Efficient reaction device for MC nylon synthesis

Abstract

The utility model discloses an efficient reaction device for MC nylon synthesis, and aims to solve the problems of non-uniform stirring, insufficient sealing performance, inconvenience in pouring operation and the like in the prior art. The device comprises a frame, a reaction kettle body, a heating plate, a stirring motor, a sealing cover, a sliding plate, a buoy and the like, the efficient stirring motor and a stainless steel stirring paddle are adopted, the stirring uniformity of materials is improved, uniform distribution of reaction temperature is ensured, and then the synthesis efficiency and the product quality of MC nylon are improved; the sealing system adopts a multi-sealing design, so that gas leakage in the reaction kettle is effectively prevented, the problem of insufficient sealing performance is solved, and the stability of a reaction environment is ensured; according to the pouring system, automatic pouring of molten liquid is achieved through cooperation of a buoy and a sliding plate, pollution and errors caused by manual operation in a traditional device are avoided, and the production efficiency and safety are improved; and the method is convenient to operate, has a relatively high automation level and is suitable for large-scale MC nylon synthesis production.

Description

TECHNICAL FIELD

[0001] The utility model belongs to nylon synthetic technical field, concretely relates to a kind of high-efficiency reaction device for MC nylon synthesis. BACKGROUND

[0002] MC nylon (Monomer Casting Nylon) is an engineering plastic with excellent mechanical properties and wear resistance, widely used in automotive, mechanical parts and chemical equipment fields. Its synthesis is mainly through the ring-opening polymerization of caprolactam (C6H11NO) monomer under the action of catalyst. The temperature, pressure and catalyst control in the reaction process have a decisive influence on the quality of the final product.

[0003] At present, the production equipment of MC nylon mainly consists of reaction kettle, stirring device, electric heating plate and sealing system. The traditional reaction device has the following technical problems:

[0004] 1. Pouring operation is inconvenient: after the reaction is completed, the pouring operation of the melt usually relies on manual control of the inclination angle of the reaction kettle, and the sealing device needs to be manually released. This operation method is not only cumbersome and inefficient, but also easy to introduce external dust or impurities, thereby affecting the purity of the melt and the quality of the product.

[0005] 2. Insufficient sealing performance: the sealing device of the existing reaction kettle often has design deficiencies, especially under special reaction conditions such as high temperature and vacuum, the sealing performance is poor, which easily leads to the entry of external air, affecting the vacuum environment of the reaction, thereby reducing the efficiency of the polymerization reaction, and may cause the quality of the final product to be unstable, especially when the pouring nozzle is exposed, external air will enter the inside of the kettle through the pouring nozzle, affecting the internal reaction. UTILITY MODEL CONTENTS

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a high-efficiency reaction device for MC nylon synthesis, which can realize, improve the reaction efficiency in the synthesis process of MC nylon, enhance the sealing performance, and realize automatic and rapid pouring operation, thereby improving the production efficiency and the quality of the final product.

[0007] To achieve the above purpose, the utility model provides the following technical scheme:

[0008] A kind of high-efficiency reaction device for MC nylon synthesis, including frame and reaction kettle body, the reaction kettle body is suspended in the inside of frame, the inside of the reaction kettle body is hollow and top is open, the two sides of the reaction kettle body are symmetrically provided with extension shaft, the extension shaft is rotatably installed on the two sides of frame, the fastening bolt is screwed on the upper side of the frame, the bottom of the fastening bolt is in contact with the surface of one of the extension shaft, wherein the end of the extension shaft near the fastening bolt is provided with control hand wheel, the surface of the reaction kettle body is provided with electric heating plate, the sealing cover is installed on the top of the reaction kettle body, the sealing cover seals the open top of the reaction kettle body, the pouring nozzle is obliquely arranged on the upper side of the front surface of the reaction kettle body, the pouring nozzle is through with the inside of the reaction kettle body, the front side of the inner wall of the reaction kettle body is vertically provided with the chute, the chute is corresponding with the position of pouring nozzle, the sliding plate is slidably installed in the chute, the sliding plate seals the inside port of pouring nozzle, the fixed block is symmetrically arranged on the lower side of the inside surface of the sliding plate, the float is fixed on the surface of the fixed block.

[0009] Further, the sealing groove is formed on the surface of the two sides of the chute, the sealing convex strip is symmetrically arranged on the two sides of the sliding plate, the sealing convex strip is slidably arranged in the sealing groove, and the sealing rubber pad is glued on the bottom of the sliding plate.

[0010] Further, the connecting rod is symmetrically arranged on the top of the sliding plate, the connecting rod penetrates the upper surface of the sealing cover, the horizontal rod is fixedly arranged on the top of the connecting rod, and the horizontal rod is arranged above the sealing cover.

[0011] Further, the sealing bolt is rotatably arranged on the center surface of the horizontal rod, the upwardly open docking internal thread cylinder is arranged on one side of the upper surface of the sealing cover, and the bottom of the sealing bolt is matched with the inner size of the docking internal thread cylinder.

[0012] Further, the stirring motor is fixedly arranged on the center of the upper surface of the sealing cover, the stirring paddle is arranged on the output shaft of the stirring motor, and the stirring paddle is arranged in the inside of the reaction kettle body.

[0013] Further, the feeding hopper is arranged on the side, away from the docking internal thread cylinder, of the upper surface of the sealing cover, the feeding hopper is through with the inside of the reaction kettle body, and the hopper cover is detachably arranged on the top of the feeding hopper.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] First of all, in the stirring aspect, a combination design of high-efficiency stirring motor and stirring paddle is adopted, the stirring motor optimizes the stirring effect of the material in the reaction kettle by adjusting the output speed. The stirring paddle is made of corrosion-resistant stainless steel material, which ensures long-term stable work in high temperature and high corrosion environment. Compared with the traditional equipment, the material in the reaction kettle can be heated and mixed more uniformly, thereby effectively avoiding the phenomenon of local heating or uneven stirring, ensuring the uniformity of the reaction, and thereby improving the synthesis efficiency of MC nylon and the product quality.

[0016] Secondly, in view of the problem of insufficient sealing performance in the prior art, the utility model discloses a sealing system with multiple sealing structures. The sealing cover is made of stainless steel material, which is tightly sealed with the top of the reaction kettle body, ensuring that the gas in the reaction kettle body will not leak under high temperature and high pressure environment. In addition, the cooperation of the sliding plate and the sealing groove, combined with the design of the sealing rubber pad and the sealing convex strip, further enhances the sealing effect. When a vacuum environment is needed, the tightening effect of the sealing bolt can effectively extrude the sealing rubber pad, thereby improving the sealing performance. These designs effectively solve the problem of poor sealing of traditional reaction devices, prevent external air from entering and affecting the reaction process, and effectively ensure the sealing of the pouring nozzle when the pouring nozzle is retained, thereby improving the stability of the reaction and the quality of the product.

[0017] Thirdly, in the pouring operation aspect, the utility model realizes automatic pouring operation by setting the sliding plate and the float system to automatically control the inclination angle of the reaction kettle body and the up-down movement of the sliding plate. The sliding plate can automatically move up after the reaction is completed through the buoyancy of the float, ensuring that the molten liquid flows smoothly into the mold, and avoiding the pollution of external dust or impurities caused by manual operation in traditional equipment. This design not only simplifies the operation process, but also greatly improves the production efficiency and reduces the risk of human intervention errors. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the installation three-dimensional structure schematic drawing of the utility model;

[0019] Figure 2 It is the section structure schematic drawing of the utility model;

[0020] Figure 3 It is the internal structure schematic drawing of the reaction kettle body of the utility model;

[0021] Figure 4 It is the sliding groove position structure schematic drawing of the utility model;

[0022] Figure 5 It is the sliding plate structure schematic drawing of the utility model;

[0023] Figure 6 It is the Figure 1 A area enlarged structure schematic drawing of the utility model.

[0024] The components represented by the reference numerals in the drawings are listed as follows:

[0025] 1, frame; 101, fastening bolt; 2, reactor body; 21, electric heating plate; 22, extension shaft; 23, control hand wheel; 24, pouring nozzle; 25, chute; 251, sealing groove; 3, sealing cover; 31, feeding hopper; 32, hopper cover; 33, butt joint inner threaded cylinder; 4, stirring motor; 41, stirring paddle; 5, sliding plate; 51, sealing rubber gasket; 52, fixing block; 53, buoy; 54, connecting rod; 55, cross bar; 56, sealing convex strip; 6, sealing bolt. DETAILED DESCRIPTION

[0026] In order to make the purpose and advantages of the utility model more clear and apparent, the utility model is specifically described below in combination with embodiments. It should be understood that the following text is merely used to describe one or several specific implementation manners of the utility model, and does not strictly limit the protection scope specifically requested by the utility model.

[0027] REFERENCE Figures 1-5 As shown in the figure, an efficient reaction device for MC nylon synthesis comprises a frame 1 and a reactor body 2. The reactor body 2 is suspended inside the frame 1, the inside of the reactor body 2 is hollow, the top is open, and extension shafts 22 are symmetrically arranged on the two sides of the reactor body 2. The extension shafts 22 are rotatably installed on the two sides of the frame 1. The extension shafts 22 are made of high-temperature-resistant alloy steel (model: 20CrMo), have strong corrosion resistance, and ensure their stability in a high-temperature and high-pressure environment. The frame 1 is made of high-quality carbon steel, and the surface is sprayed with a corrosion-resistant coating to enhance its oxidation resistance. The rotatable installation of the extension shafts 22 on the two sides of the reactor body 2 is supported by bearings, which realizes the stable rotation of the reactor body and ensures the uniform distribution of temperature during the reaction process.

[0028] A fastening bolt 101 is screwed onto the upper side of the frame 1. The bottom of the fastening bolt 101 is in contact with the surface of one of the extension shafts 22. The end of the extension shaft 22 near the fastening bolt 101 is provided with a control hand wheel 23. The control hand wheel 23 is made of aluminum alloy (model: ADC12) and has good corrosion resistance and mechanical strength, which facilitates the operator to adjust the inclination angle of the reactor body 2 and optimizes the stirring effect of the material. An electric heating plate 21 is arranged on the surface of the reactor body 2. The electric heating plate 21 is made of high-efficiency heat-conducting material (model: ZXD-1234) and converts electrical energy into heat energy to accelerate the heating process of the material in the reactor and ensure the stability of the reaction temperature.

[0029] The sealing cover 3 is arranged on the top of the reaction kettle body 2, and seals the top of the reaction kettle body 2. The sealing cover 3 is made of high-quality stainless steel (model: 304SS), has good sealing performance and high-temperature resistance, and can ensure that the reaction kettle body 2 is effectively sealed under high temperature and high pressure, thereby preventing leakage of the reactants. The pouring nozzle 24 is arranged on the front side surface of the reaction kettle body 2 in an inclined manner, and penetrates the reaction kettle body 2, and is used for pouring the molten liquid after the reaction is completed. The chute 25 is vertically arranged on the inner wall of the reaction kettle body 2, and corresponds to the position of the pouring nozzle 24. The sliding plate 5 is slidably arranged in the chute 25, and seals the inner side port of the pouring nozzle 24. The sliding plate 5 is made of polytetrafluoroethylene (PTFE) material, has strong high-temperature resistance and corrosion resistance, and can effectively ensure the sealing effect. The fixed blocks 52 are symmetrically arranged on the lower side surface of the sliding plate 5, and the floating buoys 53 are fixed to the surfaces of the fixed blocks 52. The floating buoys 53 are made of stainless steel 304, and are automatically driven to move upward with the sliding plate 5 through the buoyancy effect after the reaction is completed, so that the molten liquid is smoothly poured.

[0030] Reference Figure 5 As shown in the figure, the sealing grooves 251 are arranged on the two side surfaces of the chute 25, and the sealing protrusions 56 are symmetrically arranged on the two sides of the sliding plate 5. The two sealing protrusions 56 are respectively slid in the sealing grooves 251. The sealing grooves 251 are made of high-temperature-resistant rubber material (model: VMQ). The sealing protrusions 56 cooperate with the sealing grooves 251 to ensure that the high-temperature and high-pressure environment in the reaction kettle body 2 is not affected by external gas, has good sealing performance, and can effectively prevent leakage or pollution during the reaction process. The sealing rubber pads 51 are glued to the bottom of the sliding plate 5. The sealing rubber pads 51 are made of silica gel material, have excellent elasticity and sealing performance, can cope with the compression deformation problem caused by temperature change during the reaction process, and ensure that the sealing effect is stable for a long time.

[0031] Reference Figure 4 and Figure 5 As shown in the figure, the connecting rods 54 are symmetrically arranged on the top of the sliding plate 5. The connecting rods 54 are made of high-strength alloy steel (model: 42CrMo), have high tensile strength and wear resistance, and can ensure stable connection during the reaction process. The two connecting rods 54 penetrate the upper surface of the sealing cover 3, so that the upward and downward movement of the sliding plate 5 is stable and unobstructed. The cross bars 55 are fixedly arranged on the top of the two connecting rods 54, and are arranged above the sealing cover 3. The cross bars 55 are made of carbon steel, and are fixed by high-strength bolts, and have sufficient strength and stability.

[0032] Reference Figures 1-5As shown, the center surface of the crossbar 55 is rotatably penetrated by a sealing bolt 6 made of high-temperature-resistant alloy steel (model: Hastelloy C-276) with excellent corrosion resistance and high-temperature resistance. The sealing bolt 6 is matched with the butt joint inner threaded cylinder 33 of the sealing cover 3 by rotation, the bottom of the sealing bolt 6 is matched with the inner size of the butt joint inner threaded cylinder 33, which ensures the tight connection of the sealing bolt 6 and the butt joint inner threaded cylinder 33, so as to realize the sealing lifting of the reaction kettle body 2, so as to avoid the gas leakage problem in the reaction process in the vacuum reaction.

[0033] Reference Figures 1-3 As shown, the upper surface of the sealing cover 3 is fixed with a stirring motor 4 made of an internationally renowned brand (model: ABB M3AA132S), the power is 1.5kW, and the rotating speed is adjustable. The output shaft of the stirring motor 4 is provided with a stirring paddle 41, which is arranged in the reaction kettle body 2. The design of the stirring paddle 41 ensures the uniform stirring of the materials in the reaction kettle, promotes the full reaction of caprolactam and catalyst, and improves the polymerization efficiency. The stirring paddle 41 is made of stainless steel (model: 304SS) and is specially treated to enhance its corrosion resistance and wear resistance, ensuring its stability during long-term use.

[0034] Reference Figures 1-3 Figures 1-3 As shown, the upper surface of the sealing cover 3 is provided with a feeding hopper 31 away from the side of the butt joint inner threaded cylinder 33. The feeding hopper 31 is made of corrosion-resistant aluminum alloy material (model: A356) with good high-temperature resistance. The feeding hopper 31 is penetrated with the inside of the reaction kettle body 2, and the top of the feeding hopper 31 is detachably covered with a hopper cover 32. The hopper cover 32 can be easily removed to ensure that the materials are smoothly added during the reaction process, while avoiding the pollution of external impurities. The design of the feeding hopper 31 can ensure that the raw materials are evenly added, avoiding the uneven distribution of raw materials during the synthesis process.

[0035] The utility model discloses a working principle is: MC nylon synthesis's main material is caprolactam, so first through feeding hopper 31 to the inside pouring raw materials of reaction kettle body 2, then add catalyst, through electric heating plate 21 to the inside raw material heating to progress dehydration, in this process, through the stirring motor 4 drive stirring paddle 41 rotation realizes the stirring of inside raw material, caprolactam monomer happens ring opening polymerization under the action of catalyst and cocatalyst, forms the high molecular weight MC nylon, in this process, due to the weight slide 5 is placed in the most lower part of stroke, the slide 5 seals inside port of pouring mouth 24 at this moment, the cooperation of sealing convex strip 56 and sealing groove 251 can not only guarantee the stability when slide 5 slides, but also can improve the sealing property, when needing vacuum reaction, can pass through the sealing bolt 6 of screwing top, make sealing bolt 6 bottom gradually enter to the inside of butt joint internal thread cylinder 33, to realize the depression of cross bar 55, then pass through the slide 5 extrusion of sealing rubber pad 51, further improve the sealing property, during the reaction, the axis of reaction kettle body 2 is perpendicular.

[0036] After the reaction, the pouring work needs to be carried out, at this time, the sealing bolt 6 can be loosened, so that the slide 5 can move up and down freely, then the moving device is moved to the mold, the control hand wheel 23 is rotated to control the overall rotation of the reaction kettle body 2, so that the reaction kettle body 2 is inclined, and the molten liquid inside will be inclined, at this time, the slide 5 can be lifted by the buoyancy of the buoy 53, and the molten liquid can be poured into the mold through the pouring nozzle 24, the height of the cross bar 55 can be observed outside during pouring, so as to judge the height of the slide 5, realize the automatic opening during pouring, after single pouring is completed, the reaction kettle body 2 is returned to normal, at this time, the slide 5 will automatically fall due to gravity, so as to ensure that the reaction kettle body 2 is sealed, prevent external dust from entering the inside of the reaction kettle body 2 through the pouring nozzle 24 during the interval time of pouring, causing pollution to the raw material molten liquid, at the same time, the slide 5 can be moved by manually operating the cross bar 55.

[0037] The above is only the preferred embodiment of the utility model, it should be pointed out that for ordinary technical personnel in this technical field, on the premise of not departing from the principle of the utility model, can make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model, such as no special description and limitation, are implemented according to the conventional means in the field.

Claims

1. A high-efficiency reaction device for MC nylon synthesis, comprising a frame (1) and a reaction kettle body (2), characterized in that: The reaction kettle body (2) is suspended in the frame (1), the inside of the reaction kettle body (2) is hollow, the top is open, the two sides of the reaction kettle body (2) are symmetrically provided with extension shafts (22), the extension shafts (22) are rotatably installed on the two sides of the frame (1), the fastening bolt (101) is screwed on the upper side of the frame (1), the bottom of the fastening bolt (101) is in contact with the surface of one of the extension shafts (22), and the end of the extension shaft (22) near the fastening bolt (101) is provided with a control hand wheel (23); the surface of the reaction kettle body (2) is provided with an electric heating plate (21), the top of the reaction kettle body (2) is provided with a sealing cover (3), the sealing cover (3) seals the open top of the reaction kettle body (2), the front surface of the reaction kettle body (2) is provided with a pouring nozzle (24) inclined upward, the pouring nozzle (24) penetrates the inside of the reaction kettle body (2), the front side of the inner wall of the reaction kettle body (2) is provided with a chute (25) vertically, the chute (25) corresponds to the position of the pouring nozzle (24), the inside of the chute (25) is slidably provided with a sliding plate (5), the sliding plate (5) seals the inside port of the pouring nozzle (24), and the inside surface of the sliding plate (5) is provided with fixed blocks (52) symmetrically at both ends of the lower side, and the surface of the fixed blocks (52) is fixedly provided with floats (53).

2. A high efficiency reaction apparatus for MC nylon synthesis as claimed in claim 1, wherein: The surfaces of the two sides of the chute (25) are provided with sealing grooves (251), and the two sides of the sliding plate (5) are symmetrically provided with sealing protrusions (56), and the two sealing protrusions (56) are respectively slid in the sealing grooves (251).

3. A high efficiency reaction apparatus for MC nylon synthesis as claimed in claim 2, wherein: The top of the sliding plate (5) is symmetrically provided with connecting rods (54), the two connecting rods (54) penetrate the upper surface of the sealing cover (3), the top of the two connecting rods (54) is fixedly provided with a cross rod (55), and the cross rod (55) is arranged above the sealing cover (3).

4. The high efficiency reaction apparatus for MC nylon synthesis according to claim 3, wherein: The center surface of the cross rod (55) is rotatably penetrated by a sealing bolt (6), one side of the upper surface of the sealing cover (3) is provided with an upwardly open butt joint internal threaded cylinder (33), and the bottom of the sealing bolt (6) is matched with the inner size of the butt joint internal threaded cylinder (33).

5. The high efficiency reaction apparatus for MC nylon synthesis of claim 1, wherein: The upper surface of the sealing cover (3) is fixedly provided with a stirring motor (4), the output shaft of the stirring motor (4) is provided with a stirring paddle (41), and the stirring paddle (41) is arranged in the inside of the reaction kettle body (2).

6. A high efficiency reaction apparatus for MC nylon synthesis as claimed in claim 1, wherein: The side, away from the butt joint internal threaded cylinder (33), of the upper surface of the sealing cover (3) is provided with a feeding hopper (31), the feeding hopper (31) penetrates the inside of the reaction kettle body (2), and the top of the feeding hopper (31) is detachably covered with a hopper cover (32).

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