Pyromellitic dianhydride feeding device

Abstract

The utility model provides a pyromellitic dianhydride feeding device, which belongs to the technical field of pyromellitic dianhydride production and comprises a feeding box, a feeding port is arranged on the feeding box, and a filtering mechanism, an anti-solidification mechanism and a conveying mechanism are arranged on the feeding box. The filtering mechanism comprises a plurality of fixing blocks arranged in the feeding box, a filtering sieve is fixedly arranged on the fixing blocks, and a discharging module used for guiding impurities out is arranged at the tail end of the filtering sieve; the anti-solidification mechanism comprises a mounting plate arranged on the side wall of the feeding box and an air guide pipe arranged at the bottom of the feeding box, a high-pressure air pump is fixedly arranged on the mounting plate, the input end of the high-pressure air pump is connected with an air suction pipe, and the output end of the high-pressure air pump is connected with the air guide pipe through an air conveying pipe. Compared with the prior art, the vacuum conveying mechanism has the advantages that shutdown time caused by material blockage or solidification is avoided, continuous operation is achieved, production efficiency is improved, loss of materials in the conveying process is reduced by the aid of the vacuum conveying technology, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of homogenous anhydride production, in particular to a homogenous anhydride feeding device. Background Art

[0002] Pyromellitic dianhydride, also known as pyromellitic anhydride, occurs as white or slightly yellow crystals in its pure form. When exposed to humid air, it rapidly absorbs moisture and hydrolyzes into pyromellitic acid. It is soluble in organic solvents such as dimethyl sulfoxide, dimethylformamide, and acetone, but insoluble in ether, chloroform, and benzene. It is primarily used as a raw material for polyimides, a curing matting agent for epoxy resins, and a crosslinking agent for polyester resins.

[0003] In the existing processing of anhydrides, the anhydride raw materials need to be poured into a reaction vessel. However, during this process, impurities in the raw materials and the solidification of the raw materials during transportation will affect the subsequent reaction effect of the anhydride, and thus affect the performance and quality of the final product. Utility Model Content

[0004] In view of this, the utility model provides a homogenized anhydride feeding device, which can not only effectively remove impurities in the raw materials through a filtering mechanism, but also use an anti-coagulation mechanism to make the homogenized anhydride raw materials stored in the feeding box surge, prevent the raw materials from coagulating, and avoid affecting the subsequent reaction effects. Finally, the conveying mechanism with a vacuum effect is used to introduce the raw materials stored in the feeding box into the reaction vessel, thereby optimizing the material transmission efficiency and improving the subsequent reaction effects.

[0005] In order to solve the above technical problems, the utility model provides a homogenized anhydride feeding device, comprising a feeding box, a feeding port provided on the feeding box, a filtering mechanism, an anti-coagulation mechanism and a conveying mechanism provided on the feeding box;

[0006] The filtering mechanism includes several fixed blocks arranged in the feed box, a filter screen is fixedly provided on the fixed block, and a discharge module for discharging debris is provided at the tail end of the filter screen; the anti-solidification mechanism includes a mounting plate arranged on the side wall of the feed box and an air guide pipe arranged at the bottom of the feed box, a high-pressure air pump is fixedly provided on the mounting plate, an exhaust pipe is connected to the input end of the high-pressure air pump, and an output end of the high-pressure air pump is connected to the air guide pipe through an air delivery pipe; the conveying mechanism includes a vacuum material box arranged on the feed box, a vacuum pump is fixedly provided on the top of the vacuum material box, a vacuum pipe is connected to the input end of the vacuum pump, and a delivery pipe is connected to the side wall of the vacuum material box.

[0007] By combining the filtering mechanism, the anti-coagulation mechanism and the conveying mechanism, the processing efficiency and quality of the anhydride raw material are improved, and the effect on subsequent products is enhanced.

[0008] The filter screen is connected to the top surface of the fixed block through a damper, and the bottom surface of the filter screen is connected to a vibrator. The discharge module includes a guide groove arranged on the inner wall of the feed box, and a debris groove is slidingly provided in the guide groove. The tail end of the debris groove is connected to a sealing plate, and a handle is fixed on the sealing plate.

[0009] By setting a discharging module at the tail end of the filter screen, it is convenient for operators to regularly clean up the screened debris to ensure that the purity of the anhydride material can be improved.

[0010] The air guide pipe is connected with a plurality of air injection holes, and the top end of the air extraction pipe is connected with a filter box for purifying the air.

[0011] The high-pressure gas delivered by the high-pressure air pump is output to the feed box through the jet hole. The bubble effect is used to cause the material to surge, preventing it from solidifying in a low temperature or humid environment. The filter box connected to the top of the exhaust pipe ensures that the air entering the system is clean and pollution-free, further improving the quality of the material.

[0012] The bottom of the vacuum material box is connected with a discharge port, the bottom of the discharge port is connected with a guide plate, the tail end of the feeding pipe passes through the side wall of the feeding box and is arranged in the feeding box, and the top end of the feeding pipe passes through the side wall of the vacuum material box and is arranged in the vacuum material box.

[0013] The vacuum pump draws air from the vacuum material box to form a negative pressure environment, so that the material is sucked from the feed box into the vacuum material box, thereby achieving efficient and stable material transportation. The bottom of the vacuum material box is connected with a discharge port, and the bottom of the discharge port is connected with a guide plate to facilitate the control of the material outflow direction and ensure accurate material transportation.

[0014] In summary, compared with the prior art, this application has at least one of the following beneficial technical effects:

[0015] 1. The filtering mechanism and anti-solidification mechanism avoid downtime caused by material blockage or solidification, achieve continuous operation, and improve production efficiency. At the same time, the conveying mechanism using vacuum conveying technology reduces material loss during the conveying process and reduces production costs.

[0016] 2. The high-pressure air pump in the anti-solidification mechanism is used to increase air and introduce it into the raw materials, causing the raw materials to surge in the feed box, ensuring that the raw materials do not solidify, thereby reducing subsequent production efficiency.

[0017] 3. The vacuum pump creates a negative pressure environment by extracting air from the vacuum material box, so that the material is sucked into the vacuum material box from the feed box, thereby achieving efficient and stable material transportation. The discharge port and guide plate set at the bottom of the vacuum material box facilitate the control of the material outflow direction to ensure accurate material transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the anhydride feeding device of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the support cylinder rotatably arranged in the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the descaling spring provided with a descaling scraper and a spacer block;

[0021] Figure 4 The utility model is a structural schematic diagram of a descaling scraper and a spacer block.

[0022] Explanation of the accompanying drawings: 1. Feed box; 11. Feeding port; 2. Filter mechanism; 21. Fixed block; 22. Filter screen; 23. Damper; 24. Vibrator; 25. Discharging module; 251. Guide groove; 252. Debris trough; 253. Sealing plate; 254. Handle; 3. Anti-solidification mechanism; 31. Air guide pipe; 32. Mounting plate; 33. High-pressure air pump; 34. Exhaust pipe; 35. Air supply pipe; 36. Filter box; 37. Jet hole; 4. Conveying mechanism; 41. Vacuum material box; 42. Vacuum pump; 43. Vacuum pipeline; 44. Feed pipe; 45. Discharging port; 46. Guide plate. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiment of the present invention clearer, the following will be combined with the appended drawings of the embodiment of the present invention. Figure 1-4 , clearly and completely describing the technical solutions of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of the present invention.

[0024] like Figure 1-4As shown: This embodiment provides an anhydride feeding device, including a feeding box 1, a feeding port 11 is provided on the feeding box 1, a filtering mechanism 2, an anti-coagulation mechanism 3 and a conveying mechanism 4 are provided on the feeding box 1; the filtering mechanism 2 includes a plurality of fixed blocks 21 arranged in the feeding box 1, the fixed blocks 21 are fixed on the inner wall of the feeding box 1 by welding, a filter screen 22 is fixed on the fixed block 21, and a discharge module 25 for guiding out debris is provided at the tail end of the filter screen 22; the anti-coagulation mechanism 3 includes a mounting plate 32 arranged on the side wall of the feeding box 1 and an air guide pipe 31 arranged at the bottom of the feeding box 1, the mounting plate 32 is fixed on the outer wall of the feeding box 1 by bolts, a high-pressure air pump 33 is fixed on the mounting plate 32, and the input end of the high-pressure air pump 33 An exhaust pipe 34 is connected, and the output end of the high-pressure air pump 33 is connected to the air guide pipe 31 through an air supply pipe 35; the exhaust pipe 34 and the air supply pipe 35 are connected to each other with sealing pads to prevent gas leakage to the outside; the conveying mechanism 4 includes a vacuum material box 41 arranged on the feed box 1, and a vacuum pump 42 is fixed on the top of the vacuum material box 41, and the input end of the vacuum pump 42 is connected to a vacuum pipe 43, and the tail end of the vacuum pipe 43 is connected to a diffuser for extracting air from the vacuum material box 41, and a valve is connected to the vacuum pipe 43 for controlling the flow of air in the vacuum material box 41, and a delivery pipe 44 is connected to the side wall of the vacuum material box 41, and the delivery pipe 44 is used to extract raw materials for movement.

[0025] The filter screen 22 is connected to the top surface of the fixed block 21 through the damper 23, and the bottom surface of the filter screen 22 is connected to the vibrator 24. The filter screen 22 is set up in the feed box 1 through the damper 23, and the vibration generated by the vibrator 24 is used to pass kinetic energy to the filter screen 22 to effectively screen out impurities in the raw materials.

[0026] The discharge module 25 includes a guide groove 251 arranged on the inner side wall of the feed box 1, and a debris groove 252 is slidingly provided in the guide groove 251. The tail end of the debris groove 252 is connected with a sealing plate 253, and a handle 254 is fixed on the sealing plate 253. The debris groove 252 is slidingly set in the guide groove 251 through a guide rail, and the handle 254 is convenient for the operator to pull out the debris groove 252, so as to facilitate the processing of debris.

[0027] The air guide pipe 31 is connected to a plurality of air jet holes 37, and the top end of the air exhaust pipe 34 is connected to a filter box 36 for purifying the air. The external air is filtered by the filter box 36, transported by the high-pressure air pump 33, and ejected through the air jet holes 37, so that the raw materials in the feed box 1 are swirled to prevent the raw materials from solidifying.

[0028] The bottom of the vacuum material box 41 is connected to a discharge port 45, and the bottom of the discharge port 45 is connected to a guide plate 46. The tail end of the feeding pipe 44 passes through the side wall of the feeding box 1 and is arranged in the feeding box 1. The top end of the feeding pipe 44 passes through the side wall of the vacuum material box 41 and is arranged in the vacuum material box 41.

[0029] The method of using the present invention is as follows: when feeding the raw materials, the feed port 11 is opened, and the anhydride raw materials are added into the feed box 1 through the feed port 11, and then the vibrator 24 at the bottom of the filter screen 22 is turned on to make the filter screen 22 vibrate to move the impurities in the raw materials toward the discharge module 25, and the raw materials fall into the bottom of the feed box 1 through the gap of the filter screen 22, and then the high-pressure air pump 33 installed on the side wall of the feed box 1 is turned on to extract the gas filtered by the filter box 36 and pass through the gas pipe 3 The raw material is fed into the air duct 31 at the bottom of the feed box 1. High-pressure gas is then evenly released through several air jets 37 provided on the air duct 31 to prevent the homogenized anhydride raw material from solidifying in low-temperature or humid environments. The conveying mechanism 4 is activated, and a vacuum pump 42 extracts air from the vacuum material box 41, creating a negative pressure environment. This allows the homogenized anhydride raw material to be drawn from the feed box 1 into the vacuum material box 41 through the conveying pipe 44. When the material in the vacuum material box 41 reaches a certain level, it can be discharged through the discharge port 45 at the bottom. A guide plate 46 at the bottom of the discharge port 45 adjusts the direction of material outflow, ensuring accurate delivery of the material to the designated location.

[0030] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A homogenized anhydride feeding device, comprising a feeding box (1), wherein the feeding box (1) is provided with a feeding port (11), characterized in that: The feed box (1) is provided with a filtering mechanism (2), an anti-solidification mechanism (3) and a conveying mechanism (4); The filtering mechanism (2) comprises a plurality of fixed blocks (21) arranged in the feed box (1), a filter screen (22) is fixedly provided on the fixed block (21), and a discharge module (25) for discharging debris is provided at the tail end of the filter screen (22); the anti-solidification mechanism (3) comprises a mounting plate (32) arranged on the side wall of the feed box (1) and an air guide pipe (31) arranged at the bottom of the feed box (1), a high-pressure air pump (33) is fixedly provided on the mounting plate (32), and the high-pressure air pump (33) is provided at the bottom of the feed box (1). The input end of the pump (33) is connected to an air extraction pipe (34), and the output end of the high-pressure air pump (33) is connected to the air guide pipe (31) through an air delivery pipe (35); the conveying mechanism (4) includes a vacuum material box (41) arranged on the feed box (1), a vacuum pump (42) is fixed on the top of the vacuum material box (41), the input end of the vacuum pump (42) is connected to a vacuum pipe (43), and a delivery pipe (44) is connected to the side wall of the vacuum material box (41).

2. The homogenized anhydride feeding device according to claim 1, wherein: The filter screen (22) is connected to the top surface of the fixed block (21) via a damper (23), and a vibration exciter (24) is connected to the bottom surface of the filter screen (22).

3. The homogenized anhydride feeding device according to claim 1, wherein: The discharging module (25) comprises a guide groove (251) arranged on the inner side wall of the feeding box (1), a debris groove (252) is slidably provided in the guide groove (251), a sealing plate (253) is connected to the tail end of the debris groove (252), and a handle (254) is fixed on the sealing plate (253).

4. The homogenized anhydride feeding device according to claim 1, wherein: The air guide pipe (31) is connected to a plurality of air injection holes (37).

5. The homogenized anhydride feeding device according to claim 1, wherein: The top end of the air extraction pipe (34) is connected to a filter box (36) for purifying air.

6. The homogenized anhydride feeding device according to claim 1, wherein: The bottom of the vacuum material box (41) is connected to a discharge port (45), and the bottom of the discharge port (45) is connected to a guide plate (46).

7. The homogenized anhydride feeding device according to claim 1, wherein: The tail end of the conveying pipe (44) passes through the side wall of the supply box (1) and is arranged in the supply box (1), and the top end of the conveying pipe (44) passes through the side wall of the vacuum material box (41) and is arranged in the vacuum material box (41).

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