Reaction device for producing water-based paint

Abstract

The utility model relates to a reaction device for producing water-based paint, which comprises a reaction kettle, a stirring motor and a stirring mechanism, and is technically characterized in that a longitudinal through hole is formed in a top cover of the reaction kettle, a hollow lifting column is arranged at the longitudinal through hole, and a pH sensor is fixed at the lower end of the hollow lifting column; a support is arranged on the outer wall of the reaction kettle, a longitudinal push-pull cylinder and a horizontal push-pull cylinder are arranged on the top of the support, the upper end of a telescopic rod of the longitudinal push-pull cylinder is connected with the gland through a connecting plate, and a horizontal through hole corresponding to a telescopic rod of the horizontal push-pull cylinder is formed in the outer wall of the reaction kettle. A positioning sleeve is fixed to the end of a telescopic rod of the horizontal push-pull cylinder, the center line of the positioning sleeve is perpendicular to the horizontal plane, a liquid absorption cotton ring is fixed in the positioning sleeve, and the center line of the positioning sleeve and the center line of the pH sensor are located in the same vertical plane. According to the device, the detection precision of the pH value of the system in the coating production process is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of water-based coating production equipment, specifically to a reaction device for producing water-based coatings. Background Technology

[0002] Water-based coatings are coatings that use water as a solvent or dispersion medium. The raw materials for water-based coatings include water-soluble resins, water-dispersible pigments and fillers, co-solvents, and other additives. Water-based coatings primarily use water as a solvent, saving significant resources, are harmless to humans, do not pollute the environment, and possess characteristics such as water resistance, abrasion resistance, aging resistance, yellowing resistance, fast drying, and ease of use.

[0003] In the production process of water-based coatings, a stirring mechanism is typically used to thoroughly mix the raw materials. For example, CN221714301 U discloses a reaction apparatus for producing water-based coatings, which includes a base, a second support fixedly connected to the top of the base, a stirring tank fixedly connected to the top of the second support, a guide pipe fixedly connected to the bottom of the stirring tank, a buffer pipe fixedly connected to one end of the guide pipe, an output pipe fixedly connected to one side of the outer wall of the buffer pipe, a first support fixedly connected to both sides of the outer wall of the output pipe, the bottom of the first support fixedly connected to one side of the top of the base, a filter pipe slidably connected inside the buffer pipe, and a mounting column fixedly connected to the bottom of the filter pipe. This apparatus guides the water-based coating into the buffer pipe through the guide pipe, where it is filtered by the filter pipe inside the buffer pipe. A motor drives the stirring column to rotate, accelerating the filtration rate and solving the problem of impurities or solid precipitates that may be present after the water-based coating reaction, thus improving the production quality of the water-based coating.

[0004] To maintain the stability of the reaction system, a neutralizing agent is needed to adjust the pH value during the production of water-based coatings. A pH sensor is also required to monitor the pH value during this adjustment process. However, a problem exists: if the pH sensor is continuously inserted into the coating in the mixing tank, the detection head becomes contaminated with the coating before adjustment, significantly reducing the accuracy of the measurement of the adjusted coating. Utility Model Content

[0005] The purpose of this invention is to provide a reaction device for producing water-based coatings that has a reasonable structure and reliable operation, thereby improving the accuracy of pH value detection in the coating production process.

[0006] The technical solution of this utility model is:

[0007] A reaction apparatus for producing water-based coatings includes a reaction vessel, a stirring motor located on top of the reaction vessel, and a stirring mechanism located inside the reaction vessel and connected to the output end of the stirring motor. The key technical features are: the top cover of the reaction vessel has a longitudinal through-hole, a hollow lifting column is located at the longitudinal through-hole, a pH sensor is fixed to the lower end of the hollow lifting column, a pressure cap is located at the upper end of the hollow lifting column, and the signal line of the pH sensor is led out through the pressure cap; a bracket is provided on the outer wall of the reaction vessel, and a longitudinal push-pull cylinder and a horizontal push-pull cylinder are located at the top of the bracket; the upper end of the telescopic rod of the longitudinal push-pull cylinder is connected to the pressure cap via a connecting plate; a horizontal through-hole corresponding to the telescopic rod of the horizontal push-pull cylinder is provided on the outer wall of the reaction vessel; a positioning sleeve is fixed to the end of the telescopic rod of the horizontal push-pull cylinder; the centerline of the positioning sleeve is perpendicular to the horizontal plane, and an absorbent cotton ring is fixed inside the positioning sleeve; the centerline of the positioning sleeve and the centerline of the pH sensor are located in the same vertical plane.

[0008] The reaction apparatus for producing water-based coatings described above has a replacement port with a corresponding positioning sleeve on the edge of the top cover.

[0009] The aforementioned reaction apparatus for producing water-based coatings has multiple leakage holes on the side wall of the positioning sleeve.

[0010] In the aforementioned reaction apparatus for producing water-based coatings, the positioning sleeve is positioned higher than the working position of the pH sensor. The initial position of the positioning sleeve is below the replacement opening of the top cover, and the working position is on the center line of the hollow lifting column.

[0011] The beneficial effects of this utility model are:

[0012] When adjusting the pH of the coating reaction system in the reactor, a neutralizing agent is added intermittently and uniformly. After each addition, a hollow lifting column drives the detection end of the pH sensor to be inserted below the liquid surface in the reactor to detect the pH value of the reaction system. Alternatively, multiple pH values ​​can be measured intermittently during stirring.

[0013] After the previous test is completed, to ensure the accuracy of the next test, the pH sensor is moved upward to the highest point by the longitudinal push-pull cylinder. Then, the horizontal push-pull cylinder is activated to push the positioning sleeve to the bottom of the pH sensor. The pH sensor is then moved downward so that its detection end is inserted into the absorbent cotton ring inside the positioning sleeve. The coating on its surface is absorbed and wiped clean by the absorbent cotton ring. The pH sensor is then moved upward again, the positioning sleeve is reset, and the hollow lifting column moves the detection end of the pH sensor downward again and inserts it below the liquid surface of the reaction vessel for another pH value test.

[0014] This working method avoids the influence of residual paint solution from previous pH sensor readings on the structure of subsequent readings, thereby improving the accuracy of pH value detection in the paint production process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the working state of this utility model;

[0016] Figure 2 yes Figure 1 Enlarged view of section A in the middle;

[0017] Figure 3 Is following Figure 1 A schematic diagram of the structure after the testing process;

[0018] Figure 4 Is following Figure 2 A diagram showing the cleanup status afterward.

[0019] In the diagram: 1. Reactor, 2. Stirring motor, 3. Longitudinal push-pull cylinder, 4. Horizontal push-pull cylinder, 5. Support, 6. Stirring mechanism, 7. Pressure cap, 8. Connecting plate, 9. Replacement port, 10. Hollow lifting column, 11. Signal line, 12. pH sensor, 13. Liquid absorption cotton ring, 14. Positioning sleeve. Detailed Implementation

[0020] The present invention will be described in detail with reference to the accompanying drawings.

[0021] like Figures 1-4 As shown, the reaction apparatus for producing water-based coatings includes a reaction vessel 1, a stirring motor 2 located on top of the reaction vessel 1, and a stirring mechanism 6 located inside the reaction vessel 1 and connected to the output end of the stirring motor 2.

[0022] The reactor 1 has a longitudinal through hole on its top cover, and a hollow lifting column 10 is provided at the longitudinal through hole. A pH sensor 12 is fixed at the lower end of the hollow lifting column 10, and a pressure cap 7 is provided at the upper end of the hollow lifting column 10, through which the signal line 11 of the pH sensor 12 is led out.

[0023] The outer wall of the reactor 1 is provided with a support 5, and the top of the support 5 is provided with a longitudinal push-pull cylinder 3 and a horizontal push-pull cylinder 4. The upper end of the telescopic rod of the longitudinal push-pull cylinder 3 is connected to the pressure cap 7 by a connecting plate 8. The outer wall of the reactor 1 is provided with a horizontal through hole corresponding to the telescopic rod of the horizontal push-pull cylinder 4. The end of the telescopic rod of the horizontal push-pull cylinder 4 is fixed with a positioning sleeve 14. The center line of the positioning sleeve 14 is perpendicular to the horizontal plane, and a liquid-absorbing cotton ring 13 is fixed inside it. The center line of the positioning sleeve 14 and the center line of the pH sensor 12 are located in the same vertical plane.

[0024] In this embodiment, the top cover edge is provided with a replacement opening 9 corresponding to the positioning sleeve 14. The positioning sleeve 14 is positioned higher than the working position of the pH sensor 12. The initial position of the positioning sleeve 14 is below the replacement opening 9 of the top cover, and its working position is on the center line of the hollow lifting column 10. The side wall of the positioning sleeve 14 is provided with multiple leakage holes.

[0025] Working principle:

[0026] 1. See Figure 1 The hollow lifting column 10 moves downward under the push of the longitudinal push-pull cylinder 3, and the detection end of the pH sensor 12 is immersed below the liquid surface of the reactor.

[0027] 2. Neutralizing agent is intermittently and uniformly added to the reaction coating of reactor 1 to adjust the pH value of the reaction system.

[0028] 3. After each addition of neutralizing agent, the hollow lifting column 10 drives the detection end of the pH sensor 12 to be inserted below the liquid surface of the reactor 1. After the detection is completed, it moves upward to the highest point under the drive of the longitudinal push-pull cylinder 3. Then, the horizontal push-pull cylinder 4 is activated to push the positioning sleeve 14 to the bottom of the pH sensor 12. Then, the pH sensor 12 moves downward so that its detection end is inserted into the absorbent cotton ring 13 inside the positioning sleeve 14. The coating on its surface is absorbed and wiped clean by the absorbent cotton ring. The pH sensor 12 moves upward again, the positioning sleeve 14 is reset, and the hollow lifting column 10 drives the detection end of the pH sensor 12 to move downward again and insert it below the liquid surface of the reactor 1 for another pH value detection after neutralization.

[0029] 3. Replace the absorbent cotton ring 13 in the positioning sleeve 14 periodically through the replacement port 9.

[0030] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.

Claims

1. A reaction apparatus for producing water-based coatings, comprising a reaction vessel, a stirring motor disposed at the top of the reaction vessel, and a stirring mechanism disposed inside the reaction vessel and connected to the output end of the stirring motor, characterized in that: The top cover of the reactor has a longitudinal through hole, and a hollow lifting column is provided at the longitudinal through hole. A pH sensor is fixed at the lower end of the hollow lifting column, and a pressure cap is provided at the upper end of the hollow lifting column, through which the signal line of the pH sensor is led out. A bracket is provided on the outer wall of the reactor, and a longitudinal push-pull cylinder and a horizontal push-pull cylinder are provided at the top of the bracket. The upper end of the telescopic rod of the longitudinal push-pull cylinder is connected to the pressure cap by a connecting plate. A horizontal through hole corresponding to the telescopic rod of the horizontal push-pull cylinder is provided on the outer wall of the reactor. A positioning sleeve is fixed at the end of the telescopic rod of the horizontal push-pull cylinder. The center line of the positioning sleeve is perpendicular to the horizontal plane, and an absorbent cotton ring is fixed inside it. The center line of the positioning sleeve and the center line of the pH sensor are located in the same vertical plane.

2. The reaction apparatus for producing water-based coatings according to claim 1, characterized in that: The top cover edge is provided with a replacement opening for a corresponding positioning sleeve.

3. The reaction apparatus for producing water-based coatings according to claim 1, characterized in that: The positioning sleeve has multiple leakage holes on its side wall.

4. The reaction apparatus for producing water-based coatings according to claim 1, characterized in that: The positioning sleeve is positioned higher than the working position of the pH sensor. The initial position of the positioning sleeve is below the replacement opening of the top cover, and the working position is on the center line of the hollow lifting column.

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