Microwave vacuum drying equipment for o-nitroaniline

Abstract

The utility model discloses microwave vacuum drying equipment for ortho-nitroaniline, and belongs to the technical field of ortho-nitroaniline drying. The device comprises an outer machine shell, a feeding port is formed in one side of the outer machine shell, a sealing cover is movably hinged to one side of the feeding port, and a microwave generating device is fixedly arranged on the sealing cover; a crushing cylinder is rotationally arranged on the side, close to the feeding port, in the outer machine shell, the end, close to the feeding port, of the crushing cylinder is open, the other end of the crushing cylinder is blocked, screening holes are formed in the side wall of the crushing cylinder, the outer side of the crushing cylinder is slidably sleeved with a sealing cylinder, and the sealing cylinder is in sliding fit with the outer machine shell; a pushing mechanism used for pushing the sealing cylinder to move along the smashing cylinder is arranged on the outer machine shell. When the device is used, o-nitroaniline powder is heated through the microwave generating device, and the motor drives the crushing cylinder to rotate, so that the o-nitroaniline powder in the sealing cylinder can roll continuously, and the o-nitroaniline powder is uniformly heated.

Description

Technical Field

[0001] This utility model relates to the field of o-nitroaniline drying technology, and in particular to an o-nitroaniline microwave vacuum drying device. Background Technology

[0002] o-Nitroaniline drying refers to the process of drying o-nitroaniline, a chemical substance. o-Nitroaniline is an orange-red needle-like crystal with specific melting and boiling points. It is soluble in ethanol, ether, and chloroform, and slightly soluble in water.

[0003] During the drying process, specialized drying equipment, such as a fully automatic o-nitroaniline dryer, is usually used. This dryer removes moisture or solvents from the material by microwave heating to achieve the drying purpose. The drying temperature must be strictly controlled below 70°C to avoid the decomposition or explosion of o-nitroaniline due to high temperature.

[0004] The shortcomings of the above-mentioned existing technical solutions are that the heating efficiency is low at the position far from the output end of the microwave generator and high at the position close to the output end of the microwave generator, which makes the heating efficiency of o-nitroaniline different at different positions, and easily causes uneven drying effect. Utility Model Content

[0005] This invention provides a microwave vacuum drying device for o-nitroaniline, which can solve the problem in the prior art where the different distances between o-nitroaniline and the microwave generator during microwave drying cause different heating efficiencies of o-nitroaniline, easily resulting in uneven drying effects.

[0006] A microwave vacuum drying device for o-nitroaniline includes an outer casing with a feeding port on one side and a sealing cover hinged to the feeding port. A microwave generator is fixedly mounted on the sealing cover. A crushing cylinder is rotatably mounted inside the outer casing near the feeding port, with one end open and the other end sealed. The crushing cylinder has sieve holes on its side wall. A sealing cylinder is slidably fitted onto the outside of the crushing cylinder, and the sealing cylinder slides in conjunction with the outer casing. A pushing mechanism is provided on the outer casing to move the sealing cylinder along the crushing cylinder. A drive mechanism is provided on the outer casing to rotate the sealing cylinder. A negative pressure assembly is provided on the outer casing to extract air from inside the crushing cylinder. Multiple sets of grinding balls for crushing lumpy o-nitroaniline are placed inside the crushing cylinder.

[0007] As a further embodiment of this utility model: the pushing mechanism includes an electric telescopic rod fixedly mounted on the outer casing, a rotating ring is coaxially and fixedly connected to the outer side of the sealing cylinder, a limiting ring is rotatably sleeved around the outer side of the rotating ring, and the extension end of the electric telescopic rod is fixedly connected to the limiting ring.

[0008] As a further embodiment of this utility model: the driving mechanism includes a motor fixedly mounted on the outer casing, a drive wheel fixedly connected to the output end of the motor, a transmission port opened on the outer casing, a drive wheel coaxially fixedly connected to the side of the sealing cylinder at a position corresponding to the transmission port, and a transmission belt fitted on the drive wheel and the drive wheel.

[0009] As a further embodiment of this utility model: a support plate is fixedly installed inside the outer casing near the feeding port, the end of the crushing cylinder near the feeding port is rotatably connected to the support plate, a receiving chamber is provided inside the outer casing, the sieve holes on the crushing cylinder are all distributed above the receiving chamber, and the support plate is located between the receiving chamber and the transmission port.

[0010] As a further embodiment of this utility model: the receiving chamber is slidably fitted with a receiving box for receiving o-nitroaniline powder.

[0011] As a further embodiment of this utility model: the negative pressure assembly includes a negative pressure pipe connected to one side of the outer casing, a filter plate is installed on the negative pressure pipe, and a negative pressure device is connected to the other end of the negative pressure pipe.

[0012] As a further embodiment of this utility model: guide rods extending along the axis of the sealing cylinder are fixedly provided on both sides of the limiting ring, and each set of guide rods is slidably engaged with the outer casing.

[0013] As a further embodiment of this utility model: the feeding port is located at a position lower than the axis of the crushing cylinder, and the microwave generator is located at a position lower than the center of the sealing cover.

[0014] As a further embodiment of this utility model: the inner side of the limiting ring is provided with a ball bearing that cooperates with the rotating ring.

[0015] As a further embodiment of this invention, the grinding ball is made of ceramic material.

[0016] The beneficial effects of this utility model are:

[0017] 1. In use, this invention uses a negative pressure pipe to create a vacuum inside the grinding cylinder. A microwave generator heats the o-nitroaniline powder, and a motor drives the grinding cylinder to rotate, causing the o-nitroaniline powder inside the sealed cylinder to continuously tumble, ensuring uniform heating. The rolling of the sealed cylinder also drives the grinding balls to move continuously, thus crushing and breaking up the o-nitroaniline lumps, preventing the o-nitroaniline from clumping together and affecting the heating effect and the uniformity of subsequent doping.

[0018] 2. After drying, this invention allows the electric telescopic rod to extend and move the sealing cylinder, disengaging it from the crushing cylinder. This opens the sieve holes on the crushing cylinder, facilitating the fall of o-nitroaniline powder from inside the crushing cylinder. The movement of the limiting ring drives the guide rod along the outer casing, thus providing a straightening and limiting effect on the limiting ring. Starting the motor rotates the crushing cylinder, causing the o-nitroaniline powder to move relative to each other, accelerating the fall of the powder from inside the crushing cylinder into the receiving box, completing the material conveying operation. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a microwave vacuum drying device for o-nitroaniline provided by this utility model;

[0020] Figure 2 A schematic diagram of the structure of the sealing cylinder of the microwave vacuum drying equipment for o-nitroaniline provided by this utility model after it is pushed out;

[0021] Figure 3 This is a schematic diagram of the overall longitudinal section structure of a microwave vacuum drying device for o-nitroaniline provided by this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Outer casing; 101. Transmission port; 102. Receiving chamber; 103. Support plate; 2. Crushing cylinder; 3. Sealing cylinder; 4. Drive mechanism; 401. Motor; 402. Drive wheel; 403. Transmission belt; 404. Drive wheel; 5. Negative pressure pipeline; 6. Feeding port; 7. Sealing cover; 701. Microwave generator; 8. Pushing mechanism; 801. Electric telescopic rod; 802. Limiting ring; 803. Rotating ring; 9. Grinding ball; 10. Receiving box; 11. Guide rod. Detailed Implementation

[0024] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0025] like Figures 1 to 3 As shown in the figure, the microwave vacuum drying equipment for o-nitroaniline provided in this embodiment of the present invention includes an outer casing 1. A feeding port 6 is provided on one side of the outer casing 1, and a sealing cover 7 is movably hinged to one side of the feeding port 6. A microwave generator 701 is fixedly mounted on the sealing cover 7. In this embodiment, the microwave generator 701 can be a magnetron. A pulverizing cylinder 2 is rotatably mounted inside the outer casing 1 near the feeding port 6. The pulverizing cylinder 2 is open at one end near the feeding port 6 and sealed at the other end. Figure 3As shown, the side wall of the grinding cylinder 2 has sieve holes, the size of which is adapted to the size of the o-nitroaniline powder. A sealing cylinder 3 is slidably sleeved on the outside of the grinding cylinder 2, and the sealing cylinder 3 is slidably fitted with the outer casing 1. The outer casing 1 is provided with a pushing mechanism 8 for pushing the sealing cylinder 3 to move along the grinding cylinder 2. The pushing mechanism 8 includes an electric telescopic rod 801 fixedly mounted on the outer casing 1. A rotating ring 803 is coaxially and fixedly connected to the outside of the sealing cylinder 3. A limiting ring 802 is rotatably sleeved around the outside of the rotating ring 803. The extension end of the electric telescopic rod 801 is fixedly connected to the limiting ring 802. The electric telescopic rod 801 can push the limiting ring 802 to move, thereby pushing the rotating ring 803 to move, so that the rotating ring 803 drives the sealing cylinder 3 to move. The sealing cylinder 3 disengages from the grinding cylinder 2, so that the sieve holes on the grinding cylinder 2 are opened, thus facilitating the o-nitroaniline powder to fall from the inside of the grinding cylinder 2. The inner side of the limiting ring 802 is rotatably provided with a ball bearing that cooperates with the rotating ring 803. The ball bearing is used to maintain the position of the limiting ring 802 and the rotating ring 803.

[0026] Both sides of the limiting ring 802 are fixedly provided with guide rods 11 extending along the axis of the sealing cylinder 3. Each set of guide rods 11 is slidably engaged with the outer casing 1, so that each set of guide rods 11 can only move back and forth in a straight line. Figure 2 As shown. When the limiting ring 802 moves along the axis of the sealing cylinder 3, the guide rod 11 inside the outer casing 1 will be pulled out. The guide rod 11 plays a guiding and limiting role for the limiting ring 802.

[0027] The outer casing 1 is equipped with a drive mechanism 4 that rotates the sealing cylinder 3, such as... Figure 3 As shown, the drive mechanism 4 includes a motor 401 fixedly mounted on the outer casing 1. A drive wheel 402 is fixedly connected to the output end of the motor 401. A transmission port 101 is provided on the outer casing 1. A drive wheel 404 is coaxially fixedly connected to the side of the sealing cylinder 3 at a position corresponding to the transmission port 101. A transmission belt 403 is fitted onto the drive wheel 404 and the drive wheel 402. The motor 401 drives the drive wheel 402 to rotate, and the drive wheel 402 drives the drive wheel 404 to rotate via the transmission belt 403. The drive wheel 404 drives the crushing cylinder 2 to rotate, allowing the o-nitroaniline powder inside the sealing cylinder 3 to continuously tumble, ensuring uniform heating of the o-nitroaniline powder.

[0028] To ensure the stable rotation of the sealing cylinder 3, a support plate 103 is fixedly installed inside the outer casing 1 near the feeding port 6. The end of the crushing cylinder 2 near the feeding port 6 is rotatably connected to the support plate 103, which supports one end of the crushing cylinder 2, ensuring its stability during rotation. A receiving chamber 102 is provided inside the outer casing 1. The sieve holes on the crushing cylinder 2 are distributed above the receiving chamber 102. The support plate 103 is located between the receiving chamber 102 and the transmission port 101. A receiving box 10 for receiving o-nitroaniline powder is slidably fitted inside the receiving chamber 102. The support plate 103 prevents o-nitroaniline powder from flying out of the transmission port 101 and affecting the working environment. The end of the sealing cylinder 3 near the feed inlet 6 engages with the support plate 103. When the sealing cylinder 3 is fitted onto the outside of the crushing cylinder 2, the end of the sealing cylinder 3 directly abuts against the support plate 103, thus clamping the end of the sealing cylinder 3 between the outer casing 1, the crushing cylinder 2, and the support plate 103. A rubber layer can be coated on the inside of the sealing cylinder 3 to ensure the sealing effect of each set of sieve holes on the crushing cylinder 2.

[0029] During heating, moisture will be generated inside the sealed cylinder 3, which may float in the air. If this moisture is not removed in time, it may come into contact with the o-nitroaniline powder again, affecting the drying effect. A negative pressure component is provided on the outer casing 1 to extract air from the inside of the pulverizing cylinder 2. The negative pressure component includes a negative pressure pipe 5 connected to one side of the outer casing 1. The other end of the negative pressure pipe 5 is connected to a vacuum machine (or other negative pressure equipment, such as a negative pressure pump, which falls within the protection scope of this patent). A filter plate is installed at the output end of the negative pressure pipe 5 to prevent powder from being drawn into the negative pressure pipe 5. The negative pressure pipe 5 creates a vacuum state inside the pulverizing cylinder 2 and the sealed cylinder 3, thereby allowing moisture to be extracted from the pulverizing cylinder 2 and the sealed cylinder 3 in a timely manner.

[0030] When o-nitroaniline powder is exposed to moisture, it tends to clump together into relatively loose lumps. To ensure uniform mixing of subsequent materials and efficient reaction, the grinding cylinder 2 contains multiple sets of grinding balls 9 for crushing the lumps of o-nitroaniline. As the sealed cylinder 3 rotates, the grinding balls 9 move continuously, thus crushing and grinding the lumps of o-nitroaniline, preventing them from clumping together and affecting the heating effect and the uniformity of subsequent doping. The grinding balls 9 are preferably made of ceramic, as ceramic does not accumulate heat under microwave conditions, thus preventing the decomposition of the o-nitroaniline powder.

[0031] like Figure 1 As shown, the feeding port 6 is located below the axis of the crushing cylinder 2, and the microwave generator 701 is located below the center of the sealing cover 7, so that the output end of the microwave generator 701 can be close to the orthonitroaniline powder.

[0032] Working Principle: During operation, o-nitroaniline powder is fed into the grinding cylinder 2 through the feeding port 6. The sealing cover 7 is fixed to the feeding port 6, isolating the interior of the grinding cylinder 2 from the outside environment. The microwave generator 701 is activated to heat the o-nitroaniline powder. The motor 401 is started, driving the drive wheel 402 to rotate. The drive wheel 402, via the transmission belt 403, drives the drive wheel 404 to rotate, which in turn drives the grinding cylinder 2 to rotate. The grinding cylinder 2 then drives the sealing cylinder 3 to rotate, causing the o-nitroaniline powder inside the sealing cylinder 3 to continuously tumble, ensuring uniform heating. The rolling of the sealing cylinder 3 causes the grinding balls 9 to move continuously, thus crushing and grinding the o-nitroaniline lumps, preventing them from clumping together and affecting the heating effect and the uniformity of subsequent doping.

[0033] The water vapor inside the pulverizing cylinder 2 and the sealing cylinder 3 is extracted through the negative pressure pipe 5 to prevent the water vapor from coming into contact with the o-nitroaniline powder again and affecting the drying effect.

[0034] After drying, stop starting motor 401 and input gas into the grinding cylinder 2 to balance the internal air pressure with the external environment. Start the electric telescopic rod 801 to extend and move the limiting ring 802, which in turn moves the rotating ring 803. This causes the rotating ring 803 to move the sealing cylinder 3, disengaging it from the grinding cylinder 2. This opens the sieve holes on the grinding cylinder 2, allowing o-nitroaniline powder to fall from inside the grinding cylinder 2. The movement of the limiting ring 802 causes the guide rod 11 to move along the outer casing 1, thus providing a straightening and limiting effect on the limiting ring 802. Start motor 401, which rotates the grinding cylinder 2, causing the o-nitroaniline powder to move relative to each other and accelerating the speed at which the o-nitroaniline powder falls from inside the grinding cylinder 2 into the receiving box 10.

[0035] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A microwave vacuum drying apparatus for o-nitroaniline, comprising an outer casing (1), characterized in that, The outer shell (1) is provided with a feeding port (6) on one side, the feeding port (6) is movably hinged with a sealing cover (7) on one side, and the sealing cover (7) is fixedly provided with a microwave generating device (701); the outer shell (1) is rotatably provided with a crushing cylinder (2) near the feeding port (6) on one side, the crushing cylinder (2) is provided with an opening on one end near the feeding port (6) and is provided with a block on the other end, the side wall of the crushing cylinder (2) is provided with a sieve hole, the outer side of the crushing cylinder (2) is slidably sleeved with a sealing cylinder (3), the sealing cylinder (3) is slidably matched with the outer shell (1), the outer shell (1) is provided with a pushing mechanism (8) for pushing the sealing cylinder (3) to move along the crushing cylinder (2); the outer shell (1) is provided with a driving mechanism (4) for driving the sealing cylinder (3) to rotate, the outer shell (1) is provided with a negative pressure assembly for extracting air in the crushing cylinder (2), and a plurality of grinding balls (9) for crushing blocky o-nitroaniline are placed in the crushing cylinder (2).

2. A microwave vacuum drying apparatus for o-nitroaniline as claimed in claim 1, wherein, The pushing mechanism (8) comprises an electric telescopic rod (801) fixedly arranged on the outer shell (1), a rotating ring (803) coaxially fixedly connected outside the sealing cylinder (3), and a limiting ring (802) rotatably sleeved outside the rotating ring (803), and the extending end of the electric telescopic rod (801) is fixedly connected with the limiting ring (802).

3. A microwave vacuum drying apparatus for o-nitroaniline as claimed in claim 1, wherein, The driving mechanism (4) comprises a motor (401) fixedly arranged on the outer shell (1), a driving wheel (402) fixedly connected to the output end of the motor (401), a transmission port (101) formed in the outer shell (1), a driven wheel (404) coaxially fixedly connected to the position corresponding to the transmission port (101) on the side of the sealing cylinder (3), and a transmission belt (403) cooperatively arranged between the driving wheel (402) and the driven wheel (404).

4. A microwave vacuum drying apparatus for o-nitroaniline according to claim 2 or 3, characterized in that, The outer shell (1) is fixedly provided with a support plate (103) near the feeding port (6) on one side, one end of the crushing cylinder (2) near the feeding port (6) is rotatably connected with the support plate (103), the outer shell (1) is provided with a receiving cavity (102), the sieve holes on the crushing cylinder (2) are all distributed above the receiving cavity (102), and the support plate (103) is located between the receiving cavity (102) and the transmission port (101).

5. A o-nitroaniline microwave vacuum drying apparatus as claimed in claim 4, wherein, The receiving cavity (102) is slidably matched with a receiving box (10) for receiving o-nitroaniline powder.

6. A microwave vacuum drying apparatus for o-nitroaniline as claimed in claim 1, wherein, The negative pressure assembly comprises a negative pressure pipeline (5) connected with one side of the outer shell (1), a filter plate mounted on the negative pressure pipeline (5), and a negative pressure device connected to the other end of the negative pressure pipeline (5).

7. A microwave vacuum drying apparatus for o-nitroaniline as claimed in claim 2, wherein The limiting ring (802) is fixedly provided with a guide rod (11) extending along the axis direction of the sealing cylinder (3) on both sides, and each group of guide rods (11) is slidably matched with the outer shell (1).

8. A o-nitroaniline microwave vacuum drying apparatus as claimed in claim 1, wherein, The feeding port (6) is located below the axial center line of the crushing cylinder (2), and the microwave generating device (701) is located below the center of the sealing cover (7).

9. A microwave vacuum drying apparatus for o-nitroaniline as claimed in claim 2, wherein The limiting ring (802) is provided with a ball cooperating with the rotating ring (803) on the inner side.

10. A o-nitroaniline microwave vacuum drying apparatus as claimed in claim 1, wherein, The grinding ball (9) is made of ceramic material.

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