CN114054145B

CN114054145B - Highly integrated flour production system

Info

Publication number: CN114054145B
Application number: CN202111352032.4A
Authority: CN
Inventors: 陈茂玲; 陈新国; 王诗杰; 江建民
Original assignee: Shandong Luchun Flour Co ltd
Current assignee: Shandong Luchun Flour Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2023-03-28
Anticipated expiration: 2041-11-16
Also published as: CN114054145A

Abstract

The invention relates to the technical field of flour production, in particular to a highly integrated flour production system which comprises a box body, wherein a feed inlet is formed in the outer wall of the top of the box body, a feed pipe is fixedly connected to the inner wall of the circumference of the feed inlet, the cross section of the feed pipe is of a broken line type, a material distribution assembly is arranged in the box body and is positioned right below the feed pipe, a drying assembly is arranged on the outer wall of one side of the box body, and a fixing frame is fixedly connected to the outer wall of one side of the box body.

Description

Highly integrated flour production system

Technical Field

The invention relates to the technical field of flour production, in particular to a highly integrated flour production system.

Background

Flour is a powder ground from wheat. According to the content of protein in the flour, the flour can be divided into high gluten flour, medium gluten flour, low gluten flour and non-gluten flour. Flour (wheat flour) is staple food in most areas in the north of China, and foods made of the flour are various in variety, various in pattern and different in flavor.

The patent document with the publication number of CN206778536U discloses flour production equipment, which comprises a tank body, wherein a feed inlet is formed in the upper end in the tank body, mounting blocks fixed on the inner wall of the tank body are arranged at the lower end of the feed inlet, a blanking channel communicated with the feed inlet is formed in the space between the mounting blocks, a first flour milling stick, a second flour milling stick, a third flour milling stick and a fourth flour milling stick are arranged in the blanking channel in a staggered mode from top to bottom, and the adjacent two flour milling sticks are in mutual contact; the internal fixed horizontally crocus dish that is provided with of jar of installation piece below, be provided with the blanking mouth that link up from top to bottom on the crocus dish, installation piece lower extreme is provided with the stock guide that extends to blanking mouth top. Above-mentioned patent is grinding the in-process of grinding to powder to the wheat to first crocus rod, second crocus rod, third crocus rod and fourth crocus rod carry out discontinuous clearance edulcoration, lead to a crocus rod easily, second crocus rod, third crocus rod and fourth crocus rod to appear blocking the machine and lead to the condition of work efficiency greatly reduced to take place at the in-process of long-time operation, can lead to the whole great trouble of appearing of device when serious. Therefore, a highly integrated flour production system is needed to solve the above problems.

Disclosure of Invention

The present invention is directed to a highly integrated flour production system to solve the problems of the background art as described above.

The technical scheme of the invention is as follows: the utility model provides a highly integrated flour production system, includes the box, the feed inlet has been seted up to the top outer wall of box, the circumference inner wall fixedly connected with inlet pipe of feed inlet, the cross section of inlet pipe is the broken line type, the inside of box is provided with divides the material subassembly, divide the material subassembly to be located under the inlet pipe, one side outer wall of box is provided with the stoving subassembly, one side outer wall fixedly connected with mount of box, one side outer wall fixedly connected with down tube of mount, the one end fixedly connected with second motor of down tube, the output shaft one end fixedly connected with grinding roller of second motor, the figure of grinding roller is two sets of, and is two sets of grinding roller intermeshing, the equal fixedly connected with connecting plate of both sides inner wall of box, the connecting plate is kept away from one side fixedly connected with collection material frame of box, the frame that gathers materials is located two sets of grinding roller is under, the bottom of box is provided with the correct grinding subassembly, one side outer wall of box is provided with chamber door and control panel respectively.

Preferably, divide the material subassembly to include fixed connection in the first mounting panel of box top inner wall, one side plug-in connection of first mounting panel has the rotation post, the one end fixedly connected with baffle of rotation post, the bottom fixedly connected with branch flitch of baffle, divide the flitch, the rotation post is kept away from the spacing dish of one end fixedly connected with of baffle, one side of first mounting panel is provided with spacing subassembly.

Preferably, the material distribution plate comprises two groups of inclined plates and two groups of convex plates, the convex plates are positioned in the middle of the two groups of inclined plates, sieve holes distributed equidistantly are formed in the tops of the two groups of inclined plates respectively, and the specifications of the sieve holes are gradually increased from one end close to the convex plates to one end far away from the convex plates.

Preferably, the limiting assembly comprises a connecting rod fixedly connected to the outer wall of the circumference of the rotating column, a limiting ring is fixedly connected to the outer wall of one side of the first mounting plate, and one end of the connecting rod penetrates through the limiting ring.

Preferably, the drying assembly comprises a fixed seat fixedly connected to the outer wall of one side of the box body, an air blower is fixedly connected to one side of the fixed seat, a heating box is connected to one side of the air blower through a pipeline, resistance wires are arranged on the inner walls of the two sides of the heating box, an air inlet pipe is connected to the top of the heating box in an inserted mode, a connecting pipe is connected to one end of the air inlet pipe in an inserted mode, and air outlet hoppers distributed equidistantly are connected to the outer wall of the circumference of the connecting pipe in an inserted mode.

Preferably, baffles are fixedly connected to the inner walls of the two sides of the box body, one end, far away from the interior of the box body, of each baffle is located above the grinding roller, a groove is formed in the top of each baffle, a collecting vessel is fixedly connected to the inner wall of one side of the box body, and the collecting vessel is located under the groove.

Preferably, the fine grinding assembly comprises a first motor fixedly connected to the inner wall of the bottom of the box body, a grinding head is fixedly connected to one end of an output shaft of the first motor, a lifting assembly is fixedly connected to the inner wall of the bottom of the box body, a grinding groove is fixedly connected to one side of the lifting assembly, one end of the grinding head is located inside the grinding groove, a feed hopper is arranged at the top of the grinding groove, a discharge groove is formed in the bottom of the material collecting frame, and the discharge groove is located right above the feed hopper.

Preferably, the lifting assembly comprises an electric push rod fixedly connected to the inner wall of the bottom of the box body, a fixed disc is fixedly connected to one end of the electric push rod, and the grinding groove is fixedly connected with the fixed disc.

Preferably, one side outer wall of baffle is provided with clean subassembly, clean subassembly includes fixed connection and is in the horizontal pole of baffle one side, one side of horizontal pole is provided with the slip subassembly, one side fixedly connected with stiffener of slip subassembly, the one end fixedly connected with second mounting panel of stiffener, one side of second mounting panel is rotated and is connected with the driving roller, the clean cover has been cup jointed to the circumference outer wall of driving roller.

Preferably, the sliding assembly comprises a sliding groove formed in one side of the cross rod, a telescopic rod is fixedly connected to the inner wall of one side of the sliding groove, sliding blocks are connected to the inner walls of the two sides of the sliding groove in a sliding mode, one end of the reinforcing rod is fixedly connected to the outer wall of one side of each sliding block, and springs are sleeved on the outer wall of the circumference of the telescopic rod.

The invention provides a highly integrated flour production system through improvement, compared with the prior art, the invention has the following improvement and advantages:

one is as follows: according to the wheat flour milling machine, due to the arrangement of the material distributing assembly, when people grind wheat, workers firstly add the wheat into the box body through the material inlet pipe, the wheat added into the box body can firstly fall on the top of the material distributing plate, the material distributing plate is composed of the two groups of inclined plates and the convex plates, the wheat falling on the material distributing plate can fall along sieve holes formed in the top of the material distributing plate, and meanwhile, the specification of the sieve holes is gradually increased from one end close to the convex plates to one end far away from the convex plates, so that the wheat can uniformly fall, and the subsequent deep processing of the wheat is facilitated;

and the second step is as follows: according to the wheat flour mill, the air blower and the resistance wire are started in the falling process of wheat through the arranged drying assembly and the collecting vessel, the resistance wire heats hot air generated by the air blower and blows the hot air into the box body, so that the falling wheat can be dried, the phenomenon of agglomeration caused by overhigh humidity of the wheat in the subsequent flour milling process is avoided, meanwhile, the wheat uniformly falls through the material distributing assembly, so that the wheat can be uniformly dried, impurities in the wheat can be rapidly blown out in the air blowing drying process of the wheat, and the integral cleanliness of the wheat can be guaranteed;

and the third step: through the fine grinding assembly and the lifting assembly, after the wheat is ground into powder by the grinding roller, the wheat falls into the feed hopper and the grinding groove, at the moment, a worker starts the first motor, the first motor drives the grinding head to rotate so as to perform fine grinding on the flour, and in the process of performing fine grinding, the worker adjusts the height of the grinding groove by starting the lifting assembly, so that the grinding degree of the flour can be adjusted;

and the fourth step: through the clean subassembly that sets up, at the in-process that the grinding roller ground wheat, the grinding roller can contact with clean cover, can reject the card fast at the inside wheat of grinding roller through clean cover, has guaranteed the subsequent grinding efficiency of grinding roller, can also effectually avoid the wheat to fall into the inside condition of box when not grinding through driving roller and clean cover simultaneously and take place, plays good effect that blocks.

Drawings

The invention is further explained below with reference to the figures and examples:

FIG. 1 is a schematic view of the internal structure of the case of the present invention;

FIG. 2 is a schematic view of the back structure of the case of the present invention;

FIG. 3 is a schematic sectional view of the case of the present invention;

FIG. 4 is an enlarged schematic view of the dispensing assembly of the present invention;

FIG. 5 is an enlarged schematic view of the structure at the point A;

FIG. 6 is a schematic side view of the case of the present invention;

FIG. 7 is a schematic view of the overall structure of the cleaning assembly of the present invention;

fig. 8 is an enlarged schematic view of the invention at B.

Description of reference numerals:

1. a box body; 2. a feeding pipe; 3. screening holes; 4. a groove; 5. a baffle plate; 6. a collection vessel; 7. a discharge chute; 8. a material collecting frame; 9. a feed hopper; 10. a grinding groove; 11. a grinding head; 12. a first motor; 13. an electric push rod; 14. fixing the disc; 15. a connecting plate; 16. a fixed seat; 17. a blower; 18. grinding the roller; 19. a heating box; 20. an air inlet pipe; 21. a connecting pipe; 22. an air outlet hopper; 23. a partition plate; 24. a control panel; 25. a fixed mount; 26. a second motor; 27. a material distributing plate; 28. a first mounting plate; 29. a connecting rod; 30. a limiting ring; 31. rotating the column; 32. a limiting disc; 33. a box door; 34. a resistance wire; 35. a second mounting plate; 36. cleaning the sleeve; 37. a chute; 38. a telescopic rod; 39. a cross bar; 40. a spring; 41. a slider; 42. a reinforcing rod; 43. and (5) driving rollers.

Detailed Description

The present invention is described in detail below, and technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The invention provides a highly integrated flour production system through improvement, and the technical scheme of the invention is as follows:

as shown in fig. 1-6, a highly integrated flour production system, including box 1, the top outer wall of box 1 has been seted up the feed inlet, the circumference inner wall fixedly connected with inlet pipe 2 of feed inlet, the cross section of inlet pipe 2 is the broken line type, the inside of box 1 is provided with divides the material subassembly, divide the material subassembly to be located inlet pipe 2 under, one side outer wall of box 1 is provided with the drying assembly, one side outer wall fixedly connected with mount 25 of box 1, one side outer wall fixedly connected with down tube of mount 25, the one end fixedly connected with second motor 26 of down tube, the output shaft one end fixedly connected with grinding rolls 18 of second motor 26, the figure of grinding rolls 18 is two sets of, two sets of grinding rolls 18 intermeshing, the equal fixedly connected with connecting plate 15 of both sides inner wall of box 1, one side fixedly connected with collection frame 8 that box 1 was kept away from to connecting plate 15, collection frame 8 is located two sets of grinding rolls 18 under, the bottom of box 1 is provided with the fine grinding assembly, one side outer wall of box 1 is provided with chamber door 33 and control panel 24 respectively.

Further, divide the material subassembly to include fixed connection at the first mounting panel 28 of box 1 top inner wall, one side plug-in connection of first mounting panel 28 has the rotation post 31, rotates the one end fixedly connected with baffle 23 of post 31, and the bottom fixedly connected with of baffle 23 divides flitch 27, rotates the one end fixedly connected with spacing dish 32 that the baffle 23 was kept away from to post 31, and one side of first mounting panel 28 is provided with spacing subassembly.

Further, divide flitch 27 to include hang plate and flange, the figure of hang plate is two sets of, the flange is located the middle part of two sets of hang plates, sieve mesh 3 that the equidistance distributes is seted up respectively at the top of two sets of hang plates, sieve mesh 3's specification is crescent from the one end that is close to the flange to the one end of keeping away from the flange, carry out the crocus during operation to wheat at people, the staff is at first with wheat through inlet pipe 2 add to 1 insides of box, the inside wheat of adding 1 of box can at first fall at the top of dividing flitch 27, and divide flitch 27 to constitute through two sets of hang plates and flange, the wheat that falls on dividing flitch 27 can fall down along with sieve mesh 3 that divides flitch 27 top to set up, the specification of sieve mesh 3 is crescent from the one end that is close to the flange simultaneously, consequently, can make the even whereabouts of wheat, the follow-up deep-processing to wheat has been made things convenient for.

Further, spacing subassembly includes fixed connection at the connecting rod 29 of rotating the circumference outer wall of post 31, one side outer wall fixed connection of first mounting panel 28 has spacing ring 30, and the one end of connecting rod 29 passes from the inside of spacing ring 30, can avoid dividing flitch 27 rotation range too big condition to take place through spacing ring 30.

Further, the stoving subassembly includes the fixing base 16 of fixed connection at box 1 one side outer wall, one side fixedly connected with air-blower 17 of fixing base 16, there is heating cabinet 19 one side of air-blower 17 through the pipe connection, heating cabinet 19's both sides inner wall all is provided with resistance wire 34, it has air-supply line 20 to peg graft at heating cabinet 19's top, it has connecting pipe 21 to peg graft in air-supply line 20's one end, peg graft the air-out fill 22 that has the equidistance and distribute of connecting pipe 21's circumference outer wall, start air-blower 17 and resistance wire 34 at the in-process of wheat whereabouts, resistance wire 34 heats and blows in inside box 1 with the hot-blast that air-blower 17 produced, from can carrying out drying process to the wheat of whereabouts, avoid follow-up crocus in-process because the too big condition that leads to the caking of wheat humidity takes place, simultaneously wheat is through dividing the even whereabouts of material subassembly and consequently can carry out even stoving to it.

Further, the equal fixedly connected with baffle 5 of both sides inner wall of box 1, baffle 5 keeps away from the inside one end of box 1 and is located the top of grinding roller 18, recess 4 has been seted up at the top of baffle 5, utensil 6 is collected to one side inner wall fixedly connected with of box 1, it is located recess 4 to collect utensil 6 under, can also blow off the impurity in the wheat rapidly to the in-process that the wheat blast air was dried, make impurity fall into the inside of collecting utensil 6, thereby can guarantee the holistic cleanliness factor of wheat.

Further, the correct grinding subassembly includes first motor 12 of fixed connection at 1 bottom inner wall of box, the output shaft one end fixedly connected with grinding head 11 of first motor 12, the bottom inner wall fixedly connected with lifting unit of box 1, one side fixedly connected with of lifting unit grinds groove 10, the one end of grinding head 11 is located the inside of grinding groove 10, the top of grinding groove 10 is provided with feeder hopper 9, discharge chute 7 has been seted up to the bottom of frame 8 that gathers materials, discharge chute 7 is located feeder hopper 9 directly over, can fall into feeder hopper 9 and grinding groove 10 inside after the wheat is ground into powder through grinding roller 18, the staff starts first motor 12 this moment, first motor 12 drives grinding head 11 and rotates and can carry out the correct grinding processing to the face powder.

Further, lifting unit includes electric putter 13 of fixed connection at 1 bottom inner wall of box, and electric putter 13's one end fixedly connected with fixed disk 14 grinds groove 10 and fixed disk 14 formation fixed connection, and is carrying out the in-process that finely grinds processing, and the staff adjusts the height of grinding groove 10 through starting lifting unit to can adjust the grinding degree of flour.

Example 2

As shown in fig. 7-8, a highly integrated flour production system, compare in embodiment 1, this embodiment still includes that one side outer wall of baffle 5 is provided with clean subassembly, clean subassembly includes fixed connection at the horizontal pole 39 of baffle 5 one side, one side of horizontal pole 39 is provided with the slip subassembly, one side fixedly connected with stiffener 42 of slip subassembly, the one end fixedly connected with second mounting panel 35 of stiffener 42, one side of second mounting panel 35 is rotated and is connected with driving roller 43, the circumference outer wall cup joints clean cover 36 of driving roller 43, in-process that grinding roller 18 ground the wheat, grinding roller 18 can contact with clean cover 36, can reject the wheat of card in grinding roller 18 inside fast through clean cover 36, the subsequent grinding efficiency of grinding roller 18 has been guaranteed, can also effectually avoid the wheat to fall into the inside condition of box 1 when not grinding through driving roller 43 and clean cover 36 simultaneously and take place, play good blocking effect.

Further, the slip subassembly is including seting up the spout 37 in horizontal pole 39 one side, one side inner wall fixedly connected with telescopic link 38 of spout 37, the equal sliding connection of both sides inner wall of spout 37 has slider 41, the one end fixed connection of stiffener 42 is on one side outer wall of slider 41, the circumference outer wall of telescopic link 38 has cup jointed spring 40, slip subassembly and spring 40 through setting up can make clean subassembly have certain elastic deformation ability, the stability of clean subassembly work has been guaranteed.

The working principle is as follows: when people grind wheat, workers firstly add the wheat into the box body 1 through the inlet pipe 2, the wheat added into the box body 1 firstly falls on the top of the material dividing plate 27, the material dividing plate 27 consists of two groups of inclined plates and convex plates, the wheat falling on the material dividing plate 27 falls along the sieve holes 3 arranged on the top of the material dividing plate 27, meanwhile, the specification of the sieve holes 3 is gradually increased from one end close to the convex plates to one end far away from the convex plates, so that the wheat can fall uniformly, the subsequent deep processing treatment of the wheat is facilitated, the air blower 17 and the resistance wire 34 are started in the process of wheat falling, the resistance wire 34 heats hot air generated by the air blower 17 and blows the hot air into the box body 1, the falling wheat can be dried, and the occurrence of caking caused by overhigh humidity of the wheat in the subsequent grinding process is avoided, meanwhile, the wheat can be uniformly dried by uniformly falling the material distribution component, impurities in the wheat can be rapidly blown out in the process of drying the wheat by blowing air, so that the integral cleanliness of the wheat can be ensured, the wheat can fall into the feed hopper 9 and the grinding groove 10 after being ground into powder by the grinding roller 18, at the moment, a worker starts the first motor 12, the first motor 12 drives the grinding head 11 to rotate so as to finely grind the flour, in the process of finely grinding, the worker adjusts the height of the grinding groove 10 by starting the lifting component so as to adjust the grinding degree of the flour, in the process of grinding the wheat by the grinding roller 18, the grinding roller 18 can be contacted with the cleaning sleeve 36, the wheat clamped in the grinding roller 18 can be rapidly removed by the cleaning sleeve 36, and the subsequent grinding efficiency of the grinding roller 18 is ensured, meanwhile, the driving roller 43 and the cleaning sleeve 36 can effectively prevent wheat from falling into the box body 1 when the wheat is not ground, and a good blocking effect is achieved.

The previous description is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A highly integrated flour production system which is characterized in that: the grinding device comprises a box body (1), a feed inlet is formed in the outer wall of the top of the box body (1), a feed inlet pipe (2) is fixedly connected to the inner wall of the circumference of the feed inlet, the cross section of the feed inlet pipe (2) is of a broken line type, a material distributing assembly is arranged inside the box body (1) and is located under the feed inlet pipe (2), a drying assembly is arranged on the outer wall of one side of the box body (1), a fixing frame (25) is fixedly connected to the outer wall of one side of the box body (1), an inclined rod is fixedly connected to the outer wall of one side of the fixing frame (25), a second motor (26) is fixedly connected to one end of the inclined rod, grinding rollers (18) are fixedly connected to one end of an output shaft of the second motor (26), the number of the grinding rollers (18) is two groups, the two groups of grinding rollers (18) are mutually meshed, a fine grinding connecting plate (15) is fixedly connected to the inner walls of the two sides of the box body (1), a material collecting frame (8) is fixedly connected to one side, which is far away from the box body (1), the fine grinding rollers (18) are located under the two groups of the grinding rollers (18), a fine grinding assembly (1), a control panel (33) is arranged at the bottom of the box body (1);

the material distribution component comprises a first mounting plate (28) fixedly connected to the inner wall of the top of the box body (1), one side of the first mounting plate (28) is connected with a rotating column (31) in an inserted manner, one end of the rotating column (31) is fixedly connected with a partition plate (23), the bottom of the partition plate (23) is fixedly connected with a material distribution plate (27), the material distribution plate (27), one end, far away from the partition plate (23), of the rotating column (31) is fixedly connected with a limiting disc (32), and one side of the first mounting plate (28) is provided with a limiting component;

the material distribution plate (27) comprises two groups of inclined plates and two groups of convex plates, the convex plates are positioned in the middle of the two groups of inclined plates, the tops of the two groups of inclined plates are respectively provided with sieve holes (3) distributed at equal intervals, and the specifications of the sieve holes (3) are gradually increased from one end close to the convex plates to one end far away from the convex plates;

the limiting assembly comprises a connecting rod (29) fixedly connected to the circumferential outer wall of the rotating column (31), a limiting ring (30) is fixedly connected to the outer wall of one side of the first mounting plate (28), and one end of the connecting rod (29) penetrates through the limiting ring (30);

the inner walls of two sides of the box body (1) are fixedly connected with baffle plates (5), one end, far away from the interior of the box body (1), of each baffle plate (5) is located above the grinding roller (18), a groove (4) is formed in the top of each baffle plate (5), a collecting vessel (6) is fixedly connected to the inner wall of one side of the box body (1), and the collecting vessel (6) is located right below the groove (4);

the fine grinding assembly comprises a first motor (12) fixedly connected to the inner wall of the bottom of the box body (1), one end of an output shaft of the first motor (12) is fixedly connected with a grinding head (11), the inner wall of the bottom of the box body (1) is fixedly connected with a lifting assembly, one side of the lifting assembly is fixedly connected with a grinding groove (10), one end of the grinding head (11) is located inside the grinding groove (10), a feed hopper (9) is arranged at the top of the grinding groove (10), a discharge groove (7) is formed in the bottom of the material collecting frame (8), and the discharge groove (7) is located right above the feed hopper (9);

the lifting assembly comprises an electric push rod (13) fixedly connected to the inner wall of the bottom of the box body (1), one end of the electric push rod (13) is fixedly connected with a fixed disc (14), and the grinding groove (10) is fixedly connected with the fixed disc (14);

a cleaning assembly is arranged on the outer wall of one side of the baffle plate (5), the cleaning assembly comprises a cross rod (39) fixedly connected to one side of the baffle plate (5), a sliding assembly is arranged on one side of the cross rod (39), a reinforcing rod (42) is fixedly connected to one side of the sliding assembly, one end of the reinforcing rod (42) is fixedly connected with a second mounting plate (35), a driving roller (43) is rotatably connected to one side of the second mounting plate (35), and a cleaning sleeve (36) is sleeved on the outer wall of the circumference of the driving roller (43);

the sliding assembly comprises a sliding groove (37) formed in one side of the cross rod (39), a telescopic rod (38) fixedly connected to the inner wall of one side of the sliding groove (37), sliding blocks (41) are slidably connected to the inner walls of the two sides of the sliding groove (37), one end of a reinforcing rod (42) is fixedly connected to the outer wall of one side of each sliding block (41), and a spring (40) is sleeved on the outer wall of the circumference of the telescopic rod (38).

2. A highly integrated flour production system according to claim 1, wherein: the drying component comprises a fixed seat (16) fixedly connected with the outer wall of one side of the box body (1), an air blower (17) fixedly connected with one side of the fixed seat (16), a heating box (19) is connected to one side of the air blower (17) through a pipeline, resistance wires (34) are arranged on the inner walls of two sides of the heating box (19), an air inlet pipe (20) is spliced at the top of the heating box (19), a connecting pipe (21) is spliced at one end of the air inlet pipe (20), and air outlet hoppers (22) distributed equidistantly are spliced on the outer wall of the circumference of the connecting pipe (21).