A polycarboxylic acid cement additive mixing device
By designing the drive and power components, the problems of cleaning residual materials on the inner wall of the polycarboxylate cement additive mixing equipment and poor material discharge were solved, achieving efficient mixing and flexible discharge of the equipment, thereby improving production efficiency and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG YUXINRUI TECH DEV CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-06-12
AI Technical Summary
Existing polycarboxylate cement additive mixing equipment has difficulty cleaning residual materials on the inner wall after the mixing process, resulting in poor material discharge and an inability to adjust the height of the discharge pipe to accommodate collection buckets of different heights.
A mixing device comprising a drive component and a power component was designed. The drive component realizes the rotation of the mixing roller and the cleaning of the L-shaped scraper through a connecting plate and a gear system, while the power component adjusts the height of the discharge pipe through a moving rod and a gear system.
It achieves thorough mixing of the mixture and complete cleaning of the material on the inner wall, ensuring clean discharge, and can adapt to collection buckets of different heights, thereby improving production efficiency and reducing costs.
Smart Images

Figure CN224348065U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of polycarboxylate cement additive mixing technology, and particularly relates to a polycarboxylate cement additive mixing equipment. Background Technology
[0002] In the production of building materials, polycarboxylate cement additives, as an important concrete admixture, can significantly improve the performance of concrete, and their mixing quality directly affects the final performance of the concrete. Therefore, the performance of polycarboxylate cement additive mixing equipment is crucial.
[0003] Commercially available polycarboxylate cement additive mixing equipment suffers from numerous problems in practical use. Firstly, after the mixing process, a large amount of material often remains on the inner wall of the mixing drum. Existing equipment lacks an effective scraping device, making it difficult to thoroughly clean the residue. This not only wastes material but may also affect the quality of the next batch of mixtures. Furthermore, during the discharge stage, material adhesion causes some material to remain in the drum, reducing production efficiency and increasing production costs. Moreover, the discharge pipe on existing mixing equipment cannot be adjusted in height, making it difficult for material to smoothly discharge into collection drums of varying heights. Therefore, we propose a polycarboxylate cement additive mixing equipment. Utility Model Content
[0004] The purpose of this invention is to provide a polycarboxylate cement additive mixing device to solve the problems mentioned in the background art.
[0005] In view of this, the present invention provides a polycarboxylate cement additive mixing device, comprising:
[0006] A base, on the top of which a support column is fixedly installed, a groove is provided in the support column, a movable rod is slidably installed in the groove, and a mixing tank is fixedly installed on the top of the movable rod;
[0007] A conical platform is fixedly installed at the bottom of the inner cavity of the mixing tank. A fixing rod is fixedly installed at the top of the conical platform. A third gear is fixedly installed at the top of the fixing rod. A connecting plate is rotatably installed inside the mixing tank and at the top of the third gear. A second gear rotates at the bottom of the connecting plate and on one side of the third gear. A stirring roller is fixedly installed at the bottom of the second gear. An L-shaped scraper is fixedly installed at the bottom of the connecting plate. A discharge pipe is fixedly installed at the bottom of the mixing tank.
[0008] A drive assembly, located on the mixing tank, is used to drive the connecting plate to rotate;
[0009] A power assembly, located on the base, is used to drive the moving rod to move up and down.
[0010] In this technical solution, during use, the operator puts the material into the inner cavity of the mixing drum through the feed hopper. Then, the drive component drives the connecting plate to rotate, which in turn drives the second gear and the L-shaped scraper to rotate. Under the meshing action, the second gear rotates, and the third gear causes the second gear to rotate on its own axis, thereby causing the stirring roller to rotate. The stirring roller will fully stir the material in the mixing drum, and the L-shaped scraper will scrape the material on the inner wall of the mixing drum and the top of the conical platform to prevent adhesion.
[0011] After mixing is complete, staff can adjust the distance between the discharge pipe and the ground according to the height of the collection bucket. The power unit drives the moving rod to move upward, which in turn moves the mixing bucket upward, and the mixing bucket moves the discharge pipe upward. This allows for adjustment of the distance between the discharge pipe and the ground, facilitating the discharge of materials from collection buckets of different heights.
[0012] In the above technical solution, the driving component further includes:
[0013] Two first gears are rotatably mounted on the top of the mixing tank. One end of one of the first gears passes through the top of the mixing tank and is coaxially connected to a connecting plate. An L-shaped plate is fixedly mounted on the top of the mixing tank and on one side of the other first gear. A second motor is fixedly mounted on the top of the L-shaped plate. The output end of the second motor passes through the L-shaped plate and is coaxially connected to the other first gear.
[0014] In this technical solution, when the second motor is powered on and started, the output shaft of the second motor will drive another first gear to rotate, and the other first gear will drive one of the first gears to rotate. At this time, one of the first gears will drive the connecting plate to rotate.
[0015] In the above technical solution, the output shaft of the second motor is rotatably connected to the L-shaped plate, and the two first gears mesh.
[0016] In this technical solution, the output shaft of the second motor is ensured to rotate within the L-shaped plate. Under the action of meshing, the rotation of one of the first gears will drive the rotation of the other first gear.
[0017] In the above technical solution, the power component further includes:
[0018] Three cylinders are fixedly installed on the top of the base. A sliding rod fixed to the bottom of the mixing tank is slidably installed inside each cylinder. A power chamber is opened inside the support column and below the slide groove. A first bevel gear is rotatably installed in the power chamber. A second bevel gear is rotatably installed inside the power chamber and on one side of the first bevel gear. A first motor is fixedly installed on one side of the support column. The output end of the first motor passes through one side of the support column and is coaxially connected to the second bevel gear. A threaded rod is rotatably installed in the slide groove. One end of the threaded rod extends into the moving rod and passes through the bottom of the slide groove and is coaxially connected to the first bevel gear.
[0019] In this technical solution, the first motor is powered on and started. The output shaft of the first motor will drive the second bevel gear to rotate. Under the action of meshing, the second bevel gear will drive the first bevel gear to rotate. The first bevel gear will drive the threaded rod to rotate. Under the action of the thread, the threaded rod will drive the moving rod to move upward in the slide groove. The moving rod will drive the mixing barrel to move upward. At this time, the three sliding rods at the bottom of the mixing barrel will move upward in the three cylinders respectively, ensuring the stability of the upward movement of the mixing barrel.
[0020] In the above technical solution, the first bevel gear meshes with the second bevel gear, the moving rod is threadedly connected to the threaded rod, the output shaft of the first motor is rotatably connected to the support column, and the L-shaped scraper contacts the inner wall of the mixing tank and the top of the conical platform.
[0021] In this technical solution, under the action of meshing, the rotation of the second bevel gear will drive the rotation of the first bevel gear. Under the action of the thread, the rotation of the threaded rod will drive the displacement of the moving rod, ensuring that the output shaft of the first motor can rotate normally, and ensuring that the L-shaped scraper can scrape the material on the inner wall of the mixing tank and the top of the conical platform to avoid adhesion.
[0022] In the above technical solution, the discharge pipe is further connected to the inner cavity of the mixing tank.
[0023] In this technical solution, it is ensured that the material in the mixing tank can enter the discharge pipe.
[0024] In the above technical solution, a solenoid valve is fixedly installed on the discharge pipe, and the second gear meshes with the third gear.
[0025] In this technical solution, the solenoid valve is controlled and opened, and the material in the mixing tank will be discharged to the outside through the discharge pipe. Under the action of meshing, when the second gear rotates, the third gear will cause the second gear to rotate on its own axis.
[0026] The beneficial effects of this utility model are:
[0027] 1. In operation, this polycarboxylate cement additive mixing equipment uses a drive assembly to rotate a connecting plate. The connecting plate, in turn, drives a second gear and an L-shaped scraper to rotate. During this meshing process, the second gear rotates due to the rotation of the third gear, which in turn causes the mixing roller to rotate. The mixing roller thoroughly mixes the material in the mixing drum. The L-shaped scraper scrapes away material from the inner wall of the mixing drum and the top of the conical platform, preventing adhesion. This allows the material to be scraped off the inner wall of the mixing drum and the top of the conical platform during discharge, preventing adhesion. Under the action of the conical platform, the material enters the discharge pipe under gravity, resulting in cleaner discharge.
[0028] 2. After the polycarboxylate cement additive mixing equipment is completed, the operator can adjust the distance between the discharge pipe and the ground according to the height of the collection bucket. Through the set power component, the power component drives the moving rod to move upward, which in turn drives the mixing bucket to move upward, and the mixing bucket drives the discharge pipe to move upward, thereby adjusting the distance between the discharge pipe and the ground, which is convenient for discharging materials from collection buckets of different heights. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0030] Figure 2 This is one of the structural diagrams of the interior of the mixing tank in this utility model;
[0031] Figure 3 This is the second schematic diagram of the internal structure of the mixing tank in this utility model;
[0032] Figure 4 This is a schematic diagram of the internal structure of the support column in this utility model;
[0033] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle.
[0034] The markings in the diagram are as follows:
[0035] 1. Base; 2. Support column; 3. Cylinder; 4. First motor; 5. Discharge pipe; 6. Mixing tank; 7. L-shaped plate; 8. Feed hopper; 9. Second motor; 10. First gear; 11. Second gear; 12. Third gear; 13. L-shaped scraper; 14. Agitator roller; 15. Fixed rod; 16. Conical platform; 17. Sliding rod; 18. Slide groove; 19. Threaded rod; 20. First bevel gear; 21. Moving rod; 22. Second bevel gear; 23. Connecting plate; 24. Power chamber. Detailed Implementation
[0036] 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.
[0037] 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.
[0038] 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.
[0039] 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.
[0040] 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.
[0041] Example 1:
[0042] Please see Figure 1 - Figure 5 As shown, this embodiment provides a polycarboxylate cement additive mixing device, including:
[0043] A base 1 has a support column 2 fixedly installed on its top. A sliding groove 18 is provided inside the support column 2. A movable rod 21 is slidably installed inside the sliding groove 18. A mixing tank 6 is fixedly installed on the top of the movable rod 21.
[0044] A conical platform 16 is fixedly installed at the bottom of the inner cavity of the mixing tank 6. A fixing rod 15 is fixedly installed at the top of the conical platform 16. A third gear 12 is fixedly installed at the top of the fixing rod 15. A connecting plate 23 is rotatably installed inside the mixing tank 6 and at the top of the third gear 12. A second gear 11 rotates at the bottom of the connecting plate 23 and on one side of the third gear 12. A stirring roller 14 is fixedly installed at the bottom of the second gear 11. An L-shaped scraper 13 is fixedly installed at the bottom of the connecting plate 23. A discharge pipe 5 is fixedly installed at the bottom of the mixing tank 6.
[0045] A drive assembly is located on the mixing tank 6 and is used to drive the connecting plate 23 to rotate;
[0046] The power unit is located on the base 1 and is used to drive the moving rod 21 to move up and down.
[0047] In operation, the staff puts the material into the inner cavity of the mixing tank 6 through the feed hopper 8. Then, the drive component drives the connecting plate 23 to rotate. The connecting plate 23 will drive the second gear 11 and the L-shaped scraper 13 to rotate. Under the meshing action, the second gear 11 will rotate during the rotation of the third gear 12, thereby causing the stirring roller 14 to rotate. The stirring roller 14 will fully stir the material in the mixing tank 6. In addition, the L-shaped scraper 13 will scrape the material on the inner wall of the mixing tank 6 and the top of the conical platform 16 to prevent sticking.
[0048] After mixing, the staff can adjust the distance between the discharge pipe 5 and the ground according to the height of the collection bucket. The power component can drive the moving rod 21 to move upward, which will drive the mixing bucket 6 to move upward, and the mixing bucket 6 will drive the discharge pipe 5 to move upward, thereby adjusting the distance between the discharge pipe 5 and the ground, which is convenient for discharging materials from collection buckets of different heights.
[0049] Example 2:
[0050] This embodiment provides a polycarboxylate cement additive mixing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including a driving component:
[0051] Two first gears 10 are rotatably mounted on the top of the mixing tank 6. One end of one of the first gears 10 passes through the top of the mixing tank 6 and is coaxially connected to the connecting plate 23. An L-shaped plate 7 is fixedly mounted on the top of the mixing tank 6 and on one side of the other first gear 10. A second motor 9 is fixedly mounted on the top of the L-shaped plate 7. The output end of the second motor 9 passes through the L-shaped plate 7 and is coaxially connected to the other first gear 10.
[0052] When the second motor 9 is powered on and started, the output shaft of the second motor 9 will drive another first gear 10 to rotate, and the other first gear 10 will drive one of the first gears 10 to rotate. At this time, one of the first gears 10 will drive the connecting plate 23 to rotate.
[0053] Example 3:
[0054] This embodiment provides a polycarboxylate cement additive mixing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the output shaft of the second motor 9 is rotatably connected to the L-shaped plate 7, and the two first gears 10 mesh.
[0055] Specifically, it is ensured that the output shaft of the second motor 9 can rotate within the L-shaped plate 7. Under the action of meshing, the rotation of one of the first gears 10 will drive the other first gear 10 to rotate.
[0056] Example 4:
[0057] This embodiment provides a polycarboxylate cement additive mixing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including a power component:
[0058] Three cylinders 3 are fixedly installed on the top of the base 1. A sliding rod 17, which is fixed to the bottom of the mixing tank 6, is slidably installed inside the cylinder 3. A power chamber 24 is opened inside the support column 2 and below the slide groove 18. A first bevel gear 20 is rotatably installed inside the power chamber 24. A second bevel gear 22 is rotatably installed inside the power chamber 24 and on one side of the first bevel gear 20. A first motor 4 is fixedly installed on one side of the support column 2. The output end of the first motor 4 passes through one side of the support column 2 and is coaxially connected to the second bevel gear 22. A threaded rod 19 is rotatably installed inside the slide groove 18. One end of the threaded rod 19 extends into the moving rod 21 and passes through the bottom of the slide groove 18 and is coaxially connected to the first bevel gear 20.
[0059] When the first motor 4 is powered on and started, the output shaft of the first motor 4 will drive the second bevel gear 22 to rotate. Under the action of meshing, the second bevel gear 22 will drive the first bevel gear 20 to rotate. The first bevel gear 20 will drive the threaded rod 19 to rotate. Under the action of the thread, the threaded rod 19 will drive the moving rod 21 to move upward in the slide groove 18. The moving rod 21 will drive the mixing barrel 6 to move upward. At this time, the three sliding rods 17 at the bottom of the mixing barrel 6 will move upward in the three cylinders 3 respectively, ensuring the stability of the upward movement of the mixing barrel 6.
[0060] Example 5:
[0061] This embodiment provides a polycarboxylate cement additive mixing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the first bevel gear 20 meshes with the second bevel gear 22, the moving rod 21 is threadedly connected to the threaded rod 19, the output shaft of the first motor 4 is rotatably connected to the support column 2, and the L-shaped scraper 13 contacts the inner wall of the mixing tank 6 and the top of the conical platform 16.
[0062] Under the action of meshing, the rotation of the second bevel gear 22 will drive the rotation of the first bevel gear 20. Under the action of the thread, the rotation of the threaded rod 19 will drive the displacement of the moving rod 21, ensuring that the output shaft of the first motor 4 can rotate normally, and ensuring that the L-shaped scraper 13 can scrape the material on the inner wall of the mixing tank 6 and the top of the conical platform 16 to avoid sticking.
[0063] Example 6:
[0064] This embodiment provides a polycarboxylate cement additive mixing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the discharge pipe 5 is connected to the inner cavity of the mixing tank 6.
[0065] This ensures that the material in the mixing tank 6 can enter the discharge pipe 5.
[0066] Example 7:
[0067] This embodiment provides a polycarboxylate cement additive mixing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: a solenoid valve is fixedly installed on the discharge pipe 5, and the second gear 11 meshes with the third gear 12.
[0068] In this process, the solenoid valve is controlled and opened, and the material in the mixing tank 6 will be discharged to the outside through the discharge pipe 5. Under the action of meshing, when the second gear 11 rotates, the third gear 12 will cause the second gear 11 to rotate on its own.
[0069] Working principle: During use, the operator puts the material into the inner cavity of the mixing tank 6 through the feed hopper 8. Then, the second motor 9 is powered on and started. The output shaft of the second motor 9 will drive another first gear 10 to rotate. The other first gear 10 will drive one of the first gears 10 to rotate. At this time, one of the first gears 10 will drive the connecting plate 23 to rotate. The connecting plate 23 will drive the second gear 11 and the L-shaped scraper 13 to rotate. Under the meshing action, the second gear 11 will rotate during the rotation of the third gear 12, thereby enabling the stirring roller 14 to rotate. The stirring roller 14 will fully stir the material in the mixing tank 6. In addition, the L-shaped scraper 13 will scrape the material on the inner wall of the mixing tank 6 and the top of the conical platform 16 to prevent adhesion.
[0070] After mixing, the staff can adjust the distance between the discharge pipe 5 and the ground according to the height of the collection bucket. The first motor 4 is powered on and started. The output shaft of the first motor 4 will drive the second bevel gear 22 to rotate. Under the action of meshing, the second bevel gear 22 will drive the first bevel gear 20 to rotate. The first bevel gear 20 will drive the threaded rod 19 to rotate. Under the action of the thread, the threaded rod 19 will drive the moving rod 21 to move upward in the slide groove 18. The moving rod 21 will drive the mixing bucket 6 to move upward. At this time, the three sliding rods 17 at the bottom of the mixing bucket 6 will move upward in the three cylinders 3 respectively to ensure the stability of the upward movement of the mixing bucket 6. The mixing bucket 6 will drive the discharge pipe 5 to move upward, thereby adjusting the distance between the discharge pipe 5 and the ground, which is convenient for discharging materials from collection buckets of different heights.
[0071] 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 polycarboxylate cement additive mixing device, characterized in that, include: A base (1) is provided, and a support column (2) is fixedly installed on the top of the base (1). A sliding groove (18) is provided in the support column (2). A moving rod (21) is slidably installed in the sliding groove (18). A mixing tank (6) is fixedly installed on the top of the moving rod (21). A conical platform (16) is fixedly installed at the bottom of the inner cavity of the mixing tank (6). A fixing rod (15) is fixedly installed at the top of the conical platform (16). A third gear (12) is fixedly installed at the top of the fixing rod (15). A connecting plate (23) is rotatably installed inside the mixing tank (6) and at the top of the third gear (12). A second gear (11) rotates at the bottom of the connecting plate (23) and on one side of the third gear (12). A stirring roller (14) is fixedly installed at the bottom of the second gear (11). An L-shaped scraper (13) is fixedly installed at the bottom of the connecting plate (23). A discharge pipe (5) is fixedly installed at the bottom of the mixing tank (6). A drive assembly located on the mixing tank (6) and used to drive the connecting plate (23) to rotate; A power assembly is located on the base (1) and is used to drive the moving rod (21) to move up and down.
2. The polycarboxylate cement additive mixing equipment according to claim 1, characterized in that, The driving component includes: Two first gears (10) are rotatably mounted on the top of the mixing tank (6). One end of one of the first gears (10) passes through the top of the mixing tank (6) and is coaxially connected to the connecting plate (23). An L-shaped plate (7) is fixedly mounted on the top of the mixing tank (6) and on one side of the other first gear (10). A second motor (9) is fixedly mounted on the top of the L-shaped plate (7). The output end of the second motor (9) passes through the L-shaped plate (7) and is coaxially connected to the other first gear (10).
3. The polycarboxylate cement additive mixing equipment according to claim 2, characterized in that, The output shaft of the second motor (9) is rotatably connected to the L-shaped plate (7), and the two first gears (10) mesh.
4. The polycarboxylate cement additive mixing equipment according to claim 1, characterized in that, The power assembly includes: Three cylinders (3) are fixedly installed on the top of the base (1). A sliding rod (17) fixed to the bottom of the mixing tank (6) is slidably installed in the cylinder (3). A power chamber (24) is opened in the support column (2) and below the slide groove (18). A first bevel gear (20) is rotatably installed in the power chamber (24). A second bevel gear (22) is rotatably installed in the power chamber (24) and on one side of the first bevel gear (20). A first motor (4) is fixedly installed on one side of the support column (2). The output end of the first motor (4) passes through one side of the support column (2) and is coaxially connected to the second bevel gear (22). A threaded rod (19) is rotatably installed in the slide groove (18). One end of the threaded rod (19) extends into the moving rod (21). One end of the threaded rod (19) passes through the bottom of the slide groove (18) and is coaxially connected to the first bevel gear (20).
5. A polycarboxylate cement additive mixing device according to claim 4, characterized in that, The first bevel gear (20) meshes with the second bevel gear (22), the moving rod (21) is threadedly connected to the threaded rod (19), the output shaft of the first motor (4) is rotatably connected to the support column (2), and the L-shaped scraper (13) contacts the inner wall of the mixing tank (6) and the top of the conical platform (16).
6. The polycarboxylate cement additive mixing equipment according to claim 1, characterized in that, The discharge pipe (5) is connected to the inner cavity of the mixing tank (6).
7. A polycarboxylate cement additive mixing device according to claim 1, characterized in that, A solenoid valve is fixedly installed on the discharge pipe (5), and the second gear (11) meshes with the third gear (12).