Mixing device for neutralization reaction of active polyurethane prepolymer

Abstract

The utility model discloses an active polyurethane prepolymer neutralization reaction blending device, which belongs to the technical field of blending, and comprises a blending kettle body, a uniform mixing motor is fixed at the top of the uniform mixing kettle body, a rotating shaft of the uniform mixing motor is concentrically butted with a uniform mixing assembly extending into the center of the uniform mixing kettle body, an inner wall cleaning assembly is rotationally connected to the inner side wall of the uniform mixing kettle body, and a transmission assembly for simultaneously performing meshing transmission on the uniform mixing assembly and the inner wall cleaning assembly is further mounted on the outer side of the uniform mixing kettle body; and an electromagnetic quick switching mechanism for switching and driving the uniform mixing assembly or the transmission assembly is mounted on a rotating shaft of the uniform mixing motor. The device can switch and drive the blending assembly and the transmission assembly at any time under the joint cooperation of the blending motor and the electromagnetic rapid switching mechanism; when the driving transmission assembly is switched, the inner wall cleaning assembly can scrape and clean the inner wall of the uniform mixing kettle body, so that long-term material accumulation on the inner wall is avoided; the device is only provided with one blending motor, so that the overall energy consumption is lower, and the later maintenance cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of mixing, and specifically relates to a mixing device for the neutralization reaction of active polyurethane prepolymer. Background Art

[0002] As the raw material of polyurethane, polyurethane prepolymer is usually obtained by the reaction of isocyanate and polyol. The polyurethane products formed by polyurethane prepolymer include foams, coatings, adhesives, sealants, etc. When discharging the materials after the neutralization reaction of polyurethane prepolymer, the materials are easy to adhere to the inner wall of the mixing cavity, resulting in partial waste of the materials.

[0003] In the existing patent literature, a patent with a publication number of CN 217962530 U and a name of "a mixing device for the production of polyurethane coatings" is provided with two motors for driving. The first motor is used for driving the stirring and mixing, and the second motor is used for driving the cleaning of the inner wall. Since the two motors are not integrated together, the energy consumption of the two motors is higher, and the upfront investment cost and the later maintenance cost are both higher. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a mixing device for the neutralization reaction of active polyurethane prepolymer. With the joint cooperation of the mixing motor and the electromagnetic quick switching mechanism, the driving of the mixing component and the transmission component can be switched at any time; when switching to drive the transmission component, the inner wall cleaning component can scrape and clean the inner wall of the mixing kettle body, thus avoiding long-term accumulation of materials on the inner wall; the device is only provided with one mixing motor, with a higher overall integration level, lower overall energy consumption, and lower upfront investment cost and later maintenance cost.

[0005] To solve the above technical problems, the technical solution of the utility model is realized as follows:

[0006] A mixing device for the neutralization reaction of active polyurethane prepolymer includes a mixing kettle body; a kettle body inlet is provided above the mixing kettle body, and a kettle body outlet is provided below the mixing kettle body; a motor seat is fixed on the top of the mixing kettle body, and a mixing motor is fixed on the motor seat;

[0007] The rotating shaft of the mixing motor is concentrically connected to a mixing component extending to the center of the mixing kettle body. An inner wall cleaning component is rotatably connected to the inner side wall of the mixing kettle body, and a transmission component that simultaneously meshes and drives the mixing component and the inner wall cleaning component is also installed outside the mixing kettle body;

[0008] An electromagnetic quick switching mechanism for switching to drive the mixing component or the transmission component is installed on the rotating shaft of the mixing motor. This electromagnetic quick switching mechanism switches back and forth between the mixing component and the transmission component by the principle of electromagnetic adsorption.

[0009] With the above solution, under the joint cooperation of the mixing motor and the electromagnetic quick-switching mechanism, the device can switch the driving of the mixing component and the transmission component at any time; when switching to drive the transmission component, the inner wall cleaning component can scrape and clean the inner wall of the mixing kettle body at this time, so as to avoid long-term material accumulation on the inner wall; the device is only provided with one mixing motor, with a higher overall integration level, lower overall energy consumption, and lower upfront investment costs and later maintenance costs.

[0010] As a preferred embodiment of an active polyurethane prepolymer neutralization reaction mixing device, the mixing component includes a central shaft, which is rotatably connected in the mixing kettle body and concentrically installed with the rotating shaft of the mixing motor; multiple main mixing rods are linearly arrayed in multiple upper and lower layers along the axial direction of the central shaft and are also circumferentially arrayed along the circumferential direction of the central shaft.

[0011] Among them, multiple auxiliary mixing rods are linearly arrayed along the axial direction of each main mixing rod and are alternately distributed up and down.

[0012] With the above solution, in order to achieve mixing, by setting the mixing component, when the mixing component is driven, the main mixing rods will rotate, and at this time the auxiliary mixing rods will rotate accordingly. The auxiliary mixing rods can increase the mixing amplitude, thereby improving the mixing effect.

[0013] As a preferred embodiment of an active polyurethane prepolymer neutralization reaction mixing device, the inner wall cleaning component includes an annular frame, which is rotatably connected to the inner side wall of the mixing kettle body;

[0014] An L-shaped reference seat is fixed on the inner side wall of the annular frame. A cleaning scraper strip is installed beside the L-shaped reference seat and is vertically arranged and faces the inner side wall of the mixing kettle body. At least two guide shafts I are fixed on the side of the cleaning scraper strip away from the inner side wall of the mixing kettle body, and a spring I for pushing the cleaning scraper strip to move towards the inner side wall of the mixing kettle body is sleeved on the guide shaft I.

[0015] With the above solution, in order to achieve material cleaning, by setting the inner wall cleaning component, when the inner wall cleaning component is driven, the cleaning scraper strip will rotate along with the annular frame. The cleaning scraper strip can comprehensively clean the materials adhered to the inner wall; and the cleaning scraper strip can always be in contact with the inner side wall of the mixing kettle body under the elastic action of the spring I, which can ensure that the cleaning scraper strip fully contacts the inside during rotation, so as to ensure a better scraping effect.

[0016] As a preferred embodiment of an active polyurethane prepolymer neutralization reaction mixing device, the transmission component includes a driving gear, which is rotatably connected in a rotating seat I fixed under the motor seat and is concentrically installed with the rotating shaft of the mixing motor; a driven gear I is also arranged beside the driving gear in the same horizontal plane, and the driving gear and the driven gear I are meshed and driven by a toothed chain;

[0017] The driven gear 1 is also coaxially connected with a transmission shaft, and the driven gear 2 is coaxially connected with the transmission shaft. A driven gear plate meshing with the driven gear 2 is also fixed on the outer side of the annular ring frame;

[0018] A rotating seat is fixed on the outer surface of the mixing kettle body, and the transmission shaft is rotatably connected to the rotating seat;

[0019] Wherein, an avoidance groove is provided on the side wall of the mixing kettle body at the meshing position between the driven gear 2 and the driven gear disc.

[0020] By adopting the above scheme, in order to realize the transmission between the mixing component and the inner wall cleaning component, when the transmission component is driven, the driving gear rotates, and at this time, the driven gear 1 rotates with the driving gear under the transmission of the gear, and at the same time, the driven gear 2 rotates concentrically with the driven gear, and at this time, the driven gear 2 will drive the driven gear disk to rotate, thereby realizing the rotation of the annular ring frame.

[0021] As a preferred embodiment of a device for mixing a neutralization reaction of an active polyurethane prepolymer, the diameter of the driving gear is smaller than the diameter of the driven gear.

[0022] By adopting the above scheme, in order to reduce the load during transmission, the diameter of the driven gear 1 is designed to be larger, so that it will be more labor-saving during meshing transmission, thereby reducing the load of the mixing motor.

[0023] As a preferred embodiment of a neutralization reaction and mixing device for an active polyurethane prepolymer, the electromagnetic quick switching mechanism includes a transmission seat, the interior of which is rotatably connected to a vertically arranged switching shaft;

[0024] An upper transmission rod 1 and an upper transmission rod 2 are concentrically connected above the switching shaft. The upper transmission rod 1 can pass through the interior of the driving gear and cooperate with the upper slot in the rotating shaft of the mixing motor in a concentric limited manner for transmission. The upper transmission rod 2 can cooperate with the second pin in the driving gear in a concentric limited manner for transmission.

[0025] A lower transmission rod is coaxially connected to the lower part of the switching shaft, and the lower transmission rod can be coaxially limited and matched with the lower slot in the central shaft for transmission;

[0026] A vertically arranged guide rod is fixed to one end of the transmission seat away from the switching shaft. Both sides of the guide rod are slidably connected to a second guide shaft fixed to the motor seat. An electromagnet is installed above the guide shaft. A spring for pushing the transmission seat downward is sleeved on the guide shaft. An iron block concentrically installed with the electromagnet is fixed to the upper end of the guide rod.

[0027] Among them, the electromagnet consists of an iron core and a coil wound around the iron core.

[0028] With the above solution, when performing the mixing operation, there is no need to start the electromagnet. Since the electromagnet is not powered on, it does not have magnetism. At this time, the lower transmission rod is in concentric limit fit with the lower slot in the central shaft, while the upper transmission rod two is not in concentric limit fit with the pin two in the driving gear. At this time, only the mixing assembly is driven; when performing the cleaning operation, it is necessary to start the electromagnet. Since the electromagnet is powered on, it has magnetism, and the electromagnet adsorbs the iron block and moves upward. At this time, the lower transmission rod disengages from the concentric limit fit with the lower slot in the central shaft, and then the upper transmission rod two is in concentric limit fit with the pin two in the driving gear. At this time, only the transmission assembly is driven, that is, the inner wall cleaning assembly is driven.

[0029] After adopting the above technical solution, the beneficial effects of the present utility model are as follows:

[0030] 1. With the joint cooperation of the mixing motor and the electromagnetic quick switching mechanism, the device can switch between driving the mixing assembly and the transmission assembly at any time; when switching to drive the transmission assembly, the inner wall cleaning assembly can scrape and clean the inner wall of the mixing kettle at this time, thus avoiding long-term material accumulation on the inner wall; the device is only provided with one mixing motor, with a higher overall integration level, lower overall energy consumption, and lower upfront investment costs and later maintenance costs;

[0031] 2. In order to achieve mixing, by setting up the mixing assembly, when the mixing assembly is driven, the main mixing rod will rotate, and at this time, the auxiliary mixing rod will rotate accordingly. Through the auxiliary mixing rod, the mixing amplitude can be increased, thereby improving the mixing effect;

[0032] 3. In order to achieve the cleaning of the material, by setting up the inner wall cleaning assembly, when the inner wall cleaning assembly is driven, the cleaning scraping strip will rotate along with the annular frame. Through the cleaning scraping strip, the material adhered to the inner wall can be comprehensively cleaned; and the cleaning scraping strip can always be in contact with the inner side wall of the mixing kettle under the elastic action of the first spring, which can ensure that the cleaning scraping strip fully contacts the interior during rotation, thereby ensuring a better scraping effect;

[0033] 4. In order to achieve the transmission between the mixing assembly and the inner wall cleaning assembly, when the transmission assembly is driven, the driving gear rotates. At this time, the first driven gear rotates with the driving gear under the transmission of the gears. At the same time, the second driven gear rotates concentrically with the first driven gear. At this time, the second driven gear drives the driven disk to rotate, thereby realizing the rotation of the annular frame;

[0034] 5. In order to reduce the load during transmission, the diameter of the first driven gear is designed to be larger, so it will be more labor-saving during meshing transmission, thereby reducing the load on the mixing motor;

[0035] 6. When performing the mixing operation, there is no need to start the electromagnet. Since the electromagnet is not powered on, it does not have magnetism. At this time, the lower transmission rod is in concentric limit fit with the lower slot in the central shaft, while the second upper transmission rod is not in concentric limit fit with the second pin in the driving gear. Only the mixing assembly is driven at this time. When performing the cleaning operation, it is necessary to start the electromagnet. Since the electromagnet is powered on, it has magnetism. The electromagnet adsorbs the iron block and moves upward. At this time, the lower transmission rod disengages from the concentric limit fit with the lower slot in the central shaft, and then the second upper transmission rod is in concentric limit fit with the second pin in the driving gear. Only the transmission assembly is driven at this time, that is, the inner wall cleaning assembly is driven. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 is the three-dimensional structure of the present invention Figure 1 ;

[0038] Figure 2 is the three-dimensional structure of the present invention Figure 2 ;

[0039] Figure 3 is hidden Figure 1 the three-dimensional structure diagram after hiding the mixing kettle body in

[0040] Figure 4 is Figure 3 the three-dimensional structure diagram of the mixing assembly in

[0041] Figure 5 is Figure 3 the three-dimensional structure diagram of the inner wall cleaning assembly in

[0042] Figure 6 is Figure 5 the partial enlarged view at A in

[0043] Figure 7 is Figure 3 the three-dimensional structure diagram of the transmission assembly in

[0044] Figure 8 is Figure 3 the state diagram when the electromagnetic quick-switching mechanism drives the stirring in

[0045] Figure 9 is Figure 3 the state diagram when the electromagnetic quick-switching mechanism drives the cleaning in

[0046] Figure 10 To hide Figure 8 The state diagram behind the driving gear in

[0047] Figure 11 For Figure 3 The three-dimensional structure diagram of the upper slot 1 in

[0048] Figure 12 For Figure 4 The three-dimensional structure diagram of the upper slot 2 in

[0049] Figure 13 For Figure 7 The three-dimensional structure diagram of the lower slot in

[0050] Figure 14 For Figure 1 The three-dimensional structure diagram of the mixing kettle body in

[0051] Figure 15 For Figure 14 The three-dimensional structure diagram of the motor base in

[0052] Markings in the figure: 1 - mixing kettle body; 2 - kettle body inlet; 3 - kettle body outlet; 4 - motor base; 5 - mixing motor; 6 - mixing assembly; 601 - central shaft; 602 - main mixing rod; 603 - auxiliary mixing rod; 7 - inner wall cleaning assembly; 701 - annular ring frame; 702 - L-shaped reference seat; 703 - cleaning scraper; 704 - guide shaft 1; 705 - spring 1; 8 - transmission assembly; 801 - driving gear; 802 - rotating seat; 803 - driven gear 1; 804 - tooth chain; 805 - transmission shaft; 806 - driven gear 2; 807 - driven sprocket; 9 - electromagnetic quick switching mechanism; 901 - transmission seat; 902 - switching shaft; 903 - upper transmission rod 1; 904 - upper transmission rod 2; 905 - upper slot 1; 906 - upper slot 2; 907 - lower transmission rod; 908 - lower slot; 909 - guide rod; 910 - guide shaft 2; 911 - electromagnet; 912 - spring 2; 913 - iron block; 10 - rotating seat; 11 - avoidance groove. Specific implementation mode

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0054] As Figures 1 to 3As shown in the figure, an active polyurethane prepolymer neutralization reaction mixing device includes a mixing kettle body 1; a kettle body inlet 2 is provided above the mixing kettle body 1, and a kettle body outlet 3 is provided below the mixing kettle body 1; a motor seat 4 is fixed on the top of the mixing kettle body 1, and a mixing motor 5 is fixed on the motor seat 4;

[0055] The rotating shaft of the mixing motor 5 is concentrically connected to a mixing component 6 extending to the center of the mixing kettle body 1. An inner wall cleaning component 7 is rotatably connected to the inner side wall of the mixing kettle body 1, and a transmission component 8 that meshes and drives both the mixing component 6 and the inner wall cleaning component 7 is further installed on the outside of the mixing kettle body 1;

[0056] An electromagnetic quick switching mechanism 9 for switching to drive the mixing component 6 or the transmission component 8 is installed on the rotating shaft of the mixing motor 5. The electromagnetic quick switching mechanism 9 switches back and forth between the mixing component 6 and the transmission component 8 by using the principle of electromagnetic adsorption.

[0057] With the joint cooperation of the mixing motor 5 and the electromagnetic quick switching mechanism 9, the device can switch to drive the mixing component 6 and the transmission component 8 at any time; when switching to drive the transmission component 8, the inner wall cleaning component 7 can scrape and clean the inner wall of the mixing kettle body 1 at this time, thus avoiding long-term accumulation of materials on the inner wall; the device is only provided with one mixing motor 5, with a higher overall integration degree, lower overall energy consumption, and lower upfront investment costs and later maintenance costs.

[0058] As Figure 4 shown in the figure, the mixing component 6 includes a central shaft 601, and the central shaft 601 is rotatably connected in the mixing kettle body 1 and is concentrically installed with the rotating shaft of the mixing motor 5; multiple upper and lower layers are linearly arranged along the axial direction of the central shaft 601, and multiple main mixing rods 602 are circumferentially arranged along the circumferential direction of the central shaft 601;

[0059] Among them, multiple auxiliary mixing rods 603 are linearly arranged along the axial direction of each main mixing rod 602 and are alternately distributed up and down.

[0060] In order to achieve mixing, by setting the mixing component 6, when the mixing component 6 is driven, the main mixing rods 602 will rotate, and at this time the auxiliary mixing rods 603 will rotate accordingly. The auxiliary mixing rods 603 can increase the mixing amplitude, thereby improving the mixing effect.

[0061] As Figures 5 to 6 shown in the figure, the inner wall cleaning component 7 includes an annular frame 701, and the annular frame 701 is rotatably connected to the inner side wall of the mixing kettle body 1;

[0062] On the inner side wall of the annular ring frame 701, an L-shaped reference seat 702 is fixed. Beside the L-shaped reference seat 702, a cleaning scraper strip 703 is installed vertically and facing the inner side wall of the mixing kettle body 1. On the side of the cleaning scraper strip 703 away from the inner side wall of the mixing kettle body 1, at least two guide shafts 704 are fixed. A first spring 705 for pushing the cleaning scraper strip 703 to move towards the inner side wall of the mixing kettle body 1 is sleeved on the guide shaft 704.

[0063] To achieve the cleaning of the material, by setting the inner wall cleaning component 7, when the inner wall cleaning component 7 is driven, the cleaning scraper strip 703 will rotate following the annular ring frame 701. Through the cleaning scraper strip 703, the material adhered to the inner wall can be comprehensively cleaned; and under the elastic action of the first spring 705, the cleaning scraper strip 703 can always be in contact with the inner side wall of the mixing kettle body 1, which can ensure that the cleaning scraper strip 703 fully contacts the inside during rotation, so as to ensure a better scraping effect.

[0064] As Figure 7 、 Figures 14 to 15 As shown in the figure, the transmission component 8 includes a driving gear 801, which is rotatably connected in a first rotating seat 802 fixed under the motor seat 4, and the driving gear 801 is concentrically installed with the rotating shaft of the mixing motor 5; beside the driving gear 801, a first driven gear 803 is also arranged in the same horizontal plane, and the driving gear 801 and the first driven gear 803 are meshed and driven by a tooth chain 804;

[0065] A transmission shaft 805 is also concentrically connected to the first driven gear 803, a second driven gear 806 is concentrically connected to the transmission shaft 805, and a driven gear disc 807 meshing with the second driven gear 806 is fixed on the outer side of the annular ring frame 701;

[0066] Among them, a second rotating seat 10 is fixed on the outer side surface of the mixing kettle body 1, and the transmission shaft 805 is rotatably connected in the second rotating seat 10;

[0067] Among them, an avoidance groove 11 is penetrated and opened on the side wall of the mixing kettle body 1 at the meshing position of the second driven gear 806 and the driven gear disc 807.

[0068] To achieve the transmission between the mixing component 6 and the inner wall cleaning component 7, when the transmission component 8 is driven, the driving gear 801 rotates. At this time, the first driven gear 803 rotates with the driving gear 801 under the gear transmission. At the same time, the second driven gear 806 rotates concentrically with the first driven gear 803. At this time, the second driven gear 806 will drive the driven gear disc 807 to rotate, so as to realize the rotation of the annular ring frame 701.

[0069] As Figure 7As shown, the diameter of the driving gear 801 is smaller than that of the first driven gear 803. To reduce the load during transmission, the diameter of the first driven gear 803 is designed to be larger, so it will be more labor-saving during meshing transmission, thereby reducing the load on the mixing motor 5.

[0070] As Figures 8 to 13 shown, the electromagnetic type quick switching mechanism 9 includes a transmission seat 901, and a vertically arranged switching shaft 902 is rotatably connected inside the transmission seat 901;

[0071] Above the switching shaft 902, a first upper transmission rod 903 and a second upper transmission rod 904 are concentrically butted. The first upper transmission rod 903 can pass through the inside of the driving gear 801 and be in concentric limit fit transmission with the first upper slot 905 inside the rotating shaft of the mixing motor 5, and the second upper transmission rod 904 can be in concentric limit fit transmission with the second pin inside the driving gear 801;

[0072] Below the switching shaft 902, a lower transmission rod 907 is concentrically butted. The lower transmission rod 907 can be in concentric limit fit transmission with the lower slot 908 inside the central shaft 601;

[0073] One end of the transmission seat 901 far from the switching shaft 902 is also fixed with a vertically arranged guide rod 909. Both sides of the rod body of the guide rod 909 are slidably connected to the second guide shaft 910 fixed on the motor base 4. An electromagnet 911 is installed above the guide shaft. A second spring 912 for pushing the transmission seat 901 to move downward is sleeved on the guide shaft. An iron block 913 concentrically installed with the electromagnet 911 is fixed at the upper end of the guide rod 909;

[0074] Among them, the electromagnet 911 is composed of an iron core and a coil wound around the iron core.

[0075] During the mixing operation, there is no need to start the electromagnet 911. Since the electromagnet 911 is not powered on, the electromagnet 911 does not have magnetism. At this time, the lower transmission rod 907 is in concentric limit fit with the lower slot 908 inside the central shaft 601, while the second upper transmission rod 904 is not in concentric limit fit with the second pin inside the driving gear 801. At this time, only the mixing assembly 6 is driven; during the cleaning operation, it is necessary to start the electromagnet 911. Since the electromagnet 911 is powered on, the electromagnet 911 has magnetism, and the electromagnet 911 adsorbs the iron block 913 to move upward. At this time, the lower transmission rod 907 is disengaged from the concentric limit fit with the lower slot 908 inside the central shaft 601, and then the second upper transmission rod 904 is in concentric limit fit with the second pin inside the driving gear 801. At this time, only the transmission assembly 8 is driven, that is, the inner wall cleaning assembly 7 is driven.

[0076] The working principle of the present utility model:

[0077] During application, raw materials are injected from the kettle body inlet 22, and then the raw materials are mixed evenly. After the neutralization reaction is completed, the polyurethane prepolymer is discharged from the kettle body outlet 33.

[0078] During mixing, there is no need to start the electromagnet 911. Since the electromagnet 911 is not powered on, the electromagnet 911 does not have magnetism. At this time, the lower transmission rod 907 is concentrically and limitably matched with the lower slot 908 in the central shaft 601, while the upper transmission rod two 904 is not concentrically and limitably matched with the pin two in the driving gear 801. At this time, only the mixing assembly 6 is driven; when the mixing assembly 6 is driven, the main mixing rod 602 will rotate, and at this time, the auxiliary mixing rod 603 will rotate accordingly. The amplitude of mixing can be increased through the auxiliary mixing rod 603, thereby improving the mixing effect.

[0079] During cleaning, it is necessary to start the electromagnet 911. Since the electromagnet 911 is powered on, the electromagnet 911 has magnetism. The electromagnet 911 adsorbs the iron block 913 and moves upward. At this time, the lower transmission rod 907 is disengaged from the concentric and limitably matched with the lower slot 908 in the central shaft 601. Subsequently, the upper transmission rod two 904 is concentrically and limitably matched with the pin two in the driving gear 801. At this time, only the transmission assembly 8 is driven, that is, the inner wall cleaning assembly 7 is driven; when the transmission assembly 8 is driven, the driving gear 801 rotates. At this time, the driven gear one 803 rotates with the driving gear 801 under the transmission of the gears. At the same time, the driven gear two 806 rotates concentrically with the driven gear one 803. At this time, the driven gear two 806 will drive the driven gear disc 807 to rotate, thereby realizing the rotation of the annular frame 701. The material scraping strip 703 will follow the rotation of the annular frame 701. The materials adhered to the inner wall can be comprehensively cleaned through the material scraping strip 703.

[0080] In summary, since there is only one mixing motor 5 provided in this device, the overall integration degree is higher, the overall energy consumption is lower, and both the upfront investment cost and the later maintenance cost are lower.

[0081] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mixing device for neutralization reaction of active polyurethane prepolymer, comprising a mixing kettle (1); a kettle inlet (2) is provided on the top of the mixing kettle (1), and a kettle outlet (3) is provided on the bottom of the mixing kettle (1); a motor seat (4) is fixed on the top of the mixing kettle (1), and a mixing motor (5) is fixed on the motor seat (4); Features: The rotating shaft of the mixing motor (5) is coaxially connected to a mixing assembly (6) extending into the center of the mixing kettle (1); an inner wall cleaning assembly (7) is rotatably connected to the inner wall of the mixing kettle (1); and a transmission assembly (8) is also installed on the outer side of the mixing kettle (1) for meshing and transmitting the mixing assembly (6) and the inner wall cleaning assembly (7) at the same time; An electromagnetic quick switching mechanism (9) for switching the driving mixing component (6) or the transmission component (8) is installed on the rotating shaft of the mixing motor (5). The electromagnetic quick switching mechanism (9) switches back and forth between the mixing component (6) and the transmission component (8) by using the principle of electromagnetic adsorption.

2. The active polyurethane prepolymer neutralization reaction mixing device according to claim 1, characterized in that: The mixing assembly (6) comprises a central shaft (601), which is rotatably connected to the mixing kettle body (1) and is installed coaxially with the rotating shaft of the mixing motor (5); the central shaft (601) has multiple layers of upper and lower linear arrays along its axial direction and multiple main mixing rods (602) along its circumferential circular array.

3. The active polyurethane prepolymer neutralization reaction mixing device according to claim 2, characterized in that: Each of the main mixing rods (602) is provided with a plurality of auxiliary mixing rods (603) arranged alternately up and down in a linear array along its axial direction.

4. The active polyurethane prepolymer neutralization reaction mixing device according to claim 3, characterized in that: The inner wall cleaning assembly (7) comprises an annular ring frame (701), and the annular ring frame (701) is rotatably connected to the inner wall of the mixing kettle body (1); An L-shaped reference seat (702) is fixed on the inner wall of the annular ring frame (701), and a cleaning scraper (703) is installed on one side of the L-shaped reference seat (702) and is vertically arranged and faces the inner wall of the mixing kettle body (1). At least two guide shafts (704) are fixed on the side of the cleaning scraper (703) away from the inner wall of the mixing kettle body (1), and a spring (705) is mounted on the guide shaft (704) to push the cleaning scraper (703) to move toward the inner wall of the mixing kettle body (1).

5. The active polyurethane prepolymer neutralization reaction mixing device according to claim 4, characterized in that: The cleaning scraper (703) can always contact the inner wall of the mixing kettle body (1) under the elastic action of the spring 1 (705).

6. The active polyurethane prepolymer neutralization reaction mixing device according to claim 5, characterized in that: The transmission assembly (8) comprises a driving gear (801), the driving gear (801) being rotatably connected to a rotating seat (802) fixed under the motor seat (4), the driving gear (801) being coaxially mounted with the rotating shaft of the mixing motor (5); a driven gear (803) located in the same horizontal plane is also arranged beside the driving gear (801), and the driving gear (801) and the driven gear (803) are meshed and transmitted via a toothed chain (804); The driven gear one (803) is also coaxially connected to a transmission shaft (805), and the driven gear two (806) is coaxially connected to the transmission shaft (805). A driven gear plate (807) that meshes with the driven gear two (806) is also fixed on the outer side of the annular ring frame (701).

7. The active polyurethane prepolymer neutralization reaction mixing device according to claim 6, characterized in that: A second rotating seat (10) is fixed on the outer side of the mixing kettle body (1), and the transmission shaft (805) is rotatably connected to the second rotating seat (10); An avoidance groove (11) is provided on the side wall of the mixing kettle body (1) at the meshing position between the second driven gear (806) and the driven gear plate (807).

8. The active polyurethane prepolymer neutralization reaction mixing device according to claim 7, characterized in that: The diameter of the driving gear (801) is smaller than the diameter of the driven gear 1 (803).

9. The active polyurethane prepolymer neutralization reaction mixing device according to claim 8, characterized in that: The electromagnetic fast switching mechanism (9) comprises a transmission seat (901), wherein the transmission seat (901) is internally rotatably connected to a vertically arranged switching shaft (902); An upper transmission rod 1 (903) and an upper transmission rod 2 (904) are coaxially connected to the upper side of the switching shaft (902); the upper transmission rod 1 (903) can pass through the interior of the driving gear (801) and coaxially limit the transmission with the upper slot 1 (905) in the rotating shaft of the mixing motor (5); and the upper transmission rod 2 (904) can coaxially limit the transmission with the latch pin 2 in the driving gear (801); A lower transmission rod (907) is coaxially connected to the lower portion of the switching shaft (902), and the lower transmission rod (907) can be coaxially limitedly matched with a lower slot (908) in the central shaft (601) for transmission; A vertically arranged guide rod (909) is fixed to one end of the transmission seat (901) away from the switching shaft (902); both sides of the guide rod (909) are slidably connected to a second guide shaft (910) fixed to the motor seat (4); an electromagnet (911) is installed above the guide shaft; a second spring (912) for pushing the transmission seat (901) to move downward is sleeved on the guide shaft; an iron block (913) installed concentrically with the electromagnet (911) is fixed to the upper end of the guide rod (909).

10. The active polyurethane prepolymer neutralization reaction mixing device according to claim 9, characterized in that: The electromagnet (911) is composed of an iron core and a coil wound around the iron core; When the electromagnet (911) is not energized, the electromagnet (911) does not have magnetism, and the lower transmission rod (907) is in a concentric limited position fit with the lower slot (908) in the central shaft (601), while the upper transmission rod (904) is not in a concentric limited position fit with the second latch in the driving gear (801); When the electromagnet (911) is energized, the electromagnet (911) has magnetism, and the electromagnet (911) attracts the iron block (913) to move upward, at which time the lower transmission rod (907) is disengaged from the concentric limiting engagement with the lower slot (908) in the central shaft (601), and then the upper transmission rod 2 (904) is concentrically limitedly engaged with the second latch pin in the driving gear (801).

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