High polymer resin modified preparation normal temperature solvent type marking paint base dissolving reactor

Abstract

This utility model relates to a base material dissolution reactor for preparing room-temperature solvent-based road marking paint using modified polymer resins. This utility model effectively solves the problems of existing base material dissolution equipment, such as inconvenience in fully and effectively mixing and stirring the base material, hindering rapid dissolution, and resulting in significant solvent evaporation loss. This polymer resin-modified base material dissolution reactor for preparing room-temperature solvent-based road marking paint can thoroughly crush resin lumps accumulated at the bottom of the reactor, preventing crusting and shortening the dissolution time. It can also generate a downward axial flow of the upper layer of raw materials within the reactor, promoting thorough mixing. The temperature control mechanism allows the lower, middle, and upper zones to operate at high, medium, and low temperatures respectively, thus enabling rapid dissolution of the raw materials in the lower zone, maintaining reaction equilibrium in the middle zone, and suppressing solvent evaporation in the upper zone, forming independent temperature control. The solvent reflux mechanism can recover and condense solvent vapor, reducing solvent evaporation loss and making it more convenient to use in the preparation of road marking paint.

Description

Technical Field

[0001] This utility model belongs to the field of road marking paint processing technology, specifically relating to a base dissolution reaction vessel for preparing room temperature solvent-based road marking paint by modifying polymer resin. Background Technology

[0002] In fields such as road marking paint and industrial anti-corrosion coatings, room-temperature solvent-based road marking paints are widely used due to their convenient application and low cost. Their core base material requires the complete dissolution of polymeric resins (such as C5 petroleum resin, rosin-modified resin, and acrylic resin) in an organic solvent. This process places stringent requirements on dissolution efficiency, solution uniformity, temperature control, and solvent loss. Resin particles must be thoroughly broken down and dispersed to avoid undissolved "fish eyes" affecting paint adhesion and reflectivity. Resin is prone to degradation and coking at temperatures above 80℃, while the dissolution rate drops sharply below 40℃. The volatilization of VOC components such as xylene and 200# solvent oil leads to increased costs and environmental pollution.

[0003] Existing base material dissolving equipment is limited by the inherent defects of single-axis stirring, which makes it difficult to fully and effectively mix the base material. It also suffers from low temperature control efficiency and severe heat transfer lag, which prolongs the reaction cycle and hinders the rapid dissolution reaction of the base material. Furthermore, existing reaction vessels are not convenient for collecting and refluxing the solvent vapors generated after heating, which can easily lead to raw material waste and increase the loss rate of small molecule solvents through volatilization. This makes it unsuitable for use in the preparation of road marking paint. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a base material dissolution reactor for preparing room temperature solvent-based road marking paint by modifying polymer resin. This base material dissolution reactor for preparing room temperature solvent-based road marking paint by modifying polymer resin can fully crush the resin blocks accumulated at the bottom of the reactor body, prevent the bottom from forming, shorten the dissolution time, and the solvent reflux mechanism can recover and condense the solvent vapor generated by heating, and re-condense it into liquid and discharge it into the reactor body, effectively reducing raw material waste and reducing solvent evaporation loss rate.

[0005] A reaction vessel for dissolving the base material of modified polymer resin for preparing room-temperature solvent-based road marking paint includes a vessel body and a vessel lid. The vessel body is equipped with a temperature control mechanism that can independently control the temperature of different height parts of the vessel body. The bottom of the vessel body is equipped with a crushing mechanism that can crush and stir the raw materials. The vessel lid is fixedly installed on the top of the vessel body, and a stirring mechanism that can stir the raw materials in the vessel body is set at its center. The stirring mechanism and the crushing mechanism are vertically corresponding and both are set inside the vessel body. The upper surface of the vessel lid is equipped with a solvent reflux mechanism that can condense and reflux the solvent vapor in the vessel body.

[0006] Preferably, a discharge pipe is fixedly connected to one side of the bottom of the vessel body, and a solenoid valve for controlling its flow is fixedly installed on the side of the discharge pipe. A feed pipe that can communicate with the inside of the vessel body is fixedly connected to the upper surface of the vessel lid.

[0007] Preferably, the temperature control mechanism includes an upper jacket, a middle jacket, a lower jacket, and a spiral guide plate. The upper jacket, middle jacket, and lower jacket are respectively fixedly installed on the top, middle, and bottom of the outer side of the vessel. The interior of the upper jacket, middle jacket, and lower jacket is fixedly connected with a spiral guide plate that can improve heat transfer efficiency. The top and bottom of the sides of the upper jacket, middle jacket, and lower jacket are provided with water inlets and outlets, and the three sets of water inlets and outlets are respectively connected to different external heat source pipes.

[0008] Preferably, the crushing mechanism includes a first motor and a crushing cutter. The first motor is fixedly installed at the center of the lower surface of the vessel and its output end is connected to the crushing cutter via a spline. The crushing cutter is disposed on the inner bottom wall of the vessel and its rotation diameter is slightly smaller than the inner diameter of the vessel.

[0009] Preferably, the stirring mechanism includes a second motor, a spiral conveyor shaft, and a stirring shaft. The second motor is fixedly installed at the center of the upper surface of the vessel lid, and its output end passes through the inside of the vessel lid and is connected to the spiral conveyor shaft via a spline. The stirring shaft is fixedly connected to the bottom end of the spiral conveyor shaft, and the stirring shaft and the spiral conveyor shaft can rotate inside the vessel.

[0010] Preferably, the solvent reflux mechanism includes a heat exchanger, a vacuum pump, an annular inlet pipe, and an annular outlet pipe. The heat exchanger is fixedly installed on the upper surface of the vessel lid, and its inlet end is connected to the outlet end of the vacuum pump. The vacuum pump is fixedly installed on the upper surface of the vessel lid, and its inlet end is connected to the annular inlet pipe. The annular outlet pipe is connected to the outlet end of the heat exchanger, and both the annular inlet pipe and the annular outlet pipe are fixedly installed on the inner top wall of the vessel lid. The lower surface of the annular inlet pipe is fixedly connected to a plurality of suction pipe heads that communicate with it and are arranged in an annular array. The lower surface of the annular outlet pipe is fixedly connected to a plurality of outlet heads that communicate with it and are arranged in an annular array.

[0011] The beneficial effects of the above technical solution are as follows:

[0012] The polymer resin modified for preparing room-temperature solvent-based road marking paint base dissolution reactor, through the design of a temperature control mechanism, a crushing mechanism, a stirring mechanism, and a solvent reflux mechanism, allows the crushing and stirring mechanisms to rotate at different speeds. This ensures that the bottom crushing mechanism can thoroughly pulverize the resin clumps accumulated at the bottom of the reactor, preventing crusting and shortening the dissolution time. Meanwhile, the top of the stirring mechanism generates a downward axial flow of the upper layer of material in the reactor, pushing it to circulate to the middle and lower dispersion zone, promoting thorough mixing of different layers of material within the reactor. The middle structure of the stirring mechanism can further... The raw materials are thoroughly stirred to ensure a more complete and uniform mixture. The temperature control mechanism allows the lower, middle, and upper zones of the reactor to be at high, medium, and low temperatures, respectively. This ensures rapid dissolution of the raw materials in the lower zone, maintains reaction equilibrium in the middle zone, and suppresses solvent evaporation in the upper zone due to the low temperature. This independent temperature control makes it easier to use when dissolving raw materials. The solvent reflux mechanism recovers and condenses the solvent vapor generated during heating, re-condenses it into liquid, and discharges it back into the reactor. This effectively reduces raw material waste and solvent evaporation loss, making it easier to use when preparing road marking paint. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram showing the crushing mechanism and stirring mechanism of this utility model in disassembled state;

[0015] Figure 3 This is a schematic cross-sectional view of the vessel body of this utility model;

[0016] Figure 4 This is a schematic diagram of the solvent reflux mechanism of this utility model;

[0017] Figure 5 This utility model Figure 4 A diagram illustrating the split state.

[0018] In the diagram: 1. Reactor body; 2. Reactor lid; 3. Discharge pipe; 4. Solenoid valve; 5. Feed pipe; 6. Upper jacket; 7. Middle jacket; 8. Lower jacket; 9. Spiral guide plate; 10. First motor; 11. Crushing blade; 12. Second motor; 13. Spiral conveyor shaft; 14. Stirring shaft; 15. Heat exchanger; 16. Air pump; 17. Annular air inlet pipe; 18. Annular liquid outlet pipe; 19. Suction pipe head; 20. Liquid outlet head. Detailed Implementation

[0019] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 5 The embodiments are described in detail below.

[0020] This embodiment provides a base dissolution reactor for preparing room-temperature solvent-based road marking paint by modifying polymer resins, as shown in the attached figure. Figure 1-5 As shown, the apparatus includes a vessel body 1 and a vessel cover 2. A discharge pipe 3 is fixedly connected to one side of the bottom of the vessel body 1, and a solenoid valve 4 that can control its flow is fixedly installed on the side of the discharge pipe 3. The solenoid valve 4 can control the opening and closing of the discharge pipe 3, thereby facilitating the discharge of the prepared marking paint inside the vessel body 1. A feed pipe 5 that can communicate with the inside of the vessel body 1 is fixedly connected to the upper surface of the vessel cover 2. A sealing cap is threadedly connected to the outside of the feed pipe 5. The raw materials for preparation can be added into the vessel body 1 through the feed pipe 5.

[0021] The vessel body 1 is externally equipped with a temperature control mechanism that can independently control the temperature of different height sections of the vessel body 1. The temperature control mechanism includes an upper jacket 6, a middle jacket 7, a lower jacket 8, and a spiral guide plate 9. The upper jacket 6, middle jacket 7, and lower jacket 8 are respectively fixedly installed on the top, middle, and bottom of the outer side of the vessel body 1. The spiral guide plate 9, which can improve heat transfer efficiency, is fixedly connected inside the upper jacket 6, middle jacket 7, and lower jacket 8. The upper jacket 6 is horizontally aligned with the spiral conveying shaft 13, the middle jacket 7 is horizontally aligned with the stirring shaft 14, and the lower jacket 8 is horizontally aligned with the crushing blade 11. The top and bottom of side 8 are equipped with water inlets and outlets, and the three sets of water inlets and outlets are connected to different external heat source pipes. The heat source pipe connected to the upper jacket 6 continuously circulates and injects a refrigerant at a temperature of less than 40°C into its interior, thereby keeping the upper raw materials at a low temperature and inhibiting solvent evaporation. The heat source pipe connected to the middle jacket 7 circulates and injects a heat medium at a temperature of 50-60°C into its interior, which can maintain the reaction balance of the raw materials in the middle of the vessel 1 and promote reaction efficiency. The heat source pipe connected to the lower jacket 8 injects a heat medium at a temperature of 60-80°C into its interior, which can promote the dissolution rate of the resin at the bottom of the vessel 1, thereby further accelerating the reaction efficiency.

[0022] The bottom of the vessel body 1 is equipped with a crushing mechanism that can crush and stir the raw materials. The crushing mechanism includes a first motor 10 and a crushing blade 11. The first motor 10 is fixedly installed at the center of the lower surface of the vessel body 1 and its output end is connected to the crushing blade 11 through a spline. The crushing blade 11 is set on the inner bottom wall of the vessel body 1 and its rotation diameter is slightly smaller than the inner diameter of the vessel body 1. The first motor 10 drives the crushing blade 11 to rotate at high speed, which can crush the resin block at the bottom of the vessel body 1, thereby preventing the bottom from caking and promoting the dissolution of the resin.

[0023] The vessel lid 2 is fixedly installed at the top of the vessel body 1, and a stirring mechanism for stirring the raw materials in the vessel body 1 is provided at its center. The stirring mechanism and the crushing mechanism are vertically aligned and both are located inside the vessel body 1. The stirring mechanism includes a second motor 12, a spiral conveyor shaft 13, and a stirring shaft 14. The second motor 12 is fixedly installed at the center of the upper surface of the vessel lid 2, and its output end passes through the inside of the vessel lid 2 and is connected to the spiral conveyor shaft 13 via a spline. The stirring shaft 14 is fixedly connected to the bottom end of the spiral conveyor shaft 13, and the stirring shaft 14 and the spiral conveyor shaft 13 can rotate inside the vessel body 1. The second motor 12 can drive the spiral conveyor shaft 13 and the stirring shaft 14 to rotate synchronously. The spiral conveyor shaft 13 rotates in a spiral downward direction, which can continuously convey the raw materials at the top of the vessel body 1 downward, thereby pushing the raw materials at the top to circulate to the middle and lower dispersion zone, promoting more thorough mixing of raw materials at different levels. The stirring shaft 14 can thoroughly stir the raw materials in the vessel body 1, so that they are fully mixed and reacted, thereby forming a high-quality homogeneous solution.

[0024] The upper surface of the vessel lid 2 is provided with a solvent reflux mechanism for condensing and refluxing solvent vapor inside the vessel body 1. The solvent reflux mechanism includes a heat exchanger 15, a vacuum pump 16, an annular inlet pipe 17, and an annular outlet pipe 18. The heat exchanger 15 is fixedly installed on the upper surface of the vessel lid 2, and its inlet end is connected to the outlet end of the vacuum pump 16. The vacuum pump 16 is fixedly installed on the upper surface of the vessel lid 2, and its inlet end is connected to the annular inlet pipe 17. The annular outlet pipe 18 is connected to the outlet end of the heat exchanger 15, and both the annular inlet pipe 17 and the annular outlet pipe 18 are fixedly installed on the inner top wall of the vessel lid 2. The lower surface of the annular inlet pipe 17 is fixedly connected with multiple suction pipe heads 19 arranged in a ring array and communicating with it. The annular outlet pipe... Multiple liquid outlet heads 20, arranged in a ring array and connected to the lower surface of 18, are fixedly connected to it. The operation of the vacuum pump 16 can create a negative pressure in the annular air inlet pipe 17, thereby allowing the bottom suction pipe head 19 to draw out the solvent vapor that has accumulated at the top of the inner lid 2 due to heating and evaporation, and draw the solvent vapor into the heat exchanger 15. The heat exchanger 15 can condense the vapor into liquid solvent, and the liquid solvent flows back into the vessel body 1 from the bottom liquid outlet head 20 of the annular liquid outlet pipe 18. This can greatly reduce the solvent evaporation loss rate, improve the solvent recovery rate, and save costs. At the same time, the liquid solvent flowing back into the vessel body 1 will be conveyed downward by the spiral conveyor shaft 13 to prevent it from accumulating on the solvent surface and affecting the mixing uniformity of the upper raw materials.

[0025] In summary, the steps for using the polymer resin-modified base material dissolution reactor to prepare room-temperature solvent-based road marking paint are as follows:

[0026] 1. After the raw materials are added into the vessel body 1, the first motor 10 and the second motor 12 are controlled to run synchronously. The first motor 10 drives the crushing blade 11 to rotate at high speed to crush the resin blocks at the bottom of the vessel body 1 and promote the dissolution of the resin. The second motor 12 drives the spiral conveyor shaft 13 and the stirring shaft 14 to rotate synchronously. The spiral conveyor shaft 13 rotates in the spiral downward direction to continuously convey the raw materials at the top of the vessel body 1 downward, thereby pushing the raw materials at the top to circulate to the middle and lower dispersion zone, promoting more thorough mixing of raw materials at different levels. The stirring shaft 14 thoroughly stirs the raw materials in the vessel body 1 to ensure thorough mixing and reaction, thereby forming a high-quality homogeneous solution.

[0027] 2. Simultaneously, media of corresponding temperatures are injected into the upper jacket 6, middle jacket 7 and lower jacket 8 through external heat source pipes to keep the upper raw materials at a low temperature and inhibit solvent evaporation; maintain the reaction balance of the middle raw materials and promote reaction efficiency; and promote the dissolution rate of the resin at the bottom of the vessel 1, thereby further accelerating the reaction efficiency.

[0028] 3. Simultaneously, the vacuum pump 16 operates, causing the suction pipe head 19 to extract the solvent vapor that has accumulated at the top of the inner lid 2 due to heating and evaporation, and to draw the solvent vapor into the heat exchanger 15. The heat exchanger 15 condenses the vapor into liquid solvent, and the liquid flows back into the vessel body 1 from the bottom liquid outlet head 20 of the annular liquid outlet pipe 18, thereby greatly reducing the solvent evaporation loss rate, improving the solvent recovery rate, and saving costs. At the same time, the liquid solvent flowing back into the vessel body 1 is transported downward under the action of the spiral conveyor shaft 13, preventing it from accumulating on the solvent surface and affecting the mixing uniformity of the upper raw materials.

[0029] The above description is only for illustrating the present utility model. It should be understood that the present utility model is not limited to the above embodiments, and various modifications that conform to the concept of the present utility model are within the protection scope of the present utility model.

Claims

1. A base dissolution reactor for preparing room-temperature solvent-based road marking paint by modifying polymer resin, comprising a reactor body (1) and a reactor lid (2), characterized in that: The vessel body (1) is provided with a temperature control mechanism that can independently control the temperature of different height parts of the vessel body (1). The bottom of the vessel body (1) is provided with a crushing mechanism that can crush and stir the raw materials. The vessel lid (2) is fixedly installed on the top of the vessel body (1) and a stirring mechanism that can stir the raw materials in the vessel body (1) is provided at its center. The stirring mechanism and the crushing mechanism are vertically corresponding and are both located inside the vessel body (1). The upper surface of the vessel lid (2) is provided with a solvent reflux mechanism that can condense and reflux the solvent vapor in the vessel body (1).

2. The base dissolution reactor for preparing room-temperature solvent-based road marking paint by modifying polymer resin according to claim 1, characterized in that: A discharge pipe (3) is fixedly connected to one side of the bottom of the vessel body (1), and a solenoid valve (4) that can control its flow is fixedly installed on the side of the discharge pipe (3). A feed pipe (5) that can communicate with the inside of the vessel body (1) is fixedly connected to the upper surface of the vessel cover (2).

3. The base dissolution reactor for preparing room-temperature solvent-based road marking paint by modifying polymer resin according to claim 1, characterized in that: The temperature control mechanism includes an upper jacket (6), a middle jacket (7), a lower jacket (8), and a spiral guide plate (9). The upper jacket (6), the middle jacket (7), and the lower jacket (8) are respectively fixedly installed on the top, middle, and bottom of the outer side of the vessel body (1). The upper jacket (6), the middle jacket (7), and the lower jacket (8) are all fixedly connected with spiral guide plates (9) that can improve heat transfer efficiency. The upper jacket (6), the middle jacket (7), and the lower jacket (8) are provided with water inlets and outlets at the top and bottom of their sides, and the three sets of water inlets and outlets are respectively connected to different external heat source pipes.

4. The base dissolution reactor for preparing room-temperature solvent-based road marking paint by modifying polymer resin according to claim 1, characterized in that: The crushing mechanism includes a first motor (10) and a crushing cutter (11). The first motor (10) is fixedly installed at the center of the lower surface of the vessel body (1) and its output end is connected to the crushing cutter (11) via a spline. The crushing cutter (11) is located on the inner bottom wall of the vessel body (1) and its rotation diameter is slightly smaller than the inner diameter of the vessel body (1).

5. The base dissolution reactor for preparing room-temperature solvent-based road marking paint by modifying polymer resin according to claim 1, characterized in that: The stirring mechanism includes a second motor (12), a spiral conveyor shaft (13), and a stirring shaft (14). The second motor (12) is fixedly installed at the center of the upper surface of the lid (2), and its output end passes through the inside of the lid (2) and is connected to the spiral conveyor shaft (13) via a spline. The stirring shaft (14) is fixedly connected to the bottom end of the spiral conveyor shaft (13), and the stirring shaft (14) and the spiral conveyor shaft (13) can rotate inside the lid (1).

6. The base dissolution reactor for preparing room-temperature solvent-based road marking paint by modifying polymer resin according to claim 1, characterized in that: The solvent reflux mechanism includes a heat exchanger (15), a vacuum pump (16), an annular inlet pipe (17), and an annular outlet pipe (18). The heat exchanger (15) is fixedly installed on the upper surface of the vessel lid (2) and its inlet end is connected to the outlet end of the vacuum pump (16). The vacuum pump (16) is fixedly installed on the upper surface of the vessel lid (2) and its inlet end is connected to the annular inlet pipe (17). The annular outlet pipe (18) is connected to the outlet end of the heat exchanger (15), and both the annular inlet pipe (17) and the annular outlet pipe (18) are fixedly installed on the inner top wall of the vessel lid (2). The lower surface of the annular inlet pipe (17) is fixedly connected to a plurality of suction pipe heads (19) that communicate with it and are arranged in an annular array. The lower surface of the annular outlet pipe (18) is fixedly connected to a plurality of outlet heads (20) that communicate with it and are arranged in an annular array.

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