CN218993967U

CN218993967U - Drying device for nylon 6

Info

Publication number: CN218993967U
Application number: CN202223069097.0U
Authority: CN
Inventors: 梁蒙; 刘智
Original assignee: Henan Shenma Nylon Technology Co ltd
Current assignee: Henan Shenma Nylon Technology Co ltd
Priority date: 2022-11-19
Filing date: 2022-11-19
Publication date: 2023-05-09
Anticipated expiration: 2032-11-19

Abstract

The utility model discloses a drying device for nylon 6, which relates to the technical field of nylon 6 production and comprises a drying cylinder, wherein one end of the drying cylinder is fixedly provided with an air inlet pipe, the other end of the drying cylinder is respectively fixedly provided with an air outlet pipe and a servo motor, a filter box is fixedly arranged between the air inlet pipe and the air outlet pipe, the inner wall of the filter box is fixedly provided with a fan, and the inner wall of the filter box is provided with two dust removing components; the beneficial effects of the utility model are as follows: the dust is blocked through the dust screen, the dust is prevented from adhering to the surface of the impeller of the fan, the balance of the impeller is prevented from being damaged by the dust, the service life of the fan is prolonged, the connecting plate is moved upwards through the handle, the connecting plate drives the guide strip, the dust collection box and the dust screen to move upwards, the dust collection box can penetrate through the guide pipe, and therefore the connecting plate and the dust screen are taken down, and cleaning of the dust screen is facilitated.

Description

Drying device for nylon 6

Technical Field

The utility model relates to a drying device, in particular to a drying device for nylon 6, and belongs to the technical field of nylon 6 production.

Background

Nylon 6 is also called polyamide 6, is widely applied to the aspects of automobiles, machinery, daily products, chemical building materials and the like, nylon particles are dried by hot air in the prior nylon particle dryer, and in the drying process, waste gas with heat is directly discharged into workshop air, so that the temperature of the workshop environment is directly influenced, and the cooling cost of the workshop is increased; meanwhile, dust is carried in the waste gas, so that operators are in the dust environment for a long time, and the health of the operators is endangered;

the utility model discloses a "hot air drying device for modified nylon production line" wherein the application number is "CN201820099977.7" is also the technology of becoming mature day by day, and it "includes the drying chamber, the upper end of drying chamber is provided with a plurality of fans, a plurality of connect through the air pipe between the fan, be connected with a plurality of heaters on the air pipe, the positive lower extreme of fan all is connected with the plenum box, a plurality of be connected with out the tuber pipe between the plenum box, the lower extreme of play tuber pipe is provided with a plurality of perpendicular shower nozzles, the lower extreme of shower nozzle is provided with the agitator cabin, be provided with the stirring roller in the agitator cabin with the junction of the left and right sides surface of agitator cabin all is provided with the connection pivot, is located the right-hand member be connected with the motor in the connection pivot, be connected with the shaft coupling between the motor with between the connection pivot, the left and right sides both ends of agitator cabin all are provided with hot air flow channel, hot air flow channel with be connected with the circulating pipe between the air pipe, realized hot-blast cyclic utilization, have solved the problem that heat loses in the drying process, but the device still has the defect when using in fact.

1) The circulating gas is provided with dust, the dust can circulate along with the movement of hot air, but a dust removing device is not arranged, and the dust cannot be uniformly attached to the surface of an impeller of the fan, so that the balance of the impeller can be destroyed, the rotor is finally vibrated, and the service life of the fan can be shortened due to the long-time vibration of the rotor.

Disclosure of Invention

The utility model aims to provide a drying device for nylon 6, which solves the problems that dust cannot be uniformly adhered to the surface of an impeller of a fan without arranging a dust removing device in the prior art, so that the balance of the impeller can be damaged, the rotor is finally vibrated, and the service life of the fan is shortened.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a drying device for nylon 6, includes the dry cylinder, the fixed intake pipe that is equipped with of one end of dry cylinder, the other end of dry cylinder is fixed respectively and is equipped with outlet duct and servo motor, fixed the filter cabinet that is equipped with between intake pipe and the outlet duct, the fixed fan that is equipped with of inner wall of filter cabinet, the inner wall of filter cabinet is equipped with two dust removal subassemblies, two dust removal subassemblies all include stand pipe and sealing component, two the stand pipe is all fixed to be set up on the top of filter cabinet, two the equal sliding connection of inner wall of stand pipe has the connecting plate, two the mounting groove has all been seted up on the surface of connecting plate, two the inner wall of mounting groove is all fixed and is equipped with the dust screen.

Preferably, the inside of two the stand pipes all is linked together with the inside of rose box, two the one side of connecting plate is all fixed and is equipped with dust collection box, handle and two gibs, four the gib is all fixed connection with the contact part of two dust collection boxes, wherein two one side of gib all with the inner wall sliding connection of one of them stand pipe, other two one side of gib all with the inner wall sliding connection of another stand pipe, two the front and the back of stand pipe are all fixed and are equipped with the accessory plate.

Preferably, the two seal assemblies all include first sealing washer and first support, two the first sealing washer is fixed respectively and is set up on the top of two stand pipes, two the equal sliding connection in top of first sealing washer has sealed pad, two the top of sealed pad is all fixed and is equipped with the clamp plate, two the top at the rose box is all fixed to the first support, two the top of first support is all fixed and is equipped with first cylinder, every two corresponding the flexible end of first cylinder is all fixed and is equipped with the second support that slides mutually with the top of accessory plate, two the top of second support is all fixed and is equipped with the second cylinder, two the flexible end of second cylinder respectively with the top fixed connection of two clamp plates.

Preferably, the bottom mounting of rose box is equipped with the connecting block, the surface of connecting block and the fixed surface connection of dry section of thick bamboo, the positive inner wall of rose box and the inner wall at back are all fixed and are equipped with two electrical heating boards, the fixed two second sealing washer that are equipped with of inner wall of rose box, two one side of second sealing washer respectively with the opposite side sliding connection of two connecting plates, two second sealing washer, two sealed pads and two first sealing washer all adopt the silicone rubber material to make.

Preferably, the surface of the air inlet pipe and the surface of the air outlet pipe are fixedly provided with first electric valves.

Preferably, the inner wall of the drying cylinder is fixedly provided with two baffles and two filter screens respectively, the surfaces of the two baffles are fixedly connected with the surfaces of the two filter screens respectively, the surfaces of the drying cylinder are fixedly provided with a feeding pipe, a discharging pipe and two supporting blocks respectively, the surface of the feeding pipe is fixedly provided with a second electric valve, the surface of the discharging pipe is fixedly provided with a third electric valve, and one of the surfaces of the supporting blocks is fixedly provided with a switch panel.

Preferably, the transmission shaft of the servo motor is fixedly provided with a transmission rod, the surface of the transmission rod is fixedly provided with a spiral blade, the spiral blade is arranged in the drying cylinder, one end of the transmission rod is rotationally connected with the inner wall of the other end of the drying cylinder through a sealing bearing, and the other end of the transmission rod penetrates through one side of one baffle and is rotationally connected with one side of the other baffle through the sealing bearing.

Preferably, the surface of the switch panel is provided with a first air cylinder switch, a second air cylinder switch, a fan switch, four electric heating plate switches, a first electric valve switch, a second electric valve switch, a third electric valve switch and a servo motor switch respectively, and the four first air cylinders, two second air cylinders, a fan, four electric heating plates, two first electric valves, a second electric valve, a third electric valve and a servo motor are electrically connected with an external power supply through the first air cylinder switch, the second air cylinder switch, the fan switch, the four electric heating plate switches and the first electric valve switch respectively.

Compared with the related art, the drying device for nylon 6 has the following beneficial effects:

1. dust is blocked by the dust screen, so that dust is prevented from adhering to the surface of an impeller of the fan, the balance of the impeller is prevented from being damaged by the dust, the service life of the fan is prolonged, the connecting plate is moved upwards by the handle, the connecting plate drives the guide strip, the dust collection box and the dust screen to move upwards, the dust collection box can penetrate through the guide pipe, and therefore the connecting plate and the dust screen are taken down, and cleaning of the dust screen is facilitated;

2. the pressing plate is driven to move upwards through the second air cylinder, the pressing plate drives the sealing gasket to move upwards, and the sealing gasket is separated from the first sealing ring, so that the sealing of the guide pipe is relieved, then the second bracket is pushed to move through the first air cylinder, the second bracket drives the second air cylinder to move, and finally the pressing plate is not located right above the guide pipe any more, and the connecting plate is pulled out to be cleaned;

3. drive the transfer line through servo motor and rotate, the transfer line drives helical blade and rotates, and the filter screen of setting can block nylon grain, and then helical blade promotes nylon grain, promotes the outflow of nylon grain, promotes work efficiency.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is a schematic cross-sectional view of the filter box of the present utility model;

FIG. 4 is an enlarged schematic view of the structure of FIG. 3A according to the present utility model;

fig. 5 is an enlarged schematic view of the structure of fig. 3B according to the present utility model.

In the figure: 1. a drying cylinder; 2. an air inlet pipe; 3. an air outlet pipe; 4. a filter box; 5. a dust removal assembly; 501. a guide tube; 502. a connecting plate; 503. a mounting groove; 504. a dust screen; 505. a seal assembly; 5051. a first seal ring; 5052. a sealing gasket; 5053. a pressing plate; 5054. a first bracket; 5055. a first cylinder; 5056. a second bracket; 5057. a second cylinder; 6. a blower; 7. a dust collection box; 8. a guide bar; 9. a handle; 10. an electric heating plate; 11. a first electrically operated valve; 12. a second seal ring; 13. a baffle; 14. a filter screen; 15. a feed pipe; 16. a discharge pipe; 17. a support block; 18. a second electrically operated valve; 19. a third electrically operated valve; 20. a servo motor; 21. a transmission rod; 22. a helical blade; 23. a connecting block; 24. an auxiliary plate; 25. and a switch panel.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1:

referring to fig. 1-5, the utility model provides a drying device for nylon 6, comprising a drying cylinder 1, wherein one end of the drying cylinder 1 is fixedly provided with an air inlet pipe 2, the other end of the drying cylinder 1 is respectively fixedly provided with an air outlet pipe 3 and a servo motor 20, a filter box 4 is fixedly arranged between the air inlet pipe 2 and the air outlet pipe 3, the inner wall of the filter box 4 is fixedly provided with a fan 6, and the inner wall of the filter box 4 is provided with two dust removing components 5;

the bottom end of the filter box 4 is fixedly provided with a connecting block 23, the surface of the connecting block 23 is fixedly connected with the surface of the drying cylinder 1, the front inner wall and the back inner wall of the filter box 4 are fixedly provided with two electric heating plates 10, the inner wall of the filter box 4 is fixedly provided with two second sealing rings 12, one sides of the two second sealing rings 12 are respectively and slidably connected with the other sides of the two connecting plates 502, the two second sealing rings 12 are made of silicone rubber materials, the air conveyed by the fan 6 is heated by the electric heating plates 10, and the sealing performance is enhanced by the bonding of the two second sealing rings 12 with the two connecting plates 502, so that the air can pass through the dust screen 504, and the silicone rubber materials have good elasticity even at 200 degrees and can meet the existing sealing requirements;

the surface of the air inlet pipe 2 and the surface of the air outlet pipe 3 are fixedly provided with the first electric valves 11, the two first electric valves 11 are closed before taking materials, gas is prevented from reversely passing through the dust screen 504 during taking materials, dust is prevented from polluting workshop air, and physical and mental health of workers is facilitated;

the inner wall of the drying cylinder 1 is fixedly provided with two baffles 13 and two filter screens 14 respectively, the surfaces of the two baffles 13 are fixedly connected with the surfaces of the two filter screens 14 respectively, the surface of the drying cylinder 1 is fixedly provided with a feed pipe 15, a discharge pipe 16 and two supporting blocks 17 respectively, the surface of the feed pipe 15 is fixedly provided with a second electric valve 18, the surface of the discharge pipe 16 is fixedly provided with a third electric valve 19, the front surface of one supporting block 17 is fixedly provided with a switch panel 25, the arranged baffles 13 stabilize a transmission rod 21, the two filter screens 14 can block nylon particles, the nylon particles are prevented from entering the inside of the feed pipe 15 or the discharge pipe 16 by mistake during movement, meanwhile, the contact area between hot air flow and the nylon particles is increased, and the drying efficiency is improved;

the transmission shaft of the servo motor 20 is fixedly provided with a transmission rod 21, the surface of the transmission rod 21 is fixedly provided with a helical blade 22, the helical blade 22 is arranged in the drying cylinder 1, one end of the transmission rod 21 is rotationally connected with the inner wall of the other end of the drying cylinder 1 through a sealing bearing, the other end of the transmission rod 21 passes through one side of one baffle 13 and is rotationally connected with one side of the other baffle 13 through the sealing bearing, and the nylon Long Li at the bottom of the drying cylinder 1 is pushed by the cooperation of the servo motor 20, the transmission rod 21 and the helical blade 22, so that the nylon particles are discharged;

the surface of the switch panel 25 is respectively provided with a fan switch, four electric heating plate switches, a first electric valve switch, a second electric valve switch, a third electric valve switch and a servo motor switch, and the fan 6, the four electric heating plates 10, the two first electric valves 11, the second electric valve 18, the third electric valve 19 and the servo motor 20 are respectively electrically connected with an external power supply through the fan switch, the four electric heating plate switches, the first electric valve switch, the second electric valve switch, the third electric valve switch and the servo motor switch;

referring to fig. 1-5, the present utility model provides a drying device for nylon 6, which further includes two dust removing assemblies 5, wherein the two dust removing assemblies 5 each include a guide pipe 501 and a sealing assembly 505, the two guide pipes 501 are fixedly arranged at the top end of a filter box 4, the inner walls of the two guide pipes 501 are slidably connected with connecting plates 502, the surfaces of the two connecting plates 502 are provided with mounting grooves 503, and the inner walls of the two mounting grooves 503 are fixedly provided with dust-proof nets 504;

the inside of two guide pipes 501 are communicated with the inside of the filter box 4, a dust collection box 7, a handle 9 and two guide strips 8 are fixedly arranged on one side of two connecting plates 502, the four guide strips 8 are fixedly connected with the contact parts of the two dust collection boxes 7, one side of each guide strip 8 is slidably connected with the inner wall of one guide pipe 501, one side of the other guide strip 8 is slidably connected with the inner wall of the other guide pipe 501, auxiliary plates 24 are fixedly arranged on the front and back sides of the two guide pipes 501, the dust collection boxes 7 can prevent dust from falling into the inside of the filter box 4 when the connecting plates 502 are pulled, the guide strips 8 can be propped against the guide pipes 501 to prevent the connecting plates 502 from shaking due to wind force, the connecting plates 502 are conveniently pulled out by the arranged handle 9, and the auxiliary plates 24 can guide the second brackets 5056;

specifically, as shown in fig. 1, 2, 3, 4 and 5, the dust-proof net 504 can block dust, avoid dust to adhere to the surface of the impeller of the fan 6, prevent the balance of the impeller from being damaged by dust, thereby prolonging the service life of the fan 6, when the dust on the surface of the dust-proof net 504 needs to be removed, firstly, the sealing effect of the sealing component 505 is relieved, then the connecting plate 502 is moved upwards by the handle 9, the connecting plate 502 drives the guide strip 8, the dust collection box 7 and the dust-proof net 504 to move upwards, and the dust collection box 7 can pass through the guide pipe 501, thereby removing the connecting plate 502 and the dust-proof net 504, and facilitating the cleaning of the dust-proof net 504.

Example 2:

the two sealing assemblies 505 comprise first sealing rings 5051 and first brackets 5054, the two first sealing rings 5051 are respectively and fixedly arranged at the top ends of the two guide pipes 501, the top ends of the two first sealing rings 5051 are respectively and slidably connected with sealing gaskets 5052, the top ends of the two sealing gaskets 5052 are respectively and fixedly provided with pressing plates 5053, the two first brackets 5054 are respectively and fixedly arranged at the top ends of the filter box 4, the top ends of the two first brackets 5054 are respectively and fixedly provided with first air cylinders 5055, the telescopic ends of each two corresponding first air cylinders 5055 are respectively and fixedly provided with second brackets 5056 which slide with the top ends of the auxiliary plates 24, the top ends of the two second brackets 5056 are respectively and fixedly connected with the top ends of the two pressing plates 5053;

the two gaskets 5052 and the two first sealing rings 5051 are made of a silicone rubber material, and the silicone rubber material has good elasticity even at 200 degrees, so that the existing sealing requirements can be met;

the surface of the switch panel 25 is respectively provided with a first cylinder switch and a second cylinder switch, and four first cylinders 5055 and two second cylinders 5057 are respectively electrically connected with an external power supply through the first cylinder switch and the second cylinder switch;

specifically, as shown in fig. 1, 2, 3 and 4, when the sealing is required to be released, the second cylinder 5057 is started through the second cylinder switch, the telescopic end of the second cylinder 5057 is shortened, the second cylinder 5057 drives the pressing plate 5053 to move upwards, the pressing plate 5053 drives the sealing pad 5052 to move upwards, the sealing pad 5052 is separated from the first sealing ring 5051, so that the sealing on the guide pipe 501 is released, then the first cylinder 5055 is started through the first cylinder switch, the telescopic end of the first cylinder 5055 is extended, the first cylinder 5055 pushes the second bracket 5056 to move, the second bracket 5056 drives the second cylinder 5057 to move, and finally the pressing plate 5053 is not located right above the guide pipe 501 any more, so that the cleaning of the connecting plate 502 is facilitated.

Working principle: when the nylon 6 drying device is particularly used, the fan 6 is started through the fan switch, the fan 6 generates air flow, the air flow forms circulation through the air inlet pipe 2, the drying cylinder 1, the air outlet pipe 3 and the filter box 4, the electric heating plate 10 is started through the electric heating plate switch, the temperature of the air flow is lifted through the electric heating plate 10, the air flow passes through the two filter screens 14, so that nylon particles are dried, the dust screen 504 can block dust, the dust is prevented from adhering to the surface of an impeller of the fan 6, the balance of the impeller is prevented from being damaged by the dust, the service life of the fan 6 is prolonged, when the dust on the surface of the dust screen 504 needs to be cleaned, the second cylinder 5057 is started through the second cylinder switch, the telescopic end of the second cylinder 5057 is shortened, the second cylinder 5057 drives the pressing plate 5053 to move upwards, the pressing plate 5053 drives the sealing pad 5052 to move upwards, the gasket 5052 is separated from the first gasket 5051 to release the sealing of the guide pipe 501, then the first cylinder 5055 is started by the first cylinder switch, the telescopic end of the first cylinder 5055 is extended, the first cylinder 5055 pushes the second bracket 5056 to move, the second bracket 5056 drives the second cylinder 5057 to move, finally, the pressing plate 5053 is not positioned right above the guide pipe 501 any more, the connection plate 502 is beneficial to pulling out the connection plate 502 for cleaning, then the connection plate 502 is moved upwards by the handle 9, the connection plate 502 drives the guide strip 8, the dust collection box 7 and the dust collection net 504 to move upwards, the dust collection box 7 can pass through the guide pipe 501 to remove the connection plate 502 and the dust collection net 504, cleaning of the dust collection net 504 is facilitated, when material is required to be taken, the third electric valve 19 is started by the third electric valve switch, the servo motor 20 is started by the servo motor switch, and the servo motor 20 drives the transmission rod 21 to rotate, the transmission rod 21 drives the helical blade 22 to rotate, the arranged filter screen 14 can block nylon particles, and then the helical blade 22 pushes the nylon particles, so that the outflow of the nylon particles is promoted, and the working efficiency is improved.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A drying device for nylon 6, includes drying cylinder (1), its characterized in that, the one end of drying cylinder (1) is fixed and is equipped with intake pipe (2), the other end of drying cylinder (1) is fixed respectively and is equipped with outlet duct (3) and servo motor (20), fixed rose box (4) that are equipped with between intake pipe (2) and outlet duct (3), the inner wall of rose box (4) is fixed and is equipped with fan (6), the inner wall of rose box (4) is equipped with two dust removal subassembly (5), two dust removal subassembly (5) all include stand pipe (501) and sealing component (505), two stand pipe (501) all are fixed to be set up on the top of rose box (4), two the equal sliding connection of inner wall of stand pipe (501) has connecting plate (502), two mounting groove (503) have all been seted up on the surface of connecting plate (502), two the inner wall of mounting groove (503) is all fixed and is equipped with dust screen (504).

2. A drying apparatus for nylon 6 as defined in claim 1, wherein: two inside of stand pipe (501) all is linked together with the inside of rose box (4), two one side of connecting plate (502) is all fixed and is equipped with dust collection box (7), handle (9) and two gib block (8), four gib block (8) all fixed connection with the contact part of two dust collection boxes (7), wherein two one side of gib block (8) all with the inner wall sliding connection of one of them stand pipe (501), other two one side of gib block (8) all with the inner wall sliding connection of another stand pipe (501), two the front and the back of stand pipe (501) are all fixed and are equipped with accessory plate (24).

3. A drying apparatus for nylon 6 as defined in claim 2, wherein: the two sealing assemblies (505) comprise a first sealing ring (5051) and a first support (5054), the two first sealing rings (5051) are respectively fixedly arranged at the top ends of two guide pipes (501), the two first sealing rings (5051) are respectively and slidably connected with sealing gaskets (5052), the two sealing gaskets (5052) are respectively and fixedly arranged at the top ends of the filtering boxes (4), the two first supports (5054) are respectively and fixedly arranged at the top ends of the filtering boxes (4), the first cylinders (5055) are respectively and fixedly arranged at the top ends of the first supports (5054), the telescopic ends of the first cylinders (5055) corresponding to each other are respectively and fixedly provided with a second support (5056) which is slidably connected with the top ends of an auxiliary plate (24), and the telescopic ends of the two second cylinders (5057) are respectively and fixedly connected with the top ends of the two pressing plates (5053).

4. A drying apparatus for nylon 6 as defined in claim 3, wherein: the bottom mounting of rose box (4) is equipped with connecting block (23), the surface of connecting block (23) is connected with the fixed surface of dry section of thick bamboo (1), the positive inner wall of rose box (4) and the inner wall at back are all fixed to be equipped with two electrical heating boards (10), the fixed two second sealing washer (12) that are equipped with of inner wall of rose box (4), two one side of second sealing washer (12) respectively with the opposite side sliding connection of two connecting plates (502), two second sealing washer (12), two sealed pad (5052) and two first sealing washer (5051) all adopt silicone rubber material to make.

5. A drying apparatus for nylon 6 as defined in claim 4, wherein: the surface of the air inlet pipe (2) and the surface of the air outlet pipe (3) are fixedly provided with a first electric valve (11).

6. A drying apparatus for nylon 6 as defined in claim 5, wherein: the inner wall of a drying cylinder (1) is fixedly provided with two baffles (13) and two filter screens (14) respectively, two the surface of baffles (13) is fixedly connected with the surface of two filter screens (14) respectively, the surface of the drying cylinder (1) is fixedly provided with a feed pipe (15), a discharge pipe (16) and two supporting blocks (17) respectively, the surface of the feed pipe (15) is fixedly provided with a second electric valve (18), the surface of the discharge pipe (16) is fixedly provided with a third electric valve (19), and one of the surfaces of the supporting blocks (17) is fixedly provided with a switch panel (25).

7. A drying apparatus for nylon 6 as defined in claim 6, wherein: the utility model discloses a drying device, including servo motor (20), screw blade (22), sealing bearing, driving shaft, screw blade (22), sealing bearing, driving shaft (21) is fixed to be equipped with driving lever (21) of the transmission shaft of servo motor (20), the fixed surface of driving lever (21) is equipped with screw blade (22), inside that drying tube (1) was arranged in to screw blade (22), the inner wall rotation of one end of driving lever (21) and the other end of drying tube (1) is connected, the other end of driving lever (21) passes one side of one of them baffle (13) and rotates through sealing bearing and one side of another baffle (13) is connected.

8. A drying apparatus for nylon 6 as defined in claim 7, wherein: the surface of the switch panel (25) is provided with a first air cylinder switch, a second air cylinder switch, a fan switch, four electric heating plate switches, a first electric valve switch, a second electric valve switch, a third electric valve switch and a servo motor switch respectively, wherein the first air cylinder (5055), the two second air cylinders (5057), the fan (6), the four electric heating plates (10), the two first electric valves (11), the second electric valves (18), the third electric valves (19) and the servo motor (20) are electrically connected with an external power supply through the first air cylinder switch, the second air cylinder switch, the fan switch, the four electric heating plate switches, the first electric valve switch, the second electric valve switch, the third electric valve switch and the servo motor switch respectively.