CN219551087U - Drying and dust removing device for cab floor production - Google Patents

Abstract

The utility model discloses a drying and dedusting device for cab floor production, which relates to the technical field of plate drying and dedusting devices and comprises a box body, conveying devices symmetrically arranged on two sides of the box body, a rotating device arranged in an inner cavity of the box body, a clamping device fixedly arranged on the rotating device, a drying device fixedly arranged at the bottom of the box body, a circulating device arranged on one side of the drying device and an ash removing device arranged on one side of the circulating device. According to the utility model, through the rotary device and the clamping device, automatic turn-over of the plates can be realized, so that no dead angle exists in the drying and ash removal work, a plurality of groups of plates can be subjected to drying and ash removal work at the same time, the plates are produced in a flow manner, and the processing time is saved; through circulating device and ash removal device, can be with taking grey gas suction circulating device in, get back to drying device after filtering ash by the water in the rose box, realize recycling, also can not pollute the environment when saving energy.

Description

Drying and dust removing device for cab floor production

Technical Field

The utility model relates to the technical field of plate drying and dust removing devices, in particular to a drying and dust removing device for cab floor production.

Background

At present, the cab floor structure used on locomotives in China is split movable, and the whole cab floor is formed by splicing a plurality of movable floors with different numbers or fixed movable floors on floor steel beams welded on an underframe iron floor of the locomotive; in order to overhaul the electric appliance circuits and brake pipelines under the cab floor, the disassembly is easy, so that each floor is thinner (generally between 20 and 30 mm) and lighter in weight, and the main materials are generally nonmetallic materials such as composite boards, glass fiber reinforced plastics and the like or aluminum alloy materials; in the production process of the floor, the surface of the floor needs to be subjected to drying and dust removal treatment to carry out the subsequent preplating process.

Such as Chinese patent publication No.: an improved plate drying chamber of CN205192152U, the utility model adopts the technical scheme that: the utility model discloses a plate drying chamber, which comprises a drying chamber main body, a conveyor belt, a conveying roller, a heat transmission pipe and an air outlet pipe, and has the advantages that: the drying chamber has a simple structure, is recycled after filtering and dedusting the used gas, and is beneficial to saving resources and protecting the environment.

In order to solve the problem that the drying gas is difficult to treat, the prior art adopts a mode of setting a filter device for recycling, but the problems that the plate cannot be turned over automatically, only one plate can be dried at a time, dust is easy to blow into a drying chamber by a fan, further the plate is dried and ash is not thoroughly removed, when the plate is produced in a large scale, one piece of processing is wasted in time, the drying chamber is difficult to clean after ash is deposited, and equipment is easy to fly out to pollute the environment can also occur.

Disclosure of Invention

The utility model aims to provide a drying and dedusting device for cab floor production, which aims to solve the problems in the background technology.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a cab floor production is with stoving dust collector, includes the box main part, the box main part is including pedestal, upper box and slewer case, the left and right sides symmetry of pedestal is provided with conveyer, inner chamber one side of box main part is provided with drying device, the inner chamber opposite side of box main part is provided with ash removal device, conveyer's top is provided with the panel, fixed mounting has slewer in the inner chamber of slewer case, slewer's surface equidistant fixed mounting has clamping device, one side of drying device is provided with circulating device;

the rotary device comprises a limiting boss, a driving wheel, an inner rack and an outer rack, wherein the limiting boss is fixedly arranged on the inner wall of the rotary device box;

the clamping device comprises a mounting seat, a telescopic shaft cylinder, a hydraulic telescopic shaft, a clamp seat and a clamp, wherein the mounting seat is fixedly arranged on the outer surfaces of the inner rack and the outer rack at equal intervals;

the circulating device comprises an exhaust fan, an exhaust fan fence, a filtering box and an exhaust pipe, wherein the exhaust fan is embedded and installed at the top of the pedestal.

The technical scheme of the utility model is further improved as follows: the drying device comprises a pedestal, a top box, a front box, a rear box, a rotary device box and a concave table structure, wherein the top of the pedestal is symmetrically provided with a through drying device mounting groove;

by adopting the technical scheme, the circulating device is arranged between the drying device and the ash removing device, and ash-carrying gas generated on two sides can be furthest pumped away.

The technical scheme of the utility model is further improved as follows: the conveying device comprises a conveying belt hub and a conveying belt, wherein the conveying belt hubs are symmetrically arranged at two sides of the pedestal at equal intervals, the conveying belt is sleeved on the outer surface of the conveying belt hub, and the conveying device is arranged at two sides of the rotating device;

by adopting the technical scheme, the conveying device can convey the plate to one side of the turning device, and the plate is separated from the conveying belt after being clamped by the clamping device.

The technical scheme of the utility model is further improved as follows: the number of the turning devices is two, limiting shafts are fixedly arranged on the left side and the right side of each limiting boss, the driving wheels are symmetrically sleeved on the limiting shafts, the inner tooth bars are sleeved on the outer surfaces of the limiting bosses and the driving wheels, tooth tops of the driving wheels are in meshed connection with teeth of the inner rack, the outer tooth bars are sleeved on the outer ring of the inner rack, and screw holes are formed in the outer surfaces of the inner rack and the outer rack at equal intervals;

by adopting the technical scheme, the clamping device is fixed on the track between the inner rack and the outer rack, and the inner rack is controlled to step by step through the rotation of the driving wheel, so that the advancing and turning of the clamping device are realized.

The technical scheme of the utility model is further improved as follows: the clamping devices are arranged in a plurality of groups, the mounting seats are fixedly arranged in screw holes of the inner racks and the outer racks through screws, the telescopic shaft cylinder is embedded and arranged on the outer surface of the mounting seat, the telescopic shaft cylinder is arranged between the inner racks and the outer racks, the hydraulic telescopic shaft is embedded and arranged in a shaft hole of the telescopic shaft cylinder, the clamp seat is fixedly arranged on one side of the hydraulic telescopic shaft, the inner wall of the clamp seat is provided with a limiting groove, and the clamps are symmetrically arranged in the limiting groove;

by adopting the technical scheme, the clamp seat stretches out due to the hydraulic telescopic shaft after moving to a proper position, and the clamp moves along the limit groove of the clamp seat to fold and clamp the plate.

The technical scheme of the utility model is further improved as follows: the drying device comprises an electric heating box, a lower nozzle holder, air ducts, an upper nozzle holder and spray heads, wherein the electric heating box is fixedly arranged on one side of the bottom of an inner cavity of a pedestal, air outlets are symmetrically formed in one side and the upper surface of the electric heating box, air inlets are formed in the other side of the electric heating box, the lower nozzle holder is embedded into a drying device mounting groove formed in the top of the pedestal, the bottom of the lower nozzle holder is fixedly provided with the air ducts, the air ducts of the lower nozzle holder are embedded into the air outlets formed in the top of the electric heating box, the top of the lower nozzle holder is provided with nozzle mounting holes at equal intervals, one end of each air duct is embedded into the air outlet formed in the side surface of the electric heating box, the upper nozzle holder is embedded into a drying device mounting groove formed in the top of the upper box, and the other end of each air duct is embedded into one side surface of the upper nozzle holder;

by adopting the technical scheme, the drying device uniformly sprays heated drying gas onto the outer surfaces of the plates, and carries out omnibearing drying treatment on a plurality of groups of plates.

The technical scheme of the utility model is further improved as follows: the exhaust fan is embedded in an air suction hole formed in the top of the pedestal, the exhaust fan fence is fixedly arranged at the top of the exhaust fan, the filter box is fixedly arranged at the bottom of an inner cavity of the pedestal, a through air inlet hole is formed in the top of the filter box, the bottom of the exhaust fan is embedded in the air suction hole, the filter box is arranged on one side of the electric heating box, a through air outlet hole is formed in one side surface of the filter box, one end of the exhaust pipe is embedded in the air outlet hole of the filter box, and the other end of the exhaust pipe is embedded in the air inlet hole of the electric heating box;

by adopting the technical scheme, water is filled in the filter box, the bottom of the exhaust fan is immersed in the water, and the extracted ash-carrying gas is introduced into the water for ash filtration and returned to the drying device for reuse through the exhaust pipe.

The technical scheme of the utility model is further improved as follows: the ash removal device comprises a fan frame and a fan, wherein the outer surface of the fan frame is provided with fan mounting holes at equal intervals, the fan is embedded in the fan mounting holes of the fan frame, one part of the fan frame is symmetrically and fixedly arranged on a concave table mechanism of the pedestal, and the other part of the fan frame is symmetrically and fixedly arranged on the inner wall of the upper box body;

by adopting the technical scheme, the multi-group ash removal device ensures the thoroughly of ash removal work, and the fan machine faces the air outlet inside the equipment to prevent the drying gas from leaking out of the equipment to cause pollution.

By adopting the technical scheme, compared with the prior art, the utility model has the following technical progress:

1. the utility model provides a drying and dust removing device for cab floor production, which can realize automatic turning of plates through a rotating device and a clamping device, so that no dead angle exists in drying and dust removing work.

2. The utility model provides a drying and dust removing device for cab floor production, which can realize that a plurality of groups of plates are simultaneously dried and ash removed through a rotating device and a plurality of groups of clamping devices, realize streamline production and save processing time.

3. The utility model provides a drying and dust removing device for cab floor production, which can suck drying gas with dust into a circulating device through the circulating device and a dust removing device, and the drying gas is filtered by liquid in a filter box and then returns to the drying device, so that the drying and dust removing device can be repeatedly utilized, saves energy and does not pollute the environment.

Drawings

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

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

FIG. 3 is a cross-sectional view of the utility model in operation;

FIG. 4 is a schematic diagram of a turning device according to the present utility model;

fig. 5 is a schematic structural view of a clamping device according to the present utility model.

In the figure: 1. a case body; 2. a transfer device; 3. a slewing device; 4. a clamping device; 5. a drying device; 6. a circulation device; 7. an ash removal device; 8. a sheet material; 11. a pedestal; 12. an upper case; 13. a slewing device box; 21. a conveyor belt hub; 22. a conveyor belt; 31. a limit boss; 32. a driving wheel; 33. an inner rack; 34. an outer rack; 41. a mounting base; 42. a telescopic shaft cylinder; 43. a hydraulic telescopic shaft; 44. a clamp seat; 45. a clamp; 51. an electric heating box; 52. a lower nozzle frame; 53. an air duct; 54. an upper nozzle frame; 55. a spray head; 61. an exhaust fan; 62. an exhaust fan fence; 63. a filter box; 64. an exhaust pipe; 71. a fan frame; 72. a fan machine.

Detailed Description

The utility model is further illustrated by the following examples:

example 1

As shown in fig. 1-5, the utility model provides a drying and dedusting device for cab floor production, which comprises a box body 1, wherein the box body 1 comprises a pedestal 11, an upper box body 12 and a rotating device box 13, one side of the top of the pedestal 11 is symmetrically provided with a through drying device mounting groove, one side of the drying device mounting groove is provided with a through exhaust hole, one side of the exhaust hole is provided with a concave table structure, the upper box body 12 is fixedly arranged at the top of the pedestal 11, the top of the upper box body 12 is symmetrically provided with the through drying device mounting groove, the front side and the rear side of the upper box body 12 are provided with the through rotating device mounting grooves, the quantity of the rotating device boxes 13 is two groups, the rotating device boxes 13 are fixedly arranged in the rotating device mounting grooves, and a circulating device 6 is arranged between the drying device 5 and the ash removing device 7 and can furthest remove ash-carrying gas generated at two sides;

the conveying devices 2 are symmetrically arranged on the left side and the right side of the pedestal 11, the top of the conveying devices 2 is provided with the plates 8, the conveying devices 2 comprise conveying belt hubs 21 and conveying belts 22, the conveying belt hubs 21 are symmetrically arranged on the two sides of the pedestal 11 at equal intervals, the conveying belts 22 are sleeved on the outer surfaces of the conveying belt hubs 21, the conveying devices 2 are arranged on the two sides of the turning device 3, the conveying devices 2 can transport the plates 8 to one side of the turning device 3, and the plates are clamped by the clamping devices 4 and separated from the conveying belts 22;

the drying device 5 is arranged on one side of the inner cavity of the box body 1, the drying device 5 comprises an electric heating box 51, a lower spray head frame 52, an air duct 53, an upper spray head frame 54 and a spray head 55, the electric heating box 51 is fixedly arranged on one side of the bottom of the inner cavity of the pedestal 11, air outlets are symmetrically formed in one side and the upper surface of the electric heating box 51, an air inlet hole is formed in the other side of the electric heating box 51, the lower spray head frame 52 is embedded in a drying device mounting groove formed in the top of the pedestal 11, the air duct of the lower spray head frame 52 is fixedly arranged at the bottom of the lower spray head frame 52, the air duct of the lower spray head frame 52 is embedded in an air outlet hole formed in the top of the electric heating box 51, the top of the lower spray head frame 52 is provided with nozzle mounting holes at equal intervals, one end of the air duct 53 is embedded in the air outlet hole formed in the side of the electric heating box 51, the upper spray head frame 54 is embedded in the drying device mounting groove formed in the top of the upper box 12, the other end of the air duct 53 is embedded in one side of the upper spray head 54, the spray head 55 is embedded in the lower spray head frame 52 and the drying device mounting groove formed in the upper spray head 54, the heated drying device mounting groove is uniformly arranged on the outer surface of the plate 8, and the plate 8 is subjected to all-round drying treatment;

the other side of the inner cavity of the box body 1 is provided with an ash removing device 7, the ash removing device 7 comprises a fan frame 71 and a fan 72, the outer surface of the fan frame 71 is provided with fan mounting holes at equal intervals, the fan 72 is embedded and mounted in the fan mounting holes of the fan frame 71, one part of the fan frame 71 is symmetrically and fixedly mounted on a concave table mechanism of the pedestal 11, the other part of the fan frame 71 is symmetrically and fixedly mounted on the inner wall of the upper box body 12, a plurality of groups of ash removing devices 7 ensure the thoroughly of ash removing work, the fan 72 faces to the air outlet inside the equipment, and the leakage of drying gas out of the equipment is prevented from polluting.

Example 2

As shown in fig. 1-5, on the basis of embodiment 1, the present utility model provides a technical solution: preferably, the inner cavity of the revolving device box 13 is fixedly provided with the revolving device 3, the revolving device 3 comprises a limiting boss 31, a driving wheel 32, an inner rack 33 and an outer rack 34, the limiting boss 31 is fixedly arranged on the inner wall of the revolving device box 13, the number of the revolving devices 3 is two, limiting shafts are fixedly arranged on the left side and the right side of the limiting boss 31, the driving wheel 32 is symmetrically sleeved on the limiting shafts, the inner rack 33 is sleeved on the outer surfaces of the limiting boss 31 and the driving wheel 32, tooth tops of the driving wheel 32 are in meshed connection with teeth of the inner rack 33, the outer rack 34 is sleeved on an outer ring of the inner rack 33, screw holes are formed in the outer surfaces of the inner rack 33 and the outer rack 34 at equal intervals, the clamping device 4 is fixed on a track between the inner rack 33 and the outer rack 34, and the inner rack 33 is controlled to step by the rotation of the driving wheel 32, so that the advancing and turning of the clamping device are realized;

the outer surface of the turning device 3 is fixedly provided with clamping devices 4 at equal intervals, each clamping device 4 comprises a mounting seat 41, a telescopic shaft cylinder 42, a hydraulic telescopic shaft 43, a clamp seat 44 and a clamp 45, the mounting seats 41 are fixedly arranged on the outer surfaces of the inner racks 33 and the outer racks 34 at equal intervals, the clamping devices 4 are in a plurality of groups, the mounting seats 41 are fixedly arranged in screw holes of the inner racks 33 and the outer racks 34 through screws, the telescopic shaft cylinder 42 is embedded and arranged on the outer surface of the mounting seat 41, the telescopic shaft cylinder 42 is arranged between the inner racks 33 and the outer racks 34, the hydraulic telescopic shaft 43 is embedded and arranged in a shaft hole of the telescopic shaft cylinder 42, the clamp seat 44 is fixedly arranged on one side of the hydraulic telescopic shaft 43, limiting grooves are formed in the inner wall of the clamp seat 44, the clamp 45 is symmetrically arranged in the limiting grooves, the clamp seat 44 extends out due to the hydraulic telescopic shaft 43 after moving to the proper positions, the clamp 45 moves along the limiting grooves of the clamp seat 44, and closes up the plate 8.

Example 3

As shown in fig. 1-5, on the basis of embodiments 1-2, the present utility model provides a technical solution: preferably, one side of the drying device 5 is provided with a circulating device 6, the circulating device 6 comprises an exhaust fan 61, an exhaust fan fence 62, a filter box 63 and an exhaust pipe 64, the exhaust fan 61 is embedded and installed at the top of the pedestal 11, the exhaust fan 61 is embedded and installed in an exhaust hole at the top of the pedestal 11, the exhaust fan fence 62 is fixedly installed at the top of the exhaust fan 61, the filter box 63 is fixedly installed at the bottom of an inner cavity of the pedestal 11, the top of the filter box 63 is provided with a through air inlet hole, the bottom of the exhaust fan 61 is embedded and installed in the exhaust hole, the filter box 63 is arranged at one side of the electric heating box 51, one end of the exhaust pipe 64 is embedded and installed in the air outlet hole of the filter box 63, the other end of the exhaust pipe 64 is embedded and installed in the air inlet hole of the electric heating box 51, the filter box 63 is filled with water, the bottom of the exhaust fan is submerged, and the extracted ash-carrying gas is introduced into water to filter ash and returns to the drying device 5 through the exhaust pipe 64 for recycling.

The working principle of the drying and dust removing device for producing the cab floor is specifically described below.

As shown in fig. 1-5, the plate 8 is placed on the conveyor belt 22, the conveyor belt hub 21 drives the conveyor belt 22 to step, the plate 8 is transported to the side of the rotary device 3, the hydraulic telescopic shaft 43 stretches, the clamp seat 44 pops up, the clamp 45 moves along the limiting groove, the plate 8 is clamped forward in a gathering manner, the driving wheel 32 rotates to drive the inner rack 33 to step, the inner rack 33 drives the mounting seat 41 to move, the plate 8 clamped by the clamp 45 is changed from being horizontally placed to being vertically placed, the hanging turn-over is realized, the electric heating box 51 works, the drying gas is pressed into the lower spray head frame 52 and the upper spray head frame 54 through the gas guide pipe 53, the surface of the plate 8 is dried through the spray head 55, the exhaust fan 61 works, the ash carrying gas is sucked into the water of the filter box 63, the ash carrying gas is filtered by the water, the gas is returned to the electric heating box 51 through the exhaust pipe 64, the cyclic utilization is realized, the fan 72 works, the ash carrying operation is carried out on the plate 8, after the ash carrying is finished, the clamping device 4 relaxes, the plate 8 is discharged onto the conveyor belt 22 at the other end of the pedestal 11, and the water-flowing type plate drying ash carrying operation is realized.

The foregoing utility model has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.

Claims (8)

1. The utility model provides a drying dust collector is used in cab floor production, is applicable to the stoving dust collector on cab floor, including box main part (1), box main part (1) is including pedestal (11), last box (12) and slewer case (13), the left and right sides symmetry of pedestal (11) is provided with conveyer (2), inner chamber one side of box main part (1) is provided with drying device (5), the inner chamber opposite side of box main part (1) is provided with ash removal device (7), the top of conveyer (2) is provided with panel (8), its characterized in that: a rotating device (3) is fixedly arranged in the inner cavity of the rotating device box (13), clamping devices (4) are fixedly arranged on the outer surface of the rotating device (3) at equal intervals, and a circulating device (6) is arranged on one side of the drying device (5);

the rotary device (3) comprises a limiting boss (31), a driving wheel (32), an inner gear (33) and an outer gear (34), wherein the limiting boss (31) is fixedly arranged on the inner wall of the rotary device box (13);

the clamping device (4) comprises a mounting seat (41), a telescopic shaft cylinder (42), a hydraulic telescopic shaft (43), a clamp seat (44) and a clamp (45), wherein the mounting seat (41) is fixedly arranged on the outer surfaces of the inner rack (33) and the outer rack (34) at equal intervals;

the circulating device (6) comprises an exhaust fan (61), an exhaust fan fence (62), a filtering box (63) and an exhaust pipe (64), and the exhaust fan (61) is embedded and installed at the top of the pedestal (11).

2. The drying and dust removing device for cab floor production according to claim 1, wherein: the drying device mounting groove that link up has been seted up to top one side symmetry of pedestal (11), the updraft ventilator that link up has been seted up to one side of drying device mounting groove, one side of updraft ventilator is provided with concave station structure, go up box (12) fixed mounting at the top of pedestal (11), the drying device mounting groove that link up has been seted up to the top symmetry of going up box (12), the slewer mounting groove that link up has been seted up to the front and back side of going up box (12), the quantity of slewer case (13) is two sets of, slewer case (13) fixed mounting is in the slewer mounting groove.

3. The drying and dust removing device for cab floor production according to claim 1, wherein: the conveying device (2) comprises a conveying belt hub (21) and a conveying belt (22), the conveying belt hubs (21) are symmetrically arranged on two sides of the pedestal (11) at equal intervals, the conveying belt (22) is sleeved on the outer surface of the conveying belt hubs (21), and the conveying device (2) is arranged on two sides of the rotating device (3).

4. The drying and dust removing device for cab floor production according to claim 2, wherein: the number of the turning devices (3) is two, limiting shafts are fixedly mounted on the left side and the right side of each limiting boss (31), each driving wheel (32) is symmetrically sleeved on each limiting shaft, each inner tooth strip (33) is sleeved on the outer surface of each limiting boss (31) and each driving wheel (32), tooth tops of the driving wheels (32) are meshed with teeth of each inner tooth strip (33), each outer tooth strip (34) is sleeved on the outer ring of each inner tooth strip (33), and screw holes are formed in the outer surfaces of the corresponding inner tooth strips (33) and the corresponding outer tooth strips (34) at equal intervals.

5. The drying and dust removing device for cab floor production according to claim 4, wherein: the clamping device is characterized in that the clamping devices (4) are arranged in multiple groups, the mounting seats (41) are fixedly mounted in screw holes of the inner racks (33) and the outer racks (34) through screws, the telescopic shaft barrels (42) are embedded and mounted on the outer surfaces of the mounting seats (41), the telescopic shaft barrels (42) are arranged between the inner racks (33) and the outer racks (34), the hydraulic telescopic shafts (43) are embedded and mounted in shaft holes of the telescopic shaft barrels (42), the clamp base (44) is fixedly mounted on one side of the hydraulic telescopic shafts (43), limit grooves are formed in the inner walls of the clamp base (44), and the clamps (45) are symmetrically arranged in the limit grooves.

6. The drying and dust removing device for cab floor production according to claim 2, wherein: drying device (5) are including electric heating case (51), lower nozzle holder (52), air duct (53), go up shower nozzle holder (54) and shower nozzle (55), electric heating case (51) fixed mounting is in inner chamber bottom one side of pedestal (11), the venthole has been seted up to one side and the upper surface symmetry of electric heating case (51), the inlet port has been seted up to the opposite side of electric heating case (51), the drying device mounting groove at pedestal (11) top is installed in the embedding of lower nozzle holder (52), the bottom fixed mounting of lower nozzle holder (52) has the trachea, the trachea embedding of lower nozzle holder (52) is installed in the venthole at the top of electric heating case (51), the nozzle mounting hole has been seted up at equidistant at the top of lower nozzle holder (52), the one end embedding of air duct (53) is installed in the venthole of the side of upper box (12), the other end embedding of air duct (53) is installed in the drying device mounting groove at the side of upper nozzle holder (54), the shower nozzle holder (54) is installed in the drying device of lower nozzle holder (55).

7. The drying and dust removing device for cab floor production according to claim 6, wherein: exhaust fan (61) embedding is installed in the exhaust hole at pedestal (11) top, exhaust fan fence (62) fixed mounting is at the top of exhaust fan (61), rose box (63) fixed mounting is in the inner chamber bottom of pedestal (11), the inlet port that link up has been seted up at the top of rose box (63), the bottom embedding of exhaust fan (61) is installed in the exhaust hole, rose box (63) set up in one side of electric heating case (51), the venthole that link up has been seted up on one side of rose box (63), the one end embedding of blast pipe (64) is installed in the venthole of rose box (63), the other end embedding of blast pipe (64) is installed in the inlet port of electric heating case (51).

8. The drying and dust removing device for cab floor production according to claim 2, wherein: the ash removal device (7) comprises a fan frame (71) and a fan (72), wherein fan mounting holes are formed in the outer surface of the fan frame (71) at equal intervals, the fan (72) is embedded into the fan mounting holes of the fan frame (71), one part of the fan frame (71) is symmetrically and fixedly mounted on a concave mechanism of the pedestal (11), and the other part of the fan frame (71) is symmetrically and fixedly mounted on the inner wall of the upper box body (12).