Variable-frequency energy-saving drying hopper

Abstract

The utility model discloses a variable-frequency energy-saving drying hopper, which belongs to the technical field of material drying equipment and particularly comprises a storage bin. The bin bottom and the bin cover are conical; an air uniformizing cavity is formed in the inner wall of the conical bin bottom, and a plurality of air outlets are formed in the air uniformizing cavity; an air inlet end communicated with the air uniformizing cavity is arranged on the side face of the conical bin bottom, a hot air supply unit is installed at the air inlet end through a connecting pipe, and a temperature and humidity sensing probe and a temperature sensing probe which are electrically connected with the frequency conversion control box are installed on the bin cover and the air inlet end respectively. Hot air in the drying hopper can be evenly distributed, temperature data of hot air entering the drying hopper and temperature and humidity data of air exhausted from the top of the drying hopper can be monitored in real time, and intelligent granule drying control is achieved through cooperation of the frequency conversion control box, the frequency conversion air blower and the hot air generator; the operation cost of the equipment can be effectively reduced; and meanwhile, the drying quality and efficiency of the product can be effectively improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of material drying equipment, specifically relating to a frequency conversion energy-saving drying hopper. Background Technology

[0002] Currently, traditional granule drying equipment such as hoppers and ovens rely on pre-setting specific temperatures and times based on the type of material being processed. However, as is well known, the humidity or moisture content of materials varies due to different factors. Even for the same type of material, humidity and moisture content differ under different environments. Relying solely on the material type to set the hot air temperature and drying time easily leads to incomplete drying of the granules or excessive drying time, resulting in abnormalities such as heat shrinkage and shrinkage. This not only seriously affects the drying quality of the material but also increases energy consumption under constant output power, leading to higher equipment operating costs. Secondly, in current known drying hoppers, the air inlet is generally located on the side. After the granules are loaded into the hopper, the hot air is obstructed when entering the hopper, resulting in uneven hot air distribution and significant temperature differences at the bottom of the hopper. To complete the drying process without affecting the quality of the granules themselves, operators can only use medium-low temperature hot air and extend the drying time, severely impacting the granule drying efficiency.

[0003] Therefore, we propose a frequency conversion energy-saving drying hopper. Utility Model Content

[0004] The purpose of this invention is to provide a variable frequency energy-saving drying hopper to solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A variable frequency energy-saving drying hopper includes a hopper; and a conical hopper bottom and a hopper cover respectively provided at both ends of the hopper; a discharge port is installed at the bottom of the conical hopper bottom; an air distribution cavity is provided on the inner wall of the conical hopper bottom, and a plurality of air outlets are provided on the air distribution cavity; an air inlet end is provided on the side of the conical hopper bottom, which communicates with the air distribution cavity, and a hot air supply unit is installed on the air inlet end through a connecting pipe, and a variable frequency control box for controlling the operation of the hot air supply unit is installed on the hot air supply unit; a temperature and humidity sensor probe and a temperature sensor probe electrically connected to the variable frequency control box are respectively installed on the hopper cover and the air inlet end.

[0007] Furthermore, the conical hopper bottom and hopper cover are detachably connected to the hopper via quick-locking fasteners.

[0008] Furthermore, the uniform air cavity is designed as a conical ring structure, and several air outlets are distributed at equal distances around the circumference of the uniform air cavity.

[0009] Furthermore, the air outlet is a long, narrow groove, and the inner side of the air outlet is designed with an inclined angle, with the inclination direction of the inner side of several air outlets being consistent.

[0010] Furthermore, the hot air supply unit includes a hot air generator installed on the connecting pipe and a variable frequency blower installed on the hot air generator. The control modules built into the hot air generator and the variable frequency blower are electrically connected to the variable frequency control box.

[0011] Furthermore, a mesh plate is fixed between the silo cover and the silo, and the mesh plate adopts an arc-shaped concave surface design; the silo cover has an arched spherical surface design, and an air outlet is provided at the middle of the top of the silo cover.

[0012] Furthermore, the unloading port includes a discharge pipe vertically fixed to the bottom of the conical bin; a discharge pipe is provided on the side of the discharge pipe near the top; a telescopic cylinder is fixed inside the discharge pipe, and a plug is fixed at the telescopic end of the top of the telescopic cylinder; after the telescopic cylinder retracts, a receiving chamber for accommodating the plug is reserved between the top of the telescopic cylinder and the discharge pipe.

[0013] Beneficial effects:

[0014] This invention employs a conical hopper bottom with a sandwiched layer forming a uniform airflow chamber on the inner wall. Several air outlets, angled around the conical bottom, are then positioned around this chamber to ensure uniform hot air distribution within the drying hopper, preventing uneven temperature distribution. Furthermore, the inclusion of temperature and humidity sensors allows for real-time monitoring of the temperature and humidity of the incoming hot air and the exhaust air. Combined with a frequency converter control box, a frequency converter blower, and a hot air generator, the hot air supply unit automatically adjusts the power of the blower and generator based on real-time data from the hopper, thereby regulating the hot air temperature and feed rate. This enables intelligent drying control based on real-time changes in the granules. Compared to traditional drying control methods that use constant time and output power, this drying hopper is more energy-efficient, effectively reducing operating costs and improving product drying quality and efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of a half-section of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the present utility model. Figure 2 .

[0018] In the diagram: 1. Hopper; 2. Quick-lock; 3. Conical hopper bottom; 4. Hopper cover; 5. Discharge port; 501. Drop pipe; 502. Telescopic cylinder; 503. Plug; 504. Discharge pipe; 6. Air distribution chamber; 7. Air inlet; 8. Connecting pipe; 9. Hot air generator; 10. Variable frequency blower; 11. Variable frequency control box; 12. Temperature sensor probe; 13. Temperature and humidity sensor probe; 14. Air outlet; 15. Mesh plate; 16. Air outlet. Detailed Implementation

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0020] Example:

[0021] To address the problems of uneven temperature distribution, long drying time, low efficiency, high energy consumption, and high operating costs in existing granular drying equipment, we have made improvements to the existing conical drying hopper design and proposed a frequency conversion energy-saving drying hopper; the specific solution is as follows:

[0022] like Figure 1-3 As shown, this embodiment provides a variable frequency energy-saving drying hopper, specifically including a hopper 1; and a conical hopper bottom 3 and a hopper cover 4 respectively provided at both ends of the hopper 1; in view of the many inconveniences in the cleaning process of the traditional one-piece hopper 1, in this embodiment, the conical hopper bottom 3 and the hopper cover 4 are detachably connected to the hopper 1 by quick-locking buckles 2, wherein there are several quick-locking buckles 2 and they are evenly distributed around the circumference of the hopper 1; when it is necessary to clean the inside of the hopper, the hopper 1, the hopper cover 4 and the conical hopper bottom 3 can be separated by quick-locking buckles 2.

[0023] To ensure uniform temperature distribution inside the drying hopper, a uniform air distribution chamber 6 is provided on the inner wall of the conical hopper bottom 3. The uniform air distribution chamber 6 has several air outlets 16. The uniform air distribution chamber 6 is designed as a conical annular structure, with the air outlets 16 evenly distributed around its circumference. Each air outlet 16 is a long, narrow groove, and the inner side of each air outlet 16 is angled. The angle of the inner sides of all air outlets 16 is consistent. This conical annular design of the uniform air distribution chamber 6, combined with the long, narrow air outlets 16 surrounding its circumference, ensures uniform temperature distribution without affecting the material at the bottom of the hopper. Under the premise of convergence, the hot air is made to enter the hopper 1 evenly from the bottom of the hopper to the hopper 1. In addition, with the inclined design of the inner side of the air outlet 16, the hot air can form an upward vortex inside the empty hopper 1 when it is sprayed out from the air outlet 16. When the hopper is filled with granules, the dead corners through which the hot air flows can be minimized by the obstruction of the granules and the gaps between the granules. This further improves the uniformity of temperature distribution inside the hopper 1 and avoids local temperature too high or too low inside the hopper 1, thereby improving the drying quality of the granules.

[0024] Compared to the traditional timed and constant-temperature drying process of drying hoppers, which suffers from high energy consumption, high equipment operating costs, difficulty in uniformizing granule drying quality, and low efficiency, this embodiment provides an air inlet 7 on the side of the conical hopper bottom 3, which communicates with the uniform air chamber 6. A hot air supply unit is installed on the air inlet 7 via a connecting pipe 8, and a frequency converter control box 11 is installed on the hot air supply unit to control its operation. The hot air supply unit includes a hot air generator 9 installed on the connecting pipe 8 and a frequency converter blower 10 installed on the hot air generator 9. The built-in control module is electrically connected to the frequency converter control box 11. In order to obtain real-time data inside the hopper 1, temperature and humidity sensor probe 13 and temperature sensor probe 12, which are electrically connected to the frequency converter control box 11, are installed on the hopper cover 4 and the air inlet 7, respectively. The main function of temperature sensor probe 12 and temperature and humidity sensor probe 13 is to monitor the temperature of the hot air entering the drying hopper and the temperature and humidity of the hot air discharged from the top of the hopper in real time during the operation of the equipment. By monitoring the changes in the data, real-time data reference is provided for the frequency converter control box 11 to control the operation of the hot air supply unit.

[0025] Due to the different types and quality of granules, in order to prevent the granules from overflowing from the air outlet 14 on the silo cover 4 with hot air, a mesh plate 15 is fixed between the silo cover 4 and the silo 1. The mesh plate 15 adopts an arc-shaped concave design. The silo cover 4 has an arched spherical design. The air outlet 14 is located in the middle of the top of the silo cover 4. After the entire silo cover 4 and the mesh plate 15 are closed, a cavity is formed in the middle. On the one hand, it provides a certain obstruction for the granules, and on the other hand, it protects the temperature and humidity sensor probe 13, avoiding collision or obstruction between the granules and the sensor probe, thereby improving the accuracy of temperature and humidity sensor data acquisition.

[0026] For convenient subsequent discharge of granules, a discharge port 5 is installed at the bottom of the conical silo bottom 3. The discharge port 5 includes a drop pipe 501 vertically fixed to the conical silo bottom 3; a discharge pipe 504 is provided on the side of the drop pipe 501 near the top; a telescopic cylinder 502 is fixed inside the drop pipe 501, and a plug 503 is fixed at the telescopic end of the top of the telescopic cylinder 502. After the telescopic cylinder 502 retracts, a receiving chamber for accommodating the plug 503 is reserved between the top of the telescopic cylinder 502 and the discharge pipe 504; when the telescopic end of the front end of the telescopic cylinder 502 extends, the plug 503 is raised above the end of the drop pipe 501, thus achieving discharge sealing; when the telescopic end of the front end of the telescopic cylinder 502 retracts, the plug 503 moves down to the receiving chamber, exposing the end of the drop pipe 501, and the discharge port 5 is opened to achieve discharge.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A variable frequency energy-saving drying hopper, comprising a hopper (1); and a conical hopper bottom (3) and a hopper cover (4) respectively provided at both ends of the hopper (1); wherein a discharge port (5) is installed at the bottom of the conical hopper bottom (3); characterized in that, The inner wall of the conical bottom (3) is provided with a uniform air chamber (6), and the uniform air chamber (6) is provided with a plurality of air outlets (16); the side of the conical bottom (3) is provided with an air inlet (7) communicating with the uniform air chamber (6), and the air inlet (7) is connected to a hot air supply unit through a connecting pipe (8), and the hot air supply unit is equipped with a frequency converter control box (11) for controlling the operation of the hot air supply unit; the cover (4) and the air inlet (7) are respectively equipped with a temperature and humidity sensor probe (13) and a temperature sensor probe (12) electrically connected to the frequency converter control box (11).

2. The variable frequency energy-saving drying hopper according to claim 1, characterized in that, The conical silo bottom (3) and silo cover (4) are detachably connected to the silo (1) via quick-locking buckles (2).

3. The variable frequency energy-saving drying hopper according to claim 1, characterized in that, The uniform air chamber (6) is designed as a conical ring structure, and several air outlets (16) are distributed at equal distances around the circumference of the uniform air chamber (6).

4. The variable frequency energy-saving drying hopper according to claim 3, characterized in that, The air outlet (16) is a long strip-shaped slot, and the inner side of the air outlet (16) is designed with an inclined angle. The inclination direction of the inner side of several air outlets (16) is consistent.

5. The variable frequency energy-saving drying hopper according to claim 1, characterized in that, The hot air supply unit includes a hot air generator (9) installed on the connecting pipe (8) and a variable frequency blower (10) installed on the hot air generator (9). The control modules on the hot air generator (9) and the variable frequency blower (10) are electrically connected to the variable frequency control box (11).

6. The variable frequency energy-saving drying hopper according to claim 2, characterized in that, A mesh plate (15) is fixed between the silo cover (4) and the silo (1). The mesh plate (15) adopts an arc-shaped concave surface design. The silo cover (4) is an arched spherical surface design. An air outlet (14) is provided at the middle of the top of the silo cover (4).

7. The variable frequency energy-saving drying hopper according to claim 1, characterized in that, The unloading port (5) includes a discharge pipe (501) vertically fixed on the bottom (3) of the conical bin; a discharge pipe (504) is provided on the side of the discharge pipe (501) near the top; a telescopic cylinder (502) is fixed inside the discharge pipe (501), and a plug (503) is fixed at the telescopic end of the top of the telescopic cylinder (502). After the telescopic cylinder (502) is retracted, a receiving chamber for accommodating the plug (503) is reserved between the top of the telescopic cylinder (502) and the discharge pipe (504).

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