Automatic feeding device for paraformaldehyde powder

Abstract

The utility model discloses an automatic paraformaldehyde powder feeding device which comprises a reaction kettle, a condenser is fixedly installed at the top of the reaction kettle, a vacuum feeding assembly is fixedly installed at the top of the reaction kettle, a feeding pipe is installed at the feeding end of the vacuum feeding assembly, an annular sliding block is driven by a hydraulic rod to ascend and descend, and the annular sliding block is driven by a hydraulic rod to ascend and descend. At the moment, the height of a discharging pipe at the discharging end of the vacuum feeding assembly is increased and decreased, the injection height of paraformaldehyde powder can be changed, the paraformaldehyde powder is used for being matched with the liquid level height of added liquid methyl alcohol, a motor drives a gear to rotate forwards and backwards in a reciprocating mode, and an annular rack is meshed with the gear to drive a rotating ring to rotate; and the positioning rods on the moving plate slide in the positioning holes, so that the moving plate is driven to rotate, the discharging position of the discharging pipe is changed, paraformaldehyde powder is uniformly added on the surface of liquid methanol, and the mixing efficiency of the paraformaldehyde powder and the liquid methanol is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hemiacetal production, in particular to an automatic feeding device for paraformaldehyde powder. Background Art

[0002] Hemiacetal is a type of hydroxy ether compound with a hydroxyl group, an alkoxy group and a hydrogen on the same carbon, which is produced by a nucleophilic addition reaction of aldehyde and alcohol under the action of an acidic catalyst. When producing hemiacetal, polyformaldehyde powder and liquid methanol are added to a reactor for reaction. During the addition of polyformaldehyde powder, the polyformaldehyde powder is generally added through a vacuum feeder, but the discharge position in the vacuum feeder is generally fixed, so the position of the poured polyformaldehyde powder is fixed. Since the liquid surface of methanol has tension, the polyformaldehyde powder will aggregate when discharging, resulting in poor mixing effect of the polyformaldehyde powder and liquid methanol. Summary of the invention

[0003] The utility model aims to provide an automatic feeding device for paraformaldehyde powder to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic feeding device for polyformaldehyde powder, comprising a reactor, a condenser is fixedly installed on the top of the reactor, a vacuum feeding assembly is fixedly installed on the top of the reactor, a feeding pipe is installed at the feeding end of the vacuum feeding assembly, a discharging pipe is installed at the discharging end of the vacuum feeding assembly, the discharging pipe is connected to the interior of the reactor, a movable plate that can be raised and lowered and rotated is installed inside the reactor, the end of the discharging pipe is installed on the mounting hole on the movable plate, and the end of the discharging pipe is installed near the middle of the movable plate.

[0005] As a further preferred embodiment of the present technical solution, a fixed ring is fixedly installed inside the reactor, and a movable plate is rotatably and slidably installed inside the fixed ring. A hydraulic rod is fixedly installed on the top of the reactor, and the movable end of the hydraulic rod passes through the reactor and is movably connected to the movable plate for raising the movable plate.

[0006] As a further preferred embodiment of the present technical solution, a motor is fixedly installed on the outer side of the top of the reactor, a gear is fixedly installed on the output end of the motor passing through the reactor, a support ring is fixedly installed on the inner wall of the top of the fixed ring, a swivel is rotatably installed between the support ring and the inner wall of the top of the fixed ring, an annular rack is fixedly installed on the upper surface of the swivel, and the annular rack is meshingly connected with the gear.

[0007] As a further preferred embodiment of the present technical solution, the upper surface of the movable plate is fixedly mounted with positioning rods in a ring array with the central axis of the movable plate as the axis, and the rotating ring is provided with positioning holes at positions corresponding to the positioning rods, and the positioning holes are slidably connected to the positioning rods.

[0008] As a further preferred embodiment of the present technical solution, the movable end of the hydraulic rod passes through the reactor and is fixedly provided with an annular slider, and an annular groove is provided on the movable plate corresponding to the rotation track of the annular slider, and the annular groove is rotatably connected to the annular slider.

[0009] As a further preferred embodiment of the present technical solution, a coil cooling component and a steam heating component are installed at the bottom jacket of the reactor.

[0010] The utility model provides an automatic feeding device for paraformaldehyde powder, which has the following beneficial effects:

[0011] (1) The utility model drives the annular slider to rise and fall by means of a hydraulic rod. Since the annular slider rotates inside the annular slide groove, it will drive the movable plate to rise and fall. At this time, the height of the discharge pipe at the discharge end of the vacuum feeding component will rise and fall, and the injection height of the polyformaldehyde powder can be changed to adapt to the liquid level height of the added liquid methanol.

[0012] (2) The utility model drives the gear to rotate back and forth in both directions through a motor, and the meshing of the annular rack and the gear drives the rotating ring to rotate. Since the positioning rod on the movable plate slides inside the positioning hole, the movable plate is driven to rotate, thereby changing the position of the discharge pipe, and then the polyformaldehyde powder is evenly added to the surface of the liquid methanol, thereby improving the mixing efficiency between the polyformaldehyde powder and the liquid methanol. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is one of the partial structural schematic diagrams of the utility model;

[0015] Figure 3 This is the second schematic diagram of the partial structure of the utility model;

[0016] Figure 4 It is a schematic diagram of the partial explosion structure of the utility model;

[0017] In the figure: 1. Reactor; 2. Condenser; 3. Vacuum feeding assembly; 4. Feed pipe; 5. Discharge pipe; 6. Moving plate; 7. Fixed ring; 8. Hydraulic rod; 9. Motor; 10. Gear; 11. Support ring; 12. Rotating ring; 13. Annular rack; 14. Positioning rod; 15. Positioning hole; 16. Annular slider; 17. Annular slide groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] The utility model provides a technical solution: Figures 1 to 4 As shown, in this embodiment, an automatic feeding device for polyformaldehyde powder includes a reactor 1, a condenser 2 is fixedly installed on the top of the reactor 1, a vacuum feeding assembly 3 is fixedly installed on the top of the reactor 1, a feeding pipe 4 is installed at the feeding end of the vacuum feeding assembly 3, a discharging pipe 5 is installed at the discharging end of the vacuum feeding assembly 3, the discharging pipe 5 is connected to the interior of the reactor 1, a movable plate 6 that can be raised and lowered and rotated is installed inside the reactor 1, the end of the discharging pipe 5 is installed on the mounting hole on the movable plate 6, and the end of the discharging pipe 5 is installed near the middle of the movable plate 6.

[0020] like Figures 1 to 4 As shown, a fixing ring 7 is fixedly installed inside the reactor 1, and a movable plate 6 is rotatably and slidably installed inside the fixing ring 7. A hydraulic rod 8 is fixedly installed on the top of the reactor 1. The movable end of the hydraulic rod 8 passes through the reactor 1 and is movably connected with the movable plate 6 for raising the movable plate 6.

[0021] The movable plate 6 is driven up and down by the hydraulic rod 8, and the height of the discharge pipe 5 at the discharge end of the vacuum feeding assembly 3 is raised and lowered, so that the injection height of the polyformaldehyde powder can be changed to adapt to the liquid level of the added liquid methanol.

[0022] like Figures 1 to 4 As shown, a motor 9 is fixedly installed on the outer side of the top of the reactor 1, and a gear 10 is fixedly installed on the output end of the motor 9 through the reactor 1. A support ring 11 is fixedly installed on the inner wall of the top of the fixed ring 7, and a swivel 12 is rotatably installed between the support ring 11 and the inner wall of the top of the fixed ring 7. An annular rack 13 is fixedly installed on the upper surface of the swivel 12, and the annular rack 13 is meshingly connected with the gear 10.

[0023] The motor 9 drives the gear 10 to rotate back and forth in both positive and negative directions, and the engagement of the annular rack 13 with the gear 10 drives the rotating ring 12 to rotate.

[0024] like Figures 1 to 4 As shown, the upper surface of the movable plate 6 is fixedly mounted with positioning rods 14 in a ring array with the central axis of the movable plate 6 as the axis, and the rotating ring 12 is provided with positioning holes 15 corresponding to the positions of the positioning rods 14, and the positioning holes 15 are slidably connected to the positioning rods 14.

[0025] During the rotation of the rotating ring 12 , since the positioning rod 14 on the moving plate 6 slides inside the positioning hole 15 , the moving plate 6 is driven to rotate, thereby changing the position of the material discharge at the discharge pipe 5 .

[0026] like Figures 1 to 4 As shown, the movable end of the hydraulic rod 8 passes through the reactor 1 and is fixedly mounted with an annular slider 16 . The movable plate 6 is provided with an annular groove 17 at the rotation track corresponding to the annular slider 16 . The annular groove 17 is rotatably connected to the annular slider 16 .

[0027] The annular slider 16 is driven to rise and fall by the hydraulic rod 8. Since the annular slider 16 rotates inside the annular groove 17, it will drive the movable plate 6 to rise and fall. At the same time, when the movable plate 6 rotates, the annular slider 16 will also slide relatively inside the annular groove 17, and will not block the rotation of the discharge pipe 5.

[0028] like Figures 1 to 4 As shown, a coil cooling component and a steam heating component are installed at the bottom jacket of the reactor 1.

[0029] The mixed materials can be cooled and heated.

[0030] The utility model provides an automatic feeding device for paraformaldehyde powder, and the specific working principle is as follows:

[0031] When the device is in use, the paraformaldehyde powder is fed through the vacuum feeding component 3 and discharged at the discharge pipe 5. The paraformaldehyde powder is added to the stirring kettle, and the same mass of liquid methanol is added to the reactor 1. The stirring blades on the reactor 1 stir the mixed materials, and the reaction temperature is raised to 85 to 90 degrees Celsius through the steam heating component at the jacket. The mixed materials are heated by steam, and the hot material steam will be liquefied and refluxed through the condenser 2, and react evenly. The unreacted gas is discharged through the exhaust pipe. After the materials are fully added and mixed for four hours, the product is cooled to 40 degrees Celsius through the coil cooling component installed at the jacket. The final mixed hemiacetal solution is used downstream;

[0032] When adding polyformaldehyde powder, the annular slider 16 can be driven to rise and fall by the hydraulic rod 8. Since the annular slider 16 rotates inside the annular chute 17, it will drive the movable plate 6 to rise and fall. At this time, the height of the discharge pipe 5 at the discharge end of the vacuum feeding component 3 will rise and fall, and the injection height of the polyformaldehyde powder can be changed to adapt to the liquid level of the added liquid methanol. During the addition of the polyformaldehyde powder, the motor 9 drives the gear 10 to rotate back and forth in both directions, and the engagement of the annular rack 13 and the gear 10 will drive the swivel 12 to rotate. Since the positioning rod 14 on the movable plate 6 slides inside the positioning hole 15, it will drive the movable plate 6 to rotate, thereby changing the discharge position at the discharge pipe 5, and then adding the polyformaldehyde powder to the surface of the liquid methanol, thereby improving the mixing efficiency between the polyformaldehyde powder and the liquid methanol.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic feeding device for paraformaldehyde powder, comprising a reaction kettle (1), a condenser (2) fixedly mounted on the top of the reaction kettle (1), a vacuum feeding assembly (3) fixedly mounted on the top of the reaction kettle (1), a feeding pipe (4) mounted on the feeding end of the vacuum feeding assembly (3), a discharging pipe (5) mounted on the discharging end of the vacuum feeding assembly (3), the discharging pipe (5) being connected to the interior of the reaction kettle (1), characterized in that: A movable plate (6) that can be raised and lowered and rotated is installed inside the reactor (1), and the end of the discharge pipe (5) is installed on a mounting hole on the movable plate (6), and the end of the discharge pipe (5) is installed near the middle of the movable plate (6).

2. The automatic feeding device for paraformaldehyde powder according to claim 1, characterized in that: A fixed ring (7) is fixedly installed inside the reactor (1), and the movable plate (6) is rotatably and slidably installed inside the fixed ring (7). A hydraulic rod (8) is fixedly installed on the top of the reactor (1), and the movable end of the hydraulic rod (8) passes through the reactor (1) and is movably connected to the movable plate (6) for raising the movable plate (6).

3. The automatic feeding device for paraformaldehyde powder according to claim 2, characterized in that: A motor (9) is fixedly mounted on the outer side of the top end of the reactor (1); a gear (10) is fixedly mounted on the output end of the motor (9) passing through the reactor (1); a support ring (11) is fixedly mounted on the inner wall of the top end of the fixed ring (7); a rotating ring (12) is rotatably mounted between the support ring (11) and the inner wall of the top end of the fixed ring (7); an annular rack (13) is fixedly mounted on the upper surface of the rotating ring (12); and the annular rack (13) is meshingly connected with the gear (10).

4. The automatic feeding device for paraformaldehyde powder according to claim 3, characterized in that: Positioning rods (14) are fixedly mounted on the upper surface of the movable plate (6) in a circular array with the central axis of the movable plate (6) as the axis, and positioning holes (15) are opened in the rotating ring (12) at positions corresponding to the positioning rods (14), and the positioning holes (15) are slidably connected to the positioning rods (14).

5. The automatic feeding device for paraformaldehyde powder according to claim 2, characterized in that: The movable end of the hydraulic rod (8) passes through the reactor (1) and is fixedly mounted with an annular slider (16); the movable plate (6) is provided with an annular slide groove (17) at a position corresponding to the rotation track of the annular slider (16); the annular slide groove (17) is rotatably connected to the annular slider (16).

6. The automatic feeding device for paraformaldehyde powder according to claim 5, characterized in that: A coil cooling component and a steam heating component are installed on the bottom jacket of the reactor (1).

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