Reaction device for producing highly methylated melamine formaldehyde resin for coatings

Abstract

The invention discloses a reaction device for producing highly methylated melamine formaldehyde resin for coating, comprising a rotating shaft, a driving mechanism I, a stirring mechanism and a kettle body, wherein the upper end of the kettle body is provided with a rotating shaft, the upper end of the kettle body is provided with a driving mechanism I for driving the rotating shaft to rotate, the rotating shaft is provided with a stirring mechanism located in the kettle body, the rotating shaft is provided with an air inlet channel and an exhaust channel, the output end of the exhaust channel is provided with an exhaust rotary joint, the output end of the exhaust rotary joint is provided with an exhaust control mechanism, the stirring mechanism comprises a plurality of stirrers and a driving mechanism II for driving the stirrers to rotate upward, the stirrers are movably arranged on the rotating shaft, the stirrer comprises a connecting arm and an air motor arranged on the free end of the connecting arm, the driving end of the air motor is provided with a stirring paddle, the air inlet end of the air motor is connected with the air inlet channel through a pipeline, and compared with the prior art, the stirring range can be increased, the stirring and mixing effect is good, and the safety is good.

Description

Technical Field

[0001] The invention relates to the technical field of melamine formaldehyde resin production equipment, in particular to the technical field of reaction devices for producing highly methylated melamine formaldehyde resin for coatings. Background Art

[0002] The reactor is a comprehensive reaction vessel. The design of the reactor structure, function and accessories is based on the reaction conditions. From the initial feeding-reaction-discharging, the pre-set reaction steps can be completed with a high degree of automation, and the important parameters such as temperature, pressure, mechanical control (stirring, blasting, etc.), reactant / product concentration, etc. during the reaction process are strictly regulated. Its structure is generally composed of a kettle body, a transmission device, a stirring device, a heating device, a cooling device, and a sealing device.

[0003] The stirring paddles of the existing reactor stirring devices are mostly fixed, with a small stirring range and poor stirring and mixing effect. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to provide a reaction device for producing highly methylated melamine formaldehyde resin for coatings, which can increase the stirring range and achieve good stirring and mixing effects.

[0005] To achieve the above-mentioned purpose, the present invention proposes a reaction device for producing highly methylated melamine formaldehyde resin for coating, comprising a rotating shaft, a driving mechanism I, a stirring mechanism and a kettle body, wherein the upper end of the kettle body is provided with a rotating shaft, the upper end of the kettle body is provided with a driving mechanism I for driving the rotating shaft to rotate, the rotating shaft is provided with a stirring mechanism located in the kettle body, the rotating shaft is provided with an air intake channel and an exhaust channel, the output end of the exhaust channel and the input end of the air intake channel are provided with an air intake and exhaust mechanism, the stirring mechanism comprises a plurality of stirrers and a driving mechanism II for driving the stirrers to rotate upward, the stirrers are movably arranged on the rotating shaft, the stirrer comprises a connecting arm and an air motor arranged on the free end of the connecting arm, the driving end of the air motor is provided with A stirring paddle, the air inlet end of the pneumatic motor is connected with the air inlet channel through a pipeline, the driving mechanism II includes a fixed seat, a sliding seat, an annular telescopic sealing body, a sliding sealing sleeve and a plurality of support arms, the sliding sealing sleeve is arranged on the rotating shaft, the fixed seat is fixedly arranged on the rotating shaft and is located below the sliding sealing sleeve, the sliding sealing sleeve is provided with a sliding seat, a movably connected support arm is provided between the sliding seat and the connecting arm, an annular telescopic sealing body is provided between the fixed seat and the sliding seat, the air outlet end of the pneumatic motor is connected with the internal space of the annular telescopic sealing body, the input end of the exhaust channel is connected with the internal space of the annular telescopic sealing body, and the sliding sealing sleeve adjusts the opening and closing amount of the input end of the exhaust channel.

[0006] Preferably, the sliding seat is provided with a plurality of connection ports, and the connection ports are connected with the air outlet ends of the corresponding pneumatic motors through pipelines.

[0007] Preferably, the intake and exhaust mechanism includes a rotary joint, the inner tube output end of the rotary joint is connected to the input end of the intake channel, the inner tube input end of the rotary joint is connected to the air supply pipe, the outer tube input end of the rotary joint is connected to the output end of the exhaust channel, the outer tube output end of the rotary joint is provided with a three-way joint, and the two output ends of the three-way joint are respectively provided with a flow rate sensor and an automatic valve I.

[0008] Preferably, the driving mechanism I comprises a motor, a driving synchronous wheel, a driven synchronous wheel and a synchronous belt, the driving end of the motor is provided with a driving synchronous wheel, the upper end of the rotating shaft is provided with a driven synchronous wheel, and the driving synchronous wheel and the driven synchronous wheel are provided with a synchronous belt.

[0009] Preferably, the kettle body comprises an inner kettle body, an outer kettle body, a feeding port, a discharging port, a temperature sensor I and a cooling spiral coil; an inner kettle body is arranged in the outer kettle body, a cavity is formed between the inner kettle body and the outer kettle body, a feeding port is arranged at the upper end of the inner kettle body, a discharging port is arranged at the lower end of the inner kettle body, a temperature sensor I is arranged in the inner kettle body, a cooling spiral coil is arranged on the inner wall of the inner kettle body, a water inlet and a water outlet respectively connected to the two ends of the cooling spiral coil are arranged on the inner kettle body, a heating spiral coil is arranged on the outer wall of the inner kettle body, and an oil inlet and an oil outlet respectively connected to the two ends of the heating spiral coil are arranged on the outer kettle body.

[0010] Preferably, it also includes an air supply device, and the output end of the air supply device is connected to the air supply pipe through an automatic valve II.

[0011] Preferably, the air supply device includes an air compressor, a three-way valve I, a three-way valve II, an air tank I, an air tank II and a heating pipe, the input end of the three-way valve I is connected to the output end of the air compressor, the two output ends of the three-way valve I are respectively connected to the air tank I and the air tank II, the two input ends of the three-way valve II are respectively connected to the air tank I and the air tank II, the output end of the three-way valve II is connected to the air supply pipe, the air tank I is provided with a heating pipe, a temperature sensor II and a pressure sensor, and the air tank II is provided with a pressure sensor.

[0012] Preferably, the exhaust channel comprises an upper exhaust channel section and a lower exhaust channel section, the upper exhaust channel section is connected to the lower exhaust channel section via a heat exchange pipe, and the upper exhaust channel section and the lower exhaust channel section are arranged in the rotating shaft.

[0013] Beneficial effects of the present invention: The present invention drives the stirrer to rotate upward through the driving mechanism II, which can increase the stirring range and achieve good stirring and mixing effects.

[0014] The pneumatic motor is used, which can be small in size and good in safety.

[0015] The driving mechanism II uses the gas output by the pneumatic motor to work, which improves energy utilization and reduces the cost of use. It does not need to add a separate power mechanism, thereby reducing the production cost of the equipment and energy consumption.

[0016] The air supply device can realize the supply of heated air and unheated air to the stirring mechanism, thereby improving the heating and cooling efficiency in the kettle body.

[0017] The upper section of the exhaust channel is connected to the lower section of the exhaust channel through a heat exchange pipe, and the heat exchange pipe increases the heat exchange area.

[0018] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic structural diagram of a reaction device for producing highly methylated melamine formaldehyde resin for coatings.

[0020] In the figure: 1-rotating shaft, 2-driving mechanism I, 3-stirring mechanism, 4-kettle body, 5-intake channel, 6-exhaust channel, 7-exhaust rotary joint, 8-tee joint, 9-flow rate sensor, 10-automatic valve I, 11-automatic valve II, 12-air supply device, 13-air supply pipe, 21-motor, 22-active synchronous wheel, 23-driven synchronous wheel, 24-synchronous belt, 31-stirring device, 32-driving mechanism II, 311-connecting arm, 312-pneumatic motor, 313-stirring paddle, 314-pipeline, 321-fixed seat, 322-sliding seat, 323-annular telescopic sealing body, 324-sliding seal Envelope, 325-support arm, 326-connecting port, 41-inner kettle body, 42-outer kettle body, 43-feeding port, 44-discharge port, 45-temperature sensor I, 46-cooling spiral coil, 47-water inlet, 48-water outlet, 49-heating spiral coil, 410-oil inlet, 411-oil outlet, 412-cavity, 121-air compressor, 122-three-way valve I, 123-three-way valve II, 124-gas storage tank I, 125-gas storage tank II, 126-heating pipe, 127-temperature sensor II, 128-pressure sensor, 61-exhaust channel upper section, 62-exhaust channel lower section, 63-heat exchange pipe. DETAILED DESCRIPTION

[0021] See also Figure 1The present invention provides a reaction device for producing highly methylated melamine formaldehyde resin for coating, comprising a rotating shaft 1, a driving mechanism I2, a stirring mechanism 3 and a kettle body 4, wherein the rotating shaft 1 is provided at the upper end of the kettle body 4, the driving mechanism I2 for driving the rotating shaft 1 to rotate is provided at the upper end of the kettle body 4, the stirring mechanism 3 located inside the kettle body 4 is provided on the rotating shaft 1, an air inlet channel 5 and an exhaust channel 6 are provided on the rotating shaft 1, an air inlet and exhaust mechanism is provided at the output end of the exhaust channel 6 and the input end of the air inlet channel 5, the stirring mechanism 3 comprises a plurality of stirrers 31 and a driving mechanism II32 for driving the stirrers 31 to rotate upward, the stirrers 31 are movably provided on the rotating shaft 1, the stirrer 31 comprises a connecting arm 311 and a connecting arm 311 provided at the free end thereof The pneumatic motor 312 on the driving end of the pneumatic motor 312 is provided with a stirring paddle 313, the air inlet end of the pneumatic motor 312 is connected to the air inlet channel 5 through a pipe 314, the driving mechanism II32 includes a fixed seat 321, a sliding seat 322, an annular telescopic sealing body 323, a sliding sealing sleeve 324 and a plurality of support arms 325, the sliding sealing sleeve 324 is arranged on the rotating shaft 1 and cannot rotate, the fixed seat 321 is fixedly arranged on the rotating shaft 1 and is located below the sliding sealing sleeve 324, the sliding sealing sleeve 324 is provided with a sliding seat 322, a movably connected support arm 325 is provided between the sliding seat 322 and the connecting arm 311, and an annular The telescopic sealing body 323, the air outlet end of the pneumatic motor 312 is connected to the internal space of the annular telescopic sealing body 323, the input end of the exhaust channel 6 is connected to the internal space of the annular telescopic sealing body 323, the sliding sealing sleeve 324 adjusts the opening and closing amount of the input end of the exhaust channel 6, and the sliding seat 322 is provided with a plurality of connecting ports 326, and the connecting ports 326 are connected to the air outlet end of the corresponding pneumatic motor 312 through the pipeline 314. The air intake and exhaust mechanism includes a rotary joint 7, the inner tube output end of the rotary joint 7 is connected to the input end of the air intake channel 5, the inner tube input end of the rotary joint 7 is connected to the air supply pipe 13, the outer tube input end of the rotary joint 7 is connected to the output end of the exhaust channel 6, and the rotary joint 7 is connected to the air supply pipe 13. A three-way joint 8 is provided at the output end of the outer tube, and a flow rate sensor 9 and an automatic valve 110 are provided at two output ends of the three-way joint 8, respectively. The driving mechanism 12 comprises a motor 21, an active synchronous wheel 22, a driven synchronous wheel 23 and a synchronous belt 24. The driving end of the motor 21 is provided with an active synchronous wheel 22, and the upper end of the rotating shaft 1 is provided with a driven synchronous wheel 23. The active synchronous wheel 22 and the driven synchronous wheel 23 are provided with a synchronous belt 24. The kettle body 4 comprises an inner kettle body 41, an outer kettle body 42, a feeding port 43, a discharging port 44, a temperature sensor 145 and a cooling spiral coil 46. An inner kettle body 41 is provided in the outer kettle body 42, and a cavity 412 is formed between the inner kettle body 41 and the outer kettle body 42, and the cavity 412 is a vacuum cavity.The upper end of the inner kettle body 41 is provided with a feeding port 43, the lower end of the inner kettle body 41 is provided with a discharge port 44, the inner kettle body 41 is provided with a temperature sensor I45, the inner wall of the inner kettle body 41 is provided with a cooling spiral coil 46, the inner kettle body 41 is provided with a water inlet 47 and a water outlet 48 respectively connected to the two ends of the cooling spiral coil 46, the outer wall of the inner kettle body 41 is provided with a heating spiral coil 49, the outer kettle body 42 is provided with an oil inlet 410 and an oil outlet 411 respectively connected to the two ends of the heating spiral coil 49, and also includes an air supply device 12, the output end of the air supply device 12 is connected to the air supply pipe 13 through an automatic valve II11, and the air supply device 12 includes an air compressor 121, a three-way valve I122, a three-way valve II123, an air storage tank I124, an air storage tank II125 and a heating pipe 12 6. The input end of the three-way valve I122 is connected to the output end of the air compressor 121, and the two output ends of the three-way valve I122 are respectively connected to the air tank I124 and the air tank II125. The two input ends of the three-way valve II123 are respectively connected to the air tank I124 and the air tank II125. The output end of the three-way valve II123 is connected to the air supply pipe 13. The air tank I124 is provided with a heating pipe 126, a temperature sensor II127 and a pressure sensor 128. The air tank II125 is provided with a pressure sensor 128. The exhaust channel 6 includes an upper exhaust channel section 61 and a lower exhaust channel section 62. The upper exhaust channel section 61 is connected to the lower exhaust channel section 62 through a serpentine heat exchange pipe 63. The upper exhaust channel section 61 and the lower exhaust channel section 62 are arranged in the rotating shaft 1. ,

[0022] Working process of the present invention:

[0023] In the working process of the reaction device for producing highly methylated melamine formaldehyde resin for coating of the present invention, raw materials are added into the inner kettle body 41 from the feeding port 43, and then the automatic valve II11 is controlled to be opened, the automatic valve I10 is half opened, and the motor 21 is operated through the PLC controller, and the gas passes through the gas supply pipe 13, the air intake rotary joint 7, the air intake channel 5 and the air motor 312 in sequence, and the air motor 312 drives the stirring paddle 313 to rotate and stir, and the gas passing through the air motor 312 enters the annular telescopic sealing body 323. Since the automatic valve I10 is half opened, the output of the automatic valve I10 and the flow rate sensor 9 is less than the air intake of the annular telescopic sealing body 323, so that the gas in the annular telescopic sealing body 323 gradually increases, thereby pushing the sliding seat 322 to move upward, and the sliding seat 322 drives the support arm 325 and the sliding sealing sleeve 324 to move upward, and the support arm 325 drives the connecting arm 311 to rotate upward, and the connecting arm 311 drives the air motor 312 to rotate upward, and the sliding sealing sleeve 3 24 moves upward, reducing the obstruction of the input port 64 of the lower section 62 of the exhaust channel, the output of the exhaust channel 6 increases, and the monitoring value of the flow rate sensor 9 becomes larger. When it reaches a certain value, the PLC controller controls the automatic valve I10 to be fully opened. At this time, the output of the automatic valve I10 and the flow rate sensor 9 is greater than the air intake of the annular telescopic sealing body 323, and the gas in the annular telescopic sealing body 323 is reduced. The stirring mechanism 3 automatically rotates downward under the action of its own weight, and drives the sliding seat 322 to move downward through the support arm 325. The sliding seat 322 drives the sliding sealing sleeve 324 to move downward, and the obstruction of the input port of the lower section 62 of the exhaust channel is gradually increased until the protrusion 327 on the lower end of the sliding sealing sleeve 324 is against the fixed seat 321, and the monitoring value of the flow rate sensor 9 becomes smaller. When it reaches a certain value, the PLC controller controls the automatic valve I10 to be half-opened, so that the amount of gas in the annular telescopic sealing body 323 increases, and the driving mechanism II32 drives the agitator 31 again to repeat the above action.

[0024] When heating, the PLC controller controls the valve on the oil inlet 410 to open, the heat transfer oil passes through the heating spiral coil 49, the PLC controller controls the heating pipe 126 to work to heat the gas in the gas storage tank I124, and the three-way valve I122 and the three-way valve II123 to switch the passage, so that the air compressor 121, the gas storage tank I124 and the gas supply pipe 13 form a passage. When the temperature sensor I45 reaches a certain value, the PLC controller controls the valve on the oil inlet 410 to close and the heating pipe 126 to stop working. When cooling, the PLC controller controls the valve on the water inlet 47 to open and the three-way valve I122 and the three-way valve II123 to switch the passage, the cooling water passes through the cooling spiral coil 46, and the air compressor 121, the gas storage tank II125 and the gas supply pipe 13 form a passage.

[0025] The PLC controller controls the motor 21 to work, and drives the rotating shaft 1 to rotate through the cooperation of the active synchronous wheel 22, the driven synchronous wheel 23 and the synchronous belt 24, and the rotating shaft 1 drives the stirring mechanism 3 to rotate.

[0026] The temperature sensor II127 monitors the temperature inside the gas tank I124 and sends a signal to the PLC controller. When it reaches a certain value, the PLC controller controls the heating tube 126 to stop. The two pressure sensors 128 monitor the pressure of the gas tank I124 and the gas tank II125 respectively and send a signal to the PLC controller. When it reaches a certain value, the PLC controller controls the air compressor 121 to stop.

[0027] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A reaction device for producing highly methylated melamine formaldehyde resin for coatings, characterized in that: The invention comprises a rotating shaft (1), a driving mechanism I (2), a stirring mechanism (3) and a kettle body (4), wherein the rotating shaft (1) is provided at the upper end of the kettle body (4), the driving mechanism I (2) for driving the rotating shaft (1) to rotate is provided at the upper end of the kettle body (4), the stirring mechanism (3) located inside the kettle body (4) is provided on the rotating shaft (1), an air intake channel (5) and an exhaust channel (6) are provided on the rotating shaft (1), and an air intake and exhaust mechanism (3) is provided at the output end of the exhaust channel (6) and the input end of the air intake channel (5) The stirring mechanism (3) comprises a plurality of stirrers (31) and a driving mechanism II (32) for driving the stirrers (31) to rotate upward, the stirrers (31) are movably arranged on the rotating shaft (1), the stirrers (31) comprise a connecting arm (311) and an air motor (312) arranged on the free end of the connecting arm (311), a stirring paddle (313) is arranged at the driving end of the air motor (312), and an air inlet end of the air motor (312) is connected to an air inlet channel via a pipe (314). (5) is connected, the driving mechanism II (32) comprises a fixed seat (321), a sliding seat (322), an annular telescopic sealing body (323), a sliding sealing sleeve (324) and a plurality of supporting arms (325), the sliding sealing sleeve (324) is arranged on the rotating shaft (1), the fixed seat (321) is fixedly arranged on the rotating shaft (1) and is located below the sliding sealing sleeve (324), the sliding seat (322) is arranged on the sliding sealing sleeve (324), and the sliding seat (3 A movably connected support arm (325) is provided between the fixed seat (321) and the sliding seat (322), an annular telescopic sealing body (323) is provided between the fixed seat (321) and the sliding seat (322), the air outlet end of the pneumatic motor (312) is connected to the internal space of the annular telescopic sealing body (323), the input end of the exhaust channel (6) is connected to the internal space of the annular telescopic sealing body (323), and the sliding sealing sleeve (324) adjusts the opening and closing amount of the input end of the exhaust channel (6).

2. The reaction device for producing highly methylated melamine formaldehyde resin for coatings according to claim 1, characterized in that: The sliding seat (322) is provided with a plurality of connection ports (326), and the connection ports (326) are connected to the air outlet ends of corresponding pneumatic motors (312) through pipelines (314).

3. The reaction device for producing highly methylated melamine formaldehyde resin for coatings according to claim 1, characterized in that: The intake and exhaust mechanism comprises a rotary joint (7), the inner tube output end of the rotary joint (7) is connected to the input end of the intake channel (5), the inner tube input end of the rotary joint (7) is connected to the air supply pipe (13), the outer tube input end of the rotary joint (7) is connected to the output end of the exhaust channel (6), the outer tube output end of the rotary joint (7) is provided with a three-way joint (8), and the two output ends of the three-way joint (8) are respectively provided with a flow rate sensor (9) and an automatic valve I (10).

4. The reaction device for producing highly methylated melamine formaldehyde resin for coatings according to claim 1, characterized in that: The driving mechanism 1 (2) comprises a motor (21), a driving synchronous wheel (22), a driven synchronous wheel (23) and a synchronous belt (24); the driving end of the motor (21) is provided with a driving synchronous wheel (22); the upper end of the rotating shaft (1) is provided with a driven synchronous wheel (23); and the driving synchronous wheel (22) and the driven synchronous wheel (23) are provided with a synchronous belt (24).

5. The reaction device for producing highly methylated melamine formaldehyde resin for coatings according to claim 1, characterized in that: The kettle body (4) comprises an inner kettle body (41), an outer kettle body (42), a feeding port (43), a discharging port (44), a temperature sensor I (45) and a cooling spiral coil (46); the inner kettle body (41) is arranged inside the outer kettle body (42); a cavity (412) is formed between the inner kettle body (41) and the outer kettle body (42); a feeding port (43) is arranged at the upper end of the inner kettle body (41); a discharging port (44) is arranged at the lower end of the inner kettle body (41); 41) is provided with a temperature sensor I (45), the inner wall of the inner kettle body (41) is provided with a cooling spiral coil (46), the inner kettle body (41) is provided with a water inlet (47) and a water outlet (48) respectively connected to the two ends of the cooling spiral coil (46), the outer wall of the inner kettle body (41) is provided with a heating spiral coil (49), and the outer kettle body (42) is provided with an oil inlet (410) and an oil outlet (411) respectively connected to the two ends of the heating spiral coil (49).

6. The reaction device for producing highly methylated melamine formaldehyde resin for coatings according to claim 1, characterized in that: It also includes an air supply device (12), the output end of which is connected to the air supply pipe (13) via an automatic valve II (11).

7. The reaction device for producing highly methylated melamine formaldehyde resin for coatings according to claim 6, characterized in that: The air supply device (12) comprises an air compressor (121), a three-way valve I (122), a three-way valve II (123), an air storage tank I (124), an air storage tank II (125) and a heating pipe (126); an input end of the three-way valve I (122) is in communication with an output end of the air compressor (121); two output ends of the three-way valve I (122) are in communication with the air storage tank I (124) and the air storage tank II (125) respectively; two input ends of the three-way valve II (123) are in communication with the air storage tank I (124) and the air storage tank II (125) respectively; an output end of the three-way valve II (123) is in communication with an air supply pipe (13); a heating pipe (126), a temperature sensor II (127) and a pressure sensor (128) are provided in the air storage tank I (124); and a pressure sensor (128) is provided in the air storage tank II (125).

8. The reaction device for producing highly methylated melamine formaldehyde resin for coatings according to any one of claims 1 to 7, characterized in that: The exhaust channel (6) comprises an upper exhaust channel section (61) and a lower exhaust channel section (62); the upper exhaust channel section (61) is connected to the lower exhaust channel section (62) via a heat exchange pipe (63); and the upper exhaust channel section (61) and the lower exhaust channel section (62) are arranged inside the rotating shaft (1).

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