CN107442042B

CN107442042B - Shearing ring die granulator

Info

Publication number: CN107442042B
Application number: CN201710729981.7A
Authority: CN
Inventors: 秦能; 郑伟; 刘晶; 马宁; 李萌; 李世伟; 高洪海
Original assignee: Xian Modern Chemistry Research Institute
Current assignee: Xian Modern Chemistry Research Institute
Priority date: 2017-08-23
Filing date: 2017-08-23
Publication date: 2019-12-10
Anticipated expiration: 2037-08-23
Also published as: CN107442042A

Abstract

The invention discloses a shearing ring die granulating device which comprises a motor 13, a belt pulley 2, a gear box 3, a main shaft 4, a ring die 5, a compression roller 6, a cutter 7, a feeding hole 8, a discharging hole 12, a metering feeder 9, a protective cover 10, a circulating water pipe 1, a base 11, trundles 14 and the like. Two ends of the main shaft 4 are respectively connected with the belt pulley 2 and the press roller 6, and a main shaft gear is nested in the middle. The main shaft gear 18, the planetary gear 19 and the inner gear ring 20 are sequentially meshed, the inner gear ring 20 is provided with a ring die mounting disc 21, and the ring die 5 is connected to the ring die mounting disc 21 through a hoop, so that the ring die is convenient to disassemble, assemble and clean. The compression roller 6 is connected with the involute spline of the main shaft 4, and is convenient to assemble and disassemble. The press roller 6 is of a double-cam structure, so that radial force can be eliminated conveniently. Set up the hydrologic cycle passageway, realize the heating or the heat preservation to the material, improve production efficiency. The rotating speed ratio of the ring die 5 to the press roll 6 is constant, and the rotating speed is adjustable. The metering feeder 9 adjusts the feeding amount according to the current. The ring die 5 and the press roll 6 are combined in various ways, and the material application range is wide.

Description

Shearing ring die granulator

Technical Field

The invention relates to a granulating device capable of heating powdery or granular materials and processing the powdery or granular materials into cylindrical granular materials, in particular to a ring die granulator capable of being assembled and disassembled quickly. Belongs to the technical field of manufacturing and processing of shearing, granulating and forming equipment.

Background

The ring die granulator has the characteristics of simple structure, high efficiency, strong material applicability and the like, and is widely used, and the main working principle of the granulator is that the ring die and the compression roller rotate in the same direction but have speed difference, so that materials in a wedge-shaped gap between the ring die and the compression roller are subjected to shearing extrusion force, the materials are gradually extruded into forming holes on the ring die for forming and are continuously extruded out of the outer end, a forming material column is cut into required length by a cutter, and finally, forming particles are discharged from a discharge hole.

In the currently used ring die granulator, a ring die is connected with a transmission mechanism through a bolt, and a compression roller is nested on another transmission bearing. After the granulation is finished, the die needs to be cleaned, and the cleaning is difficult because the ring die and the compression roller are fixedly installed and the inner space of the ring die is small. Secondly, in the granulation process, the materials need to be heated to improve the plasticity and the curing degree of the materials, so as to facilitate the granulation. The heating mode adopted at present is to add a conditioning mechanism, wherein steam is introduced to heat materials. The heating mode has low heat transfer efficiency and large energy consumption. Thirdly, the existing feeder cannot detect the material amount in the ring die, once the forming hole of the ring die is blocked, the material is accumulated, if the material is not found timely, the more the material is accumulated, the ring die and the compression roller are finally blocked, and even a motor is burnt, so that the production is seriously influenced. Thirdly, the ring die of the ring die granulator used at present actively rotates, and the compression roller is driven by no external power and is driven by follow-up motion. Has no shearing action or weaker shearing action on the materials. Or two motors are used for driving although the ring mould and the press roll rotate simultaneously (for example, patent ZL200910033585.6, a ring mould granulator). In addition, the structural design of the currently used shearing granulator and the structural design of a compression roller, such as a single-wheel structure, a double-wheel structure or a three-wheel structure, can not eliminate radial force during extrusion.

Aiming at the problems and the defects in the prior art, the invention designs the shearing ring die granulator which can realize quick assembly and disassembly and is convenient to clean, a heating water channel is designed in the granulator, materials are heated in the granulating process, the heating efficiency is improved, a quantitative material quantity control device is designed, quantitative feeding is realized, the granulation system is prevented from being blocked, and a double-cam compression roller structure is designed to eliminate the radial force in the granulating process.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the shearing ring die granulator which is quick to disassemble and assemble, has a heating water jacket, has quantitative material control and a shearing function and can eliminate radial force.

In order to achieve the technical purpose, the invention adopts the following technical scheme: a shearing ring die granulator is composed of a motor, a belt pulley, a gear box, a main shaft, a ring die, a compression roller, a cutter, a feeding hole, a discharging hole, a metering feeder, a protective cover, a circulating water pipe, a base, trundles and the like. The motor, the gear box and the metering feeder are arranged on the base. One end of the main shaft is connected with the belt pulley, and the other end of the main shaft is connected with the press roller. The transmission chain of the gear box is composed of a main shaft gear, a planetary gear and an inner gear ring, the main shaft gear is installed on the main shaft and meshed with the planetary gear, the planetary gear is meshed with the inner gear ring, an annular die installation disc is arranged on the inner gear ring, and the annular die is connected to the annular die installation disc through a hoop. The compression roller is connected with the main shaft involute spline.

Further, the motor-driven reducer drives the main shaft and the inner gear ring to drive the ring die and the press roller to move oppositely through the synchronous belt pulley, and shearing, extruding and granulating are completed.

furthermore, the ring mould is of a split structure and is connected with the ring mould mounting disc through a hoop.

Furthermore, the compression roller is of a double-cam symmetrical structure, so that radial force can be eliminated conveniently.

Furthermore, the circumference of the ring die is provided with forming holes for forming the material. According to the size of the forming hole, a series of ring molds are designed, the diameter of the forming hole is 5 mm-10 mm, and the ring molds are arranged by entering 1 gear according to 0.5mm or 1 mm.

Furthermore, a water channel is arranged in the protective cover and the press roller and is connected with a hot water system through a circulating water pipe, so that the materials are heated.

Further, the rotating speed ratio of the ring die to the pressing roller is constant, and the rotating speed of the ring die to the pressing roller can be adjusted by adjusting the rotating speed of a motor through a frequency converter.

Furthermore, the start/stop of the metering feeder is related to the material amount in the inner cavity of the granulator and the current of the motor, when the metering feeder is started, the material is added into the inner cavity of the granulator through the metering feeder, when the material in the inner cavity is enough, the load of the driving motor is increased, the current of the motor is increased, the current sensor detects and transmits a signal, and the feeder stops working. When the current is reduced to a set lower limit, the charging machine is restarted.

Furthermore, the protective cover adopts the connection modes of a hinge, a butterfly nut, an eyelet bolt and the like.

Furthermore, the minimum clearance between the ring die and the press roll is 2.5 mm-10 mm.

Furthermore, the rotating speed of the ring die is 1 rpm-15 rpm; the rotating speed of the press roll is 2 rpm-30 rpm.

Furthermore, water can be introduced into the circulating water pipe, and the temperature of the water is 15-95 ℃; water may not be passed through.

Furthermore, the base is provided with a caster wheel, so that the moving operation is convenient.

After the technical scheme is adopted, the invention has the following beneficial effects:

(1) the ring die and the compression roller move simultaneously, so that the probability of machine blockage is reduced; and one motor drives the ring die and the compression roller simultaneously, so that one motor is reduced, the structural space is saved, and the design of the whole machine is simpler and more compact.

(2) The hoop is adopted for installing the ring die, the ring die is designed to be of a split structure, the ring die is quickly assembled and disassembled, and cleaning is facilitated.

(3) And the compression roller with a double-cam symmetrical structure is adopted, so that the radial force can be eliminated.

(4) In order to adapt to granulation of different materials and adjustment of the size of the granules, a series of ring dies are designed according to the size of the forming hole on the ring die, so that the ring die is convenient to replace at any time. The compression rollers are also designed into different series, so that the compression rollers can be conveniently replaced according to different materials, and the requirement that the minimum clearance between the ring die and the compression rollers is 2.5-10 mm is met. The design has wide material application range.

(5) In order to meet the requirements of different materials on temperature, a circulating water channel is arranged, hot water is introduced into a main shaft in a water heating mode, the interior of a bidirectional cam is introduced, a bidirectional cam compression roller is heated, a protective cover is arranged in a double-layer water jacket mode, and the materials are heated or insulated through heat conduction of the cam compression roller and heat radiation of the double-layer water jacket of the protective cover. A temperature sensor is arranged on the hot water circulation loop to monitor the heating temperature, and an asbestos heat insulation layer is arranged on the outer layer of the protective cover to prevent heat loss, so that the accuracy of the heating temperature and the heating efficiency are improved.

(6) The rotating speed ratio of the ring die to the press roll is constant, and the rotating speed can be adjusted by adjusting the rotating speed of the motor through a frequency converter.

(7) A metering feeder is used and is started/stopped in connection with the motor current. The materials in the ring die are increased and extruded to be solid, the current of the motor is gradually increased, and the feeding device automatically stops feeding after the current is increased to the set upper limit. The material accumulation caused by excessive material in the ring die is favorably prevented, and particularly, the motor is favorably protected and prevented from being overloaded under the abnormal conditions of material blockage of a forming hole and the like.

(8) The protective cover adopts the connection modes of a hinge, a butterfly nut, an eyelet bolt and the like, and is convenient to disassemble, assemble and clean.

(9) The rotating speed of the ring die is 1-15 rpm; the rotating speed of the press roll is 2-30 rpm. The application range is wide.

(10) The base is provided with the caster wheels, so that the moving operation is convenient.

Drawings

FIG. 1 is a schematic view of the installation of a shearing ring die pelletizer in accordance with the present invention.

FIG. 2 is a schematic view of the structure of a ring die and a compression roller of the shearing ring die granulator according to the present invention.

FIG. 3 is a schematic view of the gear box transmission chain structure of the shearing ring die granulator according to the present invention.

In the figure: 1. the device comprises a circulating water pipe, 2, a belt pulley, 3, a gear box, 4, a main shaft, 5, a ring die, 6, a compression roller, 7, a cutter, 8, a feeding hole, 9, a metering feeder, 10, a protective cover, 11, a base, 12, a discharging hole, 13, a motor, 14, an industrial caster, 15, a water nozzle, 16, a sandwich water jacket, 17, a compression roller water channel, 18, a main shaft gear, 19, a planetary gear, 20, an inner gear ring, 21 and a ring die mounting disc.

Detailed Description

The invention is further described with reference to the drawings and the detailed description.

As shown in fig. 1, 2 and 3, the shearing ring die granulator of the present invention includes a motor 13, a belt pulley 2, a gear box 3, a main shaft 4, a ring die 5, a compression roller 6, a cutter 7, a feed inlet 8, a discharge outlet 12, a metering feeder 9, a shield 10, a circulating water pipe 1, a base 11, an industrial caster 14, etc. The motor 13, the gear box 3 and the metering feeder 9 are arranged on the base 11. One end of the main shaft 4 is connected with the belt pulley 2, the other end of the main shaft is connected with the press roller 6, a transmission chain of the gear box 3 is composed of a main shaft gear 18, a planetary gear 19 and an inner gear ring 20, the main shaft gear 18 is installed on the main shaft 4, the main shaft gear 18 is meshed with the planetary gear 19, the planetary gear 19 is meshed with the inner gear ring 20, a ring die installation disc 21 is arranged on the inner gear ring 20, and the ring die 5 is connected to the ring die installation disc 21 through a clamping hoop. And the compression roller 6 is connected with the involute spline of the main shaft 4.

The principle of the shearing ring die granulator is that materials enter a cavity formed by a ring die 5 and a compression roller 6 from a feeding hole 8 through a metering feeder 9, a motor 13 drives a speed reducer to drive a main shaft 4 and an inner gear ring 20 through a synchronous belt pulley 2 and simultaneously drive the ring die and the compression roller 6 to move in opposite directions, the materials are extruded from a forming hole of the ring die 5 by shearing extrusion, and are cut by an upper cutter 7 and a lower cutter 7 to form particles which are discharged from a discharge hole 12. The on/off of the doser 9 is linked to the current of the motor. As the material in the ring die 5 is increased and extruded to be compact, the current of the motor 13 is gradually increased, and after the current is increased to the set upper limit, the metering feeder 9 automatically stops feeding. Is favorable for preventing the material accumulation caused by excessive material in the ring die.

A circulating water channel 1 is arranged, hot water is introduced into a main shaft 4 in a water heating mode and is introduced into a bidirectional cam, a heating press roller 6 and a protective cover 10 are arranged in a double-layer water jacket mode, and the hot water is introduced. The material is heated by heat conduction and heat radiation. And setting the proper hot water temperature according to the material performance. The temperature range is 15-95 ℃; water may not be passed through.

When the ring die works normally, the minimum clearance between the ring die 5 and the press roll 6 is 2.5 mm-10 mm according to the material performance; the rotating speed of the ring die 5 is 1-15 rpm; the rotating speed of the press roll 6 is 2 rpm-30 rpm.

The performance of the present invention is compared with that of the prior art apparatus shown in Table 1.

Table 1 comparison of the performance of the present invention with existing equipment

Comparing items	Existing apparatus	Apparatus of the invention	Comparison results
				Production time/batch	35 minutes	27 minutes	The production efficiency is improved by 22.9 percent
Cleaning time	180 minutes	45 minutes	The cleaning time is reduced to 1/4
				Total production time/batch	335 minutes	192 minutes	The total production time is reduced to 57 percent of the original production time

Because a double-cam compression roller structure is adopted, radial stress is eliminated; the quick-release type butterfly valve is convenient to disassemble and clean by adopting connection modes such as quick-release, clamping hoop, hinge, butterfly nut and movable joint bolt. By adopting the optimized water channel design and temperature control, the material heating efficiency and the accuracy of temperature control are improved. The quantitative feeding device, the ring die and the compression roller are simultaneously driven, so that the probability of machine blockage is reduced, and the production efficiency is improved; the rotating speed of the ring die and the compression roller is adjustable, and the gap between the ring die and the compression roller is adjustable, so that the shearing ring die granulation is wide in material application range. The die and the press roll move simultaneously, so that the shearing acting force on the material is enhanced, and the probability of machine blockage is reduced; and one motor drives the ring die and the compression roller simultaneously, so that one motor is reduced, the structural space is saved, and the design of the whole machine is simpler and more compact. The base is provided with the caster wheels, so that the moving operation is convenient.

Claims

1. The utility model provides a shearing ring die granulator, its includes motor (13), belt pulley (2), gear box (3), main shaft (4), ring die (5), compression roller (6), cutter (7), feed inlet (8), discharge gate (12), measurement charging means (9), protection casing (10), circulating water pipe (1), base (11), truckle (14), its characterized in that: the motor (13), the gear box (3) and the metering feeder (9) are arranged on the base (11); one end of the main shaft (4) is connected with the belt pulley (2), the other end of the main shaft is connected with the press roller (6), a transmission chain of the gear box (3) is composed of a main shaft gear (18), a planetary gear (19) and an inner gear ring (20), the main shaft gear (18) is installed on the main shaft (4), the main shaft gear (18) is meshed with the planetary gear (19), the planetary gear (19) is meshed with the inner gear ring (20), a ring die installation disc (21) is arranged on the inner gear ring (20), and the ring die (5) is connected to the ring die installation disc (21) through a hoop; the compression roller (6) is connected with the involute spline of the main shaft (4); water channels are arranged in the protective cover (10) and the press roll (6) and are connected with a hot water system through a circulating water pipe (1) to heat materials; the compression roller (6) is of a double-cam symmetrical structure;

The metering feeder (9) directly feeds materials into the inner cavity of the granulator, when the materials in the inner cavity are enough, the load of the driving motor is increased, the current of the motor is increased, the current sensor detects and transmits signals, the feeder stops working, and when the current is reduced to a set lower limit, the feeder is restarted;

The rotating speed of the ring die (5) is 2-7 rpm; the rotating speed of the press roll (6) is 3 rpm-10 rpm.

2. The shear ring die granulator of claim 1 wherein: a motor (13) drives a speed reducer to drive a main shaft (4) and an inner gear ring (20) through a synchronous belt pulley (2), and a driving ring die (5) and a compression roller (6) move in opposite directions to finish shearing, extruding and granulating.

3. The shear ring die granulator of claim 1 wherein: the ring die (5) is of a split structure and is connected by a clamp.

4. The shear ring die granulator of claim 1 wherein: forming holes are arranged on the ring die (5), a series of ring dies are designed according to the size of the forming holes, the diameter of each forming hole is 5-10 mm, and the ring dies are arranged in 1 gear according to the diameter of 0.5mm or 1 mm.

5. The shear ring die granulator of claim 1 wherein: the ratio of the rotating speed of the ring die (5) to the rotating speed of the compression roller (6) is constant, and the rotating speed can be adjusted by adjusting the rotating speed of a motor (13) through a frequency converter.

6. The shear ring die granulator of claim 1 wherein: the protective cover is connected by a hinge, a butterfly nut or a movable joint bolt.

7. A shear ring die granulator according to any of claims 1 to 6, characterized in that: the minimum clearance between the ring die (5) and the press roll (6) is 2.5 mm-10 mm.

8. A shear ring die granulator according to any of claims 1 to 6, characterized in that: the circulating water pipe (1) is internally provided with water, and the temperature of the water is 15-95 ℃.

9. The shear ring die granulator of claim 1 wherein: the caster (14) is arranged on the base (11) and is convenient to move and operate.