Drying device for pill production

Abstract

The utility model relates to the technical field of pill production, in particular to a drying device for pill production, which comprises a bottom plate, a working plate is arranged right above the bottom plate, a plurality of support columns are fixed at the bottom end of the working plate, and springs are mounted between the support columns and the bottom plate. Through the arrangement of the springs, the drying box, the box door, the containing frames, the net plates and the vibration motor, pills can be conveniently placed, meanwhile, through the arrangement of the bottom plate, the working plate, the supporting columns, the springs and the vibration motor, the pills placed on the net plates can be driven to vibrate, and the vibration effect is improved. The effect of preventing uneven drying caused by pill accumulation is achieved, through the design of a heating box, an air inlet pipe, a draught fan, a ventilation pipe, an air outlet pipe, a corrugated pipe, an air outlet disc and a plurality of heating rods in the drying mechanism, hot air is diffused from top to bottom in the drying box, and the effect that the pills are heated more evenly is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pill production technical field, concretely is a kind of drying device for pill production. BACKGROUND

[0002] Pill is a common drug dosage form, it is the spherical or spheroid preparation made of drug fine powder or extract and suitable auxiliary material, pill has many advantages, such as convenient to take, drug efficacy is durable, stability is better etc., is favored by patient and pharmaceutical industry, however, the quality of pill has very high requirement to drying link, its moisture content is directly related to the drug efficacy of pill, stability and shelf life, pill needs to use drying device in the process of drying.

[0003] Traditional pill drying device exposes many drawbacks in actual production, seriously restricts the quality improvement of pill and production efficiency improvement, early drying equipment mostly adopts static drying mode, and the structure is relatively simple, pill is in static state in drying box, hot air is difficult to uniformly penetrate pill stack, taking common simple drying box as an example, hot air only enters from top or one side, so that the drying condition of pill is significantly different, the pill close to hot air inlet is prone to over-drying due to long time in high temperature environment, not only appears dry crack phenomenon, but also causes large loss of drug efficacy component, while the pill far from the entrance is insufficiently dried, and moisture content is overproof, is easily mildewed and deteriorated in subsequent storage process, greatly influences the consistency and stability of pill quality;At the same time, traditional device lacks effective vibration or turnover mechanism, pill is prone to accumulate in drying process, especially the pill with greater viscosity, and the accumulation is more serious, the pill in the accumulation interior is limited to contact with external air, and moisture is difficult to release, so that drying time is greatly extended, and production efficiency is low, it is difficult to meet large-scale production demand, in view of this, we propose a kind of drying device for pill production. CONTENT OF UTILITY MODEL

[0004] The utility model discloses a drying device for pill production to solve the traditional pill drying device exposes many drawbacks in actual production in the background art, seriously restricts the pill quality promotion and production efficiency improvement, and early drying equipment adopts static drying mode, and the structure is relatively simple, and the pill is in the static state in the drying box, and hot air is difficult to uniformly penetrate the pill stack, taking the common simple drying box as an example, hot air only enters from the top or one side, making the pill drying condition difference remarkable, the pill near the hot air inlet, because long time is in high temperature environment, easy excessive drying, not only appears dry crack phenomenon, but also will cause the large loss of medicinal ingredient, and the pill far from the entrance is insufficiently dried, and the water content is overproof, and in the subsequent storage process, it is extremely easy to mildew and deteriorate, greatly influence the consistency and stability of the pill quality, simultaneously, the traditional device lacks effective vibration or turnover mechanism, and the pill is extremely easy to accumulate in the drying process, especially the pill with greater viscosity, and the accumulation is more serious, and the pill in the accumulation interior is limited to contact with the external air, and the moisture is difficult to release, making the drying time greatly extend, and the production efficiency is low, and it is difficult to meet the large -scale production demand problem.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A drying device for pill production, including the bottom plate, the bottom plate is provided with the work plate on the top, a plurality of support columns are fixed on the work plate bottom, the spring is installed between the support column and the bottom plate, the vibration motor is installed on the work plate top, the drying box is fixed on the work plate top, the front surface of drying box is equipped with the box door of hinge connection, the temperature sensor and humidity sensor are installed on the inner top of drying box, the steam exhaust pipe that is connected with the inner chamber of drying box top is fixed, the solenoid valve is installed on the outer wall of steam exhaust pipe, the sliding connection of a plurality of is arranged from top to bottom and is placed in the frame between the left and right two side inner walls of drying box, and the inner wall of frame is installed with the mesh for placing the pill, still include:

[0007] Drying mechanism, setting on the top of bottom plate, for drying treatment to the pill in the inside of drying box, the drying mechanism includes the heating box of fixed on the top of bottom plate, the air inlet pipe of fixed on the top of heating box and with its inner chamber is connected, the fan of installation on the circumferential inner wall of air inlet pipe, the air pipe of fixed on the right side surface of heating box near the bottom end and with its inner chamber is connected, the air outlet pipe that extends to the bottom end near inside of drying box and is through the bottom surface of drying box, the air outlet pipe and air pipe are connected through the bellows, the air outlet disc that is connected with the inner chamber of air outlet pipe and is located below a plurality of placed frames is fixed on the top of air outlet pipe, the circumferential outer wall and the top of air outlet disc all are equipped with a plurality of air outlet holes that are connected with its inner chamber, and a plurality of heating rods are installed on the left and right two side inner walls of heating box.

[0008] As a preferred implementation form, the top surface of the work plate is provided with a through slot, the bottom surface of the drying box is provided with a through hole communicating with the inner cavity, and the air outlet pipe penetrates the through slot on the top surface of the work plate and the through hole on the bottom surface of the drying box in sequence and extends to the bottom end of the drying box.

[0009] As a preferred implementation form, the mesh plate is corresponding to the position of the same side placing frame and is adapted to the size, the inner walls on the left and right sides of the drying box are provided with a plurality of sliding grooves arranged from top to bottom, and the left and right side surfaces of the placing frame are fixedly provided with sliding strips slidingly connected with the sliding grooves on the same side of the inner wall of the drying box.

[0010] As a preferred implementation form, the box door is corresponding to the position of the drying box and is adapted to the size, the right side surface of the box door is hingedly provided with two mutually symmetrical buckles, the right side surface of the drying box is fixedly provided with two mutually symmetrical buckling blocks close to the front end and buckling with the buckles on the same side, and the front side surface of the box door is fixedly provided with a handle in the shape of a U-shaped.

[0011] As a preferred implementation form, the plurality of supporting columns at the bottom end of the work plate are arranged in a matrix, and the spring is provided with a gasket between the same side supporting column and the bottom plate.

[0012] As a preferred implementation form, the bottom plate is fixedly provided with an anti-skid plate corresponding to the shape, the thickness of the anti-skid plate is 2-6 cm, and the bottom surface of the anti-skid plate is provided with anti-skid lines.

[0013] As a preferred implementation form, the front side surface of the drying box is provided with a sealing groove in the shape of a U-shaped, the rear side surface of the box door is fixedly provided with a sealing strip slidingly inserted into the sealing groove on the front side surface of the drying box, the part of the drying box in contact with the steam exhaust pipe is provided with a sealing ring, the parts of the air outlet pipe in contact with the air outlet disc, the through slot on the top surface of the work plate and the through hole on the top surface of the drying box are provided with sealing rings, the parts of the heating box in contact with the air inlet pipe and the air pipe are provided with sealing rings, and the parts of the corrugated pipe in contact with the air outlet pipe and the air pipe are also provided with sealing rings.

[0014] As a preferred implementation form, the longitudinal section shape of the sliding groove on the inner wall of the drying box is in the shape of an I-shaped, and the shape of the sliding strip is in the shape of an I-shaped corresponding to the shape of the sliding groove on the inner wall of the drying box.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. The utility model discloses a through the setting of a plurality of springs, drying box, door, a plurality of placing frame, a plurality of net board and vibration motor, realize the convenient placement of pill, can drive the pill vibration of being placed on a plurality of net board through the setting of bottom plate, workboard, a plurality of support column, a plurality of springs and vibration motor, reached the effect that prevent pill accumulation and lead to uneven drying,

[0017] 2. The utility model discloses through the design of heating box, air inlet pipe, fan, breather pipe, air outlet pipe, bellows, air outlet disc and a plurality of heating rod in drying mechanism, realize the heat gas diffusion from top to bottom in drying box, reached the effect that let pill heat more evenly,

[0018] 3. The utility model discloses through the setting of sealing strip between door and drying box, sealing ring of drying box contact part of exhaust pipe, sealing ring of each connecting portion of air outlet pipe, sealing ring of each connecting portion of heating box and the sealing ring of each connecting portion of bellows between drying box, realize the sealing property of whole device is promoted, reached the effect that prevent hot gas leakage, guarantee the effect of stable drying. ACCURACY OF DRAWINGS

[0019] Figure 1 It is one of the overall structure schematic diagram of the utility model;

[0020] Figure 2 It is the second overall structure schematic diagram of the utility model;

[0021] Figure 3 It is the third overall structure schematic diagram in the utility model;

[0022] Figure 4 It is one of the local explosion drawing in the utility model;

[0023] Figure 5 It is the internal structure schematic diagram of drying box in the utility model;

[0024] Figure 6 It is the second local explosion drawing in the utility model;

[0025] Figure 7 It is the third local explosion drawing in the utility model;

[0026] Figure 8 It is the overall structure schematic diagram of drying mechanism in the utility model;

[0027] Figure 9 It is the local explosion drawing of drying mechanism in the utility model;

[0028] Figure 10 It is the internal structure schematic diagram of heating box in the utility model;

[0029] Figure 11 It is the internal structure schematic view of the air inlet pipe in the utility model;

[0030] Figure 12 It is the partial explosion view No.4 in the utility model;

[0031] The meaning of each reference numeral in the drawing is as follows:

[0032] 1, bottom plate; 2, work plate; 3, support column; 4, spring; 5, drying box; 6, box door; 7, placing frame; 8, mesh plate; 9, drying mechanism; 91, heating box; 92, air pipe; 93, air outlet pipe; 94, bellows; 95, air outlet disc; 96, air inlet pipe; 97, fan; 98, heating rod; 10, vibration motor; 11, gasket; 12, anti-skid plate; 13, temperature sensor; 14, humidity sensor; 15, steam exhaust pipe; 16, electromagnetic valve; 17, sealing strip; 18, handle; 19, slide bar; 20, buckle; 21, clamping block. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0034] Please refer to Figures 1-12 The utility model provides a technical scheme: a drying device for pill production, including bottom plate 1, bottom plate 1 is provided with work plate 2 directly above, a plurality of support columns 3 are fixed at the bottom end of work plate 2, spring 4 is installed between support column 3 and bottom plate 1, vibration motor 10 is installed on the top surface of work plate 2, drying box 5 is fixed on the top surface of work plate 2, the front surface of drying box 5 is provided with box door 6 hinged to it through two hinges, temperature sensor 13 and humidity sensor 14 are installed on the inner top surface of drying box 5, steam exhaust pipe 15 is fixed on the top surface of drying box 5 and is communicated with the inner cavity thereof, electromagnetic valve 16 is installed on the outer wall of steam exhaust pipe 15, a plurality of placing frames 7 are slidably connected between the left and right inner walls of drying box 5 and are arranged from top to bottom, and mesh plate 8 for placing pills is installed on the inner wall of placing frame 7, and it further includes:

[0035] The drying mechanism 9 is arranged on the top surface of the bottom plate 1 and used for drying the pills in the drying box 5. The drying mechanism 9 comprises a heating box 91 fixed on the top surface of the bottom plate 1, an air inlet pipe 96 fixed on the top surface of the heating box 91 and communicating with the inner cavity of the heating box 91, a fan 97 installed on the circumferential inner wall of the air inlet pipe 96, an air outlet pipe 93 penetrating through the bottom surface of the drying box 5 and extending to the inner bottom of the drying box 5, a vent pipe 92 fixed on the right side surface of the heating box 91 close to the bottom end and communicating with the inner cavity of the heating box 91, the air outlet pipe 93 communicates with the vent pipe 92 through a corrugated pipe 94, and the top surface of the air outlet pipe 93 is fixed with an air outlet disc 95 communicating with the inner cavity of the air outlet pipe 93 and located below the plurality of placing frames 7. The circumferential outer wall and the top surface of the air outlet disc 95 are provided with a plurality of air outlet holes communicating with the inner cavity of the air outlet disc 95. A plurality of heating rods 98 are installed on the left and right side inner walls of the heating box 91. Through the arrangement of the plurality of springs 4, the drying box 5, the box door 6, the plurality of placing frames 7, the plurality of mesh plates 8 and the vibration motor 10, the pills can be conveniently placed. Through the arrangement of the bottom plate 1, the working plate 2, the plurality of supporting columns 3, the plurality of springs 4 and the vibration motor 10, the pills placed on the plurality of mesh plates 8 can be driven to vibrate, thereby preventing the pills from accumulating and causing uneven drying. Through the design of the heating box 91, the air inlet pipe 96, the fan 97, the vent pipe 92, the air outlet pipe 93, the corrugated pipe 94, the air outlet disc 95 and the plurality of heating rods 98 in the drying mechanism 9, the hot air can be diffused from top to bottom in the drying box 5, thereby making the pills more evenly heated.

[0036] In the embodiment, the top surface of the working plate 2 is provided with a through slot, the bottom surface of the drying box 5 is provided with a through hole communicating with the inner cavity of the drying box 5, and the air outlet pipe 93 penetrates through the through slot on the top surface of the working plate 2 and the through hole on the bottom surface of the drying box 5 in sequence and extends to the inner bottom of the drying box 5, so that the hot air generated by the drying mechanism 9 can smoothly enter the drying box 5, thereby ensuring smooth drying process.

[0037] In addition, the mesh plate 8 is correspondingly arranged and sized with the placing frame 7 on the same side. The left and right side inner walls of the drying box 5 are provided with a plurality of sliding grooves arranged from top to bottom. The left and right side surfaces of the placing frame 7 are fixed with sliding strips 19 slidingly connected with the sliding grooves on the same side of the inner wall of the drying box 5, so that the placing frame 7 can stably slide in the drying box 5, thereby facilitating operation.

[0038] Further, the box door 6 is correspondingly arranged and sized with the drying box 5. The right side surface of the box door 6 is hingedly connected with two mutually symmetrical buckles 20. The right side surface of the drying box 5 close to the front end is fixed with two mutually symmetrical clamping blocks 21 clamped with the buckles 20 on the same side. The front side surface of the box door 6 close to the right end is fixed with a handle 18 in the shape of U-shaped, so that the box door 6 can tightly close the drying box 5 and be conveniently opened and closed.

[0039] Specific, the bottom end of the workbench 2 several support columns 3 arranged in matrix, and the spring 4 and the same side support column 3 and the bottom plate 1 are all installed with gasket 11, make the workbench 2 stress more evenly, the buffering effect of spring 4 is more stable.

[0040] It is worth noting that the bottom plate 1 bottom end is fixed with the shape of the anti-skid plate 12, the thickness of the anti-skid plate 12 is 2-6cm, and the bottom surface of the anti-skid plate 12 is provided with anti-skid lines, preferably 3cm, so that the device is placed more stably, and displacement is avoided during work.

[0041] It is worth mentioning that the front surface of the drying box 5 is provided with a sealing groove in the shape of a back, the rear surface of the box door 6 is fixed with a sealing strip 17 which is slidingly inserted into the sealing groove of the front surface of the drying box 5, the part of the drying box 5 in contact with the steam exhaust pipe 15 is provided with a sealing ring, the parts of the air outlet pipe 93 in contact with the air outlet disc 95, the through groove on the top surface of the workbench 2 and the through hole on the top surface of the drying box 5 are all provided with sealing rings, the parts of the heating box 91 in contact with the air inlet pipe 96 and the air pipe 92 are all provided with sealing rings, and the parts of the corrugated pipe 94 in contact with the air outlet pipe 93 and the air pipe 92 are also all provided with sealing rings, so that the whole device is well sealed, preventing hot air leakage and ensuring drying effect.

[0042] It is worth emphasizing that the longitudinal section shape of the sliding groove on the inner wall of the drying box 5 is in the shape of an I-beam, and the shape of the sliding strip 19 is in the shape of an I-beam which is matched with the shape of the sliding groove on the inner wall of the drying box 5, so that the placing frame 7 is more stable during sliding and is not easy to shake or fall off.

[0043] It needs to be supplemented that the fan 97, the plurality of heating rods 98, the vibration motor 10, the temperature sensor 13, the humidity sensor 14 and the electromagnetic valve 16 are all electrically connected to the external PLC through wires, and the fan 97, the plurality of heating rods 98, the vibration motor 10, the temperature sensor 13, the humidity sensor 14 and the electromagnetic valve 16 are all electrically connected to the external power supply through wires, and the external PLC is also electrically connected to the external power supply through wires.

[0044] Finally, it needs to be explained that the fan 97, the plurality of heating rods 98, the vibration motor 10, the temperature sensor 13, the humidity sensor 14 and the electromagnetic valve 16 involved in the utility model are all general standard parts or parts known to those skilled in the art, their structure and principle are known to those skilled in the art through technical manual or through conventional experimental method, all electrical components in the above are connected through wires at the idle place of the device, the specific connection means should be referred to the working principle in the utility model, the electrical components are electrically connected in the order of working sequence, and the detailed connection means are all known technologies in the art.

[0045] In the specific use process of the embodiment, first, the entire device is placed in position, the anti-skid plate 12 at the bottom end of the bottom plate 1 and the anti-skid lines thereof enable the device to be stably placed in the working area, avoiding displacement during work, and the working plate 2 is elastically supported by the matrix-arranged support columns 3 and the springs 4 and the gaskets 11 between the column bottoms and the bottom plate 1, buffering the subsequent generated vibration;

[0046] Subsequently, the two buckles 20 are separated from the two clamping blocks 21, then the box door 6 is opened, the box door 6 is opened by rotating around the front side of the drying box 5 through the hinge, the pill is placed on the several mesh plates 8 corresponding to the positions of the several placing frames 7 and matching the sizes, the sliding bars 19 on the two sides of the placing frame 7 are adapted to the I-shaped sliding grooves on the inner wall of the drying box 5, can stably slide, and are convenient to operate, after completion, the box door 6 is closed, the buckles 20 are clamped with the clamping blocks 21, and the sealing strip 17 on the back side of the box door 6 cooperates with the sealing groove on the front side of the drying box 5, so that the inside of the box is closed;

[0047] Then, the external PLC starts the several heating rods 98 and the fan 97, the several heating rods 98 in the heating box 91 work and heat, the fan 97 draws external air into the heating box 91 through the air inlet pipe 96, the heated air enters the air outlet pipe 93 through the air pipe 92 and the corrugated pipe 94, and is finally uniformly sprayed from the air outlet holes of the air outlet disc 95, the hot air diffuses from top to bottom in the drying box 5, and at the same time, the external PLC starts the vibration motor 10, the vibration motor 10 drives the working plate 2 and the pills in the drying box 5 to vibrate after being started, and the drying box 5 vibrates under the support of the working plate 2, the several support columns 3, the several springs 4, the several gaskets 11, the bottom plate 1 and the anti-skid plate 12, so that the pills can be prevented from accumulating, the hot air and the pills can be fully contacted, the drying uniformity can be improved, the temperature sensor 13 and the humidity sensor 14 monitor the temperature and humidity in the box in real time, the operator adjusts the drying parameters according to the data, the water vapor generated during drying is discharged through the steam discharge pipe 15, the opening and closing of the electromagnetic valve 16 is controlled through the external PLC, and then the steam discharge time can be controlled through the electromagnetic valve 16, so that the drying environment is stable;

[0048] After drying, the external PLC closes the several heating rods 98, the fan 97, the vibration motor 10 and the electromagnetic valve 16, according to the above description, so that the box door 6 can be opened, and then the several placing frames 7 are taken out, and the pill drying operation is completed.

[0049] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A drying device for pellet production, comprising a base plate (1), characterized in that, The bottom plate (1) is provided with a work plate (2) above, the bottom end of the work plate (2) is fixedly provided with a plurality of supporting columns (3), the supporting columns (3) and the bottom plate (1) are provided with springs (4), the top surface of the work plate (2) is provided with a vibration motor (10), the top surface of the work plate (2) is fixedly provided with a drying box (5), the front surface of the drying box (5) is provided with a box door (6) hinged thereto, the inner top surface of the drying box (5) is provided with a temperature sensor (13) and a humidity sensor (14), the top surface of the drying box (5) is fixedly provided with an exhaust pipe (15) communicated with the inner cavity thereof, the outer wall of the exhaust pipe (15) is provided with an electromagnetic valve (16), the left and right inner walls of the drying box (5) are slidably connected with a plurality of placing frames (7) arranged from top to bottom, and the inner wall of the placing frame (7) is provided with a mesh plate (8) for placing pills, further comprising: A drying mechanism (9) is arranged on the top surface of the bottom plate (1) and used for drying the pills in the drying box (5), the drying mechanism (9) comprises a heating box (91) fixed on the top surface of the bottom plate (1), an air inlet pipe (96) fixed on the top surface of the heating box (91) and communicated with the inner cavity thereof, a fan (97) arranged on the circumferential inner wall of the air inlet pipe (96), an air outlet pipe (92) fixed on the right side surface of the heating box (91) near the bottom end and communicated with the inner cavity thereof, an air outlet pipe (93) penetrating through the bottom surface of the drying box (5) and extending to the inner bottom of the drying box (5), the air outlet pipe (93) and the air outlet pipe (92) are communicated through a corrugated pipe (94), the top surface of the air outlet pipe (93) is fixedly provided with an air outlet disc (95) communicated with the inner cavity thereof and located below the plurality of placing frames (7), the circumferential outer wall and the top surface of the air outlet disc (95) are provided with a plurality of air outlet holes communicated with the inner cavity thereof, and a plurality of heating rods (98) are arranged on the left and right inner walls of the heating box (91).

2. The drying apparatus for pellet production according to claim 1, characterized in that: The top surface of the work plate (2) is provided with a through slot, the bottom surface of the drying box (5) is provided with a through hole communicated with the inner cavity thereof, and the air outlet pipe (93) penetrates through the through slot on the top surface of the work plate (2) and the through hole on the bottom surface of the drying box (5) in sequence and extends to the inner bottom of the drying box (5).

3. The drying apparatus for pellet production according to claim 1, characterized in that: The mesh plate (8) corresponds to the position of the placing frame (7) on the same side and is adapted in size, a plurality of sliding grooves arranged from top to bottom are arranged on the left and right inner walls of the drying box (5), and the left and right side surfaces of the placing frame (7) are fixedly provided with sliding strips (19) slidably connected with the sliding grooves on the same side of the inner wall of the drying box (5).

4. The drying apparatus for pellet production according to claim 1, characterized in that: The box door (6) corresponds to the position of the drying box (5) and is adapted in size, the right side surface of the box door (6) is hinged with two mutually symmetrical buckles (20), the right side surface of the drying box (5) is fixedly provided with two mutually symmetrical clamping blocks (21) near the front end and clamped with the buckles (20) on the same side, and the front side surface of the box door (6) is fixedly provided with a handle (18) in the shape of U.

5. The drying apparatus for pellet production according to claim 1, characterized in that: The support columns (3) at the bottom end of the work plate (2) are arranged in a matrix, and the spring (4) is installed with a gasket (11) between the same side support column (3) and the bottom plate (1).

6. The drying apparatus for pellet production according to claim 1, characterized in that: The bottom plate (1) is fixed with a non-slip plate (12) with the same shape at the bottom end, the thickness of the non-slip plate (12) is 2-6cm, and the bottom surface of the non-slip plate (12) is provided with anti-skid lines.

7. The drying apparatus for pellet production according to claim 2, characterized by: The front surface of the drying box (5) is provided with a sealing groove in the shape of a back character, the rear surface of the box door (6) is fixed with a sealing strip (17) which is slidingly inserted into the sealing groove on the front surface of the drying box (5), the part of the drying box (5) which is in contact with the steam exhaust pipe (15) is provided with a sealing ring, the parts of the air outlet pipe (93), the air outlet disc (95), the through groove on the top surface of the work plate (2) and the through hole on the top surface of the drying box (5) which are in contact are all provided with sealing rings, the parts of the heating box (91), the air inlet pipe (96) and the air pipe (92) which are in contact are all provided with sealing rings, and the parts of the corrugated pipe (94), the air outlet pipe (93) and the air pipe (92) which are in contact are also all provided with sealing rings.

8. The drying apparatus for pellet production according to claim 3, characterized in that: The longitudinal section shape of the sliding groove on the inner wall of the drying box (5) is in the shape of an I-beam, and the shape of the sliding bar (19) is an I-beam which is adapted to the shape of the sliding groove on the inner wall of the drying box (5).

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