CN115191627A

CN115191627A - Roasting machine

Info

Publication number: CN115191627A
Application number: CN202210890055.9A
Authority: CN
Inventors: 任博; 包志宇
Original assignee: Ningbo Changrong Brewing Equipment Co ltd
Current assignee: Ningbo Changrong Brewing Equipment Co ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-10-18
Anticipated expiration: 2042-07-27
Also published as: CN115191627B

Abstract

The invention relates to the field of mechanical equipment, in particular to a roasting machine. A roaster comprising: the first hearth is arranged at one end of the roasting machine and is provided with an air outlet; the second hearth is arranged at the other end of the roasting machine, the second hearth is fixedly connected with the first hearth, and the second hearth is provided with an air inlet; the rotary drum is arranged in the first hearth and can rotate in the first hearth; the sieve sets up in one side that first furnace was kept away from to the rotary drum, and the hot-blast sieve and rotary drum that pass through in proper order that get into from the air intake flows from the air outlet again, and the roaster still includes, seal structure, will be separated by the intermediate layer space that the periphery of rotary drum and the interior week of first furnace pressed from both sides and air outlet. The roasting machine provided by the invention can reduce or even avoid the situation that the materials are driven by wind to flow out of the rotary drum from the interior of the rotary drum, so that the materials are prevented from being blocked in the roasting machine, and the production safety and the roasting effect of the roasting machine are effectively improved.

Description

Roasting machine

Technical Field

The invention relates to the field of mechanical equipment, in particular to a roasting machine.

Background

In the process steps of producing products such as soy sauce and the like, the materials need to be roasted. The baking can evaporate the water of the materials and expand the tissues to be in a state of easy crushing, thereby facilitating the subsequent crushing and yeast making. In addition, substances such as starch in the materials are gelatinized by roasting, so that the contents of fragrance and reducing sugar can be increased.

In the roasting process, a roasting machine is mostly adopted, the roasting machine is provided with a wind bath roasting machine and a sand bath roasting machine, the wind bath adopts a mode of introducing hot air to roast the materials, and the sand bath adopts a mode of heating sand. Because the sand is difficult to be completely separated from the materials, and the mode of the sand bath easily causes the materials to be heated unevenly to generate scorching, the air bath roasting machine is more and more widely used. The prior art roaster generally comprises a hearth and a rotary drum arranged in the hearth, and the materials are roasted in the rotary drum. A sieve plate is arranged below the rotary drum, and hot air enters the rotary drum through holes in the sieve plate. In the roasting process, the rotary drum rotates, the sieve plate is kept fixed, a gap is reserved between the rotary drum and the sieve plate, and an interlayer space is formed between the outer periphery of the rotary drum and the inner periphery of the hearth.

However, the scorching rate of the materials in the roasting machine in the prior art is always higher, and the roasting effect of the roasting machine is reduced.

Therefore, how to provide a roasting machine which can reduce the burnt rate of materials becomes a problem to be solved.

Disclosure of Invention

Aiming at the problem that the roasting machine in the prior art causes the burnt rate of the material to rise, the invention provides a roasting machine, which comprises: the first hearth is arranged at one end of the roasting machine and is provided with an air outlet; the second hearth is arranged at the other end of the roasting machine, the second hearth is fixedly connected with the first hearth, and the second hearth is provided with an air inlet; the rotary drum is arranged in the first hearth and can rotate in the first hearth; the sieve sets up in one side that first furnace was kept away from to the rotary drum, and the hot-blast sieve and rotary drum that pass through in proper order that get into from the air intake flows from the air outlet again, and the roaster still includes, seal structure, will be separated by the intermediate layer space that the periphery of rotary drum and the interior week of first furnace pressed from both sides and air outlet.

The inventors of the present application, after having made extensive studies, have first found that the increase in the scorch rate is associated with the leakage of the material, which is related to the pressure, and thus made the above improvement. According to the technical scheme, hot air enters the second hearth from the air inlet along the air inlet direction, enters the rotary drum through the sieve plate, and finally leaves the roasting machine from the air outlet along the air outlet direction. Because of the sealing structure, the pressure drop of hot air passing through the material makes the air pressure of the hot air in the rotary drum smaller than that of the material in the interlayer space, and the material is difficult to move to the interlayer space from the rotary drum. The phenomenon that the materials are stuck or even leaked out due to the fact that the hot air carries the materials to flow from the inside of the rotary drum to the outside of the rotary drum is avoided, so that the ignition probability and the scorching rate are reduced, and the safety of the roasting machine is improved.

Preferably, the sealing structure comprises: the metal ring mounting seat is arranged around the inner periphery of the first hearth; one end of the metal ring is fixed on the metal ring mounting seat, and the other end of the metal ring is abutted against the end part of the rotary drum.

According to the technical scheme, one end of the metal ring is fixedly connected with the metal ring mounting seat, and the other end of the metal ring is abutted to the rotary drum. Therefore, the metal ring can have certain deformation capacity, the metal ring can be matched with the periphery of the rotary drum when the rotary drum rotates, the interlayer space is sealed, friction between the metal ring and the rotary drum is reduced, and the service life of the sealing structure is prolonged.

Preferably, the metal ring clamping device further comprises an annular pressure plate arranged around the inner periphery of the metal ring mounting seat, and the outer periphery of the annular pressure plate and the metal ring mounting seat clamp the metal ring together.

According to the technical scheme, the annular pressing plate and the metal ring mounting seat clamp and fix the metal rings from two sides of the metal rings respectively, so that the metal rings are firmly and stably kept in connection with the metal ring mounting seat in the process of roasting materials by the roasting machine, and the sealing performance and the stability of the metal rings are improved.

Preferably, the first hearth is provided with a feeding port communicated with the rotary drum, and the second hearth is provided with a discharging port communicated with the rotary drum.

According to the technical scheme, the materials to be fried enter the roasting machine from the feeding port, and the feeding port is communicated with the rotary drum, so that the materials can fall into the rotary drum. Hot air enters the second hearth from the air inlet along the air inlet direction, penetrates through the sieve plate and enters the rotary drum, and under the action of hot air pressure, the material starts to boil in the rotary drum and rotates along with the rotary drum, so that the material is roasted. The discharge port is communicated with the rotary drum, and the materials are rotated to the position corresponding to the discharge port in the rotary drum and finally leave the roaster from the discharge port.

Preferably, the end of the rotating drum away from the first hearth has a prescribed gap with the screen plate.

According to the technical scheme, the rotary drum needs to rotate and the sieve plate keeps fixed in the roasting process, so that a specified gap is formed between the rotary drum and the sieve plate, and the damage to the rotary drum and the sieve plate caused by friction between the rotary drum and the sieve plate due to rotation of the rotary drum is avoided.

Preferably, the method further comprises the following steps: and the channel structure is used for communicating the inner space of the second hearth with the interlayer space.

According to the technical scheme, after hot air enters the second hearth, the hot air can enter the interlayer space from the channel structure, so that the wind pressure of the hot air in the second hearth is the same as that of the interlayer space. And because the wind pressure of the hot wind in the rotary drum is less than that of the second hearth, the materials are difficult to move to the interlayer space along with the hot wind from the rotary drum, so that the situation that the materials are clamped in a specified gap or move to the interlayer space is effectively avoided, the scorching rate of the materials is favorably reduced, and the safety of the roasting machine is improved.

Preferably, the channel structure is a communicating pipe, and the communicating pipe communicates the interlayer space with the inner space of the second hearth.

According to the technical scheme, the interlayer space is communicated with the inner space of the second hearth through the communicating pipe, so that the air pressure of hot air in the interlayer space is kept consistent with that of the second hearth, the materials in the rotary drum can be prevented from entering the interlayer space along with the hot air, and the safety of the roasting machine is improved.

Preferably, still include the solid fixed ring that encircles the setting in second furnace, gu fixed ring and sieve fixed connection have the clearance in order to constitute the channel structure between solid fixed ring and the second furnace.

According to the technical scheme, the fixing ring arranged on the second hearth in the surrounding mode can play a role in fixing the sieve plate, and the sieve plate is guaranteed to be stable in the roasting process. The fixed ring and the second hearth are provided with gaps to form a channel structure, so that the situation that materials are clamped in the specified gaps and enter the interlayer space is reduced and even avoided, the burnt rate of the materials is reduced, and the safety of the roasting machine is improved.

Drawings

Fig. 1 is a sectional view of a roaster according to an embodiment of the present invention.

FIG. 2 is a top view of a drum according to an embodiment of the present invention.

Fig. 3 is a top view of a screen panel according to an embodiment of the present invention.

Fig. 4 is an enlarged view at a of fig. 1.

Fig. 5 is an enlarged view at B of fig. 1.

Figure 6 is a cross-sectional view of a roaster according to some other embodiments of the present invention.

Reference numerals: 10, a hearth; 101 a first hearth; 102 a second hearth; 20 a rotating cylinder; 201; a partition plate; 202 a boiling chamber; 203 a bevel portion; 30 sieve plates; 301 a vent hole; 302 discharge holes; 40 a sealing structure; 401 a metal ring mount; 402 a metal ring; 403 an annular pressure plate; 50 air inlets; 51 air outlet; 52 a material inlet; 53, discharging a material outlet; a 60 bending part; 601 a first bending part; 602 a second bend; 61 a threaded hole; 70 gap width adjusting mechanism; 701 a first bolt; 702 a second bolt; 703 a nut; 80 fixing the ring; an 81 channel structure; 82, defining a gap; 83 communicating pipe; 90 interlayer space; a height direction; b a first wind direction; s circumferential direction; u air inlet direction; v air outlet direction; p1, first wind pressure; p2, second wind pressure; p3, third wind pressure; p4 fourth wind pressure; a a first position; b a second position; c third position.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, 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 embodiment provides a roasting machine, and fig. 1 is a sectional view of the roasting machine provided by the embodiment of the invention. As shown in fig. 1, the roaster includes a furnace 10, a rotating drum 20 disposed in the furnace 10 and capable of rotating within the furnace 10, and a screen 30.

In this embodiment, the furnace 10 includes a first furnace 101 disposed at the top of the roaster and a second furnace 102 disposed at the bottom of the roaster, and the first furnace 101 is fixedly connected to the second furnace 102. The top here means an upper position in the height direction a, and the bottom means a lower position in the height direction a.

The first chamber 101 is provided with an air outlet 51 and a material inlet 52, and the second chamber 102 is provided with an air inlet 50 and a material outlet 53. The material to be fried enters the roaster through the material inlet 52, and the rotating drum 20 rotates continuously during the process of the material to be fried entering the material inlet 52. After the material falls into the rotating drum 20, the material is driven by the rotating drum 20 to rotate, the material rotates to the position of the discharge port 53, and finally leaves the roasting machine from the discharge port 53.

In the roasting process, hot air enters the second hearth 102 from the air inlet 50 along the air inlet direction u, enters the rotary drum 20 through the sieve plate 30, and finally leaves the roasting machine from the air outlet 51 along the air outlet direction v. When the material is in the rotary drum 20, the hot air continuously penetrates through the sieve plate 30 and enters the rotary drum 20, so that the material is boiled in the rotary drum 20 under the action of the hot air, and the material is roasted. The air inlet 50 is arranged below the roasting machine in the height direction a, and the air outlet 51 is arranged above the roasting machine in the height direction a, so that the material is blown up from bottom to top in the height direction, the material can fully utilize the inner space of the rotary drum 20, and the roasting of the material in the rotary drum 20 can be more uniform.

The material in this embodiment is wheat, and in other embodiments of the present invention, the material is not limited to wheat, but may also be material such as barley, rice, and the like, and is not limited herein.

In other embodiments of the present invention, the furnace 10 is not limited to the manner in which the first furnace 101 and the second furnace 102 are connected in the present embodiment, and the first furnace 101 and the second furnace 102 may also be integrated, which is not limited herein.

Further, the screen plate 30 is disposed on the side of the revolving drum 20 close to the second furnace 102, and since the revolving drum 20 is rotating and the screen plate 30 is stationary, the screen plate 30 is separated from the end of the revolving drum 20 close to the second furnace 102 by a prescribed gap 82 (shown in fig. 5), thereby reducing or even avoiding damage caused by mutual abrasion between the screen plate 30 and the revolving drum 20.

Fig. 2 is a plan view of the drum 20 according to the embodiment of the present invention, and as shown in fig. 2, a plurality of partitions 201 are provided between the inner periphery and the outer periphery of the drum 20 to partition the interior of the drum 20 into a plurality of boiling chambers 202. Under the action of the hot wind pressure, the material starts to boil in the boiling chamber 202 and rotates along with the drum 20.

Fig. 3 is a top view of the screen plate 30 according to the embodiment of the present invention, and as shown in fig. 3, a plurality of ventilation holes 301 are formed in the screen plate 30, so that hot air can enter the drum 20 (shown in fig. 1) from the ventilation holes 301 after entering the second hearth 102 (shown in fig. 1) from the air inlet 50 (shown in fig. 1). The velocity of the hot air through the vents 301 is fast and can blow the material in the boiling chamber 202 (shown in fig. 2).

The sieve plate 30 is further provided with a discharge hole 302, and the position of the discharge hole 302 corresponds to and communicates with the discharge hole 53 (shown in fig. 1). When the material rotates to the position corresponding to the discharge hole 302 along with the drum 20, the material falls to the discharge hole 302 under the action of gravity and enters the discharge hole 53 from the discharge hole 302. The near region of discharge opening 302 does not set up ventilation hole 301, is blown by hot wind when avoiding the material rotatory to discharge opening 302 and leads to unable smooth ejection of compact.

Fig. 4 is an enlarged view of fig. 1 at a, and as shown in fig. 4, further, the roaster further includes a sealing structure 40, the sealing structure 40 separating an interlayer space 90 sandwiched by the outer periphery of the rotary drum 20 and the inner periphery of the first hearth 101 from the air outlet 51. In the present embodiment, the seal structure 40 includes a metal ring mount 401 provided around the inner periphery of the first hearth 101 and a metal ring 402. One end of the metal ring 402 is fixedly connected to the metal ring mounting seat 401, and the other end abuts against the end of the drum 20. During the rotation of the drum 20, friction is generated between the metal ring 402 disposed on the metal ring mounting seat 401.

In the process that the metal ring 402 rubs with the rotating drum 20, the metal ring 402 has certain deformability, and can match with the rotating drum 20 as much as possible, so the arrangement mode that the metal ring 402 abuts against the rotating drum 20 can seal the interlayer space 90, reduce the friction between the metal ring 402 and the rotating drum 20, and is beneficial to prolonging the service life of the sealing structure 40.

During roasting, the material is blown up in the rotary drum 20, and by the sealing structure 40, the material can be prevented from being blown out from the top of the rotary drum 20 (i.e. the rotary drum 20 is above the height direction a) and entering the interlayer space 90 from the interlayer space 90 above the height direction a, so that the material can be prevented from being burnt in the interlayer space 90. The sealing structure 40 also functions to reduce or even prevent the entry of material from the bowl 20 and screen deck 30 (shown in fig. 3) into the plenum space 90, as will be described in more detail below.

The metal ring 402 in this embodiment is formed by winding a 0.1mm 304 stainless steel into a ring shape, and since the metal ring 402 has a smaller thickness, compared with the thicker metal ring 402, the metal ring 402 has a higher deformation capability to adapt to the rotating drum 20, and can effectively reduce friction between the metal ring 402 and the rotating drum 20. In addition, during the operation of the roaster, the temperature of the rotating drum 20 is as high as several hundred degrees centigrade, and the metal ring 402 made of 304 stainless steel material can be well applied in the environment. In other embodiments of the present invention, the metal ring 402 may have other thicknesses or be made of other materials, which is not limited herein.

In the present embodiment, a slope portion 203 is further formed around one end of the drum 20 away from the second hearth 102. The metal ring 402 abuts against the inclined surface portion 203 so as not to interfere with the rotation of the bowl 20. The inclined surface portion 203 can further reduce the gap between the drum 20 and the metal ring mounting seat 401, which is advantageous for improving the sealing performance of the sealing structure 40. In addition, the inclined surface part 203 can change the contact between the metal ring 402 and the rotating drum 20 from surface contact to line contact, which effectively reduces the contact area between the metal ring 402 and the rotating drum 20, thereby reducing the friction between the metal ring 402 and the rotating drum 20, and being beneficial to prolonging the service life of the metal ring 402 and the rotating drum 20.

In other embodiments of the present invention, the sealing structure 40 is not limited to the metal ring mounting seat 401 and the metal ring 402 in this embodiment, and the sealing structure 40 may also be in other structures or arrangements, which are not specifically limited herein.

Further, an annular pressure plate 403 is disposed around the inner periphery of the metal ring mounting seat 401, and the outer periphery of the annular pressure plate 403 and the metal ring mounting seat 401 jointly clamp the metal ring 402. The annular pressing plate 403 and the metal ring mounting seat 401 clamp and fix the metal ring 402 from two sides of the metal ring 402, respectively, so that the metal ring 402 is firmly and stably connected with the metal ring mounting seat 401 in the process of roasting the material by the roasting machine.

Fig. 5 is an enlarged view of B of fig. 1, and as shown in fig. 5, further, the roaster has a channel structure 81 for communicating the inner space of the second hearth 102 with the interlayer space 90, and a bent portion 60 is formed at a side of the second hearth 102 close to the first hearth 101. In the present embodiment, the bent portion 60 includes a first bent portion 601 parallel to the screen plate 30 and a second bent portion 602 extending from the first bent portion 601 in a direction perpendicular to the screen plate 30. A gap is provided between the screen plate 30 and the first bent portion 601, and the gap constitutes a passage structure 81 for communicating the space inside the second furnace 102 with the sandwiched space 90.

Here, as described with reference to fig. 1, during the roasting process, the wind pressure of the second furnace chamber 102 is a first wind pressure P1, the wind pressure between the material and the sieve plate 30 is a second wind pressure P2, the wind pressure above the material is a third wind pressure P3, and the wind pressure of the interlayer space 90 is a fourth wind pressure P4.

As shown in fig. 5, after the hot wind enters the second hearth 102, the hot wind can enter the sandwiched space 90 from the passage structure 81 along the first wind direction b, and since the sealing structure 40 is provided between the first hearth 101 and the rotary drum 20, the first wind pressure P1 of the hot wind in the second hearth 102 is the same as the fourth wind pressure P4 of the sandwiched space 90, i.e., P1= P4.

The hot wind has pressure drop through the sieve plate 30, so that P4= P1> P2, and in addition, the hot wind passing through the sieve plate 30 has pressure drop and the wind pressure of the hot wind in the rotary drum 20 is smaller than that of the second hearth 102, so that P4= P1> P2> P3. In such a pressure relationship, hot air is blown from the sandwiched space 90 into the drum 20, and the material is hard to move from the drum 20 to the sandwiched space 90 through the predetermined gap 82 in the direction opposite to the first wind direction b, thereby preventing the material from leaking.

If the sealing structure 40 is not provided, the sandwiched space 90 communicates with the drum 20, and the fourth wind pressure P4 is the same as the third wind pressure P3, so that P1> P2> P3= P4. In this case, the hot air drives the material to move from the predetermined gap 82 to the interlayer space 90, so that the material is jammed in the predetermined gap 82 and even passes through the gap to enter the interlayer space 90. The material is stuck in the specified gap 82 or in the interlayer space 90, which can cause the material to be baked for a long time and not be discharged out of the baking machine, and the burning rate is increased and even the hidden danger of fire is brought because the time exceeds the normal baking time.

The roaster in the embodiment reduces or even avoids the situation that the material is clamped in the specified gap 82 and enters the interlayer space 90 by arranging the sealing structure 40 and the channel structure 81, is favorable for reducing the burnt rate of the material, and improves the safety of the roaster.

Fig. 6 is a cross-sectional view of the roaster according to another embodiment of the present invention, as shown in fig. 6, in another embodiment of the present invention, the channel structure 81 connecting the inner space of the second hearth 102 with the sandwiched space 90 may also be a communicating pipe 83, and the communicating pipe 83 is a pipeline connecting the sandwiched space 90 with the inner space of the second hearth 102 so that P4= P1, thereby preventing the material from leaking to the sandwiched space 90. The channel structure 81 may also be provided in other arrangements, which are not limited in this regard.

Further, as shown in fig. 1 and 5, the roaster further includes a plurality of gap width adjusting mechanisms 70 distributed at different circumferential positions on the outer edge of the sieve plate 30 for adjusting the width of a prescribed gap 82 between the outer edge of the sieve plate 30 and the end of the outer periphery of the basket 20 at the different circumferential positions, respectively. The circumferential positions referred to herein are a plurality of positions distributed along the circumferential direction s on the outer edge of the screen plate 30. In the present embodiment, the circumferential positions are a first position a, a second position B, and a third position C that are evenly distributed in the circumferential direction s on the outer edge of the screen plate 30. According to the principle that three points form a plane, the plane can be adjusted by the three points, and the three points which are uniformly distributed have better stability, so that the sieve plate can be kept stable in the roasting process. In other embodiments of the present invention, the circumferential positions are not limited to the uniformly distributed manner, and may also be non-uniformly distributed manner, and the positions are not limited to three points, and may also be other numbers, which are not specifically limited herein.

A plurality of gap width adjustment mechanisms 70 are provided so that a prescribed gap 82 between the screen panel 30 and the bowl 20 is adjustable. When the screen panel 30 is not parallel to the drum 20, the operator can adjust the gap width adjustment mechanism 70 so that the prescribed gap 82 between the screen panel 30 and the drum 20 is uniform. The uniform clearance 82 can promote the uniform roasting, which is beneficial to reducing the scorching rate of the material and improving the safety of the roasting machine.

In addition, the specified gap 82 can be adjusted, so that a worker can adjust the specified gap 82 according to different types of materials. When smaller materials are used, the specified gap 82 is correspondingly adjusted smaller, and when larger materials are used, the specified gap 82 is correspondingly adjusted larger, so that the applicability of the roasting machine is improved.

In the present embodiment, the gap width adjusting mechanism 70 is a double screw pair, and there are three sets of double screw pairs in total. By adjusting three sets of double thread pairs, i.e., three gap width adjustment mechanisms 70, the plane of the screen plate 30 can be adjusted to be parallel to the plane of the bowl 20. When three sets of screw thread pairs play the regulation effect, also reduced the staff and adjusted the time energy that consumes when prescribing clearance 82, make things convenient for follow-up staff to maintain the regulation.

Specifically, the gap width adjustment mechanism 70 in the present embodiment includes a first bolt 701 for adjusting the width of the prescribed gap 82 and a second bolt 702 for locking the position of the screen plate 30. The first bent portion 601 is provided with a threaded hole 61 matching the first bolt 701, and the first bolt 701 passes through the threaded hole 61 to be connected to the screen plate 30.

The first bolt 701 is engaged with the screw hole 61 provided in the first bent portion 601, and by adjusting the first bolt 701, the inner circumference of the first bolt 701 can be adjusted to be hollow and to have an internal thread with respect to the predetermined gap 82, so that the second bolt 702 can be inserted through the first bolt 701 and fixedly engaged with the first bolt 701. The second hearth 102 further includes a fixing ring 80, which is of an annular structure. The fixing ring 80 is used for fixed connection with the screen plate 30, and the fixing ring 80 has through holes matched with the second bolts 702. After the second bolt 702 sequentially passes through the fixing ring 80 and the first bolt 701, the other end of the second bolt is fixed by the nut 703, so that the first bolt 701 and the fixing ring 80 are locked. The second bolts 702 ensure a stable and reliable connection of the screen plate 30, thereby enabling the gap width adjustment mechanism 70 to adjust the predetermined gap 82 and ensure the stability of the screen plate 30.

In this embodiment, the fixing ring 80 is connected to the screen plate 30 by a screw connection, which is a detachable connection mode, and facilitates subsequent detachment and replacement of the screen plate 30.

In other embodiments of the present invention, the gap width adjusting mechanism 70 may have other structures or arrangements, which are not specifically limited herein. For example, the gap width adjustment mechanism 70 may be a plurality of support blocks for supporting the screen 30, and the gap width adjustment may be accomplished by adjusting the support blocks, such as by replacing support blocks of different heights.

After a period of operation of the roaster, impurities accumulate on the sieve plate 30, which may cause fire during the roasting process and thus need to be cleaned regularly. The second furnace chamber 102 is provided with an access hole for overhauling the sieve plate 30, and the sieve plate 30 in the embodiment is loaded from bottom to top along the height direction a, so that the sieve plate can be quickly taken out and cleaned from the access hole of the second furnace chamber. The arrangement mode is convenient for workers to overhaul each component in the hearth 10, and the safety and the maintainability of the roasting machine are improved.

Those of skill in the art will appreciate that particular features of the various embodiments may be adaptively split or combined. Such splitting or combining of specific technical features does not cause the technical solutions to deviate from the principle of the present invention, and therefore, the technical solutions after splitting or combining will fall within the protection scope of the present invention. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A roaster, comprising:

the first hearth is arranged at one end of the roasting machine and is provided with an air outlet;

the second hearth is arranged at the other end of the roasting machine, the second hearth is fixedly connected with the first hearth, and the second hearth is provided with an air inlet;

a drum disposed within the first hearth and rotatable within the first hearth;

the sieve plate is arranged on one side of the rotary drum, which is far away from the first hearth, hot air entering from the air inlet sequentially passes through the sieve plate and the rotary drum and then flows out from the air outlet, and the roasting machine is characterized by further comprising,

and the sealing structure separates an interlayer space sandwiched by the outer periphery of the rotary drum and the inner periphery of the first hearth from the air outlet.

2. The roaster of claim 1, wherein the seal arrangement comprises:

the metal ring mounting seat is arranged around the inner periphery of the first hearth;

one end of the metal ring is fixed on the metal ring mounting seat, and the other end of the metal ring is abutted against the end part of the rotary drum.

3. The roaster of claim 2, further comprising an annular pressure plate circumferentially disposed on an inner periphery of the metal ring mount, an outer periphery of the annular pressure plate and the metal ring mount cooperatively clamping the metal ring.

4. The roaster of claim 2, wherein the first hearth is provided with a feed port in communication with the rotary drum, and the second hearth is provided with a discharge port in communication with the rotary drum.

5. The roaster as claimed in any one of claims 1 to 4, wherein the end of the rotating drum away from the first hearth has a prescribed clearance from the sieve plate.

6. The roaster of claim 5, further comprising:

and the channel structure is used for communicating the inner space of the second hearth with the interlayer space.

7. A roasting machine as claimed in claim 6, wherein said passage structure is a communicating pipe, said communicating pipe communicating said sandwiched space with said second hearth interior space.

8. The roaster of claim 6, further comprising a fixed ring disposed around the second hearth, the fixed ring being fixedly connected to the screen plate, the fixed ring having a gap with the second hearth to form the channel structure.