Mixing device for preparing isocyanate

Abstract

The utility model discloses a mixing device for preparing isocyanate, which comprises a mixing tank, a first connecting bearing is arranged above the inner wall of the mixing tank, a transmission pipe is arranged in the first connecting bearing in a penetrating manner, a fixed cylinder is arranged above the transmission pipe, a second connecting bearing is arranged below the inner part of the fixed cylinder, and the second connecting bearing is arranged below the inner part of the fixed cylinder. A rubber ring groove is formed in the inner wall of the fixing cylinder, a rubber sealing ring is installed in the rubber ring groove, an electric heating pipe is installed in the transmission pipe, a buffering air bag is installed above the fixing cylinder, and spiral stirring blades and a heat conduction stirring pipe are installed on the outer surface of the transmission pipe. According to the mixing device for isocyanate preparation, the electric heating pipe is arranged to heat water in the transmission pipe and the heat conduction stirring pipe, so that the heat conduction stirring pipe heats isocyanate preparation raw materials while mixing the isocyanate preparation raw materials, the raw materials are heated more uniformly, and the heating efficiency and the heating effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of isocyanate preparation, in particular to a mixing device for isocyanate preparation. Background Technique

[0002] Isocyanate is the general term for various esters of isocyanic acid; there are mono-isocyanates R—N=C=O and di-isocyanates O=C=N—R—N=C=O; generally, they are liquids with an unpleasant smell; mono-isocyanates easily react with ammonia or amines to form ureas, and easily react with alcohols to form carbamic acid esters (such as ethyl carbamate); isocyanates are an important class of organic synthesis intermediates and are widely used in fields such as polyurethanes, coatings, adhesives, etc.

[0003] Chinese authorized announcement number CN214810328U discloses a mixing device for sulfonyl isocyanate preparation. The mixing device for sulfonyl isocyanate preparation includes a first bracket, a second bracket and a mixing tank. The mixing tank is connected to the second bracket through a clamping component. The mixing tank includes a tank cover, an outer tank body, an inner tank body, a support column, a rotating shaft, a support base, a rotating motor, a feed inlet, a discharge outlet, a connecting ring and a stirring motor. The stirring component includes a stirring shaft, stirring blades and a scraping knife. The clamping component includes an outer ring, an inner ring, a rolling groove and a ball. When the utility model works, the rotating motor drives the tank body to rotate, so that the materials rotate together under force in the inner tank body. At the same time, the stirring motor drives the stirring component to work, and the scraping knife scrapes the materials hanging on the inner surface of the inner tank body for mixing, making the mixing more thorough, effectively solving the problems of long time consumption, slow mixing and uneven stirring of common stirrers.

[0004] Due to the large viscosity and density of isocyanates, the fluidity of isocyanates is poor, resulting in uneven temperature during the mixing of isocyanates by existing mixing devices, causing local overheating of isocyanates and affecting the preparation of isocyanates. For this reason, we propose a mixing device for isocyanate preparation. Content of the Utility Model

[0005] The purpose of the utility model is to provide a mixing device for isocyanate preparation to solve the problem proposed in the above background technique that due to the large viscosity and density of isocyanates, the fluidity of isocyanates is poor, resulting in uneven temperature during the mixing of isocyanates by existing mixing devices, causing local overheating of isocyanates and affecting the preparation of isocyanates.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A mixing device for preparing isocyanate, comprising a mixing tank. Above the inner wall of the mixing tank, a first connecting bearing is installed. Inside the first connecting bearing, a transmission pipe is penetrated. Above the transmission pipe, a fixed cylinder is installed. Below the inner part of the fixed cylinder, a second connecting bearing is installed. Inside the inner wall of the fixed cylinder, a rubber ring groove is opened. Inside the rubber ring groove, a rubber sealing ring is installed. Inside the transmission pipe, an electric heating pipe is installed. Above the fixed cylinder, a buffer airbag is installed. On the outer surface of the transmission pipe, a spiral stirring blade and a heat-conducting stirring pipe are installed.

[0007] Preferably, the heat-conducting stirring pipes are evenly distributed along the outer surface of the transmission pipe, and the heat-conducting stirring pipes are communicated with the transmission pipe.

[0008] Preferably, the transmission pipe is movably connected to the fixed cylinder through the second connecting bearing, and the fixed cylinder is communicated with the buffer airbag.

[0009] Preferably, the rubber sealing ring fits with the rubber ring groove, and the rubber sealing ring fits with the transmission pipe.

[0010] Preferably, the electric heating pipe penetrates through the inner wall of the fixed cylinder, and the electric heating pipe is fixedly connected to the fixed cylinder.

[0011] Preferably, the mixing tank further comprises:

[0012] A stirring motor, which is installed above the mixing tank. At the output end of the stirring motor, a first pulley is installed. On the outer surface of the first pulley, a transmission belt is installed. On the right side of the transmission belt, a second pulley is connected. The second pulley is fixedly connected to the transmission pipe. The transmission pipe is belt-driven with the output end of the stirring motor through the transmission belt, the first pulley and the second pulley.

[0013] Compared with the prior art, the present utility model provides a mixing device for preparing isocyanate, having the following beneficial effects: For the mixing device for preparing isocyanate, by arranging the electric heating pipe to heat the water inside the transmission pipe and the heat-conducting stirring pipe, so that when the heat-conducting stirring pipe mixes the raw materials for preparing isocyanate, it can heat the raw materials at the same time, making the heating of the raw materials more uniform and improving the heating efficiency and heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 For the present utility model Figure 1 The enlarged structural schematic diagram at position A;

[0016] Figure 3This is a schematic diagram of the internal structure of the fixing cylinder of the present utility model.

[0017] In the figure: 1, mixing tank; 2, stirring motor; 3, buffer airbag; 4, transmission pipe; 5, spiral stirring blade; 6, heat-conducting stirring pipe; 7, transmission belt; 8, first pulley; 9, electric heating pipe; 10, fixing cylinder; 11, second pulley; 12, first connecting bearing; 13, rubber ring groove; 14, second connecting bearing; 15, rubber sealing ring. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1-3 , a mixing device for preparing isocyanate, including a mixing tank 1. A first connecting bearing 12 is installed above the inner wall of the mixing tank 1. A transmission pipe 4 passes through the inside of the first connecting bearing 12. A fixing cylinder 10 is installed above the transmission pipe 4. A second connecting bearing 14 is installed below the inside of the fixing cylinder 10; the transmission pipe 4 is movably connected to the fixing cylinder 10 through the second connecting bearing 14. A rubber ring groove 13 is provided on the inner wall of the fixing cylinder 10, and a rubber sealing ring 15 is installed inside the rubber ring groove 13; the rubber sealing ring 15 fits with the rubber ring groove 13, and the rubber sealing ring 15 fits with the transmission pipe 4. An electric heating pipe 9 is installed inside the transmission pipe 4; the electric heating pipe 9 penetrates through the inner wall of the fixing cylinder 10, and the electric heating pipe 9 is fixedly connected to the fixing cylinder 10. A buffer airbag 3 is installed above the fixing cylinder 10; the fixing cylinder 10 is in communication with the buffer airbag 3. A spiral stirring blade 5 and a heat-conducting stirring pipe 6 are installed on the outer surface of the transmission pipe 4; the heat-conducting stirring pipes 6 are evenly distributed along the outer surface of the transmission pipe 4, and the heat-conducting stirring pipes 6 are in communication with the transmission pipe 4; by setting the electric heating pipe 9 to heat the water inside the transmission pipe 4 and the heat-conducting stirring pipes 6, so as to heat the raw materials for preparing isocyanate by the heat-conducting stirring pipes 6 while mixing them, making the raw material heating more uniform and improving the heating efficiency and heating effect; a stirring motor 2, which is installed above the mixing tank 1. A first pulley 8 is installed at the output end of the stirring motor 2. A transmission belt 7 is installed on the outer surface of the first pulley 8. The right side of the transmission belt 7 is connected to a second pulley 11. The second pulley 11 is fixedly connected to the transmission pipe 4. The transmission pipe 4 is belt-driven with the output end of the stirring motor 2 through the transmission belt 7, the first pulley 8 and the second pulley 11.

[0020] Working principle: When using the mixing device for preparing isocyanate, first pour the raw materials for preparing isocyanate into the interior of the mixing tank 1, and then the controller controls the stirring motor 2 to be powered on and work. The driving pipe 4 is driven to rotate through the transmission belt 7, the first pulley 8 and the second pulley 11, and then the spiral stirring blade 5 and the heat-conducting stirring pipe 6 drive to mix and stir the raw materials. Secondly, the controller controls the electric heating pipe 9 to be powered on and work to heat the liquid inside the driving pipe 4. The electric heating pipe 9 is controlled to heat the liquid inside the driving pipe 4 to a certain temperature, and the heat is transferred to the raw materials for preparing isocyanate through the heat-conducting stirring pipe 6 to realize heating of the raw materials for preparing isocyanate. Then, the buffer airbag 3 plays a buffering role to relieve the gas expansion caused by the increase in temperature inside the driving pipe 4. Then, the combination of the spiral stirring blade 5 and the heat-conducting stirring pipe 6 has a better stirring effect on the raw materials for preparing isocyanate. This is the working principle of the mixing device for preparing isocyanate.

[0021] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixing device for preparing isocyanate, characterized in that: include: A mixing tank (1), wherein a first connecting bearing (12) is installed above the inner wall of the mixing tank (1), a transmission pipe (4) is inserted into the interior of the first connecting bearing (12), a fixing cylinder (10) is installed above the transmission pipe (4), a second connecting bearing (14) is installed below the interior of the fixing cylinder (10), a rubber ring groove (13) is opened on the inner wall of the fixing cylinder (10), a rubber sealing ring (15) is installed inside the rubber ring groove (13), an electric heating pipe (9) is installed inside the transmission pipe (4), a buffer airbag (3) is installed above the fixing cylinder (10), and a spiral stirring blade (5) and a heat-conducting stirring pipe (6) are installed on the outer surface of the transmission pipe (4).

2. A mixing device for preparing isocyanate according to claim 1, characterized in that: The heat-conducting stirring tubes (6) are evenly distributed along the outer surface of the transmission tube (4), and the heat-conducting stirring tubes (6) are connected to the transmission tube (4).

3. A mixing device for preparing isocyanate according to claim 1, characterized in that: The transmission tube (4) is movably connected to the fixed tube (10) via a second connecting bearing (14), and the fixed tube (10) is connected to the buffer airbag (3).

4. A mixing device for preparing isocyanate according to claim 1, characterized in that: The rubber sealing ring (15) is fitted with the rubber ring groove (13), and the rubber sealing ring (15) is fitted with the transmission pipe (4).

5. A mixing device for preparing isocyanate according to claim 1, characterized in that: The electric heating tube (9) passes through the inner wall of the fixed tube (10), and the electric heating tube (9) is fixedly connected to the fixed tube (10).

6. A mixing device for preparing isocyanate according to claim 1, characterized in that: The mixing tank (1) is also provided with: A stirring motor (2) is installed above the mixing tank (1); a first pulley (8) is installed at the output end of the stirring motor (2); a transmission belt (7) is installed on the outer surface of the first pulley (8); a second pulley (11) is connected to the right side of the transmission belt (7); the second pulley (11) is fixedly connected to a transmission pipe (4); the transmission pipe (4) realizes belt transmission with the output end of the stirring motor (2) through the transmission belt (7), the first pulley (8) and the second pulley (11).

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