Anti-blocking vacuum rake dryer

Abstract

The utility model relates to the technical field of drying machines, and discloses an anti-blocking vacuum rake type drying machine which comprises a supporting machine frame, a drying barrel and a driving mechanism are fixedly installed on the upper side of the supporting machine frame, a control valve is fixedly installed on the upper side of the drying barrel, and a filtering tank is fixedly installed on the upper side of the control valve. A lower opening of the filtering tank communicates with the drying barrel, a filtering barrel is fixedly installed in the filtering tank, the lower opening of the filtering barrel is controlled to be opened and closed through a control valve, spiral blades are rotationally installed in the filtering barrel, and a driving motor is fixedly installed at the top end of the filtering tank. According to the drying machine, air and water vapor in the drying barrel are sucked from the filtering tank through the vacuumizing pipe, when the filtering barrel in the drying barrel is used for impurity filtering and back-blowing unblocking, pressure gas is injected into the filtering tank through the vacuumizing pipe, back-blowing unblocking is conducted on the filtering barrel, and in the process, rotation of the spiral blade is used for rotating the spiral blade, so that the drying effect is improved. Blockages attached to the inner side of the filter cartridge can be effectively scraped off, and a better blockage clearing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of dryers, in particular to an anti-blocking vacuum rake dryer. Background Art

[0002] The vacuum rake dryer is suitable for drying paste materials that are not resistant to high temperatures, are flammable, and are easily oxidized at room temperature. During the production process, the air and water vapor in the tank need to be extracted, leaving the solid materials behind, but the flying powder inside can easily cause blockage of the filter component. In order to solve this problem, the patent document with announcement number CN104713335B in the prior art discloses an anti-blocking vacuum rake dryer, including a cylinder, a gas-solid separation filter device connected to the cylinder, an air outlet pipe connected to a vacuum pump is provided at the top center position of the gas-solid separation filter device, a cylindrical filter bracket is vertically installed on the inner side of the upper end surface of the gas-solid separation filter device, an ultrafine filter is installed on the filter bracket, a back-blowing air inlet is installed at the top of the gas-solid separation filter device, and a two-way pressure gauge is connected to the gas-solid separation filter device. The present invention directly connects the gas-solid separation filter device with the dryer cylinder, which not only has a compact structure, occupies a small space, is easy to use, and reduces fixed asset investment, but also is more conducive to product quality control because there is no need to collect products at two places, and effectively solves the problem of dust clogging the filter screen during the drying process of ultrafine powder materials with small particle size, high porosity and low density.

[0003] The prior art uses back-blowing technology to clean the blockage in the filter assembly. However, in actual use, some powder passes through the filter assembly and enters its inner side. When encountering water vapor, it gathers into larger particles of powder. During back-blowing, this larger particle of powder cannot pass through the filter holes and is discharged. Instead, it gathers and adheres to the inner side of the filter assembly, resulting in blockage of the filter holes from the inner side of the filter assembly. This will make the back-blowing unblocking ineffective. Based on this, the existing dryer has the problem of blockage due to back-blowing, which needs further improvement. Utility Model Content

[0004] The utility model aims to provide an anti-blocking vacuum rake dryer to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-blocking vacuum rake dryer, comprising a support frame, a drying cylinder and a driving mechanism are fixedly installed on the upper side of the support frame, a rotating main shaft is rotatably installed inside the drying cylinder, a stirring rake is fixedly installed on the surface of the rotating main shaft, the driving mechanism drives the rotating main shaft to rotate, a feeding port and a vacuum window are fixedly installed on the upper surface of the drying cylinder, and a discharge valve is fixedly installed on the lower side of the drying cylinder;

[0006] A control valve is fixedly installed at the vacuum window, a filter tank is fixedly installed on the upper side of the control valve, the lower opening of the filter tank is connected with the drying cylinder, a filter cartridge is fixedly installed inside the filter tank, the opening and closing of the lower opening of the filter cartridge is controlled by the control valve, a spiral blade is rotatably installed inside the filter cartridge, a drive motor is fixedly installed on the top of the filter tank, the drive motor drives the spiral blade to rotate, a vacuum tube is fixedly installed on the top of the filter tank, the vacuum tube is connected with the inner cavity of the filter cartridge, pressurized gas is injected into the filter tank by means of the vacuum tube, and the filter cartridge is backblown and cleared.

[0007] In some embodiments, the filter cartridge is a straight cylindrical structure with openings at the top and bottom, a plurality of filter holes are provided on the surface of the filter cartridge, a filter net is fixedly installed on the inner wall of the filter cartridge, the filter net covers the filter hole area of ​​the filter cartridge, and the filter holes of the filter net are relatively fine and can filter dust in the air.

[0008] In some embodiments, the control valve includes a valve seat and a flap, the valve seat is fixedly installed at the vacuum port, a rotating cylinder is fixedly installed on the outer side of the valve seat, the bottom end of the filter cartridge extends into the valve seat, a flow channel gap is reserved between the bottom end of the filter cartridge and the inside of the valve seat, the flap is rotatably arranged in the bottom end opening of the filter cartridge, the rotating cylinder drives the flap to rotate, the flap is turned to a horizontal state to close the lower opening of the filter cartridge, and when the flap is turned to a vertical state, the lower opening of the filter cartridge is opened to discharge impurities in the filter cartridge.

[0009] In some embodiments, two baffles are fixedly installed on the inner wall of the drying cylinder, and the two baffles are symmetrically arranged on both sides of the lower opening of the control valve. The discharge valve is arranged directly below the control valve. A plurality of stirring rods are fixedly installed on the surface of the rotating main shaft between the control valve and the discharge valve. The baffles have a certain separation effect to reduce the amount of dust discharged.

[0010] In some embodiments, a backblowing pipe is fixedly installed on the top of the filter tank, a connecting sleeve is fixedly installed on the top of the filter cartridge, the connecting sleeve is fixedly connected to the inner wall of the top of the filter tank, the backblowing pipe and the vacuum tube are both connected to the inner cavity of the connecting sleeve, and the backblowing pipe is used to inject inert gas into the filter tank for backblowing and clearing.

[0011] In some embodiments, the drying cylinder includes an inner liner and an insulating outer shell, and an interlayer cavity is formed between the inner liner and the insulating outer shell, and a spiral heating tube is installed in the interlayer cavity. The two ends of the drying cylinder are respectively fixed with an input pipe and an output pipe of a heat source, and the input pipe and the output pipe of the heat source are respectively connected to the two ends of the heating tube. The driving mechanism includes a servo motor and a reduction gear box, and the servo motor drives the rotating main shaft to rotate through the transmission of the reduction gear box. Beneficial Effects

[0012] The utility model provides an anti-blocking vacuum rake dryer, which has the following beneficial effects:

[0013] 1. This anti-blocking vacuum rake dryer sucks the air and water vapor in the drying cylinder from the filter tank through the vacuum pipe, and uses the internal filter cartridge to filter impurities. When back-blowing to clear blockage, the vacuum pipe is used to inject pressurized gas into the filter tank to back-blow the filter cartridge to clear blockage. In this process, the rotation of the spiral blade can effectively scrape off the attached blockage on the inside of the filter cartridge, avoiding the situation where the inside of the filter cartridge is blocked by large particles of impurities and causing back-blowing failure, thereby achieving a better clearing effect.

[0014] 2. This anti-blocking vacuum rake dryer is equipped with a control valve. The flap in the control valve rotates to control the opening and closing of the lower opening of the filter cartridge. The flap is turned to a horizontal state to close the lower opening of the filter cartridge. When the filter cartridge is back-blown, the blockages in the filter screen and the flow channel gap can be cleared at the same time. When it is turned to a vertical state, the lower opening of the filter cartridge is opened, and the material scraped off by the spiral blade can be discharged into the drying cylinder. By setting an independent back-blowing pipe, during the operation of the dryer, if a sudden blockage occurs, the back-blowing pipe can be used to inject inert gas into the filter tank for back-blowing and clearing. There is no need to stop the machine to discharge materials for clearing and repairing, which greatly improves the convenience of operation and makes the dryer have a better anti-blocking function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model (I);

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model (II);

[0017] Figure 3 This is a schematic diagram of the front section structure of the utility model;

[0018] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0019] Figure 5 It is a schematic diagram of the front view structure of the filter cartridge.

[0020] In the figure: 1 supporting frame, 2 drying cylinder, 3 rotating main shaft, 4 stirring rake, 5 feeding port, 6 discharging valve, 7 control valve, 8 filter tank, 9 filter cartridge, 10 driving motor, 11 spiral blade, 12 filter screen, 13 valve seat, 14 flap, 15 rotating cylinder, 16 flow channel gap, 17 baffle, 18 stirring rod, 19 backblowing pipe, 20 connecting sleeve, 21 heating pipe, 221 input pipe, 222 output pipe, 23 servo motor, 24 reduction box, 25 vacuum pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 The utility model provides a technical solution: an anti-blocking vacuum rake dryer, comprising a supporting frame 1, a drying cylinder 2 and a driving mechanism are fixedly installed on the upper side of the supporting frame 1, the drying cylinder 2 comprises an inner liner and a heat-insulating outer shell, an interlayer cavity is formed between the inner liner and the heat-insulating outer shell, and a spiral heating tube 21 is installed in the interlayer cavity, an input pipe 221 and an output pipe 222 of a heat source are fixedly installed at both ends of the drying cylinder 2, the input pipe 221 and the output pipe 222 of the heat source are respectively connected to the two ends of the heating tube 21, heat transfer oil is inputted by the input pipe 221, after the heat transfer oil enters the heating tube 21, the heat is transferred to the drying cylinder 2, and then the heat transfer oil is discharged from the output pipe 222.

[0023] The driving mechanism includes a servo motor 23 and a reduction box 24 . The servo motor 23 drives the rotating main shaft 3 to rotate through the transmission of the reduction box 24 .

[0024] A rotating main shaft 3 is rotatably installed inside the drying cylinder 2, a stirring rake 4 is fixedly installed on the surface of the rotating main shaft 3, a driving mechanism drives the rotating main shaft 3 to rotate, a feeding port 5 and a vacuum window are fixedly installed on the upper surface of the drying cylinder 2, and a discharge valve 6 is fixedly installed on the lower side of the drying cylinder 2.

[0025] A control valve 7 is fixedly installed at the vacuum window, a filter tank 8 is fixedly installed on the upper side of the control valve 7, the lower opening of the filter tank 8 is communicated with the drying cylinder 2, a filter cartridge 9 is fixedly installed inside the filter tank 8, and the lower opening of the filter cartridge 9 is opened and closed by the control valve 7. Specifically, the filter cartridge 9 is a straight cylindrical structure with upper and lower openings, a plurality of filter holes are opened on the surface of the filter cartridge 9, a filter screen 12 is fixedly installed on the inner wall of the filter cartridge 9, and the filter screen 12 covers the filter hole area of ​​the filter cartridge 9, such as Figure 5 shown.

[0026] Among them, the control valve 7 includes a valve seat 13 and a flap 14. The valve seat 13 is fixedly installed at the vacuum port. A rotating cylinder 15 is fixedly installed on the outer side of the valve seat 13. The bottom end of the filter cartridge 9 extends into the valve seat 13. A flow channel gap 16 is reserved between the bottom end of the filter cartridge 9 and the inside of the valve seat 13. The flap 14 is rotatably arranged in the bottom end opening of the filter cartridge 9, and the rotating cylinder 15 drives the flap 14 to rotate.

[0027] A spiral blade 11 is rotatably installed inside the filter cartridge 9, and the spiral blade 11 is in sliding contact with the inner wall of the filter screen 12. A driving motor 10 is fixedly installed on the top of the filter tank 8, and the driving motor 10 drives the spiral blade 11 to rotate. A vacuum tube 25 is fixedly installed on the top of the filter tank 8, and the vacuum tube 25 is connected to the inner cavity of the filter cartridge 9.

[0028] Two baffle plates 17 are fixedly installed on the inner wall of the drying cylinder 2, and the two baffle plates 17 are symmetrically arranged on both sides of the lower opening of the control valve 7. The discharge valve 6 is arranged directly below the control valve 7. A plurality of stirring rods 18 are fixedly installed on the surface of the rotating main shaft 3 between the control valve 7 and the discharge valve 6. When the material is dried, a large amount of dust will be generated. The baffle plates 17 have a certain separation effect to reduce the amount of dust discharged.

[0029] By setting a control valve 7, the flap 14 in the control valve 7 can be rotated to control the opening and closing of the lower opening of the filter cartridge 9. The flap 14 is turned to a horizontal state to close the lower opening of the filter cartridge 9. When the filter cartridge 9 is backblown, the blockages in the filter screen 12 and the flow channel gap 16 can be cleaned at the same time. When the flap 14 is turned to a vertical state, the lower opening of the filter cartridge 9 is opened, and the materials scraped off by the spiral blade 11 can be discharged into the drying cylinder 2.

[0030] In this embodiment, Figure 3 , 4 As shown, a backflush pipe 19 is fixedly installed on the top of the filter tank 8, and a connecting sleeve 20 is fixedly installed on the top of the filter cylinder 9. The connecting sleeve 20 is fixedly connected to the inner wall of the top of the filter tank 8, and the backflush pipe 19 and the vacuum pipe 25 are both connected to the inner cavity of the connecting sleeve 20. By setting an independent backflush pipe 19, during the operation of the dryer, if a sudden blockage occurs, the backflush pipe 19 can be used to inject inert gas into the filter tank 8 for backflush and clearing, without stopping the machine and discharging materials for clearing and repairing, which greatly improves the convenience of operation and enables the dryer to have a better anti-blockage function.

[0031] During use, the material is input into the drying cylinder 2 through the feeding port 5, the air and water vapor in the drying cylinder 2 are sucked from the filter tank 8 through the vacuum pipe 25, the lower opening of the filter cylinder 9 is closed by the flap 14, the internal filter cylinder 9 and the filter screen 12 are used to filter impurities, the rotating main shaft 3 rotates, and the material is stirred by the stirring rake 4. The material is heated by the high temperature of the drying cylinder 2, the water evaporates, and the water vapor and air enter the filter tank 8 through the flow channel gap 16 and are sucked away from the vacuum pipe 25. When blockage occurs, pressurized gas is injected into the filter tank 8 through the vacuum pipe 25 or the backblowing pipe 19 to backblow the filter screen 12 to clear the blockage. In this process, the rotation of the spiral blade 11 can effectively scrape off the attached blockage on the inside of the filter screen 12, avoid the situation where the inside of the filter screen 12 is blocked by large particles of impurities and cause backblowing failure, and achieve a better clearing effect.

[0032] 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 anti-blocking vacuum rake dryer, comprising a support frame (1), characterized in that: A drying cylinder (2) and a driving mechanism are fixedly mounted on the upper side of the support frame (1); a rotating main shaft (3) is rotatably mounted inside the drying cylinder (2); a stirring rake (4) is fixedly mounted on the surface of the rotating main shaft (3); the driving mechanism drives the rotating main shaft (3) to rotate; a feeding port (5) and a vacuum window are fixedly mounted on the upper surface of the drying cylinder (2); and a discharge valve (6) is fixedly mounted on the lower side of the drying cylinder (2); A control valve (7) is fixedly mounted at the vacuum window, a filter tank (8) is fixedly mounted on the upper side of the control valve (7), a lower opening of the filter tank (8) is communicated with the drying cylinder (2), a filter cartridge (9) is fixedly mounted inside the filter tank (8), the lower opening of the filter cartridge (9) is controlled to open and close by the control valve (7), a spiral blade (11) is rotatably mounted inside the filter cartridge (9), a drive motor (10) is fixedly mounted on the top of the filter tank (8), the drive motor (10) drives the spiral blade (11) to rotate, a vacuum pipe (25) is fixedly mounted on the top of the filter tank (8), and the vacuum pipe (25) is communicated with the inner cavity of the filter cartridge (9).

2. The anti-blocking vacuum rake dryer according to claim 1, characterized in that: The filter cartridge (9) is in the form of a straight cylinder with openings at the top and bottom. A plurality of filter holes are provided on the surface of the filter cartridge (9). A filter screen (12) is fixedly mounted on the inner wall of the filter cartridge (9). The filter screen (12) covers the filter hole area of ​​the filter cartridge (9).

3. The anti-blocking vacuum rake dryer according to claim 2, characterized in that: The control valve (7) comprises a valve seat (13) and a flap (14); the valve seat (13) is fixedly mounted at the vacuum port; a rotating cylinder (15) is fixedly mounted on the outer side of the valve seat (13); the bottom end of the filter cartridge (9) extends into the valve seat (13); a flow channel gap (16) is reserved between the bottom end of the filter cartridge (9) and the inside of the valve seat (13); the flap (14) is rotatably arranged in the bottom end opening of the filter cartridge (9); and the rotating cylinder (15) drives the flap (14) to rotate.

4. The anti-blocking vacuum rake dryer according to claim 3, characterized in that: Two baffle plates (17) are fixedly mounted on the inner wall of the drying cylinder (2), and the two baffle plates (17) are symmetrically arranged on both sides of the lower opening of the control valve (7).

5. The anti-blocking vacuum rake dryer according to claim 4, characterized in that: The discharge valve (6) is arranged directly below the control valve (7), and a plurality of stirring rods (18) are fixedly mounted on the surface of the rotating main shaft (3) between the control valve (7) and the discharge valve (6).

6. An anti-blocking vacuum rake dryer according to any one of claims 1 to 5, characterized in that: A backflush pipe (19) is fixedly mounted on the top of the filter tank (8), a connecting sleeve (20) is fixedly mounted on the top of the filter cartridge (9), the connecting sleeve (20) is fixedly connected to the inner wall of the top of the filter tank (8), and the backflush pipe (19) and the vacuum pipe (25) are both in communication with the inner cavity of the connecting sleeve (20).

7. The anti-blocking vacuum rake dryer according to claim 6, characterized in that: The drying cylinder (2) comprises an inner liner and a heat-insulating outer shell, an interlayer cavity is formed between the inner liner and the heat-insulating outer shell, and a spiral heating tube (21) is installed in the interlayer cavity, and an input tube (221) and an output tube (222) of a heat source are fixedly installed at both ends of the drying cylinder (2), and the input tube (221) and the output tube (222) of the heat source are respectively connected to the two ends of the heating tube (21).

8. The anti-blocking vacuum rake dryer according to claim 7, characterized in that: The driving mechanism comprises a servo motor (23) and a reduction box (24), and the servo motor (23) drives the rotating main shaft (3) to rotate through the transmission of the reduction box (24).

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