fixed to the inner wall of the sliding groove (11).

3. The polycarboxylate superplasticizer prereactor according to claim 2, characterized in that, The insertion rod (12) is L-shaped.

4. The polycarboxylate superplasticizer prereactor according to claim 1, characterized in that, The reciprocating component includes: The first gear groove (14) is opened in the material box (2). Two incomplete gears (15) are rotatably connected in the first gear groove (14). A first gear (16) is provided between the two incomplete gears (15), and the first gear (16) meshes with one of the incomplete gears (15). The first gear (16) is located in the first gear groove (14) and is rotatably connected to the output shaft of the motor (7). One end of the first gear (16) penetrates the inner wall of the first gear groove (14) and extends into the material box (2) and is fixed to the top of the rotating sleeve (9). The second gear slot (17) is opened in the material box (2) and is connected to the first gear slot (14). The second gear slot (17) is rotatably connected to the second gear (18) and the third gear (19), and the second gear (18) and the third gear (19) mesh with each other. One end of the second gear (18) extends into the first gear slot (14) and is fixed to one of the incomplete gears (15). The third gear (19) is fixedly connected to the output shaft of the motor (7). The movable slot (20) is opened in the material box (2) and communicates with the first gear slot (14) and the second gear slot (17). The movable slot (20) is rotatably connected to the first sprocket (21) and the second sprocket (22), and the second sprocket (22) is fixedly connected to the output shaft of the motor (7). One end of the first sprocket (21) extends into the first gear slot (14) and is fixed to another incomplete gear (15). A chain (23) meshes between the first sprocket (21) and the second sprocket (22).

5. A pre-reactor for polycarboxylate superplasticizer according to claim 4, characterized in that, One end of the first gear (16) is rotatably connected to the material box (2).

6. A pre-reactor for polycarboxylate superplasticizer according to claim 4, characterized in that, One end of the second gear (18) is rotatably connected to the first gear groove (14).

7. A pre-reactor for polycarboxylate superplasticizer according to claim 4, characterized in that, One end of the first sprocket (21) is rotatably connected to the first gear groove (14).

8. A pre-reactor for polycarboxylate superplasticizer according to claim 4, characterized in that, The first gear (16) meshes with another incomplete gear (15).

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