Feeding device for dimethyl maleate esterification catalyst

Abstract

The utility model relates to the technical field of catalyst production and processing, in particular to a dimethyl maleate esterification catalyst feeding device which comprises a stirring barrel, a rotating rod is rotatably arranged in the center of the interior of the stirring barrel, a plurality of stirring blades are arranged on the outer surface of the rotating rod at equal intervals through a plurality of elastic hinge assemblies, and a plurality of stirring blades are arranged on the outer surface of the rotating rod. A plurality of material suction pipes for upwards conveying materials at the bottom of the stirring barrel are fixedly arranged on the inner wall of the stirring barrel; by arranging the elastic hinge assembly, the stirring blades and the material suction pipe, on one hand, a medium at the bottom of the stirring barrel can be sucked through the material suction pipe, then the sucked medium can be discharged from the top when the material suction pipe gradually contracts from bottom to top, the static state of the bottom medium is broken, and exchange and circulation of the bottom medium and an upper medium are promoted; and on the other hand, the media in the stirring barrel can be impacted through the swinging of the stirring blades, additional turbulent flow and vortex can be generated in the media through the impact effect, and the collision and mixing opportunities between the media are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of catalyst production and processing, in particular to a feeding device for dimethyl maleate esterification catalyst. Background Art

[0002] A catalyst generally refers to a substance that increases the rate of a reaction without changing the overall standard Gibbs free energy change of the reaction.

[0003] A feeding device for dimethyl maleate esterification catalyst is disclosed in Chinese patent publication number CN219765280U. The feeding device for dimethyl maleate esterification catalyst can stir liquid and catalyst through a stirring rod to accelerate the mixing speed.

[0004] However, compared with the existing technologies in related fields, it is difficult for traditional stirring devices to fully drive the medium at the bottom of the stirring drum to participate in the mixing. During the stirring process, the bottom medium is prone to be in a relatively static state, forming a mixing dead corner, thereby prolonging the mixing time. In addition, traditional stirring methods can usually only produce a relatively single flow pattern, and the collision and mixing opportunities between the media are limited. For substances that are difficult to mix evenly, such as catalysts and reactants with different densities and viscosities, the contact opportunities between the catalyst and reactant molecules are reduced, thereby limiting the reaction rate. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background technology, and provide a feeding device for the esterification catalyst of dimethyl maleate.

[0006] The purpose of the utility model is achieved through the following technical scheme: a feeding device for dimethyl maleate esterification catalyst, comprising a mixing drum, a conveying mechanism for feeding is provided at the bottom of the mixing drum, a rotating rod is rotatably provided at the center of the mixing drum, a plurality of stirring blades are evenly spaced on the outer surface of the rotating rod through a plurality of elastic hinge components, a plurality of suction pipes for conveying materials at the bottom upward are fixedly provided on the inner wall of the mixing drum, the rotating rod drives the plurality of stirring blades to rotate through the plurality of elastic hinge components, the suction pipe is made of flexible material and is squeezed and deformed by the stirring blades during operation.

[0007] Preferably, an upper cover is fixedly mounted on the top of the mixing drum, and a driving member is fixedly mounted on the top of the upper cover, and the driving member is used to control the rotation of the rotating rod.

[0008] Preferably, a feed inlet is fixedly provided on one side of the top of the upper cover, and a discharge port is fixedly provided at the center of the bottom of the mixing drum, and the discharge port is communicated with the feed inlet of the conveying mechanism.

[0009] Preferably, the elastic hinge assembly includes a fixing frame fixedly mounted on the outer surface of the rotating rod, a connecting rod is hingedly connected to the interior of the fixing frame via an elastic member rotating shaft, and one end of the connecting rod away from the fixing frame is fixedly connected to the stirring blade.

[0010] Preferably, the suction pipe is made of corrosion-resistant rubber, and the cross-sectional shape of the suction pipe is L-shaped.

[0011] Preferably, the stirring blades are all spiral-shaped, and the side of the stirring blade fixed to the connecting rod and the side cooperating with the suction pipe are both cambered surfaces.

[0012] Beneficial effects:

[0013] The feeding device of the dimethyl maleate esterification catalyst is provided with an elastic hinge component, a stirring blade and a suction pipe. On the one hand, the medium at the bottom of the stirring drum can be sucked in through the suction pipe, and then the sucked medium can be discharged from the top when gradually shrinking from bottom to top, so as to achieve the purpose of transporting the lower medium upward, break the static state of the bottom medium, and promote the exchange and circulation of the bottom medium and the upper medium. On the other hand, the swing of the stirring blade can impact the medium inside the stirring drum, and this impact can generate additional turbulence and vortex in the medium, further increasing the collision and mixing opportunities between the media. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 This is a schematic diagram of the structure of the mixing drum and the conveying mechanism of the utility model;

[0016] Figure 2 This is a schematic diagram of the external structure of the mixing drum of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the mixing drum of the utility model;

[0018] Figure 4 This is a schematic diagram of the state when the stirring blade and the suction pipe of the utility model are separated;

[0019] Figure 5 This is a schematic diagram of the state when the stirring blade of the utility model is in contact with the suction pipe;

[0020] Figure 6This is a schematic diagram of the bottom structure of the rotating rod of the utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the suction pipe of the utility model when it is not contracted;

[0022] Figure 8 This is a schematic diagram of the structure of the suction pipe of the utility model when it shrinks from bottom to top;

[0023] Fig. 9 It is a structural schematic diagram of the elastic hinge assembly of the utility model.

[0024] In the figure: 1, mixing drum; 101, discharge port; 2, conveying mechanism; 3, rotating rod; 4, elastic hinge assembly; 401, fixing frame; 402, elastic member shaft; 403, connecting rod; 5, mixing blade; 6, suction pipe; 7, upper cover; 701, feed port; 8, driving member. DETAILED DESCRIPTION

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] Additional aspects and advantages of the present invention will be further described below in conjunction with the accompanying drawings, and some will become apparent from the following description or be learned through practice of the present invention.

[0027] like Figures 1 to 9 As shown, a feeding device for dimethyl maleate esterification catalyst comprises a mixing drum 1, a conveying mechanism 2 for feeding is provided at the bottom of the mixing drum 1, a rotating rod 3 is rotatably provided at the center of the mixing drum 1, a plurality of mixing blades 5 are evenly spaced on the outer surface of the rotating rod 3 through a plurality of elastic hinge components 4, a plurality of suction pipes 6 for conveying the material at the bottom upward are fixedly provided on the inner wall of the mixing drum 1, when the rotating rod 3 drives the plurality of mixing blades 5 to rotate through the plurality of elastic hinge components 4, the mixing blades 5 cooperate with the suction pipes 6, so that the suction pipes 6 can be gradually contracted from bottom to top, and the mixing blades 5 can be swung in the opposite direction of the rotation of the rotating rod 3, as shown in FIG. Figure 7 and Figure 8As shown, the medium at the bottom of the mixing drum 1 can be sucked in through the suction pipe 6, and then the sucked medium can be discharged from the top when it gradually contracts from bottom to top, so as to achieve the purpose of transporting the lower medium upward, break the static state of the bottom medium, promote the exchange and circulation of the bottom medium and the upper medium, so that the medium in the entire mixing drum 1 can participate in the mixing process, avoid the phenomenon of local uneven mixing, and greatly improve the overall mixing effect of the medium. An upper cover 7 is fixedly installed on the top of the mixing drum 1, and a driving member 8 is fixedly installed on the top of the upper cover 7. The driving member 8 is used to control the rotation of the rotating rod 3. A feed port 701 is fixedly provided on one side of the top of the upper cover 7, and a discharge port 101 is fixedly provided at the center of the bottom of the mixing drum 1. The discharge port 101 is connected to the feed port of the conveying mechanism 2 (a solenoid valve is provided at the position where the conveying mechanism 2 is connected to the discharge port 101).

[0028] like Figures 4 to 9 As shown, the elastic hinge assembly 4 includes a fixing frame 401 fixedly mounted on the outer surface of the rotating rod 3, the fixing frame 401 is hinged with a connecting rod 403 through an elastic member rotating shaft 402, and the end of the connecting rod 403 away from the fixing frame 401 is fixedly connected to the stirring blade 5, the material of the suction pipe 6 is corrosion-resistant rubber, the cross-section of the suction pipe 6 is L-shaped, and the stirring blades 5 are all spiral, such as Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, by using the spiral shape, when the stirring blade 5 contacts the suction pipe 6, the suction pipe 6 is gradually contracted from bottom to top. The side of the stirring blade 5 fixed to the connecting rod 403 and the side cooperating with the suction pipe 6 are both cambered surfaces. By using the cambered surface, the stirring blade 5 can gradually cause the suction pipe 6 to deform, as shown in FIG. Figures 4 to 9 As shown, when the rotating rod 3 drives the multiple stirring blades 5 to rotate through the multiple elastic hinge components 4, the stirring blades 5 cooperate with the suction pipe 6, as shown in FIG. Figure 7 and Figure 8 As shown, the suction pipe 6 can be gradually contracted from bottom to top, and the stirring blade 5 can be swung in the opposite direction of the rotation of the rotating rod 3 (the elastic member inside the elastic member shaft 402 will be twisted at this time). When the stirring blade 5 is separated from the suction pipe 6, the elastic member shaft 402 is used to make the connecting rod 403 drive the stirring blade 5 to be quickly reset (the elastic force of the elastic member when restoring to its original state is used at this time). The reset stirring blade 5 will impact the medium inside the mixing drum 1. This impact can generate additional turbulence and vortexes in the medium, further increasing the collision and mixing opportunities between the media.

[0029] For the esterification reaction of dimethyl maleate, by improving the mixing effect of the medium, the catalyst can be more evenly dispersed in the reactants, increasing the contact opportunities between the catalyst and the reactant molecules, thereby accelerating the reaction, shortening the reaction time, and improving production efficiency.

[0030] The solenoid valve, the conveying mechanism 2 and the driving member 8 described in the present application are well-known technologies in the technical field, so their specific structures and working principles are not described in detail.

[0031] The working process is as follows:

[0032] S1: Figure 1 and Figure 2 As shown, when in use, multiple media (including catalysts) are introduced into the mixing drum 1 from the discharge port 101, and then the driving member 8 controls the rotation of the rotating rod 3 (as shown in FIG. Figure 4 and Figure 6 As shown, Figure 4 is the rotation direction of the rotating rod 3 when it is toward the top of the rotating rod 3, Figure 6 is the rotation direction of the rotating rod 3 when it is toward the bottom end of the rotating rod 3);

[0033] S2: Figure 2 , Figure 3 and Fig. 9 As shown, the rotating rod 3 drives multiple elastic hinge components 4 and multiple stirring blades 5 to rotate;

[0034] S3: Figures 4 to 9 As shown, when the rotating rod 3 drives the multiple stirring blades 5 to rotate through the multiple elastic hinge components 4, the stirring blades 5 cooperate with the suction pipe 6, so that the suction pipe 6 can be gradually contracted from bottom to top, and the stirring blades 5 can be swung in the opposite direction of the rotation of the rotating rod 3 (at this time, the elastic member inside the elastic member shaft 402 will be twisted);

[0035] S4: Figures 4 to 9 As shown, the medium at the bottom of the mixing drum 1 can be sucked in through the suction pipe 6, and then the sucked medium can be discharged from the top when it gradually contracts from bottom to top, so as to achieve the purpose of transporting the lower medium upward, break the static state of the bottom medium, promote the exchange and circulation of the bottom medium and the upper medium, so that the medium in the entire mixing drum 1 can participate in the mixing process, avoid the phenomenon of local uneven mixing, and greatly improve the overall mixing effect of the medium;

[0036] S5: Figures 4 to 9As shown, when the stirring blade 5 is separated from the suction pipe 6, the connecting rod 403 drives the stirring blade 5 to quickly reset by utilizing the elastic member rotating shaft 402 (at this time, the elastic force of the elastic member when restoring to the original state is utilized), and the reset stirring blade 5 impacts the medium inside the stirring drum 1, and this impact can generate additional turbulence and vortex in the medium, further increasing the collision and mixing opportunities between the media (this intermittent impact makes the flow of the medium more complex and disordered, which is conducive to the full mixing of different components, especially for some substances that are difficult to mix evenly, such as catalysts and reactants with different densities and viscosities, which can significantly improve the uniformity of mixing);

[0037] S6: Figure 1 As shown, after the multiple media are mixed, the electromagnetic valve of the conveying mechanism 2 is opened, so that the outlet 101 can inject the media into the conveying mechanism 2, and then the conveying mechanism 2 is used for feeding.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A feeding device for dimethyl maleate esterification catalyst, characterized in that: The invention comprises a mixing drum (1), wherein a conveying mechanism (2) for feeding materials is provided at the bottom of the mixing drum (1), a rotating rod (3) is rotatably provided at the center of the mixing drum (1), a plurality of mixing blades (5) are evenly spaced on the outer surface of the rotating rod (3) via a plurality of elastic hinge assemblies (4), a plurality of suction pipes (6) for conveying materials at the bottom upward are fixedly provided on the inner wall of the mixing drum (1), the rotating rod (3) drives the plurality of mixing blades (5) to rotate via the plurality of elastic hinge assemblies (4), and the suction pipes (6) are made of a flexible material and are squeezed and deformed by the mixing blades (5) during operation.

2. The feeding device of a dimethyl maleate esterification catalyst according to claim 1, characterized in that: An upper cover (7) is fixedly mounted on the top of the mixing drum (1), and a driving member (8) is fixedly mounted on the top of the upper cover (7), wherein the driving member (8) is used to control the rotation of the rotating rod (3).

3. The feeding device of a dimethyl maleate esterification catalyst according to claim 2, characterized in that: A feed port (701) is fixedly provided on one side of the top of the upper cover (7), and a discharge port (101) is fixedly provided at the center of the bottom of the mixing drum (1), and the discharge port (101) is connected to the feed port of the conveying mechanism (2).

4. The feeding device of a dimethyl maleate esterification catalyst according to claim 1, characterized in that: The elastic hinge assembly (4) comprises a fixing frame (401) fixedly mounted on the outer surface of the rotating rod (3); a connecting rod (403) is hingedly connected inside the fixing frame (401) via an elastic member rotating shaft (402); and one end of the connecting rod (403) away from the fixing frame (401) is fixedly connected to the stirring blade (5).

5. The feeding device of a dimethyl maleate esterification catalyst according to claim 4, characterized in that: The material of the suction pipe (6) is corrosion-resistant rubber, and the cross-sectional shape of the suction pipe (6) is L-shaped.

6. The feeding device for the esterification catalyst of dimethyl maleate according to claim 5, characterized in that: The stirring blades (5) are all spiral-shaped, and the side of the stirring blades (5) fixed to the connecting rod (403) and the side cooperating with the suction pipe (6) are both arc surfaces.

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