Automatic powder feeding equipment

Abstract

The utility model discloses automatic powder feeding equipment which comprises an automatic bale breaker and a powder temporary storage tank, and the bottom of the automatic bale breaker is connected with the powder temporary storage tank through a first conveyor. The powder temporary storage tank is connected with a weighing module, the top of the powder temporary storage tank is sequentially connected with a dust remover and a first back flushing device, and the bottom of the powder temporary storage tank is connected with a second conveyor; the device further comprises a third conveyor capable of conveying in the forward / reverse direction, the output end of the second conveyor is connected with the middle of the third conveyor, and one side of the third conveyor is connected with at least two reaction kettles. The automatic powder feeding equipment provided by the utility model cannot be in contact with air during feeding, is high in safety, can prevent a feeding system from being blocked, and also can ensure the accuracy of polyformaldehyde feeding.

Description

Technical Field

[0001] The utility model relates to the field of paraformaldehyde powder feeding, in particular to automatic powder feeding equipment. Background Art

[0002] The UV monomer CTFA (trimethylolpropane methylal acrylate) is a condensation reaction between trimethylolpropane and polyformaldehyde to produce the intermediate trimethylolpropane methylal, which is then esterified with acrylic acid to produce the product trimethylolpropane accelerated safe acrylate (CTFA monomer). It is mainly used as a UV curing diluent for inkjet and inks. The problem is that polyformaldehyde is a carcinogenic powder (it can release formaldehyde), and the reaction process involves high-temperature feeding, which is very harmful to the human body. The direct feeding process involves the evaporation of powder and solvent into air, forming explosive dust and explosive gas, which poses a significant safety hazard. Utility Model Content

[0003] The utility model aims to provide an automatic powder feeding device which does not contact the air during feeding, has high safety, can avoid clogging of the feeding system, and can ensure the accuracy of polyformaldehyde feeding.

[0004] To achieve the above-mentioned objectives, the utility model provides an automatic powder feeding device, comprising an automatic unpacking machine and a powder temporary storage tank, wherein the bottom of the automatic unpacking machine is connected to the powder temporary storage tank via a first conveyor; the powder temporary storage tank is connected to a weighing module, the top of the powder temporary storage tank is sequentially connected to a dust collector and a first back-blowing device, and the bottom of the powder temporary storage tank is connected to a second conveyor; the device also comprises a third conveyor capable of forward / reverse conveying, the output end of the second conveyor is connected to the middle of the third conveyor, and at least two reactors are connected to one side of the third conveyor.

[0005] As a further improvement of the present invention, it also includes a ton bag conveying mechanism, which includes a track, a trolley that matches the track is provided on the track, and a crane is provided on the trolley; the track is located above the automatic unpacking machine.

[0006] As a further improvement of the present invention, the first backflush device includes a first nitrogen pipeline, which is provided with a first stop valve, a first check valve, and a first ball valve arranged in sequence along the flow direction of the nitrogen; the dust collector is a strip bag-type dust collector, and a bag filter rod is provided inside the shell of the dust collector; the air inlet of the bag filter rod is connected to the top of the powder temporary storage tank, and the shell of the dust collector is also provided with an exhaust port and a backflush port, and the backflush port of the dust collector is connected to the air outlet of the first nitrogen pipeline.

[0007] As a further improvement of the present invention, the powder temporary storage tank includes an inverted cone located at the lower part thereof, and the inverted cone is connected to a second backflush device.

[0008] As a further improvement of the present invention, the second backflush device includes a second nitrogen pipeline, on which a second shut-off valve, a second check valve, and a second ball valve are connected in sequence along the gas flow direction, and the gas outlet end of the second nitrogen pipeline is connected to the lower part of the inverted cone.

[0009] As a further improvement of the present invention, the lower end of the inverted cone is connected to the second conveyor through a first pneumatic ball valve.

[0010] As a further improvement of the present invention, a second pneumatic ball valve is connected between each of the reactors and the third conveyor.

[0011] As a further improvement of the present invention, the first conveyor, the second conveyor and the third conveyor are all screw conveyors.

[0012] Beneficial effects

[0013] Compared with the existing technology, the advantages of the powder automatic feeding equipment of the present invention are:

[0014] 1. After the ton bag containing paraformaldehyde is hoisted onto the automatic bag opener via a crane, the bag is opened and the poured paraformaldehyde is transferred to the powder storage tank via the first conveyor. The entire process of feeding the powder into the temporary storage tank does not require manual bag opening or material contact, preventing human contact with the paraformaldehyde and its released formaldehyde, thereby improving safety. A dust collector is installed on the powder storage tank to prevent dust leakage, and a first backflush device is designed on top of the dust collector to prevent clogging. The transfer of paraformaldehyde from the powder storage tank to the reactor is completed in a closed environment, without contact with the outside air, enhancing safety.

[0015] 2. Ensure the accuracy of polyformaldehyde feeding by setting up a weighing module.

[0016] 3. The inverted cone of the powder storage tank facilitates the automatic outflow of paraformaldehyde. In addition, with the second backflush device, nitrogen is blown into the inverted cone to break the material bridge when it cannot flow out.

[0017] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the automatic powder feeding equipment;

[0020] Figure 2 It is a structural schematic diagram of the dust collector and the first back-flushing device. DETAILED DESCRIPTION

[0021] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0022] Example

[0023] The specific implementation of the utility model is as follows Figure 1 and Figure 2 As shown, an automatic powder feeding device includes an automatic bag unpacker 2 and a powder temporary storage tank 4. The bottom of the automatic bag unpacker 2 is connected to the powder temporary storage tank 4 via a first conveyor 3. The top of the powder temporary storage tank 4 is connected in sequence to a dust collector 6 and a first backflush device 7. The bottom of the powder temporary storage tank 4 is connected to a second conveyor 9. The automatic powder feeding device also includes a third conveyor 10 capable of forward and reverse conveying. The output end of the second conveyor 9 is connected to the middle of the third conveyor 10. At least two reactors 15 are connected to one side of the third conveyor 10. The automatic bag unpacker 2 here is a traditional automatic bag unpacker.

[0024] A second pneumatic ball valve 14 is connected between each reactor 15 and the third conveyor 10 . The first conveyor 3 , the second conveyor 9 and the third conveyor 10 are all screw conveyors.

[0025] In this embodiment, there are four reactors 15, namely, reactor A, reactor B, reactor C, and reactor D. These reactors A, B, C, and D are arranged in sequence along the length of the third conveyor 10. When the motor of the third conveyor 10 rotates forward, the paraformaldehyde powder in the third conveyor 10 enters reactors C and D. When the motor of the third conveyor 10 rotates reversely, the paraformaldehyde powder in the third conveyor 10 enters reactors A and B.

[0026] The powder storage tank 4 is connected to a weighing module 5. Specifically, the bottom of the powder storage tank 4 is provided with multiple support legs 43, and the weighing module 5 is installed between the support legs 43 and the ground. When the paraformaldehyde powder enters or exits the powder storage tank 4, the change in the value on the weighing module 5 is used to determine the change in the powder's weight.

[0027] The automatic powder feeding equipment also includes a ton bag conveying mechanism 1, which includes a horizontally arranged track 11. A trolley 12 is provided on the track 11 and is adapted to move along the track 11 under the action of a drive mechanism. A crane 13 is provided on the trolley 12. The track 11 is located above the automatic bag unpacking machine 2.

[0028] The ton bag 16 filled with paraformaldehyde is pushed to the designated location, and the ton bag 16 is hoisted into the automatic unpacking machine 2 by the crane 13 on the upper guide rail 11. The bottom of the automatic unpacking machine 2 is connected to the first conveyor 3, and the paraformaldehyde is transported to the container with a capacity of 10m 3 The powder temporary storage tank 4 is temporarily stored, and there is no need to manually unpack the bags or contact the materials during the whole process of feeding the materials into the powder temporary storage tank 4.

[0029] The first backflush device 7 includes a first nitrogen pipeline 71, which is provided with a first stop valve 74, a first check valve 73, and a first ball valve 72 arranged in sequence along the direction of nitrogen flow. The dust collector 6 is a strip-shaped bag-type dust collector, which mainly prevents dust from overflowing through the principle of filtration. A bag filter rod 61 is provided inside the shell of the dust collector 6. The air inlet of the bag filter rod 61 is connected to the top of the powder temporary storage tank 4. The shell of the dust collector 6 is also provided with an exhaust port 62 and a backflush port. The backflush port of the dust collector 6 is connected to the air outlet of the first nitrogen pipeline 71. When the pressure in the tank increases, the first backflush device 7 blows nitrogen back into the dust collector 6 to prevent the bag filter rod 61 in the dust collector 6 from being blocked by dust, restore the pressure, and allow the dust collector 6 to continue working for a long time.

[0030] The powder temporary storage tank 4 includes an inverted cone 41 located at its lower part. The lower end of the inverted cone 41 is connected to the second conveyor 9 through a first pneumatic ball valve 42. The provision of the inverted cone 41 is conducive to the automatic outflow of paraformaldehyde. The inverted cone 41 is connected to a second back-blowing device 8. The second back-blowing device 8 includes a second nitrogen pipeline 81. The second stop valve 84, the second check valve 83, and the second ball valve 82 are sequentially connected along the gas flow direction of the second nitrogen pipeline 81. The gas outlet end of the second nitrogen pipeline 81 is connected to the lower part of the inverted cone 41. In conjunction with the second back-blowing device 8, nitrogen is blown into the inverted cone. When the material bridges and cannot flow out, it can be broken by back-blowing, ensuring that the paraformaldehyde powder can smoothly enter the second conveyor 9.

[0031] The entire system is designed with an automatic control system. On the control panel, click on the reactor that needs to be added, enter the addition weight, and select the addition speed. The specified weight of paraformaldehyde powder material can be automatically added to the specified reactor at the specified addition speed.

[0032] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A powder automatic feeding device, characterized in that: The invention comprises an automatic unpacking machine (2) and a powder temporary storage tank (4), wherein the bottom of the automatic unpacking machine (2) and the powder temporary storage tank (4) are connected via a first conveyor (3); the powder temporary storage tank (4) is connected to a weighing module (5); the top of the powder temporary storage tank (4) is sequentially connected to a dust collector (6) and a first back-blowing device (7); the bottom of the powder temporary storage tank (4) is connected to a second conveyor (9); and the invention also comprises a third conveyor (10) capable of forward / reverse conveying, wherein the output end of the second conveyor (9) is connected to the middle of the third conveyor (10), and one side of the third conveyor (10) is connected to at least two reactors (15).

2. The automatic powder feeding equipment according to claim 1, characterized in that: The invention also includes a ton bag conveying mechanism (1), which includes a track (11), a trolley (12) matched with the track (11), and a crane (13) on the trolley (12); the track (11) is located above the automatic unpacking machine (2).

3. The automatic powder feeding equipment according to claim 1, characterized in that: The first backflush device (7) comprises a first nitrogen pipeline (71), on which a first stop valve (74), a first check valve (73), and a first ball valve (72) are arranged in sequence along the flow direction of the nitrogen; the dust collector (6) is a strip-shaped bag-type dust collector, and a bag filter rod (61) is provided inside the shell of the dust collector (6); the air inlet of the bag filter rod (61) is communicated with the top of the powder temporary storage tank (4), and the shell of the dust collector (6) is also provided with an exhaust port (62) and a backflush port, and the backflush port of the dust collector (6) is communicated with the air outlet of the first nitrogen pipeline (71).

4. The automatic powder feeding equipment according to claim 1, characterized in that: The powder temporary storage tank (4) comprises an inverted cone (41) located at the lower portion thereof, and the inverted cone (41) is connected to a second back-flushing device (8).

5. The automatic powder feeding equipment according to claim 4, characterized in that: The second backflush device (8) comprises a second nitrogen pipeline (81), and a second stop valve (84), a second check valve (83), and a second ball valve (82) are sequentially connected to the second nitrogen pipeline (81) along the gas flow direction. The gas outlet end of the second nitrogen pipeline (81) is communicated with the lower part of the inverted cone (41).

6. The automatic powder feeding equipment according to claim 4, characterized in that: The lower end of the inverted cone (41) is connected to the second conveyor (9) through a first pneumatic ball valve (42).

7. The automatic powder feeding equipment according to claim 1, characterized in that: A second pneumatic ball valve (14) is connected between each of the reaction kettles (15) and the third conveyor (10).

8. The automatic powder feeding equipment according to claim 1, characterized in that: The first conveyor (3), the second conveyor (9) and the third conveyor (10) are all screw conveyors.

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