CN213873433U - Microwave drying equipment - Google Patents

Abstract

The application discloses microwave drying equipment includes: a cartridge having a receiving space for receiving particulate material; the feeding mechanism is used for conveying granular materials and communicated with the air outlet of the charging barrel; the stirring mechanism is connected with the charging barrel and is used for feeding and stirring the granular materials in the charging barrel; and the microwave drying mechanism is arranged on the charging barrel and is used for drying the granular materials in the charging barrel. Compared with the prior art, this application utilizes the microwave as the heating source, carries out the drying to the granule material through lower heating temperature, has energy-conservation, high efficiency, to the little and air pollution advantage of environment heat dissipation ability.

Description

Microwave drying equipment

Technical Field

The application belongs to the technical field of microwave drying, and particularly relates to microwave drying equipment.

Background

In the production and processing of products such as plastics, if granules such as plastics contain high moisture, the size precision and the product quality of parts are greatly influenced, and even the parts are scrapped. Therefore, it is necessary to dry the pellets of plastic or the like having high water absorbability before molding the parts.

In order to reduce the moisture in the material particles, drying measures are generally adopted in the industry before injection molding, an electric heating tube oven or a hot air oven is generally adopted, the air in the oven is heated by an electric heating wire, and meanwhile, an air blower is adopted to blow the generated heat into a drying device to dry the particles such as plastics. But it exists: the power consumption is overlarge, and the energy utilization rate is low; the drying period is long, and the production efficiency is low; the heating temperature of the particles is high, and the original performance of the particles is damaged; the drying process can continuously discharge heat and dust to the external environment, and the like.

Microwave drying is a novel drying mode. During drying, microwave energy directly acts on medium molecules to be converted into heat energy, and the microwave has penetrating performance to heat the medium inside and outside simultaneously without external heat conduction, so that the heating speed is very high, and the drying speed can be greatly shortened. Meanwhile, no matter any shape of the object, because the medium of the object is heated inside and outside simultaneously, the temperature difference inside and outside the material is small, the heating is uniform, the condition that the external coke is generated in the conventional heating process can not be generated, and the drying quality is greatly improved. Therefore, the application provides an utilize microwave as the heating source, through lower heating temperature to the granule material dry, have energy-conserving, high-efficient, to little and the little microwave drying equipment of air pollution of environment heat dissipation ability.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings or drawbacks of the prior art, the present application provides a microwave drying device.

In order to solve the technical problem, the application is realized by the following technical scheme:

a microwave drying apparatus comprising: a cartridge having a receiving space for receiving particulate material; the feeding mechanism is used for conveying granular materials and communicated with the charging barrel; the stirring mechanism is connected with the charging barrel and is used for feeding and stirring the granular materials in the charging barrel; and the microwave drying mechanism is arranged on the charging barrel and is used for drying the granular materials in the charging barrel.

Further, above-mentioned microwave drying equipment, wherein, the stirring mechanism includes: the blowing pipe, the positive pressure conveying mechanism and the air source conveying channel are arranged in a vertically through manner; the material blowing pipe is arranged in the material barrel and connected with the bottom of the material barrel, and a plurality of feeding holes are formed in the material blowing pipe; the positive pressure conveying mechanism is communicated with the bottom of the blowing pipe through the air source conveying channel.

Further, in the microwave drying equipment, a cover is further disposed on the blowing pipe, and the cover is disposed near the bottom of the blowing pipe and above the feeding hole.

Further, in the microwave drying apparatus, the cover is detachably connected to the material blowing pipe and can slide up and down along the material blowing pipe.

Further, in the microwave drying device, the material blowing pipe is further provided with a protruding structure, and the protruding structure is arranged between the material inlet hole and the cover.

Further, in the microwave drying device, the hood is a bamboo hat type hood.

Further, in the microwave drying apparatus, a bulk material tray is further installed on the top of the blowing pipe, and a particle material dispersing channel is further reserved between the top of the blowing pipe and the bulk material tray.

Further, in the microwave drying apparatus, the bulk material tray is detachably mounted on the top of the blowing pipe through a bracket.

Further, in the microwave drying apparatus, the bulk material tray is made of glass or ceramic material.

Further, in the microwave drying device, a metal nano coating is arranged on the surface of the bulk material tray.

Further, in the microwave drying equipment, the bottom of the blowing pipe is also communicated with a discharge channel.

Further, in the microwave drying equipment, the bottom of the material blowing pipe is connected with a first port of a three-way electric ball valve, a second port of the three-way electric ball valve is connected with the gas source conveying channel, and a third port of the three-way electric ball valve is connected with the material discharging channel.

Further, in the microwave drying device, the bottom of the blowing pipe is connected with the first port of the three-way electric ball valve through a connecting pipeline.

Further, in the microwave drying apparatus, the connecting pipeline has a horizontal section.

Further, the microwave drying equipment, wherein the feeding mechanism comprises: negative pressure conveying mechanism, with negative pressure transfer passage and feeder hopper that negative pressure conveying mechanism connects, wherein, negative pressure transfer passage still with the gas outlet intercommunication setting of feed cylinder, the feeder hopper pass through the inlet pipe with the feed inlet intercommunication setting of feed cylinder.

Further, in the microwave drying device, the feeding mechanism further includes a negative pressure filter box, and the negative pressure filter box is communicated with the negative pressure conveying channel.

Further, in the microwave drying apparatus, a wire mesh is disposed in the negative pressure filtering box in a horizontal, vertical or inclined manner.

Further, in the microwave drying device, the negative pressure filter box is divided into a first cavity and a second cavity by the wire mesh, wherein a first port arranged on the first cavity is communicated with a first negative pressure conveying sub-channel in the negative pressure conveying channel; and a second interface arranged on the second cavity is communicated with a second negative pressure conveying sub-channel in the negative pressure conveying channel.

Further, in the microwave drying apparatus, the negative pressure filter box is made of a transparent material.

Further, foretell microwave drying equipment, wherein, negative pressure conveying mechanism and malleation conveying mechanism adopt same air-blower, wherein, negative pressure conveying mechanism pass through negative pressure delivery channel with the malleation delivery outlet intercommunication of air-blower, malleation conveying mechanism pass through air supply delivery channel with the negative pressure delivery outlet intercommunication of air-blower.

Further, in the microwave drying device, an exhaust pipe is further arranged on the charging barrel, and a pipe orifice of the exhaust pipe is further provided with a one-way check valve.

Further, in the microwave drying device, the one-way check valve includes an outer cage and a ball, wherein the outer cage includes a receiving portion and a first cage opening, the receiving portion has a flow passage through the first cage opening and a hole provided in the outer cage, and the receiving portion is used for receiving the ball; the ball body is arranged in the accommodating part, and the outer diameter of the ball body is slightly larger than the size of the opening of the first cage opening.

Further, in the microwave drying device, one end of the outer cage is provided with a first conical structure, and a first cage opening is formed in the first conical structure; the other end of the outer cage is provided with a second conical structure, the second conical structure is also provided with a second cage opening, and the size of the opening of the second cage opening is slightly smaller than the outer diameter of the sphere; the first conical structure and the second conical structure are connected to form the outer cage, or the same connecting body of the first conical structure and the second conical structure forms the outer cage.

Further, in the microwave drying device, an included angle of the conical surface of the first conical structure is 90-2 α °, and the rolling inclination angle α is 10-20 °, where the rolling inclination angle α is an included angle between the gravity direction and the cage edge radial direction of the first conical structure.

Further, in the microwave drying device, the ball body is one of a hollow rubber ball, a light high-density sponge ball, a teflon ball, a glass ball or a steel ball.

Further, in the microwave drying device, an inner corner of the connection between the exhaust duct and the first cage opening is a smooth annular chamfer, wherein the annular chamfer forms an inner conical surface which is convenient to be tightly attached to the surface of the sphere.

Further, in the microwave drying device, the exhaust duct and the air outlet are both provided with a pipe which is lengthened inwards, and the length-diameter ratio of the pipe is greater than or equal to 2.

Further, in the microwave drying apparatus, the microwave drying mechanism includes a microwave magnetron, and the microwave magnetron is mounted on the charging barrel through a waveguide port.

Further, in the microwave drying device, a bottom of the waveguide port is covered with a teflon plate, and the waveguide port is fixed on the cover at the top of the cartridge through the teflon plate.

Further, the microwave drying device further comprises a temperature sensor, wherein the temperature sensor is arranged at the upper part of the charging barrel.

Further, the microwave drying equipment further comprises a first material level sensor and a second material level sensor, wherein the first material level sensor and the second material level sensor are arranged on the upper portion and the lower portion of the charging barrel respectively.

Further, the microwave drying equipment further comprises a control electric box, wherein the control electric box is electrically connected with the microwave magnetron, the three-way electric ball valve, the first three-way valve, the second three-way valve, the positive pressure conveying mechanism and the negative pressure conveying mechanism respectively.

Further, the microwave drying device further comprises a mounting rack with castors, and the mounting rack is used for mounting the charging barrel.

Compared with the prior art, the method has the following technical effects:

the method has the advantages of low energy consumption and high energy efficiency, and the characteristic that microwaves are heated from the inside of the water-containing particles is utilized to be matched with the blower to circulate the particles; the microwave is used as a heating source, and the granular materials are dried at a lower heating temperature, so that the energy is saved, the efficiency is high, the heat dissipation to the environment is low, and the air pollution is low;

the negative pressure filter box arranged in the feeding mechanism can increase the area to reduce the speed of the negative pressure airflow and can precipitate fine granular materials and other materials to prevent the fine granular materials and other materials from being sucked into the exhaust fan to damage the blades of the exhaust fan, so that the stable operation of the whole feeding system is ensured;

the negative pressure conveying mechanism and the positive pressure conveying mechanism can share one air blower, so that air source conveying and negative pressure pumping operation can be realized, and the investment cost of adopting separate equipment is reduced;

the drying time is short, the working efficiency is high, the time of the traditional externally heated particle material drying method can be shortened by about half, and the drying effect required by production can be achieved by adopting the drying equipment to work for 40 min-1 h through experimental determination;

the temperature of the drying process is low due to good room temperature air or N₂When the gas is circulated for turning over, the temperature is moderate in the drying process of the particles, is basically below 100 ℃, and does not damage the physical and chemical properties of the particles;

the hot air drying device has the advantages of compact integral structure, small occupied area, low equipment cost and obvious advantages compared with the traditional hot air drying equipment;

the method is not only suitable for the plastic product industry, but also can be used for drying the granular materials in other industries, such as chemical fiber, textile, medicine, grain, feed and the like, and is also suitable for the production process needing drying the granular materials.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1: the first perspective view of the microwave drying equipment is shown;

FIG. 2: a second perspective view of the microwave drying apparatus of the present application;

FIG. 3: the microwave drying equipment comprises a first longitudinal sectional view;

FIG. 4: a longitudinal section view of the microwave drying device of the application II;

FIG. 5: the working principle diagram of the stirring and drying of the granular materials in the application is shown;

FIG. 6: the structure of the microwave drying mechanism is shown schematically;

FIG. 7: the structure schematic diagram of the blowing pipe in the application;

FIG. 8: the three-dimensional structure of the one-way check valve is shown as a first structure;

FIG. 9: the use state diagram one of the structure shown in fig. 8;

FIG. 10: the second use state diagram of the structure shown in fig. 8;

FIG. 11: the three-dimensional structure diagram of the one-way check valve in the application is II;

FIG. 12: a use state diagram for the structure depicted in FIG. 11;

FIG. 13: three-dimensional structure chart of one-way check valve in this application.

Detailed Description

The conception, specific structure and technical effects of the present application will be further described in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present application.

As shown in fig. 1 to 5, the microwave drying apparatus of the present embodiment includes: a cartridge 02 having a receiving space for receiving the particulate material; the feeding mechanism is used for conveying granular materials and communicated with the charging barrel 02; the stirring mechanism is connected with the charging barrel 02 and is used for feeding and stirring the granular materials in the charging barrel 02; and a microwave drying mechanism 13 that is provided on the cylinder 02 and dries the particulate material in the cylinder 02.

The charging barrel 02 comprises a cylindrical structure 0201 arranged at the upper part and a funnel-shaped structure 0202 arranged at the lower part, the cylindrical structure 0201 and the funnel-shaped structure 0202 are smoothly connected, and the charging barrel 02 is preferably of an integrally formed structure. The inclination angle of the funnel-shaped structure 0202 is preferably around 45 °.

In this embodiment, the cylinder 02 is preferably made of stainless steel, the blowing pipe 03 is also preferably made of stainless steel, and the cylinder 02 may be made of glass pipe, which has higher hole opening cost but better wear resistance.

This embodiment still disposes a mounting bracket 01, mounting bracket 01 is used for installing barrel feed cylinder 02, barrel feed cylinder 02 can stand upright to be located on mounting bracket 01 a plurality of truckles are installed to mounting bracket 01 lower extreme so that mobile device.

An openable cover 0204 is further arranged on the upper portion of the material barrel 02, and after the cover 0204 is covered, the material barrel 02 forms a sealing space.

As shown in fig. 6, the microwave drying mechanism 13 includes a microwave magnetron 1301, and the microwave magnetron 1301 is mounted on the cartridge 02 through a waveguide port 1302.

Further, the bottom of the waveguide port 1302 is covered with a teflon plate 1303, and the waveguide port 1302 is fixed on the cover 0204 on the top of the cartridge 02 through the teflon plate 1303. Further, the teflon plate 1303 and the teflon plate 1303 provided inside the cover 0204 are fixed by screws. The teflon plate 1303 covers and protects the waveguide port 1302 from pressure impact caused by external air changes, and prevents foreign objects from entering and damaging the microwave magnetron 1301.

Of course, in order to obtain a better drying effect, the microwave drying mechanism 13 may be provided in plurality, and is disposed on the side surface or the bottom of the upper portion (the cylindrical structure 0201) of the charging barrel 02, and of course, the specific arrangement manner may adopt uniform or non-uniform arrangement, for example, a plurality of microwave drying mechanisms 13 are uniformly arranged along the circumferential direction of the circumferential structure, and the like. Wherein the waveguide port 1302 is disposed toward the surface of the particulate material, such as when the microwave drying mechanism 13 is disposed on the top of the cartridge 02, the waveguide port 1302 is disposed downward and toward the upper surface of the particulate material.

As shown in fig. 1 to 5 and 7, the material turning mechanism includes: the blowing pipe 03, the positive pressure conveying mechanism and the air source conveying channel 06 are arranged in a vertically through manner; the material blowing pipe 03 is arranged in the charging barrel 02 and is connected with the bottom of the charging barrel 02, and a plurality of feeding holes 0301 are further formed in the pipe wall of the material blowing pipe 03, close to the bottom; the positive pressure conveying mechanism is communicated with the bottom of the blowing pipe 03 through the air source conveying channel 06.

This embodiment adopts pneumatics to upwards blow in proper order from blowing the lowest of material pipe 03, and upper portion granule material moves down in proper order, realizes circulating the granule material of stirring in proper order, the cooperation upper text simultaneously microwave drying mechanism 13 heat the granule, utilize the microwave to the characteristics of the sensitive, the moisture of preferential heating granule of utmost point shape molecule, heat the granule from moisture particle inside and drive moisture, cooperation pneumatics equal stirring granule material and even heat dissipation, the air current carries out gas exchange in feed cylinder 02 through malleation conveying mechanism, through the manifold cycles, the granule material that makes to dry accomplishes the desiccation and reaches drying effect under the operating mode of suitable temperature (below 100 ℃).

The positive pressure conveying mechanism is arranged on the lower layer of the mounting frame 01, and the air inlet is arranged downwards, so that foreign matters can be prevented from being sucked. Wherein, this malleation conveying mechanism can adopt air-blower 07, and further, preferably adopt turbofan, the wind pressure is less than 50Kpa and can satisfy the requirement, through this pnematic stirring granule material, more energy-conserving, high-efficient, to little and air pollution little etc. of environment heat dissipation ability.

In this embodiment, the positive pressure conveying mechanism and the negative pressure conveying mechanism described below may employ the same blower 07, wherein the negative pressure conveying mechanism is communicated with the positive pressure output port 0701 of the blower 07 through a negative pressure conveying passage, and the positive pressure conveying mechanism is communicated with the negative pressure output port 0702 of the blower 07 through an air source conveying passage 06. This embodiment merely exemplifies a case where the negative pressure conveying mechanism and the positive pressure conveying mechanism use the same blower, as shown in fig. 3 and 4. Of course, in the specific implementation, the positive pressure conveying mechanism and the negative pressure conveying mechanism can also adopt different structures, and when adopting different structures, the positive pressure conveying mechanism can adopt the blower 07 to turn over materials pneumatically, and can also adopt N to be introduced₂A gas source, etc.

Further, as shown in fig. 3, 4 and 5, an internal threaded pipe 0203 is welded at the bottom of the charging barrel 02, an external thread structure matched with the threaded pipe is arranged on the outer wall of the bottom of the blowing pipe 03, and the blowing pipe 03 and the charging barrel 02 are fixed by matching the external thread structure with the internal threaded pipe 0203.

The material blowing pipe 03 is preferably fixed at the center of the barrel body charging barrel 02, the material blowing pipe 03 adopts a structural form that wind force is fed from the bottom of the material blowing pipe, holes are formed on the periphery of the pipe wall close to the bottom for feeding, and an outlet is formed at the top for discharging, the material feeding holes 0301 are vertical rectangles, and the number of the material feeding holes 0301 is 4, as shown in fig. 7. The structure and number of the feed holes 0301 are only one of the realizable modes, and the protection scope of the present application is not limited, and those skilled in the art can adopt other structures or other numbers of feed holes 0301 according to the actual needs.

As shown in fig. 7, a bulge 0305 is further disposed on the blowing tube 03, wherein the bulge 0305 is disposed between the feeding hole 0301 and the cover 0304. Said bulge structure 0305 prevents hood 0304 from excessively lowering down into contact with the inner wall of funnel-shaped structure 0202, thus closing said inlet port 0301.

As shown in fig. 7, a cover 0304 is further disposed on the blowing pipe 03, and the cover 0304 is disposed near the bottom of the blowing pipe 03 and above the feeding hole 0301. The cover 0304 is used for dispersing the particles into the feed holes 0301, so that the particles in the charging barrel 02 uniformly enter the blowing pipe 03 from the periphery through the feed holes 0301, but the height of the particles entering the blowing pipe 03 does not exceed the upper end of the feed holes 0301.

The cover 0304 is detachably connected with the material blowing pipe 03 and can slide up and down along the material blowing pipe 03, and the distance between the lower edge of the cover 0304 and the bottom of the funnel-shaped structure 0202 is adjusted, so that the speed of the particle materials entering the material blowing pipe 03 is controlled.

Further, the cover 0304 is a bamboo hat type cover, wherein the material for making the cover 0304 is preferably non-metal material, preferably heat-resistant plastic or glass. The inclined plane of the bamboo hat-shaped cover and the horizontal plane preferably form an included angle of 45 degrees, and the inclined plane and the plane of the funnel-shaped structure 0202 correspondingly arranged are perpendicular to each other. The lower end of the central circular ring of the bamboo hat type cover is welded with a circle of bamboo hat type edge, and the bamboo hat type cover is sleeved on the material blowing pipe 03 through the central circular ring and fixed on the material blowing pipe 03 through screws.

In this embodiment, as shown in fig. 7, a bulk material tray 0303 is further installed on the top of the blowing pipe 03, wherein a particle material dispersing channel is further reserved between the top of the blowing pipe 03 and the bulk material tray 0303. The material scattering disk 0303 is preferably in a circular arc structure, wherein a small hole for installation and fixation is arranged in the center of the material scattering disk 0303.

The bulk material tray 0303 is detachably mounted on the top of the blowing pipe 03 through a support 0302. The bulk material tray 0303 is installed on the top end of the bracket 0302 through configured holes, so that a space distance is reserved between the bulk material tray 0303 and the top of the material blowing pipe 03, and a particle dispersing channel is reserved.

As shown in fig. 7, a circular ring is arranged at the bottom of the bracket 0302, the top end of the herringbone bracket 0302 is provided with a section of thread and is inserted into a hole of the bulk material tray 0303 and is fixed by a nut, the circular ring is sleeved at the top end of the blowing pipe 03, and the side surface of the circular ring can be locked on the blowing pipe 03 by a set screw.

Wherein the bulk tray 0303 is made of glass or ceramic material. The material drying device is used for dispersing the granular materials blown from the material blowing pipe 03 during drying and turning by utilizing the characteristics of high hardness, wear resistance and no microwave blocking of glass, ceramic and the like, and blocking the direct impact of the granules on the microwave drying mechanism 13; when wind power is used for feeding materials into the material blowing barrel 02, the material dispersing disc 0303 can disperse impact force of the fed particles, and the material dispersing disc 0303 at the pipe opening of the material blowing pipe 03 can also prevent particles from entering the material blowing pipe 03 from the upper opening to cause the phenomenon that the materials in the material blowing pipe 03 are stacked too high and blocked.

Certainly, the surface of the bulk tray 0303 can also be provided with a metal nano coating, which is used for dispersing the particles blown from the material blowing pipe 03 during drying and turning and blocking the particles from impacting the microwave drying mechanism 13; when wind power is used for feeding materials into the material blowing cylinder 02, the bulk material disc 0303 provided with the metal nano coating can disperse impact force of feeding particles, and the bulk material disc 0303 at the pipe opening of the material blowing pipe 03 can also prevent particles from entering the material blowing pipe 03 from the upper opening to cause too high and blockage of the particles accumulated in the material blowing pipe 03.

In this embodiment, a discharge channel 08 is further arranged at the bottom of the blowing pipe 03 in a communicating manner.

Further, the bottom of the material blowing pipe 03 is connected with a first port A of a three-way electric ball valve 05, a second port B of the three-way electric ball valve 05 is connected with the air source conveying channel 06, and a third port C of the three-way electric ball valve 05 is connected with the material discharging channel 08. The three-way electric ball valve 05 is used for controlling material turning and discharging.

The bottom of the blowing pipe 03 is connected with a first port A of the three-way electric ball valve 05 through a connecting pipeline 04. Wherein, connecting line 04 has a horizontal segment, and the setting of this horizontal segment can prevent that too much granule material whereabouts from getting into tee bend electric ball valve 05 and piling up, influences the switching-over switching of tee bend electric ball valve 05.

Further, a first three-way valve 0501 is arranged on the air source conveying channel 06, and the opening and closing of the air source conveying channel 06 is controlled by operating the first three-way valve 0501.

In this embodiment, an exhaust pipe 11 is further disposed on the charging barrel 02, wherein a nozzle of the exhaust pipe 11 is further provided with a one-way check valve 12. The exhaust pipe 11 and the one-way check valve 12 may be connected by welding, plugging, or bonding. After the negative pressure feeding is finished, the negative pressure conveying mechanism and the like are closed, the exhaust pipe 11 is opened, and the discharging operation can be carried out by depending on gravity and/or a valve arranged at a discharging port; and when negative pressure feeding is carried out, the exhaust pipe 11 is closed.

The air outlet 09 and the exhaust duct 11 are both arranged in parallel with the direction of the waveguide pipe port 1302 of the microwave drying mechanism 13. The air outlet 09 and the exhaust duct 11 are both provided with a pipe which is arranged to be lengthened inwards, wherein the length-diameter ratio of the pipe is more than or equal to 2, so that the microwave is prevented from being leaked to the outer side of the charging barrel 02 through the reflection inside the pipe. The practical measurement in the prototype work shows that when the length-diameter ratio of the adopted pipe is more than or equal to 2, the microwave instrument can hardly detect the microwave leakage at the pipe orifice. In the actual measurement state of the embodiment, the diameter of the pipe is 50mm, and the length is 120mm, but when the pipe diameter is thickened, the length-diameter ratio may need to be increased.

As shown in fig. 8 to 13, the one-way check valve 12 includes an outer cage a10 and a ball a20, wherein the outer cage a10 includes a receiving portion having a flow passage through the first cage a11 and a hole a101 provided in the outer cage a10, and a first cage a11, the receiving portion receiving the ball a 20; the ball A20 is built into the receptacle, and the outer diameter of the ball A20 is slightly larger than the mouth size of the first cage A11.

In this embodiment, the outer cage a10 and the exhaust duct 11 may be made of metal, plastic, or the like.

The exhaust duct 11 may be a straight duct or an elbow duct, and further, the elbow duct may be a 45 ° elbow duct as shown in fig. 8 to 12, where the bending angle of the elbow duct is merely an example and does not limit the protection scope of the present application. When the straight pipe or the bent pipe is applied specifically, the straight pipe or the bent pipe can be selected according to actual conditions, the straight pipe is simple to manufacture and suitable for vertical installation or small-angle inclination, the application range of the bent pipe is relatively wider, large-angle inclined installation can be carried out, and even horizontal installation can be achieved. Fig. 9 and 12 illustrate the case where the bent pipe is vertically installed, fig. 10 illustrates the case where the bent pipe is horizontally installed, and fig. 13 illustrates the case where the straight pipe is vertically installed. The above-described drawings are merely illustrative and do not limit the scope of the present application.

In the embodiment, one end of the outer cage a10 is provided with a first conical structure a12, and a first cage opening a11 is arranged on the first conical structure a 12; the other end of the outer cage A10 is provided with a second conical structure A14, a second cage opening A13 is arranged on the second conical structure A14, wherein the opening size of the second cage opening A13 is slightly smaller than the outer diameter of the sphere A20; the first taper structure a12 and the second taper structure a14 are connected to form the outer cage a10, or the first taper structure a12 and the second taper structure a14 are connected by a connector a15 to form the outer cage a10, wherein the connector a15 may be a cylindrical structure.

As shown in fig. 9, the included angle of the conical surface of the first conical structure a12 is 90-2 α °, and the roll inclination angle α is preferably 10-20 °, where the roll inclination angle α is the radial angle between the gravity direction and the cage edge of the first conical structure a 12. The arrangement ensures that the ball A20 can smoothly roll to the first cage opening A11 by means of self weight, and can easily roll the first cage opening A11 under small wind pressure. Because the rolling inclination angle alpha is smaller, the power required by the movement of the ball body is small, and the one-way check valve with the structure can be switched on or off under the condition of smaller pressure difference; and the ball body is made of soft material, and the sealing effect is better than that of a plate-type one-way valve.

The ball A20 is a hollow rubber ball or a light high-density sponge ball. The embodiment adopts the hollow rubber ball to reduce the mass; or, a light high-density sponge ball is adopted; the sphere A20 is soft in texture, wear-resistant, smooth and easy to deform in surface, and can adapt to the shape of the first cage opening A11 and be attached to the opening of the exhaust duct 11, so that the opening of the exhaust duct 11 is tightly sealed.

In this embodiment, in order to facilitate replacement of the ball a20, a second opening a13 is reserved in this embodiment, and the size of the opening is slightly smaller than the ball a20, so that the replacement ball a20 can be conveniently installed or taken out, and cannot easily escape from the cage. Preferably, the mouth size of the second cage opening A13 is slightly smaller than the outer diameter of the sphere A20 by 2-5 mm.

The sphere a20 is adapted at normal temperature or low temperature due to the limitation of the material of the sphere a 20; if the temperature is higher, corresponding high-temperature materials such as teflon, glass and even steel balls can be easily adopted. When the ball a20 is the hard ball, the outer cage a10 is further configured as an openable combined cage for easy replacement of the ball a 20.

The outer cage A10 is the ball cage structure, and it has a plurality of holes A101, hole A101 forms a circulation passageway with first cage mouth A11 on the one hand, and on the other hand can conveniently observe the inside operating condition of outer cage A10. The ball cage structure can be formed by steel wire weaving, welding or plate punching and the like. The hole a101 may be a circular hole, a kidney-shaped hole, a square hole, a trapezoid hole, a triangle hole, or an oval hole, and the specific shape of the hole 101 is merely an illustration and does not limit the scope of the present application.

The inner surface of the outer cage A10 is smooth, the ball A20 rolls easily, and the ball A20 does not damage the surface of the ball A20 when moving inside.

For the convenience of manufacturing and processing, the outer cage a10 is preferably of an integrally formed structure.

When the pressure in the barrel 02 is higher than the external pressure, the ball A20 jumps along with the airflow to release the pressure, and a flow passage is opened; when the pressure in the barrel 02 is lower than the external pressure, the ball A20 is adsorbed at the position of the first cage opening A11 to close the flow passage; when the pressure in the inner cavity of the charging barrel 02 is equal to the external pressure, the ball A20 can fall to the first cage opening A11 by self weight without blocking a flow passage.

As shown in fig. 1 to 4, the feeding mechanism includes: negative pressure conveying mechanism, with negative pressure transfer passage and feeder hopper 1002 that negative pressure conveying mechanism connects, wherein, negative pressure transfer passage still with the gas outlet 09 intercommunication setting of feed cylinder 02, the feeder hopper pass through the inlet pipe 1001 with the feed inlet 10 intercommunication setting of feed cylinder 02.

The feeding mechanism further comprises a negative pressure filter box 0902, and the negative pressure filter box 0902 is arranged on the negative pressure conveying channel in a communicating mode. In this embodiment, the negative pressure filter case 0902 is provided to increase the area to decrease the negative pressure airflow velocity and to deposit fine particles and other materials to prevent the fine particles and other materials from being sucked into the suction fan and damaging the suction fan blade.

A wire net 0903 is provided in the negative pressure filter case 0902. The wire net 0903 is used for depositing materials such as fine particles, wherein the wire net 0903 is preferably made of materials such as stainless steel.

Wherein the wire net 0903 may be disposed in the negative pressure filter tank 0902 in a horizontal, vertical, or inclined manner.

As shown in fig. 3, the wire net 0903 divides the negative pressure filter box 0902 into a first cavity and a second cavity, wherein a first port provided on the first cavity is communicated with a first negative pressure delivery sub-channel 0901 of the negative pressure delivery channel; the second interface arranged on the second cavity is communicated with a second negative pressure conveying sub-channel 0703 in the negative pressure conveying channel.

This embodiment illustrates the case where the wire net 0903 is installed horizontally, and the first cavity is disposed below the second cavity, that is, the first interface is disposed at a lower height than the second interface. Then, after passing through the first negative pressure delivery sub-channel 0901, the negative pressure airflow in the negative pressure delivery channel firstly enters the first cavity arranged below through the first port, and due to the intercepting and filtering effects of the wire mesh 0903, fine particles are gradually precipitated in the first cavity; the negative pressure air flow then enters the second chamber through the wire mesh 0903 and then enters the second negative pressure delivery sub-passageway 0703 from the second port. The arrangement of the wire net 0903 is merely an example and does not limit the scope of the present application.

The second negative pressure conveying sub-passage 0703 is also provided with a second three-way valve 0704, and the communication condition of the second negative pressure conveying sub-passage 0703 can be controlled by operating the second three-way valve 0704, such as switching.

The negative pressure filter case 0902 is made of a transparent material or the like, such as organic glass or the like. This transparent mode of arrangement is more easily observed the operating conditions in negative pressure filter case 0902, when the accumulation of filterable tiny granule material etc. is more, can in time carry out operations such as clearance or change.

The present embodiment is further provided with a temperature sensor 15, said temperature sensor 15 being arranged in the upper part of said cartridge 02, said temperature sensor 15 being adapted to monitor the operating temperature of the particulate material.

This embodiment is still configured with first level sensor 16 and second level sensor 17, first level sensor 16, second level sensor 17 sets up respectively the upper portion of feed cylinder 02 with the lower part of feed cylinder 02. Wherein, first level sensor 16 is close to first half setting of storage tank 01, second level sensor 17 is close to the discharge gate setting of feed cylinder 02, wherein, first level sensor 16 is used for detecting whether the material adds the setting station, second level sensor 17 is used for detecting the material level state of the material near the discharge gate.

The present embodiment is further provided with a driving power supply 14, and the driving power supply 14 is electrically connected to the microwave magnetron 1301.

The embodiment is further provided with a control electric box 18, the control electric box 18 is installed on the mounting frame 01, and the control electric box 18 is electrically connected with the microwave magnetron 1301, the three-way electric ball valve 05, the first three-way valve 0501, the second three-way valve 0704, the positive pressure conveying mechanism and the negative pressure conveying mechanism respectively. The control electric box 18 is internally provided with a microcomputer and an electric appliance control switch and is used for controlling the coordinated work of the microwave magnetron 1301, the three-way electric ball valve 05, the first three-way valve 0501, the second three-way valve 0704, the positive pressure conveying mechanism and the negative pressure conveying mechanism according to a set program.

The working principle of the application is as follows:

the particle material feeding process comprises the following steps: controlling an electric box 18 to automatically start an air blower 07 to pump negative pressure and enable a negative pressure environment to be formed in the material barrel 02, continuously pumping the granular materials in the feed hopper 1002 into the material barrel 02 in the negative pressure pumping process, and stopping feeding when the first material level sensor 16 detects that the materials are full or the materials are fed to a set station; during the negative pressure pumping process, the negative pressure filter case 0902 arranged in the negative pressure conveying channel can increase the area to reduce the speed of the negative pressure air flow, and can precipitate fine particles and other materials to prevent the fine particles and other materials from being sucked into the exhaust fan to damage the blades of the exhaust fan.

The material turning and heating working process comprises the following steps: the control electronic box 18 automatically starts the air blower 07 to blow air, wind power blows upwards through the air source conveying channel 06 and then through the port B of the three-way electric ball valve 05 to the lower end of the blowing pipe 03, the particle materials entering the blowing pipe 03 through the feed hole 0301 at the bottommost part are blown upwards, the particle materials are scattered around along with the wind power after impacting the bulk material tray 0303 at the top, and the particles fall to the topmost layer of the particle materials in a dispersed mode. And starting the air blower 07 to blow and turn over materials, and simultaneously starting the microwave drying mechanism 13 to perform microwave heating on the granular materials from the upper end. The granule material moves downwards and turns upwards layer by layer in the working process. The microwave emits microwave to the granular material, and the granular material is dynamically and uniformly heated. And in the process that the bottom granular materials are turned upwards along with wind power, the granular materials are cooled again by the wind power, and the granular materials are dried after multiple cycles. The particles are heated and cooled uniformly in the drying process, and local overheating or heating failure can not occur.

The microwave irradiation drying and the pneumatic upward particle turning can be carried out simultaneously, and the working time of the air supply/conveying air source and the microwave drying mechanism 13 can be separately controlled according to a set program, and the routine can properly adjust the frequent proportion of the work according to the initial temperature condition and the drying intensity requirement. When the temperature sensor 15 detects that the heating temperature is low, the operation mode of the blower 07 can be adjusted to be intermittent operation, and the microwave drying mechanism 13 is operated all the time. When the set temperature is reached, the microcomputer in the control electric box 18 automatically controls to reduce the working strength of the microwave drying mechanism 13 so as to prevent the granules from being overheated. And when the heating drying time reaches the time preset by the program, controlling the program to automatically stop heating and blowing to finish drying the cylinder of granular materials.

And (3) discharging: and after drying, preparing for discharging. Control electronic box 18 control tee bend electric ball valve 05 rotates, make the disconnection of first port A and second port B passageway in the tee bend electric ball valve 05, first port A and third port C passageway intercommunication, close air-blower 07 afterwards, the granule material is along blowing pipe 03 downwards through feed port 0301 under the action of gravity, it is final to storage case 0801 to enter discharging channel 08 through tee bend electric ball valve 05, accomplish the ejection of compact, stop work promptly when the second level sensor 17 of bottommost detects no material, the duty cycle finishes. Waiting for the command to enter the next drying cycle, and circularly and repeatedly working.

It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present application to describe certain components, these components should not be limited by these terms. These terms are only used to distinguish one component from another. For example, a first certain component may also be referred to as a second certain component, and similarly, a second certain component may also be referred to as a first certain component without departing from the scope of embodiments herein.

It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.

The above embodiments are merely to illustrate the technical solutions of the present application and are not limitative, and the present application is described in detail with reference to preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made in the present invention without departing from the spirit and scope of the present invention and shall be covered by the appended claims.

Claims (32)

1. A microwave drying apparatus, comprising:

a cartridge having a receiving space for receiving particulate material;

the feeding mechanism is used for conveying granular materials and communicated with the charging barrel;

the stirring mechanism is connected with the charging barrel and is used for feeding and stirring the granular materials in the charging barrel;

and the microwave drying mechanism is arranged on the charging barrel and is used for drying the granular materials in the charging barrel.

2. Microwave drying apparatus according to claim 1,

the stirring mechanism comprises: the blowing pipe, the positive pressure conveying mechanism and the air source conveying channel are arranged in a vertically through manner;

the material blowing pipe is arranged in the material barrel and connected with the bottom of the material barrel, and a plurality of feeding holes are formed in the material blowing pipe;

the positive pressure conveying mechanism is communicated with the bottom of the blowing pipe through the air source conveying channel.

3. The microwave drying apparatus of claim 2, wherein the blowing pipe is further provided with a cover, and the cover is arranged near the bottom of the blowing pipe and above the feeding hole.

4. A microwave drying apparatus as claimed in claim 3 wherein the hood is removably connected to the blow pipe and is slidable up and down the blow pipe.

5. The microwave drying equipment according to claim 3 or 4, wherein the blowing pipe is further provided with a raised structure, wherein the raised structure is arranged between the feeding hole and the cover.

6. A microwave drying apparatus according to claim 3 or 4, wherein the hood is a bamboo hat type hood.

7. The microwave drying equipment according to claim 2, 3 or 4, wherein a bulk material tray is further installed on the top of the blowing pipe, and a particle material dispersing channel is further reserved between the top of the blowing pipe and the bulk material tray.

8. A microwave drying apparatus as in claim 7 wherein the bulk tray is removably mounted on top of the blow tube by a bracket.

9. A microwave drying apparatus in accordance with claim 7 wherein the bulk discs are made of glass or ceramic material.

10. A microwave drying apparatus as in claim 7 wherein the surface of the bulk discs are provided with a metallic nano-coating.

11. The microwave drying equipment as claimed in claim 2, wherein a discharge channel is further arranged at the bottom of the blowing pipe in a communication manner.

12. A microwave drying device according to claim 2, 3, 4 or 11, wherein the bottom of the blowing pipe is connected with a first port of a three-way electric ball valve, a second port of the three-way electric ball valve is connected with the gas source delivery passage, and a third port of the three-way electric ball valve is connected with a discharge passage.

13. A microwave drying apparatus as claimed in claim 12, wherein the bottom of the blowing pipe is connected to the first port of the three-way electric ball valve through a connecting pipeline.

14. A microwave drying apparatus as in claim 13 wherein the connecting conduit has a horizontal section.

15. A microwave drying apparatus according to claim 2 or 3 or 4 or 11 wherein the feed mechanism comprises: negative pressure conveying mechanism, with negative pressure transfer passage and feeder hopper that negative pressure conveying mechanism connects, wherein, negative pressure transfer passage still with the gas outlet intercommunication setting of feed cylinder, the feeder hopper pass through the inlet pipe with the feed inlet intercommunication setting of feed cylinder.

16. A microwave drying apparatus as in claim 15 wherein the feed mechanism further comprises a negative pressure filter box, the negative pressure filter box being communicatively disposed on the negative pressure conveying path.

17. A microwave drying apparatus according to claim 16 wherein a wire mesh is provided in the suction filter box in a horizontal, vertical or inclined manner.

18. A microwave drying apparatus according to claim 17, wherein the wire mesh divides the negative pressure filter box into a first cavity and a second cavity, wherein a first port provided on the first cavity is provided in communication with a first negative pressure delivery sub-channel of the negative pressure delivery channels; and a second interface arranged on the second cavity is communicated with a second negative pressure conveying sub-channel in the negative pressure conveying channel.

19. A microwave drying apparatus according to claim 16 wherein the negative pressure filter box is made of a transparent material.

20. A microwave drying apparatus according to claim 16 wherein the negative pressure conveying mechanism shares the same blower with the positive pressure conveying mechanism and a motor used in cooperation with the blower, wherein the negative pressure conveying mechanism is communicated with a positive pressure output port of the blower via a negative pressure conveying passage, and the positive pressure conveying mechanism is communicated with a negative pressure output port of the blower via an air source conveying passage.

21. A microwave drying apparatus according to claim 1, 2, 3, 4 or 11, wherein the charging barrel is further provided with an exhaust pipe, wherein the nozzle of the exhaust pipe is further provided with a one-way check valve.

22. A microwave drying apparatus as claimed in claim 21 wherein the one-way check valve comprises an outer cage and a ball, wherein the outer cage comprises a receptacle and a first cage opening, the receptacle having a flow passage through the first cage opening and a hole provided in the outer cage, the receptacle being for receiving the ball; the ball body is arranged in the accommodating part, and the outer diameter of the ball body is slightly larger than the size of the opening of the first cage opening.

23. A microwave drying apparatus as in claim 22 wherein one end of the outer cage has a first tapered configuration with a first cage opening disposed thereon; the other end of the outer cage is provided with a second conical structure, the second conical structure is also provided with a second cage opening, and the size of the opening of the second cage opening is slightly smaller than the outer diameter of the sphere; the first conical structure and the second conical structure are connected to form the outer cage, or the same connecting body of the first conical structure and the second conical structure forms the outer cage.

24. A microwave drying apparatus according to claim 23, wherein the first conical structure has a conical surface angle of 90-2 ° and a rolling inclination angle α of 10-20 °, wherein the rolling inclination angle α is a radial angle between a gravity direction and a cage edge of the first conical structure.

25. A microwave drying apparatus as in claim 22 wherein the ball is one of a hollow rubber ball, a light high density sponge ball, a teflon ball, a glass ball or a steel ball.

26. A microwave drying apparatus as in claim 22 wherein the inner corners of the connection of the exhaust duct to the first cage opening are smooth annular chamfers, wherein the annular chamfers form an internal taper that facilitates a snug fit with the surface of the sphere.

27. A microwave drying apparatus as claimed in claim 22 wherein the exhaust duct and the outlet are each provided with an inwardly extending pipe, wherein the length to diameter ratio of the pipe is 2 or greater.

28. A microwave drying apparatus according to claim 1 or 2 or 3 or 4 or 11 wherein the microwave drying mechanism comprises a microwave magnetron mounted on the cartridge through a waveguide port.

29. A microwave drying apparatus as in claim 28 wherein the bottom of the waveguide port is covered with a teflon plate by which the waveguide port is secured to the lid on the top of the cartridge.

30. A microwave drying apparatus according to claim 1 or 2 or 3 or 4 or 11 further comprising a temperature sensor disposed at an upper portion of the cartridge.

31. A microwave drying apparatus according to claim 1 or 2 or 3 or 4 or 11 further comprising a first level sensor and a second level sensor, the first level sensor and the second level sensor being respectively disposed at an upper portion and a lower portion of the cartridge.

32. A microwave drying apparatus according to claim 1 or 2 or 3 or 4 or 11, further comprising a control electric box electrically connected with the microwave magnetron, the three-way electric ball valve, the first three-way valve, the second three-way valve, the positive pressure conveying mechanism and the negative pressure conveying mechanism, respectively.

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