Device and method for preparing water-soluble polyurethane resin dispersion coating agent

Abstract

The invention relates to the technical field of coating agent preparation, in particular to a water-soluble polyurethane resin dispersion coating agent preparation device and method.The water-soluble polyurethane resin dispersion coating agent preparation device comprises a main stirring piece, a plurality of auxiliary stirring pieces and a reaction kettle, the main stirring piece comprises a main gear and a main rod, the main rod is provided with a plurality of main stirring rods, and each auxiliary stirring piece comprises an auxiliary gear, a linkage rod and an auxiliary rod; a plurality of auxiliary stirring rods are arranged on the auxiliary rod, a protective cover is arranged above the reaction kettle, a stirring motor is arranged above the protective cover, a plurality of auxiliary gears and a main rod are driven by a main gear to rotate clockwise, so that a plurality of main stirring rods stir raw materials clockwise, and meanwhile, the auxiliary rods rotate anticlockwise; the plurality of auxiliary stirring rods are used for anticlockwise stirring the raw materials, so that the raw materials are fully mixed, the stirring efficiency is improved, and the bidirectional stirring effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of coating agent preparation, and in particular to a device and method for preparing a water-soluble polyurethane resin dispersion coating agent. Background Art

[0002] A water-soluble polyurethane resin dispersion coating agent is a coating that uses a water-based polymer material as a dispersion medium. The polymer material left after the water evaporates forms a smooth coating film. The coating agent is usually composed of a water-based dispersion of a hydroxyl-functional resin and a non-hydrophilic isocyanate curing agent, and the diluent may contain alkyl glycol esters and cyclic carbonates.

[0003] The prior art patent CN220677863U discloses a device for preparing a water-soluble polyurethane resin dispersion coating agent, comprising a reactor and a stirring assembly; the stirring assembly comprises a mounting cover, a driving motor, a stirring blade, a connector, a reverse transmission structure and an inner cylinder, the inner cylinder is rotationally connected to the reactor, the reverse transmission structure is arranged at the bottom of the inner cylinder and is transmission-connected to the inner cylinder, the mounting cover is detachably connected to the reactor, the driving motor is fixedly mounted on the mounting cover, the stirring blade is fixedly connected to the output end of the driving motor, the connector is fixedly connected to the bottom of the stirring blade, the bottom of the connector is detachably connected to the reverse transmission structure, the driving motor drives the stirring blade to rotate, and when the stirring blade rotates, the connector and the reverse transmission structure transmit power to the inner cylinder, so that the inner cylinder rotates in the opposite direction relative to the stirring blade to stir the raw materials, and the stirring efficiency is improved by the two-way stirring of the stirring blade and the inner cylinder.

[0004] However, in the aforementioned prior art, the motor needs to drive the stirring blades and the inner barrel at the same time. Since the raw materials are loaded in the inner barrel, the motor needs to drive the stirring assembly and the inner barrel to rotate, so as to achieve a two-way stirring effect, but it is easy to cause the motor to overload, thereby reducing the service life of the motor. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for preparing a water-soluble polyurethane resin dispersion coating agent, so as to solve the technical problem that in the prior art, a motor needs to drive the stirring blades and the inner barrel at the same time. Since the raw materials are loaded in the inner barrel, the motor needs to drive the stirring assembly and the inner barrel to rotate, so as to achieve a two-way stirring effect, but it is easy to cause the motor to be overloaded, thereby reducing the service life of the motor.

[0006] To achieve the above-mentioned purpose, the present invention provides a device for preparing a water-soluble polyurethane resin dispersion coating agent, comprising a main stirring member, a plurality of auxiliary stirring members and a reactor, wherein the main stirring member comprises a main gear and a main rod, and the main rod is provided with a plurality of main stirring rods, the auxiliary stirring member comprises an auxiliary gear, a linkage rod and an auxiliary rod, and the auxiliary rod is provided with a plurality of auxiliary stirring rods, a protective cover is provided above the reactor, and a stirring motor is provided above the protective cover, the main gear is provided above the main rod, and the main gear is also provided at the output end of the stirring motor, the main rod is rotatably connected to the reactor and is located in the reactor, and the main gear is located in the protective cover, the auxiliary gear is provided above the linkage rod and is also located in the protective cover, and the main gear is meshed with the corresponding auxiliary gear, the linkage rod is transmission-connected to the auxiliary rod through two bevel gears, and the auxiliary rod is rotatably connected to the reactor through a bearing and is located in the middle of the reactor.

[0007] A bottom cover is arranged below the reactor, the lower part of the reactor has an external thread, a discharge pipe is arranged below the bottom cover, a solenoid valve is arranged on the discharge pipe, the inner side of the bottom cover has an internal thread, and the bottom cover is threadedly connected to the reactor.

[0008] Wherein, a plurality of supporting seats are arranged on the outer side of the reaction kettle, and the linkage rod is rotatably connected with the corresponding supporting seats through bearings and is located inside the supporting seats.

[0009] Among them, the water-soluble polyurethane resin dispersion coating agent preparation device also includes a conical bucket and a plurality of supporting legs, the conical bucket is fixedly connected to the bottom cover, and is located at the inner bottom of the bottom cover, and is also located at the inner bottom of the reactor, and the plurality of supporting legs are respectively fixedly connected to the reactor, and are located on the outside of the reactor, and are also located below the corresponding sub-rods.

[0010] Among them, the water-soluble polyurethane resin dispersion coating agent preparation device also includes a heating mechanism, which includes a plurality of heating rods and a ring, and the ring is provided with a handle. The plurality of heating rods are respectively fixedly connected to the ring and are located below the ring. The plurality of heating rods are also slidably connected to the reactor and extend to the interior of the reactor. The ring is slidably connected to the stirring motor and is sleeved on the outside of the stirring motor.

[0011] Wherein, the heating mechanism further includes a plurality of fixing screws, one end of each fixing screw is provided with a knob, and the sleeve ring is fixedly connected to the protective cover through the corresponding fixing screws and is located above the protective cover.

[0012] The present invention also provides a method for preparing a water-soluble polyurethane resin dispersion coating agent, which is applied to the above-mentioned water-soluble polyurethane resin dispersion coating agent preparation device, comprising the following steps:

[0013] S1: introducing raw materials into the reactor, starting the stirring motor, and making the stirring motor drive the main rod, so that the main stirring rods stir the raw materials clockwise under the action of the main rods;

[0014] S2: At the same time, the main gear drives the auxiliary gears in the plurality of auxiliary stirring members, and the linkage rod rotates under the action of the auxiliary gears. At this time, the auxiliary rod is linked under the action of the two bevel gears, thereby driving the plurality of auxiliary stirring rods to stir the raw materials counterclockwise;

[0015] S3: restarting the plurality of heating rods to heat the raw materials in the reactor;

[0016] S4: After the stirring is completed, the solenoid valve is opened to discharge the raw materials through the discharge pipe, and then the raw materials undergo condensation reaction, amine neutralization reaction and chain extension reaction, and finally a solvent is added to produce a water-soluble polyurethane resin dispersion coating agent.

[0017] The invention discloses a device and method for preparing a water-soluble polyurethane resin dispersion coating agent, comprising a main stirring member, a plurality of auxiliary stirring members and a reaction kettle, wherein the main stirring member comprises a main gear and a main rod, wherein the main rod is provided with a plurality of main stirring rods, the auxiliary stirring member comprises an auxiliary gear, a linkage rod and an auxiliary rod, wherein the auxiliary rod is provided with a plurality of auxiliary stirring rods, a protective cover is provided above the reaction kettle, and a stirring motor is provided above the protective cover, wherein the main gear drives the plurality of auxiliary gears, the main rod rotates clockwise, so that the plurality of main stirring rods stir the raw materials clockwise, and the auxiliary rod rotates counterclockwise, so that the plurality of auxiliary stirring rods stir the raw materials counterclockwise, thereby ensuring that the raw materials are fully mixed, improving the stirring efficiency, and achieving a two-way stirring effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0019] Figure 1 It is a front view of the first embodiment of the present invention.

[0020] Figure 2 The present invention Figure 1 Section view along line AA.

[0021] Figure 3 The present invention Figure 2A partial enlarged view of point B in the middle.

[0022] Figure 4 The present invention Figure 2 Sectional view along the CC line.

[0023] Figure 5 The present invention Figure 2 Sectional view along line DD.

[0024] Figure 6 It is a front view of the second embodiment of the present invention.

[0025] Figure 7 The present invention Figure 6 Cross-sectional view along line EE.

[0026] Figure 8 The present invention Figure 7 Cross-sectional view along line FF.

[0027] Fig. 9 It is a three-dimensional stereogram of the third embodiment of the present invention.

[0028] Fig.10 It is a front view of the third embodiment of the present invention.

[0029] Fig.11 The present invention Fig.10 Sectional view along the GG line.

[0030] Fig.12 The present invention is a flow chart of the steps of preparing a method for a water-soluble polyurethane resin dispersion coating agent.

[0031] 101-reactor, 102-main gear, 103-main rod, 104-main stirring rod, 105-secondary gear, 106-linkage rod, 107-secondary rod, 108-secondary stirring rod, 109-protective cover, 110-stirring motor, 111-bottom cover, 112-external thread, 113-discharge pipe, 114-solenoid valve, 115-internal thread, 116-support seat, 201-conical bucket, 202-support leg, 203-heating rod, 204-ring, 205-handle, 206-fixed screw, 207-knob, 301-rotating column, 302-sliding seat, 303-adjusting motor, 304-thread block, 305-lifting ring, 306-extension plate, 307-sliding track, 308-bottom plate, 309-installation box, 310-driven gear, 311-screw, 312-lifting motor, 313-driving gear. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0033] First embodiment:

[0034] See also Figure 1 to Figure 5 ,in Figure 1 is a front view of a first embodiment of the present invention, Figure 2 The present invention Figure 1 The cross-sectional view along the AA line. Figure 3 The present invention Figure 2 A partial enlarged view of point B in the middle. Figure 4 The present invention Figure 2 Cross-sectional view of the CC line, Figure 5 The present invention Figure 2 Sectional view along line DD.

[0035] The present invention provides a device for preparing a water-soluble polyurethane resin dispersion coating agent, comprising a main stirring member, a plurality of auxiliary stirring members and a reaction kettle 101, wherein the main stirring member comprises a main gear 102 and a main rod 103, wherein the main rod 103 is provided with a plurality of main stirring rods 104, wherein the auxiliary stirring member comprises an auxiliary gear 105, a linkage rod 106 and an auxiliary rod 107, wherein the auxiliary rod 107 is provided with a plurality of auxiliary stirring rods 108, wherein a protective cover 109 is provided above the reaction kettle 101, wherein a stirring motor 110 is provided above the protective cover 109, wherein the main gear 102 is provided above the main rod 103, and wherein the main gear 102 is also provided at the output end of the stirring motor 110, wherein the main rod 103 is rotatably connected to the reaction kettle 101 and is located in the reaction kettle 101, and wherein the main gear 10 2 is located in the protective cover 109, the sub-gear 105 is arranged above the linkage rod 106 and is also located in the protective cover 109, and the main gear 102 is meshed with the corresponding sub-gear 105, the linkage rod 106 is transmission-connected with the sub-rod 107 through two bevel gears, the sub-rod 107 is rotationally connected with the reactor 101 through a bearing, and is located in the middle of the reactor 101, the main gear 102 drives a plurality of sub-gears 105, the main rod 103 rotates clockwise, so that the plurality of main stirring rods 104 stir the raw materials clockwise, and the sub-rod 107 rotates counterclockwise, so that the plurality of sub-stirring rods 108 stir the raw materials counterclockwise, thereby ensuring that the raw materials are fully mixed, improving the stirring efficiency, and achieving the effect of two-way stirring.

[0036] A bottom cover 111 is provided below the reactor 101, the lower part of the reactor 101 has an external thread 112, a discharge pipe 113 is provided below the bottom cover 111, a solenoid valve 114 is provided on the discharge pipe 113, the inner side of the bottom cover 111 has an internal thread 115, the bottom cover 111 is threadedly connected to the reactor 101, and the bottom cover 111 can be moved out of the reactor 101 by rotating the bottom cover 111, so that the inside of the reactor 101 can be easily cleaned.

[0037] Secondly, a plurality of supporting seats 116 are arranged on the outside of the reactor 101, and the linkage rod 106 is rotatably connected to the corresponding supporting seats 116 through bearings and is located inside the supporting seats 116. The supporting seats 116 can facilitate improving the stability of the linkage rod 106 during rotation, and at the same time play a limiting role under the action of the bearings.

[0038] When using the water-soluble polyurethane resin dispersion coating agent preparation device of this embodiment, the raw materials are introduced into the reactor 101, and the stirring motor 110 is started, so that the stirring motor 110 drives the main rod 103, and the multiple main stirring rods 104 stir the raw materials clockwise under the action of the main rod 103, and at the same time, the main gear 102 drives the multiple auxiliary gears 105 in the auxiliary stirring members, and the linkage rod 106 rotates under the action of the auxiliary gear 105. At this time, the auxiliary rod 107 is linked under the action of the two bevel gears, thereby driving the multiple auxiliary stirring rods 108 to stir the raw materials counterclockwise. This design can form a more complex flow pattern of the raw materials in the reactor 101 through two stirring actions in opposite directions, thereby promoting mutual dispersion and mixing between the raw materials, thereby helping to break up the agglomerates in the raw materials, ensuring that various components can be evenly distributed, and improving the quality of the mixture.

[0039] Second embodiment:

[0040] Based on the first embodiment, please refer to Figure 6 to Figure 8 ,in Figure 6 is a front view of a second embodiment of the present invention, Figure 7 The present invention Figure 6 The cross-sectional view of the EE line, Figure 8 The present invention Figure 7 Cross-sectional view along line FF.

[0041] The present invention provides a device for preparing a water-soluble polyurethane resin dispersion coating agent, which also includes a conical bucket 201 and a plurality of supporting legs 202. The conical bucket 201 is fixedly connected to the bottom cover 111 and is located at the inner bottom of the bottom cover 111 and is also located at the inner bottom of the reactor 101. The plurality of supporting legs 202 are respectively fixedly connected to the reactor 101 and are located at the outer side of the reactor 101 and are also located below the corresponding auxiliary rods 107. The conical bucket 201 can facilitate rapid export of raw materials, and the supporting legs 202 can facilitate support of the reactor 101.

[0042] Among them, the water-soluble polyurethane resin dispersion coating agent preparation device also includes a heating mechanism, which includes a plurality of heating rods 203 and a ring 204. The ring 204 is provided with a handle 205. The plurality of heating rods 203 are respectively fixedly connected to the rings 204 and are located below the rings 204. The plurality of heating rods 203 are also slidably connected to the reactor 101 and extend to the interior of the reactor 101. The ring 204 is slidably connected to the stirring motor 110 and is sleeved on the outside of the stirring motor 110. By starting the plurality of heating rods 203, the plurality of heating rods 203 heat the raw materials in the reactor 101, thereby improving the stirring effect of the raw materials.

[0043] Secondly, the heating mechanism also includes a plurality of fixing screws 206, one end of which is provided with a knob 207. The collar 204 is fixedly connected to the protective cover 109 through the corresponding fixing screws 206 and is located above the protective cover 109. The fixing screws 206 can be used to easily fix the collar 204, thereby preventing the collar 204 from loosening.

[0044] When using the water-soluble polyurethane resin dispersion coating agent preparation device of this embodiment, the raw materials can be quickly discharged through the conical bucket 201, the support legs 202 can support the reactor 101, and the multiple heating rods 203 can be started to heat the raw materials in the reactor 101, thereby improving the stirring effect of the raw materials, and the fixing screw 206 can fix the ring 204 to prevent the ring 204 from loosening.

[0045] Third embodiment:

[0046] The water-soluble polyurethane resin dispersion coating agent preparation device further includes an adjusting mechanism and a lifting mechanism. The adjusting mechanism is arranged outside the reaction kettle 101, and the adjusting mechanism is also arranged on the lifting mechanism.

[0047] The adjusting mechanism comprises a rotating column 301, a sliding seat 302 and an adjusting motor 303. Threaded blocks 304 are arranged on both sides of the sliding seat 302. A lifting ring 305 is arranged at one end of the sliding seat 302. An extension plate 306 is arranged at the other end of the sliding seat 302. The rotating column 301 is fixedly connected to the reactor 101 and is located at the outside of the reactor 101. The rotating column 301 is also rotatably connected to the sliding seat 302 through a bearing and is located in the sliding seat 302. The sliding seat 302 is arranged on the lifting mechanism. The adjusting motor 303 is transmission-connected to the rotating column 301 and is located at one end of the rotating column 301 away from the reactor 101.

[0048] The lifting mechanism includes a sliding track 308 and a bottom plate 309. A mounting box 309 is arranged above the sliding track 308. Two driven gears 310 are arranged in the mounting box 309. The driven gears 310 are provided with screws 311, and the screws 311 extend to the bottom plate 309. A lifting motor is arranged above the sliding track 308. A driving gear is arranged at the output end of the lifting motor. The driving gear meshes with the corresponding driven gear 310 and is located between the two driven gears 310 and the bottom plate 309. Between the driven gears 310, the sliding rail 308 is fixedly connected to the bottom plate 309 and is located at one end of the bottom plate 309, and the reactor 101 is suspended at the other end of the bottom plate 309, the sliding seat 302 is slidably connected to the sliding rail 308 and is located in the sliding rail 308, and the two threaded blocks 304 extend to both sides of the sliding rail 308, and the screw 311 is threadedly connected to the corresponding threaded block 304 and is located in the threaded block 304.

[0049] Based on the second embodiment, please refer to Figures 9 to 11 ,in Fig. 9 is a three-dimensional stereogram of a third embodiment of the present invention, Fig.10 is a front view of a third embodiment of the present invention, Fig.11 The present invention Fig.10 Sectional view along the GG line.

[0050] The present invention provides a device for preparing a water-soluble polyurethane resin dispersion coating agent, which also includes an adjusting mechanism and a lifting mechanism. The adjusting mechanism is arranged outside the reaction kettle 101, and the adjusting mechanism is also arranged on the lifting mechanism.

[0051] The adjusting mechanism comprises a rotating column 301, a sliding seat 302 and an adjusting motor 303. Threaded blocks 304 are arranged on both sides of the sliding seat 302. A lifting ring 305 is arranged at one end of the sliding seat 302. An extension plate 306 is arranged at the other end of the sliding seat 302. The rotating column 301 is fixedly connected to the reactor 101 and is located at the outside of the reactor 101. The rotating column 301 is also rotatably connected to the sliding seat 302 through a bearing and is located inside the sliding seat 302. The sliding seat 302 is arranged on the lifting mechanism. The adjusting motor 303 is transmission-connected to the rotating column 301 and is located at one end of the rotating column 301 away from the reactor 101. By starting the adjusting motor 303, the rotating column 301 rotates under the action of the adjusting motor 303, thereby driving the reactor 101 to rotate as a whole. Then, the bottom cover 111 is opened to facilitate the cleaning of the main stirring member and the auxiliary stirring member in the reactor 101.

[0052] Secondly, the lifting mechanism includes a sliding track 308 and a bottom plate 309. A mounting box 309 is arranged above the sliding track 308. Two driven gears 310 are arranged in the mounting box 309. The driven gears 310 are provided with screws 311, and the screws 311 extend to the bottom plate 309. A lifting motor is arranged above the sliding track 308. A driving gear is arranged at the output end of the lifting motor. The driving gear meshes with the corresponding driven gear 310 and is located between the two driven gears 310. The sliding track 308 is fixedly connected to the bottom plate 309 and is located at one end of the bottom plate 309. The reactor 101 is suspended at the other end of the bottom plate 309. The sliding seat 308 is fixedly connected to the bottom plate 309 and is located at one end of the bottom plate 309. The reactor 101 is suspended at the other end of the bottom plate 309. 02 is slidably connected to the sliding track 308 and is located in the sliding track 308, and the two threaded blocks 304 extend to both sides of the sliding track 308, the screw 311 is threadedly connected to the corresponding threaded blocks 304 and is located in the threaded blocks 304, by starting the lifting motor to drive the driving gear clockwise, the driving gear drives the two driven gears 310, and the screw 311 rotates on itself, thereby threading the threaded blocks 304, so that the sliding seat 302 moves upward as a whole, thereby moving the support leg 202 away from the ground, and then controlling the adjustment mechanism to rotate the reactor 101, so as to facilitate the cleaning of the main stirring member and the auxiliary stirring member in the reactor 101.

[0053] When using the water-soluble polyurethane resin dispersion coating agent preparation device of this embodiment, the lifting motor is started to drive the driving gear clockwise, so that the driving gear drives the two driven gears 310, and the screw 311 rotates, thereby threading the threaded block 304, so that the sliding seat 302 moves upward as a whole, and then the supporting leg 202 is moved away from the ground, and then the adjusting motor 303 is started, and the rotating column 301 rotates under the action of the adjusting motor 303, thereby driving the reactor 101 to rotate as a whole, and then the bottom cover 111 is opened, so that the main stirring member and the auxiliary stirring member in the reactor 101 can be easily cleaned.

[0054] Based on the third embodiment, please refer to Fig.12 ,in Fig.12 The present invention is a flow chart of the steps of preparing a method for a water-soluble polyurethane resin dispersion coating agent.

[0055] The present invention also provides a method for preparing a water-soluble polyurethane resin dispersion coating agent, which is applied to the above-mentioned water-soluble polyurethane resin dispersion coating agent preparation device, comprising the following steps:

[0056] S1: introducing raw materials into the reactor 101, starting the stirring motor 110, and making the stirring motor 110 drive the main rod 103, so that the main stirring rods 104 stir the raw materials clockwise under the action of the main rods 103;

[0057] S2: At the same time, the main gear 102 drives the auxiliary gears 105 in the plurality of auxiliary stirring members, and the linkage rod 106 rotates under the action of the auxiliary gear 105. At this time, the auxiliary rod 107 is linked under the action of the two bevel gears, thereby driving the plurality of auxiliary stirring rods 108 to stir the raw materials counterclockwise;

[0058] S3: restarting the plurality of heating rods 203 to heat the raw materials in the reactor 101;

[0059] S4: After the stirring is completed, the solenoid valve 114 is opened to discharge the raw materials through the discharge pipe 113, and then the raw materials undergo condensation reaction, amine neutralization reaction and chain extension reaction, and finally a solvent is added to produce a water-soluble polyurethane resin dispersion coating agent.

[0060] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A device for preparing a water-soluble polyurethane resin dispersion coating agent, characterized in that: The invention comprises a main stirring member, a plurality of auxiliary stirring members and a reactor, wherein the main stirring member comprises a main gear and a main rod, a plurality of main stirring rods are arranged on the main rod, the auxiliary stirring member comprises an auxiliary gear, a linkage rod and an auxiliary rod, a plurality of auxiliary stirring rods are arranged on the auxiliary rod, a protective cover is arranged above the reactor, a stirring motor is arranged above the protective cover, the main gear is arranged above the main rod, and the main gear is also arranged at the output end of the stirring motor, the main rod is rotatably connected with the reactor and is located in the reactor, and the main gear is located in the protective cover, the auxiliary gear is arranged above the linkage rod and is also located in the protective cover, and the main gear is meshed with the corresponding auxiliary gear, the linkage rod is transmission-connected with the auxiliary rod through two bevel gears, and the auxiliary rod is rotatably connected with the reactor through a bearing and is located in the middle of the reactor.

2. The water-soluble polyurethane resin dispersion coating agent preparation device according to claim 1, characterized in that: A bottom cover is arranged below the reactor, the lower part of the reactor has an external thread, a discharge pipe is arranged below the bottom cover, a solenoid valve is arranged on the discharge pipe, the inner side of the bottom cover has an internal thread, and the bottom cover is threadedly connected to the reactor.

3. The device for preparing a water-soluble polyurethane resin dispersion coating agent according to claim 2, characterized in that: A plurality of supporting seats are arranged on the outer side of the reaction kettle, and the linkage rod is rotatably connected with the corresponding supporting seats through bearings and is located inside the supporting seats.

4. The device for preparing a water-soluble polyurethane resin dispersion coating agent according to claim 3, characterized in that: The water-soluble polyurethane resin dispersion coating agent preparation device also includes a conical bucket and a plurality of supporting legs. The conical bucket is fixedly connected to the bottom cover and is located at the inner bottom of the bottom cover and is also located at the inner bottom of the reactor. The plurality of supporting legs are respectively fixedly connected to the reactor and are located at the outside of the reactor and are also located below the corresponding auxiliary rods.

5. The device for preparing a water-soluble polyurethane resin dispersion coating agent according to claim 4, characterized in that: The water-soluble polyurethane resin dispersion coating agent preparation device also includes a heating mechanism, which includes a plurality of heating rods and a collar, wherein the collar is provided with a handle, and the plurality of heating rods are respectively fixedly connected to the collar and are located below the collar, and the plurality of heating rods are also slidably connected to the reactor and extend to the interior of the reactor, and the collar is slidably connected to the stirring motor and is sleeved on the outside of the stirring motor.

6. The device for preparing a water-soluble polyurethane resin dispersion coating agent according to claim 5, characterized in that: The heating mechanism also includes a plurality of fixing screws, one end of each fixing screw is provided with a knob, and the sleeve ring is fixedly connected to the protective cover through the corresponding fixing screws and is located above the protective cover.

7. A method for preparing a water-soluble polyurethane resin dispersion coating agent, applied to the water-soluble polyurethane resin dispersion coating agent preparation device as claimed in claim 6, characterized in that: The steps include: S1: introducing raw materials into the reactor, starting the stirring motor, and making the stirring motor drive the main rod, so that the main stirring rods stir the raw materials clockwise under the action of the main rods; S2: At the same time, the main gear drives the auxiliary gears in the plurality of auxiliary stirring members, and the linkage rod rotates under the action of the auxiliary gears. At this time, the auxiliary rod is linked under the action of the two bevel gears, thereby driving the plurality of auxiliary stirring rods to stir the raw materials counterclockwise; S3: restarting the plurality of heating rods to heat the raw materials in the reactor; S4: After the stirring is completed, the solenoid valve is opened to discharge the raw materials through the discharge pipe, and then the raw materials undergo condensation reaction, amine neutralization reaction and chain extension reaction, and finally a solvent is added to produce a water-soluble polyurethane resin dispersion coating agent.

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