CN109761708A - Continuous reaction film-forming coating equipment and its special coating drum - Google Patents

Abstract

The invention discloses a kind of continuous reaction film forming coating equipment in sugar production line and its dedicated coating cylinders, including erecting bed；It is coated cylinder, horizontally rotates and is arranged on erecting bed；Central tube, central tube are coaxially threaded through on coating cylinder, and the both ends of central tube are arranged on erecting bed by fixed frame support respectively；Isolation board, multiple isolation boards are spaced apart along the axis direction of central tube, and it is arranged between coating cylinder and central tube, the inside for being coated cylinder is separated out multiple spaces, opening and closing type window is formed on each isolation board, so that the coating intracorporal multiple spaces of cylinder are serially connected, to form the multistage coating chamber being sequentially connected in series and the discharge chamber with afterbody coating chamber in coating cylinder；Two spiral stream guidance leaves are fixedly installed on the central tube between every adjacent two isolation board in spiral stream guidance leaf, and two spiral stream guidance leaves are interspersed around the circumferential direction of central tube, and then form helical buffer runner between adjacent two coatings chamber.

Description

Continuous reaction film forming coating equipment in sugar production line and its dedicated coating cylinder

Technical field

The present invention relates to a kind of coating equipment in sugar production line, in particular to a kind of continuous reaction film forming coating equipment in sugar production line and its dedicated coating Cylinder, belongs to slow-release or control-release fertilizer production field.

Background technique

Coating controlled-release fertilizer is to use that various high molecular materials are either physically or chemically sprayed on fertiliser granulates surface, membrane material It is formed by curing one layer of fine and close coating through dry or reaction, to realize the control release of fertilizer nutrient.

Reaction film forming coated granule fertilizer production mode at this stage includes: 1. to be single pot to produce, due in single pot of production Granulated fertilizer residence time in coating equipment in sugar production line is longer, wraps up repeatedly, therefore there are low output, energy consumption are high, uncomfortable for single pot of production The problems such as closing industrialized production；2. be continuous production, due in continuous production coating material and granulated fertilizer according to certain Material mixture ratio formed, coating amount is generally difficult to change, if increase coating amount, in Flow of Goods and Materials and reaction, it is likely that There is a problem of that reaction is insufficient, granulated fertilizer is caused form a film in secondary coating the problem of being easy to fall off, and then reduces slow control The quality for releasing fertilizer, shortens the dissolution time of slow-release or control-release fertilizer, increases the application risk of slow-release or control-release fertilizer.

Summary of the invention

In view of the above-mentioned problems, the object of the present invention is to provide a kind of serializations that can be improved coated product yield and quality Reaction film forming coating equipment in sugar production line and its dedicated coating cylinder.

To achieve the above object, the invention adopts the following technical scheme: a kind of dedicated coating cylinder, including erecting bed, it is special Sign is, further includes:

It is coated cylinder, horizontally rotates and is arranged on the erecting bed；

Central tube, the central tube are coaxially threaded through on the coating cylinder, and institute is stretched out at the both ends of the central tube respectively The outside of coating cylinder is stated, also, the both ends of the central tube are arranged on the erecting bed by fixed frame support respectively；

Isolation board, multiple isolation boards are spaced apart along the axis direction of the central tube, and are arranged in the coating Between cylinder and central tube, the inside of the coating cylinder is separated out multiple spaces, being formed on each isolation board can Open-close type window, so that the intracorporal multiple spaces of coating cylinder are serially connected, to be formed successively in the coating cylinder Concatenated multistage coating chamber and the discharge chamber with coating chamber described in afterbody；

Spiral stream guidance leaf, two spirals of fixed setting are led on the central tube between every adjacent two isolation board Leaf is flowed, and the two spiral stream guidance leaves are interspersed around the circumferential direction of the central tube, and then in the adjacent two coating chamber Between formed helical buffer runner.

Further, the coating cylinder is in sealing tubular structure, there are feed inlet on the front end-plate of the coating cylinder, There are discharge ports on the end plate of the coating cylinder；The isolation board is round isolation board, and the outer diameter of the isolation board is less than The internal diameter of the coating cylinder.

Further, taper discharge barrel, the taper are nested on the central tube between adjacent two isolation board Discharge barrel is fixedly connected with the two spiral stream guidance leaves, the outlet in spiral unhurried current channel and the undergauge of the taper discharge barrel Discharge port connection；Multiple lifting blades, and phase are set along the internal perisporium interval of the coating cylinder in each coating chamber It is distributed between adjacent two lifting blades in splayed.

Further, the isolation board is in hinge window construction, and the isolation board includes the circumferencial direction along the central tube Equally distributed multiple fan-shaped hinges, and it is set in the Circular Plate outside the outer peripheral edge of multiple fan-shaped hinges；Each institute State rotation setting first connecting rod between the inner peripheral of fan-shaped hinge and the periphery wall of the central tube, each fan-shaped hinge Outer peripheral edge and the Circular Plate internal perisporium between rotation setting the second connecting rod.

Further, two circular ring shape partitions are set in the two sides of each isolation board, each circular ring shape partition Outer peripheral edge is fixed on the internal perisporium of the coating cylinder, and the internal diameter of each circular ring shape partition is less than the outer of the isolation board Diameter.

Further, the invention also includes the driving machines of the fan-shaped hinge synchronous on-off for controlling multiple isolation boards Structure；The driving mechanism includes drive rod, connecting shaft and link block；The drive rod is actively plugged in the central tube, One end of the drive rod is stretched out the outside of the central tube and is connect with actuator, and the actuator is for driving the transmission Bar moves back and forth in the central tube；Interval setting is more on the outer circumference surface of drive rod corresponding with each isolation board A connecting shaft, the number of the connecting shaft is identical as the fan-shaped number of hinge on the isolation board, each described One end of connecting shaft is fixedly connected on the outer circumference surface of the drive rod, the other end rotation connection one of each connecting shaft The one end of the link block, each first connecting rod being located inside the central tube is fixedly connected with the link block.

Another aspect of the present invention provides a kind of continuous reaction film forming coating equipment in sugar production line based on above-mentioned dedicated coating cylinder, It is characterized in that, comprising:

Granulated fertilizer heats feed system, is connected to by feed pipe with the feed inlet of the coating cylinder；

Spray equipment, including delivery pipe, spray tube and spray head；Two delivery pipes are set in the central tube, every Two spray tubes, the discharging on two spray tubes and two delivery pipes are installed on the one indoor central tube of coating chamber Interface corresponds connection, is equipped with spray head on each spray tube；

Coating material feed system, two material outlets and two conveying pipelines on the coating material feed system into Mouth corresponds connection；

Product cools down stocking system, is connected to by material receiving tube with the discharge port of the coating cylinder, for particle after being coated The cooling storage of fertilizer.

Further, granulated fertilizer heating feed system include the first vibration elevator, the first blower, heat exchanger and Raw material cabin；First blower is connect by the heat exchanger with the vibration elevator, for into the vibration elevator Blast hot wind；The vibration elevator is connect with the feed inlet of the raw material cabin, the discharge port of the raw material cabin by it is described into Expects pipe is connected to the feed inlet of the coating cylinder, and the discharge outlet of the raw material cabin is provided with metering pump.

Further, the coating material feed system includes the first dissolving tank, the second dissolving tank, the first flush coater and the Two flush coaters；The outlet of first dissolving tank is connect with the import of first flush coater, the outlet of first flush coater With the inlet communication of a delivery pipe；The outlet of second dissolving tank is connected with the import of second flush coater, described The outlet of second flush coater and the inlet communication of another delivery pipe.

Further, the cooling stocking system of the product includes the second vibration elevator, the second blower and finished product bin, institute The discharge port for stating coating cylinder is connect by the material receiving tube with the second vibration elevator, and the second vibration elevator is logical Feed pipe is crossed to connect with finished product bin；Second blower is connect by pipeline with the second vibration elevator, for shaking to second Cold wind is blasted in dynamic elevator.

The invention adopts the above technical scheme, has the advantages that have in dedicated coating cylinder of the invention and successively go here and there The multistage coating chamber of connection and the discharge chamber that chamber is coated with afterbody, and per shape between adjacent two coatings chamber At there is helical buffer runner；In coating process, granulated fertilizer sequentially rotates between multistage coating chamber, so that granulated fertilizer With coating solution can be more uniform contact, meanwhile, granulated fertilizer it is adjacent two coating chamber between rotate when need guiding through spiral Buffer runner can effectively avoid the blending of different coating chamber granulated fertilizers；In the premise for guaranteeing granulated fertilizer coating quality Under, coating yield is improved, drawback existing in the prior art is overcome.

Correspondingly, the coating equipment in sugar production line based on dedicated coating cylinder, can greatly improve coating quality and yield.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the dedicated coating cylinder of the present invention；

Fig. 2 is the external structure schematic diagram of the dedicated coating cylinder of the present invention；

Fig. 3 is the schematic diagram of internal structure of the dedicated coating cylinder of the present invention；

Fig. 4 is the distributed architecture schematic diagram of present invention coating cylinder inside spin water conservancy diversion leaf；

Fig. 5 is the positive structure diagram of the dedicated coating cylinder of the present invention；

Fig. 6 is the A-A of Fig. 5 to structural schematic diagram；

Fig. 7 is the partial enlargement structural representation on Fig. 5 at D；

Fig. 8 is the dedicated coating cylinder side structure schematic view of the present invention；

Fig. 9 is the structural schematic diagram in present invention coating cylinder under isolation board opening state；

Figure 10 is the structural schematic diagram of isolation board of the present invention；

Figure 11 is the partial enlargement structural representation at the C of Figure 10；

Figure 12 is the overall structure diagram of coating equipment in sugar production line of the present invention.

Specific embodiment

The present invention is described in detail below with reference to the accompanying drawings and embodiments.It should be appreciated, however, that the offer of attached drawing is only For a better understanding of the present invention, they should not be interpreted as limitation of the present invention.

As shown in figures 1-4, the embodiment provides a kind of dedicated coating cylinders comprising: erecting bed 1；

It is coated cylinder 2, is in seal tubular structure, there are feed inlets 22 on the front end-plate 21 of coating cylinder 2, are coated cylinder 2 End plate 23 on there are discharge port 24, be coated cylinder 2 and horizontally rotate and be arranged on erecting bed 1；

Central tube 3, central tube 3 are coaxially threaded through on coating cylinder 2, and coating cylinder 2 is stretched out at the both ends of central tube 3 respectively Outside, also, the both ends of central tube 3 pass through the support of fixed frame 6 respectively and are arranged on erecting bed 1；

Multiple isolation boards 4, multiple isolation are arranged along the axis direction interval of central tube 3 in coating cylinder 2 in isolation board 4 Plate 4 is set in the outside of central tube 3 and is fastenedly connected with it；The inside for being coated cylinder 2 is separated out multiple skies by multiple isolation boards 4 Between, the multistage coating chamber 25 being sequentially connected in series is formed in coating cylinder 2 and is gone out with what afterbody coating chamber 25 was connected to Expect chamber 26；The opening and closing type window (not shown) passed through for material is formed on each isolation board 4；

Two spiral stream guidance leaves 5 are fixedly installed on the central tube 3 between every adjacent two isolation board 4 in spiral stream guidance leaf 5, and Two spiral stream guidance leaves 5 are interspersed around the circumferential direction of central tube 3, and then form spiral between adjacent two-stage coating chamber 25 and delay Swash of wave road 7.

The working principle of the dedicated coating cylinder of the present embodiment is as follows: coating cylinder 2 at the uniform velocity operates, and material is from coating cylinder 2 Feed inlet 22 enters in first order coating chamber 25, after completing the coating for the first time of granulated fertilizer in first order coating chamber 25, The window on isolation board 4 is opened, the granulated fertilizer in first order coating chamber 25 after coating flows through helical buffer runner 8 and enters the In two coating chambers 25, meanwhile, external virgin material enters the first order by feed inlet 22 and is coated in chamber 25；Due to helical buffer stream Road 8 has certain length, and the granulated fertilizer in first order coating chamber 25 after coating can be made to be introduced into spiral unhurried current runner 8, It is gradually shifted again into second level coating chamber 25, so as to effectively avoid the material after being coated in first order coating chamber 25 With the blending of virgin material；When granulated fertilizer after being coated in first order coating chamber 25 all flows into second level coating chamber 25, The window on isolation board 4 is closed, at this point, carrying out granulated fertilizer coating in first, second grade of coating chamber 25 simultaneously；Coating is completed Afterwards, the window on isolation board 4 is opened, the granulated fertilizer that secondary coating is completed in second level coating chamber 25 enters third level coating In chamber 25, the granulated fertilizer being coated for the first time is completed in first order coating chamber 25 and enters the second coating chamber 25, external virgin material By feed inlet 22 enter the first order be coated chamber 25 in, when material transfer after the completion of, close isolation board 4 on window, first, Second and third level coating chamber 25 in carry out granulated fertilizer coating simultaneously；After the completion of coating, aforesaid operations, the third level are repeated The granulated fertilizer for completing to be coated three times in coating chamber 25 enters fourth stage coating chamber 25, and the second level, which is coated in chamber 25, completes The granulated fertilizer of secondary coating enters in third level coating chamber 25, completes the particle being coated for the first time in first order coating chamber 25 Fertilizer enters the second coating chamber 25, and external virgin material enters the first order by feed inlet 22 and is coated in chamber 25；And so on, when Afterbody is coated the coating that granulated fertilizer is completed in chamber 25, and afterbody is coated the coated granule fertilizer in chamber 25 through going out When expecting that chamber 26, discharge port 24 flow out, dedicated coating cylinder enters optimum Working and (completes the coated cylinder being repeatedly coated The granulated fertilizer of 2 discharge port outflow reaches balance with the virgin material entered in coating cylinder 2 through feed inlet 22), entire spectacle case Clothing cylinder improves coating yield, the drawbacks of effectively overcoming in the prior art under the premise of guaranteeing coating quality.

In the above-described embodiments, it is preferred that isolation board 4 is round isolation board, and the outer diameter of isolation board 4 is slightly less than coating cylinder 2 internal diameter can rub in this way to avoid the outer peripheral edge of isolation board 4 and the inner wall of coating cylinder 2.

In the above-described embodiments, it is preferred that as shown in Fig. 3, Fig. 6, covered on the central tube 3 between adjacent two isolation board 4 Set a taper discharge barrel 8, taper discharge barrel 8 is fixedly connected with two spiral stream guidance leaves 5 so that spiral unhurried current channel 7 outlet with The undergauge discharge port 81 of taper discharge barrel 8 is connected to；Lead in this way, the granulated fertilizer in upper level coating chamber 25 flows through spiral unhurried current Road 7, and the undergauge discharge port 81 through taper discharge barrel 8 enters in next stage coating chamber 25, can effectively avoid granulated fertilizer Reflux.

In the above-described embodiments, it is preferred that as shown in figure 5, along the internal perisporium of coating cylinder 2 in each coating chamber 25 Multiple lifting blades 9 are arranged in interval, and are distributed between adjacent two lifting blade 9 in splayed；In this way, being coated cylinder 2 when being coated When rotation, reciprocal flowing occurs for the runner that granulated fertilizer can be formed between lifting blade 9, and coating solution is more uniformly sprayed It is mapped on granulated fertilizer, improves the coating quality of granulated fertilizer.

In the above-described embodiments, it is preferred that as shown in figs. 8-10, isolation board 4 include along central tube 3 circumferencial direction it is equal Multiple fan-shaped hinges 41 of even distribution, and it is set in the Circular Plate 42 outside the outer peripheral edge 411 of multiple fan-shaped hinges 41；It is each Rotation setting first connecting rod 43 between the inner peripheral 412 of fan-shaped hinge 41 and the periphery wall of central tube 3, each sector hinge 41 Outer peripheral edge 411 and Circular Plate 42 internal perisporium between rotation the second connecting rod 44 of setting, to constitute in hinge window construction Isolation board 4.

In the above-described embodiments, it is preferred that as shown in fig. 7, to improve the outer peripheral edge of isolation board 4 and being coated the interior of cylinder 2 Two circular ring shape partitions 10, the periphery of each circular ring shape partition 10 is arranged in the two sides of each isolation board 4 in leakproofness between peripheral wall Edge is fixed on the internal perisporium of coating cylinder 2, and the internal diameter of each circular ring shape partition 10 is less than the outer diameter of isolation board 4.

In the above-described embodiments, it is preferred that as shown in figure 11, the invention also includes the fans for controlling multiple isolation boards 4 The driving mechanism 11 of 41 synchronous on-off of shape hinge；Driving mechanism 11 includes drive rod 111, connecting shaft 112 and link block 113；It passes Lever 111 is movably plugged in central tube 3, and one end of drive rod 111 is stretched out the outside of central tube 3 and (schemed with actuator In be not shown) connection, actuator is for driving drive rod 111 to move back and forth in central tube 3；Corresponding with each isolation board 4 Drive rod 111 outer circumference surface on interval multiple connecting shafts 112, the number and the sector on isolation board 4 of connecting shaft 112 are set The number of hinge 41 is identical, and one end of each connecting shaft 112 is fixed on the outer circumference surface of drive rod 111, each connecting shaft 112 The other end be rotatablely connected a link block 113, each first connecting rod 43 be located at central tube 3 inside one end and link block 113 are fixedly connected；In use, starting actuator, actuator drive drive rod 111 to move back and forth in central tube 3, link block is driven 113 around 112 reciprocating rotation of connecting shaft, and then realizes 41 synchronous on-off of fan-shaped hinge on multiple isolation boards 4.

In above-described embodiment, it is preferred that cylinder or hydraulic cylinder can be used in actuator.

In the above-described embodiments, it is preferred that the invention also includes the driving devices for driving coating cylinder 2 to rotate, and drive Dynamic device includes being fixed at coating 2 outer wall of cylinder equipped with gear band 12, the motor 13 being fixed on erecting bed 1, Setting and 12 meshed gears (not shown) of gear band on the output end of motor 13.

In the above-described embodiments, it is preferred that insulating layer is arranged in external in coating cylinder 2, guarantees 2 inside temperature of coating cylinder Degree in a certain range, avoids being coated the adhesion that hot and cold alternation inside and outside cylinder 2 causes granulated fertilizer.

In the above-described embodiments, it is preferred that for convenience of to coating cylinder 2 inside carry out cleaning maintenance, each coating chamber There are manhole (not shown)s on 25 outer wall.

As shown in Fig. 5, Fig. 6, Figure 12, another embodiment of the present invention provides continuous reaction form a film coating equipment in sugar production line, comprising:

The dedicated coating cylinder of above-mentioned any embodiment,

Granulated fertilizer heat feed system 100, by feed pipe 16 with coating cylinder 2 feed inlet 22 be connected to, be used for pair Granulated fertilizer before coating carries out heating and thermal insulation；

Spray equipment 101, including delivery pipe 1011, spray tube 1012 and spray head 1013；Two conveying of setting in central tube 3 Pipe 1011 installs two spray tubes 1012, two spray tubes 1012 and two delivery pipes on the central tube 3 in each coating chamber 25 Discharging interface on 1011 corresponds connection, is equipped with spray head 1013 on each spray tube 1012；

Coating material feed system 102, two material outlets and two conveying pipelines 1011 on coating material feed system 102 Import corresponds connection；

Product cools down stocking system 103, is connected to by material receiving tube 17 with the discharge port 24 of coating cylinder 2, after being coated The cooling storage of granulated fertilizer.

Further, fan-shaped atomized spray head can be used in spray head 1013.

Further, granulated fertilizer heating feed system 100 includes vibration elevator 1001, blower 1002, heat exchanger 1003 and raw material cabin 1004, blower 1002 connect by heat exchanger 1003 with vibration elevator 1001, is used for shaking elevator Hot wind is blasted in 1001, vibration elevator 1001 is connect with the feed inlet of raw material cabin 1004, and the discharge port of raw material cabin 1004 passes through Feed pipe 16 is connected to the feed inlet 22 of coating cylinder 2.

Further, the discharge outlet of raw material cabin 1004 is provided with metering pump, raw material cabin 1004 is controlled by metering pump To the inventory of coating cylinder 2, guarantee accurately feeds intake.

Further, coating material feed system 102 includes the first dissolving tank 1021, the spray of the second dissolving tank 1022, first Painting machine 1023 and the second flush coater 1024；The outlet of first dissolving tank 1021 is connect with the import of the first flush coater 1023, and first The inlet communication of the outlet of flush coater 1023 and a conveying pipeline (1011)；The outlet of second dissolving tank 1022 and the second flush coater 1024 import connection, the outlet of the second flush coater 1024 and the inlet communication of another conveying pipeline (1011).

Further, the cooling stocking system 103 of product includes vibration elevator 1031, blower 1032 and finished product bin 1033, the discharge port 24 of coating cylinder 2 is connect by material receiving tube 17 with vibration elevator 1031, and vibration elevator 1031 is by sending Expects pipe 18 is connect with finished product bin 1033；Blower 1032 is connect by pipeline with vibration elevator 1031, for being promoted to vibration Cold wind is blasted in machine 1031；The timely cooling for realizing granulated fertilizer after being coated prevents the caking at high temperature of fertilizer, guarantees product matter Amount.

The present invention is only illustrated with above-described embodiment, and structure, setting position and its connection of each component are all can have Changed.Based on the technical solution of the present invention, the improvement or equivalent that all principles according to the present invention carry out individual part Transformation, should not exclude except protection scope of the present invention.

Claims (10)

1. a special-purpose coating tube, comprising a mounting platform (1), is characterized in that, also comprises: The coating cylinder (2) is horizontally rotated and arranged on the mounting table (1); a central pipe (3), the central pipe (3) is coaxially threaded on the coating cylinder (2), and the two ends of the central pipe (3) respectively protrude from the coating cylinder (2) ) outside, and the two ends of the central pipe (3) are respectively supported on the mounting table (1) by the fixing frame (6); an isolation plate (4), a plurality of the isolation plates (4) are distributed at intervals along the axial direction of the central pipe (3), and are arranged between the coating cylinder (2) and the central pipe (3), The interior of the coating cylinder (2) is divided into a plurality of spaces, and an openable and closable window is formed on each of the isolation plates (4), so that a plurality of spaces in the coating cylinder (2) are formed. The spaces are connected in series with each other, so that in the coating cylinder (2), a multi-stage coating chamber (25) connected in series and a discharge chamber ( 26); Spiral guide vanes (5), two of the spiral guide vanes (5) are fixedly arranged on the central pipe (3) between each adjacent two isolation plates (4), and the two spiral guide vanes (5) are provided. The flow vanes (5) are distributed in a staggered manner around the circumference of the central tube (3), thereby forming a spiral buffer flow channel (7) between two adjacent coating chambers (25). 2. A special coating barrel according to claim 1, characterized in that: the coating barrel (2) is in a sealed barrel structure, and the front end plate (21) of the coating barrel (2) A feeding port (22) is left on the top, and a discharging port (24) is left on the rear end plate (23) of the coating cylinder (2); the isolation plate (4) is a circular isolation plate, so The outer diameter of the separating plate (4) is smaller than the inner diameter of the coating cylinder (2). 3. A special-purpose coating drum according to claim 1, characterized in that: a conical discharge drum ( 8), the conical discharge cylinder (8) is fixedly connected with the two spiral guide vanes (5), so that the outlet of the spiral slow-flow channel (7) is connected to the conical discharge cylinder (8) A plurality of lifting plates (9) are arranged at intervals along the inner peripheral wall of the coating cylinder (2) in each of the coating chambers (25). The two adjacent lifting plates (9) are distributed in a figure-eight shape. 4. A special coating cartridge according to claim 1, characterized in that: the isolation plate (4) is in the form of a hinged window, and the isolation plate (4) comprises a a plurality of fan-shaped hinges (41) evenly distributed in the circumferential direction, and a circular ring plate (42) sleeved on the outer periphery (411) of the plurality of said fan-shaped hinges (41); each said fan-shaped hinge A first connecting rod (43) is rotatably arranged between the inner peripheral edge (412) of (41) and the outer peripheral wall of the central tube (3). A second connecting rod (44) is rotatably arranged between the inner peripheral walls of the annular plate (42). 5. A special coating cartridge according to claim 4, characterized in that: two annular partition plates (10) are arranged on both sides of each said partition plate (4), and each said annular partition The outer peripheral edge of the annular partition plate (10) is fixed on the inner peripheral wall of the coating cylinder (2), and the inner diameter of each annular partition plate (10) is smaller than the outer diameter of the partition plate (4). . 6. A special coating cartridge according to claim 4, characterized in that: further comprising a drive mechanism (11) for controlling the synchronous opening and closing of the fan-shaped hinges (41) of the plurality of said isolation plates (4). ; The drive mechanism (11) comprises a transmission rod (111), a connecting shaft (112) and a connecting block (113); the transmission rod (111) is movably inserted in the central tube (3), the One end of the transmission rod (111) protrudes from the outside of the central tube (3) and is connected with a driving member, and the driving member is used to drive the transmission rod (111) to reciprocate in the central tube (3); A plurality of the connecting shafts (112) are arranged at intervals on the outer circumferential surface of the transmission rod (111) corresponding to each of the isolation plates (4), and the number of the connecting shafts (112) is equal to the number of the isolation plates The number of the fan-shaped hinges (41) on (4) is the same, and one end of each of the connecting shafts (112) is fixedly connected to the outer circumferential surface of the transmission rod (111). The other end of the shaft (112) is rotatably connected to one of the connecting blocks (113), and one end of each of the first connecting rods (43) located inside the central tube (3) is fixed to the connecting block (113) connect. 7. A continuous reaction film-forming coating equipment based on the special-purpose coating drum of any one of claims 1 to 6, characterized in that, comprising: A granular fertilizer heating and supplying system (100) communicated with the feeding port (22) of the coating cylinder (2) through a feeding pipe (16); A spraying device (101), comprising a conveying pipe (1011), a spraying pipe (1012) and a spraying head (1013); two conveying pipes (1011) are arranged in the central pipe (3), in each of the conveying pipes (1011) Two spray pipes (1012) are installed on the central pipe (3) in the coating chamber (25), and the two spray pipes (1012) are connected to the discharge ports on the two conveying pipes (1011). One-to-one communication, each of the spray pipes (1012) is provided with a spray head (1013); a coating material supply system (102), wherein the two material outlets on the coating material supply system (102) are in one-to-one correspondence with the inlets of the two material conveying pipes (1011); The product cooling storage system (103) is communicated with the outlet (24) of the coating cylinder (2) through the feeding pipe (17), and is used for cooling and storage of the coated granular fertilizer. 8. The continuous reaction film-forming coating equipment according to claim 7, wherein the granular fertilizer heating and supplying system (100) comprises a first vibration elevator (1001), a first fan (1002) , a heat exchanger (1003) and a raw material silo (1004); the first fan (1002) is connected to the first vibration elevator (1001) through the heat exchanger (1003), and is used to send the Hot air is blown into a vibrating elevator (1001); the first vibrating elevator (1001) is connected to the feeding port of the raw material silo (1004), and the discharging port of the raw material silo (1004) passes through the The feeding pipe (16) is communicated with the feeding port (22) of the coating cylinder (2), and a metering pump is provided at the discharging port of the raw material bin (1004). 9. The continuous reaction film-forming coating equipment according to claim 7, wherein the coating material supply system (102) comprises a first dissolving tank (1021) and a second dissolving tank (1022) , a first spraying machine (1023) and a second spraying machine (1024); the outlet of the first dissolving tank (1021) is connected to the inlet of the first spraying machine (1023), the first spraying machine (1023) ) outlet is communicated with an inlet of the conveying pipe (1011); the outlet of the second dissolving tank (1022) is connected with the inlet of the second spraying machine (1024), the second spraying machine (1024) The outlet is communicated with the inlet of the other said delivery pipe (1011). 10. A continuous reaction film-forming coating equipment according to claim 7, characterized in that: the product cooling storage system (103) comprises a second vibration elevator (1031), a second fan (1032) and The finished product silo (1033), the outlet (24) of the coating cylinder (2) is connected to the second vibration elevator (1031) through the material receiving pipe (17), and the second vibration The elevator (1031) is connected to the finished product silo (1033) through the feeding pipe (18); the second fan (1032) is connected to the second vibration elevator (1031) through the pipeline, and is used for sending the second vibration elevator to the second vibration elevator (1031). (1031) is blown into the cold air.